1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
3: #
4: # $Id: lonnavmaps.pm,v 1.509.2.14.2.2 2022/01/05 00:41:13 raeburn Exp $
5:
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: ###
30:
31: =pod
32:
33: =head1 NAME
34:
35: Apache::lonnavmaps - Subroutines to handle and render the navigation
36:
37: =head1 SYNOPSIS
38:
39: Handles navigational maps.
40:
41: The main handler generates the navigational listing for the course,
42: the other objects export this information in a usable fashion for
43: other modules.
44:
45:
46: This is part of the LearningOnline Network with CAPA project
47: described at http://www.lon-capa.org.
48:
49:
50: =head1 OVERVIEW
51:
52: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
53: course structure and caches it in what is often referred to as the
54: "big hash" X<big hash>. You can see it if you are logged into
55: LON-CAPA, in a course, by going to /adm/test. (You may need to
56: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
57: content of the hash will be under the heading "Big Hash".
58:
59: Big Hash contains, among other things, how resources are related
60: to each other (next/previous), what resources are maps, which
61: resources are being chosen to not show to the student (for random
62: selection), and a lot of other things that can take a lot of time
63: to compute due to the amount of data that needs to be collected and
64: processed.
65:
66: Apache::lonnavmaps provides an object model for manipulating this
67: information in a higher-level fashion than directly manipulating
68: the hash. It also provides access to several auxilary functions
69: that aren't necessarily stored in the Big Hash, but are a per-
70: resource sort of value, like whether there is any feedback on
71: a given resource.
72:
73: Apache::lonnavmaps also abstracts away branching, and someday,
74: conditions, for the times where you don't really care about those
75: things.
76:
77: Apache::lonnavmaps also provides fairly powerful routines for
78: rendering navmaps, and last but not least, provides the navmaps
79: view for when the user clicks the NAV button.
80:
81: B<Note>: Apache::lonnavmaps I<only> works for the "currently
82: logged in user"; if you want things like "due dates for another
83: student" lonnavmaps can not directly retrieve information like
84: that. You need the EXT function. This module can still help,
85: because many things, such as the course structure, are constant
86: between users, and Apache::lonnavmaps can help by providing
87: symbs for the EXT call.
88:
89: The rest of this file will cover the provided rendering routines,
90: which can often be used without fiddling with the navmap object at
91: all, then documents the Apache::lonnavmaps::navmap object, which
92: is the key to accessing the Big Hash information, covers the use
93: of the Iterator (which provides the logic for traversing the
94: somewhat-complicated Big Hash data structure), documents the
95: Apache::lonnavmaps::Resource objects that are returned by
96:
97: =head1 Subroutine: render
98:
99: The navmap renderer package provides a sophisticated rendering of the
100: standard navigation maps interface into HTML. The provided nav map
101: handler is actually just a glorified call to this.
102:
103: Because of the large number of parameters this function accepts,
104: instead of passing it arguments as is normal, pass it in an anonymous
105: hash with the desired options.
106:
107: The package provides a function called 'render', called as
108: Apache::lonnavmaps::render({}).
109:
110: =head2 Overview of Columns
111:
112: The renderer will build an HTML table for the navmap and return
113: it. The table consists of several columns, and a row for each
114: resource (or possibly each part). You tell the renderer how many
115: columns to create and what to place in each column, optionally using
116: one or more of the prepared columns, and the renderer will assemble
117: the table.
118:
119: Any additional generally useful column types should be placed in the
120: renderer code here, so anybody can use it anywhere else. Any code
121: specific to the current application (such as the addition of <input>
122: elements in a column) should be placed in the code of the thing using
123: the renderer.
124:
125: At the core of the renderer is the array reference COLS (see Example
126: section below for how to pass this correctly). The COLS array will
127: consist of entries of one of two types of things: Either an integer
128: representing one of the pre-packaged column types, or a sub reference
129: that takes a resource reference, a part number, and a reference to the
130: argument hash passed to the renderer, and returns a string that will
131: be inserted into the HTML representation as it.
132:
133: All other parameters are ways of either changing how the columns
134: are printing, or which rows are shown.
135:
136: The pre-packaged column names are refered to by constants in the
137: Apache::lonnavmaps namespace. The following currently exist:
138:
139: =over 4
140:
141: =item * B<Apache::lonnavmaps::resource>:
142:
143: The general info about the resource: Link, icon for the type, etc. The
144: first column in the standard nav map display. This column provides the
145: indentation effect seen in the B<NAV> screen. This column also accepts
146: the following parameters in the renderer hash:
147:
148: =over 4
149:
150: =item * B<resource_nolink>: default false
151:
152: If true, the resource will not be linked. By default, all non-folder
153: resources are linked.
154:
155: =item * B<resource_part_count>: default true
156:
157: If true, the resource will show a part count B<if> the full
158: part list is not displayed. (See "condense_parts" later.) If false,
159: the resource will never show a part count.
160:
161: =item * B<resource_no_folder_link>:
162:
163: If true, the resource's folder will not be clickable to open or close
164: it. Default is false. True implies printCloseAll is false, since you
165: can't close or open folders when this is on anyhow.
166:
167: =item * B<map_no_edit_link>:
168:
169: If true, the title of the folder or page will not be followed by an
170: icon/link to direct editing of a folder or composite page, originally
171: added via the Course Editor.
172:
173: =back
174:
175: =item * B<Apache::lonnavmaps::communication_status>:
176:
177: Whether there is discussion on the resource, email for the user, or
178: (lumped in here) perl errors in the execution of the problem. This is
179: the second column in the main nav map.
180:
181: =item * B<Apache::lonnavmaps::quick_status>:
182:
183: An icon for the status of a problem, with five possible states:
184: Correct, incorrect, open, awaiting grading (for a problem where the
185: computer's grade is suppressed, or the computer can't grade, like
186: essay problem), or none (not open yet, not a problem). The
187: third column of the standard navmap.
188:
189: =item * B<Apache::lonnavmaps::long_status>:
190:
191: A text readout of the details of the current status of the problem,
192: such as "Due in 22 hours". The fourth column of the standard navmap.
193:
194: =item * B<Apache::lonnavmaps::part_status_summary>:
195:
196: A text readout summarizing the status of the problem. If it is a
197: single part problem, will display "Correct", "Incorrect",
198: "Not yet open", "Open", "Attempted", or "Error". If there are
199: multiple parts, this will output a string that in HTML will show a
200: status of how many parts are in each status, in color coding, trying
201: to match the colors of the icons within reason.
202:
203: Note this only makes sense if you are I<not> showing parts. If
204: C<showParts> is true (see below), this column will not output
205: anything.
206:
207: =back
208:
209: If you add any others please be sure to document them here.
210:
211: An example of a column renderer that will show the ID number of a
212: resource, along with the part name if any:
213:
214: sub {
215: my ($resource, $part, $params) = @_;
216: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
217: return '<td>' . $resource->{ID} . '</td>';
218: }
219:
220: Note these functions are responsible for the TD tags, which allow them
221: to override vertical and horizontal alignment, etc.
222:
223: =head2 Parameters
224:
225: Minimally, you should be
226: able to get away with just using 'cols' (to specify the columns
227: shown), 'url' (necessary for the folders to link to the current screen
228: correctly), and possibly 'queryString' if your app calls for it. In
229: that case, maintaining the state of the folders will be done
230: automatically.
231:
232: =over 4
233:
234: =item * B<iterator>: default: constructs one from %env
235:
236: A reference to a fresh ::iterator to use from the navmaps. The
237: rendering will reflect the options passed to the iterator, so you can
238: use that to just render a certain part of the course, if you like. If
239: one is not passed, the renderer will attempt to construct one from
240: env{'form.filter'} and env{'form.condition'} information, plus the
241: 'iterator_map' parameter if any.
242:
243: =item * B<iterator_map>: default: not used
244:
245: If you are letting the renderer do the iterator handling, you can
246: instruct the renderer to render only a particular map by passing it
247: the source of the map you want to process, like
248: '/res/103/jerf/navmap.course.sequence'.
249:
250: =item * B<include_top_level_map>: default: false
251:
252: If you need to include the top level map (meaning the course) in the
253: rendered output set this to true
254:
255: =item * B<navmap>: default: constructs one from %env
256:
257: A reference to a navmap, used only if an iterator is not passed in. If
258: this is necessary to make an iterator but it is not passed in, a new
259: one will be constructed based on env info. This is useful to do basic
260: error checking before passing it off to render.
261:
262: =item * B<r>: default: must be passed in
263:
264: The standard Apache response object. This must be passed to the
265: renderer or the course hash will be locked.
266:
267: =item * B<cols>: default: empty (useless)
268:
269: An array reference
270:
271: =item * B<showParts>:default true
272:
273: A flag. If true, a line for the resource itself, and a line
274: for each part will be displayed. If not, only one line for each
275: resource will be displayed.
276:
277: =item * B<condenseParts>: default true
278:
279: A flag. If true, if all parts of the problem have the same
280: status and that status is Nothing Set, Correct, or Network Failure,
281: then only one line will be displayed for that resource anyhow. If no,
282: all parts will always be displayed. If showParts is 0, this is
283: ignored.
284:
285: =item * B<jumpCount>: default: determined from %env
286:
287: A string identifying the URL to place the anchor 'curloc' at.
288: It is the responsibility of the renderer user to
289: ensure that the #curloc is in the URL. By default, determined through
290: the use of the env{} 'jump' information, and should normally "just
291: work" correctly.
292:
293: =item * B<here>: default: empty string
294:
295: A Symb identifying where to place the 'here' marker. The empty
296: string means no marker.
297:
298: =item * B<indentString>: default: 25 pixel whitespace image
299:
300: A string identifying the indentation string to use.
301:
302: =item * B<queryString>: default: empty
303:
304: A string which will be prepended to the query string used when the
305: folders are opened or closed. You can use this to pass
306: application-specific values.
307:
308: =item * B<url>: default: none
309:
310: The url the folders will link to, which should be the current
311: page. Required if the resource info column is shown, and you
312: are allowing the user to open and close folders.
313:
314: =item * B<currentJumpIndex>: default: no jumping
315:
316: Describes the currently-open row number to cause the browser to jump
317: to, because the user just opened that folder. By default, pulled from
318: the Jump information in the env{'form.*'}.
319:
320: =item * B<printKey>: default: false
321:
322: If true, print the key that appears on the top of the standard
323: navmaps.
324:
325: =item * B<printCloseAll>: default: true
326:
327: If true, print the "Close all folders" or "open all folders"
328: links.
329:
330: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
331:
332: A function that takes the resource object as its only parameter and
333: returns a true or false value. If true, the resource is displayed. If
334: false, it is simply skipped in the display.
335:
336: =item * B<suppressEmptySequences>: default: false
337:
338: If you're using a filter function, and displaying sequences to orient
339: the user, then frequently some sequences will be empty. Setting this to
340: true will cause those sequences not to display, so as not to confuse the
341: user into thinking that if the sequence is there there should be things
342: under it; for example, see the "Show Uncompleted Homework" view on the
343: B<NAV> screen.
344:
345: =item * B<suppressNavmaps>: default: false
346:
347: If true, will not display Navigate Content resources.
348:
349: =back
350:
351: =head2 Additional Info
352:
353: In addition to the parameters you can pass to the renderer, which will
354: be passed through unchange to the column renderers, the renderer will
355: generate the following information which your renderer may find
356: useful:
357:
358: =over 4
359:
360: =item * B<counter>:
361:
362: Contains the number of rows printed. Useful after calling the render
363: function, as you can detect whether anything was printed at all.
364:
365: =item * B<isNewBranch>:
366:
367: Useful for renderers: If this resource is currently the first resource
368: of a new branch, this will be true. The Resource column (leftmost in the
369: navmaps screen) uses this to display the "new branch" icon
370:
371: =back
372:
373: =cut
374:
375:
376: =head1 SUBROUTINES
377:
378: =over
379:
380: =item update()
381:
382: =item addToFilter()
383:
384: Convenience functions: Returns a string that adds or subtracts
385: the second argument from the first hash, appropriate for the
386: query string that determines which folders to recurse on
387:
388: =item removeFromFilter()
389:
390: =item getLinkForResource()
391:
392: Convenience function: Given a stack returned from getStack on the iterator,
393: return the correct src() value.
394:
395: =item getDescription()
396:
397: Convenience function: This separates the logic of how to create
398: the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
399: etc.) into a separate function. It takes a resource object as the
400: first parameter, and the part number of the resource as the second.
401: It's basically a big switch statement on the status of the resource.
402:
403: =item dueInLessThan24Hours()
404:
405: Convenience function, so others can use it: Is the problem due in less than 24 hours, and still can be done?
406:
407: =item lastTry()
408:
409: Convenience function, so others can use it: Is there only one try remaining for the
410: part, with more than one try to begin with, not due yet and still can be done?
411:
412: =item advancedUser()
413:
414: This puts a human-readable name on the env variable.
415:
416: =item timeToHumanString()
417:
418: timeToHumanString takes a time number and converts it to a
419: human-readable representation, meant to be used in the following
420: manner:
421:
422: =over 4
423:
424: =item * print "Due $timestring"
425:
426: =item * print "Open $timestring"
427:
428: =item * print "Answer available $timestring"
429:
430: =back
431:
432: Very, very, very, VERY English-only... goodness help a localizer on
433: this func...
434:
435: =item resource()
436:
437: returns 0
438:
439: =item communication_status()
440:
441: returns 1
442:
443: =item quick_status()
444:
445: returns 2
446:
447: =item long_status()
448:
449: returns 3
450:
451: =item part_status_summary()
452:
453: returns 4
454:
455: =item render_resource()
456:
457: =item render_communication_status()
458:
459: =item render_quick_status()
460:
461: =item render_long_status()
462:
463: =item render_parts_summary_status()
464:
465: =item setDefault()
466:
467: =item cmp_title()
468:
469: =item render()
470:
471: =item add_linkitem()
472:
473: =item show_linkitems_toolbar()
474:
475: =back
476:
477: =cut
478:
479: package Apache::lonnavmaps;
480:
481: use strict;
482: use GDBM_File;
483: use Apache::loncommon();
484: use Apache::lonenc();
485: use Apache::lonlocal;
486: use Apache::lonnet;
487: use Apache::lonmap;
488:
489: use POSIX qw (ceil floor strftime);
490: use Time::HiRes qw( gettimeofday tv_interval );
491: use LONCAPA;
492: use DateTime();
493: use HTML::Entities;
494:
495: # For debugging
496:
497: #use Data::Dumper;
498:
499:
500: # symbolic constants
501: sub SYMB { return 1; }
502: sub URL { return 2; }
503: sub NOTHING { return 3; }
504:
505: # Some data
506:
507: my $resObj = "Apache::lonnavmaps::resource";
508:
509: # Keep these mappings in sync with lonquickgrades, which usesthe colors
510: # instead of the icons.
511: my %statusIconMap =
512: (
513: $resObj->CLOSED => '',
514: $resObj->OPEN => 'navmap.open.gif',
515: $resObj->CORRECT => 'navmap.correct.gif',
516: $resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
517: $resObj->INCORRECT => 'navmap.wrong.gif',
518: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
519: $resObj->ERROR => ''
520: );
521:
522: my %iconAltTags = #texthash does not work here
523: ( 'navmap.correct.gif' => 'Correct',
524: 'navmap.wrong.gif' => 'Incorrect',
525: 'navmap.open.gif' => 'Is Open',
526: 'navmap.partial.gif' => 'Partially Correct',
527: 'navmap.ellipsis.gif' => 'Attempted',
528: );
529:
530: # Defines a status->color mapping, null string means don't color
531: my %colormap =
532: ( $resObj->NETWORK_FAILURE => '',
533: $resObj->CORRECT => '',
534: $resObj->EXCUSED => '#3333FF',
535: $resObj->PAST_DUE_ANSWER_LATER => '',
536: $resObj->PAST_DUE_NO_ANSWER => '',
537: $resObj->ANSWER_OPEN => '#006600',
538: $resObj->OPEN_LATER => '',
539: $resObj->TRIES_LEFT => '',
540: $resObj->INCORRECT => '',
541: $resObj->OPEN => '',
542: $resObj->NOTHING_SET => '',
543: $resObj->ATTEMPTED => '',
544: $resObj->CREDIT_ATTEMPTED => '',
545: $resObj->ANSWER_SUBMITTED => '',
546: $resObj->PARTIALLY_CORRECT => '#006600'
547: );
548: # And a special case in the nav map; what to do when the assignment
549: # is not yet done and due in less than 24 hours
550: my $hurryUpColor = "#FF0000";
551:
552: sub addToFilter {
553: my $hashIn = shift;
554: my $addition = shift;
555: my %hash = %$hashIn;
556: $hash{$addition} = 1;
557:
558: return join (",", keys(%hash));
559: }
560:
561: sub removeFromFilter {
562: my $hashIn = shift;
563: my $subtraction = shift;
564: my %hash = %$hashIn;
565:
566: delete $hash{$subtraction};
567: return join(",", keys(%hash));
568: }
569:
570: sub getLinkForResource {
571: my $stack = shift;
572: my $res;
573:
574: # Check to see if there are any pages in the stack
575: foreach $res (@$stack) {
576: if (defined($res)) {
577: my $anchor;
578: if ($res->is_page()) {
579: foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
580: if ($anchor->encrypted() && !&advancedUser()) {
581: $anchor='LC_'.$anchor->id();
582: } else {
583: $anchor=&escape($anchor->shown_symb());
584: }
585: return ($res->link(),$res->shown_symb(),$anchor);
586: }
587: # in case folder was skipped over as "only sequence"
588: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
589: if ($map=~/\.page$/) {
590: my $url=&Apache::lonnet::clutter($map);
591: $anchor=&escape($res->shown_symb());
592: return ($url,$res->shown_symb(),$anchor);
593: }
594: }
595: }
596:
597: # Failing that, return the src of the last resource that is defined
598: # (when we first recurse on a map, it puts an undefined resource
599: # on the bottom because $self->{HERE} isn't defined yet, and we
600: # want the src for the map anyhow)
601: foreach my $item (@$stack) {
602: if (defined($item)) { $res = $item; }
603: }
604:
605: if ($res) {
606: return ($res->link(),$res->shown_symb());
607: }
608: return;
609: }
610:
611:
612:
613: sub getDescription {
614: my $res = shift;
615: my $part = shift;
616: my $status = $res->status($part);
617:
618: my $open = $res->opendate($part);
619: my $due = $res->duedate($part);
620: my $answer = $res->answerdate($part);
621:
622: if ($status == $res->NETWORK_FAILURE) {
623: return &mt("Having technical difficulties; please check status later");
624: }
625: if ($status == $res->NOTHING_SET) {
626: return &Apache::lonhtmlcommon::direct_parm_link(&mt('Not currently assigned'),$res->symb(),'opendate',$part);
627: }
628: if ($status == $res->OPEN_LATER) {
629: return &mt("Open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($open,'start'),$res->symb(),'opendate',$part));
630: }
631: my $slotinfo;
632: if ($res->simpleStatus($part) == $res->OPEN) {
633: unless (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
634: my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);
635: my $slotmsg;
636: if ($slot_status == $res->UNKNOWN) {
637: $slotmsg = &mt('Reservation status unknown');
638: } elsif ($slot_status == $res->RESERVED) {
639: $slotmsg = &mt('Reserved - ends [_1]',
640: timeToHumanString($slot_time,'end'));
641: } elsif ($slot_status == $res->RESERVED_LOCATION) {
642: $slotmsg = &mt('Reserved - specific location(s) - ends [_1]',
643: timeToHumanString($slot_time,'end'));
644: } elsif ($slot_status == $res->RESERVED_LATER) {
645: $slotmsg = &mt('Reserved - next open [_1]',
646: timeToHumanString($slot_time,'start'));
647: } elsif ($slot_status == $res->RESERVABLE) {
648: $slotmsg = &mt('Reservable, reservations close [_1]',
649: timeToHumanString($slot_time,'end'));
650: } elsif ($slot_status == $res->NEEDS_CHECKIN) {
651: $slotmsg = &mt('Reserved, check-in needed - ends [_1]',
652: timeToHumanString($slot_time,'end'));
653: } elsif ($slot_status == $res->RESERVABLE_LATER) {
654: $slotmsg = &mt('Reservable, reservations open [_1]',
655: timeToHumanString($slot_time,'start'));
656: } elsif ($slot_status == $res->NOT_IN_A_SLOT) {
657: $slotmsg = &mt('Reserve a time/place to work');
658: } elsif ($slot_status == $res->NOTRESERVABLE) {
659: $slotmsg = &mt('Reservation not available');
660: } elsif ($slot_status == $res->WAITING_FOR_GRADE) {
661: $slotmsg = &mt('Submission in grading queue');
662: }
663: if ($slotmsg) {
664: if ($res->is_task() || !$due) {
665: return $slotmsg;
666: }
667: $slotinfo = (' ' x 2).'('.$slotmsg.')';
668: }
669: }
670: }
671: if ($status == $res->OPEN) {
672: if ($due) {
673: if ($res->is_practice()) {
674: return &mt("Closes [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'duedate',$part)).$slotinfo;
675: } else {
676: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)).$slotinfo;
677: }
678: } else {
679: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Open, no due date"),$res->symb(),'duedate',$part).$slotinfo;
680: }
681: }
682: if ($status == $res->PAST_DUE_ANSWER_LATER) {
683: return &mt("Answer open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($answer,'start'),$res->symb(),'answerdate',$part));
684: }
685: if ($status == $res->PAST_DUE_NO_ANSWER) {
686: if ($res->is_practice()) {
687: return &mt("Closed [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'answerdate,duedate',$part));
688: } else {
689: return &mt("Was due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'answerdate,duedate',$part));
690: }
691: }
692: if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
693: && $res->handgrade($part) ne 'yes') {
694: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Answer available"),$res->symb(),'answerdate,duedate',$part);
695: }
696: if ($status == $res->EXCUSED) {
697: return &mt("Excused by instructor");
698: }
699: if ($status == $res->ATTEMPTED) {
700: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
701: return &mt("Survey submission recorded");
702: } else {
703: return &mt("Answer submitted, not yet graded");
704: }
705: }
706: if ($status == $res->CREDIT_ATTEMPTED) {
707: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
708: return &mt("Credit for survey submission");
709: }
710: }
711: if ($status == $res->TRIES_LEFT) {
712: my $tries = $res->tries($part);
713: my $maxtries = $res->maxtries($part);
714: my $triesString = "";
715: if ($tries && $maxtries) {
716: $triesString = '<span class="LC_fontsize_medium"><i>('.&mt('[_1] of [quant,_2,try,tries] used',$tries,$maxtries).')</i></span>';
717: if ($maxtries > 1 && $maxtries - $tries == 1) {
718: $triesString = "<b>$triesString</b>";
719: }
720: }
721: if ($due) {
722: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)) .
723: " $triesString";
724: } else {
725: return &Apache::lonhtmlcommon::direct_parm_link(&mt("No due date"),$res->symb(),'duedate',$part)." $triesString";
726: }
727: }
728: if ($status == $res->ANSWER_SUBMITTED) {
729: return &mt('Answer submitted');
730: }
731: }
732:
733:
734: sub dueInLessThan24Hours {
735: my $res = shift;
736: my $part = shift;
737: my $status = $res->status($part);
738:
739: return ($status == $res->OPEN() ||
740: $status == $res->TRIES_LEFT()) &&
741: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
742: $res->duedate($part) > time();
743: }
744:
745:
746: sub lastTry {
747: my $res = shift;
748: my $part = shift;
749:
750: my $tries = $res->tries($part);
751: my $maxtries = $res->maxtries($part);
752: return $tries && $maxtries && $maxtries > 1 &&
753: $maxtries - $tries == 1 && $res->duedate($part) &&
754: $res->duedate($part) > time();
755: }
756:
757:
758: sub advancedUser {
759: return $env{'request.role.adv'};
760: }
761:
762: sub timeToHumanString {
763: my ($time,$type,$format) = @_;
764:
765: # zero, '0' and blank are bad times
766: if (!$time) {
767: return &mt('never');
768: }
769: unless (&Apache::lonlocal::current_language()=~/^en/) {
770: return &Apache::lonlocal::locallocaltime($time);
771: }
772: my $now = time();
773:
774: # Positive = future
775: my $delta = $time - $now;
776:
777: my $minute = 60;
778: my $hour = 60 * $minute;
779: my $day = 24 * $hour;
780: my $week = 7 * $day;
781: my $inPast = 0;
782:
783: # Logic in comments:
784: # Is it now? (extremely unlikely)
785: if ( $delta == 0 ) {
786: return "this instant";
787: }
788:
789: if ($delta < 0) {
790: $inPast = 1;
791: $delta = -$delta;
792: }
793:
794: if ( $delta > 0 ) {
795:
796: my $tense = $inPast ? " ago" : "";
797: my $prefix = $inPast ? "" : "in ";
798:
799: # Less than a minute
800: if ( $delta < $minute ) {
801: if ($delta == 1) { return "${prefix}1 second$tense"; }
802: return "$prefix$delta seconds$tense";
803: }
804:
805: # Less than an hour
806: if ( $delta < $hour ) {
807: # If so, use minutes; or minutes, seconds (if format requires)
808: my $minutes = floor($delta / 60);
809: if (($format ne '') && ($format =~ /\%(T|S)/)) {
810: my $display;
811: if ($minutes == 1) {
812: $display = "${prefix}1 minute";
813: } else {
814: $display = "$prefix$minutes minutes";
815: }
816: my $seconds = $delta % $minute;
817: if ($seconds == 0) {
818: $display .= $tense;
819: } elsif ($seconds == 1) {
820: $display .= ", 1 second$tense";
821: } else {
822: $display .= ", $seconds seconds$tense";
823: }
824: return $display;
825: }
826: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
827: return "$prefix$minutes minutes$tense";
828: }
829:
830: # Is it less than 24 hours away? If so,
831: # display hours + minutes, (and + seconds, if format specified it)
832: if ( $delta < $hour * 24) {
833: my $hours = floor($delta / $hour);
834: my $minutes = floor(($delta % $hour) / $minute);
835: my $hourString = "$hours hours";
836: my $minuteString = ", $minutes minutes";
837: if ($hours == 1) {
838: $hourString = "1 hour";
839: }
840: if ($minutes == 1) {
841: $minuteString = ", 1 minute";
842: }
843: if ($minutes == 0) {
844: $minuteString = "";
845: }
846: if (($format ne '') && ($format =~ /\%(T|S)/)) {
847: my $display = "$prefix$hourString$minuteString";
848: my $seconds = $delta-(($hours * $hour)+($minutes * $minute));
849: if ($seconds == 0) {
850: $display .= $tense;
851: } elsif ($seconds == 1) {
852: $display .= ", 1 second$tense";
853: } else {
854: $display .= ", $seconds seconds$tense";
855: }
856: return $display;
857: }
858: return "$prefix$hourString$minuteString$tense";
859: }
860:
861: # Date/time is more than 24 hours away
862:
863: my $dt = DateTime->from_epoch(epoch => $time)
864: ->set_time_zone(&Apache::lonlocal::gettimezone());
865:
866: # If there's a caller supplied format, use it, unless it only displays
867: # H:M:S or H:M.
