1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
3: #
4: # $Id: lonnavmaps.pm,v 1.541 2018/01/31 14:05:12 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: =pod
31:
32: =head1 NAME
33:
34: Apache::lonnavmaps - Subroutines to handle and render the navigation
35:
36: =head1 SYNOPSIS
37:
38: Handles navigational maps.
39:
40: The main handler generates the navigational listing for the course,
41: the other objects export this information in a usable fashion for
42: other modules.
43:
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48:
49: =head1 OVERVIEW
50:
51: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
52: course structure and caches it in what is often referred to as the
53: "big hash" X<big hash>. You can see it if you are logged into
54: LON-CAPA, in a course, by going to /adm/test. The content of
55: the hash will be under the heading "Big Hash".
56:
57: Access to /adm/test is controlled by a domain configuration,
58: which a Domain Coordinator will set for a server's default domain
59: via: Main Menu > Set domain configuration > Display (Access to
60: server status pages checked), and entering a username:domain
61: or IP address in the "Show user environment" row. Users with
62: an unexpired domain coordinator role in the server's domain
63: automatically receive access to /adm/test.
64:
65: Big Hash contains, among other things, how resources are related
66: to each other (next/previous), what resources are maps, which
67: resources are being chosen to not show to the student (for random
68: selection), and a lot of other things that can take a lot of time
69: to compute due to the amount of data that needs to be collected and
70: processed.
71:
72: Apache::lonnavmaps provides an object model for manipulating this
73: information in a higher-level fashion than directly manipulating
74: the hash. It also provides access to several auxiliary functions
75: that aren't necessarily stored in the Big Hash, but are a per-
76: resource sort of value, like whether there is any feedback on
77: a given resource.
78:
79: Apache::lonnavmaps also abstracts away branching, and someday,
80: conditions, for the times where you don't really care about those
81: things.
82:
83: Apache::lonnavmaps also provides fairly powerful routines for
84: rendering navmaps, and last but not least, provides the navmaps
85: view for when the user clicks the NAV button.
86:
87: B<Note>: Apache::lonnavmaps by default will show information
88: for the "currently logged in user". However, if information
89: about resources is needed for a different user, e.g., a bubblesheet
90: exam which uses randomorder, or randompick needs to be printed or
91: graded for named user(s) or specific CODEs, then the username,
92: domain, or CODE can be passed as arguments when creating a new
93: navmap object.
94:
95: Note if you want things like "due dates for another student",
96: you would use the EXT function instead of lonnavmaps.
97: That said, the lonnavmaps module can still help, because many
98: things, such as the course structure, are usually constant
99: between users, and Apache::lonnavmaps can help by providing
100: symbs for the EXT call.
101:
102: The rest of this file will cover the provided rendering routines,
103: which can often be used without fiddling with the navmap object at
104: all, then documents the Apache::lonnavmaps::navmap object, which
105: is the key to accessing the Big Hash information, covers the use
106: of the Iterator (which provides the logic for traversing the
107: somewhat-complicated Big Hash data structure), documents the
108: Apache::lonnavmaps::Resource objects that are returned singularly
109: by: getBySymb(), getById(), getByMapPc(), and getResourceByUrl()
110: (can also be as an array), or in an array by retrieveResources().
111:
112: =head1 Subroutine: render
113:
114: The navmap renderer package provides a sophisticated rendering of the
115: standard navigation maps interface into HTML. The provided nav map
116: handler is actually just a glorified call to this.
117:
118: Because of the large number of parameters this function accepts,
119: instead of passing it arguments as is normal, pass it in an anonymous
120: hash with the desired options.
121:
122: The package provides a function called 'render', called as
123: Apache::lonnavmaps::render({}).
124:
125: =head2 Overview of Columns
126:
127: The renderer will build an HTML table for the navmap and return
128: it. The table consists of several columns, and a row for each
129: resource (or possibly each part). You tell the renderer how many
130: columns to create and what to place in each column, optionally using
131: one or more of the prepared columns, and the renderer will assemble
132: the table.
133:
134: Any additional generally useful column types should be placed in the
135: renderer code here, so anybody can use it anywhere else. Any code
136: specific to the current application (such as the addition of <input>
137: elements in a column) should be placed in the code of the thing using
138: the renderer.
139:
140: At the core of the renderer is the array reference COLS (see Example
141: section below for how to pass this correctly). The COLS array will
142: consist of entries of one of two types of things: Either an integer
143: representing one of the pre-packaged column types, or a sub reference
144: that takes a resource reference, a part number, and a reference to the
145: argument hash passed to the renderer, and returns a string that will
146: be inserted into the HTML representation as it.
147:
148: All other parameters are ways of either changing how the columns
149: are printing, or which rows are shown.
150:
151: The pre-packaged column names are refered to by constants in the
152: Apache::lonnavmaps namespace. The following currently exist:
153:
154: =over 4
155:
156: =item * B<Apache::lonnavmaps::resource>:
157:
158: The general info about the resource: Link, icon for the type, etc. The
159: first column in the standard nav map display. This column provides the
160: indentation effect seen in the B<NAV> screen. This column also accepts
161: the following parameters in the renderer hash:
162:
163: =over 4
164:
165: =item * B<resource_nolink>: default false
166:
167: If true, the resource will not be linked. By default, all non-folder
168: resources are linked.
169:
170: =item * B<resource_part_count>: default true
171:
172: If true, the resource will show a part count B<if> the full
173: part list is not displayed. (See "condense_parts" later.) If false,
174: the resource will never show a part count.
175:
176: =item * B<resource_no_folder_link>:
177:
178: If true, the resource's folder will not be clickable to open or close
179: it. Default is false. True implies printCloseAll is false, since you
180: can't close or open folders when this is on anyhow.
181:
182: =item * B<map_no_edit_link>:
183:
184: If true, the title of the folder or page will not be followed by an
185: icon/link to direct editing of a folder or composite page, originally
186: added via the Course Editor.
187:
188: =back
189:
190: =item * B<Apache::lonnavmaps::communication_status>:
191:
192: Whether there is discussion on the resource, email for the user, or
193: (lumped in here) perl errors in the execution of the problem. This is
194: the second column in the main nav map.
195:
196: =item * B<Apache::lonnavmaps::quick_status>:
197:
198: An icon for the status of a problem, with five possible states:
199: Correct, incorrect, open, awaiting grading (for a problem where the
200: computer's grade is suppressed, or the computer can't grade, like
201: essay problem), or none (not open yet, not a problem). The
202: third column of the standard navmap.
203:
204: =item * B<Apache::lonnavmaps::long_status>:
205:
206: A text readout of the details of the current status of the problem,
207: such as "Due in 22 hours". The fourth column of the standard navmap.
208:
209: =item * B<Apache::lonnavmaps::part_status_summary>:
210:
211: A text readout summarizing the status of the problem. If it is a
212: single part problem, will display "Correct", "Incorrect",
213: "Not yet open", "Open", "Attempted", or "Error". If there are
214: multiple parts, this will output a string that in HTML will show a
215: status of how many parts are in each status, in color coding, trying
216: to match the colors of the icons within reason.
217:
218: Note this only makes sense if you are I<not> showing parts. If
219: C<showParts> is true (see below), this column will not output
220: anything.
221:
222: =back
223:
224: If you add any others please be sure to document them here.
225:
226: An example of a column renderer that will show the ID number of a
227: resource, along with the part name if any:
228:
229: sub {
230: my ($resource, $part, $params) = @_;
231: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
232: return '<td>' . $resource->{ID} . '</td>';
233: }
234:
235: Note these functions are responsible for the TD tags, which allow them
236: to override vertical and horizontal alignment, etc.
237:
238: =head2 Parameters
239:
240: Minimally, you should be
241: able to get away with just using 'cols' (to specify the columns
242: shown), 'url' (necessary for the folders to link to the current screen
243: correctly), and possibly 'queryString' if your app calls for it. In
244: that case, maintaining the state of the folders will be done
245: automatically.
246:
247: =over 4
248:
249: =item * B<iterator>: default: constructs one from %env
250:
251: A reference to a fresh ::iterator to use from the navmaps. The
252: rendering will reflect the options passed to the iterator, so you can
253: use that to just render a certain part of the course, if you like. If
254: one is not passed, the renderer will attempt to construct one from
255: env{'form.filter'} and env{'form.condition'} information, plus the
256: 'iterator_map' parameter if any.
257:
258: =item * B<iterator_map>: default: not used
259:
260: If you are letting the renderer do the iterator handling, you can
261: instruct the renderer to render only a particular map by passing it
262: the source of the map you want to process, like
263: '/res/103/jerf/navmap.course.sequence'.
264:
265: =item * B<include_top_level_map>: default: false
266:
267: If you need to include the top level map (meaning the course) in the
268: rendered output set this to true
269:
270: =item * B<navmap>: default: constructs one from %env
271:
272: A reference to a navmap, used only if an iterator is not passed in. If
273: this is necessary to make an iterator but it is not passed in, a new
274: one will be constructed based on env info. This is useful to do basic
275: error checking before passing it off to render.
276:
277: =item * B<r>: default: must be passed in
278:
279: The standard Apache response object. This must be passed to the
280: renderer or the course hash will be locked.
281:
282: =item * B<cols>: default: empty (useless)
283:
284: An array reference
285:
286: =item * B<showParts>:default true
287:
288: A flag. If true, a line for the resource itself, and a line
289: for each part will be displayed. If not, only one line for each
290: resource will be displayed.
291:
292: =item * B<condenseParts>: default true
293:
294: A flag. If true, if all parts of the problem have the same
295: status and that status is Nothing Set, Correct, or Network Failure,
296: then only one line will be displayed for that resource anyhow. If no,
297: all parts will always be displayed. If showParts is 0, this is
298: ignored.
299:
300: =item * B<jumpCount>: default: determined from %env
301:
302: A string identifying the URL to place the anchor 'curloc' at.
303: It is the responsibility of the renderer user to
304: ensure that the #curloc is in the URL. By default, determined through
305: the use of the env{} 'jump' information, and should normally "just
306: work" correctly.
307:
308: =item * B<here>: default: empty string
309:
310: A Symb identifying where to place the 'here' marker. The empty
311: string means no marker.
312:
313: =item * B<indentString>: default: 25 pixel whitespace image
314:
315: A string identifying the indentation string to use.
316:
317: =item * B<queryString>: default: empty
318:
319: A string which will be prepended to the query string used when the
320: folders are opened or closed. You can use this to pass
321: application-specific values.
322:
323: =item * B<url>: default: none
324:
325: The url the folders will link to, which should be the current
326: page. Required if the resource info column is shown, and you
327: are allowing the user to open and close folders.
328:
329: =item * B<currentJumpIndex>: default: no jumping
330:
331: Describes the currently-open row number to cause the browser to jump
332: to, because the user just opened that folder. By default, pulled from
333: the Jump information in the env{'form.*'}.
334:
335: =item * B<printKey>: default: false
336:
337: If true, print the key that appears on the top of the standard
338: navmaps.
339:
340: =item * B<printCloseAll>: default: true
341:
342: If true, print the "Close all folders" or "open all folders"
343: links.
344:
345: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
346:
347: A function that takes the resource object as its only parameter and
348: returns a true or false value. If true, the resource is displayed. If
349: false, it is simply skipped in the display.
350:
351: =item * B<suppressEmptySequences>: default: false
352:
353: If you're using a filter function, and displaying sequences to orient
354: the user, then frequently some sequences will be empty. Setting this to
355: true will cause those sequences not to display, so as not to confuse the
356: user into thinking that if the sequence is there there should be things
357: under it; for example, see the "Show Uncompleted Homework" view on the
358: B<NAV> screen.
359:
360: =item * B<suppressNavmaps>: default: false
361:
362: If true, will not display Navigate Content resources.
363:
364: =back
365:
366: =head2 Additional Info
367:
368: In addition to the parameters you can pass to the renderer, which will
369: be passed through unchange to the column renderers, the renderer will
370: generate the following information which your renderer may find
371: useful:
372:
373: =over 4
374:
375: =item * B<counter>:
376:
377: Contains the number of rows printed. Useful after calling the render
378: function, as you can detect whether anything was printed at all.
379:
380: =item * B<isNewBranch>:
381:
382: Useful for renderers: If this resource is currently the first resource
383: of a new branch, this will be true. The Resource column (leftmost in the
384: navmaps screen) uses this to display the "new branch" icon
385:
386: =back
387:
388: =cut
389:
390:
391: =head1 SUBROUTINES
392:
393: =over
394:
395: =item update()
396:
397: =item addToFilter()
398:
399: Convenience functions: Returns a string that adds or subtracts
400: the second argument from the first hash, appropriate for the
401: query string that determines which folders to recurse on
402:
403: =item removeFromFilter()
404:
405: =item getLinkForResource()
406:
407: Convenience function: Given a stack returned from getStack on the iterator,
408: return the correct src() value.
409:
410: =item getDescription()
411:
412: Convenience function: This separates the logic of how to create
413: the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
414: etc.) into a separate function. It takes a resource object as the
415: first parameter, and the part number of the resource as the second.
416: It's basically a big switch statement on the status of the resource.
417:
418: =item dueInLessThan24Hours()
419:
420: Convenience function, so others can use it: Is the problem due in less than 24 hours, and still can be done?
421:
422: =item lastTry()
423:
424: Convenience function, so others can use it: Is there only one try remaining for the
425: part, with more than one try to begin with, not due yet and still can be done?
426:
427: =item advancedUser()
428:
429: This puts a human-readable name on the env variable.
430:
431: =item timeToHumanString()
432:
433: timeToHumanString takes a time number and converts it to a
434: human-readable representation, meant to be used in the following
435: manner:
436:
437: =over 4
438:
439: =item * print "Due $timestring"
440:
441: =item * print "Open $timestring"
442:
443: =item * print "Answer available $timestring"
444:
445: =back
446:
447: Very, very, very, VERY English-only... goodness help a localizer on
448: this func...
449:
450: =item resource()
451:
452: returns 0
453:
454: =item communication_status()
455:
456: returns 1
457:
458: =item quick_status()
459:
460: returns 2
461:
462: =item long_status()
463:
464: returns 3
465:
466: =item part_status_summary()
467:
468: returns 4
469:
470: =item render_resource()
471:
472: =item render_communication_status()
473:
474: =item render_quick_status()
475:
476: =item render_long_status()
477:
478: =item render_parts_summary_status()
479:
480: =item setDefault()
481:
482: =item cmp_title()
483:
484: =item render()
485:
486: =item add_linkitem()
487:
488: =item show_linkitems_toolbar()
489:
490: =back
491:
492: =cut
493:
494: package Apache::lonnavmaps;
495:
496: use strict;
497: use GDBM_File;
498: use Apache::loncommon();
499: use Apache::lonenc();
500: use Apache::lonlocal;
501: use Apache::lonnet;
502: use Apache::lonmap;
503:
504: use POSIX qw (ceil floor strftime);
505: use Time::HiRes qw( gettimeofday tv_interval );
506: use LONCAPA;
507: use DateTime();
508: use HTML::Entities;
509:
510: # For debugging
511:
512: #use Data::Dumper;
513:
514:
515: # symbolic constants
516: sub SYMB { return 1; }
517: sub URL { return 2; }
518: sub NOTHING { return 3; }
519:
520: # Some data
521:
522: my $resObj = "Apache::lonnavmaps::resource";
523:
524: # Keep these mappings in sync with lonquickgrades, which usesthe colors
525: # instead of the icons.
526: my %statusIconMap =
527: (
528: $resObj->CLOSED => '',
529: $resObj->OPEN => 'navmap.open.gif',
530: $resObj->CORRECT => 'navmap.correct.gif',
531: $resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
532: $resObj->INCORRECT => 'navmap.wrong.gif',
533: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
534: $resObj->ERROR => ''
535: );
536:
537: my %iconAltTags = #texthash does not work here
538: ( 'navmap.correct.gif' => 'Correct',
539: 'navmap.wrong.gif' => 'Incorrect',
540: 'navmap.open.gif' => 'Is Open',
541: 'navmap.partial.gif' => 'Partially Correct',
542: 'navmap.ellipsis.gif' => 'Attempted',
543: );
544:
545: # Defines a status->color mapping, null string means don't color
546: my %colormap =
547: ( $resObj->NETWORK_FAILURE => '',
548: $resObj->CORRECT => '',
549: $resObj->EXCUSED => '#3333FF',
550: $resObj->PAST_DUE_ANSWER_LATER => '',
551: $resObj->PAST_DUE_NO_ANSWER => '',
552: $resObj->ANSWER_OPEN => '#006600',
553: $resObj->OPEN_LATER => '',
554: $resObj->TRIES_LEFT => '',
555: $resObj->INCORRECT => '',
556: $resObj->OPEN => '',
557: $resObj->NOTHING_SET => '',
558: $resObj->ATTEMPTED => '',
559: $resObj->CREDIT_ATTEMPTED => '',
560: $resObj->ANSWER_SUBMITTED => '',
561: $resObj->PARTIALLY_CORRECT => '#006600'
562: );
563: # And a special case in the nav map; what to do when the assignment
564: # is not yet done and due in less than 24 hours
565: my $hurryUpColor = "#FF0000";
566:
567: sub addToFilter {
568: my $hashIn = shift;
569: my $addition = shift;
570: my %hash = %$hashIn;
571: $hash{$addition} = 1;
572:
573: return join (",", keys(%hash));
574: }
575:
576: sub removeFromFilter {
577: my $hashIn = shift;
578: my $subtraction = shift;
579: my %hash = %$hashIn;
580:
581: delete $hash{$subtraction};
582: return join(",", keys(%hash));
583: }
584:
585: sub getLinkForResource {
586: my $stack = shift;
587: my $res;
588:
589: # Check to see if there are any pages in the stack
590: foreach $res (@$stack) {
591: if (defined($res)) {
592: my $anchor;
593: if ($res->is_page()) {
594: foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
595: $anchor=&escape($anchor->shown_symb());
596: return ($res->link(),$res->shown_symb(),$anchor);
597: }
598: # in case folder was skipped over as "only sequence"
599: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
600: if ($map=~/\.page$/) {
601: my $url=&Apache::lonnet::clutter($map);
602: $anchor=&escape($res->shown_symb());
603: return ($url,$res->shown_symb(),$anchor);
604: }
605: }
606: }
607:
608: # Failing that, return the src of the last resource that is defined
609: # (when we first recurse on a map, it puts an undefined resource
610: # on the bottom because $self->{HERE} isn't defined yet, and we
611: # want the src for the map anyhow)
612: foreach my $item (@$stack) {
613: if (defined($item)) { $res = $item; }
614: }
615:
616: if ($res) {
617: return ($res->link(),$res->shown_symb());
618: }
619: return;
620: }
621:
622:
623:
624: sub getDescription {
625: my $res = shift;
626: my $part = shift;
627: my $status = $res->status($part);
628:
629: my $open = $res->opendate($part);
630: my $due = $res->duedate($part);
631: my $answer = $res->answerdate($part);
632:
633: if ($status == $res->NETWORK_FAILURE) {
634: return &mt("Having technical difficulties; please check status later");
635: }
636: if ($status == $res->NOTHING_SET) {
637: return &Apache::lonhtmlcommon::direct_parm_link(&mt('Not currently assigned'),$res->symb(),'opendate',$part);
638: }
639: if ($status == $res->OPEN_LATER) {
640: return &mt("Open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($open,'start'),$res->symb(),'opendate',$part));
641: }
642: my $slotinfo;
643: if ($res->simpleStatus($part) == $res->OPEN) {
644: unless (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
645: my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);
646: my $slotmsg;
647: if ($slot_status == $res->UNKNOWN) {
648: $slotmsg = &mt('Reservation status unknown');
649: } elsif ($slot_status == $res->RESERVED) {
650: $slotmsg = &mt('Reserved - ends [_1]',
651: timeToHumanString($slot_time,'end'));
652: } elsif ($slot_status == $res->RESERVED_LOCATION) {
653: $slotmsg = &mt('Reserved - specific location(s) - ends [_1]',
654: timeToHumanString($slot_time,'end'));
655: } elsif ($slot_status == $res->RESERVED_LATER) {
656: $slotmsg = &mt('Reserved - next open [_1]',
657: timeToHumanString($slot_time,'start'));
658: } elsif ($slot_status == $res->RESERVABLE) {
659: $slotmsg = &mt('Reservable, reservations close [_1]',
660: timeToHumanString($slot_time,'end'));
661: } elsif ($slot_status == $res->NEEDS_CHECKIN) {
662: $slotmsg = &mt('Reserved, check-in needed - ends [_1]',
663: timeToHumanString($slot_time,'end'));
664: } elsif ($slot_status == $res->RESERVABLE_LATER) {
665: $slotmsg = &mt('Reservable, reservations open [_1]',
666: timeToHumanString($slot_time,'start'));
667: } elsif ($slot_status == $res->NOT_IN_A_SLOT) {
668: $slotmsg = &mt('Reserve a time/place to work');
669: } elsif ($slot_status == $res->NOTRESERVABLE) {
670: $slotmsg = &mt('Reservation not available');
671: } elsif ($slot_status == $res->WAITING_FOR_GRADE) {
672: $slotmsg = &mt('Submission in grading queue');
673: }
674: if ($slotmsg) {
675: if ($res->is_task() || !$due) {
676: return $slotmsg;
677: }
678: $slotinfo = (' ' x 2).'('.$slotmsg.')';
679: }
680: }
681: }
682: if ($status == $res->OPEN) {
683: if ($due) {
684: if ($res->is_practice()) {
685: return &mt("Closes [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'duedate',$part)).$slotinfo;
686: } else {
687: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)).$slotinfo;
688: }
689: } else {
690: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Open, no due date"),$res->symb(),'duedate',$part).$slotinfo;
691: }
692: }
693: if ($status == $res->PAST_DUE_ANSWER_LATER) {
694: return &mt("Answer open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($answer,'start'),$res->symb(),'answerdate',$part));
695: }
696: if ($status == $res->PAST_DUE_NO_ANSWER) {
697: if ($res->is_practice()) {
698: return &mt("Closed [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'answerdate,duedate',$part));
699: } else {
700: return &mt("Was due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'answerdate,duedate',$part));
701: }
702: }
703: if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
704: && $res->handgrade($part) ne 'yes') {
705: my $msg = &mt('Answer available');
706: my $parmlist = 'answerdate,duedate';
707: if (($res->is_tool) && ($res->is_gradable())) {
708: if (($status == $res->PARTIALLY_CORRECT) && ($res->parmval('retrypartial',$part))) {
709: $msg = &mt('Grade received');
710: $parmlist = 'retrypartial';
711: } else {
712: $msg = &mt('Grade available');
713: }
714: }
715: return &Apache::lonhtmlcommon::direct_parm_link($msg,$res->symb(),$parmlist,$part);
716: }
717: if ($status == $res->EXCUSED) {
718: return &mt("Excused by instructor");
719: }
720: if ($status == $res->ATTEMPTED) {
721: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
722: return &mt("Survey submission recorded");
723: } else {
724: return &mt("Answer submitted, not yet graded");
725: }
726: }
727: if ($status == $res->CREDIT_ATTEMPTED) {
728: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
729: return &mt("Credit for survey submission");
730: }
731: }
732: if ($status == $res->TRIES_LEFT) {
733: my $tries = $res->tries($part);
734: my $maxtries = $res->maxtries($part);
735: my $triesString = "";
736: if ($tries && $maxtries) {
737: $triesString = '<span class="LC_fontsize_medium"><i>('.&mt('[_1] of [quant,_2,try,tries] used',$tries,$maxtries).')</i></span>';
738: if ($maxtries > 1 && $maxtries - $tries == 1) {
739: $triesString = "<b>$triesString</b>";
740: }
741: }
742: if ($due) {
743: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)) .
