Annotation of loncom/interface/lonnavmaps.pm, revision 1.423.4.2
1.2 www 1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
1.1 www 3: #
1.423.4.2! gci 4: # $Id: lonnavmaps.pm,v 1.423.4.1 2009/09/23 14:28:33 gci Exp $
1.20 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.245 www 28: ###
1.2 www 29:
1.416 jms 30: =pod
31:
32: =head1 NAME
33:
1.423.4.1 gci 34: Apache::lonnavmaps - Subroutines to handle and render the navigation
1.416 jms 35:
36: =head1 SYNOPSIS
37:
38: Handles navigational maps.
39:
40: The main handler generates the navigational listing for the course,
41: the other objects export this information in a usable fashion for
42: other modules.
43:
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48:
49: =head1 OVERVIEW
50:
51: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
52: course structure and caches it in what is often referred to as the
53: "big hash" X<big hash>. You can see it if you are logged into
54: LON-CAPA, in a course, by going to /adm/test. (You may need to
55: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
56: content of the hash will be under the heading "Big Hash".
57:
58: Big Hash contains, among other things, how resources are related
59: to each other (next/previous), what resources are maps, which
60: resources are being chosen to not show to the student (for random
61: selection), and a lot of other things that can take a lot of time
62: to compute due to the amount of data that needs to be collected and
63: processed.
64:
65: Apache::lonnavmaps provides an object model for manipulating this
66: information in a higher-level fashion than directly manipulating
67: the hash. It also provides access to several auxilary functions
68: that aren't necessarily stored in the Big Hash, but are a per-
69: resource sort of value, like whether there is any feedback on
70: a given resource.
71:
72: Apache::lonnavmaps also abstracts away branching, and someday,
73: conditions, for the times where you don't really care about those
74: things.
75:
76: Apache::lonnavmaps also provides fairly powerful routines for
77: rendering navmaps, and last but not least, provides the navmaps
78: view for when the user clicks the NAV button.
79:
80: B<Note>: Apache::lonnavmaps I<only> works for the "currently
81: logged in user"; if you want things like "due dates for another
82: student" lonnavmaps can not directly retrieve information like
83: that. You need the EXT function. This module can still help,
84: because many things, such as the course structure, are constant
85: between users, and Apache::lonnavmaps can help by providing
86: symbs for the EXT call.
87:
88: The rest of this file will cover the provided rendering routines,
89: which can often be used without fiddling with the navmap object at
90: all, then documents the Apache::lonnavmaps::navmap object, which
91: is the key to accessing the Big Hash information, covers the use
92: of the Iterator (which provides the logic for traversing the
93: somewhat-complicated Big Hash data structure), documents the
94: Apache::lonnavmaps::Resource objects that are returned by
95:
96: =head1 Subroutine: render
97:
98: The navmap renderer package provides a sophisticated rendering of the
99: standard navigation maps interface into HTML. The provided nav map
100: handler is actually just a glorified call to this.
101:
102: Because of the large number of parameters this function accepts,
103: instead of passing it arguments as is normal, pass it in an anonymous
104: hash with the desired options.
105:
106: The package provides a function called 'render', called as
107: Apache::lonnavmaps::render({}).
108:
109: =head2 Overview of Columns
110:
111: The renderer will build an HTML table for the navmap and return
112: it. The table consists of several columns, and a row for each
113: resource (or possibly each part). You tell the renderer how many
114: columns to create and what to place in each column, optionally using
115: one or more of the prepared columns, and the renderer will assemble
116: the table.
117:
118: Any additional generally useful column types should be placed in the
119: renderer code here, so anybody can use it anywhere else. Any code
120: specific to the current application (such as the addition of <input>
121: elements in a column) should be placed in the code of the thing using
122: the renderer.
123:
124: At the core of the renderer is the array reference COLS (see Example
125: section below for how to pass this correctly). The COLS array will
126: consist of entries of one of two types of things: Either an integer
127: representing one of the pre-packaged column types, or a sub reference
128: that takes a resource reference, a part number, and a reference to the
129: argument hash passed to the renderer, and returns a string that will
130: be inserted into the HTML representation as it.
131:
132: All other parameters are ways of either changing how the columns
133: are printing, or which rows are shown.
134:
135: The pre-packaged column names are refered to by constants in the
136: Apache::lonnavmaps namespace. The following currently exist:
137:
138: =over 4
139:
140: =item * B<Apache::lonnavmaps::resource>:
141:
142: The general info about the resource: Link, icon for the type, etc. The
143: first column in the standard nav map display. This column provides the
144: indentation effect seen in the B<NAV> screen. This column also accepts
145: the following parameters in the renderer hash:
146:
147: =over 4
148:
149: =item * B<resource_nolink>: default false
150:
151: If true, the resource will not be linked. By default, all non-folder
152: resources are linked.
153:
154: =item * B<resource_part_count>: default true
155:
156: If true, the resource will show a part count B<if> the full
157: part list is not displayed. (See "condense_parts" later.) If false,
158: the resource will never show a part count.
159:
160: =item * B<resource_no_folder_link>:
161:
162: If true, the resource's folder will not be clickable to open or close
163: it. Default is false. True implies printCloseAll is false, since you
164: can't close or open folders when this is on anyhow.
165:
166: =back
167:
168: =item * B<Apache::lonnavmaps::communication_status>:
169:
170: Whether there is discussion on the resource, email for the user, or
171: (lumped in here) perl errors in the execution of the problem. This is
172: the second column in the main nav map.
173:
174: =item * B<Apache::lonnavmaps::quick_status>:
175:
176: An icon for the status of a problem, with five possible states:
177: Correct, incorrect, open, awaiting grading (for a problem where the
178: computer's grade is suppressed, or the computer can't grade, like
179: essay problem), or none (not open yet, not a problem). The
180: third column of the standard navmap.
181:
182: =item * B<Apache::lonnavmaps::long_status>:
183:
184: A text readout of the details of the current status of the problem,
185: such as "Due in 22 hours". The fourth column of the standard navmap.
186:
187: =item * B<Apache::lonnavmaps::part_status_summary>:
188:
189: A text readout summarizing the status of the problem. If it is a
190: single part problem, will display "Correct", "Incorrect",
191: "Not yet open", "Open", "Attempted", or "Error". If there are
192: multiple parts, this will output a string that in HTML will show a
193: status of how many parts are in each status, in color coding, trying
194: to match the colors of the icons within reason.
1.1 www 195:
1.416 jms 196: Note this only makes sense if you are I<not> showing parts. If
197: C<showParts> is true (see below), this column will not output
198: anything.
1.2 www 199:
1.416 jms 200: =back
1.133 bowersj2 201:
1.416 jms 202: If you add any others please be sure to document them here.
1.133 bowersj2 203:
1.416 jms 204: An example of a column renderer that will show the ID number of a
205: resource, along with the part name if any:
1.140 bowersj2 206:
1.416 jms 207: sub {
208: my ($resource, $part, $params) = @_;
209: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
210: return '<td>' . $resource->{ID} . '</td>';
211: }
1.135 bowersj2 212:
1.416 jms 213: Note these functions are responsible for the TD tags, which allow them
214: to override vertical and horizontal alignment, etc.
1.133 bowersj2 215:
1.416 jms 216: =head2 Parameters
1.130 www 217:
1.416 jms 218: Minimally, you should be
219: able to get away with just using 'cols' (to specify the columns
220: shown), 'url' (necessary for the folders to link to the current screen
221: correctly), and possibly 'queryString' if your app calls for it. In
222: that case, maintaining the state of the folders will be done
223: automatically.
1.268 albertel 224:
1.416 jms 225: =over 4
1.268 albertel 226:
1.416 jms 227: =item * B<iterator>: default: constructs one from %env
1.51 bowersj2 228:
1.416 jms 229: A reference to a fresh ::iterator to use from the navmaps. The
230: rendering will reflect the options passed to the iterator, so you can
231: use that to just render a certain part of the course, if you like. If
232: one is not passed, the renderer will attempt to construct one from
233: env{'form.filter'} and env{'form.condition'} information, plus the
234: 'iterator_map' parameter if any.
1.51 bowersj2 235:
1.416 jms 236: =item * B<iterator_map>: default: not used
1.51 bowersj2 237:
1.416 jms 238: If you are letting the renderer do the iterator handling, you can
239: instruct the renderer to render only a particular map by passing it
240: the source of the map you want to process, like
241: '/res/103/jerf/navmap.course.sequence'.