868:
869: if (($format ne '') && ($format ne '%T') && ($format ne '%R')) {
870: my $timeStr = $dt->strftime($format);
871: return $timeStr.' ('.$dt->time_zone_short_name().')';
872: }
873:
874: # Less than 5 days away, display day of the week and
875: # HH:MM
876:
877: if ( $delta < $day * 5 ) {
878: my $timeStr = $dt->strftime("%A, %b %e at %I:%M %P (%Z)");
879: $timeStr =~ s/12:00 am/00:00/;
880: $timeStr =~ s/12:00 pm/noon/;
881: return ($inPast ? "last " : "this ") .
882: $timeStr;
883: }
884:
885: my $conjunction='on';
886: if ($type eq 'start') {
887: $conjunction='at';
888: } elsif ($type eq 'end') {
889: $conjunction='by';
890: }
891: # Is it this year?
892: my $dt_now = DateTime->from_epoch(epoch => $now)
893: ->set_time_zone(&Apache::lonlocal::gettimezone());
894: if ( $dt->year() == $dt_now->year()) {
895: # Return on Month Day, HH:MM meridian
896: my $timeStr = $dt->strftime("$conjunction %A, %b %e at %I:%M %P (%Z)");
897: $timeStr =~ s/12:00 am/00:00/;
898: $timeStr =~ s/12:00 pm/noon/;
899: return $timeStr;
900: }
901:
902: # Not this year, so show the year
903: my $timeStr =
904: $dt->strftime("$conjunction %A, %b %e %Y at %I:%M %P (%Z)");
905: $timeStr =~ s/12:00 am/00:00/;
906: $timeStr =~ s/12:00 pm/noon/;
907: return $timeStr;
908: }
909: }
910:
911:
912: sub resource { return 0; }
913: sub communication_status { return 1; }
914: sub quick_status { return 2; }
915: sub long_status { return 3; }
916: sub part_status_summary { return 4; }
917:
918: sub render_resource {
919: my ($resource, $part, $params) = @_;
920:
921: my $editmapLink;
922: my $nonLinkedText = ''; # stuff after resource title not in link
923:
924: my $link = $params->{"resourceLink"};
925: if ($resource->ext()) {
926: $link =~ s/\#.+(\?)/$1/g;
927: }
928:
929: # The URL part is not escaped at this point, but the symb is...
930:
931: my $src = $resource->src();
932: my $it = $params->{"iterator"};
933: my $filter = $it->{FILTER};
934:
935: my $title = $resource->compTitle();
936:
937: my $partLabel = "";
938: my $newBranchText = "";
939: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
940: # If this is a new branch, label it so
941: if ($params->{'isNewBranch'}) {
942: $newBranchText = "<img src='$location/branch.gif' alt=".mt('Branch')." />";
943: }
944:
945: # links to open and close the folder
946:
947: my $whitespace = $location.'/whitespace_21.gif';
948: my ($nomodal,$linkopen,$linkclose);
949: unless ($resource->is_map() || $params->{'resource_nolink'}) {
950: $linkopen = "<img src='$whitespace' alt='' />";
951: $linkclose = "</a>";
952: if (($params->{'modalLink'}) && (!$resource->is_sequence())) {
953: if ($link =~m{^(?:|/adm/wrapper)/ext/([^#]+)}) {
954: my $exturl = $1;
955: if (($ENV{'SERVER_PORT'} == 443) && ($exturl !~ /^https:/)) {
956: $nomodal = 1;
957: }
958: } elsif (($link eq "/public/$LONCAPA::match_domain/$LONCAPA::match_courseid/syllabus") &&
959: ($env{'request.course.id'}) && ($ENV{'SERVER_PORT'} == 443) &&
960: ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
961: $nomodal = 1;
962: }
963: my $esclink = &js_escape($link);
964: if ($nomodal) {
965: $linkopen .= "<a href=\"#\" onclick=\"javascript:window.open('$esclink','resourcepreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1'); return false;\" />";
966: } else {
967: $linkopen .= "<a href=\"$link\" onclick=\"javascript:openMyModal('$esclink',600,500,'yes','true'); return false;\">";
968: }
969: } else {
970: $linkopen .= "<a href=\"$link\">";
971: }
972: }
973:
974: # Default icon: unknown page
975: my $icon = "<img class=\"LC_contentImage\" src='$location/unknown.gif' alt='' />";
976:
977: if ($resource->is_problem()) {
978: if ($part eq '0' || $params->{'condensed'}) {
979: $icon = '<img class="LC_contentImage" src="'.$location.'/';
980: if ($resource->is_task()) {
981: $icon .= 'task.gif" alt="'.&mt('Task');
982: } else {
983: $icon .= 'problem.gif" alt="'.&mt('Problem');
984: }
985: $icon .='" />';
986: } else {
987: $icon = $params->{'indentString'};
988: }
989: } else {
990: $icon = "<img class=\"LC_contentImage\" src='".&Apache::loncommon::icon($resource->src)."' alt='' />";
991: }
992:
993: # Display the correct map icon to open or shut map
994: if ($resource->is_map()) {
995: my $mapId = $resource->map_pc();
996: my $nowOpen = !defined($filter->{$mapId});
997: if ($it->{CONDITION}) {
998: $nowOpen = !$nowOpen;
999: }
1000:
1001: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1002: my $title=$resource->title;
1003: $title=~s/\"/\&qout;/g;
1004: if (!$params->{'resource_no_folder_link'}) {
1005: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1006: $icon = "<img src='$location/arrow." . ($nowOpen ? 'closed' : 'open') . ".gif' alt='' />"
1007: ."<img class=\"LC_contentImage\" src='$location/$icon' alt=\""
1008: .($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1009: $linkopen = "<a href=\"" . $params->{'url'} . '?' .
1010: $params->{'queryString'} . '&filter=';
1011: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
1012: addToFilter($filter, $mapId) :
1013: removeFromFilter($filter, $mapId);
1014: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
1015: . $params->{'hereType'} . '&here=' .
1016: &escape($params->{'here'}) .
1017: '&jump=' .
1018: &escape($resource->symb()) .
1019: "&folderManip=1\">";
1020: $linkclose = '</a>';
1021: } else {
1022: # Don't allow users to manipulate folder
1023: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1024: $icon = "<img class=\"LC_space\" src='$whitespace' alt='' />"."<img class=\"LC_contentImage\" src='$location/$icon' alt=\"".($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1025: if ($params->{'caller'} eq 'sequence') {
1026: $linkopen = "<a href=\"$link\">";
1027: $linkclose = '</a>';
1028: } else {
1029: $linkopen = "";
1030: $linkclose = "";
1031: }
1032: }
1033: if (((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
1034: (&Apache::lonnet::allowed('cev',$env{'request.course.id'}))) &&
1035: ($resource->symb=~/\_\_\_[^\_]+\_\_\_uploaded/)) {
1036: if (!$params->{'map_no_edit_link'}) {
1037: my $icon = &Apache::loncommon::lonhttpdurl('/res/adm/pages').'/editmap.png';
1038: $editmapLink=' '.
1039: '<a href="/adm/coursedocs?command=directnav&symb='.&escape($resource->symb()).'">'.
1040: '<img src="'.$icon.'" alt="'.&mt('Edit Content').'" title="'.&mt('Edit Content').'" />'.
1041: '</a>';
1042: }
1043: }
1044: if ($params->{'mapHidden'} || $resource->randomout()) {
1045: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1046: } elsif ($params->{'mapUnlisted'}) {
1047: $nonLinkedText .= ' <span class="LC_warning">('.&mt('unlisted').')</span> ';
1048: } elsif ($params->{'mapHiddenDeepLink'} || $resource->deeplinkout()) {
1049: $nonLinkedText .= ' <span class="LC_warning">('.&mt('not shown').')</span> ';
1050: }
1051: } else {
1052: if ($resource->randomout()) {
1053: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1054: } elsif ($resource->deeplinkout()) {
1055: $nonLinkedText .= ' <span class="LC_warning">('.&mt('not shown').')</span> ';
1056: } else {
1057: my $deeplink = $resource->deeplink($params->{caller});
1058: if ((($deeplink eq 'absent') || ($deeplink eq 'grades')) &&
1059: &advancedUser()) {
1060: $nonLinkedText .= ' <span class="LC_warning">('.&mt('unlisted').')</span> ';
1061: } elsif (($deeplink) && ($deeplink) ne 'full') {
1062: if (&advancedUser()) {
1063: $nonLinkedText .= ' <span class="LC_warning">('.&mt('deep-link access').
1064: ')</span> ';
1065: } else {
1066: $nonLinkedText .= ' <span class="LC_warning">('.&mt('access via external site').
1067: ')</span> ';
1068: }
1069: }
1070: }
1071: }
1072: if (!$resource->condval()) {
1073: $nonLinkedText .= ' <span class="LC_info">('.&mt('conditionally hidden').')</span> ';
1074: }
1075: if (($resource->is_practice()) && ($resource->is_raw_problem())) {
1076: $nonLinkedText .=' <span class="LC_info"><b>'.&mt('not graded').'</b></span>';
1077: }
1078:
1079: # We're done preparing and finally ready to start the rendering
1080: my $result = '<td class="LC_middle">';
1081: my $newfolderType = $resource->is_sequence() ? 'folder' : 'page';
1082:
1083: my $indentLevel = $params->{'indentLevel'};
1084: if ($newBranchText) { $indentLevel--; }
1085:
1086: # print indentation
1087: for (my $i = 0; $i < $indentLevel; $i++) {
1088: $result .= $params->{'indentString'};
1089: }
1090:
1091: # Decide what to display
1092: $result .= "$newBranchText$linkopen$icon$linkclose";
1093:
1094: my $curMarkerBegin = '';
1095: my $curMarkerEnd = '';
1096:
1097: # Is this the current resource?
1098: if (!$params->{'displayedHereMarker'} &&
1099: $resource->symb() eq $params->{'here'} ) {
1100: unless ($resource->is_map()) {
1101: $curMarkerBegin = '<span class="LC_current_nav_location">';
1102: $curMarkerEnd = '</span>';
1103: }
1104: $params->{'displayedHereMarker'} = 1;
1105: }
1106:
1107: if ($resource->is_problem() && $part ne '0' &&
1108: !$params->{'condensed'}) {
1109: my $displaypart=$resource->part_display($part);
1110: $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
1111: if ($link!~/\#/) { $link.='#'.&escape($part); }
1112: $title = "";
1113: }
1114:
1115: if ($params->{'condensed'} && $resource->countParts() > 1) {
1116: $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
1117: }
1118:
1119: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1120: $linkclose = '</a>';
1121: if ($params->{'modalLink'}) {
1122: my $esclink = &js_escape($link);
1123: if ($nomodal) {
1124: $linkopen = "<a href=\"#\" onclick=\"javascript:window.open('$esclink','resourcepreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1'); return false;\" />";
1125: } else {
1126: $linkopen = "<a href=\"$link\" onclick=\"javascript:openMyModal('$esclink',600,500,'yes','true'); return false;\">";
1127: }
1128: } else {
1129: $linkopen = "<a href=\"$link\">";
1130: }
1131: }
1132: $result .= "$curMarkerBegin$linkopen$title$partLabel$linkclose$curMarkerEnd$editmapLink$nonLinkedText</td>";
1133:
1134: return $result;
1135: }
1136:
1137: sub render_communication_status {
1138: my ($resource, $part, $params) = @_;
1139: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1140:
1141: my $link = $params->{"resourceLink"};
1142: my $linkopen = "<a href=\"$link\">";
1143: my $linkclose = "</a>";
1144: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1145:
1146: if ($resource->hasDiscussion()) {
1147: $discussionHTML = $linkopen .
1148: '<img alt="'.&mt('New Discussion').'" src="'.$location.'/chat.gif" title="'.&mt('New Discussion').'"/>' .
1149: $linkclose;
1150: }
1151:
1152: if ($resource->getFeedback()) {
1153: my $feedback = $resource->getFeedback();
1154: foreach my $msgid (split(/\,/, $feedback)) {
1155: if ($msgid) {
1156: $feedbackHTML .= ' <a href="/adm/email?display='
1157: . &escape($msgid) . '">'
1158: . '<img alt="'.&mt('New E-mail').'" src="'.$location.'/feedback.gif" title="'.&mt('New E-mail').'"/></a>';
1159: }
1160: }
1161: }
1162:
1163: if ($resource->getErrors()) {
1164: my $errors = $resource->getErrors();
1165: my $errorcount = 0;
1166: foreach my $msgid (split(/,/, $errors)) {
1167: last if ($errorcount>=10); # Only output 10 bombs maximum
1168: if ($msgid) {
1169: $errorcount++;
1170: $errorHTML .= ' <a href="/adm/email?display='
1171: . &escape($msgid) . '">'
1172: . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" title="'.&mt('New Error').'"/></a>';
1173: }
1174: }
1175: }
1176:
1177: if ($params->{'multipart'} && $part != '0') {
1178: $discussionHTML = $feedbackHTML = $errorHTML = '';
1179: }
1180: return "<td class=\"LC_middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
1181:
1182: }
1183: sub render_quick_status {
1184: my ($resource, $part, $params) = @_;
1185: my $result = "";
1186: my $firstDisplayed = !$params->{'condensed'} &&
1187: $params->{'multipart'} && $part eq "0";
1188:
1189: my $link = $params->{"resourceLink"};
1190: my $linkopen = "<a href=\"$link\">";
1191: my $linkclose = "</a>";
1192:
1193: $result .= '<td class="LC_middle">';
1194: if ($resource->is_problem() &&
1195: !$firstDisplayed) {
1196: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1197: my $alt = $iconAltTags{$icon};
1198: if ($icon) {
1199: my $location=
1200: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1201: $result .= $linkopen.'<img src="'.$location.'" alt="'.&mt($alt).'" title="'.&mt($alt).'" />'.$linkclose;
1202: } else {
1203: $result .= " ";
1204: }
1205: } else { # not problem, no icon
1206: $result .= " ";
1207: }
1208: $result .= "</td>\n";
1209: return $result;
1210: }
1211: sub render_long_status {
1212: my ($resource, $part, $params) = @_;
1213: my $result = '<td class="LC_middle LC_right">';
1214: my $firstDisplayed = !$params->{'condensed'} &&
1215: $params->{'multipart'} && $part eq "0";
1216:
1217: my $color;
1218: my $info = '';
1219: if ($resource->is_problem() || $resource->is_practice()) {
1220: $color = $colormap{$resource->status};
1221:
1222: if (dueInLessThan24Hours($resource, $part)) {
1223: $color = $hurryUpColor;
1224: $info = ' title="'.&mt('Due in less than 24 hours!').'"';
1225: } elsif (lastTry($resource, $part)) {
1226: unless (($resource->problemstatus($part) eq 'no') ||
1227: ($resource->problemstatus($part) eq 'no_feedback_ever')) {
1228: $color = $hurryUpColor;
1229: $info = ' title="'.&mt('One try remaining!').'"';
1230: }
1231: }
1232: }
1233:
1234: if ($resource->kind() eq "res" &&
1235: $resource->is_raw_problem() &&
1236: !$firstDisplayed) {
1237: if ($color) {$result .= '<span style="color:'.$color.'"'.$info.'><b>'; }
1238: $result .= getDescription($resource, $part);
1239: if ($color) {$result .= "</b></span>"; }
1240: }
1241: if ($resource->is_map() && &advancedUser() && $resource->randompick()) {
1242: $result .= &mt('(randomly select [_1])', $resource->randompick());
1243: }
1244: if ($resource->is_map() && &advancedUser() && $resource->randomorder()) {
1245: $result .= &mt('(randomly ordered)');
1246: }
1247:
1248: # Debugging code
1249: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1250: # ' - Part: ' . $part;
1251:
1252: $result .= "</td>\n";
1253:
1254: return $result;
1255: }
1256:
1257: # Colors obtained by taking the icons, matching the colors, and
1258: # possibly reducing the Value (HSV) of the color, if it's too bright
1259: # for text, generally by one third or so.
1260: my %statusColors =
1261: (
1262: $resObj->CLOSED => '#000000',
1263: $resObj->OPEN => '#998b13',
1264: $resObj->CORRECT => '#26933f',
1265: $resObj->INCORRECT => '#c48207',
1266: $resObj->ATTEMPTED => '#a87510',
1267: $resObj->ERROR => '#000000'
1268: );
1269: my %statusStrings =
1270: (
1271: $resObj->CLOSED => 'Not yet open',
1272: $resObj->OPEN => 'Open',
1273: $resObj->CORRECT => 'Correct',
1274: $resObj->INCORRECT => 'Incorrect',
1275: $resObj->ATTEMPTED => 'Attempted',
1276: $resObj->ERROR => 'Network Error'
1277: );
1278: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1279:
1280: sub render_parts_summary_status {
1281: my ($resource, $part, $params) = @_;
1282: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1283: if ($params->{showParts}) {
1284: return '<td></td>';
1285: }
1286:
1287: my $td = "<td align='right'>\n";
1288: my $endtd = "</td>\n";
1289: my @probs;
1290:
1291: if ($resource->contains_problem) {
1292: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1293: } else {
1294: @probs=($resource);
1295: }
1296: my $return;
1297: my %overallstatus;
1298: my $totalParts;
1299: foreach my $resource (@probs) {
1300: # If there is a single part, just show the simple status
1301: if ($resource->singlepart()) {
1302: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1303: $overallstatus{$status}++;
1304: $totalParts++;
1305: next;
1306: }
1307: # Now we can be sure the $part doesn't really matter.
1308: my $statusCount = $resource->simpleStatusCount();
1309: my @counts;
1310: foreach my $status (@statuses) {
1311: # decouple display order from the simpleStatusCount order
1312: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1313: if ($statusCount->[$slot]) {
1314: $overallstatus{$status}+=$statusCount->[$slot];
1315: $totalParts+=$statusCount->[$slot];
1316: }
1317: }
1318: }
1319: $return.= $td . $totalParts . ' parts: ';
1320: foreach my $status (@statuses) {
1321: if ($overallstatus{$status}) {
1322: $return.='<span style="color:' . $statusColors{$status}
1323: . '">' . $overallstatus{$status} . ' '
1324: . $statusStrings{$status} . '</span>';
1325: }
1326: }
1327: $return.= $endtd;
1328: return $return;
1329: }
1330:
1331: my @preparedColumns = (\&render_resource, \&render_communication_status,
1332: \&render_quick_status, \&render_long_status,
1333: \&render_parts_summary_status);
1334:
1335: sub setDefault {
1336: my ($val, $default) = @_;
1337: if (!defined($val)) { return $default; }
1338: return $val;
1339: }
1340:
1341: sub cmp_title {
1342: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1343: $atitle=~s/^\s*//;
1344: $btitle=~s/^\s*//;
1345: return $atitle cmp $btitle;
1346: }
1347:
1348: sub render {
1349: my $args = shift;
1350: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1351: my $result = '';
1352: # Configure the renderer.
1353: my $cols = $args->{'cols'};
1354: if (!defined($cols)) {
1355: # no columns, no nav maps.
1356: return '';
1357: }
1358: my $navmap;
1359: if (defined($args->{'navmap'})) {
1360: $navmap = $args->{'navmap'};
1361: }
1362:
1363: my $r = $args->{'r'};
1364: my $queryString = $args->{'queryString'};
1365: my $jump = $args->{'jump'};
1366: my $here = $args->{'here'};
1367: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1368: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1369: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1370: # before the current resource when using #current
1371:
1372: # If we were passed 'here' information, we are not rendering
1373: # after a folder manipulation, and we were not passed an
1374: # iterator, make sure we open the folders to show the "here"
1375: # marker
1376: my $filterHash = {};
1377: # Figure out what we're not displaying
1378: foreach my $item (split(/\,/, $env{"form.filter"})) {
1379: if ($item) {
1380: $filterHash->{$item} = "1";
1381: }
1382: }
1383:
1384: # Filter: Remember filter function and add our own filter: Refuse
1385: # to show hidden resources unless the user can see them.
1386: my $userCanSeeHidden = advancedUser();
1387: my $filterFunc = setDefault($args->{'filterFunc'},
1388: sub {return 1;});
1389: if (!$userCanSeeHidden) {
1390: # Without renaming the filterfunc, the server seems to go into
1391: # an infinite loop
1392: my $oldFilterFunc = $filterFunc;
1393: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1394: ($res->deeplink($args->{'caller'}) ne 'absent') &&
1395: ($res->deeplink($args->{'caller'}) ne 'grades') &&
1396: !$res->deeplinkout() &&
1397: &$oldFilterFunc($res);};
1398: }
1399:
1400: my $condition = 0;
1401: if ($env{'form.condition'}) {
1402: $condition = 1;
1403: }
1404:
1405: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1406: # Step 1: Check to see if we have a navmap
1407: if (!defined($navmap)) {
1408: $navmap = Apache::lonnavmaps::navmap->new();
1409: if (!defined($navmap)) {
1410: # no longer in course
1411: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1412: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1413: }
1414: }
1415:
1416: # Step two: Locate what kind of here marker is necessary
1417: # Determine where the "here" marker is and where the screen jumps to.
1418:
1419: if ($env{'form.postsymb'} ne '') {
1420: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1421: } elsif ($env{'form.postdata'} ne '') {
1422: # couldn't find a symb, is there a URL?
1423: my $currenturl = $env{'form.postdata'};
1424: #$currenturl=~s/^http\:\/\///;
1425: #$currenturl=~s/^[^\/]+//;
1426: unless ($args->{'caller'} eq 'sequence') {
1427: $here = $jump = &Apache::lonnet::symbread($currenturl);
1428: }
1429: }
1430: if (($here eq '') && ($args->{'caller'} ne 'sequence')) {
1431: my $last;
1432: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1433: &GDBM_READER(),0640)) {
1434: $last=$hash{'last_known'};
1435: untie(%hash);
1436: }
1437: if ($last) { $here = $jump = $last; }
1438: }
1439:
1440: # Step three: Ensure the folders are open
1441: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1442: my $curRes;
1443: my $found = 0;
1444:
1445: # We only need to do this if we need to open the maps to show the
1446: # current position. This will change the counter so we can't count
1447: # for the jump marker with this loop.
1448: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1449: if (ref($curRes) && $curRes->symb() eq $here) {
1450: my $mapStack = $mapIterator->getStack();
1451:
1452: # Ensure the parent maps are open
1453: for my $map (@{$mapStack}) {
1454: if ($condition) {
1455: undef $filterHash->{$map->map_pc()};
1456: } else {
1457: $filterHash->{$map->map_pc()} = 1;
1458: }
1459: }
1460: $found = 1;
1461: }
1462: }
1463: }
1464:
1465: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1466: # If this is a click on a folder or something, we want to preserve the "here"
1467: # from the querystring, and get the new "jump" marker
1468: $here = $env{'form.here'};
1469: $jump = $env{'form.jump'};
1470: }
1471:
1472: my $it = $args->{'iterator'};
1473: if (!defined($it)) {
1474: # Construct a default iterator based on $env{'form.'} information
1475:
1476: # Step 1: Check to see if we have a navmap
1477: if (!defined($navmap)) {
1478: $navmap = Apache::lonnavmaps::navmap->new();
1479: if (!defined($navmap)) {
1480: # no longer in course
1481: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1482: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1483: }
1484: }
1485:
1486: # See if we're being passed a specific map
1487: if ($args->{'iterator_map'}) {
1488: my $map = $args->{'iterator_map'};
1489: $map = $navmap->getResourceByUrl($map);
1490: if (ref($map)) {
1491: my $firstResource = $map->map_start();
1492: my $finishResource = $map->map_finish();
1493: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1494: } else {
1495: return;
1496: }
1497: } else {
1498: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
1499: }
1500: }
1501:
1502: # (re-)Locate the jump point, if any
1503: # Note this does not take filtering or hidden into account... need
1504: # to be fixed?