744: " $triesString";
745: } else {
746: return &Apache::lonhtmlcommon::direct_parm_link(&mt("No due date"),$res->symb(),'duedate',$part)." $triesString";
747: }
748: }
749: if ($status == $res->ANSWER_SUBMITTED) {
750: return &mt('Answer submitted');
751: }
752: }
753:
754:
755: sub dueInLessThan24Hours {
756: my $res = shift;
757: my $part = shift;
758: my $status = $res->status($part);
759:
760: return ($status == $res->OPEN() ||
761: $status == $res->TRIES_LEFT()) &&
762: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
763: $res->duedate($part) > time();
764: }
765:
766:
767: sub lastTry {
768: my $res = shift;
769: my $part = shift;
770:
771: my $tries = $res->tries($part);
772: my $maxtries = $res->maxtries($part);
773: return $tries && $maxtries && $maxtries > 1 &&
774: $maxtries - $tries == 1 && $res->duedate($part) &&
775: $res->duedate($part) > time();
776: }
777:
778:
779: sub advancedUser {
780: return $env{'request.role.adv'};
781: }
782:
783: sub timeToHumanString {
784: my ($time,$type,$format) = @_;
785:
786: # zero, '0' and blank are bad times
787: if (!$time) {
788: return &mt('never');
789: }
790: unless (&Apache::lonlocal::current_language()=~/^en/) {
791: return &Apache::lonlocal::locallocaltime($time);
792: }
793: my $now = time();
794:
795: # Positive = future
796: my $delta = $time - $now;
797:
798: my $minute = 60;
799: my $hour = 60 * $minute;
800: my $day = 24 * $hour;
801: my $week = 7 * $day;
802: my $inPast = 0;
803:
804: # Logic in comments:
805: # Is it now? (extremely unlikely)
806: if ( $delta == 0 ) {
807: return "this instant";
808: }
809:
810: if ($delta < 0) {
811: $inPast = 1;
812: $delta = -$delta;
813: }
814:
815: if ( $delta > 0 ) {
816:
817: my $tense = $inPast ? " ago" : "";
818: my $prefix = $inPast ? "" : "in ";
819:
820: # Less than a minute
821: if ( $delta < $minute ) {
822: if ($delta == 1) { return "${prefix}1 second$tense"; }
823: return "$prefix$delta seconds$tense";
824: }
825:
826: # Less than an hour
827: if ( $delta < $hour ) {
828: # If so, use minutes; or minutes, seconds (if format requires)
829: my $minutes = floor($delta / 60);
830: if (($format ne '') && ($format =~ /\%(T|S)/)) {
831: my $display;
832: if ($minutes == 1) {
833: $display = "${prefix}1 minute";
834: } else {
835: $display = "$prefix$minutes minutes";
836: }
837: my $seconds = $delta % $minute;
838: if ($seconds == 0) {
839: $display .= $tense;
840: } elsif ($seconds == 1) {
841: $display .= ", 1 second$tense";
842: } else {
843: $display .= ", $seconds seconds$tense";
844: }
845: return $display;
846: }
847: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
848: return "$prefix$minutes minutes$tense";
849: }
850:
851: # Is it less than 24 hours away? If so,
852: # display hours + minutes, (and + seconds, if format specified it)
853: if ( $delta < $hour * 24) {
854: my $hours = floor($delta / $hour);
855: my $minutes = floor(($delta % $hour) / $minute);
856: my $hourString = "$hours hours";
857: my $minuteString = ", $minutes minutes";
858: if ($hours == 1) {
859: $hourString = "1 hour";
860: }
861: if ($minutes == 1) {
862: $minuteString = ", 1 minute";
863: }
864: if ($minutes == 0) {
865: $minuteString = "";
866: }
867: if (($format ne '') && ($format =~ /\%(T|S)/)) {
868: my $display = "$prefix$hourString$minuteString";
869: my $seconds = $delta-(($hours * $hour)+($minutes * $minute));
870: if ($seconds == 0) {
871: $display .= $tense;
872: } elsif ($seconds == 1) {
873: $display .= ", 1 second$tense";
874: } else {
875: $display .= ", $seconds seconds$tense";
876: }
877: return $display;
878: }
879: return "$prefix$hourString$minuteString$tense";
880: }
881:
882: # Date/time is more than 24 hours away
883:
884: my $dt = DateTime->from_epoch(epoch => $time)
885: ->set_time_zone(&Apache::lonlocal::gettimezone());
886:
887: # If there's a caller supplied format, use it, unless it only displays
888: # H:M:S or H:M.
889:
890: if (($format ne '') && ($format ne '%T') && ($format ne '%R')) {
891: my $timeStr = $dt->strftime($format);
892: return $timeStr.' ('.$dt->time_zone_short_name().')';
893: }
894:
895: # Less than 5 days away, display day of the week and
896: # HH:MM
897:
898: if ( $delta < $day * 5 ) {
899: my $timeStr = $dt->strftime("%A, %b %e at %I:%M %P (%Z)");
900: $timeStr =~ s/12:00 am/00:00/;
901: $timeStr =~ s/12:00 pm/noon/;
902: return ($inPast ? "last " : "this ") .
903: $timeStr;
904: }
905:
906: my $conjunction='on';
907: if ($type eq 'start') {
908: $conjunction='at';
909: } elsif ($type eq 'end') {
910: $conjunction='by';
911: }
912: # Is it this year?
913: my $dt_now = DateTime->from_epoch(epoch => $now)
914: ->set_time_zone(&Apache::lonlocal::gettimezone());
915: if ( $dt->year() == $dt_now->year()) {
916: # Return on Month Day, HH:MM meridian
917: my $timeStr = $dt->strftime("$conjunction %A, %b %e at %I:%M %P (%Z)");
918: $timeStr =~ s/12:00 am/00:00/;
919: $timeStr =~ s/12:00 pm/noon/;
920: return $timeStr;
921: }
922:
923: # Not this year, so show the year
924: my $timeStr =
925: $dt->strftime("$conjunction %A, %b %e %Y at %I:%M %P (%Z)");
926: $timeStr =~ s/12:00 am/00:00/;
927: $timeStr =~ s/12:00 pm/noon/;
928: return $timeStr;
929: }
930: }
931:
932:
933: sub resource { return 0; }
934: sub communication_status { return 1; }
935: sub quick_status { return 2; }
936: sub long_status { return 3; }
937: sub part_status_summary { return 4; }
938:
939: sub render_resource {
940: my ($resource, $part, $params) = @_;
941:
942: my $editmapLink;
943: my $nonLinkedText = ''; # stuff after resource title not in link
944:
945: my $link = $params->{"resourceLink"};
946: if ($resource->ext()) {
947: $link =~ s/\#.+(\?)/$1/g;
948: }
949:
950: # The URL part is not escaped at this point, but the symb is...
951:
952: my $src = $resource->src();
953: my $it = $params->{"iterator"};
954: my $filter = $it->{FILTER};
955:
956: my $title = $resource->compTitle();
957:
958: my $partLabel = "";
959: my $newBranchText = "";
960: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
961: # If this is a new branch, label it so
962: if ($params->{'isNewBranch'}) {
963: $newBranchText = "<img src='$location/branch.gif' alt=".mt('Branch')." />";
964: }
965:
966: # links to open and close the folder
967:
968: my $whitespace = $location.'/whitespace_21.gif';
969: my $linkopen = "<img src='$whitespace' alt='' />";
970: my $nomodal;
971: if (($params->{'modalLink'}) && (!$resource->is_sequence())) {
972: if ($link =~m{^(?:|/adm/wrapper)/ext/([^#]+)}) {
973: my $exturl = $1;
974: if (($ENV{'SERVER_PORT'} == 443) && ($exturl !~ /^https:/)) {
975: $nomodal = 1;
976: }
977: } elsif (($link eq "/public/$LONCAPA::match_domain/$LONCAPA::match_courseid/syllabus") &&
978: ($env{'request.course.id'}) && ($ENV{'SERVER_PORT'} == 443) &&
979: ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
980: $nomodal = 1;
981: }
982: my $esclink = &js_escape($link);
983: if ($nomodal) {
984: $linkopen .= "<a href=\"#\" onclick=\"javascript:window.open('$esclink','resourcepreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1'); return false;\" />";
985: } else {
986: $linkopen .= "<a href=\"$link\" onclick=\"javascript:openMyModal('$esclink',600,500,'yes','true'); return false;\">";
987: }
988: } else {
989: $linkopen .= "<a href=\"$link\">";
990: }
991: my $linkclose = "</a>";
992:
993: # Default icon: unknown page
994: my $icon = "<img class=\"LC_contentImage\" src='$location/unknown.gif' alt='' />";
995:
996: if ($resource->is_problem()) {
997: if ($part eq '0' || $params->{'condensed'}) {
998: $icon = '<img class="LC_contentImage" src="'.$location.'/';
999: if ($resource->is_task()) {
1000: $icon .= 'task.gif" alt="'.&mt('Task');
1001: } else {
1002: $icon .= 'problem.gif" alt="'.&mt('Problem');
1003: }
1004: $icon .='" />';
1005: } else {
1006: $icon = $params->{'indentString'};
1007: }
1008: } else {
1009: $icon = "<img class=\"LC_contentImage\" src='".&Apache::loncommon::icon($resource->src)."' alt='' />";
1010: }
1011:
1012: # Display the correct map icon to open or shut map
1013: if ($resource->is_map()) {
1014: my $mapId = $resource->map_pc();
1015: my $nowOpen = !defined($filter->{$mapId});
1016: if ($it->{CONDITION}) {
1017: $nowOpen = !$nowOpen;
1018: }
1019:
1020: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1021: my $title=$resource->title;
1022: $title=~s/\"/\&qout;/g;
1023: if (!$params->{'resource_no_folder_link'}) {
1024: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1025: $icon = "<img src='$location/arrow." . ($nowOpen ? 'closed' : 'open') . ".gif' alt='' />"
1026: ."<img class=\"LC_contentImage\" src='$location/$icon' alt=\""
1027: .($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1028: $linkopen = "<a href=\"" . $params->{'url'} . '?' .
1029: $params->{'queryString'} . '&filter=';
1030: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
1031: addToFilter($filter, $mapId) :
1032: removeFromFilter($filter, $mapId);
1033: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
1034: . $params->{'hereType'} . '&here=' .
1035: &escape($params->{'here'}) .
1036: '&jump=' .
1037: &escape($resource->symb()) .
1038: "&folderManip=1\">";
1039:
1040: } else {
1041: # Don't allow users to manipulate folder
1042: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1043: $icon = "<img class=\"LC_space\" src='$whitespace' alt='' />"."<img class=\"LC_contentImage\" src='$location/$icon' alt=\"".($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1044: if ($params->{'caller'} eq 'sequence') {
1045: $linkopen = "<a href=\"$link\">";
1046: } else {
1047: $linkopen = "";
1048: $linkclose = "";
1049: }
1050: }
1051: if (((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
1052: (&Apache::lonnet::allowed('cev',$env{'request.course.id'}))) &&
1053: ($resource->symb=~/\_\_\_[^\_]+\_\_\_uploaded/)) {
1054: if (!$params->{'map_no_edit_link'}) {
1055: my $icon = &Apache::loncommon::lonhttpdurl('/res/adm/pages').'/editmap.png';
1056: $editmapLink=' '.
1057: '<a href="/adm/coursedocs?command=directnav&symb='.&escape($resource->symb()).'">'.
1058: '<img src="'.$icon.'" alt="'.&mt('Edit Content').'" title="'.&mt('Edit Content').'" />'.
1059: '</a>';
1060: }
1061: }
1062: if ($params->{'mapHidden'} || $resource->randomout()) {
1063: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1064: }
1065: } else {
1066: if ($resource->randomout()) {
1067: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1068: }
1069: }
1070: if (!$resource->condval()) {
1071: $nonLinkedText .= ' <span class="LC_info">('.&mt('conditionally hidden').')</span> ';
1072: }
1073: if (($resource->is_practice()) && ($resource->is_raw_problem())) {
1074: $nonLinkedText .=' <span class="LC_info"><b>'.&mt('not graded').'</b></span>';
1075: }
1076:
1077: # We're done preparing and finally ready to start the rendering
1078: my $result = '<td class="LC_middle">';
1079: my $newfolderType = $resource->is_sequence() ? 'folder' : 'page';
1080:
1081: my $indentLevel = $params->{'indentLevel'};
1082: if ($newBranchText) { $indentLevel--; }
1083:
1084: # print indentation
1085: for (my $i = 0; $i < $indentLevel; $i++) {
1086: $result .= $params->{'indentString'};
1087: }
1088:
1089: # Decide what to display
1090: $result .= "$newBranchText$linkopen$icon$linkclose";
1091:
1092: my $curMarkerBegin = '';
1093: my $curMarkerEnd = '';
1094:
1095: # Is this the current resource?
1096: if (!$params->{'displayedHereMarker'} &&
1097: $resource->symb() eq $params->{'here'} ) {
1098: unless ($resource->is_map()) {
1099: $curMarkerBegin = '<span class="LC_current_nav_location">';
1100: $curMarkerEnd = '</span>';
1101: }
1102: $params->{'displayedHereMarker'} = 1;
1103: }
1104:
1105: if ($resource->is_problem() && $part ne '0' &&
1106: !$params->{'condensed'}) {
1107: my $displaypart=$resource->part_display($part);
1108: $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
1109: if ($link!~/\#/) { $link.='#'.&escape($part); }
1110: $title = "";
1111: }
1112:
1113: if ($params->{'condensed'} && $resource->countParts() > 1) {
1114: $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
1115: }
1116:
1117: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1118: $linkclose = '</a>';
1119: if ($params->{'modalLink'}) {
1120: my $esclink = &js_escape($link);
1121: if ($nomodal) {
1122: $linkopen = "<a href=\"#\" onclick=\"javascript:window.open('$esclink','resourcepreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1'); return false;\" />";
1123: } else {
1124: $linkopen = "<a href=\"$link\" onclick=\"javascript:openMyModal('$esclink',600,500,'yes','true'); return false;\">";
1125: }
1126: } else {
1127: $linkopen = "<a href=\"$link\">";
1128: }
1129: }
1130: $result .= "$curMarkerBegin$linkopen$title$partLabel$linkclose$curMarkerEnd$editmapLink$nonLinkedText</td>";
1131:
1132: return $result;
1133: }
1134:
1135: sub render_communication_status {
1136: my ($resource, $part, $params) = @_;
1137: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1138:
1139: my $link = $params->{"resourceLink"};
1140: my $linkopen = "<a href=\"$link\">";
1141: my $linkclose = "</a>";
1142: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1143:
1144: if ($resource->hasDiscussion()) {
1145: $discussionHTML = $linkopen .
1146: '<img alt="'.&mt('New Discussion').'" src="'.$location.'/chat.gif" title="'.&mt('New Discussion').'"/>' .
1147: $linkclose;
1148: }
1149:
1150: if ($resource->getFeedback()) {
1151: my $feedback = $resource->getFeedback();
1152: foreach my $msgid (split(/\,/, $feedback)) {
1153: if ($msgid) {
1154: $feedbackHTML .= ' <a href="/adm/email?display='
1155: . &escape($msgid) . '">'
1156: . '<img alt="'.&mt('New E-mail').'" src="'.$location.'/feedback.gif" title="'.&mt('New E-mail').'"/></a>';
1157: }
1158: }
1159: }
1160:
1161: if ($resource->getErrors()) {
1162: my $errors = $resource->getErrors();
1163: my $errorcount = 0;
1164: foreach my $msgid (split(/,/, $errors)) {
1165: last if ($errorcount>=10); # Only output 10 bombs maximum
1166: if ($msgid) {
1167: $errorcount++;
1168: $errorHTML .= ' <a href="/adm/email?display='
1169: . &escape($msgid) . '">'
1170: . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" title="'.&mt('New Error').'"/></a>';
1171: }
1172: }
1173: }
1174:
1175: if ($params->{'multipart'} && $part != '0') {
1176: $discussionHTML = $feedbackHTML = $errorHTML = '';
1177: }
1178: return "<td class=\"LC_middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
1179:
1180: }
1181: sub render_quick_status {
1182: my ($resource, $part, $params) = @_;
1183: my $result = "";
1184: my $firstDisplayed = !$params->{'condensed'} &&
1185: $params->{'multipart'} && $part eq "0";
1186:
1187: my $link = $params->{"resourceLink"};
1188: my $linkopen = "<a href=\"$link\">";
1189: my $linkclose = "</a>";
1190:
1191: $result .= '<td class="LC_middle">';
1192: if ($resource->is_gradable() &&
1193: !$firstDisplayed) {
1194: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1195: my $alt = $iconAltTags{$icon};
1196: if ($icon) {
1197: my $location=
1198: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1199: $result .= $linkopen.'<img src="'.$location.'" alt="'.&mt($alt).'" title="'.&mt($alt).'" />'.$linkclose;
1200: } else {
1201: $result .= " ";
1202: }
1203: } else { # not problem, no icon
1204: $result .= " ";
1205: }
1206: $result .= "</td>\n";
1207: return $result;
1208: }
1209: sub render_long_status {
1210: my ($resource, $part, $params) = @_;
1211: my $result = '<td class="LC_middle LC_right">';
1212: my $firstDisplayed = !$params->{'condensed'} &&
1213: $params->{'multipart'} && $part eq "0";
1214:
1215: my $color;
1216: my $info = '';
1217: if ($resource->is_gradable() || $resource->is_practice()) {
1218: $color = $colormap{$resource->status};
1219:
1220: if (dueInLessThan24Hours($resource, $part)) {
1221: $color = $hurryUpColor;
1222: $info = ' title="'.&mt('Due in less than 24 hours!').'"';
1223: } elsif (lastTry($resource, $part)) {
1224: unless (($resource->problemstatus($part) eq 'no') ||
1225: ($resource->problemstatus($part) eq 'no_feedback_ever')) {
1226: $color = $hurryUpColor;
1227: $info = ' title="'.&mt('One try remaining!').'"';
1228: }
1229: }
1230: }
1231:
1232: if (($resource->kind() eq "res") &&
1233: ($resource->is_raw_problem() || $resource->is_gradable()) &&
1234: !$firstDisplayed) {
1235: if ($color) {$result .= '<span style="color:'.$color.'"'.$info.'><b>'; }
1236: $result .= getDescription($resource, $part);
1237: if ($color) {$result .= "</b></span>"; }
1238: }
1239: if ($resource->is_map() && &advancedUser() && $resource->randompick()) {
1240: $result .= &mt('(randomly select [_1])', $resource->randompick());
1241: }
1242: if ($resource->is_map() && &advancedUser() && $resource->randomorder()) {
1243: $result .= &mt('(randomly ordered)');
1244: }
1245:
1246: # Debugging code
1247: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1248: # ' - Part: ' . $part;
1249:
1250: $result .= "</td>\n";
1251:
1252: return $result;
1253: }
1254:
1255: # Colors obtained by taking the icons, matching the colors, and
1256: # possibly reducing the Value (HSV) of the color, if it's too bright
1257: # for text, generally by one third or so.
1258: my %statusColors =
1259: (
1260: $resObj->CLOSED => '#000000',
1261: $resObj->OPEN => '#998b13',
1262: $resObj->CORRECT => '#26933f',
1263: $resObj->INCORRECT => '#c48207',
1264: $resObj->ATTEMPTED => '#a87510',
1265: $resObj->ERROR => '#000000'
1266: );
1267: my %statusStrings =
1268: (
1269: $resObj->CLOSED => 'Not yet open',
1270: $resObj->OPEN => 'Open',
1271: $resObj->CORRECT => 'Correct',
1272: $resObj->INCORRECT => 'Incorrect',
1273: $resObj->ATTEMPTED => 'Attempted',
1274: $resObj->ERROR => 'Network Error'
1275: );
1276: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1277:
1278: sub render_parts_summary_status {
1279: my ($resource, $part, $params) = @_;
1280: if (!$resource->is_gradable() && !$resource->contains_problem) { return '<td></td>'; }
1281: if ($params->{showParts}) {
1282: return '<td></td>';
1283: }
1284:
1285: my $td = "<td align='right'>\n";
1286: my $endtd = "</td>\n";
1287: my @probs;
1288:
1289: if ($resource->contains_problem) {
1290: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1291: } else {
1292: @probs=($resource);
1293: }
1294: my $return;
1295: my %overallstatus;
1296: my $totalParts;
1297: foreach my $resource (@probs) {
1298: # If there is a single part, just show the simple status
1299: if ($resource->singlepart()) {
1300: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1301: $overallstatus{$status}++;
1302: $totalParts++;
1303: next;
1304: }
1305: # Now we can be sure the $part doesn't really matter.
1306: my $statusCount = $resource->simpleStatusCount();
1307: my @counts;
1308: foreach my $status (@statuses) {
1309: # decouple display order from the simpleStatusCount order
1310: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1311: if ($statusCount->[$slot]) {
1312: $overallstatus{$status}+=$statusCount->[$slot];
1313: $totalParts+=$statusCount->[$slot];
1314: }
1315: }
1316: }
1317: $return.= $td . $totalParts . ' parts: ';
1318: foreach my $status (@statuses) {
1319: if ($overallstatus{$status}) {
1320: $return.='<span style="color:' . $statusColors{$status}
1321: . '">' . $overallstatus{$status} . ' '
1322: . $statusStrings{$status} . '</span>';
1323: }
1324: }
1325: $return.= $endtd;
1326: return $return;
1327: }
1328:
1329: my @preparedColumns = (\&render_resource, \&render_communication_status,
1330: \&render_quick_status, \&render_long_status,
1331: \&render_parts_summary_status);
1332:
1333: sub setDefault {
1334: my ($val, $default) = @_;
1335: if (!defined($val)) { return $default; }
1336: return $val;
1337: }
1338:
1339: sub cmp_title {
1340: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1341: $atitle=~s/^\s*//;
1342: $btitle=~s/^\s*//;
1343: return $atitle cmp $btitle;
1344: }
1345:
1346: sub render {
1347: my $args = shift;
1348: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1349: my $result = '';
1350: # Configure the renderer.
1351: my $cols = $args->{'cols'};
1352: if (!defined($cols)) {
1353: # no columns, no nav maps.
1354: return '';
1355: }
1356: my $navmap;
1357: if (defined($args->{'navmap'})) {
1358: $navmap = $args->{'navmap'};
1359: }
1360:
1361: my $r = $args->{'r'};
1362: my $queryString = $args->{'queryString'};
1363: my $jump = $args->{'jump'};
1364: my $here = $args->{'here'};
1365: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1366: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1367: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1368: # before the current resource when using #current
1369:
1370: # If we were passed 'here' information, we are not rendering
1371: # after a folder manipulation, and we were not passed an
1372: # iterator, make sure we open the folders to show the "here"
1373: # marker
1374: my $filterHash = {};
1375: # Figure out what we're not displaying
1376: foreach my $item (split(/\,/, $env{"form.filter"})) {
1377: if ($item) {
1378: $filterHash->{$item} = "1";
1379: }
1380: }
1381:
1382: # Filter: Remember filter function and add our own filter: Refuse
1383: # to show hidden resources unless the user can see them.
1384: my $userCanSeeHidden = advancedUser();
1385: my $filterFunc = setDefault($args->{'filterFunc'},
1386: sub {return 1;});
1387: if (!$userCanSeeHidden) {
1388: # Without renaming the filterfunc, the server seems to go into
1389: # an infinite loop
1390: my $oldFilterFunc = $filterFunc;
1391: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1392: &$oldFilterFunc($res);};
1393: }
1394:
1395: my $condition = 0;
1396: if ($env{'form.condition'}) {
1397: $condition = 1;
1398: }
1399:
1400: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1401: # Step 1: Check to see if we have a navmap
1402: if (!defined($navmap)) {
1403: $navmap = Apache::lonnavmaps::navmap->new();
1404: if (!defined($navmap)) {
1405: # no longer in course
1406: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1407: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1408: }
1409: }
1410:
1411: # Step two: Locate what kind of here marker is necessary
1412: # Determine where the "here" marker is and where the screen jumps to.
1413:
1414: if ($env{'form.postsymb'} ne '') {
1415: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1416: } elsif ($env{'form.postdata'} ne '') {
1417: # couldn't find a symb, is there a URL?
1418: my $currenturl = $env{'form.postdata'};
1419: #$currenturl=~s/^http\:\/\///;
1420: #$currenturl=~s/^[^\/]+//;
1421: unless ($args->{'caller'} eq 'sequence') {
1422: $here = $jump = &Apache::lonnet::symbread($currenturl);
1423: }
1424: }
1425: if (($here eq '') && ($args->{'caller'} ne 'sequence')) {
1426: my $last;
1427: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1428: &GDBM_READER(),0640)) {
1429: $last=$hash{'last_known'};
1430: untie(%hash);
1431: }
1432: if ($last) { $here = $jump = $last; }
1433: }
1434:
1435: # Step three: Ensure the folders are open
1436: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1437: my $curRes;
1438: my $found = 0;
1439:
1440: # We only need to do this if we need to open the maps to show the
1441: # current position. This will change the counter so we can't count
1442: # for the jump marker with this loop.
1443: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1444: if (ref($curRes) && $curRes->symb() eq $here) {
1445: my $mapStack = $mapIterator->getStack();
1446:
1447: # Ensure the parent maps are open
1448: for my $map (@{$mapStack}) {
1449: if ($condition) {
1450: undef $filterHash->{$map->map_pc()};
1451: } else {
1452: $filterHash->{$map->map_pc()} = 1;
1453: }
1454: }
1455: $found = 1;
1456: }
1457: }
1458: }
1459:
1460: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1461: # If this is a click on a folder or something, we want to preserve the "here"
1462: # from the querystring, and get the new "jump" marker
1463: $here = $env{'form.here'};
1464: $jump = $env{'form.jump'};
1465: }
1466:
1467: my $it = $args->{'iterator'};
1468: if (!defined($it)) {
1469: # Construct a default iterator based on $env{'form.'} information
1470:
1471: # Step 1: Check to see if we have a navmap
1472: if (!defined($navmap)) {
1473: $navmap = Apache::lonnavmaps::navmap->new();
1474: if (!defined($navmap)) {
1475: # no longer in course
1476: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1477: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1478: }
1479: }
1480:
1481: # See if we're being passed a specific map
1482: if ($args->{'iterator_map'}) {
1483: my $map = $args->{'iterator_map'};
1484: $map = $navmap->getResourceByUrl($map);
1485: my $firstResource = $map->map_start();
1486: my $finishResource = $map->map_finish();
1487:
1488: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1489: } else {
1490: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
1491: }
1492: }
1493:
1494: # (re-)Locate the jump point, if any
1495: # Note this does not take filtering or hidden into account... need
1496: # to be fixed?
1497: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1498: my $curRes;
1499: my $foundJump = 0;
1500: my $counter = 0;
1501:
1502: while (($curRes = $mapIterator->next()) && !$foundJump) {
1503: if (ref($curRes)) { $counter++; }
1504:
1505: if (ref($curRes) && $jump eq $curRes->symb()) {
1506:
1507: # This is why we have to use the main iterator instead of the
1508: # potentially faster DFS: The count has to be the same, so
1509: # the order has to be the same, which DFS won't give us.
1510: $args->{'currentJumpIndex'} = $counter;
1511: $foundJump = 1;
1512: }
1513: }
1514:
1515: my $showParts = setDefault($args->{'showParts'}, 1);
1516: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1517: # keeps track of when the current resource is found,
1518: # so we can back up a few and put the anchor above the
1519: # current resource
1520: my $printKey = $args->{'printKey'};
1521: my $printCloseAll = $args->{'printCloseAll'};
1522: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1523:
1524: # Print key?