1.51 bowersj2 242:
1.416 jms 243: =item * B<include_top_level_map>: default: false
1.51 bowersj2 244:
1.416 jms 245: If you need to include the top level map (meaning the course) in the
246: rendered output set this to true
1.51 bowersj2 247:
1.416 jms 248: =item * B<navmap>: default: constructs one from %env
1.51 bowersj2 249:
1.416 jms 250: A reference to a navmap, used only if an iterator is not passed in. If
251: this is necessary to make an iterator but it is not passed in, a new
252: one will be constructed based on env info. This is useful to do basic
253: error checking before passing it off to render.
1.51 bowersj2 254:
1.416 jms 255: =item * B<r>: default: must be passed in
1.53 bowersj2 256:
1.416 jms 257: The standard Apache response object. This must be passed to the
258: renderer or the course hash will be locked.
1.53 bowersj2 259:
1.416 jms 260: =item * B<cols>: default: empty (useless)
1.407 raeburn 261:
1.416 jms 262: An array reference
1.53 bowersj2 263:
1.416 jms 264: =item * B<showParts>:default true
1.115 bowersj2 265:
1.416 jms 266: A flag. If true, a line for the resource itself, and a line
267: for each part will be displayed. If not, only one line for each
268: resource will be displayed.
1.115 bowersj2 269:
1.416 jms 270: =item * B<condenseParts>: default true
1.115 bowersj2 271:
1.416 jms 272: A flag. If true, if all parts of the problem have the same
273: status and that status is Nothing Set, Correct, or Network Failure,
274: then only one line will be displayed for that resource anyhow. If no,
275: all parts will always be displayed. If showParts is 0, this is
276: ignored.
1.115 bowersj2 277:
1.416 jms 278: =item * B<jumpCount>: default: determined from %env
1.115 bowersj2 279:
1.416 jms 280: A string identifying the URL to place the anchor 'curloc' at.
281: It is the responsibility of the renderer user to
282: ensure that the #curloc is in the URL. By default, determined through
283: the use of the env{} 'jump' information, and should normally "just
284: work" correctly.
1.177 www 285:
1.416 jms 286: =item * B<here>: default: empty string
1.68 bowersj2 287:
1.416 jms 288: A Symb identifying where to place the 'here' marker. The empty
289: string means no marker.
1.73 bowersj2 290:
1.416 jms 291: =item * B<indentString>: default: 25 pixel whitespace image
1.347 www 292:
1.416 jms 293: A string identifying the indentation string to use.
1.347 www 294:
1.416 jms 295: =item * B<queryString>: default: empty
1.346 foxr 296:
1.416 jms 297: A string which will be prepended to the query string used when the
298: folders are opened or closed. You can use this to pass
299: application-specific values.
1.73 bowersj2 300:
1.416 jms 301: =item * B<url>: default: none
1.73 bowersj2 302:
1.416 jms 303: The url the folders will link to, which should be the current
304: page. Required if the resource info column is shown, and you
305: are allowing the user to open and close folders.
1.73 bowersj2 306:
1.416 jms 307: =item * B<currentJumpIndex>: default: no jumping
1.73 bowersj2 308:
1.416 jms 309: Describes the currently-open row number to cause the browser to jump
310: to, because the user just opened that folder. By default, pulled from
311: the Jump information in the env{'form.*'}.
1.73 bowersj2 312:
1.416 jms 313: =item * B<printKey>: default: false
1.101 bowersj2 314:
1.416 jms 315: If true, print the key that appears on the top of the standard
316: navmaps.
1.73 bowersj2 317:
1.416 jms 318: =item * B<printCloseAll>: default: true
1.73 bowersj2 319:
1.416 jms 320: If true, print the "Close all folders" or "open all folders"
321: links.
1.403 albertel 322:
1.416 jms 323: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
1.346 foxr 324:
1.416 jms 325: A function that takes the resource object as its only parameter and
326: returns a true or false value. If true, the resource is displayed. If
327: false, it is simply skipped in the display.
1.346 foxr 328:
1.416 jms 329: =item * B<suppressEmptySequences>: default: false
1.346 foxr 330:
1.416 jms 331: If you're using a filter function, and displaying sequences to orient
332: the user, then frequently some sequences will be empty. Setting this to
333: true will cause those sequences not to display, so as not to confuse the
334: user into thinking that if the sequence is there there should be things
335: under it; for example, see the "Show Uncompleted Homework" view on the
336: B<NAV> screen.
1.73 bowersj2 337:
1.416 jms 338: =item * B<suppressNavmaps>: default: false
1.53 bowersj2 339:
1.416 jms 340: If true, will not display Navigate Content resources.
1.51 bowersj2 341:
1.416 jms 342: =back
1.133 bowersj2 343:
1.416 jms 344: =head2 Additional Info
1.174 albertel 345:
1.416 jms 346: In addition to the parameters you can pass to the renderer, which will
347: be passed through unchange to the column renderers, the renderer will
348: generate the following information which your renderer may find
349: useful:
1.174 albertel 350:
1.416 jms 351: =over 4
1.174 albertel 352:
1.416 jms 353: =item * B<counter>:
1.133 bowersj2 354:
1.416 jms 355: Contains the number of rows printed. Useful after calling the render
356: function, as you can detect whether anything was printed at all.
1.216 bowersj2 357:
1.416 jms 358: =item * B<isNewBranch>:
1.216 bowersj2 359:
1.416 jms 360: Useful for renderers: If this resource is currently the first resource
361: of a new branch, this will be true. The Resource column (leftmost in the
362: navmaps screen) uses this to display the "new branch" icon
1.216 bowersj2 363:
1.416 jms 364: =back
1.216 bowersj2 365:
1.416 jms 366: =cut
1.216 bowersj2 367:
368:
1.416 jms 369: =head1 SUBROUTINES
1.216 bowersj2 370:
1.416 jms 371: =over
1.216 bowersj2 372:
1.416 jms 373: =item update()
1.133 bowersj2 374:
1.416 jms 375: =item addToFilter()
1.133 bowersj2 376:
1.416 jms 377: Convenience functions: Returns a string that adds or subtracts
378: the second argument from the first hash, appropriate for the
379: query string that determines which folders to recurse on
1.174 albertel 380:
1.416 jms 381: =item removeFromFilter()
1.51 bowersj2 382:
1.416 jms 383: =item getLinkForResource()
1.51 bowersj2 384:
1.416 jms 385: Convenience function: Given a stack returned from getStack on the iterator,
386: return the correct src() value.
1.174 albertel 387:
1.416 jms 388: =item getDescription()
1.174 albertel 389:
1.416 jms 390: Convenience function: This separates the logic of how to create
391: the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
392: etc.) into a separate function. It takes a resource object as the
393: first parameter, and the part number of the resource as the second.
394: It's basically a big switch statement on the status of the resource.
1.174 albertel 395:
1.416 jms 396: =item dueInLessThan24Hours()
1.216 bowersj2 397:
1.416 jms 398: Convenience function, so others can use it: Is the problem due in less than 24 hours, and still can be done?
1.51 bowersj2 399:
1.416 jms 400: =item lastTry()
1.51 bowersj2 401:
1.416 jms 402: Convenience function, so others can use it: Is there only one try remaining for the
403: part, with more than one try to begin with, not due yet and still can be done?
1.51 bowersj2 404:
1.416 jms 405: =item advancedUser()
1.51 bowersj2 406:
1.416 jms 407: This puts a human-readable name on the env variable.
1.51 bowersj2 408:
1.416 jms 409: =item timeToHumanString()
1.51 bowersj2 410:
1.416 jms 411: timeToHumanString takes a time number and converts it to a
412: human-readable representation, meant to be used in the following
413: manner:
1.174 albertel 414:
1.416 jms 415: =over 4
1.51 bowersj2 416:
1.416 jms 417: =item * print "Due $timestring"
1.133 bowersj2 418:
1.416 jms 419: =item * print "Open $timestring"
1.133 bowersj2 420:
1.416 jms 421: =item * print "Answer available $timestring"
1.144 bowersj2 422:
1.133 bowersj2 423: =back
1.51 bowersj2 424:
1.416 jms 425: Very, very, very, VERY English-only... goodness help a localizer on
426: this func...