1505: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1506: my $curRes;
1507: my $foundJump = 0;
1508: my $counter = 0;
1509:
1510: while (($curRes = $mapIterator->next()) && !$foundJump) {
1511: if (ref($curRes)) { $counter++; }
1512:
1513: if (ref($curRes) && $jump eq $curRes->symb()) {
1514:
1515: # This is why we have to use the main iterator instead of the
1516: # potentially faster DFS: The count has to be the same, so
1517: # the order has to be the same, which DFS won't give us.
1518: $args->{'currentJumpIndex'} = $counter;
1519: $foundJump = 1;
1520: }
1521: }
1522:
1523: my $showParts = setDefault($args->{'showParts'}, 1);
1524: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1525: # keeps track of when the current resource is found,
1526: # so we can back up a few and put the anchor above the
1527: # current resource
1528: my $printKey = $args->{'printKey'};
1529: my $printCloseAll = $args->{'printCloseAll'};
1530: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1531:
1532: # Print key?
1533: if ($printKey) {
1534: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1535: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1536: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1537: if ($navmap->{LAST_CHECK}) {
1538: $result .=
1539: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('New discussion since').' '.
1540: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1541: '</td><td align="center" valign="bottom"> '.
1542: '<img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').'<p>'.
1543: '</td>';
1544: } else {
1545: $result .= '<td align="center" valign="bottom"> '.
1546: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1547: ' <img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').
1548: '</td>';
1549: }
1550:
1551: $result .= '</tr></table>';
1552: }
1553:
1554: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1555: my ($link,$text);
1556: if ($condition) {
1557: $link='navmaps?condition=0&filter=&'.$queryString.
1558: '&here='.&escape($here);
1559: $text='Close all folders';
1560: } else {
1561: $link='navmaps?condition=1&filter=&'.$queryString.
1562: '&here='.&escape($here);
1563: $text='Open all folders';
1564: }
1565: if ($env{'form.register'}) {
1566: $link .= '&register='.$env{'form.register'};
1567: }
1568: if ($args->{'caller'} eq 'navmapsdisplay') {
1569: unless ($args->{'notools'}) {
1570: &add_linkitem($args->{'linkitems'},'changefolder',
1571: "location.href='$link'",$text);
1572: }
1573: } else {
1574: $result.= '<a href="'.$link.'">'.&mt($text).'</a>';
1575: }
1576: $result .= "\n";
1577: }
1578:
1579: # Check for any unread discussions in all resources.
1580: if (($args->{'caller'} eq 'navmapsdisplay') && (!$args->{'notools'})) {
1581: &add_linkitem($args->{'linkitems'},'clearbubbles',
1582: 'document.clearbubbles.submit()',
1583: 'Mark all posts read');
1584: my $time=time;
1585: my $querystr = &HTML::Entities::encode($ENV{'QUERY_STRING'},'<>&"');
1586: $result .= (<<END);
1587: <form name="clearbubbles" method="post" action="/adm/feedback">
1588: <input type="hidden" name="navurl" value="$querystr" />
1589: <input type="hidden" name="navtime" value="$time" />
1590: END
1591: if ($env{'form.register'}) {
1592: $result .= '<input type="hidden" name="register" value="'.$env{'form.register'}.'" />';
1593: }
1594: if ($args->{'sort'} eq 'discussion') {
1595: my $totdisc = 0;
1596: my $haveDisc = '';
1597: my @allres=$navmap->retrieveResources();
1598: foreach my $resource (@allres) {
1599: if ($resource->hasDiscussion()) {
1600: $haveDisc .= $resource->wrap_symb().':';
1601: $totdisc ++;
1602: }
1603: }
1604: if ($totdisc > 0) {
1605: $haveDisc =~ s/:$//;
1606: $result .= (<<END);
1607: <input type="hidden" name="navmaps" value="$haveDisc" />
1608: </form>
1609: END
1610: }
1611: }
1612: $result.='</form>';
1613: }
1614: if (($args->{'caller'} eq 'navmapsdisplay') &&
1615: ((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
1616: (&Apache::lonnet::allowed('cev',$env{'request.course.id'})))) {
1617: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1618: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1619: if ($env{'course.'.$env{'request.course.id'}.'.url'} eq
1620: "uploaded/$cdom/$cnum/default.sequence") {
1621: &add_linkitem($args->{'linkitems'},'edittoplevel',
1622: "javascript:gocmd('/adm/coursedocs','editdocs');",
1623: 'Content Editor');
1624: }
1625: }
1626:
1627: if ($args->{'caller'} eq 'navmapsdisplay') {
1628: $result .= &show_linkitems_toolbar($args,$condition);
1629: } elsif ($args->{'sort_html'}) {
1630: $result.=$args->{'sort_html'};
1631: }
1632:
1633: #$result .= "<br />\n";
1634: if ($r) {
1635: $r->print($result);
1636: $r->rflush();
1637: $result = "";
1638: }
1639: # End parameter setting
1640:
1641: $result .= "<br />\n";
1642:
1643: # Data
1644: $result.=&Apache::loncommon::start_data_table("LC_tableOfContent");
1645:
1646: my $res = "Apache::lonnavmaps::resource";
1647: my %condenseStatuses =
1648: ( $res->NETWORK_FAILURE => 1,
1649: $res->NOTHING_SET => 1,
1650: $res->CORRECT => 1 );
1651:
1652: # Shared variables
1653: $args->{'counter'} = 0; # counts the rows
1654: $args->{'indentLevel'} = 0;
1655: $args->{'isNewBranch'} = 0;
1656: $args->{'condensed'} = 0;
1657:
1658: my $location = &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace_21.gif");
1659: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' alt='' />");
1660: $args->{'displayedHereMarker'} = 0;
1661:
1662: # If we're suppressing empty sequences, look for them here.
1663: # We also do this even if $args->{'suppressEmptySequences'}
1664: # is not true, so we can hide empty sequences for which the
1665: # hiddenresource parameter is set to yes (at map level), or
1666: # mark as hidden for users who have $userCanSeeHidden.
1667: # Use DFS for speed, since structure actually doesn't matter,
1668: # except what map has what resources.
1669:
1670: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1671: $it->{FIRST_RESOURCE},
1672: $it->{FINISH_RESOURCE},
1673: {}, undef, 1);
1674:
1675: my $depth = 0;
1676: $dfsit->next();
1677: my $curRes = $dfsit->next();
1678: while ($depth > -1) {
1679: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1680: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1681:
1682: if (ref($curRes)) {
1683: # Parallel pre-processing: Do sequences have non-filtered-out children?
1684: if ($curRes->is_map()) {
1685: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1686: # Sequences themselves do not count as visible children,
1687: # unless those sequences also have visible children.
1688: # This means if a sequence appears, there's a "promise"
1689: # that there's something under it if you open it, somewhere.
1690: } elsif ($curRes->src()) {
1691: # Not a sequence: if it's filtered, ignore it, otherwise
1692: # rise up the stack and mark the sequences as having children
1693: if (&$filterFunc($curRes)) {
1694: for my $sequence (@{$dfsit->getStack()}) {
1695: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1696: }
1697: }
1698: }
1699: }
1700: } continue {
1701: $curRes = $dfsit->next();
1702: }
1703:
1704: my $displayedJumpMarker = 0;
1705: # Set up iteration.
1706: my $now = time();
1707: my $in24Hours = $now + 24 * 60 * 60;
1708: my $rownum = 0;
1709:
1710: # export "here" marker information
1711: $args->{'here'} = $here;
1712:
1713: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1714: my @resources;
1715: my $code='';# sub { !(shift->is_map();) };
1716: if ($args->{'sort'} eq 'title') {
1717: my $oldFilterFunc = $filterFunc;
1718: my $filterFunc=
1719: sub {
1720: my ($res)=@_;
1721: if ($res->is_map()) { return 0;}
1722: return &$oldFilterFunc($res);
1723: };
1724: @resources=$navmap->retrieveResources(undef,$filterFunc);
1725: @resources= sort { &cmp_title($a,$b) } @resources;
1726: } elsif ($args->{'sort'} eq 'duedate') {
1727: my $oldFilterFunc = $filterFunc;
1728: my $filterFunc=
1729: sub {
1730: my ($res)=@_;
1731: if (!$res->is_problem()) { return 0;}
1732: return &$oldFilterFunc($res);
1733: };
1734: @resources=$navmap->retrieveResources(undef,$filterFunc);
1735: @resources= sort {
1736: if ($a->duedate ne $b->duedate) {
1737: return $a->duedate cmp $b->duedate;
1738: }
1739: my $value=&cmp_title($a,$b);
1740: return $value;
1741: } @resources;
1742: } elsif ($args->{'sort'} eq 'discussion') {
1743: my $oldFilterFunc = $filterFunc;
1744: my $filterFunc=
1745: sub {
1746: my ($res)=@_;
1747: if (!$res->hasDiscussion() &&
1748: !$res->getFeedback() &&
1749: !$res->getErrors()) { return 0;}
1750: return &$oldFilterFunc($res);
1751: };
1752: @resources=$navmap->retrieveResources(undef,$filterFunc);
1753: @resources= sort { &cmp_title($a,$b) } @resources;
1754: } else {
1755: #unknow sort mechanism or default
1756: undef($args->{'sort'});
1757: }
1758:
1759: # Determine if page will be served with https in case
1760: # it contains a syllabus which uses an external URL
1761: # which points at an http site.
1762:
1763: my ($is_ssl,$cdom,$cnum,$hostname);
1764: if ($ENV{'SERVER_PORT'} == 443) {
1765: $is_ssl = 1;
1766: if ($r) {
1767: $hostname = $r->hostname();
1768: } else {
1769: $hostname = $ENV{'SERVER_NAME'};
1770: }
1771: }
1772: if ($env{'request.course.id'}) {
1773: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1774: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1775: }
1776:
1777: my $inhibitmenu;
1778: if ($args->{'modalLink'}) {
1779: $inhibitmenu = '&inhibitmenu=yes';
1780: }
1781:
1782: while (1) {
1783: if ($args->{'sort'}) {
1784: $curRes = shift(@resources);
1785: } else {
1786: $curRes = $it->next($closeAllPages);
1787: }
1788: if (!$curRes) { last; }
1789:
1790: # Maintain indentation level.
1791: if ($curRes == $it->BEGIN_MAP() ||
1792: $curRes == $it->BEGIN_BRANCH() ) {
1793: $args->{'indentLevel'}++;
1794: }
1795: if ($curRes == $it->END_MAP() ||
1796: $curRes == $it->END_BRANCH() ) {
1797: $args->{'indentLevel'}--;
1798: }
1799: # Notice new branches
1800: if ($curRes == $it->BEGIN_BRANCH()) {
1801: $args->{'isNewBranch'} = 1;
1802: }
1803:
1804: # If this isn't an actual resource, continue on
1805: if (!ref($curRes)) {
1806: next;
1807: }
1808:
1809: # If this has been filtered out, continue on
1810: if (!(&$filterFunc($curRes))) {
1811: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1812: next;
1813: }
1814:
1815: # If this is an empty sequence and we're filtering them, continue on
1816: $args->{'mapHidden'} = 0;
1817: $args->{'mapUnlisted'} = 0;
1818: $args->{'mapHiddenDeepLink'} = 0;
1819: if (($curRes->is_map()) && (!$curRes->{DATA}->{HAS_VISIBLE_CHILDREN})) {
1820: if ($args->{'suppressEmptySequences'}) {
1821: next;
1822: } else {
1823: my $mapname = &Apache::lonnet::declutter($curRes->src());
1824: $mapname = &Apache::lonnet::deversion($mapname);
1825: if (lc($navmap->get_mapparam(undef,$mapname,"0.hiddenresource")) eq 'yes') {
1826: if ($userCanSeeHidden) {
1827: $args->{'mapHidden'} = 1;
1828: } else {
1829: next;
1830: }
1831: } elsif ($curRes->deeplinkout) {
1832: if ($userCanSeeHidden) {
1833: $args->{'mapHiddenDeepLink'} = 1;
1834: } else {
1835: next;
1836: }
1837: } else {
1838: my $deeplink = $navmap->get_mapparam(undef,$mapname,"0.deeplink");
1839: my ($state,$others,$listed) = split(/,/,$deeplink);
1840: if (($listed eq 'absent') || ($listed eq 'grades')) {
1841: if ($userCanSeeHidden) {
1842: $args->{'mapUnlisted'} = 1;
1843: } else {
1844: next;
1845: }
1846: }
1847: }
1848: }
1849: }
1850:
1851: # If we're suppressing navmaps and this is a navmap, continue on
1852: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1853: next;
1854: }
1855:
1856: $args->{'counter'}++;
1857:
1858: # Does it have multiple parts?
1859: $args->{'multipart'} = 0;
1860: $args->{'condensed'} = 0;
1861: my @parts;
1862:
1863: # Decide what parts to show.
1864: if ($curRes->is_problem() && $showParts) {
1865: @parts = @{$curRes->parts()};
1866: $args->{'multipart'} = $curRes->multipart();
1867:
1868: if ($condenseParts) { # do the condensation
1869: if (!$args->{'condensed'}) {
1870: # Decide whether to condense based on similarity
1871: my $status = $curRes->status($parts[0]);
1872: my $due = $curRes->duedate($parts[0]);
1873: my $open = $curRes->opendate($parts[0]);
1874: my $statusAllSame = 1;
1875: my $dueAllSame = 1;
1876: my $openAllSame = 1;
1877: for (my $i = 1; $i < scalar(@parts); $i++) {
1878: if ($curRes->status($parts[$i]) != $status){
1879: $statusAllSame = 0;
1880: }
1881: if ($curRes->duedate($parts[$i]) != $due ) {
1882: $dueAllSame = 0;
1883: }
1884: if ($curRes->opendate($parts[$i]) != $open) {
1885: $openAllSame = 0;
1886: }
1887: }
1888: # $*allSame is true if all the statuses were
1889: # the same. Now, if they are all the same and
1890: # match one of the statuses to condense, or they
1891: # are all open with the same due date, or they are
1892: # all OPEN_LATER with the same open date, display the
1893: # status of the first non-zero part (to get the 'correct'
1894: # status right, since 0 is never 'correct' or 'open').
1895: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1896: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1897: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1898: @parts = ($parts[0]);
1899: $args->{'condensed'} = 1;
1900: }
1901: }
1902: # Multipart problem with one part: always "condense" (happens
1903: # to match the desirable behavior)
1904: if ($curRes->countParts() == 1) {
1905: @parts = ($parts[0]);
1906: $args->{'condensed'} = 1;
1907: }
1908: }
1909: }
1910: # If deep-link parameter is set (and is not set to full) suppress link
1911: # unless privileged user, tinyurl used for login resolved to a map, and
1912: # the resource is within the map.
1913: if ((!$curRes->deeplink($args->{'caller'})) ||
1914: ($curRes->deeplink($args->{'caller'}) eq 'full') || &advancedUser()) {
1915: $args->{'resource_nolink'} = 0;
1916: } else {
1917: $args->{'resource_nolink'} = 1;
1918: }
1919:
1920: # If the multipart problem was condensed, "forget" it was multipart
1921: if (scalar(@parts) == 1) {
1922: $args->{'multipart'} = 0;
1923: } else {
1924: # Add part 0 so we display it correctly.
1925: unshift @parts, '0';
1926: }
1927:
1928: {
1929: my ($src,$symb,$anchor,$stack);
1930: if ($args->{'sort'}) {
1931: my $it = $navmap->getIterator(undef, undef, undef, 1);
1932: while ( my $res=$it->next()) {
1933: if (ref($res) &&
1934: $res->symb() eq $curRes->symb()) { last; }
1935: }
1936: $stack=$it->getStack();
1937: } else {
1938: $stack=$it->getStack();
1939: }
1940: ($src,$symb,$anchor)=getLinkForResource($stack);
1941: my $srcHasQuestion = $src =~ /\?/;
1942: if ($env{'request.course.id'}) {
1943: if (($is_ssl) && ($src =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) &&
1944: ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
1945: unless ((&Apache::lonnet::uses_sts()) || (&Apache::lonnet::waf_allssl($hostname))) {
1946: if ($hostname ne '') {
1947: $src = 'http://'.$hostname.$src;
1948: }
1949: $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
1950: $srcHasQuestion = 1;
1951: }
1952: } elsif (($is_ssl) && ($src =~ m{^\Q/adm/wrapper/ext/\E(?!https:)})) {
1953: unless ((&Apache::lonnet::uses_sts()) || (&Apache::lonnet::waf_allssl($hostname))) {
1954: if ($hostname ne '') {
1955: $src = 'http://'.$hostname.$src;
1956: }
1957: $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
1958: $srcHasQuestion = 1;
1959: }
1960: }
1961: }
1962: if (defined($anchor)) { $anchor='#'.$anchor; }
1963: if (($args->{'caller'} eq 'sequence') && ($curRes->is_map())) {
1964: $args->{"resourceLink"} = $src.($srcHasQuestion?'&':'?') .'navmap=1';
1965: } else {
1966: $args->{"resourceLink"} = $src.
1967: ($srcHasQuestion?'&':'?') .
1968: 'symb=' . &escape($symb).$inhibitmenu.$anchor;
1969: }
1970: }
1971: # Now, we've decided what parts to show. Loop through them and
1972: # show them.
1973: foreach my $part (@parts) {
1974: $rownum ++;
1975:
1976: $result .= &Apache::loncommon::start_data_table_row();
1977:
1978: # Set up some data about the parts that the cols might want
1979: my $filter = $it->{FILTER};
1980:
1981: # Now, display each column.
1982: foreach my $col (@$cols) {
1983: my $colHTML = '';
1984: if (ref($col)) {
1985: $colHTML .= &$col($curRes, $part, $args);
1986: } else {
1987: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1988: }
1989:
1990: # If this is the first column and it's time to print
1991: # the anchor, do so
1992: if ($col == $cols->[0] &&
1993: $args->{'counter'} == $args->{'currentJumpIndex'} -
1994: $currentJumpDelta) {
1995: # Jam the anchor after the <td> tag;
1996: # necessary for valid HTML (which Mozilla requires)
1997: $colHTML =~ s/\>/\>\<a name="curloc" \>\<\/a\>/;
1998: $displayedJumpMarker = 1;
1999: }
2000: $result .= $colHTML . "\n";
2001: }
2002: $result .= &Apache::loncommon::end_data_table_row();
2003: $args->{'isNewBranch'} = 0;
2004: }
2005:
2006: if ($r && $rownum % 20 == 0) {
2007: $r->print($result);
2008: $result = "";
2009: $r->rflush();
2010: }
2011: } continue {
2012: if ($r) {
2013: # If we have the connection, make sure the user is still connected
2014: my $c = $r->connection;
2015: if ($c->aborted()) {
2016: # Who cares what we do, nobody will see it anyhow.
2017: return '';
2018: }
2019: }
2020: }
2021:
2022: $result.=&Apache::loncommon::end_data_table();
2023:
2024: # Print out the part that jumps to #curloc if it exists
2025: # delay needed because the browser is processing the jump before
2026: # it finishes rendering, so it goes to the wrong place!
2027: # onload might be better, but this routine has no access to that.
2028: # On mozilla, the 0-millisecond timeout seems to prevent this;
2029: # it's quite likely this might fix other browsers, too, and
2030: # certainly won't hurt anything.
2031: if ($displayedJumpMarker) {
2032: $result .= &Apache::lonhtmlcommon::scripttag("
2033: if (location.href.indexOf('#curloc')==-1) {
2034: setTimeout(\"location += '#curloc';\", 0)
2035: }
2036: ");
2037: }
2038:
2039: if ($r) {
2040: $r->print($result);
2041: $result = "";
2042: $r->rflush();
2043: }
2044:
2045: return $result;
2046: }
2047:
2048: sub add_linkitem {
2049: my ($linkitems,$name,$cmd,$text)=@_;
2050: $$linkitems{$name}{'cmd'}=$cmd;
2051: $$linkitems{$name}{'text'}=&mt($text);
2052: }
2053:
2054: sub show_linkitems_toolbar {
2055: my ($args,$condition) = @_;
2056: my $result;
2057: if (ref($args) eq 'HASH') {
2058: if (ref($args->{'linkitems'}) eq 'HASH') {
2059: my $numlinks = scalar(keys(%{$args->{'linkitems'}}));
2060: if ($numlinks > 1) {
2061: $result = '<td>'.
2062: &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',
2063: undef,'RAT').
2064: '</td>'.
2065: '<td> </td>'.
2066: '<td class="LC_middle">'.&mt('Tools:').'</td>';
2067: }
2068: $result .= '<td align="left">'."\n".
2069: '<ul id="LC_toolbar">';
2070: my @linkorder = ('firsthomework','everything','uncompleted',
2071: 'changefolder','clearbubbles','edittoplevel');
2072: foreach my $link (@linkorder) {
2073: if (ref($args->{'linkitems'}{$link}) eq 'HASH') {
2074: if ($args->{'linkitems'}{$link}{'text'} ne '') {
2075: $args->{'linkitems'}{$link}{'cmd'}=~s/"/'/g;
2076: if ($args->{'linkitems'}{$link}{'cmd'}) {
2077: my $link_id = 'LC_content_toolbar_'.$link;
2078: if ($link eq 'changefolder') {
2079: if ($condition) {
2080: $link_id='LC_content_toolbar_changefolder_toggled';
2081: } else {
2082: $link_id='LC_content_toolbar_changefolder';
2083: }
2084: }
2085: $result .= '<li><a href="#" '.
2086: 'onclick="'.$args->{'linkitems'}{$link}{'cmd'}.'" '.
2087: 'id="'.$link_id.'" '.
2088: 'class="LC_toolbarItem" '.
2089: 'title="'.$args->{'linkitems'}{$link}{'text'}.'">'.
2090: '</a></li>'."\n";
2091: }
2092: }
2093: }
2094: }
2095: $result .= '</ul>'.
2096: '</td>';
2097: if (($numlinks==1) && (exists($args->{'linkitems'}{'edittoplevel'}))) {
2098: $result .= '<td><a href="'.$args->{'linkitems'}{'edittoplevel'}{'cmd'}.'">'.
2099: &mt('Content Editor').'</a></td>';
2100: }
2101: }
2102: if ($args->{'sort_html'}) {
2103: $result .= '<td> </td><td> </td><td> </td>'.
2104: '<td align="right">'.$args->{'sort_html'}.'</td>';
2105: }
2106: }
2107: if ($result) {
2108: $result = "<table><tr>$result</tr></table>";
2109: }
2110: return $result;
2111: }
2112:
2113: 1;
2114:
2115:
2116:
2117:
2118:
2119:
2120:
2121:
2122:
2123: package Apache::lonnavmaps::navmap;
2124:
2125: =pod
2126:
2127: =head1 Object: Apache::lonnavmaps::navmap
2128:
2129: =head2 Overview
2130:
2131: The navmap object's job is to provide access to the resources
2132: in the course as Apache::lonnavmaps::resource objects, and to
2133: query and manage the relationship between those resource objects.
2134:
2135: Generally, you'll use the navmap object in one of three basic ways.
2136: In order of increasing complexity and power:
2137:
2138: =over 4
2139:
2140: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
2141: various ways to obtain resource objects, based on various identifiers.
2142: Use this when you want to request information about one object or
2143: a handful of resources you already know the identities of, from some
2144: other source. For more about Ids, Symbs, and MapPcs, see the
2145: Resource documentation. Note that Url should be a B<last resort>,
2146: not your first choice; it only really works when there is only one
2147: instance of the resource in the course, which only applies to
2148: maps, and even that may change in the future (see the B<getResourceByUrl>
2149: documentation for more details.)
2150:
2151: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
2152: retrieves resources matching some criterion and returns them
2153: in a flat array, with no structure information. Use this when
2154: you are manipulating a series of resources, based on what map
2155: the are in, but do not care about branching, or exactly how
2156: the maps and resources are related. This is the most common case.
2157:
2158: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
2159: the course's navmap in various ways without writing the traversal
2160: code yourself. See iterator documentation below. Use this when
2161: you need to know absolutely everything about the course, including
2162: branches and the precise relationship between maps and resources.
2163:
2164: =back
2165:
2166: =head2 Creation And Destruction
2167:
2168: To create a navmap object, use the following function:
2169:
2170: =over 4
2171:
2172: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
2173:
2174: Creates a new navmap object. Returns the navmap object if this is
2175: successful, or B<undef> if not.
2176:
2177: =back
2178:
2179: =head2 Methods
2180:
2181: =over 4
2182:
2183: =item * B<getIterator>(first, finish, filter, condition):
2184:
2185: See iterator documentation below.
2186:
2187: =cut
2188:
2189: use strict;
2190: use GDBM_File;
2191: use Apache::lonnet;
2192: use LONCAPA;
2193:
2194: sub new {
2195: # magic invocation to create a class instance
2196: my $proto = shift;
2197: my $class = ref($proto) || $proto;
2198: my $self = {};
2199: bless($self); # So we can call change_user if necessary
2200:
2201: $self->{USERNAME} = shift || $env{'user.name'};
2202: $self->{DOMAIN} = shift || $env{'user.domain'};
2203: $self->{CODE} = shift;
2204: $self->{NOHIDE} = shift;
2205:
2206:
2207:
2208: # Resource cache stores navmap resources as we reference them. We generate
2209: # them on-demand so we don't pay for creating resources unless we use them.