1525: if ($printKey) {
1526: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1527: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1528: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1529: if ($navmap->{LAST_CHECK}) {
1530: $result .=
1531: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('New discussion since').' '.
1532: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1533: '</td><td align="center" valign="bottom"> '.
1534: '<img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').'<p>'.
1535: '</td>';
1536: } else {
1537: $result .= '<td align="center" valign="bottom"> '.
1538: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1539: ' <img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').
1540: '</td>';
1541: }
1542:
1543: $result .= '</tr></table>';
1544: }
1545:
1546: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1547: my ($link,$text);
1548: if ($condition) {
1549: $link='navmaps?condition=0&filter=&'.$queryString.
1550: '&here='.&escape($here);
1551: $text='Close all folders';
1552: } else {
1553: $link='navmaps?condition=1&filter=&'.$queryString.
1554: '&here='.&escape($here);
1555: $text='Open all folders';
1556: }
1557: if ($env{'form.register'}) {
1558: $link .= '&register='.$env{'form.register'};
1559: }
1560: if ($args->{'caller'} eq 'navmapsdisplay') {
1561: unless ($args->{'notools'}) {
1562: &add_linkitem($args->{'linkitems'},'changefolder',
1563: "location.href='$link'",$text);
1564: }
1565: } else {
1566: $result.= '<a href="'.$link.'">'.&mt($text).'</a>';
1567: }
1568: $result .= "\n";
1569: }
1570:
1571: # Check for any unread discussions in all resources.
1572: if (($args->{'caller'} eq 'navmapsdisplay') && (!$args->{'notools'})) {
1573: &add_linkitem($args->{'linkitems'},'clearbubbles',
1574: 'document.clearbubbles.submit()',
1575: 'Mark all posts read');
1576: my $time=time;
1577: my $querystr = &HTML::Entities::encode($ENV{'QUERY_STRING'},'<>&"');
1578: $result .= (<<END);
1579: <form name="clearbubbles" method="post" action="/adm/feedback">
1580: <input type="hidden" name="navurl" value="$querystr" />
1581: <input type="hidden" name="navtime" value="$time" />
1582: END
1583: if ($env{'form.register'}) {
1584: $result .= '<input type="hidden" name="register" value="'.$env{'form.register'}.'" />';
1585: }
1586: if ($args->{'sort'} eq 'discussion') {
1587: my $totdisc = 0;
1588: my $haveDisc = '';
1589: my @allres=$navmap->retrieveResources();
1590: foreach my $resource (@allres) {
1591: if ($resource->hasDiscussion()) {
1592: $haveDisc .= $resource->wrap_symb().':';
1593: $totdisc ++;
1594: }
1595: }
1596: if ($totdisc > 0) {
1597: $haveDisc =~ s/:$//;
1598: $result .= (<<END);
1599: <input type="hidden" name="navmaps" value="$haveDisc" />
1600: </form>
1601: END
1602: }
1603: }
1604: $result.='</form>';
1605: }
1606: if (($args->{'caller'} eq 'navmapsdisplay') &&
1607: ((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
1608: (&Apache::lonnet::allowed('cev',$env{'request.course.id'})))) {
1609: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1610: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1611: if ($env{'course.'.$env{'request.course.id'}.'.url'} eq
1612: "uploaded/$cdom/$cnum/default.sequence") {
1613: &add_linkitem($args->{'linkitems'},'edittoplevel',
1614: "javascript:gocmd('/adm/coursedocs','editdocs');",
1615: 'Content Editor');
1616: }
1617: }
1618:
1619: if ($args->{'caller'} eq 'navmapsdisplay') {
1620: $result .= &show_linkitems_toolbar($args,$condition);
1621: } elsif ($args->{'sort_html'}) {
1622: $result.=$args->{'sort_html'};
1623: }
1624:
1625: #$result .= "<br />\n";
1626: if ($r) {
1627: $r->print($result);
1628: $r->rflush();
1629: $result = "";
1630: }
1631: # End parameter setting
1632:
1633: $result .= "<br />\n";
1634:
1635: # Data
1636: $result.=&Apache::loncommon::start_data_table("LC_tableOfContent");
1637:
1638: my $res = "Apache::lonnavmaps::resource";
1639: my %condenseStatuses =
1640: ( $res->NETWORK_FAILURE => 1,
1641: $res->NOTHING_SET => 1,
1642: $res->CORRECT => 1 );
1643:
1644: # Shared variables
1645: $args->{'counter'} = 0; # counts the rows
1646: $args->{'indentLevel'} = 0;
1647: $args->{'isNewBranch'} = 0;
1648: $args->{'condensed'} = 0;
1649:
1650: my $location = &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace_21.gif");
1651: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' alt='' />");
1652: $args->{'displayedHereMarker'} = 0;
1653:
1654: # If we're suppressing empty sequences, look for them here.
1655: # We also do this even if $args->{'suppressEmptySequences'}
1656: # is not true, so we can hide empty sequences for which the
1657: # hiddenresource parameter is set to yes (at map level), or
1658: # mark as hidden for users who have $userCanSeeHidden.
1659: # Use DFS for speed, since structure actually doesn't matter,
1660: # except what map has what resources.
1661:
1662: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1663: $it->{FIRST_RESOURCE},
1664: $it->{FINISH_RESOURCE},
1665: {}, undef, 1);
1666: my $depth = 0;
1667: $dfsit->next();
1668: my $curRes = $dfsit->next();
1669: while ($depth > -1) {
1670: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1671: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1672:
1673: if (ref($curRes)) {
1674: # Parallel pre-processing: Do sequences have non-filtered-out children?
1675: if ($curRes->is_map()) {
1676: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1677: # Sequences themselves do not count as visible children,
1678: # unless those sequences also have visible children.
1679: # This means if a sequence appears, there's a "promise"
1680: # that there's something under it if you open it, somewhere.
1681: } elsif ($curRes->src()) {
1682: # Not a sequence: if it's filtered, ignore it, otherwise
1683: # rise up the stack and mark the sequences as having children
1684: if (&$filterFunc($curRes)) {
1685: for my $sequence (@{$dfsit->getStack()}) {
1686: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1687: }
1688: }
1689: }
1690: }
1691: } continue {
1692: $curRes = $dfsit->next();
1693: }
1694:
1695: my $displayedJumpMarker = 0;
1696: # Set up iteration.
1697: my $now = time();
1698: my $in24Hours = $now + 24 * 60 * 60;
1699: my $rownum = 0;
1700:
1701: # export "here" marker information
1702: $args->{'here'} = $here;
1703:
1704: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1705: my @resources;
1706: my $code='';# sub { !(shift->is_map();) };
1707: if ($args->{'sort'} eq 'title') {
1708: my $oldFilterFunc = $filterFunc;
1709: my $filterFunc=
1710: sub {
1711: my ($res)=@_;
1712: if ($res->is_map()) { return 0;}
1713: return &$oldFilterFunc($res);
1714: };
1715: @resources=$navmap->retrieveResources(undef,$filterFunc);
1716: @resources= sort { &cmp_title($a,$b) } @resources;
1717: } elsif ($args->{'sort'} eq 'duedate') {
1718: my $oldFilterFunc = $filterFunc;
1719: my $filterFunc=
1720: sub {
1721: my ($res)=@_;
1722: if (!$res->is_problem()) { return 0;}
1723: return &$oldFilterFunc($res);
1724: };
1725: @resources=$navmap->retrieveResources(undef,$filterFunc);
1726: @resources= sort {
1727: if ($a->duedate ne $b->duedate) {
1728: return $a->duedate cmp $b->duedate;
1729: }
1730: my $value=&cmp_title($a,$b);
1731: return $value;
1732: } @resources;
1733: } elsif ($args->{'sort'} eq 'discussion') {
1734: my $oldFilterFunc = $filterFunc;
1735: my $filterFunc=
1736: sub {
1737: my ($res)=@_;
1738: if (!$res->hasDiscussion() &&
1739: !$res->getFeedback() &&
1740: !$res->getErrors()) { return 0;}
1741: return &$oldFilterFunc($res);
1742: };
1743: @resources=$navmap->retrieveResources(undef,$filterFunc);
1744: @resources= sort { &cmp_title($a,$b) } @resources;
1745: } else {
1746: #unknow sort mechanism or default
1747: undef($args->{'sort'});
1748: }
1749:
1750: # Determine if page will be served with https in case
1751: # it contains a syllabus which uses an external URL
1752: # which points at an http site.
1753:
1754: my ($is_ssl,$cdom,$cnum,$hostname);
1755: if ($ENV{'SERVER_PORT'} == 443) {
1756: $is_ssl = 1;
1757: if ($r) {
1758: $hostname = $r->hostname();
1759: } else {
1760: $hostname = $ENV{'SERVER_NAME'};
1761: }
1762: }
1763: if ($env{'request.course.id'}) {
1764: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1765: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1766: }
1767:
1768: my $inhibitmenu;
1769: if ($args->{'modalLink'}) {
1770: $inhibitmenu = '&inhibitmenu=yes';
1771: }
1772:
1773: while (1) {
1774: if ($args->{'sort'}) {
1775: $curRes = shift(@resources);
1776: } else {
1777: $curRes = $it->next($closeAllPages);
1778: }
1779: if (!$curRes) { last; }
1780:
1781: # Maintain indentation level.
1782: if ($curRes == $it->BEGIN_MAP() ||
1783: $curRes == $it->BEGIN_BRANCH() ) {
1784: $args->{'indentLevel'}++;
1785: }
1786: if ($curRes == $it->END_MAP() ||
1787: $curRes == $it->END_BRANCH() ) {
1788: $args->{'indentLevel'}--;
1789: }
1790: # Notice new branches
1791: if ($curRes == $it->BEGIN_BRANCH()) {
1792: $args->{'isNewBranch'} = 1;
1793: }
1794:
1795: # If this isn't an actual resource, continue on
1796: if (!ref($curRes)) {
1797: next;
1798: }
1799:
1800: # If this has been filtered out, continue on
1801: if (!(&$filterFunc($curRes))) {
1802: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1803: next;
1804: }
1805:
1806: # If this is an empty sequence and we're filtering them, continue on
1807: $args->{'mapHidden'} = 0;
1808: if (($curRes->is_map()) && (!$curRes->{DATA}->{HAS_VISIBLE_CHILDREN})) {
1809: if ($args->{'suppressEmptySequences'}) {
1810: next;
1811: } else {
1812: my $mapname = &Apache::lonnet::declutter($curRes->src());
1813: $mapname = &Apache::lonnet::deversion($mapname);
1814: if (lc($navmap->get_mapparam(undef,$mapname,"0.hiddenresource")) eq 'yes') {
1815: if ($userCanSeeHidden) {
1816: $args->{'mapHidden'} = 1;
1817: } else {
1818: next;
1819: }
1820: }
1821: }
1822: }
1823:
1824: # If we're suppressing navmaps and this is a navmap, continue on
1825: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1826: next;
1827: }
1828:
1829: $args->{'counter'}++;
1830:
1831: # Does it have multiple parts?
1832: $args->{'multipart'} = 0;
1833: $args->{'condensed'} = 0;
1834: my @parts;
1835:
1836: # Decide what parts to show.
1837: if ($curRes->is_problem() && $showParts) {
1838: @parts = @{$curRes->parts()};
1839: $args->{'multipart'} = $curRes->multipart();
1840:
1841: if ($condenseParts) { # do the condensation
1842: if (!$args->{'condensed'}) {
1843: # Decide whether to condense based on similarity
1844: my $status = $curRes->status($parts[0]);
1845: my $due = $curRes->duedate($parts[0]);
1846: my $open = $curRes->opendate($parts[0]);
1847: my $statusAllSame = 1;
1848: my $dueAllSame = 1;
1849: my $openAllSame = 1;
1850: for (my $i = 1; $i < scalar(@parts); $i++) {
1851: if ($curRes->status($parts[$i]) != $status){
1852: $statusAllSame = 0;
1853: }
1854: if ($curRes->duedate($parts[$i]) != $due ) {
1855: $dueAllSame = 0;
1856: }
1857: if ($curRes->opendate($parts[$i]) != $open) {
1858: $openAllSame = 0;
1859: }
1860: }
1861: # $*allSame is true if all the statuses were
1862: # the same. Now, if they are all the same and
1863: # match one of the statuses to condense, or they
1864: # are all open with the same due date, or they are
1865: # all OPEN_LATER with the same open date, display the
1866: # status of the first non-zero part (to get the 'correct'
1867: # status right, since 0 is never 'correct' or 'open').
1868: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1869: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1870: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1871: @parts = ($parts[0]);
1872: $args->{'condensed'} = 1;
1873: }
1874: }
1875: # Multipart problem with one part: always "condense" (happens
1876: # to match the desirable behavior)
1877: if ($curRes->countParts() == 1) {
1878: @parts = ($parts[0]);
1879: $args->{'condensed'} = 1;
1880: }
1881: }
1882: }
1883:
1884: # If the multipart problem was condensed, "forget" it was multipart
1885: if (scalar(@parts) == 1) {
1886: $args->{'multipart'} = 0;
1887: } else {
1888: # Add part 0 so we display it correctly.
1889: unshift @parts, '0';
1890: }
1891:
1892: {
1893: my ($src,$symb,$anchor,$stack);
1894: if ($args->{'sort'}) {
1895: my $it = $navmap->getIterator(undef, undef, undef, 1);
1896: while ( my $res=$it->next()) {
1897: if (ref($res) &&
1898: $res->symb() eq $curRes->symb()) { last; }
1899: }
1900: $stack=$it->getStack();
1901: } else {
1902: $stack=$it->getStack();
1903: }
1904: ($src,$symb,$anchor)=getLinkForResource($stack);
1905: my $srcHasQuestion = $src =~ /\?/;
1906: if ($env{'request.course.id'}) {
1907: if (($is_ssl) && ($src =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) &&
1908: ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
1909: if ($hostname ne '') {
1910: $src = 'http://'.$hostname.$src;
1911: }
1912: $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
1913: $srcHasQuestion = 1;
1914: } elsif (($is_ssl) && ($src =~ m{^\Q/adm/wrapper/ext/\E(?!https:)})) {
1915: if ($hostname ne '') {
1916: $src = 'http://'.$hostname.$src;
1917: }
1918: }
1919: }
1920: if (defined($anchor)) { $anchor='#'.$anchor; }
1921: if (($args->{'caller'} eq 'sequence') && ($curRes->is_map())) {
1922: $args->{"resourceLink"} = $src.($srcHasQuestion?'&':'?') .'navmap=1';
1923: } else {
1924: $args->{"resourceLink"} = $src.
1925: ($srcHasQuestion?'&':'?') .
1926: 'symb=' . &escape($symb).$inhibitmenu.$anchor;
1927: }
1928: }
1929: # Now, we've decided what parts to show. Loop through them and
1930: # show them.
1931: foreach my $part (@parts) {
1932: $rownum ++;
1933:
1934: $result .= &Apache::loncommon::start_data_table_row();
1935:
1936: # Set up some data about the parts that the cols might want
1937: my $filter = $it->{FILTER};
1938:
1939: # Now, display each column.
1940: foreach my $col (@$cols) {
1941: my $colHTML = '';
1942: if (ref($col)) {
1943: $colHTML .= &$col($curRes, $part, $args);
1944: } else {
1945: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1946: }
1947:
1948: # If this is the first column and it's time to print
1949: # the anchor, do so
1950: if ($col == $cols->[0] &&
1951: $args->{'counter'} == $args->{'currentJumpIndex'} -
1952: $currentJumpDelta) {
1953: # Jam the anchor after the <td> tag;
1954: # necessary for valid HTML (which Mozilla requires)
1955: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1956: $displayedJumpMarker = 1;
1957: }
1958: $result .= $colHTML . "\n";
1959: }
1960: $result .= &Apache::loncommon::end_data_table_row();
1961: $args->{'isNewBranch'} = 0;
1962: }
1963:
1964: if ($r && $rownum % 20 == 0) {
1965: $r->print($result);
1966: $result = "";
1967: $r->rflush();
1968: }
1969: } continue {
1970: if ($r) {
1971: # If we have the connection, make sure the user is still connected
1972: my $c = $r->connection;
1973: if ($c->aborted()) {
1974: # Who cares what we do, nobody will see it anyhow.
1975: return '';
1976: }
1977: }
1978: }
1979:
1980: $result.=&Apache::loncommon::end_data_table();
1981:
1982: # Print out the part that jumps to #curloc if it exists
1983: # delay needed because the browser is processing the jump before
1984: # it finishes rendering, so it goes to the wrong place!
1985: # onload might be better, but this routine has no access to that.
1986: # On mozilla, the 0-millisecond timeout seems to prevent this;
1987: # it's quite likely this might fix other browsers, too, and
1988: # certainly won't hurt anything.
1989: if ($displayedJumpMarker) {
1990: $result .= &Apache::lonhtmlcommon::scripttag("
1991: if (location.href.indexOf('#curloc')==-1) {
1992: setTimeout(\"location += '#curloc';\", 0)
1993: }
1994: ");
1995: }
1996:
1997: if ($r) {
1998: $r->print($result);
1999: $result = "";
2000: $r->rflush();
2001: }
2002:
2003: return $result;
2004: }
2005:
2006: sub add_linkitem {
2007: my ($linkitems,$name,$cmd,$text)=@_;
2008: $$linkitems{$name}{'cmd'}=$cmd;
2009: $$linkitems{$name}{'text'}=&mt($text);
2010: }
2011:
2012: sub show_linkitems_toolbar {
2013: my ($args,$condition) = @_;
2014: my $result;
2015: if (ref($args) eq 'HASH') {
2016: if (ref($args->{'linkitems'}) eq 'HASH') {
2017: my $numlinks = scalar(keys(%{$args->{'linkitems'}}));
2018: if ($numlinks > 1) {
2019: $result = '<td>'.
2020: &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',
2021: undef,'RAT').
2022: '</td>'.
2023: '<td> </td>'.
2024: '<td class="LC_middle">'.&mt('Tools:').'</td>';
2025: }
2026: $result .= '<td align="left">'."\n".
2027: '<ul id="LC_toolbar">';
2028: my @linkorder = ('firsthomework','everything','uncompleted',
2029: 'changefolder','clearbubbles','edittoplevel');
2030: foreach my $link (@linkorder) {
2031: if (ref($args->{'linkitems'}{$link}) eq 'HASH') {
2032: if ($args->{'linkitems'}{$link}{'text'} ne '') {
2033: $args->{'linkitems'}{$link}{'cmd'}=~s/"/'/g;
2034: if ($args->{'linkitems'}{$link}{'cmd'}) {
2035: my $link_id = 'LC_content_toolbar_'.$link;
2036: if ($link eq 'changefolder') {
2037: if ($condition) {
2038: $link_id='LC_content_toolbar_changefolder_toggled';
2039: } else {
2040: $link_id='LC_content_toolbar_changefolder';
2041: }
2042: }
2043: $result .= '<li><a href="#" '.
2044: 'onclick="'.$args->{'linkitems'}{$link}{'cmd'}.'" '.
2045: 'id="'.$link_id.'" '.
2046: 'class="LC_toolbarItem" '.
2047: 'title="'.$args->{'linkitems'}{$link}{'text'}.'">'.
2048: '</a></li>'."\n";
2049: }
2050: }
2051: }
2052: }
2053: $result .= '</ul>'.
2054: '</td>';
2055: if (($numlinks==1) && (exists($args->{'linkitems'}{'edittoplevel'}))) {
2056: $result .= '<td><a href="'.$args->{'linkitems'}{'edittoplevel'}{'cmd'}.'">'.
2057: &mt('Content Editor').'</a></td>';
2058: }
2059: }
2060: if ($args->{'sort_html'}) {
2061: $result .= '<td> </td><td> </td><td> </td>'.
2062: '<td align="right">'.$args->{'sort_html'}.'</td>';
2063: }
2064: }
2065: if ($result) {
2066: $result = "<table><tr>$result</tr></table>";
2067: }
2068: return $result;
2069: }
2070:
2071: 1;
2072:
2073:
2074:
2075:
2076:
2077:
2078:
2079:
2080:
2081: package Apache::lonnavmaps::navmap;
2082:
2083: =pod
2084:
2085: =head1 Object: Apache::lonnavmaps::navmap
2086:
2087: =head2 Overview
2088:
2089: The navmap object's job is to provide access to the resources
2090: in the course as Apache::lonnavmaps::resource objects, and to
2091: query and manage the relationship between those resource objects.
2092:
2093: Generally, you'll use the navmap object in one of three basic ways.
2094: In order of increasing complexity and power:
2095:
2096: =over 4
2097:
2098: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
2099: various ways to obtain resource objects, based on various identifiers.
2100: Use this when you want to request information about one object or
2101: a handful of resources you already know the identities of, from some
2102: other source. For more about Ids, Symbs, and MapPcs, see the
2103: Resource documentation. Note that Url should be a B<last resort>,
2104: not your first choice; it only really works when there is only one
2105: instance of the resource in the course, which only applies to
2106: maps, and even that may change in the future (see the B<getResourceByUrl>
2107: documentation for more details.)
2108:
2109: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
2110: retrieves resources matching some criterion and returns them
2111: in a flat array, with no structure information. Use this when
2112: you are manipulating a series of resources, based on what map
2113: the are in, but do not care about branching, or exactly how
2114: the maps and resources are related. This is the most common case.
2115:
2116: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
2117: the course's navmap in various ways without writing the traversal
2118: code yourself. See iterator documentation below. Use this when
2119: you need to know absolutely everything about the course, including
2120: branches and the precise relationship between maps and resources.
2121:
2122: =back
2123:
2124: =head2 Creation And Destruction
2125:
2126: To create a navmap object, use the following function:
2127:
2128: =over 4
2129:
2130: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
2131:
2132: Creates a new navmap object. Returns the navmap object if this is
2133: successful, or B<undef> if not.
2134:
2135: =back
2136:
2137: =head2 Methods
2138:
2139: =over 4
2140:
2141: =item * B<getIterator>(first, finish, filter, condition):
2142:
2143: See iterator documentation below.
2144:
2145: =cut
2146:
2147: use strict;
2148: use GDBM_File;
2149: use Apache::lonnet;
2150: use LONCAPA;
2151:
2152: sub new {
2153: # magic invocation to create a class instance
2154: my $proto = shift;
2155: my $class = ref($proto) || $proto;
2156: my $self = {};
2157: bless($self); # So we can call change_user if necessary
2158:
2159: $self->{USERNAME} = shift || $env{'user.name'};
2160: $self->{DOMAIN} = shift || $env{'user.domain'};
2161: $self->{CODE} = shift;
2162: $self->{NOHIDE} = shift;
2163:
2164:
2165:
2166: # Resource cache stores navmap resources as we reference them. We generate
2167: # them on-demand so we don't pay for creating resources unless we use them.
2168: $self->{RESOURCE_CACHE} = {};
2169:
2170: # Network failure flag, if we accessed the course or user opt and
2171: # failed
2172: $self->{NETWORK_FAILURE} = 0;
2173:
2174: # We can only tie the nav hash as done below if the username/domain
2175: # match the env one. Otherwise change_user does everything we need...since we can't
2176: # assume there are course hashes for the specific requested user:domain
2177: # Note: change_user is also called if we need the nav hash when printing CODEd
2178: # assignments or printing an exam, in which the enclosing folder for the items in
2179: # the exam has hidden set.
2180: #
2181:
2182: if (($self->{USERNAME} eq $env{'user.name'}) && ($self->{DOMAIN} eq $env{'user.domain'}) &&
2183: !$self->{CODE} && !$self->{NOHIDE}) {
2184:
2185: # tie the nav hash
2186:
2187: my %navmaphash;
2188: my %parmhash;
2189: my $courseFn = $env{"request.course.fn"};
2190: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
2191: &GDBM_READER(), 0640))) {
2192: return undef;
2193: }
2194:
2195: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
2196: &GDBM_READER(), 0640)))
2197: {
2198: untie %{$self->{PARM_HASH}};
2199: return undef;
2200: }
2201:
2202: $self->{NAV_HASH} = \%navmaphash;
2203: $self->{PARM_HASH} = \%parmhash;
2204: $self->{PARM_CACHE} = {};
2205: } else {
2206: $self->change_user($self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE});
2207: }
2208:
2209: return $self;
2210: }
2211:
2212: #
2213: # In some instances it is useful to be able to dynamically change the
2214: # username/domain associated with a navmap (e.g. to navigate for someone
2215: # else besides the current user...if sufficiently privileged.
2216: # Parameters:
2217: # user - New user.
2218: # domain- Domain the user belongs to.
2219: # code - Anonymous CODE in use.
2220: # Implicit inputs:
2221: #
2222: sub change_user {
2223: my $self = shift;
2224: $self->{USERNAME} = shift;
2225: $self->{DOMAIN} = shift;
2226: $self->{CODE} = shift;
2227: $self->{NOHIDE} = shift;
2228:
2229: # If the hashes are already tied make sure to break that bond:
2230:
2231: untie %{$self->{NAV_HASH}};
2232: untie %{$self->{PARM_HASH}};
2233:
2234: # The assumption is that we have to
2235: # use lonmap here to re-read the hash and from it reconstruct
2236: # new big and parameter hashes. An implicit assumption at this time
2237: # is that the course file is probably not created locally yet
2238: # an that we will therefore just read without tying.
2239:
2240: my ($cdom, $cnum) = split(/\_/, $env{'request.course.id'});
2241:
2242: my %big_hash;
2243: &Apache::lonmap::loadmap($cnum, $cdom, $self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE}, \%big_hash);
2244: $self->{NAV_HASH} = \%big_hash;
2245:
2246:
2247:
2248: # Now clear the parm cache and reconstruct the parm hash from the big_hash
2249: # param.xxxx keys.