1.174 albertel 427:
1.417 jms 428: =item resource()
1.174 albertel 429:
1.417 jms 430: returns 0
1.51 bowersj2 431:
1.417 jms 432: =item communication_status()
1.51 bowersj2 433:
1.417 jms 434: returns 1
1.174 albertel 435:
1.417 jms 436: =item quick_status()
1.51 bowersj2 437:
1.417 jms 438: returns 2
1.225 bowersj2 439:
1.417 jms 440: =item long_status()
1.225 bowersj2 441:
1.417 jms 442: returns 3
1.225 bowersj2 443:
1.417 jms 444: =item part_status_summary()
1.51 bowersj2 445:
1.417 jms 446: returns 4
1.51 bowersj2 447:
1.417 jms 448: =item render_resource()
1.51 bowersj2 449:
1.417 jms 450: =item render_communication_status()
1.51 bowersj2 451:
1.417 jms 452: =item render_quick_status()
453:
454: =item render_long_status()
455:
456: =item render_parts_summary_status()
457:
458: =item setDefault()
459:
460: =item cmp_title()
461:
462: =item render()
463:
464: =item add_linkitem()
465:
466: =item show_linkitems()
1.130 www 467:
1.416 jms 468: =back
1.115 bowersj2 469:
1.416 jms 470: =cut
1.140 bowersj2 471:
1.416 jms 472: package Apache::lonnavmaps;
1.51 bowersj2 473:
1.416 jms 474: use strict;
475: use GDBM_File;
476: use Apache::loncommon();
477: use Apache::lonenc();
478: use Apache::lonlocal;
479: use Apache::lonnet;
480: use POSIX qw (floor strftime);
481: use Time::HiRes qw( gettimeofday tv_interval );
482: use LONCAPA;
483: use DateTime();
1.174 albertel 484:
1.416 jms 485: # symbolic constants
486: sub SYMB { return 1; }
487: sub URL { return 2; }
488: sub NOTHING { return 3; }
1.174 albertel 489:
1.416 jms 490: # Some data
1.174 albertel 491:
1.416 jms 492: my $resObj = "Apache::lonnavmaps::resource";
1.174 albertel 493:
1.416 jms 494: # Keep these mappings in sync with lonquickgrades, which uses the colors
495: # instead of the icons.
496: my %statusIconMap =
497: (
498: $resObj->CLOSED => '',
499: $resObj->OPEN => 'navmap.open.gif',
500: $resObj->CORRECT => 'navmap.correct.gif',
501: $resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
502: $resObj->INCORRECT => 'navmap.wrong.gif',
503: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
504: $resObj->ERROR => ''
505: );
1.401 albertel 506:
1.416 jms 507: my %iconAltTags =
508: ( 'navmap.correct.gif' => 'Correct',
509: 'navmap.wrong.gif' => 'Incorrect',
510: 'navmap.open.gif' => 'Open' );
1.401 albertel 511:
1.416 jms 512: # Defines a status->color mapping, null string means don't color
513: my %colormap =
514: ( $resObj->NETWORK_FAILURE => '',
515: $resObj->CORRECT => '',
516: $resObj->EXCUSED => '#3333FF',
517: $resObj->PAST_DUE_ANSWER_LATER => '',
518: $resObj->PAST_DUE_NO_ANSWER => '',
519: $resObj->ANSWER_OPEN => '#006600',
520: $resObj->OPEN_LATER => '',
521: $resObj->TRIES_LEFT => '',
522: $resObj->INCORRECT => '',
523: $resObj->OPEN => '',
524: $resObj->NOTHING_SET => '',
525: $resObj->ATTEMPTED => '',
526: $resObj->ANSWER_SUBMITTED => '',
527: $resObj->PARTIALLY_CORRECT => '#006600'
528: );
529: # And a special case in the nav map; what to do when the assignment
530: # is not yet done and due in less than 24 hours
531: my $hurryUpColor = "#FF0000";
1.174 albertel 532:
1.423.4.1 gci 533: my $future_slots_checked = 0;
534: my $future_slots = 0;
535:
1.416 jms 536: sub close {
537: if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
538: return(<<ENDCLOSE);
539: <script type="text/javascript">
540: window.status='Accessing Nav Control';
541: menu=window.open("/adm/rat/empty.html","loncapanav",
542: "height=600,width=400,scrollbars=1");
543: window.status='Closing Nav Control';
544: menu.close();
545: window.status='Done.';
546: </script>
547: ENDCLOSE
548: }
1.174 albertel 549:
1.416 jms 550: sub update {
551: if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
552: if (!$env{'request.course.id'}) { return ''; }
553: if ($ENV{'REQUEST_URI'}=~m|^/adm/navmaps|) { return ''; }
554: return(<<ENDUPDATE);
555: <form name="navform"></form>
556: <script type="text/javascript">
557: this.document.navform.action='/adm/navmaps#curloc';
558: this.document.navform.target='loncapanav';
559: this.document.navform.submit();
560: </script>
561: ENDUPDATE
562: }
1.174 albertel 563:
1.417 jms 564:
1.416 jms 565: sub addToFilter {
566: my $hashIn = shift;
567: my $addition = shift;
568: my %hash = %$hashIn;
569: $hash{$addition} = 1;
1.174 albertel 570:
1.416 jms 571: return join (",", keys(%hash));
572: }
1.174 albertel 573:
1.416 jms 574: sub removeFromFilter {
575: my $hashIn = shift;
576: my $subtraction = shift;
577: my %hash = %$hashIn;
1.174 albertel 578:
1.416 jms 579: delete $hash{$subtraction};
580: return join(",", keys(%hash));
581: }
1.174 albertel 582:
1.416 jms 583: sub getLinkForResource {
584: my $stack = shift;
585: my $res;
1.174 albertel 586:
1.416 jms 587: # Check to see if there are any pages in the stack
588: foreach $res (@$stack) {
589: if (defined($res)) {
590: my $anchor;
591: if ($res->is_page()) {
592: foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
593: $anchor=&escape($anchor->shown_symb());
594: return ($res->link(),$res->shown_symb(),$anchor);
595: }
596: # in case folder was skipped over as "only sequence"
597: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
598: if ($map=~/\.page$/) {
599: my $url=&Apache::lonnet::clutter($map);
600: $anchor=&escape($src->shown_symb());
601: return ($url,$res->shown_symb(),$anchor);
602: }
603: }
604: }
1.174 albertel 605:
1.416 jms 606: # Failing that, return the src of the last resource that is defined
607: # (when we first recurse on a map, it puts an undefined resource
608: # on the bottom because $self->{HERE} isn't defined yet, and we
609: # want the src for the map anyhow)
610: foreach my $item (@$stack) {
611: if (defined($item)) { $res = $item; }
612: }
1.174 albertel 613:
1.416 jms 614: if ($res) {
615: return ($res->link(),$res->shown_symb());
616: }
617: return;
618: }
1.174 albertel 619:
1.417 jms 620:
1.140 bowersj2 621:
1.416 jms 622: sub getDescription {
623: my $res = shift;
624: my $part = shift;
625: my $status = $res->status($part);
1.92 bowersj2 626:
1.416 jms 627: my $open = $res->opendate($part);
628: my $due = $res->duedate($part);
629: my $answer = $res->answerdate($part);
1.164 bowersj2 630:
1.416 jms 631: if ($status == $res->NETWORK_FAILURE) {
632: return &mt("Having technical difficulties; please check status later");
633: }
634: if ($status == $res->NOTHING_SET) {
635: return &mt("Not currently assigned.");
636: }
637: if ($status == $res->OPEN_LATER) {
638: return &mt("Open ") .timeToHumanString($open,'start');
639: }
1.423.4.1 gci 640: if ($res->simpleStatus($part) == $res->OPEN) {
641: unless (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
642: my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);
643: if ($slot_status == $res->UNKNOWN) {
644: return &mt('Reservation status unknown');
645: } elsif ($slot_status == $res->RESERVED) {