2210: $self->{RESOURCE_CACHE} = {};
2211:
2212: # Network failure flag, if we accessed the course or user opt and
2213: # failed
2214: $self->{NETWORK_FAILURE} = 0;
2215:
2216: # We can only tie the nav hash as done below if the username/domain
2217: # match the env one. Otherwise change_user does everything we need...since we can't
2218: # assume there are course hashes for the specific requested user:domain
2219: # Note: change_user is also called if we need the nav hash when printing CODEd
2220: # assignments or printing an exam, in which the enclosing folder for the items in
2221: # the exam has hidden set.
2222: #
2223:
2224: if (($self->{USERNAME} eq $env{'user.name'}) && ($self->{DOMAIN} eq $env{'user.domain'}) &&
2225: !$self->{CODE} && !$self->{NOHIDE}) {
2226:
2227: # tie the nav hash
2228:
2229: my %navmaphash;
2230: my %parmhash;
2231: my $courseFn = $env{"request.course.fn"};
2232: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
2233: &GDBM_READER(), 0640))) {
2234: return undef;
2235: }
2236:
2237: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
2238: &GDBM_READER(), 0640)))
2239: {
2240: untie %{$self->{PARM_HASH}};
2241: return undef;
2242: }
2243:
2244: $self->{NAV_HASH} = \%navmaphash;
2245: $self->{PARM_HASH} = \%parmhash;
2246: $self->{PARM_CACHE} = {};
2247: } else {
2248: $self->change_user($self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE});
2249: }
2250:
2251: return $self;
2252: }
2253:
2254: #
2255: # In some instances it is useful to be able to dynamically change the
2256: # username/domain associated with a navmap (e.g. to navigate for someone
2257: # else besides the current user...if sufficiently privileged.
2258: # Parameters:
2259: # user - New user.
2260: # domain- Domain the user belongs to.
2261: # code - Anonymous CODE in use.
2262: # Implicit inputs:
2263: #
2264: sub change_user {
2265: my $self = shift;
2266: $self->{USERNAME} = shift;
2267: $self->{DOMAIN} = shift;
2268: $self->{CODE} = shift;
2269: $self->{NOHIDE} = shift;
2270:
2271: # If the hashes are already tied make sure to break that bond:
2272:
2273: untie %{$self->{NAV_HASH}};
2274: untie %{$self->{PARM_HASH}};
2275:
2276: # The assumption is that we have to
2277: # use lonmap here to re-read the hash and from it reconstruct
2278: # new big and parameter hashes. An implicit assumption at this time
2279: # is that the course file is probably not created locally yet
2280: # an that we will therefore just read without tying.
2281:
2282: my ($cdom, $cnum) = split(/\_/, $env{'request.course.id'});
2283:
2284: my %big_hash;
2285: &Apache::lonmap::loadmap($cnum, $cdom, $self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE}, \%big_hash);
2286: $self->{NAV_HASH} = \%big_hash;
2287:
2288:
2289:
2290: # Now clear the parm cache and reconstruct the parm hash fromt he big_hash
2291: # param.xxxx keys.
2292:
2293: $self->{PARM_CACHE} = {};
2294:
2295: my %parm_hash = {};
2296: foreach my $key (keys(%big_hash)) {
2297: if ($key =~ /^param\./) {
2298: my $param_key = $key;
2299: $param_key =~ s/^param\.//;
2300: $parm_hash{$param_key} = $big_hash{$key};
2301: }
2302: }
2303:
2304: $self->{PARM_HASH} = \%parm_hash;
2305:
2306: }
2307:
2308: sub generate_course_user_opt {
2309: my $self = shift;
2310: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
2311:
2312: my $uname=$self->{USERNAME};
2313: my $udom=$self->{DOMAIN};
2314:
2315: my $cid=$env{'request.course.id'};
2316: my $cdom=$env{'course.'.$cid.'.domain'};
2317: my $cnum=$env{'course.'.$cid.'.num'};
2318:
2319: # ------------------------------------------------- Get coursedata (if present)
2320: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
2321: # Check for network failure
2322: if (!ref($courseopt)) {
2323: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
2324: $self->{NETWORK_FAILURE} = 1;
2325: }
2326: undef($courseopt);
2327: }
2328:
2329: # --------------------------------------------------- Get userdata (if present)
2330:
2331: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
2332: # Check for network failure
2333: if (!ref($useropt)) {
2334: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
2335: $self->{NETWORK_FAILURE} = 1;
2336: }
2337: undef($useropt);
2338: }
2339:
2340: $self->{COURSE_OPT} = $courseopt;
2341: $self->{USER_OPT} = $useropt;
2342:
2343: $self->{COURSE_USER_OPT_GENERATED} = 1;
2344:
2345: return;
2346: }
2347:
2348:
2349:
2350: sub generate_email_discuss_status {
2351: my $self = shift;
2352: my $symb = shift;
2353: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
2354:
2355: my $cid=$env{'request.course.id'};
2356: my $cdom=$env{'course.'.$cid.'.domain'};
2357: my $cnum=$env{'course.'.$cid.'.num'};
2358:
2359: my %emailstatus = &Apache::lonnet::dump('email_status',$self->{DOMAIN},$self->{USERNAME});
2360: my $logoutTime = $emailstatus{'logout'};
2361: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
2362: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2363: $courseLeaveTime : $logoutTime);
2364: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2365: $cdom, $cnum);
2366: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
2367: $self->{DOMAIN},$self->{USERNAME},'lastread');
2368: my %lastreadtime = ();
2369: foreach my $key (keys(%lastread)) {
2370: my $shortkey = $key;
2371: $shortkey =~ s/_lastread$//;
2372: $lastreadtime{$shortkey} = $lastread{$key};
2373: }
2374:
2375: my %feedback=();
2376: my %error=();
2377: my @keys = &Apache::lonnet::getkeys('nohist_email',$self->{DOMAIN},
2378: $self->{USERNAME});
2379:
2380: foreach my $msgid (@keys) {
2381: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
2382: my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
2383: $symb,$error) = &Apache::lonmsg::unpackmsgid(&LONCAPA::escape($msgid));
2384: &Apache::lonenc::check_decrypt(\$symb);
2385: if (($fromcid ne '') && ($fromcid ne $cid)) {
2386: next;
2387: }
2388: if (defined($symb)) {
2389: if (defined($error) && $error == 1) {
2390: $error{$symb}.=','.$msgid;
2391: } else {
2392: $feedback{$symb}.=','.$msgid;
2393: }
2394: } else {
2395: my $plain=
2396: &LONCAPA::unescape(&LONCAPA::unescape($msgid));
2397: if ($plain=~/ \[([^\]]+)\]\:/) {
2398: my $url=$1;
2399: if ($plain=~/\:Error \[/) {
2400: $error{$url}.=','.$msgid;
2401: } else {
2402: $feedback{$url}.=','.$msgid;
2403: }
2404: }
2405: }
2406: }
2407: }
2408:
2409: #symbs of resources that have feedbacks (will be urls pre-2.3)
2410: $self->{FEEDBACK} = \%feedback;
2411: #or errors (will be urls pre 2.3)
2412: $self->{ERROR_MSG} = \%error;
2413: $self->{DISCUSSION_TIME} = \%discussiontime;
2414: $self->{EMAIL_STATUS} = \%emailstatus;
2415: $self->{LAST_READ} = \%lastreadtime;
2416:
2417: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2418: }
2419:
2420: sub get_user_data {
2421: my $self = shift;
2422: if ($self->{RETRIEVED_USER_DATA}) { return; }
2423:
2424: # Retrieve performance data on problems
2425: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
2426: $self->{DOMAIN},
2427: $self->{USERNAME});
2428: $self->{STUDENT_DATA} = \%student_data;
2429:
2430: $self->{RETRIEVED_USER_DATA} = 1;
2431: }
2432:
2433: sub get_discussion_data {
2434: my $self = shift;
2435: if ($self->{RETRIEVED_DISCUSSION_DATA}) {
2436: return $self->{DISCUSSION_DATA};
2437: }
2438:
2439: $self->generate_email_discuss_status();
2440:
2441: my $cid=$env{'request.course.id'};
2442: my $cdom=$env{'course.'.$cid.'.domain'};
2443: my $cnum=$env{'course.'.$cid.'.num'};
2444: # Retrieve discussion data for resources in course
2445: my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
2446:
2447:
2448: $self->{DISCUSSION_DATA} = \%discussion_data;
2449: $self->{RETRIEVED_DISCUSSION_DATA} = 1;
2450: return $self->{DISCUSSION_DATA};
2451: }
2452:
2453:
2454: # Internal function: Takes a key to look up in the nav hash and implements internal
2455: # memory caching of that key.
2456: sub navhash {
2457: my $self = shift; my $key = shift;
2458: return $self->{NAV_HASH}->{$key};
2459: }
2460:
2461: =pod
2462:
2463: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2464: false otherwise. Undefined course maps indicate an error somewhere in
2465: LON-CAPA, and you will not be able to proceed with using the navmap.
2466: See the B<NAV> screen for an example of using this.
2467:
2468: =cut
2469:
2470: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2471: sub courseMapDefined {
2472: my $self = shift;
2473: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
2474:
2475: my $firstres = $self->navhash("map_start_$uri");
2476: my $lastres = $self->navhash("map_finish_$uri");
2477: return $firstres && $lastres;
2478: }
2479:
2480: sub getIterator {
2481: my $self = shift;
2482: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
2483: shift, undef, shift,
2484: shift, shift, shift);
2485: return $iterator;
2486: }
2487:
2488: # Private method: Does the given resource (as a symb string) have
2489: # current discussion? Returns 0 if chat/mail data not extracted.
2490: sub hasDiscussion {
2491: my $self = shift;
2492: my $symb = shift;
2493: $self->generate_email_discuss_status();
2494:
2495: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2496:
2497: #return defined($self->{DISCUSSION_TIME}->{$symb});
2498:
2499: # backward compatibility (bulletin boards used to be 'wrapped')
2500: my $ressymb = $self->wrap_symb($symb);
2501: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2502: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2503: } else {
2504: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2505: 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).
2506: }
2507: }
2508:
2509: sub last_post_time {
2510: my $self = shift;
2511: my $symb = shift;
2512: my $ressymb = $self->wrap_symb($symb);
2513: return $self->{DISCUSSION_TIME}->{$ressymb};
2514: }
2515:
2516: sub discussion_info {
2517: my $self = shift;
2518: my $symb = shift;
2519: my $filter = shift;
2520:
2521: $self->get_discussion_data();
2522:
2523: my $ressymb = $self->wrap_symb($symb);
2524: # keys used to store bulletinboard postings use 'unwrapped' symb.
2525: my $discsymb = &escape($self->unwrap_symb($ressymb));
2526: my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
2527: if (!$version) { return; }
2528:
2529: my $prevread = $self->{LAST_READ}{$ressymb};
2530:
2531: my $count = 0;
2532: my $hiddenflag = 0;
2533: my $deletedflag = 0;
2534: my ($hidden,$deleted,%info);
2535:
2536: for (my $id=$version; $id>0; $id--) {
2537: my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
2538: my @keys=split(/:/,$vkeys);
2539: if (grep(/^hidden$/ ,@keys)) {
2540: if (!$hiddenflag) {
2541: $hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
2542: $hiddenflag = 1;
2543: }
2544: } elsif (grep(/^deleted$/,@keys)) {
2545: if (!$deletedflag) {
2546: $deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
2547: $deletedflag = 1;
2548: }
2549: } else {
2550: if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
2551: if ($filter eq 'unread') {
2552: if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
2553: next;
2554: }
2555: }
2556: $count++;
2557: $info{$count}{'subject'} =
2558: $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
2559: $info{$count}{'id'} = $id;
2560: $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
2561: }
2562: }
2563: }
2564: if (wantarray) {
2565: return ($count,%info);
2566: }
2567: return $count;
2568: }
2569:
2570: sub wrap_symb {
2571: my $self = shift;
2572: my $symb = shift;
2573: if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
2574: unless ($symb =~ m|adm/wrapper/adm|) {
2575: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
2576: }
2577: }
2578: return $symb;
2579: }
2580:
2581: sub unwrap_symb {
2582: my $self = shift;
2583: my $ressymb = shift;
2584: my $discsymb = $ressymb;
2585: if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
2586: $discsymb = $1.$2;
2587: }
2588: return $discsymb;
2589: }
2590:
2591: # Private method: Does the given resource (as a symb string) have
2592: # current feedback? Returns the string in the feedback hash, which
2593: # will be false if it does not exist.
2594:
2595: sub getFeedback {
2596: my $self = shift;
2597: my $symb = shift;
2598: my $source = shift;
2599:
2600: $self->generate_email_discuss_status();
2601:
2602: if (!defined($self->{FEEDBACK})) { return ""; }
2603:
2604: my $feedback;
2605: if ($self->{FEEDBACK}->{$symb}) {
2606: $feedback = $self->{FEEDBACK}->{$symb};
2607: if ($self->{FEEDBACK}->{$source}) {
2608: $feedback .= ','.$self->{FEEDBACK}->{$source};
2609: }
2610: } else {
2611: if ($self->{FEEDBACK}->{$source}) {
2612: $feedback = $self->{FEEDBACK}->{$source};
2613: }
2614: }
2615: return $feedback;
2616: }
2617:
2618: # Private method: Get the errors for that resource (by source).
2619: sub getErrors {
2620: my $self = shift;
2621: my $symb = shift;
2622: my $src = shift;
2623:
2624: $self->generate_email_discuss_status();
2625:
2626: if (!defined($self->{ERROR_MSG})) { return ""; }
2627:
2628: my $errors;
2629: if ($self->{ERROR_MSG}->{$symb}) {
2630: $errors = $self->{ERROR_MSG}->{$symb};
2631: if ($self->{ERROR_MSG}->{$src}) {
2632: $errors .= ','.$self->{ERROR_MSG}->{$src};
2633: }
2634: } else {
2635: if ($self->{ERROR_MSG}->{$src}) {
2636: $errors = $self->{ERROR_MSG}->{$src};
2637: }
2638: }
2639: return $errors;
2640: }
2641:
2642: =pod
2643:
2644: =item * B<getById>(id):
2645:
2646: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2647: object for that resource. This method, or other methods that use it
2648: (as in the resource object) is the only proper way to obtain a
2649: resource object.
2650:
2651: =item * B<getBySymb>(symb):
2652:
2653: Based on the symb of the resource, get a resource object for that
2654: resource. This is one of the proper ways to get a resource object.
2655:
2656: =item * B<getByMapPc>(map_pc):
2657:
2658: Based on the map_pc of the resource, get a resource object for
2659: the given map. This is one of the proper ways to get a resource object.
2660:
2661: =cut
2662:
2663: # The strategy here is to cache the resource objects, and only construct them
2664: # as we use them. The real point is to prevent reading any more from the tied
2665: # hash than we have to, which should hopefully alleviate speed problems.
2666:
2667: sub getById {
2668: my $self = shift;
2669: my $id = shift;
2670:
2671: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2672: {
2673: return $self->{RESOURCE_CACHE}->{$id};
2674: }
2675:
2676: # resource handles inserting itself into cache.
2677: # Not clear why the quotes are necessary, but as of this
2678: # writing it doesn't work without them.
2679: return "Apache::lonnavmaps::resource"->new($self, $id);
2680: }
2681:
2682: sub getBySymb {
2683: my $self = shift;
2684: my $symb = shift;
2685:
2686: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
2687: my $map = $self->getResourceByUrl($mapUrl);
2688: my $returnvalue = undef;
2689: if (ref($map)) {
2690: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2691: }
2692: return $returnvalue;
2693: }
2694:
2695: sub getByMapPc {
2696: my $self = shift;
2697: my $map_pc = shift;
2698: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2699: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2700: return $self->getById($map_id);
2701: }
2702:
2703: =pod
2704:
2705: =item * B<firstResource>():
2706:
2707: Returns a resource object reference corresponding to the first
2708: resource in the navmap.
2709:
2710: =cut
2711:
2712: sub firstResource {
2713: my $self = shift;
2714: my $firstResource = $self->navhash('map_start_' .
2715: &Apache::lonnet::clutter($env{'request.course.uri'}));
2716: return $self->getById($firstResource);
2717: }
2718:
2719: =pod
2720:
2721: =item * B<finishResource>():
2722:
2723: Returns a resource object reference corresponding to the last resource
2724: in the navmap.
2725:
2726: =cut
2727:
2728: sub finishResource {
2729: my $self = shift;
2730: my $firstResource = $self->navhash('map_finish_' .
2731: &Apache::lonnet::clutter($env{'request.course.uri'}));
2732: return $self->getById($firstResource);
2733: }
2734:
2735: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2736: # the actual lookup; parmval caches the results.
2737: sub parmval {
2738: my $self = shift;
2739: my ($what,$symb,$recurse)=@_;
2740: my $hashkey = $what."|||".$symb;
2741: my $cache = $self->{PARM_CACHE};
2742: if (defined($self->{PARM_CACHE}->{$hashkey})) {
2743: if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {
2744: if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {
2745: if (wantarray) {
2746: return @{$self->{PARM_CACHE}->{$hashkey}};
2747: } else {
2748: return $self->{PARM_CACHE}->{$hashkey}->[0];
2749: }
2750: }
2751: } else {
2752: return $self->{PARM_CACHE}->{$hashkey};
2753: }
2754: }
2755: my $result = $self->parmval_real($what, $symb, $recurse);
2756: $self->{PARM_CACHE}->{$hashkey} = $result;
2757: if (wantarray) {
2758: return @{$result};
2759: }
2760: return $result->[0];
2761: }
2762:
2763:
2764: sub parmval_real {
2765: my $self = shift;
2766: my ($what,$symb,$recurse) = @_;
2767:
2768:
2769: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2770: $self->generate_course_user_opt();
2771:
2772: my $cid=$env{'request.course.id'};
2773: my $csec=$env{'request.course.sec'};
2774: my $cgroup='';
2775: my @cgrps=split(/:/,$env{'request.course.groups'});
2776: if (@cgrps > 0) {
2777: @cgrps = sort(@cgrps);
2778: $cgroup = $cgrps[0];
2779: }
2780: my $uname=$self->{USERNAME};
2781: my $udom=$self->{DOMAIN};
2782:
2783: unless ($symb) { return ['']; }
2784: my $result='';
2785:
2786: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
2787: $mapname = &Apache::lonnet::deversion($mapname);
2788: # ----------------------------------------------------- Cascading lookup scheme
2789: my $rwhat=$what;
2790: $what=~s/^parameter\_//;
2791: $what=~s/\_/\./;
2792:
2793: my $symbparm=$symb.'.'.$what;
2794: my $mapparm=$mapname.'___(all).'.$what;
2795: my $usercourseprefix=$cid;
2796:
2797:
2798:
2799: my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
2800: my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
2801: my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
2802:
2803:
2804: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2805: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2806: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2807:
2808:
2809: my $courselevel= $usercourseprefix.'.'.$what;
2810: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2811: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2812:
2813:
2814: my $useropt = $self->{USER_OPT};
2815: my $courseopt = $self->{COURSE_OPT};
2816: my $parmhash = $self->{PARM_HASH};
2817:
2818: # ---------------------------------------------------------- first, check user
2819: if ($uname and defined($useropt)) {
2820: if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }
2821: if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }
2822: if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }
2823: }
2824:
2825: # ------------------------------------------------------- second, check course
2826: if ($cgroup ne '' and defined($courseopt)) {
2827: if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }
2828: if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }
2829: if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }
2830: }
2831:
2832: if ($csec and defined($courseopt)) {
2833: if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }
2834: if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }
2835: if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }
2836: }
2837:
2838: if (defined($courseopt)) {
2839: if (defined($$courseopt{$courselevelr})) { return [$$courseopt{$courselevelr},'resource']; }
2840: }
2841:
2842: # ----------------------------------------------------- third, check map parms
2843:
2844: my $thisparm=$$parmhash{$symbparm};
2845: if (defined($thisparm)) { return [$thisparm,'map']; }
2846:
2847: # ----------------------------------------------------- fourth , check default
2848:
2849: my $meta_rwhat=$rwhat;
2850: $meta_rwhat=~s/\./_/g;
2851: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
2852: if (defined($default)) { return [$default,'resource']}
2853: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
2854: if (defined($default)) { return [$default,'resource']}
2855: # --------------------------------------------------- fifth, check more course
2856: if (defined($courseopt)) {
2857: if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }
2858: if (defined($$courseopt{$courselevel})) {
2859: my $ret = [$$courseopt{$courselevel},'course'];
2860: return $ret;
2861: }
2862: }
2863: # --------------------------------------------------- sixth , cascade up parts
2864:
2865: my ($space,@qualifier)=split(/\./,$rwhat);
2866: my $qualifier=join('.',@qualifier);
2867: unless ($space eq '0') {
2868: my @parts=split(/_/,$space);
2869: my $id=pop(@parts);
2870: my $part=join('_',@parts);
2871: if ($part eq '') { $part='0'; }
2872: my @partgeneral=$self->parmval($part.".$qualifier",$symb,1);
2873: if (defined($partgeneral[0])) { return \@partgeneral; }
2874: }
2875: if ($recurse) { return []; }
2876: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat);
2877: if (defined($pack_def)) { return [$pack_def,'resource']; }
2878: return [''];
2879: }
2880:
2881: sub recurseup_maps {
2882: my ($self,$mapname) = @_;
2883: my @recurseup;
2884: if ($mapname) {
2885: my $res = $self->getResourceByUrl($mapname);
2886: if (ref($res)) {
2887: my @pcs = split(/,/,$res->map_hierarchy());
2888: shift(@pcs);
2889: if (@pcs) {
2890: @recurseup = map { &Apache::lonnet::declutter($self->getByMapPc($_)->src()); } reverse(@pcs);
2891: }
2892: }
2893: }
2894: return @recurseup;
2895: }
2896:
2897: sub recursed_crumbs {
2898: my ($self,$mapurl,$restitle) = @_;
2899: my (@revmapinfo,@revmapres);
2900: my $mapres = $self->getResourceByUrl($mapurl);
2901: if (ref($mapres)) {
2902: @revmapres = map { $self->getByMapPc($_); } split(/,/,$mapres->map_breadcrumbs());
2903: shift(@revmapres);
2904: }
2905: my $allowedlength = 60;
2906: my $minlength = 5;
2907: my $allowedtitle = 30;
2908: if (($env{'environment.icons'} eq 'iconsonly') && (!$env{'browser.mobile'})) {
2909: $allowedlength = 100;
2910: $allowedtitle = 70;
2911: }
2912: if (length($restitle) > $allowedtitle) {
2913: $restitle = &truncate_crumb_text($restitle,$allowedtitle);
2914: }
2915: my $totallength = length($restitle);
2916: my @links;
2917:
2918: foreach my $map (@revmapres) {
2919: my $pc = $map->map_pc();
2920: next if ((!$pc) || ($pc == 1));
2921: push(@links,$map);
2922: push(@revmapinfo,{'href' => $env{'request.use_absolute'}.$map->link().'?navmap=1','text' => $map->title(),'no_mt' => 1,});
2923: $totallength += length($map->title());
2924: }
2925: my $numlinks = scalar(@links);
2926: if ($numlinks) {
2927: if ($totallength - $allowedlength > 0) {
2928: my $available = $allowedlength - length($restitle);
2929: my $avg = POSIX::ceil($available/$numlinks);
2930: if ($avg < $minlength) {
2931: $avg = $minlength;
2932: }
2933: @revmapinfo = ();
2934: foreach my $map (@links) {
2935: my $showntitle = &truncate_crumb_text($map->title(),$avg);
2936: if ($showntitle ne '') {
2937: push(@revmapinfo,{'href' => $env{'request.use_absolute'}.$map->link().'?navmap=1','text' => $showntitle,'no_mt' => 1,});
2938: }
2939: }
2940: }
2941: }
2942: if ($restitle ne '') {
2943: push(@revmapinfo,{'text' => $restitle, 'no_mt' => 1});
2944: }
2945: return @revmapinfo;
2946: }
2947:
2948: sub truncate_crumb_text {
2949: my ($title,$limit) = @_;
2950: my $showntitle = '';
2951: if (length($title) > $limit) {
2952: my @words = split(/\b\s*/,$title);
2953: if (@words == 1) {
2954: $showntitle = substr($title,0,$limit).' ...';
2955: } else {
2956: my $linklength = 0;
2957: my $num = 0;
2958: foreach my $word (@words) {
2959: $linklength += 1+length($word);
2960: if ($word eq '-') {
2961: $showntitle =~ s/ $//;
2962: $showntitle .= $word;
2963: } elsif ($linklength > $limit) {
2964: if ($num < @words) {
2965: $showntitle .= $word.' ...';
2966: last;
2967: } else {
2968: $showntitle .= $word;
2969: }
2970: } else {
2971: $showntitle .= $word.' ';
2972: }
2973: }
2974: $showntitle =~ s/ $//;
2975: }
2976: return $showntitle;
2977: } else {
2978: return $title;
2979: }
2980: }
2981:
2982: #
2983: # Determines the open/close dates for printing a map that
2984: # encloses a resource.