2250:
2251: $self->{PARM_CACHE} = {};
2252:
2253: my %parm_hash = {};
2254: foreach my $key (keys(%big_hash)) {
2255: if ($key =~ /^param\./) {
2256: my $param_key = $key;
2257: $param_key =~ s/^param\.//;
2258: $parm_hash{$param_key} = $big_hash{$key};
2259: }
2260: }
2261:
2262: $self->{PARM_HASH} = \%parm_hash;
2263:
2264: }
2265:
2266: sub generate_course_user_opt {
2267: my $self = shift;
2268: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
2269:
2270: my $uname=$self->{USERNAME};
2271: my $udom=$self->{DOMAIN};
2272:
2273: my $cid=$env{'request.course.id'};
2274: my $cdom=$env{'course.'.$cid.'.domain'};
2275: my $cnum=$env{'course.'.$cid.'.num'};
2276:
2277: # ------------------------------------------------- Get coursedata (if present)
2278: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
2279: # Check for network failure
2280: if (!ref($courseopt)) {
2281: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
2282: $self->{NETWORK_FAILURE} = 1;
2283: }
2284: undef($courseopt);
2285: }
2286:
2287: # --------------------------------------------------- Get userdata (if present)
2288:
2289: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
2290: # Check for network failure
2291: if (!ref($useropt)) {
2292: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
2293: $self->{NETWORK_FAILURE} = 1;
2294: }
2295: undef($useropt);
2296: }
2297:
2298: $self->{COURSE_OPT} = $courseopt;
2299: $self->{USER_OPT} = $useropt;
2300:
2301: $self->{COURSE_USER_OPT_GENERATED} = 1;
2302:
2303: return;
2304: }
2305:
2306:
2307:
2308: sub generate_email_discuss_status {
2309: my $self = shift;
2310: my $symb = shift;
2311: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
2312:
2313: my $cid=$env{'request.course.id'};
2314: my $cdom=$env{'course.'.$cid.'.domain'};
2315: my $cnum=$env{'course.'.$cid.'.num'};
2316:
2317: my %emailstatus = &Apache::lonnet::dump('email_status',$self->{DOMAIN},$self->{USERNAME});
2318: my $logoutTime = $emailstatus{'logout'};
2319: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
2320: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2321: $courseLeaveTime : $logoutTime);
2322: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2323: $cdom, $cnum);
2324: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
2325: $self->{DOMAIN},$self->{USERNAME},'lastread');
2326: my %lastreadtime = ();
2327: foreach my $key (keys(%lastread)) {
2328: my $shortkey = $key;
2329: $shortkey =~ s/_lastread$//;
2330: $lastreadtime{$shortkey} = $lastread{$key};
2331: }
2332:
2333: my %feedback=();
2334: my %error=();
2335: my @keys = &Apache::lonnet::getkeys('nohist_email',$self->{DOMAIN},
2336: $self->{USERNAME});
2337:
2338: foreach my $msgid (@keys) {
2339: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
2340: my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
2341: $symb,$error) = &Apache::lonmsg::unpackmsgid(&LONCAPA::escape($msgid));
2342: &Apache::lonenc::check_decrypt(\$symb);
2343: if (($fromcid ne '') && ($fromcid ne $cid)) {
2344: next;
2345: }
2346: if (defined($symb)) {
2347: if (defined($error) && $error == 1) {
2348: $error{$symb}.=','.$msgid;
2349: } else {
2350: $feedback{$symb}.=','.$msgid;
2351: }
2352: } else {
2353: my $plain=
2354: &LONCAPA::unescape(&LONCAPA::unescape($msgid));
2355: if ($plain=~/ \[([^\]]+)\]\:/) {
2356: my $url=$1;
2357: if ($plain=~/\:Error \[/) {
2358: $error{$url}.=','.$msgid;
2359: } else {
2360: $feedback{$url}.=','.$msgid;
2361: }
2362: }
2363: }
2364: }
2365: }
2366:
2367: #symbs of resources that have feedbacks (will be urls pre-2.3)
2368: $self->{FEEDBACK} = \%feedback;
2369: #or errors (will be urls pre 2.3)
2370: $self->{ERROR_MSG} = \%error;
2371: $self->{DISCUSSION_TIME} = \%discussiontime;
2372: $self->{EMAIL_STATUS} = \%emailstatus;
2373: $self->{LAST_READ} = \%lastreadtime;
2374:
2375: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2376: }
2377:
2378: sub get_user_data {
2379: my $self = shift;
2380: if ($self->{RETRIEVED_USER_DATA}) { return; }
2381:
2382: # Retrieve performance data on problems
2383: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
2384: $self->{DOMAIN},
2385: $self->{USERNAME});
2386: $self->{STUDENT_DATA} = \%student_data;
2387:
2388: $self->{RETRIEVED_USER_DATA} = 1;
2389: }
2390:
2391: sub get_discussion_data {
2392: my $self = shift;
2393: if ($self->{RETRIEVED_DISCUSSION_DATA}) {
2394: return $self->{DISCUSSION_DATA};
2395: }
2396:
2397: $self->generate_email_discuss_status();
2398:
2399: my $cid=$env{'request.course.id'};
2400: my $cdom=$env{'course.'.$cid.'.domain'};
2401: my $cnum=$env{'course.'.$cid.'.num'};
2402: # Retrieve discussion data for resources in course
2403: my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
2404:
2405:
2406: $self->{DISCUSSION_DATA} = \%discussion_data;
2407: $self->{RETRIEVED_DISCUSSION_DATA} = 1;
2408: return $self->{DISCUSSION_DATA};
2409: }
2410:
2411:
2412: # Internal function: Takes a key to look up in the nav hash and implements internal
2413: # memory caching of that key.
2414: sub navhash {
2415: my $self = shift; my $key = shift;
2416: return $self->{NAV_HASH}->{$key};
2417: }
2418:
2419: =pod
2420:
2421: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2422: false otherwise. Undefined course maps indicate an error somewhere in
2423: LON-CAPA, and you will not be able to proceed with using the navmap.
2424: See the B<NAV> screen for an example of using this.
2425:
2426: =cut
2427:
2428: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2429: sub courseMapDefined {
2430: my $self = shift;
2431: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
2432:
2433: my $firstres = $self->navhash("map_start_$uri");
2434: my $lastres = $self->navhash("map_finish_$uri");
2435: return $firstres && $lastres;
2436: }
2437:
2438: sub getIterator {
2439: my $self = shift;
2440: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
2441: shift, undef, shift,
2442: shift, shift);
2443: return $iterator;
2444: }
2445:
2446: # Private method: Does the given resource (as a symb string) have
2447: # current discussion? Returns 0 if chat/mail data not extracted.
2448: sub hasDiscussion {
2449: my $self = shift;
2450: my $symb = shift;
2451: $self->generate_email_discuss_status();
2452:
2453: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2454:
2455: #return defined($self->{DISCUSSION_TIME}->{$symb});
2456:
2457: # backward compatibility (bulletin boards used to be 'wrapped')
2458: my $ressymb = $self->wrap_symb($symb);
2459: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2460: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2461: } else {
2462: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2463: return $self->{DISCUSSION_TIME}->{$ressymb} > 0; # in 1.2 will display speech bubble icons for all items with posts until marked as read (even if read in v 1.1).
2464: }
2465: }
2466:
2467: sub last_post_time {
2468: my $self = shift;
2469: my $symb = shift;
2470: my $ressymb = $self->wrap_symb($symb);
2471: return $self->{DISCUSSION_TIME}->{$ressymb};
2472: }
2473:
2474: sub discussion_info {
2475: my $self = shift;
2476: my $symb = shift;
2477: my $filter = shift;
2478:
2479: $self->get_discussion_data();
2480:
2481: my $ressymb = $self->wrap_symb($symb);
2482: # keys used to store bulletinboard postings use 'unwrapped' symb.
2483: my $discsymb = &escape($self->unwrap_symb($ressymb));
2484: my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
2485: if (!$version) { return; }
2486:
2487: my $prevread = $self->{LAST_READ}{$ressymb};
2488:
2489: my $count = 0;
2490: my $hiddenflag = 0;
2491: my $deletedflag = 0;
2492: my ($hidden,$deleted,%info);
2493:
2494: for (my $id=$version; $id>0; $id--) {
2495: my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
2496: my @keys=split(/:/,$vkeys);
2497: if (grep(/^hidden$/ ,@keys)) {
2498: if (!$hiddenflag) {
2499: $hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
2500: $hiddenflag = 1;
2501: }
2502: } elsif (grep(/^deleted$/,@keys)) {
2503: if (!$deletedflag) {
2504: $deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
2505: $deletedflag = 1;
2506: }
2507: } else {
2508: if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
2509: if ($filter eq 'unread') {
2510: if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
2511: next;
2512: }
2513: }
2514: $count++;
2515: $info{$count}{'subject'} =
2516: $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
2517: $info{$count}{'id'} = $id;
2518: $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
2519: }
2520: }
2521: }
2522: if (wantarray) {
2523: return ($count,%info);
2524: }
2525: return $count;
2526: }
2527:
2528: sub wrap_symb {
2529: my $self = shift;
2530: my $symb = shift;
2531: if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
2532: unless ($symb =~ m|adm/wrapper/adm|) {
2533: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
2534: }
2535: }
2536: return $symb;
2537: }
2538:
2539: sub unwrap_symb {
2540: my $self = shift;
2541: my $ressymb = shift;
2542: my $discsymb = $ressymb;
2543: if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
2544: $discsymb = $1.$2;
2545: }
2546: return $discsymb;
2547: }
2548:
2549: # Private method: Does the given resource (as a symb string) have
2550: # current feedback? Returns the string in the feedback hash, which
2551: # will be false if it does not exist.
2552:
2553: sub getFeedback {
2554: my $self = shift;
2555: my $symb = shift;
2556: my $source = shift;
2557:
2558: $self->generate_email_discuss_status();
2559:
2560: if (!defined($self->{FEEDBACK})) { return ""; }
2561:
2562: my $feedback;
2563: if ($self->{FEEDBACK}->{$symb}) {
2564: $feedback = $self->{FEEDBACK}->{$symb};
2565: if ($self->{FEEDBACK}->{$source}) {
2566: $feedback .= ','.$self->{FEEDBACK}->{$source};
2567: }
2568: } else {
2569: if ($self->{FEEDBACK}->{$source}) {
2570: $feedback = $self->{FEEDBACK}->{$source};
2571: }
2572: }
2573: return $feedback;
2574: }
2575:
2576: # Private method: Get the errors for that resource (by source).
2577: sub getErrors {
2578: my $self = shift;
2579: my $symb = shift;
2580: my $src = shift;
2581:
2582: $self->generate_email_discuss_status();
2583:
2584: if (!defined($self->{ERROR_MSG})) { return ""; }
2585:
2586: my $errors;
2587: if ($self->{ERROR_MSG}->{$symb}) {
2588: $errors = $self->{ERROR_MSG}->{$symb};
2589: if ($self->{ERROR_MSG}->{$src}) {
2590: $errors .= ','.$self->{ERROR_MSG}->{$src};
2591: }
2592: } else {
2593: if ($self->{ERROR_MSG}->{$src}) {
2594: $errors = $self->{ERROR_MSG}->{$src};
2595: }
2596: }
2597: return $errors;
2598: }
2599:
2600: =pod
2601:
2602: =item * B<getById>(id):
2603:
2604: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2605: object for that resource. This method, or other methods that use it
2606: (as in the resource object) is the only proper way to obtain a
2607: resource object.
2608:
2609: =item * B<getBySymb>(symb):
2610:
2611: Based on the symb of the resource, get a resource object for that
2612: resource. This is one of the proper ways to get a resource object.
2613:
2614: =item * B<getByMapPc>(map_pc):
2615:
2616: Based on the map_pc of the resource, get a resource object for
2617: the given map. This is one of the proper ways to get a resource object.
2618:
2619: =cut
2620:
2621: # The strategy here is to cache the resource objects, and only construct them
2622: # as we use them. The real point is to prevent reading any more from the tied
2623: # hash than we have to, which should hopefully alleviate speed problems.
2624:
2625: sub getById {
2626: my $self = shift;
2627: my $id = shift;
2628:
2629: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2630: {
2631: return $self->{RESOURCE_CACHE}->{$id};
2632: }
2633:
2634: # resource handles inserting itself into cache.
2635: # Not clear why the quotes are necessary, but as of this
2636: # writing it doesn't work without them.
2637: return "Apache::lonnavmaps::resource"->new($self, $id);
2638: }
2639:
2640: sub getBySymb {
2641: my $self = shift;
2642: my $symb = shift;
2643:
2644: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
2645: my $map = $self->getResourceByUrl($mapUrl);
2646: my $returnvalue = undef;
2647: if (ref($map)) {
2648: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2649: }
2650: return $returnvalue;
2651: }
2652:
2653: sub getByMapPc {
2654: my $self = shift;
2655: my $map_pc = shift;
2656: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2657: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2658: return $self->getById($map_id);
2659: }
2660:
2661: =pod
2662:
2663: =item * B<firstResource>():
2664:
2665: Returns a resource object reference corresponding to the first
2666: resource in the navmap.
2667:
2668: =cut
2669:
2670: sub firstResource {
2671: my $self = shift;
2672: my $firstResource = $self->navhash('map_start_' .
2673: &Apache::lonnet::clutter($env{'request.course.uri'}));
2674: return $self->getById($firstResource);
2675: }
2676:
2677: =pod
2678:
2679: =item * B<finishResource>():
2680:
2681: Returns a resource object reference corresponding to the last resource
2682: in the navmap.
2683:
2684: =cut
2685:
2686: sub finishResource {
2687: my $self = shift;
2688: my $firstResource = $self->navhash('map_finish_' .
2689: &Apache::lonnet::clutter($env{'request.course.uri'}));
2690: return $self->getById($firstResource);
2691: }
2692:
2693: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2694: # the actual lookup; parmval caches the results.
2695: sub parmval {
2696: my $self = shift;
2697: my ($what,$symb,$recurse)=@_;
2698: my $hashkey = $what."|||".$symb;
2699: my $cache = $self->{PARM_CACHE};
2700: if (defined($self->{PARM_CACHE}->{$hashkey})) {
2701: if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {
2702: if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {
2703: if (wantarray) {
2704: return @{$self->{PARM_CACHE}->{$hashkey}};
2705: } else {
2706: return $self->{PARM_CACHE}->{$hashkey}->[0];
2707: }
2708: }
2709: } else {
2710: return $self->{PARM_CACHE}->{$hashkey};
2711: }
2712: }
2713:
2714: my $result = $self->parmval_real($what, $symb, $recurse);
2715: $self->{PARM_CACHE}->{$hashkey} = $result;
2716: if (wantarray) {
2717: return @{$result};
2718: }
2719: return $result->[0];
2720: }
2721:
2722:
2723: sub parmval_real {
2724: my $self = shift;
2725: my ($what,$symb,$recurse) = @_;
2726:
2727:
2728: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2729: $self->generate_course_user_opt();
2730:
2731: my $cid=$env{'request.course.id'};
2732: my $csec=$env{'request.course.sec'};
2733: my $cgroup='';
2734: my @cgrps=split(/:/,$env{'request.course.groups'});
2735: if (@cgrps > 0) {
2736: @cgrps = sort(@cgrps);
2737: $cgroup = $cgrps[0];
2738: }
2739: my $uname=$self->{USERNAME};
2740: my $udom=$self->{DOMAIN};
2741:
2742: unless ($symb) { return ['']; }
2743: my $result='';
2744:
2745: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
2746: $mapname = &Apache::lonnet::deversion($mapname);
2747: my $toolsymb = '';
2748: if ($fn =~ /ext\.tool$/) {
2749: $toolsymb = $symb;
2750: }
2751: my ($recursed,@recurseup);
2752:
2753: # ----------------------------------------------------- Cascading lookup scheme
2754: my $rwhat=$what;
2755: $what=~s/^parameter\_//;
2756: $what=~s/\_/\./;
2757:
2758: my $symbparm=$symb.'.'.$what;
2759: my $recurseparm=$mapname.'___(rec).'.$what;
2760: my $mapparm=$mapname.'___(all).'.$what;
2761: my $usercourseprefix=$cid;
2762:
2763:
2764:
2765: my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
2766: my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
2767: my $grpleveli=$usercourseprefix.'.['.$cgroup.'].'.$recurseparm;
2768: my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
2769:
2770:
2771: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2772: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2773: my $secleveli=$usercourseprefix.'.['.$csec.'].'.$recurseparm;
2774: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2775:
2776:
2777: my $courselevel= $usercourseprefix.'.'.$what;
2778: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2779: my $courseleveli=$usercourseprefix.'.'.$recurseparm;
2780: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2781:
2782:
2783: my $useropt = $self->{USER_OPT};
2784: my $courseopt = $self->{COURSE_OPT};
2785: my $parmhash = $self->{PARM_HASH};
2786:
2787: # ---------------------------------------------------------- first, check user
2788: if ($uname and defined($useropt)) {
2789: if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }
2790: if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }
2791: if (defined($$useropt{$courseleveli})) { return [$$useropt{$courseleveli},'map']; }
2792: unless ($recursed) {
2793: @recurseup = $self->recurseup_maps($mapname);
2794: $recursed = 1;
2795: }
2796: foreach my $item (@recurseup) {
2797: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2798: if (defined($$useropt{$norecursechk})) {
2799: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2800: return [$$useropt{$norecursechk},'map'];
2801: } else {
2802: last;
2803: }
2804: }
2805: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
2806: if (defined($$useropt{$recursechk})) { return [$$useropt{$recursechk},'map']; }
2807: }
2808: if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }
2809: }
2810:
2811: # ------------------------------------------------------- second, check course
2812: if ($cgroup ne '' and defined($courseopt)) {
2813: if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }
2814: if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }
2815: if (defined($$courseopt{$grpleveli})) { return [$$courseopt{$grpleveli},'map']; }
2816: unless ($recursed) {
2817: @recurseup = $self->recurseup_maps($mapname);
2818: $recursed = 1;
2819: }
2820: foreach my $item (@recurseup) {
2821: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
2822: if (defined($$courseopt{$norecursechk})) {
2823: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2824: return [$$courseopt{$norecursechk},'map'];
2825: } else {
2826: last;
2827: }
2828: }
2829: my $recursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(rec).'.$what;
2830: if (defined($$courseopt{$recursechk})) { return [$$courseopt{$recursechk},'map']; }
2831: }
2832: if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }
2833: }
2834:
2835: if ($csec ne '' and defined($courseopt)) {
2836: if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }
2837: if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }
2838: if (defined($$courseopt{$secleveli})) { return [$$courseopt{$secleveli},'map']; }
2839: unless ($recursed) {
2840: @recurseup = $self->recurseup_maps($mapname);
2841: $recursed = 1;
2842: }
2843: foreach my $item (@recurseup) {
2844: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
2845: if (defined($$courseopt{$norecursechk})) {
2846: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2847: return [$$courseopt{$norecursechk},'map'];
2848: } else {
2849: last;
2850: }
2851: }
2852: my $recursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(rec).'.$what;
2853: if (defined($$courseopt{$recursechk})) { return [$$courseopt{$recursechk},'map']; }
2854: }
2855: if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }
2856: }
2857:
2858: if (defined($courseopt)) {
2859: if (defined($$courseopt{$courselevelr})) { return [$$courseopt{$courselevelr},'resource']; }
2860: }
2861:
2862: # ----------------------------------------------------- third, check map parms
2863:
2864: my $thisparm=$$parmhash{$symbparm};
2865: if (defined($thisparm)) { return [$thisparm,'map']; }
2866:
2867: # ----------------------------------------------------- fourth , check default
2868:
2869: my $meta_rwhat=$rwhat;
2870: $meta_rwhat=~s/\./_/g;
2871: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat,$toolsymb);
2872: if (defined($default)) { return [$default,'resource']}
2873: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat,$toolsymb);
2874: if (defined($default)) { return [$default,'resource']}
2875: # --------------------------------------------------- fifth, check more course
2876: if (defined($courseopt)) {
2877: if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }
2878: if (defined($$courseopt{$courseleveli})) { return [$$courseopt{$courseleveli},'map']; }
2879: unless ($recursed) {
2880: @recurseup = $self->recurseup_maps($mapname);
2881: $recursed = 1;
2882: }
2883: foreach my $item (@recurseup) {
2884: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2885: if (defined($$courseopt{$norecursechk})) {
2886: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2887: return [$$courseopt{$norecursechk},'map'];
2888: } else {
2889: last;
2890: }
2891: }
2892: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
2893: if (defined($$courseopt{$recursechk})) {
2894: return [$$courseopt{$recursechk},'map'];
2895: }
2896: }
2897: if (defined($$courseopt{$courselevel})) {
2898: my $ret = [$$courseopt{$courselevel},'course'];
2899: return $ret;
2900: }
2901: }
2902: # --------------------------------------------------- sixth , cascade up parts
2903:
2904: my ($space,@qualifier)=split(/\./,$rwhat);
2905: my $qualifier=join('.',@qualifier);
2906: unless ($space eq '0') {
2907: my @parts=split(/_/,$space);
2908: my $id=pop(@parts);
2909: my $part=join('_',@parts);
2910: if ($part eq '') { $part='0'; }
2911: my @partgeneral=$self->parmval($part.".$qualifier",$symb,1);
2912: if (defined($partgeneral[0])) { return \@partgeneral; }
2913: }
2914: if ($recurse) { return []; }
2915: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat,$toolsymb);
2916: if (defined($pack_def)) { return [$pack_def,'resource']; }
2917: return [''];
2918: }
2919:
2920: sub recurseup_maps {
2921: my ($self,$mapname) = @_;
2922: my @recurseup;
2923: if ($mapname) {
2924: my $res = $self->getResourceByUrl($mapname);
2925: if (ref($res)) {
2926: my @pcs = split(/,/,$res->map_hierarchy());
2927: shift(@pcs);
2928: if (@pcs) {
2929: @recurseup = map { &Apache::lonnet::declutter($self->getByMapPc($_)->src()); } reverse(@pcs);
2930: }
2931: }
2932: }
2933: return @recurseup;
2934: }
2935:
2936: sub recursed_crumbs {
2937: my ($self,$mapurl,$restitle) = @_;
2938: my (@revmapinfo,@revmapres);
2939: my $mapres = $self->getResourceByUrl($mapurl);
2940: if (ref($mapres)) {
2941: @revmapres = map { $self->getByMapPc($_); } split(/,/,$mapres->map_breadcrumbs());
2942: shift(@revmapres);
2943: }
2944: my $allowedlength = 60;
2945: my $minlength = 5;
2946: my $allowedtitle = 30;
2947: if (($env{'environment.icons'} eq 'iconsonly') && (!$env{'browser.mobile'})) {
2948: $allowedlength = 100;
2949: $allowedtitle = 70;
2950: }
2951: if (length($restitle) > $allowedtitle) {
2952: $restitle = &truncate_crumb_text($restitle,$allowedtitle);
2953: }
2954: my $totallength = length($restitle);
2955: my @links;
2956:
2957: foreach my $map (@revmapres) {
2958: my $pc = $map->map_pc();
2959: next if ((!$pc) || ($pc == 1));
2960: push(@links,$map);
2961: push(@revmapinfo,{'href' => $map->link().'?navmap=1','text' => $map->title(),'no_mt' => 1,});
2962: $totallength += length($map->title());
2963: }
2964: my $numlinks = scalar(@links);
2965: if ($numlinks) {
2966: if ($totallength - $allowedlength > 0) {
2967: my $available = $allowedlength - length($restitle);
2968: my $avg = POSIX::ceil($available/$numlinks);
2969: if ($avg < $minlength) {
2970: $avg = $minlength;
2971: }
2972: @revmapinfo = ();
2973: foreach my $map (@links) {
2974: my $showntitle = &truncate_crumb_text($map->title(),$avg);
2975: if ($showntitle ne '') {
2976: push(@revmapinfo,{'href' => $map->link().'?navmap=1','text' => $showntitle,'no_mt' => 1,});
2977: }
2978: }
2979: }
2980: }
2981: if ($restitle ne '') {
2982: push(@revmapinfo,{'text' => $restitle, 'no_mt' => 1});
2983: }
2984: return @revmapinfo;
2985: }
2986:
2987: sub truncate_crumb_text {
2988: my ($title,$limit) = @_;
2989: my $showntitle = '';
2990: if (length($title) > $limit) {
2991: my @words = split(/\b\s*/,$title);
2992: if (@words == 1) {
2993: $showntitle = substr($title,0,$limit).' ...';
2994: } else {
2995: my $linklength = 0;
2996: my $num = 0;
2997: foreach my $word (@words) {
2998: $linklength += 1+length($word);
2999: if ($word eq '-') {
3000: $showntitle =~ s/ $//;
3001: $showntitle .= $word;
3002: } elsif ($linklength > $limit) {
3003: if ($num < @words) {
3004: $showntitle .= $word.' ...';
3005: last;
3006: } else {
3007: $showntitle .= $word;
3008: }
3009: } else {
3010: $showntitle .= $word.' ';
3011: }
3012: }
3013: $showntitle =~ s/ $//;
3014: }
3015: return $showntitle;
3016: } else {
3017: return $title;
3018: }
3019: }
3020:
3021: #
3022: # Determines the open/close dates for printing a map that
3023: # encloses a resource.