646: return &mt('Reserved - ends [_1]',
647: timeToHumanString($slot_time,'end'));
648: } elsif ($slot_status == $res->RESERVED_LOCATION) {
649: return &mt('Reserved - specific location(s) - ends [_1]',
650: timeToHumanString($slot_time,'end'));
651: } elsif ($slot_status == $res->RESERVED_LATER) {
652: return &mt('Reserved - next open [_1]',
653: timeToHumanString($slot_time,'start'));
654: } elsif ($slot_status == $res->RESERVABLE) {
655: return &mt('Reservable ending [_1]',
656: timeToHumanString($slot_time,'end'));
657: } elsif ($slot_status == $res->RESERVABLE_LATER) {
658: return &mt('Reservable starting [_1]',
659: timeToHumanString($slot_time,'start'));
660: } elsif ($slot_status == $res->NOT_IN_A_SLOT) {
661: return &mt('Reserve a time/place to work');
662: } elsif ($slot_status == $res->NOTRESERVABLE) {
663: return &mt('Reservation not available');
664: } elsif ($slot_status == $res->WAITING_FOR_GRADE) {
665: return &mt('Submission in grading queue');
666: }
667: }
668: }
1.416 jms 669: if ($status == $res->OPEN) {
670: if ($due) {
671: if ($res->is_practice()) {
672: return &mt("Closes ")." " .timeToHumanString($due,'start');
673: } else {
674: return &mt("Due")." " .timeToHumanString($due,'end');
675: }
676: } else {
677: return &mt("Open, no due date");
678: }
679: }
680: if ($status == $res->PAST_DUE_ANSWER_LATER) {
681: return &mt("Answer open")." " .timeToHumanString($answer,'start');
682: }
683: if ($status == $res->PAST_DUE_NO_ANSWER) {
684: if ($res->is_practice()) {
685: return &mt("Closed")." " . timeToHumanString($due,'start');
686: } else {
687: return &mt("Was due")." " . timeToHumanString($due,'end');
688: }
689: }
690: if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
691: && $res->handgrade($part) ne 'yes') {
692: return &mt("Answer available");
693: }
694: if ($status == $res->EXCUSED) {
695: return &mt("Excused by instructor");
696: }
697: if ($status == $res->ATTEMPTED) {
1.423.4.2! gci 698: if ($res->src() eq '/res/gci/gci/internal/submission.problem') {
! 699: return &mt('Question(s) submitted for review');
! 700: } else {
! 701: return &mt("Answer submitted, not yet graded");
! 702: }
1.416 jms 703: }
704: if ($status == $res->TRIES_LEFT) {
705: my $tries = $res->tries($part);
706: my $maxtries = $res->maxtries($part);
707: my $triesString = "";
708: if ($tries && $maxtries) {
1.422 raeburn 709: $triesString = '<font size="-1"><i>('.&mt('[_1] of [quant,_2,try,tries] used',$tries,$maxtries).')</i></font>';
1.416 jms 710: if ($maxtries > 1 && $maxtries - $tries == 1) {
711: $triesString = "<b>$triesString</b>";
712: }
713: }
714: if ($due) {
715: return &mt("Due")." " . timeToHumanString($due,'end') .
716: " $triesString";
717: } else {
718: return &mt("No due date")." $triesString";
719: }
720: }
721: if ($status == $res->ANSWER_SUBMITTED) {
1.423.4.2! gci 722: if ($res->src() eq '/res/gci/gci/internal/submission.problem') {
! 723: return &mt('Question(s) submitted for review');
! 724: } else {
! 725: return &mt('Answer submitted');
! 726: }
1.416 jms 727: }
728: }
1.92 bowersj2 729:
1.51 bowersj2 730:
1.416 jms 731: sub dueInLessThan24Hours {
732: my $res = shift;
733: my $part = shift;
734: my $status = $res->status($part);
1.55 bowersj2 735:
1.416 jms 736: return ($status == $res->OPEN() ||
737: $status == $res->TRIES_LEFT()) &&
738: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
739: $res->duedate($part) > time();
740: }
1.84 bowersj2 741:
1.417 jms 742:
1.416 jms 743: sub lastTry {
744: my $res = shift;
745: my $part = shift;
1.115 bowersj2 746:
1.416 jms 747: my $tries = $res->tries($part);
748: my $maxtries = $res->maxtries($part);
749: return $tries && $maxtries && $maxtries > 1 &&
750: $maxtries - $tries == 1 && $res->duedate($part) &&
751: $res->duedate($part) > time();
752: }
1.55 bowersj2 753:
1.51 bowersj2 754:
1.416 jms 755: sub advancedUser {
756: return $env{'request.role.adv'};
757: }
1.51 bowersj2 758:
1.416 jms 759: sub timeToHumanString {
760: my ($time,$type,$format) = @_;
1.153 bowersj2 761:
1.416 jms 762: # zero, '0' and blank are bad times
763: if (!$time) {
764: return &mt('never');
765: }
766: unless (&Apache::lonlocal::current_language()=~/^en/) {
767: return &Apache::lonlocal::locallocaltime($time);
768: }
769: my $now = time();
1.174 albertel 770:
1.416 jms 771: # Positive = future
772: my $delta = $time - $now;
1.190 bowersj2 773:
1.416 jms 774: my $minute = 60;
775: my $hour = 60 * $minute;
776: my $day = 24 * $hour;
777: my $week = 7 * $day;
778: my $inPast = 0;
1.190 bowersj2 779:
1.416 jms 780: # Logic in comments:
781: # Is it now? (extremely unlikely)
782: if ( $delta == 0 ) {
783: return "this instant";
784: }
1.174 albertel 785:
1.416 jms 786: if ($delta < 0) {
787: $inPast = 1;
788: $delta = -$delta;
789: }
1.143 bowersj2 790:
1.416 jms 791: if ( $delta > 0 ) {
1.51 bowersj2 792:
1.416 jms 793: my $tense = $inPast ? " ago" : "";
794: my $prefix = $inPast ? "" : "in ";
795:
796: # Less than a minute
797: if ( $delta < $minute ) {
798: if ($delta == 1) { return "${prefix}1 second$tense"; }
799: return "$prefix$delta seconds$tense";
800: }
1.51 bowersj2 801:
1.416 jms 802: # Less than an hour
803: if ( $delta < $hour ) {
804: # If so, use minutes
805: my $minutes = floor($delta / 60);
806: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
807: return "$prefix$minutes minutes$tense";
808: }
809:
810: # Is it less than 24 hours away? If so,
811: # display hours + minutes
812: if ( $delta < $hour * 24) {
813: my $hours = floor($delta / $hour);
814: my $minutes = floor(($delta % $hour) / $minute);
815: my $hourString = "$hours hours";
816: my $minuteString = ", $minutes minutes";
817: if ($hours == 1) {
818: $hourString = "1 hour";
819: }
820: if ($minutes == 1) {
821: $minuteString = ", 1 minute";
822: }
823: if ($minutes == 0) {
824: $minuteString = "";
825: }
826: return "$prefix$hourString$minuteString$tense";
827: }
1.174 albertel 828:
1.416 jms 829: my $dt = DateTime->from_epoch(epoch => $time)
830: ->set_time_zone(&Apache::lonlocal::gettimezone());
1.216 bowersj2 831:
1.416 jms 832: # If there's a caller supplied format, use it.
1.145 bowersj2 833:
1.416 jms 834: if ($format ne '') {
835: my $timeStr = $dt->strftime($format);
836: return $timeStr.' ('.$dt->time_zone_short_name().')';
837: }
1.216 bowersj2 838:
1.416 jms 839: # Less than 5 days away, display day of the week and
840: # HH:MM
1.216 bowersj2 841:
1.416 jms 842: if ( $delta < $day * 5 ) {
843: my $timeStr = $dt->strftime("%A, %b %e at %I:%M %P (%Z)");
844: $timeStr =~ s/12:00 am/00:00/;
845: $timeStr =~ s/12:00 pm/noon/;
846: return ($inPast ? "last " : "this ") .
847: $timeStr;
848: }
849:
850: my $conjunction='on';
851: if ($type eq 'start') {
852: $conjunction='at';
853: } elsif ($type eq 'end') {
854: $conjunction='by';
855: }
856: # Is it this year?