2985: #
2986: sub map_printdates {
2987: my ($self, $res, $part) = @_;
2988:
2989:
2990:
2991:
2992:
2993: my $opendate = $self->get_mapparam($res->symb(),'',"$part.printstartdate");
2994: my $closedate= $self->get_mapparam($res->symb(),'', "$part.printenddate");
2995:
2996:
2997: return ($opendate, $closedate);
2998: }
2999:
3000: sub get_mapparam {
3001: my ($self, $symb, $mapname, $what) = @_;
3002:
3003: # Ensure the course option hash is populated:
3004:
3005: $self->generate_course_user_opt();
3006:
3007: # Get the course id and section if there is one.
3008:
3009: my $cid=$env{'request.course.id'};
3010: my $csec=$env{'request.course.sec'};
3011: my $cgroup='';
3012: my @cgrps=split(/:/,$env{'request.course.groups'});
3013: if (@cgrps > 0) {
3014: @cgrps = sort(@cgrps);
3015: $cgroup = $cgrps[0];
3016: }
3017: my $uname=$self->{USERNAME};
3018: my $udom=$self->{DOMAIN};
3019:
3020: unless ($symb || $mapname) { return; }
3021: my $result='';
3022: my ($recursed,@recurseup);
3023:
3024: # Figure out which map we are in.
3025:
3026: if ($symb && !$mapname) {
3027: my ($id,$fn);
3028: ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
3029: $mapname = &Apache::lonnet::deversion($mapname);
3030: }
3031:
3032: my $rwhat=$what;
3033: $what=~s/^parameter\_//;
3034: $what=~s/\_/\./;
3035:
3036: # Build the hash keys for the lookup:
3037:
3038: my $symbparm=$symb.'.'.$what;
3039: my $mapparm=$mapname.'___(all).'.$what;
3040: my $usercourseprefix=$cid;
3041:
3042:
3043: my $grplevel = "$usercourseprefix.[$cgroup].$mapparm";
3044: my $seclevel = "$usercourseprefix.[$csec].$mapparm";
3045: my $courselevel = "$usercourseprefix.$mapparm";
3046:
3047:
3048: # Get handy references to the hashes we need in $self:
3049:
3050: my $useropt = $self->{USER_OPT};
3051: my $courseopt = $self->{COURSE_OPT};
3052: my $parmhash = $self->{PARM_HASH};
3053:
3054: # Check per user
3055:
3056:
3057:
3058: if ($uname and defined($useropt)) {
3059: if (defined($$useropt{$courselevel})) {
3060: return $$useropt{$courselevel};
3061: }
3062: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3063: unless ($recursed) {
3064: @recurseup = $self->recurseup_maps($mapname);
3065: $recursed = 1;
3066: }
3067: foreach my $item (@recurseup) {
3068: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
3069: if (defined($$useropt{$norecursechk})) {
3070: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3071: return $$useropt{$norecursechk};
3072: }
3073: }
3074: }
3075: }
3076: }
3077:
3078: # Check course -- group
3079:
3080:
3081:
3082: if ($cgroup ne '' and defined ($courseopt)) {
3083: if (defined($$courseopt{$grplevel})) {
3084: return $$courseopt{$grplevel};
3085: }
3086: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3087: unless ($recursed) {
3088: @recurseup = $self->recurseup_maps($mapname);
3089: $recursed = 1;
3090: }
3091: foreach my $item (@recurseup) {
3092: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
3093: if (defined($$courseopt{$norecursechk})) {
3094: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3095: return $$courseopt{$norecursechk};
3096: }
3097: }
3098: }
3099: }
3100: }
3101:
3102: # Check course -- section
3103:
3104:
3105:
3106:
3107:
3108: if ($csec and defined($courseopt)) {
3109: if (defined($$courseopt{$seclevel})) {
3110: return $$courseopt{$seclevel};
3111: }
3112: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3113: unless ($recursed) {
3114: @recurseup = $self->recurseup_maps($mapname);
3115: $recursed = 1;
3116: }
3117: foreach my $item (@recurseup) {
3118: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
3119: if (defined($$courseopt{$norecursechk})) {
3120: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3121: return $$courseopt{$norecursechk};
3122: }
3123: }
3124: }
3125: }
3126: }
3127: # Check the map parameters themselves:
3128:
3129: if ($symb) {
3130: my $symbparm=$symb.'.'.$what;
3131: my $thisparm = $$parmhash{$symbparm};
3132: if (defined($thisparm)) {
3133: return $thisparm;
3134: }
3135: }
3136:
3137:
3138: # Additional course parameters:
3139:
3140: if (defined($courseopt)) {
3141: if (defined($$courseopt{$courselevel})) {
3142: return $$courseopt{$courselevel};
3143: }
3144: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3145: unless ($recursed) {
3146: @recurseup = $self->recurseup_maps($mapname);
3147: $recursed = 1;
3148: }
3149: foreach my $item (@recurseup) {
3150: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
3151: if (defined($$courseopt{$norecursechk})) {
3152: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3153: return $$courseopt{$norecursechk};
3154: }
3155: }
3156: }
3157: }
3158: }
3159: return undef; # Unefined if we got here.
3160: }
3161:
3162: sub course_printdates {
3163: my ($self, $symb, $part) = @_;
3164:
3165:
3166: my $opendate = $self->getcourseparam($symb, $part . '.printstartdate');
3167: my $closedate = $self->getcourseparam($symb, $part . '.printenddate');
3168: return ($opendate, $closedate);
3169:
3170: }
3171:
3172: sub getcourseparam {
3173: my ($self, $symb, $what) = @_;
3174:
3175: $self->generate_course_user_opt(); # If necessary populate the hashes.
3176:
3177: my $uname = $self->{USERNAME};
3178: my $udom = $self->{DOMAIN};
3179:
3180: # Course, section, group ids come from the env:
3181:
3182: my $cid = $env{'request.course.id'};
3183: my $csec = $env{'request.course.sec'};
3184: my $cgroup = ''; # Assume no group
3185:
3186: my @cgroups = split(/:/, $env{'request.course.groups'});
3187: if(@cgroups > 0) {
3188: @cgroups = sort(@cgroups);
3189: $cgroup = $cgroups[0]; # There is a course group.
3190: }
3191: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
3192: $mapname = &Apache::lonnet::deversion($mapname);
3193:
3194: #
3195: # Make the various lookup keys:
3196: #
3197:
3198: $what=~s/^parameter\_//;
3199: $what=~s/\_/\./;
3200:
3201:
3202: my $symbparm = $symb . '.' . $what;
3203: my $mapparm=$mapname.'___(all).'.$what;
3204:
3205: # Local refs to the hashes we're going to look at:
3206:
3207: my $useropt = $self->{USER_OPT};
3208: my $courseopt = $self->{COURSE_OPT};
3209:
3210: #
3211: # We want the course level stuff from the way
3212: # parmval_real operates
3213: # TODO: Factor some of this stuff out of
3214: # both parmval_real and here
3215: #
3216: my $courselevel = $cid . '.' . $what;
3217: my $grplevel = $cid . '.[' . $cgroup . ']' . $what;
3218: my $seclevel = $cid . '.[' . $csec . ']' . $what;
3219:
3220:
3221: # Try for the user's course level option:
3222:
3223: if ($uname and defined($useropt)) {
3224: if (defined($$useropt{$courselevel})) {
3225: return $$useropt{$courselevel};
3226: }
3227: }
3228: # Try for the group's course level option:
3229:
3230: if ($cgroup ne '' and defined($courseopt)) {
3231: if (defined($$courseopt{$grplevel})) {
3232: return $$courseopt{$grplevel};
3233: }
3234: }
3235:
3236: # Try for section level parameters:
3237:
3238: if ($csec ne '' and defined($courseopt)) {
3239: if (defined($$courseopt{$seclevel})) {
3240: return $$courseopt{$seclevel};
3241: }
3242: }
3243: # Try for 'additional' course parameters:
3244:
3245: if (defined($courseopt)) {
3246: if (defined($$courseopt{$courselevel})) {
3247: return $$courseopt{$courselevel};
3248: }
3249: }
3250: return undef;
3251:
3252: }
3253:
3254:
3255: =pod
3256:
3257: =item * B<getResourceByUrl>(url,multiple):
3258:
3259: Retrieves a resource object by URL of the resource, unless the optional
3260: multiple parameter is included in which case an array of resource
3261: objects is returned. If passed a resource object, it will simply return
3262: it, so it is safe to use this method in code like
3263: "$res = $navmap->getResourceByUrl($res)"
3264: if you're not sure if $res is already an object, or just a URL. If the
3265: resource appears multiple times in the course, only the first instance
3266: will be returned (useful for maps), unless the multiple parameter has
3267: been included, in which case all instances are returned in an array.
3268:
3269: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall, noblockcheck):
3270:
3271: The map is a specification of a map to retreive the resources from,
3272: either as a url or as an object. The filterFunc is a reference to a
3273: function that takes a resource object as its one argument and returns
3274: true if the resource should be included, or false if it should not
3275: be. If recursive is true, the map will be recursively examined,
3276: otherwise it will not be. If bailout is true, the function will return
3277: as soon as it finds a resource, if false it will finish. If showall is
3278: true it will not hide maps that contain nothing but one other map. The
3279: noblockcheck arg is propagated to become the sixth arg in the call to
3280: lonnet::allowed when checking a resource's availability during collection
3281: of resources using the iterator. noblockcheck needs to be true if
3282: retrieveResources() was called by a routine that itself was called by
3283: lonnet::allowed, in order to avoid recursion. By default the map
3284: is the top-level map of the course, filterFunc is a function that
3285: always returns 1, recursive is true, bailout is false, showall is
3286: false. The resources will be returned in a list containing the
3287: resource objects for the corresponding resources, with B<no structure
3288: information> in the list; regardless of branching, recursion, etc.,
3289: it will be a flat list.
3290:
3291: Thus, this is suitable for cases where you don't want the structure,
3292: just a list of all resources. It is also suitable for finding out how
3293: many resources match a given description; for this use, if all you
3294: want to know is if I<any> resources match the description, the bailout
3295: parameter will allow you to avoid potentially expensive enumeration of
3296: all matching resources.
3297:
3298: =item * B<hasResource>(map, filterFunc, recursive, showall):
3299:
3300: Convenience method for
3301:
3302: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
3303:
3304: which will tell whether the map has resources matching the description
3305: in the filter function.
3306:
3307: =item * B<usedVersion>(url):
3308:
3309: Retrieves version infomation for a url. Returns the version (a number, or
3310: the string "mostrecent") for resources which have version information in
3311: the big hash.
3312:
3313: =cut
3314:
3315:
3316: sub getResourceByUrl {
3317: my $self = shift;
3318: my $resUrl = shift;
3319: my $multiple = shift;
3320:
3321: if (ref($resUrl)) { return $resUrl; }
3322:
3323: $resUrl = &Apache::lonnet::clutter($resUrl);
3324: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
3325: if (!$resId) { return ''; }
3326: if ($multiple) {
3327: my @resources = ();
3328: my @resIds = split (/,/, $resId);
3329: foreach my $id (@resIds) {
3330: my $resourceId = $self->getById($id);
3331: if ($resourceId) {
3332: push(@resources,$resourceId);
3333: }
3334: }
3335: return @resources;
3336: } else {
3337: if ($resId =~ /,/) {
3338: $resId = (split (/,/, $resId))[0];
3339: }
3340: return $self->getById($resId);
3341: }
3342: }
3343:
3344: sub retrieveResources {
3345: my $self = shift;
3346: my $map = shift;
3347: my $filterFunc = shift;
3348: if (!defined ($filterFunc)) {
3349: $filterFunc = sub {return 1;};
3350: }
3351: my $recursive = shift;
3352: if (!defined($recursive)) { $recursive = 1; }
3353: my $bailout = shift;
3354: if (!defined($bailout)) { $bailout = 0; }
3355: my $showall = shift;
3356: my $noblockcheck = shift;
3357: # Create the necessary iterator.
3358: if (!ref($map)) { # assume it's a url of a map.
3359: $map = $self->getResourceByUrl($map);
3360: }
3361:
3362: # If nothing was passed, assume top-level map
3363: if (!$map) {
3364: $map = $self->getById('0.0');
3365: }
3366:
3367: # Check the map's validity.
3368: if (!$map->is_map()) {
3369: # Oh, to throw an exception.... how I'd love that!
3370: return ();
3371: }
3372:
3373: # Get an iterator.
3374: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
3375: undef, $recursive, $showall);
3376:
3377: my @resources = ();
3378:
3379: if (&$filterFunc($map)) {
3380: push(@resources, $map);
3381: }
3382:
3383: # Run down the iterator and collect the resources.
3384: my $curRes;
3385:
3386: while ($curRes = $it->next(undef,$noblockcheck)) {
3387: if (ref($curRes)) {
3388: if (!&$filterFunc($curRes)) {
3389: next;
3390: }
3391:
3392: push(@resources, $curRes);
3393:
3394: if ($bailout) {
3395: return @resources;
3396: }
3397: }
3398:
3399: }
3400:
3401: return @resources;
3402: }
3403:
3404: sub hasResource {
3405: my $self = shift;
3406: my $map = shift;
3407: my $filterFunc = shift;
3408: my $recursive = shift;
3409: my $showall = shift;
3410:
3411: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
3412: }
3413:
3414: sub usedVersion {
3415: my $self = shift;
3416: my $linkurl = shift;
3417: return $self->navhash("version_$linkurl");
3418: }
3419:
3420: 1;
3421:
3422: package Apache::lonnavmaps::iterator;
3423: use Scalar::Util qw(weaken);
3424: use Apache::lonnet;
3425:
3426: =pod
3427:
3428: =back
3429:
3430: =head1 Object: navmap Iterator
3431:
3432: An I<iterator> encapsulates the logic required to traverse a data
3433: structure. navmap uses an iterator to traverse the course map
3434: according to the criteria you wish to use.
3435:
3436: To obtain an iterator, call the B<getIterator>() function of a
3437: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
3438: directly.) This will return a reference to the iterator:
3439:
3440: C<my $resourceIterator = $navmap-E<gt>getIterator();>
3441:
3442: To get the next thing from the iterator, call B<next>:
3443:
3444: C<my $nextThing = $resourceIterator-E<gt>next()>
3445:
3446: getIterator behaves as follows:
3447:
3448: =over 4
3449:
3450: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap, $deeplinklisted):
3451:
3452: All parameters are optional. firstResource is a resource reference
3453: corresponding to where the iterator should start. It defaults to
3454: navmap->firstResource() for the corresponding nav map. finishResource
3455: corresponds to where you want the iterator to end, defaulting to
3456: navmap->finishResource(). filterHash is a hash used as a set
3457: containing strings representing the resource IDs, defaulting to
3458: empty. Condition is a 1 or 0 that sets what to do with the filter
3459: hash: If a 0, then only resources that exist IN the filterHash will be
3460: recursed on. If it is a 1, only resources NOT in the filterHash will
3461: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
3462: false (default), the iterator will only return the first level of map
3463: that is not just a single, 'redirecting' map. If true, the iterator
3464: will return all information, starting with the top-level map,
3465: regardless of content. returnTopMap, if true (default false), will
3466: cause the iterator to return the top-level map object (resource 0.0)
3467: before anything else. deeplinklisted if true (default false), will
3468: check "listed" status of a resource with a deeplink, and unless "absent"
3469: will exclude deeplink checking when retrieving the browsePriv from
3470: lonnet::allowed().
3471:
3472: Thus, by default, only top-level resources will be shown. Change the
3473: condition to a 1 without changing the hash, and all resources will be
3474: shown. Changing the condition to 1 and including some values in the
3475: hash will allow you to selectively suppress parts of the navmap, while
3476: leaving it on 0 and adding things to the hash will allow you to
3477: selectively add parts of the nav map. See the handler code for
3478: examples.
3479:
3480: The iterator will return either a reference to a resource object, or a
3481: token representing something in the map, such as the beginning of a
3482: new branch. The possible tokens are:
3483:
3484: =over 4
3485:
3486: =item * B<END_ITERATOR>:
3487:
3488: The iterator has returned all that it's going to. Further calls to the
3489: iterator will just produce more of these. This is a "false" value, and
3490: is the only false value the iterator which will be returned, so it can
3491: be used as a loop sentinel.
3492:
3493: =item * B<BEGIN_MAP>:
3494:
3495: A new map is being recursed into. This is returned I<after> the map
3496: resource itself is returned.
3497:
3498: =item * B<END_MAP>:
3499:
3500: The map is now done.
3501:
3502: =item * B<BEGIN_BRANCH>:
3503:
3504: A branch is now starting. The next resource returned will be the first
3505: in that branch.
3506:
3507: =item * B<END_BRANCH>:
3508:
3509: The branch is now done.
3510:
3511: =back
3512:
3513: The tokens are retreivable via methods on the iterator object, i.e.,
3514: $iterator->END_MAP.
3515:
3516: Maps can contain empty resources. The iterator will automatically skip
3517: over such resources, but will still treat the structure
3518: correctly. Thus, a complicated map with several branches, but
3519: consisting entirely of empty resources except for one beginning or
3520: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
3521: but only one resource will be returned.
3522:
3523: =back
3524:
3525: =head2 Normal Usage
3526:
3527: Normal usage of the iterator object is to do the following:
3528:
3529: my $it = $navmap->getIterator([your params here]);
3530: my $curRes;
3531: while ($curRes = $it->next()) {
3532: [your logic here]
3533: }
3534:
3535: Note that inside of the loop, it's frequently useful to check if
3536: "$curRes" is a reference or not with the reference function; only
3537: resource objects will be references, and any non-references will
3538: be the tokens described above.
3539:
3540: The next() routine can take two (optional) arguments:
3541: closeAllPages - if true will not recurse down a .page
3542: noblockcheck - passed to browsePriv() for passing as sixth arg to
3543: call to lonnet::allowed. This needs to be set if retrieveResources
3544: was already called from another routine called within lonnet::allowed,
3545: so as to prevent recursion.
3546:
3547: Also note there is some old code floating around that tries to track
3548: the depth of the iterator to see when it's done; do not copy that
3549: code. It is difficult to get right and harder to understand than
3550: this. They should be migrated to this new style.
3551:
3552: =cut
3553:
3554: # Here are the tokens for the iterator:
3555:
3556: sub END_ITERATOR { return 0; }
3557: sub BEGIN_MAP { return 1; } # begining of a new map
3558: sub END_MAP { return 2; } # end of the map
3559: sub BEGIN_BRANCH { return 3; } # beginning of a branch
3560: sub END_BRANCH { return 4; } # end of a branch
3561: sub FORWARD { return 1; } # go forward
3562: sub BACKWARD { return 2; }
3563:
3564: sub min {
3565: (my $a, my $b) = @_;
3566: if ($a < $b) { return $a; } else { return $b; }
3567: }
3568:
3569: sub new {
3570: # magic invocation to create a class instance
3571: my $proto = shift;
3572: my $class = ref($proto) || $proto;
3573: my $self = {};
3574:
3575: weaken($self->{NAV_MAP} = shift);
3576: return undef unless ($self->{NAV_MAP});
3577:
3578: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3579: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3580:
3581: # Handle the parameters
3582: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3583: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3584:
3585: # If the given resources are just the ID of the resource, get the
3586: # objects
3587: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3588: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3589: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3590: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3591:
3592: $self->{FILTER} = shift;
3593:
3594: # A hash, used as a set, of resource already seen
3595: $self->{ALREADY_SEEN} = shift;
3596: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
3597: $self->{CONDITION} = shift;
3598:
3599: # Do we want to automatically follow "redirection" maps?
3600: $self->{FORCE_TOP} = shift;
3601:
3602: # Do we want to return the top-level map object (resource 0.0)?
3603: $self->{RETURN_0} = shift;
3604: # have we done that yet?
3605: $self->{HAVE_RETURNED_0} = 0;
3606:
3607: # Do we want to check the "listed" status for a resource for which
3608: # deeplinking applies.
3609: $self->{DEEPLINKLISTED} = shift;
3610:
3611: # Now, we need to pre-process the map, by walking forward and backward
3612: # over the parts of the map we're going to look at.
3613:
3614: # The processing steps are exactly the same, except for a few small
3615: # changes, so I bundle those up in the following list of two elements:
3616: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
3617: # first_resource).
3618: # This prevents writing nearly-identical code twice.
3619: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
3620: 'FIRST_RESOURCE'],
3621: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
3622: 'FINISH_RESOURCE'] );
3623:
3624: my $maxDepth = 0; # tracks max depth
3625:
3626: # If there is only one resource in this map, and it's a map, we
3627: # want to remember that, so the user can ask for the first map
3628: # that isn't just a redirector.
3629: my $resource; my $resourceCount = 0;
3630:
3631: # Documentation on this algorithm can be found in the CVS repository at
3632: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
3633: # in that file.
3634: # **1**
3635:
3636: foreach my $pass (@iterations) {
3637: my $direction = $pass->[0];
3638: my $valName = $pass->[1];
3639: my $nextResourceMethod = $pass->[2];
3640: my $firstResourceName = $pass->[3];
3641:
3642: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
3643: $self->{FIRST_RESOURCE},
3644: $self->{FINISH_RESOURCE},
3645: {}, undef, 0, $direction);
3646:
3647: # prime the recursion
3648: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
3649: $iterator->next();
3650: my $curRes = $iterator->next();
3651: my $depth = 1;
3652: while ($depth > 0) {
3653: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
3654: if ($curRes == $iterator->END_MAP()) { $depth--; }
3655:
3656: if (ref($curRes)) {
3657: # If there's only one resource, this will save it
3658: # we have to filter empty resources from consideration here,
3659: # or even "empty", redirecting maps have two (start & finish)
3660: # or three (start, finish, plus redirector)
3661: if($direction == FORWARD && $curRes->src()) {
3662: $resource = $curRes; $resourceCount++;
3663: }
3664: my $resultingVal = $curRes->{DATA}->{$valName};
3665: my $nextResources = $curRes->$nextResourceMethod();
3666: my $nextCount = scalar(@{$nextResources});
3667:
3668: if ($nextCount == 1) { # **3**
3669: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
3670: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
3671: }
3672:
3673: if ($nextCount > 1) { # **4**
3674: foreach my $res (@{$nextResources}) {
3675: my $current = $res->{DATA}->{$valName} || 999999999;
3676: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
3677: }
3678: }
3679: }
3680:
3681: # Assign the final val (**2**)
3682: if (ref($curRes) && $direction == BACKWARD()) {
3683: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
3684: $curRes->{DATA}->{BOT_UP_VAL});
3685:
3686: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
3687: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
3688: }
3689:
3690: $curRes = $iterator->next();
3691: }
3692: }
3693:
3694: # Check: Was this only one resource, a map?
3695: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
3696: my $firstResource = $resource->map_start();
3697: my $finishResource = $resource->map_finish();
3698: return Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3699: $finishResource, $self->{FILTER},
3700: $self->{ALREADY_SEEN},
3701: $self->{CONDITION},
3702: $self->{FORCE_TOP},
3703: undef,$self->{DEEPLINKLISTED});
3704: }
3705:
3706: # Set up some bookkeeping information.
3707: $self->{CURRENT_DEPTH} = 0;
3708: $self->{MAX_DEPTH} = $maxDepth;
3709: $self->{STACK} = [];
3710: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3711: $self->{FINISHED} = 0; # When true, the iterator has finished
3712:
3713: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
3714: push @{$self->{STACK}}, [];
3715: }
3716:
3717: # Prime the recursion w/ the first resource **5**
3718: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
3719: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
3720:
3721: bless ($self);
3722: return $self;
3723: }
3724:
3725: sub next {
3726: my $self = shift;
3727: my $closeAllPages=shift;
3728: my $noblockcheck = shift;
3729: if ($self->{FINISHED}) {
3730: return END_ITERATOR();
3731: }
3732:
3733: # If we want to return the top-level map object, and haven't yet,
3734: # do so.
3735: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
3736: $self->{HAVE_RETURNED_0} = 1;
3737: my $nextTopLevel = $self->{NAV_MAP}->getById('0.0');
3738: return $self->{NAV_MAP}->getById('0.0');
3739: }
3740: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {
3741: $self->{HAVE_RETURNED_0_BEGIN_MAP} = 1;
3742: return $self->BEGIN_MAP();
3743: }
3744:
3745: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3746: # grab the next from the recursive iterator
3747: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
3748:
3749: # is it a begin or end map? If so, update the depth
3750: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3751: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3752:
3753: # Are we back at depth 0? If so, stop recursing
3754: if ($self->{RECURSIVE_DEPTH} == 0) {
3755: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3756: }
3757: return $next;
3758: }
3759:
3760: if (defined($self->{FORCE_NEXT})) {
3761: my $tmp = $self->{FORCE_NEXT};
3762: $self->{FORCE_NEXT} = undef;
3763: return $tmp;
3764: }
3765:
3766: # Have we not yet begun? If not, return BEGIN_MAP and
3767: # remember we've started.
3768: if ( !$self->{STARTED} ) {
3769: $self->{STARTED} = 1;
3770: return $self->BEGIN_MAP();
3771: }
3772:
3773: # Here's the guts of the iterator.
3774:
3775: # Find the next resource, if any.