3024: #
3025: sub map_printdates {
3026: my ($self, $res, $part) = @_;
3027:
3028:
3029:
3030:
3031:
3032: my $opendate = $self->get_mapparam($res->symb(),'',"$part.printstartdate");
3033: my $closedate= $self->get_mapparam($res->symb(),'',"$part.printenddate");
3034:
3035:
3036: return ($opendate, $closedate);
3037: }
3038:
3039: sub get_mapparam {
3040: my ($self, $symb, $mapname, $what) = @_;
3041:
3042: # Ensure the course option hash is populated:
3043:
3044: $self->generate_course_user_opt();
3045:
3046: # Get the course id and section if there is one.
3047:
3048: my $cid=$env{'request.course.id'};
3049: my $csec=$env{'request.course.sec'};
3050: my $cgroup='';
3051: my @cgrps=split(/:/,$env{'request.course.groups'});
3052: if (@cgrps > 0) {
3053: @cgrps = sort(@cgrps);
3054: $cgroup = $cgrps[0];
3055: }
3056: my $uname=$self->{USERNAME};
3057: my $udom=$self->{DOMAIN};
3058:
3059: unless ($symb || $mapname) { return; }
3060: my $result='';
3061: my ($recursed,@recurseup);
3062:
3063:
3064: # Figure out which map we are in.
3065:
3066: if ($symb && !$mapname) {
3067: my ($id,$fn);
3068: ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
3069: $mapname = &Apache::lonnet::deversion($mapname);
3070: }
3071:
3072:
3073: my $rwhat=$what;
3074: $what=~s/^parameter\_//;
3075: $what=~s/\_/\./;
3076:
3077: # Build the hash keys for the lookup:
3078:
3079: my $mapparm=$mapname.'___(all).'.$what;
3080: my $recurseparm=$mapname.'___(rec).'.$what;
3081: my $usercourseprefix=$cid;
3082:
3083:
3084: my $grplevelm = "$usercourseprefix.[$cgroup].$mapparm";
3085: my $seclevelm = "$usercourseprefix.[$csec].$mapparm";
3086: my $courselevelm = "$usercourseprefix.$mapparm";
3087:
3088: my $grpleveli = "$usercourseprefix.[$cgroup].$recurseparm";
3089: my $secleveli = "$usercourseprefix.[$csec].$recurseparm";
3090: my $courseleveli = "$usercourseprefix.$recurseparm";
3091:
3092: # Get handy references to the hashes we need in $self:
3093:
3094: my $useropt = $self->{USER_OPT};
3095: my $courseopt = $self->{COURSE_OPT};
3096: my $parmhash = $self->{PARM_HASH};
3097:
3098: # Check per user
3099:
3100:
3101:
3102: if ($uname and defined($useropt)) {
3103: if (defined($$useropt{$courselevelm})) {
3104: return $$useropt{$courselevelm};
3105: }
3106: if (defined($$useropt{$courseleveli})) {
3107: return $$useropt{$courseleveli};
3108: }
3109: unless ($recursed) {
3110: @recurseup = $self->recurseup_maps($mapname);
3111: $recursed = 1;
3112: }
3113: foreach my $item (@recurseup) {
3114: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
3115: if (defined($$useropt{$norecursechk})) {
3116: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3117: return $$useropt{$norecursechk};
3118: } else {
3119: last;
3120: }
3121: }
3122: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
3123: if (defined($$useropt{$recursechk})) {
3124: return $$useropt{$recursechk};
3125: }
3126: }
3127: }
3128:
3129: # Check course -- group
3130:
3131:
3132:
3133: if ($cgroup ne '' and defined ($courseopt)) {
3134: if (defined($$courseopt{$grplevelm})) {
3135: return $$courseopt{$grplevelm};
3136: }
3137: if (defined($$courseopt{$grpleveli})) {
3138: return $$courseopt{$grpleveli};
3139: }
3140: unless ($recursed) {
3141: @recurseup = $self->recurseup_maps($mapname);
3142: $recursed = 1;
3143: }
3144: foreach my $item (@recurseup) {
3145: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
3146: if (defined($$courseopt{$norecursechk})) {
3147: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3148: return $$courseopt{$norecursechk};
3149: } else {
3150: last;
3151: }
3152: }
3153: my $recursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(rec).'.$what;
3154: if (defined($$courseopt{$recursechk})) {
3155: return $$courseopt{$recursechk};
3156: }
3157: }
3158: }
3159:
3160: # Check course -- section
3161:
3162:
3163: if ($csec ne '' and defined($courseopt)) {
3164: if (defined($$courseopt{$seclevelm})) {
3165: return $$courseopt{$seclevelm};
3166: }
3167: if (defined($$courseopt{$secleveli})) {
3168: return $$courseopt{$secleveli};
3169: }
3170: unless ($recursed) {
3171: @recurseup = $self->recurseup_maps($mapname);
3172: $recursed = 1;
3173: }
3174: foreach my $item (@recurseup) {
3175: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
3176: if (defined($$courseopt{$norecursechk})) {
3177: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3178: return $$courseopt{$norecursechk};
3179: } else {
3180: last;
3181: }
3182: }
3183: my $recursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(rec).'.$what;
3184: if (defined($$courseopt{$recursechk})) {
3185: return $$courseopt{$recursechk};
3186: }
3187: }
3188: }
3189: # Check the map parameters themselves:
3190:
3191: if ($symb) {
3192: my $symbparm=$symb.'.'.$what;
3193: my $thisparm = $$parmhash{$symbparm};
3194: if (defined($thisparm)) {
3195: return $thisparm;
3196: }
3197: }
3198:
3199:
3200: # Additional course parameters:
3201:
3202: if (defined($courseopt)) {
3203: if (defined($$courseopt{$courselevelm})) {
3204: return $$courseopt{$courselevelm};
3205: }
3206: unless ($recursed) {
3207: @recurseup = $self->recurseup_maps($mapname);
3208: $recursed = 1;
3209: }
3210: if (@recurseup) {
3211: foreach my $item (@recurseup) {
3212: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
3213: if (defined($$courseopt{$norecursechk})) {
3214: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3215: return $$courseopt{$norecursechk};
3216: } else {
3217: last;
3218: }
3219: }
3220: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
3221: if (defined($$courseopt{$recursechk})) {
3222: return $$courseopt{$recursechk};
3223: }
3224: }
3225: }
3226: }
3227: return undef; # Undefined if we got here.
3228: }
3229:
3230: sub course_printdates {
3231: my ($self, $symb, $part) = @_;
3232:
3233:
3234: my $opendate = $self->getcourseparam($symb, $part . '.printstartdate');
3235: my $closedate = $self->getcourseparam($symb, $part . '.printenddate');
3236: return ($opendate, $closedate);
3237:
3238: }
3239:
3240: sub getcourseparam {
3241: my ($self, $symb, $what) = @_;
3242:
3243: $self->generate_course_user_opt(); # If necessary populate the hashes.
3244:
3245: my $uname = $self->{USERNAME};
3246: my $udom = $self->{DOMAIN};
3247:
3248: # Course, section, group ids come from the env:
3249:
3250: my $cid = $env{'request.course.id'};
3251: my $csec = $env{'request.course.sec'};
3252: my $cgroup = ''; # Assume no group
3253:
3254: my @cgroups = split(/:/, $env{'request.course.groups'});
3255: if(@cgroups > 0) {
3256: @cgroups = sort(@cgroups);
3257: $cgroup = $cgroups[0]; # There is a course group.
3258: }
3259: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
3260: $mapname = &Apache::lonnet::deversion($mapname);
3261:
3262: #
3263: # Make the various lookup keys:
3264: #
3265:
3266: $what=~s/^parameter\_//;
3267: $what=~s/\_/\./;
3268:
3269: # Local refs to the hashes we're going to look at:
3270:
3271: my $useropt = $self->{USER_OPT};
3272: my $courseopt = $self->{COURSE_OPT};
3273:
3274: #
3275: # We want the course level stuff from the way
3276: # parmval_real operates
3277: # TODO: Factor some of this stuff out of
3278: # both parmval_real and here
3279: #
3280: my $courselevel = $cid . '.' . $what;
3281: my $grplevel = $cid . '.[' . $cgroup . ']' . $what;
3282: my $seclevel = $cid . '.[' . $csec . ']' . $what;
3283:
3284:
3285: # Try for the user's course level option:
3286:
3287: if ($uname and defined($useropt)) {
3288: if (defined($$useropt{$courselevel})) {
3289: return $$useropt{$courselevel};
3290: }
3291: }
3292: # Try for the group's course level option:
3293:
3294: if ($cgroup ne '' and defined($courseopt)) {
3295: if (defined($$courseopt{$grplevel})) {
3296: return $$courseopt{$grplevel};
3297: }
3298: }
3299:
3300: # Try for section level parameters:
3301:
3302: if ($csec ne '' and defined($courseopt)) {
3303: if (defined($$courseopt{$seclevel})) {
3304: return $$courseopt{$seclevel};
3305: }
3306: }
3307: # Try for 'additional' course parameters:
3308:
3309: if (defined($courseopt)) {
3310: if (defined($$courseopt{$courselevel})) {
3311: return $$courseopt{$courselevel};
3312: }
3313: }
3314: return undef;
3315:
3316: }
3317:
3318:
3319: =pod
3320:
3321: =item * B<getResourceByUrl>(url,multiple):
3322:
3323: Retrieves a resource object by URL of the resource, unless the optional
3324: multiple parameter is included in which case an array of resource
3325: objects is returned. If passed a resource object, it will simply return
3326: it, so it is safe to use this method in code like
3327: "$res = $navmap->getResourceByUrl($res)"
3328: if you're not sure if $res is already an object, or just a URL. If the
3329: resource appears multiple times in the course, only the first instance
3330: will be returned (useful for maps), unless the multiple parameter has
3331: been included, in which case all instances are returned in an array.
3332:
3333: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall, noblockcheck):
3334:
3335: The map is a specification of a map to retreive the resources from,
3336: either as a url or as an object. The filterFunc is a reference to a
3337: function that takes a resource object as its one argument and returns
3338: true if the resource should be included, or false if it should not
3339: be. If recursive is true, the map will be recursively examined,
3340: otherwise it will not be. If bailout is true, the function will return
3341: as soon as it finds a resource, if false it will finish. If showall is
3342: true it will not hide maps that contain nothing but one other map. The
3343: noblockcheck arg is propagated to become the sixth arg in the call to
3344: lonnet::allowed when checking a resource's availability during collection
3345: of resources using the iterator. noblockcheck needs to be true if
3346: retrieveResources() was called by a routine that itself was called by
3347: lonnet::allowed, in order to avoid recursion. By default the map
3348: is the top-level map of the course, filterFunc is a function that
3349: always returns 1, recursive is true, bailout is false, showall is
3350: false. The resources will be returned in a list containing the
3351: resource objects for the corresponding resources, with B<no structure
3352: information> in the list; regardless of branching, recursion, etc.,
3353: it will be a flat list.
3354:
3355: Thus, this is suitable for cases where you don't want the structure,
3356: just a list of all resources. It is also suitable for finding out how
3357: many resources match a given description; for this use, if all you
3358: want to know is if I<any> resources match the description, the bailout
3359: parameter will allow you to avoid potentially expensive enumeration of
3360: all matching resources.
3361:
3362: =item * B<hasResource>(map, filterFunc, recursive, showall):
3363:
3364: Convenience method for
3365:
3366: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
3367:
3368: which will tell whether the map has resources matching the description
3369: in the filter function.
3370:
3371: =item * B<usedVersion>(url):
3372:
3373: Retrieves version infomation for a url. Returns the version (a number, or
3374: the string "mostrecent") for resources which have version information in
3375: the big hash.
3376:
3377: =cut
3378:
3379:
3380: sub getResourceByUrl {
3381: my $self = shift;
3382: my $resUrl = shift;
3383: my $multiple = shift;
3384:
3385: if (ref($resUrl)) { return $resUrl; }
3386:
3387: $resUrl = &Apache::lonnet::clutter($resUrl);
3388: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
3389: if (!$resId) { return ''; }
3390: if ($multiple) {
3391: my @resources = ();
3392: my @resIds = split (/,/, $resId);
3393: foreach my $id (@resIds) {
3394: my $resourceId = $self->getById($id);
3395: if ($resourceId) {
3396: push(@resources,$resourceId);
3397: }
3398: }
3399: return @resources;
3400: } else {
3401: if ($resId =~ /,/) {
3402: $resId = (split (/,/, $resId))[0];
3403: }
3404: return $self->getById($resId);
3405: }
3406: }
3407:
3408: sub retrieveResources {
3409: my $self = shift;
3410: my $map = shift;
3411: my $filterFunc = shift;
3412: if (!defined ($filterFunc)) {
3413: $filterFunc = sub {return 1;};
3414: }
3415: my $recursive = shift;
3416: if (!defined($recursive)) { $recursive = 1; }
3417: my $bailout = shift;
3418: if (!defined($bailout)) { $bailout = 0; }
3419: my $showall = shift;
3420: my $noblockcheck = shift;
3421: # Create the necessary iterator.
3422: if (!ref($map)) { # assume it's a url of a map.
3423: $map = $self->getResourceByUrl($map);
3424: }
3425:
3426: # If nothing was passed, assume top-level map
3427: if (!$map) {
3428: $map = $self->getById('0.0');
3429: }
3430:
3431: # Check the map's validity.
3432: if (!$map->is_map()) {
3433: # Oh, to throw an exception.... how I'd love that!
3434: return ();
3435: }
3436:
3437: # Get an iterator.
3438: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
3439: undef, $recursive, $showall);
3440:
3441: my @resources = ();
3442:
3443: if (&$filterFunc($map)) {
3444: push(@resources, $map);
3445: }
3446:
3447: # Run down the iterator and collect the resources.
3448: my $curRes;
3449:
3450: while ($curRes = $it->next(undef,$noblockcheck)) {
3451: if (ref($curRes)) {
3452: if (!&$filterFunc($curRes)) {
3453: next;
3454: }
3455:
3456: push(@resources, $curRes);
3457:
3458: if ($bailout) {
3459: return @resources;
3460: }
3461: }
3462:
3463: }
3464:
3465: return @resources;
3466: }
3467:
3468: sub hasResource {
3469: my $self = shift;
3470: my $map = shift;
3471: my $filterFunc = shift;
3472: my $recursive = shift;
3473: my $showall = shift;
3474:
3475: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
3476: }
3477:
3478: sub usedVersion {
3479: my $self = shift;
3480: my $linkurl = shift;
3481: return $self->navhash("version_$linkurl");
3482: }
3483:
3484: 1;
3485:
3486: package Apache::lonnavmaps::iterator;
3487: use Scalar::Util qw(weaken);
3488: use Apache::lonnet;
3489:
3490: =pod
3491:
3492: =back
3493:
3494: =head1 Object: navmap Iterator
3495:
3496: An I<iterator> encapsulates the logic required to traverse a data
3497: structure. navmap uses an iterator to traverse the course map
3498: according to the criteria you wish to use.
3499:
3500: To obtain an iterator, call the B<getIterator>() function of a
3501: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
3502: directly.) This will return a reference to the iterator:
3503:
3504: C<my $resourceIterator = $navmap-E<gt>getIterator();>
3505:
3506: To get the next thing from the iterator, call B<next>:
3507:
3508: C<my $nextThing = $resourceIterator-E<gt>next()>
3509:
3510: getIterator behaves as follows:
3511:
3512: =over 4
3513:
3514: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
3515:
3516: All parameters are optional. firstResource is a resource reference
3517: corresponding to where the iterator should start. It defaults to
3518: navmap->firstResource() for the corresponding nav map. finishResource
3519: corresponds to where you want the iterator to end, defaulting to
3520: navmap->finishResource(). filterHash is a hash used as a set
3521: containing strings representing the resource IDs, defaulting to
3522: empty. Condition is a 1 or 0 that sets what to do with the filter
3523: hash: If a 0, then only resources that exist IN the filterHash will be
3524: recursed on. If it is a 1, only resources NOT in the filterHash will
3525: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
3526: false (default), the iterator will only return the first level of map
3527: that is not just a single, 'redirecting' map. If true, the iterator
3528: will return all information, starting with the top-level map,
3529: regardless of content. returnTopMap, if true (default false), will
3530: cause the iterator to return the top-level map object (resource 0.0)
3531: before anything else.
3532:
3533: Thus, by default, only top-level resources will be shown. Change the
3534: condition to a 1 without changing the hash, and all resources will be
3535: shown. Changing the condition to 1 and including some values in the
3536: hash will allow you to selectively suppress parts of the navmap, while
3537: leaving it on 0 and adding things to the hash will allow you to
3538: selectively add parts of the nav map. See the handler code for
3539: examples.
3540:
3541: The iterator will return either a reference to a resource object, or a
3542: token representing something in the map, such as the beginning of a
3543: new branch. The possible tokens are:
3544:
3545: =over 4
3546:
3547: =item * B<END_ITERATOR>:
3548:
3549: The iterator has returned all that it's going to. Further calls to the
3550: iterator will just produce more of these. This is a "false" value, and
3551: is the only false value the iterator which will be returned, so it can
3552: be used as a loop sentinel.
3553:
3554: =item * B<BEGIN_MAP>:
3555:
3556: A new map is being recursed into. This is returned I<after> the map
3557: resource itself is returned.
3558:
3559: =item * B<END_MAP>:
3560:
3561: The map is now done.
3562:
3563: =item * B<BEGIN_BRANCH>:
3564:
3565: A branch is now starting. The next resource returned will be the first
3566: in that branch.
3567:
3568: =item * B<END_BRANCH>:
3569:
3570: The branch is now done.
3571:
3572: =back
3573:
3574: The tokens are retreivable via methods on the iterator object, i.e.,
3575: $iterator->END_MAP.
3576:
3577: Maps can contain empty resources. The iterator will automatically skip
3578: over such resources, but will still treat the structure
3579: correctly. Thus, a complicated map with several branches, but
3580: consisting entirely of empty resources except for one beginning or
3581: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
3582: but only one resource will be returned.
3583:
3584: =back
3585:
3586: =head2 Normal Usage
3587:
3588: Normal usage of the iterator object is to do the following:
3589:
3590: my $it = $navmap->getIterator([your params here]);
3591: my $curRes;
3592: while ($curRes = $it->next()) {
3593: [your logic here]
3594: }
3595:
3596: Note that inside of the loop, it's frequently useful to check if
3597: "$curRes" is a reference or not with the reference function; only
3598: resource objects will be references, and any non-references will
3599: be the tokens described above.
3600:
3601: The next() routine can take two (optional) arguments:
3602: closeAllPages - if true will not recurse down a .page
3603: noblockcheck - passed to browsePriv() for passing as sixth arg to
3604: call to lonnet::allowed. This needs to be set if retrieveResources
3605: was already called from another routine called within lonnet::allowed,
3606: so as to prevent recursion.
3607:
3608: Also note there is some old code floating around that tries to track
3609: the depth of the iterator to see when it's done; do not copy that
3610: code. It is difficult to get right and harder to understand than
3611: this. They should be migrated to this new style.
3612:
3613: =cut
3614:
3615: # Here are the tokens for the iterator:
3616:
3617: sub END_ITERATOR { return 0; }
3618: sub BEGIN_MAP { return 1; } # begining of a new map
3619: sub END_MAP { return 2; } # end of the map
3620: sub BEGIN_BRANCH { return 3; } # beginning of a branch
3621: sub END_BRANCH { return 4; } # end of a branch
3622: sub FORWARD { return 1; } # go forward
3623: sub BACKWARD { return 2; }
3624:
3625: sub min {
3626: (my $a, my $b) = @_;
3627: if ($a < $b) { return $a; } else { return $b; }
3628: }
3629:
3630: sub new {
3631: # magic invocation to create a class instance
3632: my $proto = shift;
3633: my $class = ref($proto) || $proto;
3634: my $self = {};
3635:
3636: weaken($self->{NAV_MAP} = shift);
3637: return undef unless ($self->{NAV_MAP});
3638:
3639: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3640: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3641:
3642: # Handle the parameters
3643: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3644: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3645:
3646: # If the given resources are just the ID of the resource, get the
3647: # objects
3648: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3649: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3650: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3651: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3652:
3653: $self->{FILTER} = shift;
3654:
3655: # A hash, used as a set, of resource already seen
3656: $self->{ALREADY_SEEN} = shift;
3657: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
3658: $self->{CONDITION} = shift;
3659:
3660: # Do we want to automatically follow "redirection" maps?
3661: $self->{FORCE_TOP} = shift;
3662:
3663: # Do we want to return the top-level map object (resource 0.0)?
3664: $self->{RETURN_0} = shift;
3665: # have we done that yet?
3666: $self->{HAVE_RETURNED_0} = 0;
3667:
3668: # Now, we need to pre-process the map, by walking forward and backward
3669: # over the parts of the map we're going to look at.
3670:
3671: # The processing steps are exactly the same, except for a few small
3672: # changes, so I bundle those up in the following list of two elements:
3673: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
3674: # first_resource).
3675: # This prevents writing nearly-identical code twice.
3676: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
3677: 'FIRST_RESOURCE'],
3678: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
3679: 'FINISH_RESOURCE'] );
3680:
3681: my $maxDepth = 0; # tracks max depth
3682:
3683: # If there is only one resource in this map, and it's a map, we
3684: # want to remember that, so the user can ask for the first map
3685: # that isn't just a redirector.
3686: my $resource; my $resourceCount = 0;
3687:
3688: # Documentation on this algorithm can be found in the CVS repository at
3689: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
3690: # in that file.
3691: # **1**
3692:
3693: foreach my $pass (@iterations) {
3694: my $direction = $pass->[0];
3695: my $valName = $pass->[1];
3696: my $nextResourceMethod = $pass->[2];
3697: my $firstResourceName = $pass->[3];
3698:
3699: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
3700: $self->{FIRST_RESOURCE},
3701: $self->{FINISH_RESOURCE},
3702: {}, undef, 0, $direction);
3703:
3704: # prime the recursion
3705: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
3706: $iterator->next();
3707: my $curRes = $iterator->next();
3708: my $depth = 1;
3709: while ($depth > 0) {
3710: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
3711: if ($curRes == $iterator->END_MAP()) { $depth--; }
3712:
3713: if (ref($curRes)) {
3714: # If there's only one resource, this will save it
3715: # we have to filter empty resources from consideration here,
3716: # or even "empty", redirecting maps have two (start & finish)
3717: # or three (start, finish, plus redirector)
3718: if($direction == FORWARD && $curRes->src()) {
3719: $resource = $curRes; $resourceCount++;
3720: }
3721: my $resultingVal = $curRes->{DATA}->{$valName};
3722: my $nextResources = $curRes->$nextResourceMethod();
3723: my $nextCount = scalar(@{$nextResources});
3724:
3725: if ($nextCount == 1) { # **3**
3726: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
3727: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
3728: }
3729:
3730: if ($nextCount > 1) { # **4**
3731: foreach my $res (@{$nextResources}) {
3732: my $current = $res->{DATA}->{$valName} || 999999999;
3733: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
3734: }
3735: }
3736: }
3737:
3738: # Assign the final val (**2**)
3739: if (ref($curRes) && $direction == BACKWARD()) {
3740: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
3741: $curRes->{DATA}->{BOT_UP_VAL});
3742:
3743: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
3744: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
3745: }
3746:
3747: $curRes = $iterator->next();
3748: }
3749: }
3750:
3751: # Check: Was this only one resource, a map?
3752: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
3753: my $firstResource = $resource->map_start();
3754: my $finishResource = $resource->map_finish();
3755: return Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3756: $finishResource, $self->{FILTER},
3757: $self->{ALREADY_SEEN},
3758: $self->{CONDITION},
3759: $self->{FORCE_TOP});
3760: }
3761:
3762: # Set up some bookkeeping information.
3763: $self->{CURRENT_DEPTH} = 0;
3764: $self->{MAX_DEPTH} = $maxDepth;
3765: $self->{STACK} = [];
3766: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3767: $self->{FINISHED} = 0; # When true, the iterator has finished
3768:
3769: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
3770: push @{$self->{STACK}}, [];
3771: }
3772:
3773: # Prime the recursion w/ the first resource **5**
3774: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
3775: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
3776:
3777: bless ($self);
3778: return $self;
3779: }
3780:
3781: sub next {
3782: my $self = shift;
3783: my $closeAllPages=shift;
3784: my $noblockcheck = shift;
3785: if ($self->{FINISHED}) {
3786: return END_ITERATOR();
3787: }
3788:
3789: # If we want to return the top-level map object, and haven't yet,
3790: # do so.
3791: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
3792: $self->{HAVE_RETURNED_0} = 1;
3793: my $nextTopLevel = $self->{NAV_MAP}->getById('0.0');
3794: return $self->{NAV_MAP}->getById('0.0');
3795: }
3796: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {
3797: $self->{HAVE_RETURNED_0_BEGIN_MAP} = 1;
3798: return $self->BEGIN_MAP();
3799: }
3800:
3801: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3802: # grab the next from the recursive iterator
3803: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
3804:
3805: # is it a begin or end map? If so, update the depth
3806: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3807: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3808:
3809: # Are we back at depth 0? If so, stop recursing
3810: if ($self->{RECURSIVE_DEPTH} == 0) {
3811: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3812: }
3813: return $next;
3814: }
3815:
3816: if (defined($self->{FORCE_NEXT})) {
3817: my $tmp = $self->{FORCE_NEXT};
3818: $self->{FORCE_NEXT} = undef;
3819: return $tmp;
3820: }
3821:
3822: # Have we not yet begun? If not, return BEGIN_MAP and
3823: # remember we've started.
3824: if ( !$self->{STARTED} ) {
3825: $self->{STARTED} = 1;
3826: return $self->BEGIN_MAP();
3827: }
3828:
3829: # Here's the guts of the iterator.
3830:
3831: # Find the next resource, if any.