857: my $dt_now = DateTime->from_epoch(epoch => $now)
858: ->set_time_zone(&Apache::lonlocal::gettimezone());
859: if ( $dt->year() == $dt_now->year()) {
860: # Return on Month Day, HH:MM meridian
861: my $timeStr = $dt->strftime("$conjunction %A, %b %e at %I:%M %P (%Z)");
862: $timeStr =~ s/12:00 am/00:00/;
863: $timeStr =~ s/12:00 pm/noon/;
864: return $timeStr;
865: }
1.59 bowersj2 866:
1.416 jms 867: # Not this year, so show the year
868: my $timeStr =
869: $dt->strftime("$conjunction %A, %b %e %Y at %I:%M %P (%Z)");
870: $timeStr =~ s/12:00 am/00:00/;
871: $timeStr =~ s/12:00 pm/noon/;
872: return $timeStr;
873: }
874: }
1.59 bowersj2 875:
876:
1.133 bowersj2 877: sub resource { return 0; }
878: sub communication_status { return 1; }
879: sub quick_status { return 2; }
880: sub long_status { return 3; }
1.225 bowersj2 881: sub part_status_summary { return 4; }
1.51 bowersj2 882:
1.133 bowersj2 883: sub render_resource {
884: my ($resource, $part, $params) = @_;
1.51 bowersj2 885:
1.133 bowersj2 886: my $nonLinkedText = ''; # stuff after resource title not in link
1.51 bowersj2 887:
1.134 bowersj2 888: my $link = $params->{"resourceLink"};
1.306 foxr 889:
890: # The URL part is not escaped at this point, but the symb is...
891: # The stuff to the left of the ? must have ' replaced by \' since
892: # it will be quoted with ' in the href.
893:
894: my ($left,$right) = split(/\?/, $link);
895: $link = $left.'?'.$right;
896:
1.134 bowersj2 897: my $src = $resource->src();
898: my $it = $params->{"iterator"};
1.133 bowersj2 899: my $filter = $it->{FILTER};
900:
901: my $title = $resource->compTitle();
1.258 albertel 902:
1.133 bowersj2 903: my $partLabel = "";
904: my $newBranchText = "";
1.298 albertel 905: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
1.133 bowersj2 906: # If this is a new branch, label it so
907: if ($params->{'isNewBranch'}) {
1.423.4.1 gci 908: $newBranchText = '<img src="'.$location.'/branch.gif" border="0" alt="'.
909: &mt('Branch').'" />';
1.51 bowersj2 910: }
911:
1.133 bowersj2 912: # links to open and close the folder
1.306 foxr 913:
914:
1.349 foxr 915: my $linkopen = "<a href=\"$link\">";
1.306 foxr 916:
917:
1.133 bowersj2 918: my $linkclose = "</a>";
1.51 bowersj2 919:
1.204 albertel 920: # Default icon: unknown page
1.329 albertel 921: my $icon = "<img src='$location/unknown.gif' alt='' border='0' alt=' ' ' />";
1.133 bowersj2 922:
923: if ($resource->is_problem()) {
1.192 bowersj2 924: if ($part eq '0' || $params->{'condensed'}) {
1.389 albertel 925: $icon = '<img src="'.$location.'/';
926: if ($resource->is_task()) {
927: $icon .= 'task.gif" alt="'.&mt('Task');
928: } else {
929: $icon .= 'problem.gif" alt="'.&mt('Problem');
930: }
931: $icon .='" border="0" />';
1.133 bowersj2 932: } else {
933: $icon = $params->{'indentString'};
934: }
1.204 albertel 935: } else {
1.329 albertel 936: $icon = "<img src='".&Apache::loncommon::icon($resource->src)."' alt=' ' border='0' />";
1.133 bowersj2 937: }
1.51 bowersj2 938:
1.133 bowersj2 939: # Display the correct map icon to open or shut map
940: if ($resource->is_map()) {
941: my $mapId = $resource->map_pc();
942: my $nowOpen = !defined($filter->{$mapId});
943: if ($it->{CONDITION}) {
944: $nowOpen = !$nowOpen;
945: }
1.144 bowersj2 946:
1.205 bowersj2 947: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1.362 www 948: my $title=$resource->title;
1.363 albertel 949: $title=~s/\"/\"/g;
1.144 bowersj2 950: if (!$params->{'resource_no_folder_link'}) {
1.205 bowersj2 951: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.363 albertel 952: $icon = "<img src='$location/$icon' alt=\"".
953: ($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";
1.144 bowersj2 954:
1.349 foxr 955: $linkopen = "<a href=\"" . $params->{'url'} . '?' .
1.392 albertel 956: $params->{'queryString'} . '&filter=';
1.144 bowersj2 957: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
958: addToFilter($filter, $mapId) :
959: removeFromFilter($filter, $mapId);
1.392 albertel 960: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
961: . $params->{'hereType'} . '&here=' .
1.384 www 962: &escape($params->{'here'}) .
1.392 albertel 963: '&jump=' .
1.384 www 964: &escape($resource->symb()) .
1.392 albertel 965: "&folderManip=1\">";
1.306 foxr 966:
1.144 bowersj2 967: } else {
968: # Don't allow users to manipulate folder
1.205 bowersj2 969: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .
1.144 bowersj2 970: '.nomanip.gif';
1.364 www 971: $icon = "<img src='$location/$icon' alt=\"".
972: ($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";
1.144 bowersj2 973:
974: $linkopen = "";
975: $linkclose = "";
976: }
1.133 bowersj2 977: }
1.51 bowersj2 978:
1.133 bowersj2 979: if ($resource->randomout()) {
1.362 www 980: $nonLinkedText .= ' <i>('.&mt('hidden').')</i> ';
1.133 bowersj2 981: }
1.342 albertel 982: if (!$resource->condval()) {
1.362 www 983: $nonLinkedText .= ' <i>('.&mt('conditionally hidden').')</i> ';
1.342 albertel 984: }
1.413 www 985: if (($resource->is_practice()) && ($resource->is_raw_problem())) {
1.412 www 986: $nonLinkedText .=' <font color="green"><b>'.&mt('not graded').'</b></font>';
987: }
988:
1.133 bowersj2 989: # We're done preparing and finally ready to start the rendering
1.392 albertel 990: my $result = "<td align='left' valign='middle'>";
1.140 bowersj2 991:
992: my $indentLevel = $params->{'indentLevel'};
993: if ($newBranchText) { $indentLevel--; }
994:
1.133 bowersj2 995: # print indentation
1.140 bowersj2 996: for (my $i = 0; $i < $indentLevel; $i++) {
1.133 bowersj2 997: $result .= $params->{'indentString'};
1.84 bowersj2 998: }
999:
1.133 bowersj2 1000: # Decide what to display
1.306 foxr 1001:
1.133 bowersj2 1002: $result .= "$newBranchText$linkopen$icon$linkclose";
1003:
1004: my $curMarkerBegin = '';
1005: my $curMarkerEnd = '';
1.51 bowersj2 1006:
1.133 bowersj2 1007: # Is this the current resource?
1.158 bowersj2 1008: if (!$params->{'displayedHereMarker'} &&
1009: $resource->symb() eq $params->{'here'} ) {
1.419 tempelho 1010: $curMarkerBegin = '<span class="LC_fontcolor_red LC_fontsize_large">></span>';
1011: $curMarkerEnd = '<span class="LC_fontcolor_red LC_fontsize_large"><</span>';
1.158 bowersj2 1012: $params->{'displayedHereMarker'} = 1;
1.51 bowersj2 1013: }
1014:
1.192 bowersj2 1015: if ($resource->is_problem() && $part ne '0' &&
1.133 bowersj2 1016: !$params->{'condensed'}) {
1.274 matthew 1017: my $displaypart=$resource->part_display($part);
1.363 albertel 1018: $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
1.384 www 1019: if ($link!~/\#/) { $link.='#'.&escape($part); }
1.133 bowersj2 1020: $title = "";
1.51 bowersj2 1021: }
1022:
1.163 bowersj2 1023: if ($params->{'condensed'} && $resource->countParts() > 1) {
1.363 albertel 1024: $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
1.51 bowersj2 1025: }
1026:
1.268 albertel 1027: my $target;
1.320 albertel 1028: if ($env{'environment.remotenavmap'} eq 'on') {
1.268 albertel 1029: $target=' target="loncapaclient" ';
1030: }
1.266 raeburn 1031: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1.349 foxr 1032: $result .= " $curMarkerBegin<a $target href=\"$link\">$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
1.144 bowersj2 1033: } else {
1034: $result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";
1035: }
1.51 bowersj2 1036:
1.133 bowersj2 1037: return $result;
1038: }
1.51 bowersj2 1039:
1.133 bowersj2 1040: sub render_communication_status {
1041: my ($resource, $part, $params) = @_;
1.134 bowersj2 1042: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1043:
1044: my $link = $params->{"resourceLink"};
1.335 albertel 1045: my $target;
1046: if ($env{'environment.remotenavmap'} eq 'on') {
1047: $target=' target="loncapaclient" ';
1048: }
1.349 foxr 1049: my $linkopen = "<a $target href=\"$link\">";
1.134 bowersj2 1050: my $linkclose = "</a>";
1.298 albertel 1051: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.134 bowersj2 1052: if ($resource->hasDiscussion()) {
1053: $discussionHTML = $linkopen .