3776: my $found = 0;
3777: my $i = $self->{MAX_DEPTH};
3778: my $newDepth;
3779: my $here;
3780: while ( $i >= 0 && !$found ) {
3781: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
3782: $here = pop @{$self->{STACK}->[$i]}; # **7**
3783: $found = 1;
3784: $newDepth = $i;
3785: }
3786: $i--;
3787: }
3788:
3789: # If we still didn't find anything, we're done.
3790: if ( !$found ) {
3791: # We need to get back down to the correct branch depth
3792: if ( $self->{CURRENT_DEPTH} > 0 ) {
3793: $self->{CURRENT_DEPTH}--;
3794: return END_BRANCH();
3795: } else {
3796: $self->{FINISHED} = 1;
3797: return END_MAP();
3798: }
3799: }
3800:
3801: # If this is not a resource, it must be an END_BRANCH marker we want
3802: # to return directly.
3803: if (!ref($here)) { # **8**
3804: if ($here == END_BRANCH()) { # paranoia, in case of later extension
3805: $self->{CURRENT_DEPTH}--;
3806: return $here;
3807: }
3808: }
3809:
3810: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
3811: $self->{HERE} = $here;
3812:
3813: # Get to the right level
3814: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
3815: push @{$self->{STACK}->[$newDepth]}, $here;
3816: $self->{CURRENT_DEPTH}--;
3817: return END_BRANCH();
3818: }
3819: if ( $self->{CURRENT_DEPTH} < $newDepth) {
3820: push @{$self->{STACK}->[$newDepth]}, $here;
3821: $self->{CURRENT_DEPTH}++;
3822: return BEGIN_BRANCH();
3823: }
3824:
3825: # If we made it here, we have the next resource, and we're at the
3826: # right branch level. So let's examine the resource for where
3827: # we can get to from here.
3828:
3829: # So we need to look at all the resources we can get to from here,
3830: # categorize them if we haven't seen them, remember if we have a new
3831: my $nextUnfiltered = $here->getNext();
3832:
3833:
3834: my $maxDepthAdded = -1;
3835:
3836: for (@$nextUnfiltered) {
3837: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
3838: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3839: push @{$self->{STACK}->[$depth]}, $_;
3840: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
3841: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
3842: }
3843: }
3844:
3845: # Is this the end of a branch? If so, all of the resources examined above
3846: # led to lower levels than the one we are currently at, so we push a END_BRANCH
3847: # marker onto the stack so we don't forget.
3848: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3849: # BC branch and gets to C, it will see F as the only next resource, but it's
3850: # one level lower. Thus, this is the end of the branch, since there are no
3851: # more resources added to this level or above.
3852: # We don't do this if the examined resource is the finish resource,
3853: # because the condition given above is true, but the "END_MAP" will
3854: # take care of things and we should already be at depth 0.
3855: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
3856: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
3857: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3858: }
3859:
3860: # That ends the main iterator logic. Now, do we want to recurse
3861: # down this map (if this resource is a map)?
3862: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
3863: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION}) &&
3864: ($env{'request.role.adv'} || !$self->{HERE}->randomout())) {
3865: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3866: my $firstResource = $self->{HERE}->map_start();
3867: my $finishResource = $self->{HERE}->map_finish();
3868: $self->{RECURSIVE_ITERATOR} =
3869: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3870: $finishResource, $self->{FILTER},
3871: $self->{ALREADY_SEEN},
3872: $self->{CONDITION},
3873: $self->{FORCE_TOP},
3874: undef,$self->{DEEPLINKLISTED});
3875: }
3876:
3877: # If this is a blank resource, don't actually return it.
3878: # Should you ever find you need it, make sure to add an option to the code
3879: # that you can use; other things depend on this behavior.
3880: my $browsePriv = $self->{HERE}->browsePriv($noblockcheck,$self->{DEEPLINKLISTED});
3881: if (!$self->{HERE}->src() ||
3882: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
3883: return $self->next($closeAllPages);
3884: }
3885:
3886: return $self->{HERE};
3887:
3888: }
3889:
3890: =pod
3891:
3892: The other method available on the iterator is B<getStack>, which
3893: returns an array populated with the current 'stack' of maps, as
3894: references to the resource objects. Example: This is useful when
3895: making the navigation map, as we need to check whether we are under a
3896: page map to see if we need to link directly to the resource, or to the
3897: page. The first elements in the array will correspond to the top of
3898: the stack (most inclusive map).
3899:
3900: =cut
3901:
3902: sub getStack {
3903: my $self=shift;
3904:
3905: my @stack;
3906:
3907: $self->populateStack(\@stack);
3908:
3909: return \@stack;
3910: }
3911:
3912: # Private method: Calls the iterators recursively to populate the stack.
3913: sub populateStack {
3914: my $self=shift;
3915: my $stack = shift;
3916:
3917: push @$stack, $self->{HERE} if ($self->{HERE});
3918:
3919: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3920: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3921: }
3922: }
3923:
3924: 1;
3925:
3926: package Apache::lonnavmaps::DFSiterator;
3927: use Scalar::Util qw(weaken);
3928: use Apache::lonnet;
3929:
3930: # Not documented in the perldoc: This is a simple iterator that just walks
3931: # through the nav map and presents the resources in a depth-first search
3932: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3933: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3934: # useful for pre-processing of some kind, and is in fact used by the main
3935: # iterator that way, but that's about it.
3936: # One could imagine merging this into the init routine of the main iterator,
3937: # but this might as well be left separate, since it is possible some other
3938: # use might be found for it. - Jeremy
3939:
3940: # Unlike the main iterator, this DOES return all resources, even blank ones.
3941: # The main iterator needs them to correctly preprocess the map.
3942:
3943: sub BEGIN_MAP { return 1; } # begining of a new map
3944: sub END_MAP { return 2; } # end of the map
3945: sub FORWARD { return 1; } # go forward
3946: sub BACKWARD { return 2; }
3947:
3948: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3949: # filter hash ref (or undef), already seen hash or undef, condition
3950: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
3951: sub new {
3952: # magic invocation to create a class instance
3953: my $proto = shift;
3954: my $class = ref($proto) || $proto;
3955: my $self = {};
3956:
3957: weaken($self->{NAV_MAP} = shift);
3958: return undef unless ($self->{NAV_MAP});
3959:
3960: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3961: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3962:
3963: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3964: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3965:
3966: # If the given resources are just the ID of the resource, get the
3967: # objects
3968: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3969: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3970: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3971: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3972:
3973: $self->{FILTER} = shift;
3974:
3975: # A hash, used as a set, of resource already seen
3976: $self->{ALREADY_SEEN} = shift;
3977: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
3978: $self->{CONDITION} = shift;
3979: $self->{DIRECTION} = shift || FORWARD();
3980:
3981: # Flag: Have we started yet?
3982: $self->{STARTED} = 0;
3983:
3984: # Should we continue calling the recursive iterator, if any?
3985: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3986: # The recursive iterator, if any
3987: $self->{RECURSIVE_ITERATOR} = undef;
3988: # Are we recursing on a map, or a branch?
3989: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3990: # And the count of how deep it is, so that this iterator can keep track of
3991: # when to pick back up again.
3992: $self->{RECURSIVE_DEPTH} = 0;
3993:
3994: # For keeping track of our branches, we maintain our own stack
3995: $self->{STACK} = [];
3996:
3997: # Start with the first resource
3998: if ($self->{DIRECTION} == FORWARD) {
3999: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
4000: } else {
4001: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
4002: }
4003:
4004: bless($self);
4005: return $self;
4006: }
4007:
4008: sub next {
4009: my $self = shift;
4010:
4011: # Are we using a recursive iterator? If so, pull from that and
4012: # watch the depth; we want to resume our level at the correct time.
4013: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
4014: # grab the next from the recursive iterator
4015: my $next = $self->{RECURSIVE_ITERATOR}->next();
4016:
4017: # is it a begin or end map? Update depth if so
4018: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
4019: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
4020:
4021: # Are we back at depth 0? If so, stop recursing.
4022: if ($self->{RECURSIVE_DEPTH} == 0) {
4023: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
4024: }
4025:
4026: return $next;
4027: }
4028:
4029: # Is there a current resource to grab? If not, then return
4030: # END_MAP, which will end the iterator.
4031: if (scalar(@{$self->{STACK}}) == 0) {
4032: return $self->END_MAP();
4033: }
4034:
4035: # Have we not yet begun? If not, return BEGIN_MAP and
4036: # remember that we've started.
4037: if ( !$self->{STARTED} ) {
4038: $self->{STARTED} = 1;
4039: return $self->BEGIN_MAP;
4040: }
4041:
4042: # Get the next resource in the branch
4043: $self->{HERE} = pop @{$self->{STACK}};
4044:
4045: # remember that we've seen this, so we don't return it again later
4046: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
4047:
4048: # Get the next possible resources
4049: my $nextUnfiltered;
4050: if ($self->{DIRECTION} == FORWARD()) {
4051: $nextUnfiltered = $self->{HERE}->getNext();
4052: } else {
4053: $nextUnfiltered = $self->{HERE}->getPrevious();
4054: }
4055: my $next = [];
4056:
4057: # filter the next possibilities to remove things we've
4058: # already seen.
4059: foreach my $item (@$nextUnfiltered) {
4060: if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
4061: push @$next, $item;
4062: }
4063: }
4064:
4065: while (@$next) {
4066: # copy the next possibilities over to the stack
4067: push @{$self->{STACK}}, shift @$next;
4068: }
4069:
4070: # If this is a map and we want to recurse down it... (not filtered out)
4071: if ($self->{HERE}->is_map() &&
4072: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
4073: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
4074: my $firstResource = $self->{HERE}->map_start();
4075: my $finishResource = $self->{HERE}->map_finish();
4076:
4077: $self->{RECURSIVE_ITERATOR} =
4078: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
4079: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
4080: $self->{CONDITION}, $self->{DIRECTION});
4081: }
4082:
4083: return $self->{HERE};
4084: }
4085:
4086: # Identical to the full iterator methods of the same name. Hate to copy/paste
4087: # but I also hate to "inherit" either iterator from the other.
4088:
4089: sub getStack {
4090: my $self=shift;
4091:
4092: my @stack;
4093:
4094: $self->populateStack(\@stack);
4095:
4096: return \@stack;
4097: }
4098:
4099: # Private method: Calls the iterators recursively to populate the stack.
4100: sub populateStack {
4101: my $self=shift;
4102: my $stack = shift;
4103:
4104: push @$stack, $self->{HERE} if ($self->{HERE});
4105:
4106: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
4107: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
4108: }
4109: }
4110:
4111: 1;
4112:
4113: package Apache::lonnavmaps::resource;
4114: use Scalar::Util qw(weaken);
4115: use Apache::lonnet;
4116:
4117: =pod
4118:
4119: =head1 Object: resource
4120:
4121: X<resource, navmap object>
4122: A resource object encapsulates a resource in a resource map, allowing
4123: easy manipulation of the resource, querying the properties of the
4124: resource (including user properties), and represents a reference that
4125: can be used as the canonical representation of the resource by
4126: lonnavmap clients like renderers.
4127:
4128: A resource only makes sense in the context of a navmap, as some of the
4129: data is stored in the navmap object.
4130:
4131: You will probably never need to instantiate this object directly. Use
4132: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
4133: starting resource.
4134:
4135: Resource objects respect the parameter_hiddenparts, which suppresses
4136: various parts according to the wishes of the map author. As of this
4137: writing, there is no way to override this parameter, and suppressed
4138: parts will never be returned, nor will their response types or ids be
4139: stored.
4140:
4141: =head2 Overview
4142:
4143: A B<Resource> is the most granular type of object in LON-CAPA that can
4144: be included in a course. It can either be a particular resource, like
4145: an HTML page, external resource, problem, etc., or it can be a
4146: container sequence, such as a "page" or a "map".
4147:
4148: To see a sequence from the user's point of view, please see the
4149: B<Creating a Course: Maps and Sequences> chapter of the Author's
4150: Manual.
4151:
4152: A Resource Object, once obtained from a navmap object via a B<getBy*>
4153: method of the navmap, or from an iterator, allows you to query
4154: information about that resource.
4155:
4156: Generally, you do not ever want to create a resource object yourself,
4157: so creation has been left undocumented. Always retrieve resources
4158: from navmap objects.
4159:
4160: =head3 Identifying Resources
4161:
4162: X<big hash>Every resource is identified by a Resource ID in the big hash that is
4163: unique to that resource for a given course. X<resource ID, in big hash>
4164: The Resource ID has the form #.#, where the first number is the same
4165: for every resource in a map, and the second is unique. For instance,
4166: for a course laid out like this:
4167:
4168: * Problem 1
4169: * Map
4170: * Resource 2
4171: * Resource 3
4172:
4173: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
4174: C<Resource 3> will share a first number. The second number may end up
4175: re-used between the two groups.
4176:
4177: The resource ID is only used in the big hash, but can be used in the
4178: context of a course to identify a resource easily. (For instance, the
4179: printing system uses it to record which resources from a sequence you
4180: wish to print.)
4181:
4182: X<symb> X<resource, symb>
4183: All resources also have B<symb>s, which uniquely identify a resource
4184: in a course. Many internal LON-CAPA functions expect a symb. A symb
4185: carries along with it the URL of the resource, and the map it appears
4186: in. Symbs are much larger than resource IDs.
4187:
4188: =cut
4189:
4190: sub new {
4191: # magic invocation to create a class instance
4192: my $proto = shift;
4193: my $class = ref($proto) || $proto;
4194: my $self = {};
4195:
4196: weaken($self->{NAV_MAP} = shift);
4197: $self->{ID} = shift;
4198:
4199: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
4200: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
4201:
4202: # Store this new resource in the parent nav map's cache.
4203: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
4204: $self->{RESOURCE_ERROR} = 0;
4205:
4206: $self->{DUEDATE_CACHE} = undef;
4207:
4208: # A hash that can be used by two-pass algorithms to store data
4209: # about this resource in. Not used by the resource object
4210: # directly.
4211: $self->{DATA} = {};
4212:
4213: bless($self);
4214:
4215: # This is a speed optimization, to avoid calling symb() too often.
4216: $self->{SYMB} = $self->symb();
4217:
4218: return $self;
4219: }
4220:
4221: # private function: simplify the NAV_HASH lookups we keep doing
4222: # pass the name, and to automatically append my ID, pass a true val on the
4223: # second param
4224: sub navHash {
4225: my $self = shift;
4226: my $param = shift;
4227: my $id = shift;
4228: my $arg = $param . ($id?$self->{ID}:"");
4229: if (ref($self) && ref($self->{NAV_MAP}) && defined($arg)) {
4230: return $self->{NAV_MAP}->navhash($arg);
4231: }
4232: return;
4233: }
4234:
4235: =pod
4236:
4237: =head2 Methods
4238:
4239: Once you have a resource object, here's what you can do with it:
4240:
4241: =head3 Attribute Retrieval
4242:
4243: Every resource has certain attributes that can be retrieved and used:
4244:
4245: =over 4
4246:
4247: =item * B<ID>: Every resource has an ID that is unique for that
4248: resource in the course it is in. The ID is actually in the hash
4249: representing the resource, so for a resource object $res, obtain
4250: it via C<$res->{ID}).
4251:
4252: =item * B<compTitle>:
4253:
4254: Returns a "composite title", that is equal to $res->title() if the
4255: resource has a title, and is otherwise the last part of the URL (e.g.,
4256: "problem.problem").
4257:
4258: =item * B<ext>:
4259:
4260: Returns true if the resource is external.
4261:
4262: =item * B<kind>:
4263:
4264: Returns the kind of the resource from the compiled nav map.
4265:
4266: =item * B<randomout>:
4267:
4268: Returns true if this resource was chosen to NOT be shown to the user
4269: by the random map selection feature. In other words, this is usually
4270: false.
4271:
4272: =item * B<randompick>:
4273:
4274: Returns the number of randomly picked items for a map if the randompick
4275: feature is being used on the map.
4276:
4277: =item * B<randomorder>:
4278:
4279: Returns true for a map if the randomorder feature is being used on the
4280: map.
4281:
4282: =item * B<src>:
4283:
4284: Returns the source for the resource.
4285:
4286: =item * B<symb>:
4287:
4288: Returns the symb for the resource.
4289:
4290: =item * B<title>:
4291:
4292: Returns the title of the resource.
4293:
4294: =back
4295:
4296: =cut
4297:
4298: # These info functions can be used directly, as they don't return
4299: # resource information.
4300: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
4301: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
4302: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
4303: sub from { my $self=shift; return $self->navHash("from_", 1); }
4304: # considered private and undocumented
4305: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
4306: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
4307: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
4308: sub deeplinkout { my $self=shift; return $self->navHash("deeplinkout_", 1); }
4309: sub randompick {
4310: my $self = shift;
4311: my $randompick = $self->parmval('randompick');
4312: return $randompick;
4313: }
4314: sub randomorder {
4315: my $self = shift;
4316: my $randomorder = $self->parmval('randomorder');
4317: return ($randomorder =~ /^yes$/i);
4318: }
4319: sub link {
4320: my $self=shift;
4321: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
4322: return $self->src;
4323: }
4324: sub src {
4325: my $self=shift;
4326: return $self->navHash("src_", 1);
4327: }
4328: sub shown_symb {
4329: my $self=shift;
4330: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->{SYMB});}
4331: return $self->{SYMB};
4332: }
4333: sub id {
4334: my $self=shift;
4335: return $self->{ID};
4336: }
4337: sub enclosing_map_src {
4338: my $self=shift;
4339: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4340: return $self->navHash('map_id_'.$first);
4341: }
4342: sub symb {
4343: my $self=shift;
4344: if (defined($self->{SYMB})) { return $self->{SYMB}; }
4345: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4346: my $symbSrc = &Apache::lonnet::declutter($self->src());
4347: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
4348: . '___' . $second . '___' . $symbSrc;
4349: return &Apache::lonnet::symbclean($symb);
4350: }
4351: sub wrap_symb {
4352: my $self = shift;
4353: return $self->{NAV_MAP}->wrap_symb($self->{SYMB});
4354: }
4355: sub title {
4356: my $self=shift;
4357: if ($self->{ID} eq '0.0') {
4358: # If this is the top-level map, return the title of the course
4359: # since this map can not be titled otherwise.
4360: return $env{'course.'.$env{'request.course.id'}.'.description'};
4361: }
4362: return $self->navHash("title_", 1); }
4363: # considered private and undocumented
4364: sub to { my $self=shift; return $self->navHash("to_", 1); }
4365: sub condition {
4366: my $self=shift;
4367: my $undercond=$self->navHash("undercond_", 1);
4368: if (!defined($undercond)) { return 1; };
4369: my $condid=$self->navHash("condid_$undercond");
4370: if (!defined($condid)) { return 1; };
4371: my $condition=&Apache::lonnet::directcondval($condid);
4372: return $condition;
4373: }
4374: sub condval {
4375: my $self=shift;
4376: my ($pathname,$filename) =
4377: &Apache::lonnet::split_uri_for_cond($self->src());
4378:
4379: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4380: /\&\Q$filename\E\:([\d\|]+)\&/);
4381: if ($match) {
4382: return &Apache::lonnet::condval($1);
4383: }
4384: return 0;
4385: }
4386: sub compTitle {
4387: my $self = shift;
4388: my $title = $self->title();
4389: $title=~s/\&colon\;/\:/gs;
4390: if (!$title) {
4391: $title = $self->src();
4392: $title = substr($title, rindex($title, '/') + 1);
4393: }
4394: return $title;
4395: }
4396:
4397: =pod
4398:
4399: B<Predicate Testing the Resource>
4400:
4401: These methods are shortcuts to deciding if a given resource has a given property.
4402:
4403: =over 4
4404:
4405: =item * B<is_map>:
4406:
4407: Returns true if the resource is a map type.
4408:
4409: =item * B<is_problem>:
4410:
4411: Returns true if the resource is a problem type, false
4412: otherwise. (Looks at the extension on the src field; might need more
4413: to work correctly.)
4414:
4415: =item * B<is_page>:
4416:
4417: Returns true if the resource is a page.
4418:
4419: =item * B<is_sequence>:
4420:
4421: Returns true if the resource is a sequence.
4422:
4423: =back
4424:
4425: =cut
4426:
4427: sub hasResource {
4428: my $self = shift;
4429: return $self->{NAV_MAP}->hasResource(@_);
4430: }
4431:
4432: sub retrieveResources {
4433: my $self = shift;
4434: return $self->{NAV_MAP}->retrieveResources(@_);
4435: }
4436:
4437: sub is_exam {
4438: my ($self,$part) = @_;
4439: my $type = $self->parmval('type',$part);
4440: if ($type eq 'exam') {
4441: return 1;
4442: }
4443: if ($self->src() =~ /\.(exam)$/) {
4444: return 1;
4445: }
4446: return 0;
4447: }
4448: sub is_html {
4449: my $self=shift;
4450: my $src = $self->src();
4451: return ($src =~ /html$/);
4452: }
4453: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
4454: sub is_page {
4455: my $self=shift;
4456: my $src = $self->src();
4457: return $self->navHash("is_map_", 1) &&
4458: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
4459: }
4460: sub is_practice {
4461: my $self=shift;
4462: my ($part) = @_;
4463: my $type = $self->parmval('type',$part);
4464: if ($type eq 'practice') {
4465: return 1;
4466: }
4467: return 0;
4468: }
4469: sub is_problem {
4470: my $self=shift;
4471: my $src = $self->src();
4472: if ($src =~ /$LONCAPA::assess_re/) {
4473: return !($self->is_practice());
4474: }
4475: return 0;
4476: }
4477: #
4478: # The has below is the set of status that are considered 'incomplete'
4479: #
4480: my %incomplete_hash =
4481: (
4482: TRIES_LEFT() => 1,
4483: OPEN() => 1,
4484: ATTEMPTED() => 1
4485:
4486: );
4487: #
4488: # Return tru if a problem is incomplete... for now incomplete means that
4489: # any part of the problem is incomplete.
4490: # Note that if the resources is not a problem, 0 is returned.
4491: #
4492: sub is_incomplete {
4493: my $self = shift;
4494: if ($self->is_problem()) {
4495: foreach my $part (@{$self->parts()}) {
4496: if (exists($incomplete_hash{$self->status($part)})) {
4497: return 1;
4498: }
4499: }
4500: }
4501: return 0;
4502:
4503: }
4504: sub is_raw_problem {
4505: my $self=shift;
4506: my $src = $self->src();
4507: if ($src =~ /$LONCAPA::assess_re/) {
4508: return 1;
4509: }
4510: return 0;
4511: }
4512:
4513: sub contains_problem {
4514: my $self=shift;
4515: if ($self->is_page()) {
4516: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
4517: return $hasProblem;
4518: }
4519: return 0;
4520: }
4521: sub map_contains_problem {
4522: my $self=shift;
4523: if ($self->is_map()) {
4524: my $has_problem=
4525: $self->hasResource($self,sub { $_[0]->is_problem() },1);
4526: return $has_problem;
4527: }
4528: return 0;
4529: }
4530: sub is_sequence {
4531: my $self=shift;
4532: return $self->navHash("is_map_", 1) &&
4533: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
4534: }
4535: sub is_survey {
4536: my $self = shift();
4537: my $part = shift();
4538: my $type = $self->parmval('type',$part);
4539: if (($type eq 'survey') || ($type eq 'surveycred')) {
4540: return 1;
4541: }
4542: if ($self->src() =~ /\.(survey)$/) {
4543: return 1;
4544: }
4545: return 0;
4546: }
4547: sub is_anonsurvey {
4548: my $self = shift();
4549: my $part = shift();
4550: my $type = $self->parmval('type',$part);
4551: if (($type eq 'anonsurvey') || ($type eq 'anonsurveycred')) {
4552: return 1;
4553: }
4554: return 0;
4555: }
4556: sub is_task {
4557: my $self=shift;
4558: my $src = $self->src();
4559: return ($src =~ /\.(task)$/)
4560: }
4561:
4562: sub is_empty_sequence {
4563: my $self=shift;
4564: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
4565: }
4566:
4567: # Private method: Shells out to the parmval in the nav map, handler parts.
4568: sub parmval {
4569: my $self = shift;
4570: my $what = shift;
4571: my $part = shift;
4572: if (!defined($part)) {
4573: $part = '0';
4574: }
4575: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->{SYMB});
4576: }
4577:
4578: =pod
4579:
4580: B<Map Methods>
4581:
4582: These methods are useful for getting information about the map
4583: properties of the resource, if the resource is a map (B<is_map>).
4584:
4585: =over 4
4586:
4587: =item * B<map_finish>:
4588:
4589: Returns a reference to a resource object corresponding to the finish
4590: resource of the map.
4591:
4592: =item * B<map_pc>:
4593:
4594: Returns the pc value of the map, which is the first number that
4595: appears in the resource ID of the resources in the map, and is the
4596: number that appears around the middle of the symbs of the resources in
4597: that map.
4598:
4599: =item * B<map_start>:
4600:
4601: Returns a reference to a resource object corresponding to the start
4602: resource of the map.
4603:
4604: =item * B<map_type>:
4605:
4606: Returns a string with the type of the map in it.
4607:
4608: =item * B<map_hierarchy>:
4609:
4610: Returns a string with a comma-separated ordered list of map_pc IDs
4611: for the hierarchy of maps containing a map, with the top level
4612: map first, then descending to deeper levels, with the enclosing map last.
4613:
4614: =item * B<map_breadcrumbs>:
4615:
4616: Same as map_hierarchy, except maps containing only a single itemm if
4617: it's a map, or containing no items are omitted, unless it's the top
4618: level map (map_pc = 1), which is always included.