3832: my $found = 0;
3833: my $i = $self->{MAX_DEPTH};
3834: my $newDepth;
3835: my $here;
3836: while ( $i >= 0 && !$found ) {
3837: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
3838: $here = pop @{$self->{STACK}->[$i]}; # **7**
3839: $found = 1;
3840: $newDepth = $i;
3841: }
3842: $i--;
3843: }
3844:
3845: # If we still didn't find anything, we're done.
3846: if ( !$found ) {
3847: # We need to get back down to the correct branch depth
3848: if ( $self->{CURRENT_DEPTH} > 0 ) {
3849: $self->{CURRENT_DEPTH}--;
3850: return END_BRANCH();
3851: } else {
3852: $self->{FINISHED} = 1;
3853: return END_MAP();
3854: }
3855: }
3856:
3857: # If this is not a resource, it must be an END_BRANCH marker we want
3858: # to return directly.
3859: if (!ref($here)) { # **8**
3860: if ($here == END_BRANCH()) { # paranoia, in case of later extension
3861: $self->{CURRENT_DEPTH}--;
3862: return $here;
3863: }
3864: }
3865:
3866: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
3867: $self->{HERE} = $here;
3868:
3869: # Get to the right level
3870: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
3871: push @{$self->{STACK}->[$newDepth]}, $here;
3872: $self->{CURRENT_DEPTH}--;
3873: return END_BRANCH();
3874: }
3875: if ( $self->{CURRENT_DEPTH} < $newDepth) {
3876: push @{$self->{STACK}->[$newDepth]}, $here;
3877: $self->{CURRENT_DEPTH}++;
3878: return BEGIN_BRANCH();
3879: }
3880:
3881: # If we made it here, we have the next resource, and we're at the
3882: # right branch level. So let's examine the resource for where
3883: # we can get to from here.
3884:
3885: # So we need to look at all the resources we can get to from here,
3886: # categorize them if we haven't seen them, remember if we have a new
3887: my $nextUnfiltered = $here->getNext();
3888:
3889:
3890: my $maxDepthAdded = -1;
3891:
3892: for (@$nextUnfiltered) {
3893: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
3894: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3895: push @{$self->{STACK}->[$depth]}, $_;
3896: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
3897: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
3898: }
3899: }
3900:
3901: # Is this the end of a branch? If so, all of the resources examined above
3902: # led to lower levels than the one we are currently at, so we push a END_BRANCH
3903: # marker onto the stack so we don't forget.
3904: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3905: # BC branch and gets to C, it will see F as the only next resource, but it's
3906: # one level lower. Thus, this is the end of the branch, since there are no
3907: # more resources added to this level or above.
3908: # We don't do this if the examined resource is the finish resource,
3909: # because the condition given above is true, but the "END_MAP" will
3910: # take care of things and we should already be at depth 0.
3911: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
3912: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
3913: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3914: }
3915:
3916: # That ends the main iterator logic. Now, do we want to recurse
3917: # down this map (if this resource is a map)?
3918: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
3919: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
3920: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3921: my $firstResource = $self->{HERE}->map_start();
3922: my $finishResource = $self->{HERE}->map_finish();
3923: $self->{RECURSIVE_ITERATOR} =
3924: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3925: $finishResource, $self->{FILTER},
3926: $self->{ALREADY_SEEN},
3927: $self->{CONDITION},
3928: $self->{FORCE_TOP});
3929: }
3930:
3931: # If this is a blank resource, don't actually return it.
3932: # Should you ever find you need it, make sure to add an option to the code
3933: # that you can use; other things depend on this behavior.
3934: my $browsePriv = $self->{HERE}->browsePriv($noblockcheck);
3935: if (!$self->{HERE}->src() ||
3936: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
3937: return $self->next($closeAllPages);
3938: }
3939:
3940: return $self->{HERE};
3941:
3942: }
3943:
3944: =pod
3945:
3946: The other method available on the iterator is B<getStack>, which
3947: returns an array populated with the current 'stack' of maps, as
3948: references to the resource objects. Example: This is useful when
3949: making the navigation map, as we need to check whether we are under a
3950: page map to see if we need to link directly to the resource, or to the
3951: page. The first elements in the array will correspond to the top of
3952: the stack (most inclusive map).
3953:
3954: =cut
3955:
3956: sub getStack {
3957: my $self=shift;
3958:
3959: my @stack;
3960:
3961: $self->populateStack(\@stack);
3962:
3963: return \@stack;
3964: }
3965:
3966: # Private method: Calls the iterators recursively to populate the stack.
3967: sub populateStack {
3968: my $self=shift;
3969: my $stack = shift;
3970:
3971: push @$stack, $self->{HERE} if ($self->{HERE});
3972:
3973: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3974: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3975: }
3976: }
3977:
3978: 1;
3979:
3980: package Apache::lonnavmaps::DFSiterator;
3981: use Scalar::Util qw(weaken);
3982: use Apache::lonnet;
3983:
3984: # Not documented in the perldoc: This is a simple iterator that just walks
3985: # through the nav map and presents the resources in a depth-first search
3986: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3987: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3988: # useful for pre-processing of some kind, and is in fact used by the main
3989: # iterator that way, but that's about it.
3990: # One could imagine merging this into the init routine of the main iterator,
3991: # but this might as well be left separate, since it is possible some other
3992: # use might be found for it. - Jeremy
3993:
3994: # Unlike the main iterator, this DOES return all resources, even blank ones.
3995: # The main iterator needs them to correctly preprocess the map.
3996:
3997: sub BEGIN_MAP { return 1; } # begining of a new map
3998: sub END_MAP { return 2; } # end of the map
3999: sub FORWARD { return 1; } # go forward
4000: sub BACKWARD { return 2; }
4001:
4002: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
4003: # filter hash ref (or undef), already seen hash or undef, condition
4004: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
4005: sub new {
4006: # magic invocation to create a class instance
4007: my $proto = shift;
4008: my $class = ref($proto) || $proto;
4009: my $self = {};
4010:
4011: weaken($self->{NAV_MAP} = shift);
4012: return undef unless ($self->{NAV_MAP});
4013:
4014: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
4015: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
4016:
4017: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
4018: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
4019:
4020: # If the given resources are just the ID of the resource, get the
4021: # objects
4022: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
4023: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
4024: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
4025: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
4026:
4027: $self->{FILTER} = shift;
4028:
4029: # A hash, used as a set, of resource already seen
4030: $self->{ALREADY_SEEN} = shift;
4031: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
4032: $self->{CONDITION} = shift;
4033: $self->{DIRECTION} = shift || FORWARD();
4034:
4035: # Flag: Have we started yet?
4036: $self->{STARTED} = 0;
4037:
4038: # Should we continue calling the recursive iterator, if any?
4039: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
4040: # The recursive iterator, if any
4041: $self->{RECURSIVE_ITERATOR} = undef;
4042: # Are we recursing on a map, or a branch?
4043: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
4044: # And the count of how deep it is, so that this iterator can keep track of
4045: # when to pick back up again.
4046: $self->{RECURSIVE_DEPTH} = 0;
4047:
4048: # For keeping track of our branches, we maintain our own stack
4049: $self->{STACK} = [];
4050:
4051: # Start with the first resource
4052: if ($self->{DIRECTION} == FORWARD) {
4053: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
4054: } else {
4055: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
4056: }
4057:
4058: bless($self);
4059: return $self;
4060: }
4061:
4062: sub next {
4063: my $self = shift;
4064:
4065: # Are we using a recursive iterator? If so, pull from that and
4066: # watch the depth; we want to resume our level at the correct time.
4067: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
4068: # grab the next from the recursive iterator
4069: my $next = $self->{RECURSIVE_ITERATOR}->next();
4070:
4071: # is it a begin or end map? Update depth if so
4072: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
4073: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
4074:
4075: # Are we back at depth 0? If so, stop recursing.
4076: if ($self->{RECURSIVE_DEPTH} == 0) {
4077: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
4078: }
4079:
4080: return $next;
4081: }
4082:
4083: # Is there a current resource to grab? If not, then return
4084: # END_MAP, which will end the iterator.
4085: if (scalar(@{$self->{STACK}}) == 0) {
4086: return $self->END_MAP();
4087: }
4088:
4089: # Have we not yet begun? If not, return BEGIN_MAP and
4090: # remember that we've started.
4091: if ( !$self->{STARTED} ) {
4092: $self->{STARTED} = 1;
4093: return $self->BEGIN_MAP;
4094: }
4095:
4096: # Get the next resource in the branch
4097: $self->{HERE} = pop @{$self->{STACK}};
4098:
4099: # remember that we've seen this, so we don't return it again later
4100: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
4101:
4102: # Get the next possible resources
4103: my $nextUnfiltered;
4104: if ($self->{DIRECTION} == FORWARD()) {
4105: $nextUnfiltered = $self->{HERE}->getNext();
4106: } else {
4107: $nextUnfiltered = $self->{HERE}->getPrevious();
4108: }
4109: my $next = [];
4110:
4111: # filter the next possibilities to remove things we've
4112: # already seen.
4113: foreach my $item (@$nextUnfiltered) {
4114: if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
4115: push @$next, $item;
4116: }
4117: }
4118:
4119: while (@$next) {
4120: # copy the next possibilities over to the stack
4121: push @{$self->{STACK}}, shift @$next;
4122: }
4123:
4124: # If this is a map and we want to recurse down it... (not filtered out)
4125: if ($self->{HERE}->is_map() &&
4126: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
4127: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
4128: my $firstResource = $self->{HERE}->map_start();
4129: my $finishResource = $self->{HERE}->map_finish();
4130:
4131: $self->{RECURSIVE_ITERATOR} =
4132: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
4133: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
4134: $self->{CONDITION}, $self->{DIRECTION});
4135: }
4136:
4137: return $self->{HERE};
4138: }
4139:
4140: # Identical to the full iterator methods of the same name. Hate to copy/paste
4141: # but I also hate to "inherit" either iterator from the other.
4142:
4143: sub getStack {
4144: my $self=shift;
4145:
4146: my @stack;
4147:
4148: $self->populateStack(\@stack);
4149:
4150: return \@stack;
4151: }
4152:
4153: # Private method: Calls the iterators recursively to populate the stack.
4154: sub populateStack {
4155: my $self=shift;
4156: my $stack = shift;
4157:
4158: push @$stack, $self->{HERE} if ($self->{HERE});
4159:
4160: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
4161: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
4162: }
4163: }
4164:
4165: 1;
4166:
4167: package Apache::lonnavmaps::resource;
4168: use Scalar::Util qw(weaken);
4169: use Apache::lonnet;
4170:
4171: =pod
4172:
4173: =head1 Object: resource
4174:
4175: X<resource, navmap object>
4176: A resource object encapsulates a resource in a resource map, allowing
4177: easy manipulation of the resource, querying the properties of the
4178: resource (including user properties), and represents a reference that
4179: can be used as the canonical representation of the resource by
4180: lonnavmap clients like renderers.
4181:
4182: A resource only makes sense in the context of a navmap, as some of the
4183: data is stored in the navmap object.
4184:
4185: You will probably never need to instantiate this object directly. Use
4186: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
4187: starting resource.
4188:
4189: Resource objects respect the parameter_hiddenparts, which suppresses
4190: various parts according to the wishes of the map author. As of this
4191: writing, there is no way to override this parameter, and suppressed
4192: parts will never be returned, nor will their response types or ids be
4193: stored.
4194:
4195: =head2 Overview
4196:
4197: A B<Resource> is the most granular type of object in LON-CAPA that can
4198: be included in a course. It can either be a particular resource, like
4199: an HTML page, external resource, problem, etc., or it can be a
4200: container sequence, such as a "page" or a "map".
4201:
4202: To see a sequence from the user's point of view, please see the
4203: B<Creating a Course: Maps and Sequences> chapter of the Author's
4204: Manual.
4205:
4206: A Resource Object, once obtained from a navmap object via a B<getBy*>
4207: method of the navmap, or from an iterator, allows you to query
4208: information about that resource.
4209:
4210: Generally, you do not ever want to create a resource object yourself,
4211: so creation has been left undocumented. Always retrieve resources
4212: from navmap objects.
4213:
4214: =head3 Identifying Resources
4215:
4216: X<big hash>Every resource is identified by a Resource ID in the big hash that is
4217: unique to that resource for a given course. X<resource ID, in big hash>
4218: The Resource ID has the form #.#, where the first number is the same
4219: for every resource in a map, and the second is unique. For instance,
4220: for a course laid out like this:
4221:
4222: * Problem 1
4223: * Map
4224: * Resource 2
4225: * Resource 3
4226:
4227: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
4228: C<Resource 3> will share a first number. The second number may end up
4229: re-used between the two groups.
4230:
4231: The resource ID is only used in the big hash, but can be used in the
4232: context of a course to identify a resource easily. (For instance, the
4233: printing system uses it to record which resources from a sequence you
4234: wish to print.)
4235:
4236: X<symb> X<resource, symb>
4237: All resources also have B<symb>s, which uniquely identify a resource
4238: in a course. Many internal LON-CAPA functions expect a symb. A symb
4239: carries along with it the URL of the resource, and the map it appears
4240: in. Symbs are much larger than resource IDs.
4241:
4242: =cut
4243:
4244: sub new {
4245: # magic invocation to create a class instance
4246: my $proto = shift;
4247: my $class = ref($proto) || $proto;
4248: my $self = {};
4249:
4250: weaken($self->{NAV_MAP} = shift);
4251: $self->{ID} = shift;
4252:
4253: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
4254: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
4255:
4256: # Store this new resource in the parent nav map's cache.
4257: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
4258: $self->{RESOURCE_ERROR} = 0;
4259:
4260: $self->{DUEDATE_CACHE} = undef;
4261:
4262: # A hash that can be used by two-pass algorithms to store data
4263: # about this resource in. Not used by the resource object
4264: # directly.
4265: $self->{DATA} = {};
4266:
4267: bless($self);
4268:
4269: # This is a speed optimization, to avoid calling symb() too often.
4270: $self->{SYMB} = $self->symb();
4271:
4272: return $self;
4273: }
4274:
4275: # private function: simplify the NAV_HASH lookups we keep doing
4276: # pass the name, and to automatically append my ID, pass a true val on the
4277: # second param
4278: sub navHash {
4279: my $self = shift;
4280: my $param = shift;
4281: my $id = shift;
4282: my $arg = $param . ($id?$self->{ID}:"");
4283: if (ref($self) && ref($self->{NAV_MAP}) && defined($arg)) {
4284: return $self->{NAV_MAP}->navhash($arg);
4285: }
4286: return;
4287: }
4288:
4289: =pod
4290:
4291: =head2 Methods
4292:
4293: Once you have a resource object, here's what you can do with it:
4294:
4295: =head3 Attribute Retrieval
4296:
4297: Every resource has certain attributes that can be retrieved and used:
4298:
4299: =over 4
4300:
4301: =item * B<ID>: Every resource has an ID that is unique for that
4302: resource in the course it is in. The ID is actually in the hash
4303: representing the resource, so for a resource object $res, obtain
4304: it via C<$res->{ID}).
4305:
4306: =item * B<compTitle>:
4307:
4308: Returns a "composite title", that is equal to $res->title() if the
4309: resource has a title, and is otherwise the last part of the URL (e.g.,
4310: "problem.problem").
4311:
4312: =item * B<ext>:
4313:
4314: Returns true if the resource is external.
4315:
4316: =item * B<kind>:
4317:
4318: Returns the kind of the resource from the compiled nav map.
4319:
4320: =item * B<randomout>:
4321:
4322: Returns true if this resource was chosen to NOT be shown to the user
4323: by the random map selection feature. In other words, this is usually
4324: false.
4325:
4326: =item * B<randompick>:
4327:
4328: Returns the number of randomly picked items for a map if the randompick
4329: feature is being used on the map.
4330:
4331: =item * B<randomorder>:
4332:
4333: Returns true for a map if the randomorder feature is being used on the
4334: map.
4335:
4336: =item * B<src>:
4337:
4338: Returns the source for the resource.
4339:
4340: =item * B<symb>:
4341:
4342: Returns the symb for the resource.
4343:
4344: =item * B<title>:
4345:
4346: Returns the title of the resource.
4347:
4348: =back
4349:
4350: =cut
4351:
4352: # These info functions can be used directly, as they don't return
4353: # resource information.
4354: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
4355: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
4356: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
4357: sub from { my $self=shift; return $self->navHash("from_", 1); }
4358: # considered private and undocumented
4359: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
4360: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
4361: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
4362: sub randompick {
4363: my $self = shift;
4364: my $randompick = $self->parmval('randompick');
4365: return $randompick;
4366: }
4367: sub randomorder {
4368: my $self = shift;
4369: my $randomorder = $self->parmval('randomorder');
4370: return ($randomorder =~ /^yes$/i);
4371: }
4372: sub link {
4373: my $self=shift;
4374: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
4375: return $self->src;
4376: }
4377: sub src {
4378: my $self=shift;
4379: return $self->navHash("src_", 1);
4380: }
4381: sub shown_symb {
4382: my $self=shift;
4383: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->{SYMB});}
4384: return $self->{SYMB};
4385: }
4386: sub id {
4387: my $self=shift;
4388: return $self->{ID};
4389: }
4390: sub enclosing_map_src {
4391: my $self=shift;
4392: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4393: return $self->navHash('map_id_'.$first);
4394: }
4395: sub symb {
4396: my $self=shift;
4397: if (defined $self->{SYMB}) { return $self->{SYMB}; }
4398: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4399: my $symbSrc = &Apache::lonnet::declutter($self->src());
4400: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
4401: . '___' . $second . '___' . $symbSrc;
4402: return &Apache::lonnet::symbclean($symb);
4403: }
4404: sub wrap_symb {
4405: my $self = shift;
4406: return $self->{NAV_MAP}->wrap_symb($self->{SYMB});
4407: }
4408: sub title {
4409: my $self=shift;
4410: if ($self->{ID} eq '0.0') {
4411: # If this is the top-level map, return the title of the course
4412: # since this map can not be titled otherwise.
4413: return $env{'course.'.$env{'request.course.id'}.'.description'};
4414: }
4415: return $self->navHash("title_", 1); }
4416: # considered private and undocumented
4417: sub to { my $self=shift; return $self->navHash("to_", 1); }
4418: sub condition {
4419: my $self=shift;
4420: my $undercond=$self->navHash("undercond_", 1);
4421: if (!defined($undercond)) { return 1; };
4422: my $condid=$self->navHash("condid_$undercond");
4423: if (!defined($condid)) { return 1; };
4424: my $condition=&Apache::lonnet::directcondval($condid);
4425: return $condition;
4426: }
4427: sub condval {
4428: my $self=shift;
4429: my ($pathname,$filename) =
4430: &Apache::lonnet::split_uri_for_cond($self->src());
4431:
4432: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4433: /\&\Q$filename\E\:([\d\|]+)\&/);
4434: if ($match) {
4435: return &Apache::lonnet::condval($1);
4436: }
4437: return 0;
4438: }
4439: sub compTitle {
4440: my $self = shift;
4441: my $title = $self->title();
4442: $title=~s/\&colon\;/\:/gs;
4443: if (!$title) {
4444: $title = $self->src();
4445: $title = substr($title, rindex($title, '/') + 1);
4446: }
4447: return $title;
4448: }
4449:
4450: =pod
4451:
4452: B<Predicate Testing the Resource>
4453:
4454: These methods are shortcuts to deciding if a given resource has a given property.
4455:
4456: =over 4
4457:
4458: =item * B<is_map>:
4459:
4460: Returns true if the resource is a map type.
4461:
4462: =item * B<is_problem>:
4463:
4464: Returns true if the resource is a problem type, false
4465: otherwise. (Looks at the extension on the src field; might need more
4466: to work correctly.)
4467:
4468: =item * B<is_page>:
4469:
4470: Returns true if the resource is a page.
4471:
4472: =item * B<is_sequence>:
4473:
4474: Returns true if the resource is a sequence.
4475:
4476: =back
4477:
4478: =cut
4479:
4480: sub hasResource {
4481: my $self = shift;
4482: return $self->{NAV_MAP}->hasResource(@_);
4483: }
4484:
4485: sub retrieveResources {
4486: my $self = shift;
4487: return $self->{NAV_MAP}->retrieveResources(@_);
4488: }
4489:
4490: sub is_exam {
4491: my ($self,$part) = @_;
4492: my $type = $self->parmval('type',$part);
4493: if ($type eq 'exam') {
4494: return 1;
4495: }
4496: if ($self->src() =~ /\.(exam)$/) {
4497: return 1;
4498: }
4499: return 0;
4500: }
4501: sub is_html {
4502: my $self=shift;
4503: my $src = $self->src();
4504: return ($src =~ /html$/);
4505: }
4506: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
4507: sub is_page {
4508: my $self=shift;
4509: my $src = $self->src();
4510: return $self->navHash("is_map_", 1) &&
4511: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
4512: }
4513: sub is_practice {
4514: my $self=shift;
4515: my ($part) = @_;
4516: my $type = $self->parmval('type',$part);
4517: if ($type eq 'practice') {
4518: return 1;
4519: }
4520: return 0;
4521: }
4522: sub is_problem {
4523: my $self=shift;
4524: my $src = $self->src();
4525: if ($src =~ /$LONCAPA::assess_re/) {
4526: return !($self->is_practice());
4527: }
4528: return 0;
4529: }
4530: sub is_tool {
4531: my $self=shift;
4532: my $src = $self->src();
4533: return ($src =~ /ext\.tool$/);
4534: }
4535: sub is_gradable {
4536: my $self=shift;
4537: my $src = $self->src();
4538: if (($src =~ /$LONCAPA::assess_re/) ||
4539: (($self->is_tool()) && ($self->parmval('gradable',0) =~ /^yes$/i))) {
4540: return !($self->is_practice());
4541: }
4542: }
4543: #
4544: # The has below is the set of status that are considered 'incomplete'
4545: #
4546: my %incomplete_hash =
4547: (
4548: TRIES_LEFT() => 1,
4549: OPEN() => 1,
4550: ATTEMPTED() => 1
4551:
4552: );
4553: #
4554: # Return tru if a problem is incomplete... for now incomplete means that
4555: # any part of the problem is incomplete.
4556: # Note that if the resources is not a problem, 0 is returned.
4557: #
4558: sub is_incomplete {
4559: my $self = shift;
4560: if ($self->is_problem()) {
4561: foreach my $part (@{$self->parts()}) {
4562: if (exists($incomplete_hash{$self->status($part)})) {
4563: return 1;
4564: }
4565: }
4566: }
4567: return 0;
4568:
4569: }
4570: sub is_raw_problem {
4571: my $self=shift;
4572: my $src = $self->src();
4573: if ($src =~ /$LONCAPA::assess_re/) {
4574: return 1;
4575: }
4576: return 0;
4577: }
4578:
4579: sub contains_problem {
4580: my $self=shift;
4581: if ($self->is_page()) {
4582: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
4583: return $hasProblem;
4584: }
4585: return 0;
4586: }
4587: sub map_contains_problem {
4588: my $self=shift;
4589: if ($self->is_map()) {
4590: my $has_problem=
4591: $self->hasResource($self,sub { $_[0]->is_problem() },1);
4592: return $has_problem;
4593: }
4594: return 0;
4595: }
4596: sub is_sequence {
4597: my $self=shift;
4598: return $self->navHash("is_map_", 1) &&
4599: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
4600: }
4601: sub is_survey {
4602: my $self = shift();
4603: my $part = shift();
4604: my $type = $self->parmval('type',$part);
4605: if (($type eq 'survey') || ($type eq 'surveycred')) {
4606: return 1;
4607: }
4608: if ($self->src() =~ /\.(survey)$/) {
4609: return 1;
4610: }
4611: return 0;
4612: }
4613: sub is_anonsurvey {
4614: my $self = shift();
4615: my $part = shift();
4616: my $type = $self->parmval('type',$part);
4617: if (($type eq 'anonsurvey') || ($type eq 'anonsurveycred')) {
4618: return 1;
4619: }
4620: return 0;
4621: }
4622: sub is_task {
4623: my $self=shift;
4624: my $src = $self->src();
4625: return ($src =~ /\.(task)$/)
4626: }
4627:
4628: sub is_empty_sequence {
4629: my $self=shift;
4630: my $src = $self->src();
4631: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
4632: }
4633:
4634: # Private method: Shells out to the parmval in the nav map, handler parts.
4635: sub parmval {
4636: my $self = shift;
4637: my $what = shift;
4638: my $part = shift;
4639: if (!defined($part)) {
4640: $part = '0';
4641: }
4642: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->{SYMB});
4643: }
4644:
4645: =pod
4646:
4647: B<Map Methods>
4648:
4649: These methods are useful for getting information about the map
4650: properties of the resource, if the resource is a map (B<is_map>).
4651:
4652: =over 4
4653:
4654: =item * B<map_finish>:
4655:
4656: Returns a reference to a resource object corresponding to the finish
4657: resource of the map.
4658:
4659: =item * B<map_pc>:
4660:
4661: Returns the pc value of the map, which is the first number that
4662: appears in the resource ID of the resources in the map, and is the
4663: number that appears around the middle of the symbs of the resources in
4664: that map.
4665:
4666: =item * B<map_start>:
4667:
4668: Returns a reference to a resource object corresponding to the start
4669: resource of the map.
4670:
4671: =item * B<map_type>:
4672:
4673: Returns a string with the type of the map in it.
4674:
4675: =item * B<map_hierarchy>:
4676:
4677: Returns a string with a comma-separated ordered list of map_pc IDs
4678: for the hierarchy of maps containing a map, with the top level
4679: map first, then descending to deeper levels, with the enclosing map last.