1.392 albertel 1054: '<img alt="'.&mt('New Discussion').'" border="0" src="'.$location.'/chat.gif" />' .
1.134 bowersj2 1055: $linkclose;
1056: }
1057:
1058: if ($resource->getFeedback()) {
1059: my $feedback = $resource->getFeedback();
1.394 raeburn 1060: foreach my $msgid (split(/\,/, $feedback)) {
1061: if ($msgid) {
1.335 albertel 1062: $feedbackHTML .= ' <a '.$target.' href="/adm/email?display='
1.394 raeburn 1063: . &escape($msgid) . '">'
1.420 schafran 1064: . '<img alt="'.&mt('New E-mail').'" src="'.$location.'/feedback.gif" '
1.134 bowersj2 1065: . 'border="0" /></a>';
1066: }
1067: }
1068: }
1069:
1070: if ($resource->getErrors()) {
1071: my $errors = $resource->getErrors();
1.254 matthew 1072: my $errorcount = 0;
1.394 raeburn 1073: foreach my $msgid (split(/,/, $errors)) {
1.254 matthew 1074: last if ($errorcount>=10); # Only output 10 bombs maximum
1.394 raeburn 1075: if ($msgid) {
1.254 matthew 1076: $errorcount++;
1.335 albertel 1077: $errorHTML .= ' <a '.$target.' href="/adm/email?display='
1.394 raeburn 1078: . &escape($msgid) . '">'
1.392 albertel 1079: . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" '
1.134 bowersj2 1080: . 'border="0" /></a>';
1081: }
1082: }
1.197 bowersj2 1083: }
1084:
1085: if ($params->{'multipart'} && $part != '0') {
1086: $discussionHTML = $feedbackHTML = $errorHTML = '';
1.134 bowersj2 1087: }
1088:
1.392 albertel 1089: return "<td width=\"75\" align=\"left\" valign=\"middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
1.134 bowersj2 1090:
1.133 bowersj2 1091: }
1092: sub render_quick_status {
1093: my ($resource, $part, $params) = @_;
1.135 bowersj2 1094: my $result = "";
1095: my $firstDisplayed = !$params->{'condensed'} &&
1096: $params->{'multipart'} && $part eq "0";
1097:
1098: my $link = $params->{"resourceLink"};
1.335 albertel 1099: my $target;
1100: if ($env{'environment.remotenavmap'} eq 'on') {
1101: $target=' target="loncapaclient" ';
1102: }
1.349 foxr 1103: my $linkopen = "<a $target href=\"$link\">";
1.135 bowersj2 1104: my $linkclose = "</a>";
1105:
1106: if ($resource->is_problem() &&
1107: !$firstDisplayed) {
1.224 bowersj2 1108:
1109: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1.135 bowersj2 1110: my $alt = $iconAltTags{$icon};
1111: if ($icon) {
1.298 albertel 1112: my $location=
1113: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1.392 albertel 1114: $result .= "<td valign='middle' width='50' align='right'>$linkopen<img width='25' height='25' src='$location' border='0' alt='$alt' />$linkclose</td>\n";
1.135 bowersj2 1115: } else {
1116: $result .= "<td width='30'> </td>\n";
1117: }
1118: } else { # not problem, no icon
1119: $result .= "<td width='30'> </td>\n";
1120: }
1121:
1122: return $result;
1.133 bowersj2 1123: }
1124: sub render_long_status {
1125: my ($resource, $part, $params) = @_;
1.392 albertel 1126: my $result = "<td align='right' valign='middle'>\n";
1.136 bowersj2 1127: my $firstDisplayed = !$params->{'condensed'} &&
1128: $params->{'multipart'} && $part eq "0";
1129:
1130: my $color;
1.402 albertel 1131: if ($resource->is_problem() || $resource->is_practice()) {
1.136 bowersj2 1132: $color = $colormap{$resource->status};
1133:
1.252 matthew 1134: if (dueInLessThan24Hours($resource, $part) ||
1.136 bowersj2 1135: lastTry($resource, $part)) {
1136: $color = $hurryUpColor;
1137: }
1138: }
1139:
1140: if ($resource->kind() eq "res" &&
1.402 albertel 1141: ($resource->is_problem() || $resource->is_practice()) &&
1.136 bowersj2 1142: !$firstDisplayed) {
1143: if ($color) {$result .= "<font color=\"$color\"><b>"; }
1144: $result .= getDescription($resource, $part);
1145: if ($color) {$result .= "</b></font>"; }
1146: }
1.402 albertel 1147: if ($resource->is_map() && &advancedUser() && $resource->randompick()) {
1.400 albertel 1148: $result .= &mt('(randomly select [_1])', $resource->randompick());
1149: }
1150: if ($resource->is_map() && &advancedUser() && $resource->randomorder()) {
1151: $result .= &mt('(randomly ordered)');
1.136 bowersj2 1152: }
1.210 bowersj2 1153:
1.213 bowersj2 1154: # Debugging code
1155: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1156: # ' - Part: ' . $part;
1157:
1.210 bowersj2 1158: $result .= "</td>\n";
1.136 bowersj2 1159:
1160: return $result;
1.51 bowersj2 1161: }
1162:
1.227 bowersj2 1163: # Colors obtained by taking the icons, matching the colors, and
1164: # possibly reducing the Value (HSV) of the color, if it's too bright
1165: # for text, generally by one third or so.
1.225 bowersj2 1166: my %statusColors =
1167: (
1168: $resObj->CLOSED => '#000000',
1.227 bowersj2 1169: $resObj->OPEN => '#998b13',
1170: $resObj->CORRECT => '#26933f',
1171: $resObj->INCORRECT => '#c48207',
1172: $resObj->ATTEMPTED => '#a87510',
1.225 bowersj2 1173: $resObj->ERROR => '#000000'
1174: );
1175: my %statusStrings =
1176: (
1177: $resObj->CLOSED => 'Not yet open',
1178: $resObj->OPEN => 'Open',
1179: $resObj->CORRECT => 'Correct',
1180: $resObj->INCORRECT => 'Incorrect',
1181: $resObj->ATTEMPTED => 'Attempted',
1182: $resObj->ERROR => 'Network Error'
1183: );
1184: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1185:
1186: sub render_parts_summary_status {
1187: my ($resource, $part, $params) = @_;
1.256 albertel 1188: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1.225 bowersj2 1189: if ($params->{showParts}) {
1190: return '<td></td>';
1191: }
1192:
1193: my $td = "<td align='right'>\n";
1194: my $endtd = "</td>\n";
1.256 albertel 1195: my @probs;
1.225 bowersj2 1196:
1.256 albertel 1197: if ($resource->contains_problem) {
1198: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1199: } else {
1200: @probs=($resource);
1201: }
1202: my $return;
1203: my %overallstatus;
1204: my $totalParts;
1205: foreach my $resource (@probs) {
1206: # If there is a single part, just show the simple status
1207: if ($resource->singlepart()) {
1208: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1209: $overallstatus{$status}++;
1210: $totalParts++;
1211: next;
1212: }
1213: # Now we can be sure the $part doesn't really matter.
1214: my $statusCount = $resource->simpleStatusCount();
1215: my @counts;
1216: foreach my $status (@statuses) {
1217: # decouple display order from the simpleStatusCount order
1218: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1219: if ($statusCount->[$slot]) {
1220: $overallstatus{$status}+=$statusCount->[$slot];
1221: $totalParts+=$statusCount->[$slot];
1222: }
1223: }
1224: }
1225: $return.= $td . $totalParts . ' parts: ';
1226: foreach my $status (@statuses) {
1227: if ($overallstatus{$status}) {
1228: $return.="<font color='" . $statusColors{$status} .