4619:
4620: =back
4621:
4622: =cut
4623:
4624: sub map_finish {
4625: my $self = shift;
4626: my $src = $self->src();
4627: $src = &Apache::lonnet::clutter($src);
4628: my $res = $self->navHash("map_finish_$src", 0);
4629: $res = $self->{NAV_MAP}->getById($res);
4630: return $res;
4631: }
4632: sub map_pc {
4633: my $self = shift;
4634: my $src = $self->src();
4635: return $self->navHash("map_pc_$src", 0);
4636: }
4637: sub map_start {
4638: my $self = shift;
4639: my $src = $self->src();
4640: $src = &Apache::lonnet::clutter($src);
4641: my $res = $self->navHash("map_start_$src", 0);
4642: $res = $self->{NAV_MAP}->getById($res);
4643: return $res;
4644: }
4645: sub map_type {
4646: my $self = shift;
4647: my $pc = $self->map_pc();
4648: return $self->navHash("map_type_$pc", 0);
4649: }
4650: sub map_hierarchy {
4651: my $self = shift;
4652: my $pc = $self->map_pc();
4653: return $self->navHash("map_hierarchy_$pc", 0);
4654: }
4655: sub map_breadcrumbs {
4656: my $self = shift;
4657: my $pc = $self->map_pc();
4658: return $self->navHash("map_breadcrumbs_$pc", 0);
4659: }
4660:
4661: #####
4662: # Property queries
4663: #####
4664:
4665: # These functions will be responsible for returning the CORRECT
4666: # VALUE for the parameter, no matter what. So while they may look
4667: # like direct calls to parmval, they can be more than that.
4668: # So, for instance, the duedate function should use the "duedatetype"
4669: # information, rather than the resource object user.
4670:
4671: =pod
4672:
4673: =head2 Resource Parameters
4674:
4675: In order to use the resource parameters correctly, the nav map must
4676: have been instantiated with genCourseAndUserOptions set to true, so
4677: the courseopt and useropt is read correctly. Then, you can call these
4678: functions to get the relevant parameters for the resource. Each
4679: function defaults to part "0", but can be directed to another part by
4680: passing the part as the parameter.
4681:
4682: These methods are responsible for getting the parameter correct, not
4683: merely reflecting the contents of the GDBM hashes. As we move towards
4684: dates relative to other dates, these methods should be updated to
4685: reflect that. (Then, anybody using these methods will not have to update
4686: their code.)
4687:
4688: =over 4
4689:
4690:
4691: =item * B<printable>
4692:
4693: returns true if the current date is such that the
4694: specified resource part is printable.
4695:
4696:
4697: =item * B<resprintable>
4698:
4699: Returns true if all parts in the resource are printable making the
4700: entire resource printable.
4701:
4702: =item * B<acc>
4703:
4704: Get the Client IP/Name Access Control information.
4705:
4706: =item * B<answerdate>:
4707:
4708: Get the answer-reveal date for the problem.
4709:
4710: =item * B<awarded>:
4711:
4712: Gets the awarded value for the problem part. Requires genUserData set to
4713: true when the navmap object was created.
4714:
4715: =item * B<duedate>:
4716:
4717: Get the due date for the problem.
4718:
4719: =item * B<tries>:
4720:
4721: Get the number of tries the student has used on the problem.
4722:
4723: =item * B<maxtries>:
4724:
4725: Get the number of max tries allowed.
4726:
4727: =item * B<opendate>:
4728:
4729: Get the open date for the problem.
4730:
4731: =item * B<sig>:
4732:
4733: Get the significant figures setting.
4734:
4735: =item * B<tol>:
4736:
4737: Get the tolerance for the problem.
4738:
4739: =item * B<tries>:
4740:
4741: Get the number of tries the user has already used on the problem.
4742:
4743: =item * B<type>:
4744:
4745: Get the question type for the problem.
4746:
4747: =item * B<weight>:
4748:
4749: Get the weight for the problem.
4750:
4751: =back
4752:
4753: =cut
4754:
4755:
4756:
4757:
4758: sub printable {
4759:
4760: my ($self, $part) = @_;
4761:
4762: # The following cases apply:
4763: # - If a start date is not set, it is replaced by the open date.
4764: # - Ditto for start/open replaced by content open.
4765: # - If neither start nor printdates are set the part is printable.
4766: # - Start date set but no end date: Printable if now >= start date.
4767: # - End date set but no start date: Printable if now <= end date.
4768: # - both defined: printable if start <= now <= end
4769: #
4770:
4771: # Get the print open/close dates for the resource.
4772:
4773: my $start = $self->parmval("printstartdate", $part);
4774: my $end = $self->parmval("printenddate", $part);
4775:
4776: if (!$start) {
4777: $start = $self->parmval("opendate", $part);
4778: }
4779: if (!$start) {
4780: $start = $self->parmval("contentopen", $part);
4781: }
4782:
4783:
4784: my $now = time();
4785:
4786:
4787: my $startok = 1;
4788: my $endok = 1;
4789:
4790: if ((defined $start) && ($start ne '')) {
4791: $startok = $start <= $now;
4792: }
4793: if ((defined $end) && ($end != '')) {
4794: $endok = $end >= $now;
4795: }
4796: return $startok && $endok;
4797: }
4798:
4799: sub resprintable {
4800: my $self = shift;
4801:
4802: # get parts...or realize there are no parts.
4803:
4804: my $partsref = $self->parts();
4805: my @parts = @$partsref;
4806:
4807: if (!@parts) {
4808: return $self->printable(0);
4809: } else {
4810: foreach my $part (@parts) {
4811: if (!$self->printable($part)) {
4812: return 0;
4813: }
4814: }
4815: return 1;
4816: }
4817: }
4818:
4819: sub acc {
4820: (my $self, my $part) = @_;
4821: my $acc = $self->parmval("acc", $part);
4822: return $acc;
4823: }
4824: sub answerdate {
4825: (my $self, my $part) = @_;
4826: # Handle intervals
4827: my $answerdatetype = $self->parmval("answerdate.type", $part);
4828: my $answerdate = $self->parmval("answerdate", $part);
4829: my $duedate = $self->parmval("duedate", $part);
4830: if ($answerdatetype eq 'date_interval') {
4831: $answerdate = $duedate + $answerdate;
4832: }
4833: return $answerdate;
4834: }
4835: sub awarded {
4836: my $self = shift; my $part = shift;
4837: $self->{NAV_MAP}->get_user_data();
4838: if (!defined($part)) { $part = '0'; }
4839: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.awarded'};
4840: }
4841: sub taskversion {
4842: my $self = shift; my $part = shift;
4843: $self->{NAV_MAP}->get_user_data();
4844: if (!defined($part)) { $part = '0'; }
4845: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.version'};
4846: }
4847: sub taskstatus {
4848: my $self = shift; my $part = shift;
4849: $self->{NAV_MAP}->get_user_data();
4850: if (!defined($part)) { $part = '0'; }
4851: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$self->taskversion($part).'.'.$part.'.status'};
4852: }
4853: sub solved {
4854: my $self = shift; my $part = shift;
4855: $self->{NAV_MAP}->get_user_data();
4856: if (!defined($part)) { $part = '0'; }
4857: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.solved'};
4858: }
4859: sub checkedin {
4860: my $self = shift; my $part = shift;
4861: $self->{NAV_MAP}->get_user_data();
4862: if (!defined($part)) { $part = '0'; }
4863: if ($self->is_task()) {
4864: my $version = $self->taskversion($part);
4865: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin.slot'});
4866: } else {
4867: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin.slot'});
4868: }
4869: }
4870: # this should work exactly like the copy in lonhomework.pm
4871: # Why is there a copy in lonhomework? Why not centralized?
4872: #
4873: # TODO: Centralize duedate.
4874: #
4875:
4876: sub duedate {
4877: (my $self, my $part) = @_;
4878: if (defined ($self->{DUEDATE_CACHE}->{$part})) {
4879: return $self->{DUEDATE_CACHE}->{$part};
4880: }
4881: my $date;
4882: my @interval=$self->parmval("interval", $part);
4883: my $due_date=$self->parmval("duedate", $part);
4884: if ($interval[0] =~ /(\d+)/) {
4885: my $timelimit = $1;
4886: my $first_access=&Apache::lonnet::get_first_access($interval[1],
4887: $self->{SYMB});
4888: if (defined($first_access)) {
4889: my $interval = $first_access+$timelimit;
4890: $date = (!$due_date || $interval < $due_date) ? $interval
4891: : $due_date;
4892: } else {
4893: $date = $due_date;
4894: }
4895: } else {
4896: $date = $due_date;
4897: }
4898: $self->{DUEDATE_CACHE}->{$part} = $date;
4899: return $date;
4900: }
4901: sub handgrade {
4902: (my $self, my $part) = @_;
4903: my @response_ids = $self->responseIds($part);
4904: if (@response_ids) {
4905: foreach my $response_id (@response_ids) {
4906: my $handgrade = $self->parmval("handgrade",$part.'_'.$response_id);
4907: if (lc($handgrade) eq 'yes') {
4908: return 'yes';
4909: }
4910: }
4911: }
4912: my $handgrade = $self->parmval("handgrade", $part);
4913: return $handgrade;
4914: }
4915: sub maxtries {
4916: (my $self, my $part) = @_;
4917: my $maxtries = $self->parmval("maxtries", $part);
4918: return $maxtries;
4919: }
4920: sub opendate {
4921: (my $self, my $part) = @_;
4922: my $opendatetype = $self->parmval("opendate.type", $part);
4923: my $opendate = $self->parmval("opendate", $part);
4924: if ($opendatetype eq 'date_interval') {
4925: my $duedate = $self->duedate($part);
4926: $opendate = $duedate - $opendate;
4927: }
4928: return $opendate;
4929: }
4930: sub problemstatus {
4931: (my $self, my $part) = @_;
4932: my $problemstatus = $self->parmval("problemstatus", $part);
4933: return lc($problemstatus);
4934: }
4935: sub sig {
4936: (my $self, my $part) = @_;
4937: my $sig = $self->parmval("sig", $part);
4938: return $sig;
4939: }
4940: sub tol {
4941: (my $self, my $part) = @_;
4942: my $tol = $self->parmval("tol", $part);
4943: return $tol;
4944: }
4945: sub tries {
4946: my $self = shift;
4947: my $tries = $self->queryRestoreHash('tries', shift);
4948: if (!defined($tries)) { return '0';}
4949: return $tries;
4950: }
4951: sub type {
4952: (my $self, my $part) = @_;
4953: my $type = $self->parmval("type", $part);
4954: return $type;
4955: }
4956: sub weight {
4957: my $self = shift; my $part = shift;
4958: if (!defined($part)) { $part = '0'; }
4959: my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
4960: $self->{SYMB}, $self->{DOMAIN},
4961: $self->{USERNAME},
4962: $env{'request.course.sec'});
4963: return $weight;
4964: }
4965: sub part_display {
4966: my $self= shift(); my $partID = shift();
4967: if (! defined($partID)) { $partID = '0'; }
4968: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
4969: $self->{SYMB});
4970: if (! defined($display) || $display eq '') {
4971: $display = $partID;
4972: }
4973: return $display;
4974: }
4975: sub slot_control {
4976: my $self=shift(); my $part = shift();
4977: if (!defined($part)) { $part = '0'; }
4978: my $useslots = $self->parmval("useslots", $part);
4979: my $availablestudent = $self->parmval("availablestudent", $part);
4980: my $available = $self->parmval("available", $part);
4981: return ($useslots,$availablestudent,$available);
4982: }
4983: sub deeplink {
4984: my ($self,$caller,$action) = @_;
4985: my $deeplink = $self->parmval("deeplink");
4986: if ($deeplink) {
4987: my ($state,$others,$listed,$scope) = split(/,/,$deeplink);
4988: if ($action eq 'getlisted') {
4989: return $listed;
4990: }
4991: if ($env{'request.deeplink.login'}) {
4992: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
4993: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
4994: my $deeplink_symb = &Apache::loncommon::deeplink_login_symb($cnum,$cdom);
4995: if ($deeplink_symb) {
4996: my ($loginmap,$mapname);
4997: if ($deeplink_symb =~ /\.(page|sequence)$/) {
4998: $mapname = $self->enclosing_map_src();
4999: $loginmap = &Apache::lonnet::clutter((&Apache::lonnet::decode_symb($deeplink_symb))[2]);
5000: return if ($mapname eq $loginmap);
5001: } else {
5002: return if ($deeplink_symb eq $self->symb());
5003: if (($scope eq 'map') || ($scope eq 'rec')) {
5004: $mapname = $self->enclosing_map_src();
5005: $loginmap = &Apache::lonnet::clutter((&Apache::lonnet::decode_symb($deeplink_symb))[0]);
5006: return if ($mapname eq $loginmap);
5007: }
5008: }
5009: if ($scope eq 'rec') {
5010: my $map_pc = $self->navHash('map_pc_'.$mapname);
5011: my @recurseup = split(/,/,$self->navHash('map_hierarchy_'.$map_pc));
5012: my $login_pc = $self->navHash('map_pc_'.$loginmap);
5013: return if (grep(/^\Q$login_pc\E$/,@recurseup));
5014: }
5015: }
5016: }
5017: unless (($caller eq 'sequence') || ($state eq 'both')) {
5018: return $listed;
5019: }
5020: }
5021: return;
5022: }
5023:
5024: # Multiple things need this
5025: sub getReturnHash {
5026: my $self = shift;
5027:
5028: if (!defined($self->{RETURN_HASH})) {
5029: my %tmpHash = &Apache::lonnet::restore($self->{SYMB},undef,$self->{DOMAIN},$self->{USERNAME});
5030: $self->{RETURN_HASH} = \%tmpHash;
5031: }
5032: }
5033:
5034: ######
5035: # Status queries
5036: ######
5037:
5038: # These methods query the status of problems.
5039:
5040: # If we need to count parts, this function determines the number of
5041: # parts from the metadata. When called, it returns a reference to a list
5042: # of strings corresponding to the parts. (Thus, using it in a scalar context
5043: # tells you how many parts you have in the problem:
5044: # $partcount = scalar($resource->countParts());
5045: # Don't use $self->{PARTS} directly because you don't know if it's been
5046: # computed yet.
5047:
5048: =pod
5049:
5050: =head2 Resource misc
5051:
5052: Misc. functions for the resource.
5053:
5054: =over 4
5055:
5056: =item * B<hasDiscussion>:
5057:
5058: Returns a false value if there has been discussion since the user last
5059: logged in, true if there has. Always returns false if the discussion
5060: data was not extracted when the nav map was constructed.
5061:
5062: =item * B<last_post_time>:
5063:
5064: Returns a false value if there hasn't been discussion otherwise returns
5065: unix timestamp of last time a discussion posting (or edit) was made.
5066:
5067: =item * B<discussion_info>:
5068:
5069: optional argument is a filter (currently can be 'unread');
5070: returns in scalar context the count of the number of discussion postings.
5071:
5072: returns in list context both the count of postings and a hash ref
5073: containing information about the postings (subject, id, timestamp) in a hash.
5074:
5075: 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.
5076:
5077: =item * B<getFeedback>:
5078:
5079: Gets the feedback for the resource and returns the raw feedback string
5080: for the resource, or the null string if there is no feedback or the
5081: email data was not extracted when the nav map was constructed. Usually
5082: used like this:
5083:
5084: for my $url (split(/\,/, $res->getFeedback())) {
5085: my $link = &escape($url);
5086: ...
5087:
5088: and use the link as appropriate.
5089:
5090: =cut
5091:
5092: sub hasDiscussion {
5093: my $self = shift;
5094: return $self->{NAV_MAP}->hasDiscussion($self->{SYMB});
5095: }
5096:
5097: sub last_post_time {
5098: my $self = shift;
5099: return $self->{NAV_MAP}->last_post_time($self->{SYMB});
5100: }
5101:
5102: sub discussion_info {
5103: my ($self,$filter) = @_;
5104: return $self->{NAV_MAP}->discussion_info($self->{SYMB},$filter);
5105: }
5106:
5107: sub getFeedback {
5108: my $self = shift;
5109: my $source = $self->src();
5110: my $symb = $self->{SYMB};
5111: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
5112: return $self->{NAV_MAP}->getFeedback($symb,$source);
5113: }
5114:
5115: sub getErrors {
5116: my $self = shift;
5117: my $source = $self->src();
5118: my $symb = $self->{SYMB};
5119: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
5120: return $self->{NAV_MAP}->getErrors($symb,$source);
5121: }
5122:
5123: =pod
5124:
5125: =item * B<parts>():
5126:
5127: Returns a list reference containing sorted strings corresponding to
5128: each part of the problem. Single part problems have only a part '0'.
5129: Multipart problems do not return their part '0', since they typically
5130: do not really matter.
5131:
5132: =item * B<countParts>():
5133:
5134: Returns the number of parts of the problem a student can answer. Thus,
5135: for single part problems, returns 1. For multipart, it returns the
5136: number of parts in the problem, not including psuedo-part 0.
5137:
5138: =item * B<countResponses>():
5139:
5140: Returns the total number of responses in the problem a student can answer.
5141:
5142: =item * B<responseTypes>():
5143:
5144: Returns a hash whose keys are the response types. The values are the number
5145: of times each response type is used. This is for the I<entire> problem, not
5146: just a single part.
5147:
5148: =item * B<multipart>():
5149:
5150: Returns true if the problem is multipart, false otherwise. Use this instead
5151: of countParts if all you want is multipart/not multipart.
5152:
5153: =item * B<responseType>($part):
5154:
5155: Returns the response type of the part, without the word "response" on the
5156: end. Example return values: 'string', 'essay', 'numeric', etc.
5157:
5158: =item * B<responseIds>($part):
5159:
5160: Retreives the response IDs for the given part as an array reference containing
5161: strings naming the response IDs. This may be empty.
5162:
5163: =back
5164:
5165: =cut
5166:
5167: sub parts {
5168: my $self = shift;
5169:
5170: if ($self->ext) { return []; }
5171:
5172: $self->extractParts();
5173: return $self->{PARTS};
5174: }
5175:
5176: sub countParts {
5177: my $self = shift;
5178:
5179: my $parts = $self->parts();
5180:
5181: # If I left this here, then it's not necessary.
5182: #my $delta = 0;
5183: #for my $part (@$parts) {
5184: # if ($part eq '0') { $delta--; }
5185: #}
5186:
5187: if ($self->{RESOURCE_ERROR}) {
5188: return 0;
5189: }
5190:
5191: return scalar(@{$parts}); # + $delta;
5192: }
5193:
5194: sub countResponses {
5195: my $self = shift;
5196: my $count;
5197: foreach my $part (@{$self->parts()}) {
5198: $count+= scalar($self->responseIds($part));
5199: }
5200: return $count;
5201: }
5202:
5203: sub responseTypes {
5204: my $self = shift;
5205: my %responses;
5206: foreach my $part (@{$self->parts()}) {
5207: foreach my $responsetype ($self->responseType($part)) {
5208: $responses{$responsetype}++ if (defined($responsetype));
5209: }
5210: }
5211: return %responses;
5212: }
5213:
5214: sub multipart {
5215: my $self = shift;
5216: return $self->countParts() > 1;
5217: }
5218:
5219: sub singlepart {
5220: my $self = shift;
5221: return $self->countParts() == 1;
5222: }
5223:
5224: sub responseType {
5225: my $self = shift;
5226: my $part = shift;
5227:
5228: $self->extractParts();
5229: if (defined($self->{RESPONSE_TYPES}->{$part})) {
5230: return @{$self->{RESPONSE_TYPES}->{$part}};
5231: } else {
5232: return undef;
5233: }
5234: }
5235:
5236: sub responseIds {
5237: my $self = shift;
5238: my $part = shift;
5239:
5240: $self->extractParts();
5241: if (defined($self->{RESPONSE_IDS}->{$part})) {
5242: return @{$self->{RESPONSE_IDS}->{$part}};
5243: } else {
5244: return undef;
5245: }
5246: }
5247:
5248: # Private function: Extracts the parts information, both part names and
5249: # part types, and saves it.
5250: sub extractParts {
5251: my $self = shift;
5252:
5253: return if (defined($self->{PARTS}));
5254: return if ($self->ext);
5255:
5256: $self->{PARTS} = [];
5257:
5258: my %parts;
5259:
5260: # Retrieve part count, if this is a problem
5261: if ($self->is_problem()) {
5262: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
5263: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
5264:
5265: if ($partorder) {
5266: my @parts;
5267: for my $part (split (/,/,$partorder)) {
5268: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
5269: push @parts, $part;
5270: $parts{$part} = 1;
5271: }
5272: }
5273: $self->{PARTS} = \@parts;
5274: } else {
5275: if (!$metadata) {
5276: $self->{RESOURCE_ERROR} = 1;
5277: $self->{PARTS} = [];
5278: $self->{PART_TYPE} = {};
5279: return;
5280: }
5281: foreach my $entry (split(/\,/,$metadata)) {
5282: if ($entry =~ /^(?:part|Task)_(.*)$/) {
5283: my $part = $1;
5284: # This floods the logs if it blows up
5285: if (defined($parts{$part})) {
5286: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->{SYMB});
5287: }
5288:
5289: # check to see if part is turned off.
5290:
5291: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
5292: $parts{$part} = 1;
5293: }
5294: }
5295: }
5296: my @sortedParts = sort(keys(%parts));
5297: $self->{PARTS} = \@sortedParts;
5298: }
5299:
5300:
5301: # These hashes probably do not need names that end with "Hash"....
5302: my %responseIdHash;
5303: my %responseTypeHash;
5304:
5305:
5306: # Init the responseIdHash
5307: foreach my $part (@{$self->{PARTS}}) {
5308: $responseIdHash{$part} = [];
5309: }
5310:
5311: # Now, the unfortunate thing about this is that parts, part name, and
5312: # response id are delimited by underscores, but both the part
5313: # name and response id can themselves have underscores in them.
5314: # So we have to use our knowlege of part names to figure out
5315: # where the part names begin and end, and even then, it is possible
5316: # to construct ambiguous situations.
5317: foreach my $data (split(/,/, $metadata)) {
5318: if ($data =~ /^([a-zA-Z]+)response_(.*)/
5319: || $data =~ /^(Task)_(.*)/) {
5320: my $responseType = $1;
5321: my $partStuff = $2;
5322: my $partIdSoFar = '';
5323: my @partChunks = split(/_/, $partStuff);
5324: my $i = 0;
5325: for ($i = 0; $i < scalar(@partChunks); $i++) {
5326: if ($partIdSoFar) { $partIdSoFar .= '_'; }
5327: $partIdSoFar .= $partChunks[$i];
5328: if ($parts{$partIdSoFar}) {
5329: my @otherChunks = @partChunks[$i+1..$#partChunks];
5330: my $responseId = join('_', @otherChunks);
5331: if ($self->is_task()) {
5332: push(@{$responseIdHash{$partIdSoFar}},
5333: $partIdSoFar);
5334: } else {
5335: push(@{$responseIdHash{$partIdSoFar}},
5336: $responseId);
5337: }
5338: push(@{$responseTypeHash{$partIdSoFar}},
5339: $responseType);
5340: }
5341: }
5342: }
5343: }
5344: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
5345: #
5346: # Reorder the arrays in the %responseIdHash and %responseTypeHash
5347: if ($resorder) {
5348: my @resorder=split(/,/,$resorder);
5349: foreach my $part (keys(%responseIdHash)) {
5350: my $i=0;
5351: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
5352: my @neworder;
5353: foreach my $possibleid (@resorder) {
5354: if (exists($resids{$possibleid})) {
5355: push(@neworder,$resids{$possibleid});
5356: }
5357: }
5358: my @ids;
5359: my @type;
5360: foreach my $element (@neworder) {
5361: push (@ids,$responseIdHash{$part}->[$element]);
5362: push (@type,$responseTypeHash{$part}->[$element]);
5363: }
5364: $responseIdHash{$part}=\@ids;
5365: $responseTypeHash{$part}=\@type;
5366: }
5367: }
5368: $self->{RESPONSE_IDS} = \%responseIdHash;
5369: $self->{RESPONSE_TYPES} = \%responseTypeHash;
5370: }
5371:
5372: return;
5373: }
5374:
5375: =pod
5376:
5377: =head2 Resource Status
5378:
5379: Problem resources have status information, reflecting their various
5380: dates and completion statuses.
5381:
5382: There are two aspects to the status: the date-related information and
5383: the completion information.
5384:
5385: Idiomatic usage of these two methods would probably look something
5386: like
5387:
5388: foreach my $part ($resource->parts()) {
5389: my $dateStatus = $resource->getDateStatus($part);
5390: my $completionStatus = $resource->getCompletionStatus($part);
5391:
5392: or
5393:
5394: my $status = $resource->status($part);
5395:
5396: ... use it here ...
5397: }
5398:
5399: Which you use depends on exactly what you are looking for. The
5400: status() function has been optimized for the nav maps display and may
5401: not precisely match what you need elsewhere.
5402:
5403: The symbolic constants shown below can be accessed through the
5404: resource object: C<$res->OPEN>.