4680:
4681: =item * B<map_breadcrumbs>:
4682:
4683: Same as map_hierarchy, except maps containing only a single itemm if
4684: it's a map, or containing no items are omitted, unless it's the top
4685: level map (map_pc = 1), which is always included.
4686:
4687: =back
4688:
4689: =cut
4690:
4691: sub map_finish {
4692: my $self = shift;
4693: my $src = $self->src();
4694: $src = &Apache::lonnet::clutter($src);
4695: my $res = $self->navHash("map_finish_$src", 0);
4696: $res = $self->{NAV_MAP}->getById($res);
4697: return $res;
4698: }
4699: sub map_pc {
4700: my $self = shift;
4701: my $src = $self->src();
4702: return $self->navHash("map_pc_$src", 0);
4703: }
4704: sub map_start {
4705: my $self = shift;
4706: my $src = $self->src();
4707: $src = &Apache::lonnet::clutter($src);
4708: my $res = $self->navHash("map_start_$src", 0);
4709: $res = $self->{NAV_MAP}->getById($res);
4710: return $res;
4711: }
4712: sub map_type {
4713: my $self = shift;
4714: my $pc = $self->map_pc();
4715: return $self->navHash("map_type_$pc", 0);
4716: }
4717: sub map_hierarchy {
4718: my $self = shift;
4719: my $pc = $self->map_pc();
4720: return $self->navHash("map_hierarchy_$pc", 0);
4721: }
4722: sub map_breadcrumbs {
4723: my $self = shift;
4724: my $pc = $self->map_pc();
4725: return $self->navHash("map_breadcrumbs_$pc", 0);
4726: }
4727:
4728: #####
4729: # Property queries
4730: #####
4731:
4732: # These functions will be responsible for returning the CORRECT
4733: # VALUE for the parameter, no matter what. So while they may look
4734: # like direct calls to parmval, they can be more than that.
4735: # So, for instance, the duedate function should use the "duedatetype"
4736: # information, rather than the resource object user.
4737:
4738: =pod
4739:
4740: =head2 Resource Parameters
4741:
4742: In order to use the resource parameters correctly, the nav map must
4743: have been instantiated with genCourseAndUserOptions set to true, so
4744: the courseopt and useropt is read correctly. Then, you can call these
4745: functions to get the relevant parameters for the resource. Each
4746: function defaults to part "0", but can be directed to another part by
4747: passing the part as the parameter.
4748:
4749: These methods are responsible for getting the parameter correct, not
4750: merely reflecting the contents of the GDBM hashes. As we move towards
4751: dates relative to other dates, these methods should be updated to
4752: reflect that. (Then, anybody using these methods will not have to update
4753: their code.)
4754:
4755: =over 4
4756:
4757:
4758: =item * B<printable>
4759:
4760: returns true if the current date is such that the
4761: specified resource part is printable.
4762:
4763:
4764: =item * B<resprintable>
4765:
4766: Returns true if all parts in the resource are printable making the
4767: entire resource printable.
4768:
4769: =item * B<acc>
4770:
4771: Get the Client IP/Name Access Control information.
4772:
4773: =item * B<answerdate>:
4774:
4775: Get the answer-reveal date for the problem.
4776:
4777: =item * B<awarded>:
4778:
4779: Gets the awarded value for the problem part. Requires genUserData set to
4780: true when the navmap object was created.
4781:
4782: =item * B<duedate>:
4783:
4784: Get the due date for the problem.
4785:
4786: =item * B<tries>:
4787:
4788: Get the number of tries the student has used on the problem.
4789:
4790: =item * B<maxtries>:
4791:
4792: Get the number of max tries allowed.
4793:
4794: =item * B<opendate>:
4795:
4796: Get the open date for the problem.
4797:
4798: =item * B<sig>:
4799:
4800: Get the significant figures setting.
4801:
4802: =item * B<tol>:
4803:
4804: Get the tolerance for the problem.
4805:
4806: =item * B<tries>:
4807:
4808: Get the number of tries the user has already used on the problem.
4809:
4810: =item * B<type>:
4811:
4812: Get the question type for the problem.
4813:
4814: =item * B<weight>:
4815:
4816: Get the weight for the problem.
4817:
4818: =back
4819:
4820: =cut
4821:
4822:
4823:
4824:
4825: sub printable {
4826:
4827: my ($self, $part) = @_;
4828:
4829: # The following cases apply:
4830: # - If a start date is not set, it is replaced by the open date.
4831: # - Ditto for start/open replaced by content open.
4832: # - If neither start nor printdates are set the part is printable.
4833: # - Start date set but no end date: Printable if now >= start date.
4834: # - End date set but no start date: Printable if now <= end date.
4835: # - both defined: printable if start <= now <= end
4836: #
4837:
4838: # Get the print open/close dates for the resource.
4839:
4840: my $start = $self->parmval("printstartdate", $part);
4841: my $end = $self->parmval("printenddate", $part);
4842:
4843: if (!$start) {
4844: $start = $self->parmval("opendate", $part);
4845: }
4846: if (!$start) {
4847: $start = $self->parmval("contentopen", $part);
4848: }
4849:
4850:
4851: my $now = time();
4852:
4853:
4854: my $startok = 1;
4855: my $endok = 1;
4856:
4857: if ((defined $start) && ($start ne '')) {
4858: $startok = $start <= $now;
4859: }
4860: if ((defined $end) && ($end != '')) {
4861: $endok = $end >= $now;
4862: }
4863: return $startok && $endok;
4864: }
4865:
4866: sub resprintable {
4867: my $self = shift;
4868:
4869: # get parts...or realize there are no parts.
4870:
4871: my $partsref = $self->parts();
4872: my @parts = @$partsref;
4873:
4874: if (!@parts) {
4875: return $self->printable(0);
4876: } else {
4877: foreach my $part (@parts) {
4878: if (!$self->printable($part)) {
4879: return 0;
4880: }
4881: }
4882: return 1;
4883: }
4884: }
4885:
4886: sub acc {
4887: (my $self, my $part) = @_;
4888: my $acc = $self->parmval("acc", $part);
4889: return $acc;
4890: }
4891: sub answerdate {
4892: (my $self, my $part) = @_;
4893: # Handle intervals
4894: my $answerdatetype = $self->parmval("answerdate.type", $part);
4895: my $answerdate = $self->parmval("answerdate", $part);
4896: my $duedate = $self->parmval("duedate", $part);
4897: if ($answerdatetype eq 'date_interval') {
4898: $answerdate = $duedate + $answerdate;
4899: }
4900: return $answerdate;
4901: }
4902: sub awarded {
4903: my $self = shift; my $part = shift;
4904: $self->{NAV_MAP}->get_user_data();
4905: if (!defined($part)) { $part = '0'; }
4906: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.awarded'};
4907: }
4908: sub taskversion {
4909: my $self = shift; my $part = shift;
4910: $self->{NAV_MAP}->get_user_data();
4911: if (!defined($part)) { $part = '0'; }
4912: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.version'};
4913: }
4914: sub taskstatus {
4915: my $self = shift; my $part = shift;
4916: $self->{NAV_MAP}->get_user_data();
4917: if (!defined($part)) { $part = '0'; }
4918: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$self->taskversion($part).'.'.$part.'.status'};
4919: }
4920: sub solved {
4921: my $self = shift; my $part = shift;
4922: $self->{NAV_MAP}->get_user_data();
4923: if (!defined($part)) { $part = '0'; }
4924: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.solved'};
4925: }
4926: sub checkedin {
4927: my $self = shift; my $part = shift;
4928: $self->{NAV_MAP}->get_user_data();
4929: if (!defined($part)) { $part = '0'; }
4930: if ($self->is_task()) {
4931: my $version = $self->taskversion($part);
4932: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin.slot'});
4933: } else {
4934: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin.slot'});
4935: }
4936: }
4937: # this should work exactly like the copy in lonhomework.pm
4938: # Why is there a copy in lonhomework? Why not centralized?
4939: #
4940: # TODO: Centralize duedate.
4941: #
4942:
4943: sub duedate {
4944: (my $self, my $part) = @_;
4945: if (defined ($self->{DUEDATE_CACHE}->{$part})) {
4946: return $self->{DUEDATE_CACHE}->{$part};
4947: }
4948: my $date;
4949: my @interval=$self->parmval("interval", $part);
4950: my $due_date=$self->parmval("duedate", $part);
4951: if ($interval[0] =~ /^(\d+)/) {
4952: my $timelimit = $1;
4953: my $first_access=&Apache::lonnet::get_first_access($interval[1],
4954: $self->{SYMB});
4955: if (defined($first_access)) {
4956: my $interval = $first_access+$timelimit;
4957: $date = (!$due_date || $interval < $due_date) ? $interval
4958: : $due_date;
4959: } else {
4960: $date = $due_date;
4961: }
4962: } else {
4963: $date = $due_date;
4964: }
4965: $self->{DUEDATE_CACHE}->{$part} = $date;
4966: return $date;
4967: }
4968: sub handgrade {
4969: (my $self, my $part) = @_;
4970: my @response_ids = $self->responseIds($part);
4971: if (@response_ids) {
4972: foreach my $response_id (@response_ids) {
4973: my $handgrade = $self->parmval("handgrade",$part.'_'.$response_id);
4974: if (lc($handgrade) eq 'yes') {
4975: return 'yes';
4976: }
4977: }
4978: }
4979: my $handgrade = $self->parmval("handgrade", $part);
4980: return $handgrade;
4981: }
4982: sub maxtries {
4983: (my $self, my $part) = @_;
4984: my $maxtries = $self->parmval("maxtries", $part);
4985: return $maxtries;
4986: }
4987: sub opendate {
4988: (my $self, my $part) = @_;
4989: my $opendatetype = $self->parmval("opendate.type", $part);
4990: my $opendate = $self->parmval("opendate", $part);
4991: if ($opendatetype eq 'date_interval') {
4992: my $duedate = $self->duedate($part);
4993: $opendate = $duedate - $opendate;
4994: }
4995: return $opendate;
4996: }
4997: sub problemstatus {
4998: (my $self, my $part) = @_;
4999: my $problemstatus = $self->parmval("problemstatus", $part);
5000: return lc($problemstatus);
5001: }
5002: sub sig {
5003: (my $self, my $part) = @_;
5004: my $sig = $self->parmval("sig", $part);
5005: return $sig;
5006: }
5007: sub tol {
5008: (my $self, my $part) = @_;
5009: my $tol = $self->parmval("tol", $part);
5010: return $tol;
5011: }
5012: sub tries {
5013: my $self = shift;
5014: my $tries = $self->queryRestoreHash('tries', shift);
5015: if (!defined($tries)) { return '0';}
5016: return $tries;
5017: }
5018: sub type {
5019: (my $self, my $part) = @_;
5020: my $type = $self->parmval("type", $part);
5021: return $type;
5022: }
5023: sub weight {
5024: my $self = shift; my $part = shift;
5025: if (!defined($part)) { $part = '0'; }
5026: my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
5027: $self->{SYMB}, $self->{DOMAIN},
5028: $self->{USERNAME},
5029: $env{'request.course.sec'});
5030: return $weight;
5031: }
5032: sub part_display {
5033: my $self= shift(); my $partID = shift();
5034: if (! defined($partID)) { $partID = '0'; }
5035: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
5036: $self->{SYMB});
5037: if (! defined($display) || $display eq '') {
5038: $display = $partID;
5039: }
5040: return $display;
5041: }
5042: sub slot_control {
5043: my $self=shift(); my $part = shift();
5044: if (!defined($part)) { $part = '0'; }
5045: my $useslots = $self->parmval("useslots", $part);
5046: my $availablestudent = $self->parmval("availablestudent", $part);
5047: my $available = $self->parmval("available", $part);
5048: return ($useslots,$availablestudent,$available);
5049: }
5050:
5051: # Multiple things need this
5052: sub getReturnHash {
5053: my $self = shift;
5054:
5055: if (!defined($self->{RETURN_HASH})) {
5056: #my %tmpHash = &Apache::lonnet::restore($self->{SYMB},undef,$self->{DOMAIN},$self->{USERNAME});
5057: #$self->{RETURN_HASH} = \%tmpHash;
5058: # When info is retrieved for several resources (as when rendering a directory),
5059: # it is much faster to use the user profile dump and avoid repeated lonnet requests
5060: # (especially since lonnet::currentdump is using Lond directly whenever possible,
5061: # and lonnet::restore is not at this point).
5062: $self->{NAV_MAP}->get_user_data();
5063: $self->{RETURN_HASH} = $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}};
5064: }
5065: }
5066:
5067: ######
5068: # Status queries
5069: ######
5070:
5071: # These methods query the status of problems.
5072:
5073: # If we need to count parts, this function determines the number of
5074: # parts from the metadata. When called, it returns a reference to a list
5075: # of strings corresponding to the parts. (Thus, using it in a scalar context
5076: # tells you how many parts you have in the problem:
5077: # $partcount = scalar($resource->countParts());
5078: # Don't use $self->{PARTS} directly because you don't know if it's been
5079: # computed yet.
5080:
5081: =pod
5082:
5083: =head2 Resource misc
5084:
5085: Misc. functions for the resource.
5086:
5087: =over 4
5088:
5089: =item * B<hasDiscussion>:
5090:
5091: Returns a false value if there has been discussion since the user last
5092: logged in, true if there has. Always returns false if the discussion
5093: data was not extracted when the nav map was constructed.
5094:
5095: =item * B<last_post_time>:
5096:
5097: Returns a false value if there hasn't been discussion otherwise returns
5098: unix timestamp of last time a discussion posting (or edit) was made.
5099:
5100: =item * B<discussion_info>:
5101:
5102: optional argument is a filter (currently can be 'unread');
5103: returns in scalar context the count of the number of discussion postings.
5104:
5105: returns in list context both the count of postings and a hash ref
5106: containing information about the postings (subject, id, timestamp) in a hash.
5107:
5108: Default is to return counts for all postings. However if called with a second argument set to 'unread', will return information about only unread postings.
5109:
5110: =item * B<getFeedback>:
5111:
5112: Gets the feedback for the resource and returns the raw feedback string
5113: for the resource, or the null string if there is no feedback or the
5114: email data was not extracted when the nav map was constructed. Usually
5115: used like this:
5116:
5117: for my $url (split(/\,/, $res->getFeedback())) {
5118: my $link = &escape($url);
5119: ...
5120:
5121: and use the link as appropriate.
5122:
5123: =cut
5124:
5125: sub hasDiscussion {
5126: my $self = shift;
5127: return $self->{NAV_MAP}->hasDiscussion($self->{SYMB});
5128: }
5129:
5130: sub last_post_time {
5131: my $self = shift;
5132: return $self->{NAV_MAP}->last_post_time($self->{SYMB});
5133: }
5134:
5135: sub discussion_info {
5136: my ($self,$filter) = @_;
5137: return $self->{NAV_MAP}->discussion_info($self->{SYMB},$filter);
5138: }
5139:
5140: sub getFeedback {
5141: my $self = shift;
5142: my $source = $self->src();
5143: my $symb = $self->{SYMB};
5144: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
5145: return $self->{NAV_MAP}->getFeedback($symb,$source);
5146: }
5147:
5148: sub getErrors {
5149: my $self = shift;
5150: my $source = $self->src();
5151: my $symb = $self->{SYMB};
5152: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
5153: return $self->{NAV_MAP}->getErrors($symb,$source);
5154: }
5155:
5156: =pod
5157:
5158: =item * B<parts>():
5159:
5160: Returns a list reference containing sorted strings corresponding to
5161: each part of the problem. Single part problems have only a part '0'.
5162: Multipart problems do not return their part '0', since they typically
5163: do not really matter.
5164:
5165: =item * B<countParts>():
5166:
5167: Returns the number of parts of the problem a student can answer. Thus,
5168: for single part problems, returns 1. For multipart, it returns the
5169: number of parts in the problem, not including psuedo-part 0.
5170:
5171: =item * B<countResponses>():
5172:
5173: Returns the total number of responses in the problem a student can answer.
5174:
5175: =item * B<responseTypes>():
5176:
5177: Returns a hash whose keys are the response types. The values are the number
5178: of times each response type is used. This is for the I<entire> problem, not
5179: just a single part.
5180:
5181: =item * B<multipart>():
5182:
5183: Returns true if the problem is multipart, false otherwise. Use this instead
5184: of countParts if all you want is multipart/not multipart.
5185:
5186: =item * B<responseType>($part):
5187:
5188: Returns the response type of the part, without the word "response" on the
5189: end. Example return values: 'string', 'essay', 'numeric', etc.
5190:
5191: =item * B<responseIds>($part):
5192:
5193: Retreives the response IDs for the given part as an array reference containing
5194: strings naming the response IDs. This may be empty.
5195:
5196: =back
5197:
5198: =cut
5199:
5200: sub parts {
5201: my $self = shift;
5202:
5203: if ($self->ext) { return []; }
5204: if (($self->is_tool()) &&
5205: ($self->is_gradable())) { return ['0']; }
5206:
5207: $self->extractParts();
5208: return $self->{PARTS};
5209: }
5210:
5211: sub countParts {
5212: my $self = shift;
5213:
5214: my $parts = $self->parts();
5215:
5216: # If I left this here, then it's not necessary.
5217: #my $delta = 0;
5218: #for my $part (@$parts) {
5219: # if ($part eq '0') { $delta--; }
5220: #}
5221:
5222: if ($self->{RESOURCE_ERROR}) {
5223: return 0;
5224: }
5225:
5226: return scalar(@{$parts}); # + $delta;
5227: }
5228:
5229: sub countResponses {
5230: my $self = shift;
5231: my $count;
5232: foreach my $part (@{$self->parts()}) {
5233: $count+= scalar($self->responseIds($part));
5234: }
5235: return $count;
5236: }
5237:
5238: sub responseTypes {
5239: my $self = shift;
5240: my %responses;
5241: foreach my $part (@{$self->parts()}) {
5242: foreach my $responsetype ($self->responseType($part)) {
5243: $responses{$responsetype}++ if (defined($responsetype));
5244: }
5245: }
5246: return %responses;
5247: }
5248:
5249: sub multipart {
5250: my $self = shift;
5251: return $self->countParts() > 1;
5252: }
5253:
5254: sub singlepart {
5255: my $self = shift;
5256: return $self->countParts() == 1;
5257: }
5258:
5259: sub responseType {
5260: my $self = shift;
5261: my $part = shift;
5262:
5263: $self->extractParts();
5264: if (defined($self->{RESPONSE_TYPES}->{$part})) {
5265: return @{$self->{RESPONSE_TYPES}->{$part}};
5266: } else {
5267: return undef;
5268: }
5269: }
5270:
5271: sub responseIds {
5272: my $self = shift;
5273: my $part = shift;
5274:
5275: $self->extractParts();
5276: if (defined($self->{RESPONSE_IDS}->{$part})) {
5277: return @{$self->{RESPONSE_IDS}->{$part}};
5278: } else {
5279: return undef;
5280: }
5281: }
5282:
5283: # Private function: Extracts the parts information, both part names and
5284: # part types, and saves it.
5285: sub extractParts {
5286: my $self = shift;
5287:
5288: return if (defined($self->{PARTS}));
5289: return if ($self->ext);
5290:
5291: $self->{PARTS} = [];
5292:
5293: my %parts;
5294:
5295: # Retrieve part count, if this is a problem
5296: if ($self->is_raw_problem()) {
5297: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
5298: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
5299:
5300: if ($partorder) {
5301: my @parts;
5302: for my $part (split (/,/,$partorder)) {
5303: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
5304: push @parts, $part;
5305: $parts{$part} = 1;
5306: }
5307: }
5308: $self->{PARTS} = \@parts;
5309: } else {
5310: if (!$metadata) {
5311: $self->{RESOURCE_ERROR} = 1;
5312: $self->{PARTS} = [];
5313: $self->{PART_TYPE} = {};
5314: return;
5315: }
5316: foreach my $entry (split(/\,/,$metadata)) {
5317: if ($entry =~ /^(?:part|Task)_(.*)$/) {
5318: my $part = $1;
5319: # This floods the logs if it blows up
5320: if (defined($parts{$part})) {
5321: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->{SYMB});
5322: }
5323:
5324: # check to see if part is turned off.
5325:
5326: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
5327: $parts{$part} = 1;
5328: }
5329: }
5330: }
5331: my @sortedParts = sort(keys(%parts));
5332: $self->{PARTS} = \@sortedParts;
5333: }
5334:
5335:
5336: # These hashes probably do not need names that end with "Hash"....
5337: my %responseIdHash;
5338: my %responseTypeHash;
5339:
5340:
5341: # Init the responseIdHash
5342: foreach my $part (@{$self->{PARTS}}) {
5343: $responseIdHash{$part} = [];
5344: }
5345:
5346: # Now, the unfortunate thing about this is that parts, part name, and
5347: # response id are delimited by underscores, but both the part
5348: # name and response id can themselves have underscores in them.
5349: # So we have to use our knowlege of part names to figure out
5350: # where the part names begin and end, and even then, it is possible
5351: # to construct ambiguous situations.
5352: foreach my $data (split(/,/, $metadata)) {
5353: if ($data =~ /^([a-zA-Z]+)response_(.*)/
5354: || $data =~ /^(Task)_(.*)/) {
5355: my $responseType = $1;
5356: my $partStuff = $2;
5357: my $partIdSoFar = '';
5358: my @partChunks = split(/_/, $partStuff);
5359: my $i = 0;
5360: for ($i = 0; $i < scalar(@partChunks); $i++) {
5361: if ($partIdSoFar) { $partIdSoFar .= '_'; }
5362: $partIdSoFar .= $partChunks[$i];
5363: if ($parts{$partIdSoFar}) {
5364: my @otherChunks = @partChunks[$i+1..$#partChunks];
5365: my $responseId = join('_', @otherChunks);
5366: if ($self->is_task()) {
5367: push(@{$responseIdHash{$partIdSoFar}},
5368: $partIdSoFar);
5369: } else {
5370: push(@{$responseIdHash{$partIdSoFar}},
5371: $responseId);
5372: }
5373: push(@{$responseTypeHash{$partIdSoFar}},
5374: $responseType);
5375: }
5376: }
5377: }
5378: }
5379: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
5380: #
5381: # Reorder the arrays in the %responseIdHash and %responseTypeHash
5382: if ($resorder) {
5383: my @resorder=split(/,/,$resorder);
5384: foreach my $part (keys(%responseIdHash)) {
5385: my $i=0;
5386: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
5387: my @neworder;
5388: foreach my $possibleid (@resorder) {
5389: if (exists($resids{$possibleid})) {
5390: push(@neworder,$resids{$possibleid});
5391: }
5392: }
5393: my @ids;
5394: my @type;
5395: foreach my $element (@neworder) {
5396: push (@ids,$responseIdHash{$part}->[$element]);
5397: push (@type,$responseTypeHash{$part}->[$element]);
5398: }
5399: $responseIdHash{$part}=\@ids;
5400: $responseTypeHash{$part}=\@type;
5401: }
5402: }
5403: $self->{RESPONSE_IDS} = \%responseIdHash;
5404: $self->{RESPONSE_TYPES} = \%responseTypeHash;
5405: }
5406:
5407: return;
5408: }
5409:
5410: =pod
5411:
5412: =head2 Resource Status
5413:
5414: Problem resources have status information, reflecting their various
5415: dates and completion statuses.
5416:
5417: There are two aspects to the status: the date-related information and
5418: the completion information.
5419:
5420: Idiomatic usage of these two methods would probably look something
5421: like
5422:
5423: foreach my $part ($resource->parts()) {
5424: my $dateStatus = $resource->getDateStatus($part);
5425: my $completionStatus = $resource->getCompletionStatus($part);
5426:
5427: or
5428:
5429: my $status = $resource->status($part);
5430:
5431: ... use it here ...
5432: }
5433:
5434: Which you use depends on exactly what you are looking for. The
5435: status() function has been optimized for the nav maps display and may
5436: not precisely match what you need elsewhere.
5437:
5438: The symbolic constants shown below can be accessed through the
5439: resource object: C<$res->OPEN>.
5440:
5441: =over 4
5442:
5443: =item * B<getDateStatus>($part):
5444:
5445: ($part defaults to 0). A convenience function that returns a symbolic
5446: constant telling you about the date status of the part. The possible
5447: return values are:
5448:
5449: =back
5450:
5451: B<Date Codes>
5452:
5453: =over 4
5454:
5455: =item * B<OPEN_LATER>:
5456:
5457: The problem will be opened later.
5458:
5459: =item * B<OPEN>:
5460:
5461: Open and not yet due.
5462:
5463:
5464: =item * B<PAST_DUE_ANSWER_LATER>:
5465:
5466: The due date has passed, but the answer date has not yet arrived.
5467:
5468: =item * B<PAST_DUE_NO_ANSWER>:
5469:
5470: The due date has passed and there is no answer opening date set.
5471:
5472: =item * B<ANSWER_OPEN>:
5473:
5474: The answer date is here.
5475:
5476: =item * B<NETWORK_FAILURE>:
5477:
5478: The information is unknown due to network failure.
5479:
5480: =back
5481:
5482: =cut
5483:
5484: # Apparently the compiler optimizes these into constants automatically
5485: sub OPEN_LATER { return 0; }
5486: sub OPEN { return 1; }
5487: sub PAST_DUE_NO_ANSWER { return 2; }
5488: sub PAST_DUE_ANSWER_LATER { return 3; }
5489: sub ANSWER_OPEN { return 4; }
5490: sub NOTHING_SET { return 5; }
5491: sub NETWORK_FAILURE { return 100; }
5492:
5493: # getDateStatus gets the date status for a given problem part.
5494: # Because answer date, due date, and open date are fully independent
5495: # (i.e., it is perfectly possible to *only* have an answer date),
5496: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
5497: # (past, future, none given). This function handles this with a decision
5498: # tree. Read the comments to follow the decision tree.