1229: "'>" . $overallstatus{$status} . ' '
1.225 bowersj2 1230: . $statusStrings{$status} . "</font>";
1231: }
1232: }
1.256 albertel 1233: $return.= $endtd;
1234: return $return;
1.225 bowersj2 1235: }
1236:
1.133 bowersj2 1237: my @preparedColumns = (\&render_resource, \&render_communication_status,
1.225 bowersj2 1238: \&render_quick_status, \&render_long_status,
1239: \&render_parts_summary_status);
1.132 bowersj2 1240:
1241: sub setDefault {
1242: my ($val, $default) = @_;
1243: if (!defined($val)) { return $default; }
1244: return $val;
1245: }
1246:
1.296 albertel 1247: sub cmp_title {
1248: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1249: $atitle=~s/^\s*//;
1250: $btitle=~s/^\s*//;
1251: return $atitle cmp $btitle;
1252: }
1253:
1.132 bowersj2 1254: sub render {
1255: my $args = shift;
1.140 bowersj2 1256: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1257: my $result = '';
1.132 bowersj2 1258: # Configure the renderer.
1259: my $cols = $args->{'cols'};
1260: if (!defined($cols)) {
1261: # no columns, no nav maps.
1262: return '';
1263: }
1.140 bowersj2 1264: my $navmap;
1265: if (defined($args->{'navmap'})) {
1266: $navmap = $args->{'navmap'};
1267: }
1268:
1.158 bowersj2 1269: my $r = $args->{'r'};
1.140 bowersj2 1270: my $queryString = $args->{'queryString'};
1.159 bowersj2 1271: my $jump = $args->{'jump'};
1.158 bowersj2 1272: my $here = $args->{'here'};
1.153 bowersj2 1273: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1.256 albertel 1274: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1.140 bowersj2 1275: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1276: # before the current resource when using #current
1277:
1278: # If we were passed 'here' information, we are not rendering
1279: # after a folder manipulation, and we were not passed an
1280: # iterator, make sure we open the folders to show the "here"
1281: # marker
1282: my $filterHash = {};
1283: # Figure out what we're not displaying
1.394 raeburn 1284: foreach my $item (split(/\,/, $env{"form.filter"})) {
1285: if ($item) {
1286: $filterHash->{$item} = "1";
1.140 bowersj2 1287: }
1288: }
1289:
1.191 bowersj2 1290: # Filter: Remember filter function and add our own filter: Refuse
1291: # to show hidden resources unless the user can see them.
1292: my $userCanSeeHidden = advancedUser();
1293: my $filterFunc = setDefault($args->{'filterFunc'},
1294: sub {return 1;});
1295: if (!$userCanSeeHidden) {
1296: # Without renaming the filterfunc, the server seems to go into
1297: # an infinite loop
1298: my $oldFilterFunc = $filterFunc;
1299: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1300: &$oldFilterFunc($res);};
1301: }
1302:
1.140 bowersj2 1303: my $condition = 0;
1.320 albertel 1304: if ($env{'form.condition'}) {
1.140 bowersj2 1305: $condition = 1;
1306: }
1307:
1.320 albertel 1308: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1.140 bowersj2 1309: # Step 1: Check to see if we have a navmap
1310: if (!defined($navmap)) {
1.221 bowersj2 1311: $navmap = Apache::lonnavmaps::navmap->new();
1.340 albertel 1312: if (!defined($navmap)) {
1.423 raeburn 1313: # no longer in course
1.388 albertel 1314: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1.362 www 1315: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1.340 albertel 1316: }
1317: }
1.140 bowersj2 1318:
1319: # Step two: Locate what kind of here marker is necessary
1320: # Determine where the "here" marker is and where the screen jumps to.
1321:
1.332 albertel 1322: if ($env{'form.postsymb'} ne '') {
1.320 albertel 1323: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1.332 albertel 1324: } elsif ($env{'form.postdata'} ne '') {
1.140 bowersj2 1325: # couldn't find a symb, is there a URL?
1.320 albertel 1326: my $currenturl = $env{'form.postdata'};
1.158 bowersj2 1327: #$currenturl=~s/^http\:\/\///;
1328: #$currenturl=~s/^[^\/]+//;
1.140 bowersj2 1329:
1.158 bowersj2 1330: $here = $jump = &Apache::lonnet::symbread($currenturl);
1.331 albertel 1331: }
1332: if ($here eq '') {
1.317 albertel 1333: my $last;
1.320 albertel 1334: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1.317 albertel 1335: &GDBM_READER(),0640)) {
1336: $last=$hash{'last_known'};
1337: untie(%hash);
1338: }
1339: if ($last) { $here = $jump = $last; }
1340: }
1.158 bowersj2 1341:
1.140 bowersj2 1342: # Step three: Ensure the folders are open
1343: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 1344: my $curRes;
1.140 bowersj2 1345: my $found = 0;
1346:
1347: # We only need to do this if we need to open the maps to show the
1348: # current position. This will change the counter so we can't count
1349: # for the jump marker with this loop.
1.294 albertel 1350: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1.158 bowersj2 1351: if (ref($curRes) && $curRes->symb() eq $here) {
1.140 bowersj2 1352: my $mapStack = $mapIterator->getStack();
1353:
1354: # Ensure the parent maps are open
1355: for my $map (@{$mapStack}) {
1356: if ($condition) {
1357: undef $filterHash->{$map->map_pc()};
1358: } else {
1359: $filterHash->{$map->map_pc()} = 1;
1360: }
1361: }
1362: $found = 1;
1363: }
1364: }
1.159 bowersj2 1365: }
1.140 bowersj2 1366:
1.320 albertel 1367: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1.140 bowersj2 1368: # If this is a click on a folder or something, we want to preserve the "here"
1369: # from the querystring, and get the new "jump" marker
1.320 albertel 1370: $here = $env{'form.here'};
1371: $jump = $env{'form.jump'};
1.140 bowersj2 1372: }
1373:
1.132 bowersj2 1374: my $it = $args->{'iterator'};
1375: if (!defined($it)) {
1.320 albertel 1376: # Construct a default iterator based on $env{'form.'} information
1.140 bowersj2 1377:
1378: # Step 1: Check to see if we have a navmap
1379: if (!defined($navmap)) {
1.221 bowersj2 1380: $navmap = Apache::lonnavmaps::navmap->new();
1.423 raeburn 1381: if (!defined($navmap)) {
1382: # no longer in course
1383: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1384: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1385: }
1.140 bowersj2 1386: }
1387:
1.144 bowersj2 1388: # See if we're being passed a specific map
1389: if ($args->{'iterator_map'}) {
1390: my $map = $args->{'iterator_map'};
1.145 bowersj2 1391: $map = $navmap->getResourceByUrl($map);
1.144 bowersj2 1392: my $firstResource = $map->map_start();
1393: my $finishResource = $map->map_finish();
1394:
1395: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1396: } else {
1.401 albertel 1397: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
1.144 bowersj2 1398: }
1.132 bowersj2 1399: }
1.256 albertel 1400:
1.159 bowersj2 1401: # (re-)Locate the jump point, if any
1.191 bowersj2 1402: # Note this does not take filtering or hidden into account... need
1403: # to be fixed?
1.159 bowersj2 1404: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1.222 bowersj2 1405: my $curRes;
1.159 bowersj2 1406: my $foundJump = 0;
1407: my $counter = 0;
1408:
1.222 bowersj2 1409: while (($curRes = $mapIterator->next()) && !$foundJump) {
1.159 bowersj2 1410: if (ref($curRes)) { $counter++; }
1411:
1412: if (ref($curRes) && $jump eq $curRes->symb()) {
1413:
1414: # This is why we have to use the main iterator instead of the
1415: # potentially faster DFS: The count has to be the same, so
1416: # the order has to be the same, which DFS won't give us.
1417: $args->{'currentJumpIndex'} = $counter;
1418: $foundJump = 1;
1419: }
1420: }
1421:
1.132 bowersj2 1422: my $showParts = setDefault($args->{'showParts'}, 1);
1423: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1.139 bowersj2 1424: # keeps track of when the current resource is found,
1425: # so we can back up a few and put the anchor above the
1426: # current resource
1.140 bowersj2 1427: my $printKey = $args->{'printKey'};
1428: my $printCloseAll = $args->{'printCloseAll'};
1429: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1.298 albertel 1430:
1.140 bowersj2 1431: # Print key?
1432: if ($printKey) {
1433: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1434: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1.298 albertel 1435: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.140 bowersj2 1436: if ($navmap->{LAST_CHECK}) {
1437: $result .=
1.423.4.1 gci 1438: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('New discussion since').' '.