5405:
5406: =over 4
5407:
5408: =item * B<getDateStatus>($part):
5409:
5410: ($part defaults to 0). A convenience function that returns a symbolic
5411: constant telling you about the date status of the part. The possible
5412: return values are:
5413:
5414: =back
5415:
5416: B<Date Codes>
5417:
5418: =over 4
5419:
5420: =item * B<OPEN_LATER>:
5421:
5422: The problem will be opened later.
5423:
5424: =item * B<OPEN>:
5425:
5426: Open and not yet due.
5427:
5428:
5429: =item * B<PAST_DUE_ANSWER_LATER>:
5430:
5431: The due date has passed, but the answer date has not yet arrived.
5432:
5433: =item * B<PAST_DUE_NO_ANSWER>:
5434:
5435: The due date has passed and there is no answer opening date set.
5436:
5437: =item * B<ANSWER_OPEN>:
5438:
5439: The answer date is here.
5440:
5441: =item * B<NETWORK_FAILURE>:
5442:
5443: The information is unknown due to network failure.
5444:
5445: =back
5446:
5447: =cut
5448:
5449: # Apparently the compiler optimizes these into constants automatically
5450: sub OPEN_LATER { return 0; }
5451: sub OPEN { return 1; }
5452: sub PAST_DUE_NO_ANSWER { return 2; }
5453: sub PAST_DUE_ANSWER_LATER { return 3; }
5454: sub ANSWER_OPEN { return 4; }
5455: sub NOTHING_SET { return 5; }
5456: sub NETWORK_FAILURE { return 100; }
5457:
5458: # getDateStatus gets the date status for a given problem part.
5459: # Because answer date, due date, and open date are fully independent
5460: # (i.e., it is perfectly possible to *only* have an answer date),
5461: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
5462: # (past, future, none given). This function handles this with a decision
5463: # tree. Read the comments to follow the decision tree.
5464:
5465: sub getDateStatus {
5466: my $self = shift;
5467: my $part = shift;
5468: $part = "0" if (!defined($part));
5469:
5470: # Always return network failure if there was one.
5471: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5472:
5473: my $now = time();
5474:
5475: my $open = $self->opendate($part);
5476: my $due = $self->duedate($part);
5477: my $answer = $self->answerdate($part);
5478:
5479: if (!$open && !$due && !$answer) {
5480: # no data on the problem at all
5481: # should this be the same as "open later"? think multipart.
5482: return $self->NOTHING_SET;
5483: }
5484: if (!$open || $now < $open) {return $self->OPEN_LATER}
5485: if (!$due || $now < $due) {return $self->OPEN}
5486: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
5487: if ($answer) { return $self->ANSWER_OPEN; }
5488: return PAST_DUE_NO_ANSWER;
5489: }
5490:
5491: =pod
5492:
5493: B<>
5494:
5495: =over 4
5496:
5497: =item * B<getCompletionStatus>($part):
5498:
5499: ($part defaults to 0.) A convenience function that returns a symbolic
5500: constant telling you about the completion status of the part, with the
5501: following possible results:
5502:
5503: =back
5504:
5505: B<Completion Codes>
5506:
5507: =over 4
5508:
5509: =item * B<NOT_ATTEMPTED>:
5510:
5511: Has not been attempted at all.
5512:
5513: =item * B<INCORRECT>:
5514:
5515: Attempted, but wrong by student.
5516:
5517: =item * B<INCORRECT_BY_OVERRIDE>:
5518:
5519: Attempted, but wrong by instructor override.
5520:
5521: =item * B<CORRECT>:
5522:
5523: Correct or correct by instructor.
5524:
5525: =item * B<CORRECT_BY_OVERRIDE>:
5526:
5527: Correct by instructor override.
5528:
5529: =item * B<EXCUSED>:
5530:
5531: Excused. Not yet implemented.
5532:
5533: =item * B<NETWORK_FAILURE>:
5534:
5535: Information not available due to network failure.
5536:
5537: =item * B<ATTEMPTED>:
5538:
5539: Attempted, and not yet graded.
5540:
5541: =item * B<CREDIT_ATTEMPTED>:
5542:
5543: Attempted, and credit received for attempt (survey and anonymous survey only).
5544:
5545: =back
5546:
5547: =cut
5548:
5549: sub NOT_ATTEMPTED { return 10; }
5550: sub INCORRECT { return 11; }
5551: sub INCORRECT_BY_OVERRIDE { return 12; }
5552: sub CORRECT { return 13; }
5553: sub CORRECT_BY_OVERRIDE { return 14; }
5554: sub EXCUSED { return 15; }
5555: sub ATTEMPTED { return 16; }
5556: sub CREDIT_ATTEMPTED { return 17; }
5557:
5558: sub getCompletionStatus {
5559: my $self = shift;
5560: my $part = shift;
5561: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5562:
5563: my $status = $self->queryRestoreHash('solved', $part);
5564:
5565: # Left as separate if statements in case we ever do more with this
5566: if ($status eq 'correct_by_student') {return $self->CORRECT;}
5567: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
5568: if ($status eq 'correct_by_override') {
5569: return $self->CORRECT_BY_OVERRIDE;
5570: }
5571: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
5572: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
5573: if ($status eq 'excused') {return $self->EXCUSED; }
5574: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
5575: if ($status eq 'credit_attempted') {
5576: if ($self->is_anonsurvey($part) || $self->is_survey($part)) {
5577: return $self->CREDIT_ATTEMPTED;
5578: } else {
5579: return $self->ATTEMPTED;
5580: }
5581: }
5582: return $self->NOT_ATTEMPTED;
5583: }
5584:
5585: sub queryRestoreHash {
5586: my $self = shift;
5587: my $hashentry = shift;
5588: my $part = shift;
5589: $part = "0" if (!defined($part) || $part eq '');
5590: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5591:
5592: $self->getReturnHash();
5593:
5594: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
5595: }
5596:
5597: =pod
5598:
5599: B<Composite Status>
5600:
5601: Along with directly returning the date or completion status, the
5602: resource object includes a convenience function B<status>() that will
5603: combine the two status tidbits into one composite status that can
5604: represent the status of the resource as a whole. This method represents
5605: the concept of the thing we want to display to the user on the nav maps
5606: screen, which is a combination of completion and open status. The precise logic is
5607: documented in the comments of the status method. The following results
5608: may be returned, all available as methods on the resource object
5609: ($res->NETWORK_FAILURE): In addition to the return values that match
5610: the date or completion status, this function can return "ANSWER_SUBMITTED"
5611: if that problemstatus parameter value is set to No, suppressing the
5612: incorrect/correct feedback.
5613:
5614: =over 4
5615:
5616: =item * B<NETWORK_FAILURE>:
5617:
5618: The network has failed and the information is not available.
5619:
5620: =item * B<NOTHING_SET>:
5621:
5622: No dates have been set for this problem (part) at all. (Because only
5623: certain parts of a multi-part problem may be assigned, this can not be
5624: collapsed into "open later", as we do not know a given part will EVER
5625: be opened. For single part, this is the same as "OPEN_LATER".)
5626:
5627: =item * B<CORRECT>:
5628:
5629: For any reason at all, the part is considered correct.
5630:
5631: =item * B<EXCUSED>:
5632:
5633: For any reason at all, the problem is excused.
5634:
5635: =item * B<PAST_DUE_NO_ANSWER>:
5636:
5637: The problem is past due, not considered correct, and no answer date is
5638: set.
5639:
5640: =item * B<PAST_DUE_ANSWER_LATER>:
5641:
5642: The problem is past due, not considered correct, and an answer date in
5643: the future is set.
5644:
5645: =item * B<ANSWER_OPEN>:
5646:
5647: The problem is past due, not correct, and the answer is now available.
5648:
5649: =item * B<OPEN_LATER>:
5650:
5651: The problem is not yet open.
5652:
5653: =item * B<TRIES_LEFT>:
5654:
5655: The problem is open, has been tried, is not correct, but there are
5656: tries left.
5657:
5658: =item * B<INCORRECT>:
5659:
5660: The problem is open, and all tries have been used without getting the
5661: correct answer.
5662:
5663: =item * B<OPEN>:
5664:
5665: The item is open and not yet tried.
5666:
5667: =item * B<ATTEMPTED>:
5668:
5669: The problem has been attempted.
5670:
5671: =item * B<CREDIT_ATTEMPTED>:
5672:
5673: The problem has been attempted, and credit given for the attempt (survey and anonymous survey only).
5674:
5675: =item * B<ANSWER_SUBMITTED>:
5676:
5677: An answer has been submitted, but the student should not see it.
5678:
5679: =back
5680:
5681: =cut
5682:
5683: sub TRIES_LEFT { return 20; }
5684: sub ANSWER_SUBMITTED { return 21; }
5685: sub PARTIALLY_CORRECT { return 22; }
5686:
5687: sub RESERVED_LATER { return 30; }
5688: sub RESERVED { return 31; }
5689: sub RESERVED_LOCATION { return 32; }
5690: sub RESERVABLE { return 33; }
5691: sub RESERVABLE_LATER { return 34; }
5692: sub NOTRESERVABLE { return 35; }
5693: sub NOT_IN_A_SLOT { return 36; }
5694: sub NEEDS_CHECKIN { return 37; }
5695: sub WAITING_FOR_GRADE { return 38; }
5696: sub UNKNOWN { return 39; }
5697:
5698: sub status {
5699: my $self = shift;
5700: my $part = shift;
5701: if (!defined($part)) { $part = "0"; }
5702: my $completionStatus = $self->getCompletionStatus($part);
5703: my $dateStatus = $self->getDateStatus($part);
5704:
5705: # What we have is a two-dimensional matrix with 4 entries on one
5706: # dimension and 5 entries on the other, which we want to colorize,
5707: # plus network failure and "no date data at all".
5708:
5709: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
5710: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
5711:
5712: my $suppressFeedback = 0;
5713: if (($self->problemstatus($part) eq 'no') ||
5714: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5715: $suppressFeedback = 1;
5716: }
5717: # If there's an answer date and we're past it, don't
5718: # suppress the feedback; student should know
5719: if ($self->duedate($part) && $self->duedate($part) < time() &&
5720: $self->answerdate($part) && $self->answerdate($part) < time()) {
5721: $suppressFeedback = 0;
5722: }
5723:
5724: # There are a few whole rows we can dispose of:
5725: if ($completionStatus == CORRECT ||
5726: $completionStatus == CORRECT_BY_OVERRIDE ) {
5727: if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
5728: my $awarded=$self->awarded($part);
5729: if ($awarded < 1 && $awarded > 0) {
5730: return PARTIALLY_CORRECT;
5731: } elsif ($awarded<1) {
5732: return INCORRECT;
5733: }
5734: return CORRECT;
5735: }
5736:
5737: # If it's WRONG... and not open
5738: if ( ($completionStatus == INCORRECT ||
5739: $completionStatus == INCORRECT_BY_OVERRIDE)
5740: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
5741: return INCORRECT;
5742: }
5743:
5744: if ($completionStatus == ATTEMPTED) {
5745: return ATTEMPTED;
5746: }
5747:
5748: if ($completionStatus == CREDIT_ATTEMPTED) {
5749: return CREDIT_ATTEMPTED;
5750: }
5751:
5752: # If it's EXCUSED, then return that no matter what
5753: if ($completionStatus == EXCUSED) {
5754: return EXCUSED;
5755: }
5756:
5757: if ($dateStatus == NOTHING_SET) {
5758: return NOTHING_SET;
5759: }
5760:
5761: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
5762: # by 4 matrix (date statuses).
5763:
5764: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
5765: $dateStatus == PAST_DUE_NO_ANSWER ) {
5766: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
5767: }
5768:
5769: if ($dateStatus == ANSWER_OPEN) {
5770: return ANSWER_OPEN;
5771: }
5772:
5773: # Now: (incorrect, incorrect_override, not_attempted) x
5774: # (open_later), (open)
5775:
5776: if ($dateStatus == OPEN_LATER) {
5777: return OPEN_LATER;
5778: }
5779:
5780: # If it's WRONG...
5781: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
5782: # and there are TRIES LEFT:
5783: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
5784: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
5785: }
5786: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
5787: }
5788:
5789: # Otherwise, it's untried and open
5790: return OPEN;
5791: }
5792:
5793: sub check_for_slot {
5794: my $self = shift;
5795: my $part = shift;
5796: my $symb = $self->{SYMB};
5797: my ($use_slots,$available,$availablestudent) = $self->slot_control($part);
5798: if (($use_slots ne '') && ($use_slots !~ /^\s*no\s*$/i)) {
5799: my @slots = (split(/:/,$availablestudent),split(/:/,$available));
5800: my $cid=$env{'request.course.id'};
5801: my $cdom=$env{'course.'.$cid.'.domain'};
5802: my $cnum=$env{'course.'.$cid.'.num'};
5803: my $now = time;
5804: my $num_usable_slots = 0;
5805: my ($checkedin,$checkedinslot,%consumed_uniq,%slots);
5806: if (@slots > 0) {
5807: %slots=&Apache::lonnet::get('slots',[@slots],$cdom,$cnum);
5808: if (&Apache::lonnet::error(%slots)) {
5809: return (UNKNOWN);
5810: }
5811: my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots,'starttime');
5812: foreach my $slot_name (@sorted_slots) {
5813: next if (!defined($slots{$slot_name}) || !ref($slots{$slot_name}));
5814: my $end = $slots{$slot_name}->{'endtime'};
5815: my $start = $slots{$slot_name}->{'starttime'};
5816: my $ip = $slots{$slot_name}->{'ip'};
5817: if ($self->simpleStatus() == OPEN) {
5818: if ($end > $now) {
5819: if ($start > $now) {
5820: return (RESERVED_LATER,$start,$slot_name);
5821: } else {
5822: if ($ip ne '') {
5823: if (!&Apache::loncommon::check_ip_acc($ip)) {
5824: return (RESERVED_LOCATION,$end,$slot_name);
5825: }
5826: }
5827: my @proctors;
5828: if ($slots{$slot_name}->{'proctor'} ne '') {
5829: @proctors = split(',',$slots{$slot_name}->{'proctor'});
5830: }
5831: if (@proctors > 0) {
5832: ($checkedin,$checkedinslot) = $self->checkedin();
5833: unless ((grep(/^\Q$checkedin\E/,@proctors)) &&
5834: ($checkedinslot eq $slot_name)) {
5835: return (NEEDS_CHECKIN,$end,$slot_name);
5836: }
5837: }
5838: return (RESERVED,$end,$slot_name);
5839: }
5840: }
5841: } elsif ($end > $now) {
5842: $num_usable_slots ++;
5843: }
5844: }
5845: my ($is_correct,$wait_for_grade);
5846: if ($self->is_task()) {
5847: my $taskstatus = $self->taskstatus();
5848: $is_correct = (($taskstatus eq 'pass') ||
5849: ($self->solved() =~ /^correct_/));
5850: unless ($taskstatus =~ /^(?:pass|fail)$/) {
5851: $wait_for_grade = 1;
5852: }
5853: } else {
5854: unless ($self->completable()) {
5855: $wait_for_grade = 1;
5856: }
5857: unless (($self->problemstatus($part) eq 'no') ||
5858: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5859: $is_correct = ($self->solved($part) =~ /^correct_/);
5860: $wait_for_grade = 0;
5861: }
5862: }
5863: ($checkedin,$checkedinslot) = $self->checkedin();
5864: if ($checkedin) {
5865: if (ref($slots{$checkedinslot}) eq 'HASH') {
5866: $consumed_uniq{$checkedinslot} = $slots{$checkedinslot}{'uniqueperiod'};
5867: }
5868: if ($wait_for_grade) {
5869: return (WAITING_FOR_GRADE);
5870: } elsif ($is_correct) {
5871: return (CORRECT);
5872: }
5873: }
5874: if ($num_usable_slots) {
5875: return(NOT_IN_A_SLOT);
5876: }
5877: }
5878: my $reservable = &Apache::lonnet::get_reservable_slots($cnum,$cdom,$env{'user.name'},
5879: $env{'user.domain'});
5880: if (ref($reservable) eq 'HASH') {
5881: if ((ref($reservable->{'now_order'}) eq 'ARRAY') && (ref($reservable->{'now'}) eq 'HASH')) {
5882: foreach my $slot (reverse (@{$reservable->{'now_order'}})) {
5883: my $canuse;
5884: if (($reservable->{'now'}{$slot}{'symb'} eq '') ||
5885: ($reservable->{'now'}{$slot}{'symb'} eq $symb)) {
5886: $canuse = 1;
5887: }
5888: if ($canuse) {
5889: if ($checkedin) {
5890: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5891: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5892: if ($reservable->{'now'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5893: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5894: next if (!
5895: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5896: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5897: }
5898: }
5899: }
5900: return(RESERVABLE,$reservable->{'now'}{$slot}{'endreserve'});
5901: }
5902: }
5903: }
5904: if ((ref($reservable->{'future_order'}) eq 'ARRAY') && (ref($reservable->{'future'}) eq 'HASH')) {
5905: foreach my $slot (@{$reservable->{'future_order'}}) {
5906: my $canuse;
5907: if (($reservable->{'future'}{$slot}{'symb'} eq '') ||
5908: ($reservable->{'future'}{$slot}{'symb'} eq $symb)) {
5909: $canuse = 1;
5910: }
5911: if ($canuse) {
5912: if ($checkedin) {
5913: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5914: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5915: if ($reservable->{'future'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5916: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5917: next if (!
5918: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5919: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5920: }
5921: }
5922: }
5923: return(RESERVABLE_LATER,$reservable->{'future'}{$slot}{'startreserve'});
5924: }
5925: }
5926: }
5927: }
5928: return(NOTRESERVABLE);
5929: }
5930: return;
5931: }
5932:
5933: sub CLOSED { return 23; }
5934: sub ERROR { return 24; }
5935:
5936: =pod
5937:
5938: B<Simple Status>
5939:
5940: Convenience method B<simpleStatus> provides a "simple status" for the resource.
5941: "Simple status" corresponds to "which icon is shown on the
5942: Navmaps". There are six "simple" statuses:
5943:
5944: =over 4
5945:
5946: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
5947:
5948: =item * B<OPEN>: The problem is open and unattempted.
5949:
5950: =item * B<CORRECT>: The problem is correct for any reason.
5951:
5952: =item * B<INCORRECT>: The problem is incorrect and can still be
5953: completed successfully.
5954:
5955: =item * B<ATTEMPTED>: The problem has been attempted, but the student
5956: does not know if they are correct. (The ellipsis icon.)
5957:
5958: =item * B<ERROR>: There is an error retrieving information about this
5959: problem.
5960:
5961: =back
5962:
5963: =cut
5964:
5965: # This hash maps the composite status to this simple status, and
5966: # can be used directly, if you like
5967: my %compositeToSimple =
5968: (
5969: NETWORK_FAILURE() => ERROR,
5970: NOTHING_SET() => CLOSED,
5971: CORRECT() => CORRECT,
5972: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
5973: EXCUSED() => CORRECT,
5974: PAST_DUE_NO_ANSWER() => INCORRECT,
5975: PAST_DUE_ANSWER_LATER() => INCORRECT,
5976: ANSWER_OPEN() => INCORRECT,
5977: OPEN_LATER() => CLOSED,
5978: TRIES_LEFT() => OPEN,
5979: INCORRECT() => INCORRECT,
5980: OPEN() => OPEN,
5981: ATTEMPTED() => ATTEMPTED,
5982: CREDIT_ATTEMPTED() => CORRECT,
5983: ANSWER_SUBMITTED() => ATTEMPTED
5984: );
5985:
5986: sub simpleStatus {
5987: my $self = shift;
5988: my $part = shift;
5989: my $status = $self->status($part);
5990: return $compositeToSimple{$status};
5991: }
5992:
5993: =pod
5994:
5995: B<simpleStatusCount> will return an array reference containing, in
5996: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
5997: and ERROR parts the given problem has.
5998:
5999: =cut
6000:
6001: # This maps the status to the slot we want to increment
6002: my %statusToSlotMap =
6003: (
6004: OPEN() => 0,
6005: CLOSED() => 1,
6006: CORRECT() => 2,
6007: INCORRECT() => 3,
6008: ATTEMPTED() => 4,
6009: ERROR() => 5
6010: );
6011:
6012: sub statusToSlot { return $statusToSlotMap{shift()}; }
6013:
6014: sub simpleStatusCount {
6015: my $self = shift;
6016:
6017: my @counts = (0, 0, 0, 0, 0, 0, 0);
6018: foreach my $part (@{$self->parts()}) {
6019: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
6020: }
6021:
6022: return \@counts;
6023: }
6024:
6025: =pod
6026:
6027: B<Completable>
6028:
6029: The completable method represents the concept of I<whether the student can
6030: currently do the problem>. If the student can do the problem, which means
6031: that it is open, there are tries left, and if the problem is manually graded
6032: or the grade is suppressed via problemstatus, the student has not tried it
6033: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
6034: either the student has tried it and there is no feedback, or that for
6035: some reason it is no longer completable (not open yet, successfully completed,
6036: out of tries, etc.). As an example, this is used as the filter for the
6037: "Uncompleted Homework" option for the nav maps.
6038:
6039: If this does not quite meet your needs, do not fiddle with it (unless you are
6040: fixing it to better match the student's conception of "completable" because
6041: it's broken somehow)... make a new method.
6042:
6043: =cut
6044:
6045: sub completable {
6046: my $self = shift;
6047: if (!$self->is_problem()) { return 0; }
6048: my $partCount = $self->countParts();
6049:
6050: foreach my $part (@{$self->parts()}) {
6051: if ($part eq '0' && $partCount != 1) { next; }
6052: my $status = $self->status($part);
6053: # "If any of the parts are open, or have tries left (implies open),
6054: # and it is not "attempted" (manually graded problem), it is
6055: # not "complete"
6056: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
6057: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
6058: $status == ANSWER_SUBMITTED() ) {
6059: # did this part already, as well as we can
6060: next;
6061: }
6062: if ($status == OPEN() || $status == TRIES_LEFT()) {
6063: return 1;
6064: }
6065: }
6066:
6067: # If all the parts were complete, so was this problem.
6068: return 0;
6069: }
6070:
6071: =pod
6072:
6073: B<Answerable>
6074:
6075: The answerable method differs from the completable method in its handling of problem parts
6076: for which feedback on correctness is suppressed, but the student still has tries left, and
6077: the problem part is not past due, (i.e., the student could submit a different answer if
6078: he/she so chose). For that case completable will return 0, whereas answerable will return 1.
6079:
6080: =cut
6081:
6082: sub answerable {
6083: my $self = shift;
6084: if (!$self->is_problem()) { return 0; }
6085: my $partCount = $self->countParts();
6086: foreach my $part (@{$self->parts()}) {
6087: if ($part eq '0' && $partCount != 1) { next; }
6088: my $status = $self->status($part);
6089: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
6090: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
6091: $status == ANSWER_SUBMITTED() ) {
6092: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
6093: return 1;
6094: }
6095: }
6096: if ($status == OPEN() || $status == TRIES_LEFT() || $status == NETWORK_FAILURE()) {
6097: return 1;
6098: }
6099: }
6100: # None of the parts were answerable, so neither is this problem.
6101: return 0;
6102: }
6103:
6104: =pod
6105:
6106: =head2 Resource/Nav Map Navigation
6107:
6108: =over 4
6109:
6110: =item * B<getNext>():
6111:
6112: Retreive an array of the possible next resources after this
6113: one. Always returns an array, even in the one- or zero-element case.
6114:
6115: =item * B<getPrevious>():
6116:
6117: Retreive an array of the possible previous resources from this
6118: one. Always returns an array, even in the one- or zero-element case.
6119:
6120: =cut
6121:
6122: sub getNext {
6123: my $self = shift;
6124: my @branches;
6125: my $to = $self->to();
6126: foreach my $branch ( split(/,/, $to) ) {
6127: my $choice = $self->{NAV_MAP}->getById($branch);
6128: #if (!$choice->condition()) { next; }
6129: my $next = $choice->goesto();
6130: $next = $self->{NAV_MAP}->getById($next);
6131:
6132: push @branches, $next;
6133: }
6134: return \@branches;
6135: }
6136:
6137: sub getPrevious {
6138: my $self = shift;
6139: my @branches;
6140: my $from = $self->from();
6141: foreach my $branch ( split(/,/, $from)) {
6142: my $choice = $self->{NAV_MAP}->getById($branch);
6143: my $prev = $choice->comesfrom();
6144: $prev = $self->{NAV_MAP}->getById($prev);
6145:
6146: push @branches, $prev;
6147: }
6148: return \@branches;
6149: }
6150:
6151: sub browsePriv {
6152: my $self = shift;
6153: my $noblockcheck = shift;
6154: my $deeplinklisted = shift;
6155: if (defined($self->{BROWSE_PRIV})) {
6156: return $self->{BROWSE_PRIV};
6157: }
6158: my ($nodeeplinkcheck,$nodeeplinkout);
6159: if ($deeplinklisted) {
6160: my $deeplink = $self->deeplink(undef,'getlisted');
6161: if (($deeplink) && ($deeplink ne 'absent')) {
6162: $nodeeplinkcheck = 1;
6163: }
6164: $nodeeplinkout = 1;
6165: }
6166: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
6167: $self->{SYMB},undef,
6168: undef,$noblockcheck,
6169: undef,$nodeeplinkcheck,
6170: $nodeeplinkout);
6171: }
6172:
6173: =pod
6174:
6175: =back
6176:
6177: =cut
6178:
6179: 1;
6180:
6181: __END__
6182:
6183:
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