5499:
5500: sub getDateStatus {
5501: my $self = shift;
5502: my $part = shift;
5503: $part = "0" if (!defined($part));
5504:
5505: # Always return network failure if there was one.
5506: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5507:
5508: my $now = time();
5509:
5510: my $open = $self->opendate($part);
5511: my $due = $self->duedate($part);
5512: my $answer = $self->answerdate($part);
5513:
5514: if (!$open && !$due && !$answer) {
5515: # no data on the problem at all
5516: # should this be the same as "open later"? think multipart.
5517: return $self->NOTHING_SET;
5518: }
5519: if (!$open || $now < $open) {return $self->OPEN_LATER}
5520: if (!$due || $now < $due) {return $self->OPEN}
5521: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
5522: if ($answer) { return $self->ANSWER_OPEN; }
5523: return PAST_DUE_NO_ANSWER;
5524: }
5525:
5526: =pod
5527:
5528: B<>
5529:
5530: =over 4
5531:
5532: =item * B<getCompletionStatus>($part):
5533:
5534: ($part defaults to 0.) A convenience function that returns a symbolic
5535: constant telling you about the completion status of the part, with the
5536: following possible results:
5537:
5538: =back
5539:
5540: B<Completion Codes>
5541:
5542: =over 4
5543:
5544: =item * B<NOT_ATTEMPTED>:
5545:
5546: Has not been attempted at all.
5547:
5548: =item * B<INCORRECT>:
5549:
5550: Attempted, but wrong by student.
5551:
5552: =item * B<INCORRECT_BY_OVERRIDE>:
5553:
5554: Attempted, but wrong by instructor override.
5555:
5556: =item * B<CORRECT>:
5557:
5558: Correct or correct by instructor.
5559:
5560: =item * B<CORRECT_BY_OVERRIDE>:
5561:
5562: Correct by instructor override.
5563:
5564: =item * B<EXCUSED>:
5565:
5566: Excused. Not yet implemented.
5567:
5568: =item * B<NETWORK_FAILURE>:
5569:
5570: Information not available due to network failure.
5571:
5572: =item * B<ATTEMPTED>:
5573:
5574: Attempted, and not yet graded.
5575:
5576: =item * B<CREDIT_ATTEMPTED>:
5577:
5578: Attempted, and credit received for attempt (survey and anonymous survey only).
5579:
5580: =item * B<INCORRECT_BY_PASSBACK>:
5581:
5582: Attempted, but wrong for LTI Tool Provider by passback of grade
5583:
5584: =item * B<CORRECT_BY_PASSBACK>:
5585:
5586: Correct for LTI Tool Provider by passback of grade
5587:
5588: =back
5589:
5590: =cut
5591:
5592: sub NOT_ATTEMPTED { return 10; }
5593: sub INCORRECT { return 11; }
5594: sub INCORRECT_BY_OVERRIDE { return 12; }
5595: sub CORRECT { return 13; }
5596: sub CORRECT_BY_OVERRIDE { return 14; }
5597: sub EXCUSED { return 15; }
5598: sub ATTEMPTED { return 16; }
5599: sub CREDIT_ATTEMPTED { return 17; }
5600: sub INCORRECT_BY_PASSBACK { return 18; }
5601: sub CORRECT_BY_PASSBACK { return 19; }
5602:
5603: sub getCompletionStatus {
5604: my $self = shift;
5605: my $part = shift;
5606: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5607:
5608: my $status = $self->queryRestoreHash('solved', $part);
5609:
5610: # Left as separate if statements in case we ever do more with this
5611: if ($status eq 'correct_by_student') {return $self->CORRECT;}
5612: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
5613: if ($status eq 'correct_by_override') {
5614: return $self->CORRECT_BY_OVERRIDE;
5615: }
5616: if ($status eq 'correct_by_passback') {
5617: return $self->CORRECT_BY_PASSBACK;
5618: }
5619: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
5620: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
5621: if ($status eq 'incorrect_by_passback') {return $self->INCORRECT_BY_PASSBACK; }
5622: if ($status eq 'excused') {return $self->EXCUSED; }
5623: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
5624: if ($status eq 'credit_attempted') {
5625: if ($self->is_anonsurvey($part) || $self->is_survey($part)) {
5626: return $self->CREDIT_ATTEMPTED;
5627: } else {
5628: return $self->ATTEMPTED;
5629: }
5630: }
5631: return $self->NOT_ATTEMPTED;
5632: }
5633:
5634: sub queryRestoreHash {
5635: my $self = shift;
5636: my $hashentry = shift;
5637: my $part = shift;
5638: $part = "0" if (!defined($part) || $part eq '');
5639: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5640:
5641: $self->getReturnHash();
5642:
5643: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
5644: }
5645:
5646: =pod
5647:
5648: B<Composite Status>
5649:
5650: Along with directly returning the date or completion status, the
5651: resource object includes a convenience function B<status>() that will
5652: combine the two status tidbits into one composite status that can
5653: represent the status of the resource as a whole. This method represents
5654: the concept of the thing we want to display to the user on the nav maps
5655: screen, which is a combination of completion and open status. The precise logic is
5656: documented in the comments of the status method. The following results
5657: may be returned, all available as methods on the resource object
5658: ($res->NETWORK_FAILURE): In addition to the return values that match
5659: the date or completion status, this function can return "ANSWER_SUBMITTED"
5660: if that problemstatus parameter value is set to No, suppressing the
5661: incorrect/correct feedback.
5662:
5663: =over 4
5664:
5665: =item * B<NETWORK_FAILURE>:
5666:
5667: The network has failed and the information is not available.
5668:
5669: =item * B<NOTHING_SET>:
5670:
5671: No dates have been set for this problem (part) at all. (Because only
5672: certain parts of a multi-part problem may be assigned, this can not be
5673: collapsed into "open later", as we do not know a given part will EVER
5674: be opened. For single part, this is the same as "OPEN_LATER".)
5675:
5676: =item * B<CORRECT>:
5677:
5678: For any reason at all, the part is considered correct.
5679:
5680: =item * B<EXCUSED>:
5681:
5682: For any reason at all, the problem is excused.
5683:
5684: =item * B<PAST_DUE_NO_ANSWER>:
5685:
5686: The problem is past due, not considered correct, and no answer date is
5687: set.
5688:
5689: =item * B<PAST_DUE_ANSWER_LATER>:
5690:
5691: The problem is past due, not considered correct, and an answer date in
5692: the future is set.
5693:
5694: =item * B<ANSWER_OPEN>:
5695:
5696: The problem is past due, not correct, and the answer is now available.
5697:
5698: =item * B<OPEN_LATER>:
5699:
5700: The problem is not yet open.
5701:
5702: =item * B<TRIES_LEFT>:
5703:
5704: The problem is open, has been tried, is not correct, but there are
5705: tries left.
5706:
5707: =item * B<INCORRECT>:
5708:
5709: The problem is open, and all tries have been used without getting the
5710: correct answer.
5711:
5712: =item * B<OPEN>:
5713:
5714: The item is open and not yet tried.
5715:
5716: =item * B<ATTEMPTED>:
5717:
5718: The problem has been attempted.
5719:
5720: =item * B<CREDIT_ATTEMPTED>:
5721:
5722: The problem has been attempted, and credit given for the attempt (survey and anonymous survey only).
5723:
5724: =item * B<ANSWER_SUBMITTED>:
5725:
5726: An answer has been submitted, but the student should not see it.
5727:
5728: =back
5729:
5730: =cut
5731:
5732: sub TRIES_LEFT { return 20; }
5733: sub ANSWER_SUBMITTED { return 21; }
5734: sub PARTIALLY_CORRECT { return 22; }
5735:
5736: sub RESERVED_LATER { return 30; }
5737: sub RESERVED { return 31; }
5738: sub RESERVED_LOCATION { return 32; }
5739: sub RESERVABLE { return 33; }
5740: sub RESERVABLE_LATER { return 34; }
5741: sub NOTRESERVABLE { return 35; }
5742: sub NOT_IN_A_SLOT { return 36; }
5743: sub NEEDS_CHECKIN { return 37; }
5744: sub WAITING_FOR_GRADE { return 38; }
5745: sub UNKNOWN { return 39; }
5746:
5747: sub status {
5748: my $self = shift;
5749: my $part = shift;
5750: if (!defined($part)) { $part = "0"; }
5751: my $completionStatus = $self->getCompletionStatus($part);
5752: my $dateStatus = $self->getDateStatus($part);
5753:
5754: # What we have is a two-dimensional matrix with 4 entries on one
5755: # dimension and 5 entries on the other, which we want to colorize,
5756: # plus network failure and "no date data at all".
5757:
5758: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
5759: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
5760:
5761: my $suppressFeedback = 0;
5762: if (($self->problemstatus($part) eq 'no') ||
5763: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5764: $suppressFeedback = 1;
5765: }
5766: # If there's an answer date and we're past it, don't
5767: # suppress the feedback; student should know
5768: if ($self->duedate($part) && $self->duedate($part) < time() &&
5769: $self->answerdate($part) && $self->answerdate($part) < time()) {
5770: $suppressFeedback = 0;
5771: }
5772:
5773: # There are a few whole rows we can dispose of:
5774: if ($completionStatus == CORRECT ||
5775: $completionStatus == CORRECT_BY_OVERRIDE ||
5776: $completionStatus == CORRECT_BY_PASSBACK ) {
5777: if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
5778: my $awarded=$self->awarded($part);
5779: if ($awarded < 1 && $awarded > 0) {
5780: return PARTIALLY_CORRECT;
5781: } elsif ($awarded<1) {
5782: return INCORRECT;
5783: }
5784: return CORRECT;
5785: }
5786:
5787: # If it's WRONG... and not open
5788: if ( ($completionStatus == INCORRECT ||
5789: $completionStatus == INCORRECT_BY_OVERRIDE ||
5790: $completionStatus == INCORRECT_BY_PASSBACK)
5791: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
5792: return INCORRECT;
5793: }
5794:
5795: if ($completionStatus == ATTEMPTED) {
5796: return ATTEMPTED;
5797: }
5798:
5799: if ($completionStatus == CREDIT_ATTEMPTED) {
5800: return CREDIT_ATTEMPTED;
5801: }
5802:
5803: # If it's EXCUSED, then return that no matter what
5804: if ($completionStatus == EXCUSED) {
5805: return EXCUSED;
5806: }
5807:
5808: if ($dateStatus == NOTHING_SET) {
5809: return NOTHING_SET;
5810: }
5811:
5812: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
5813: # by 4 matrix (date statuses).
5814:
5815: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
5816: $dateStatus == PAST_DUE_NO_ANSWER ) {
5817: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
5818: }
5819:
5820: if ($dateStatus == ANSWER_OPEN) {
5821: return ANSWER_OPEN;
5822: }
5823:
5824: # Now: (incorrect, incorrect_override, not_attempted) x
5825: # (open_later), (open)
5826:
5827: if ($dateStatus == OPEN_LATER) {
5828: return OPEN_LATER;
5829: }
5830:
5831: # If it's WRONG...
5832: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE ||
5833: $completionStatus == INCORRECT_BY_PASSBACK) {
5834: # and there are TRIES LEFT:
5835: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
5836: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
5837: }
5838: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
5839: }
5840:
5841: # Otherwise, it's untried and open
5842: return OPEN;
5843: }
5844:
5845: sub check_for_slot {
5846: my $self = shift;
5847: my $part = shift;
5848: my $symb = $self->{SYMB};
5849: my ($use_slots,$available,$availablestudent) = $self->slot_control($part);
5850: if (($use_slots ne '') && ($use_slots !~ /^\s*no\s*$/i)) {
5851: my @slots = (split(/:/,$availablestudent),split(/:/,$available));
5852: my $cid=$env{'request.course.id'};
5853: my $cdom=$env{'course.'.$cid.'.domain'};
5854: my $cnum=$env{'course.'.$cid.'.num'};
5855: my $now = time;
5856: my $num_usable_slots = 0;
5857: my ($checkedin,$checkedinslot,%consumed_uniq,%slots);
5858: if (@slots > 0) {
5859: %slots=&Apache::lonnet::get('slots',[@slots],$cdom,$cnum);
5860: if (&Apache::lonnet::error(%slots)) {
5861: return (UNKNOWN);
5862: }
5863: my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots,'starttime');
5864: foreach my $slot_name (@sorted_slots) {
5865: next if (!defined($slots{$slot_name}) || !ref($slots{$slot_name}));
5866: my $end = $slots{$slot_name}->{'endtime'};
5867: my $start = $slots{$slot_name}->{'starttime'};
5868: my $ip = $slots{$slot_name}->{'ip'};
5869: if ($self->simpleStatus() == OPEN) {
5870: if ($end > $now) {
5871: if ($start > $now) {
5872: return (RESERVED_LATER,$start,$slot_name);
5873: } else {
5874: if ($ip ne '') {
5875: if (!&Apache::loncommon::check_ip_acc($ip)) {
5876: return (RESERVED_LOCATION,$end,$slot_name);
5877: }
5878: }
5879: my @proctors;
5880: if ($slots{$slot_name}->{'proctor'} ne '') {
5881: @proctors = split(',',$slots{$slot_name}->{'proctor'});
5882: }
5883: if (@proctors > 0) {
5884: ($checkedin,$checkedinslot) = $self->checkedin();
5885: unless ((grep(/^\Q$checkedin\E/,@proctors)) &&
5886: ($checkedinslot eq $slot_name)) {
5887: return (NEEDS_CHECKIN,$end,$slot_name);
5888: }
5889: }
5890: return (RESERVED,$end,$slot_name);
5891: }
5892: }
5893: } elsif ($end > $now) {
5894: $num_usable_slots ++;
5895: }
5896: }
5897: my ($is_correct,$wait_for_grade);
5898: if ($self->is_task()) {
5899: my $taskstatus = $self->taskstatus();
5900: $is_correct = (($taskstatus eq 'pass') ||
5901: ($self->solved() =~ /^correct_/));
5902: unless ($taskstatus =~ /^(?:pass|fail)$/) {
5903: $wait_for_grade = 1;
5904: }
5905: } else {
5906: unless ($self->completable()) {
5907: $wait_for_grade = 1;
5908: }
5909: unless (($self->problemstatus($part) eq 'no') ||
5910: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5911: $is_correct = ($self->solved($part) =~ /^correct_/);
5912: $wait_for_grade = 0;
5913: }
5914: }
5915: ($checkedin,$checkedinslot) = $self->checkedin();
5916: if ($checkedin) {
5917: if (ref($slots{$checkedinslot}) eq 'HASH') {
5918: $consumed_uniq{$checkedinslot} = $slots{$checkedinslot}{'uniqueperiod'};
5919: }
5920: if ($wait_for_grade) {
5921: return (WAITING_FOR_GRADE);
5922: } elsif ($is_correct) {
5923: return (CORRECT);
5924: }
5925: }
5926: if ($num_usable_slots) {
5927: return(NOT_IN_A_SLOT);
5928: }
5929: }
5930: my $reservable = &Apache::lonnet::get_reservable_slots($cnum,$cdom,$env{'user.name'},
5931: $env{'user.domain'});
5932: if (ref($reservable) eq 'HASH') {
5933: my ($map) = &Apache::lonnet::decode_symb($symb);
5934: if ((ref($reservable->{'now_order'}) eq 'ARRAY') && (ref($reservable->{'now'}) eq 'HASH')) {
5935: foreach my $slot (reverse (@{$reservable->{'now_order'}})) {
5936: my $canuse;
5937: if ($reservable->{'now'}{$slot}{'symb'} eq '') {
5938: $canuse = 1;
5939: } else {
5940: my %oksymbs;
5941: my @slotsymbs = split(/\s*,\s*/,$reservable->{'now'}{$slot}{'symb'});
5942: map { $oksymbs{$_} = 1; } @slotsymbs;
5943: if ($oksymbs{$symb}) {
5944: $canuse = 1;
5945: } else {
5946: foreach my $item (@slotsymbs) {
5947: if ($item =~ /\.(page|sequence)$/) {
5948: (undef,undef, my $sloturl) = &Apache::lonnet::decode_symb($item);
5949: if (($map ne '') && ($map eq $sloturl)) {
5950: $canuse = 1;
5951: last;
5952: }
5953: }
5954: }
5955: }
5956: }
5957: if ($canuse) {
5958: if ($checkedin) {
5959: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5960: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5961: if ($reservable->{'now'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5962: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5963: next if (!
5964: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5965: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5966: }
5967: }
5968: }
5969: return(RESERVABLE,$reservable->{'now'}{$slot}{'endreserve'});
5970: }
5971: }
5972: }
5973: if ((ref($reservable->{'future_order'}) eq 'ARRAY') && (ref($reservable->{'future'}) eq 'HASH')) {
5974: foreach my $slot (@{$reservable->{'future_order'}}) {
5975: my $canuse;
5976: if ($reservable->{'future'}{$slot}{'symb'} eq '') {
5977: $canuse = 1;
5978: } elsif ($reservable->{'future'}{$slot}{'symb'} =~ /,/) {
5979: my %oksymbs;
5980: my @slotsymbs = split(/\s*,\s*/,$reservable->{'future'}{$slot}{'symb'});
5981: map { $oksymbs{$_} = 1; } @slotsymbs;
5982: if ($oksymbs{$symb}) {
5983: $canuse = 1;
5984: } else {
5985: foreach my $item (@slotsymbs) {
5986: if ($item =~ /\.(page|sequence)$/) {
5987: (undef,undef, my $sloturl) = &Apache::lonnet::decode_symb($item);
5988: if (($map ne '') && ($map eq $sloturl)) {
5989: $canuse = 1;
5990: last;
5991: }
5992: }
5993: }
5994: }
5995: } elsif ($reservable->{'future'}{$slot}{'symb'} eq $symb) {
5996: $canuse = 1;
5997: }
5998: if ($canuse) {
5999: if ($checkedin) {
6000: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
6001: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
6002: if ($reservable->{'future'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
6003: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
6004: next if (!
6005: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
6006: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
6007: }
6008: }
6009: }
6010: return(RESERVABLE_LATER,$reservable->{'future'}{$slot}{'startreserve'});
6011: }
6012: }
6013: }
6014: }
6015: return(NOTRESERVABLE);
6016: }
6017: return;
6018: }
6019:
6020: sub CLOSED { return 23; }
6021: sub ERROR { return 24; }
6022:
6023: =pod
6024:
6025: B<Simple Status>
6026:
6027: Convenience method B<simpleStatus> provides a "simple status" for the resource.
6028: "Simple status" corresponds to "which icon is shown on the
6029: Navmaps". There are six "simple" statuses:
6030:
6031: =over 4
6032:
6033: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
6034:
6035: =item * B<OPEN>: The problem is open and unattempted.
6036:
6037: =item * B<CORRECT>: The problem is correct for any reason.
6038:
6039: =item * B<INCORRECT>: The problem is incorrect and can still be
6040: completed successfully.
6041:
6042: =item * B<ATTEMPTED>: The problem has been attempted, but the student
6043: does not know if they are correct. (The ellipsis icon.)
6044:
6045: =item * B<ERROR>: There is an error retrieving information about this
6046: problem.
6047:
6048: =back
6049:
6050: =cut
6051:
6052: # This hash maps the composite status to this simple status, and
6053: # can be used directly, if you like
6054: my %compositeToSimple =
6055: (
6056: NETWORK_FAILURE() => ERROR,
6057: NOTHING_SET() => CLOSED,
6058: CORRECT() => CORRECT,
6059: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
6060: EXCUSED() => CORRECT,
6061: PAST_DUE_NO_ANSWER() => INCORRECT,
6062: PAST_DUE_ANSWER_LATER() => INCORRECT,
6063: ANSWER_OPEN() => INCORRECT,
6064: OPEN_LATER() => CLOSED,
6065: TRIES_LEFT() => OPEN,
6066: INCORRECT() => INCORRECT,
6067: OPEN() => OPEN,
6068: ATTEMPTED() => ATTEMPTED,
6069: CREDIT_ATTEMPTED() => CORRECT,
6070: ANSWER_SUBMITTED() => ATTEMPTED
6071: );
6072:
6073: sub simpleStatus {
6074: my $self = shift;
6075: my $part = shift;
6076: my $status = $self->status($part);
6077: return $compositeToSimple{$status};
6078: }
6079:
6080: =pod
6081:
6082: B<simpleStatusCount> will return an array reference containing, in
6083: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
6084: and ERROR parts the given problem has.
6085:
6086: =cut
6087:
6088: # This maps the status to the slot we want to increment
6089: my %statusToSlotMap =
6090: (
6091: OPEN() => 0,
6092: CLOSED() => 1,
6093: CORRECT() => 2,
6094: INCORRECT() => 3,
6095: ATTEMPTED() => 4,
6096: ERROR() => 5
6097: );
6098:
6099: sub statusToSlot { return $statusToSlotMap{shift()}; }
6100:
6101: sub simpleStatusCount {
6102: my $self = shift;
6103:
6104: my @counts = (0, 0, 0, 0, 0, 0, 0);
6105: foreach my $part (@{$self->parts()}) {
6106: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
6107: }
6108:
6109: return \@counts;
6110: }
6111:
6112: =pod
6113:
6114: B<Completable>
6115:
6116: The completable method represents the concept of I<whether the student can
6117: currently do the problem>. If the student can do the problem, which means
6118: that it is open, there are tries left, and if the problem is manually graded
6119: or the grade is suppressed via problemstatus, the student has not tried it
6120: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
6121: either the student has tried it and there is no feedback, or that for
6122: some reason it is no longer completable (not open yet, successfully completed,
6123: out of tries, etc.). As an example, this is used as the filter for the
6124: "Uncompleted Homework" option for the nav maps.
6125:
6126: If this does not quite meet your needs, do not fiddle with it (unless you are
6127: fixing it to better match the student's conception of "completable" because
6128: it's broken somehow)... make a new method.
6129:
6130: =cut
6131:
6132: sub completable {
6133: my $self = shift;
6134: if (!$self->is_problem()) { return 0; }
6135: my $partCount = $self->countParts();
6136:
6137: foreach my $part (@{$self->parts()}) {
6138: if ($part eq '0' && $partCount != 1) { next; }
6139: my $status = $self->status($part);
6140: # "If any of the parts are open, or have tries left (implies open),
6141: # and it is not "attempted" (manually graded problem), it is
6142: # not "complete"
6143: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
6144: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
6145: $status == ANSWER_SUBMITTED() ) {
6146: # did this part already, as well as we can
6147: next;
6148: }
6149: if ($status == OPEN() || $status == TRIES_LEFT()) {
6150: return 1;
6151: }
6152: }
6153:
6154: # If all the parts were complete, so was this problem.
6155: return 0;
6156: }
6157:
6158: =pod
6159:
6160: B<Answerable>
6161:
6162: The answerable method differs from the completable method in its handling of problem parts
6163: for which feedback on correctness is suppressed, but the student still has tries left, and
6164: the problem part is not past due, (i.e., the student could submit a different answer if
6165: he/she so chose). For that case completable will return 0, whereas answerable will return 1.
6166:
6167: =cut
6168:
6169: sub answerable {
6170: my $self = shift;
6171: if (!$self->is_problem()) { return 0; }
6172: my $partCount = $self->countParts();
6173: foreach my $part (@{$self->parts()}) {
6174: if ($part eq '0' && $partCount != 1) { next; }
6175: my $status = $self->status($part);
6176: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
6177: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
6178: $status == ANSWER_SUBMITTED() ) {
6179: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
6180: return 1;
6181: }
6182: }
6183: if ($status == OPEN() || $status == TRIES_LEFT() || $status == NETWORK_FAILURE()) {
6184: return 1;
6185: }
6186: }
6187: # None of the parts were answerable, so neither is this problem.
6188: return 0;
6189: }
6190:
6191: =pod
6192:
6193: =head2 Resource/Nav Map Navigation
6194:
6195: =over 4
6196:
6197: =item * B<getNext>():
6198:
6199: Retreive an array of the possible next resources after this
6200: one. Always returns an array, even in the one- or zero-element case.
6201:
6202: =item * B<getPrevious>():
6203:
6204: Retreive an array of the possible previous resources from this
6205: one. Always returns an array, even in the one- or zero-element case.
6206:
6207: =cut
6208:
6209: sub getNext {
6210: my $self = shift;
6211: my @branches;
6212: my $to = $self->to();
6213: foreach my $branch ( split(/,/, $to) ) {
6214: my $choice = $self->{NAV_MAP}->getById($branch);
6215: #if (!$choice->condition()) { next; }
6216: my $next = $choice->goesto();
6217: $next = $self->{NAV_MAP}->getById($next);
6218:
6219: push @branches, $next;
6220: }
6221: return \@branches;
6222: }
6223:
6224: sub getPrevious {
6225: my $self = shift;
6226: my @branches;
6227: my $from = $self->from();
6228: foreach my $branch ( split(/,/, $from)) {
6229: my $choice = $self->{NAV_MAP}->getById($branch);
6230: my $prev = $choice->comesfrom();
6231: $prev = $self->{NAV_MAP}->getById($prev);
6232:
6233: push @branches, $prev;
6234: }
6235: return \@branches;
6236: }
6237:
6238: sub browsePriv {
6239: my $self = shift;
6240: my $noblockcheck = shift;
6241: if (defined($self->{BROWSE_PRIV})) {
6242: return $self->{BROWSE_PRIV};
6243: }
6244:
6245: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
6246: $self->{SYMB},undef,
6247: undef,$noblockcheck);
6248: }
6249:
6250: =pod
6251:
6252: =back
6253:
6254: =cut
6255:
6256: 1;
6257:
6258: __END__
6259:
6260:
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