1.140 bowersj2 1439: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1440: '</td><td align="center" valign="bottom"> '.
1.423.4.1 gci 1441: '<img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').'<p>'.
1.140 bowersj2 1442: '</td>';
1443: } else {
1444: $result .= '<td align="center" valign="bottom"> '.
1.423.4.1 gci 1445: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1446: ' <img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').
1.140 bowersj2 1447: '</td>';
1448: }
1449:
1450: $result .= '</tr></table>';
1451: }
1452:
1.172 bowersj2 1453: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1.281 albertel 1454: my ($link,$text);
1.140 bowersj2 1455: if ($condition) {
1.392 albertel 1456: $link='"navmaps?condition=0&filter=&'.$queryString.
1.384 www 1457: '&here='.&escape($here).'"';
1.377 www 1458: $text='Close all folders';
1.140 bowersj2 1459: } else {
1.392 albertel 1460: $link='"navmaps?condition=1&filter=&'.$queryString.
1.384 www 1461: '&here='.&escape($here).'"';
1.377 www 1462: $text='Open all folders';
1.281 albertel 1463: }
1464: if ($args->{'caller'} eq 'navmapsdisplay') {
1465: &add_linkitem($args->{'linkitems'},'changefolder',
1466: 'location.href='.$link,$text);
1467: } else {
1468: $result.='<a href='.$link.'>'.&mt($text).'</a>';
1469: }
1.266 raeburn 1470: $result .= "\n";
1471: }
1.140 bowersj2 1472:
1.266 raeburn 1473: # Check for any unread discussions in all resources.
1.281 albertel 1474: if ($args->{'caller'} eq 'navmapsdisplay') {
1.296 albertel 1475: &add_linkitem($args->{'linkitems'},'clearbubbles',
1476: 'document.clearbubbles.submit()',
1477: 'Mark all posts read');
1.297 albertel 1478: my $time=time;
1.296 albertel 1479: $result .= (<<END);
1480: <form name="clearbubbles" method="post" action="/adm/feedback">
1481: <input type="hidden" name="navurl" value="$ENV{'QUERY_STRING'}" />
1.297 albertel 1482: <input type="hidden" name="navtime" value="$time" />
1.296 albertel 1483: END
1484: if ($args->{'sort'} eq 'discussion') {
1485: my $totdisc = 0;
1486: my $haveDisc = '';
1487: my @allres=$navmap->retrieveResources();
1488: foreach my $resource (@allres) {
1489: if ($resource->hasDiscussion()) {
1.323 albertel 1490: $haveDisc .= $resource->wrap_symb().':';
1.296 albertel 1491: $totdisc ++;
1.267 albertel 1492: }
1493: }
1.296 albertel 1494: if ($totdisc > 0) {
1495: $haveDisc =~ s/:$//;
1496: $result .= (<<END);
1497: <input type="hidden" name="navmaps" value="$haveDisc" />
1498: </form>
1499: END
1500: }
1.297 albertel 1501: }
1502: $result.='</form>';
1.266 raeburn 1503: }
1.276 albertel 1504:
1.281 albertel 1505: if ($args->{'caller'} eq 'navmapsdisplay') {
1.283 raeburn 1506: $result .= '<table><tr><td>'.
1.388 albertel 1507: &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',undef,'RAT').'</td>';
1.320 albertel 1508: if ($env{'environment.remotenavmap'} ne 'on') {
1.283 raeburn 1509: $result .= '<td> </td>';
1510: } else {
1511: $result .= '</tr><tr>';
1512: }
1.281 albertel 1513: $result.=&show_linkitems($args->{'linkitems'});
1514: if ($args->{'sort_html'}) {
1.320 albertel 1515: if ($env{'environment.remotenavmap'} ne 'on') {
1.281 albertel 1516: $result.='<td> </td><td> </td><td> </td>'.
1517: '<td align="right">'.$args->{'sort_html'}.'</td></tr>';
1518: } else {
1519: $result.='</tr><tr><td align="left"><br />'.
1520: $args->{'sort_html'}.'</td></tr>';
1521: }
1522: }
1523: $result .= '</table>';
1524: } elsif ($args->{'sort_html'}) {
1525: $result.=$args->{'sort_html'};
1526: }
1.276 albertel 1527:
1.266 raeburn 1528: $result .= "<br />\n";
1.140 bowersj2 1529: if ($r) {
1530: $r->print($result);
1531: $r->rflush();
1532: $result = "";
1533: }
1.132 bowersj2 1534: # End parameter setting
1.133 bowersj2 1535:
1.132 bowersj2 1536: # Data
1.140 bowersj2 1537: $result .= '<table cellspacing="0" cellpadding="3" border="0" bgcolor="#FFFFFF">' ."\n";
1.132 bowersj2 1538: my $res = "Apache::lonnavmaps::resource";
1539: my %condenseStatuses =
1540: ( $res->NETWORK_FAILURE => 1,
1541: $res->NOTHING_SET => 1,
1542: $res->CORRECT => 1 );
1543: my @backgroundColors = ("#FFFFFF", "#F6F6F6");
1.133 bowersj2 1544:
1545: # Shared variables
1546: $args->{'counter'} = 0; # counts the rows
1547: $args->{'indentLevel'} = 0;
1548: $args->{'isNewBranch'} = 0;
1549: $args->{'condensed'} = 0;
1.298 albertel 1550: my $location=
1551: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace1.gif");
1.329 albertel 1552: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' width='25' height='1' alt=' ' border='0' />");
1.133 bowersj2 1553: $args->{'displayedHereMarker'} = 0;
1.132 bowersj2 1554:
1.190 bowersj2 1555: # If we're suppressing empty sequences, look for them here. Use DFS for speed,
1556: # since structure actually doesn't matter, except what map has what resources.
1557: if ($args->{'suppressEmptySequences'}) {
1558: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1559: $it->{FIRST_RESOURCE},
1560: $it->{FINISH_RESOURCE},
1561: {}, undef, 1);
1.222 bowersj2 1562: my $depth = 0;
1.190 bowersj2 1563: $dfsit->next();
1564: my $curRes = $dfsit->next();
1565: while ($depth > -1) {
1566: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1567: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1568:
1569: if (ref($curRes)) {
1570: # Parallel pre-processing: Do sequences have non-filtered-out children?
1.201 bowersj2 1571: if ($curRes->is_map()) {
1.190 bowersj2 1572: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1573: # Sequences themselves do not count as visible children,
1574: # unless those sequences also have visible children.
1575: # This means if a sequence appears, there's a "promise"
1576: # that there's something under it if you open it, somewhere.
1577: } else {
1578: # Not a sequence: if it's filtered, ignore it, otherwise
1579: # rise up the stack and mark the sequences as having children
1580: if (&$filterFunc($curRes)) {
1581: for my $sequence (@{$dfsit->getStack()}) {
1582: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1583: }
1584: }
1585: }
1586: }
1587: } continue {
1588: $curRes = $dfsit->next();
1589: }
1590: }
1591:
1.133 bowersj2 1592: my $displayedJumpMarker = 0;
1.132 bowersj2 1593: # Set up iteration.
1594: my $now = time();
1595: my $in24Hours = $now + 24 * 60 * 60;
1596: my $rownum = 0;
1597:
1.141 bowersj2 1598: # export "here" marker information
1599: $args->{'here'} = $here;
1600:
1.222 bowersj2 1601: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1.270 albertel 1602: my @resources;
1603: my $code='';# sub { !(shift->is_map();) };
1604: if ($args->{'sort'} eq 'title') {
1.276 albertel 1605: my $oldFilterFunc = $filterFunc;
1606: my $filterFunc=
1607: sub {
1608: my ($res)=@_;
1609: if ($res->is_map()) { return 0;}
1610: return &$oldFilterFunc($res);
1611: };
1612: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.296 albertel 1613: @resources= sort { &cmp_title($a,$b) } @resources;
1614: } elsif ($args->{'sort'} eq 'duedate') {
1615: my $oldFilterFunc = $filterFunc;
1616: my $filterFunc=
1617: sub {
1618: my ($res)=@_;
1619: if (!$res->is_problem()) { return 0;}
1620: return &$oldFilterFunc($res);
1621: };
1622: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.289 raeburn 1623: @resources= sort {
1.270 albertel 1624: if ($a->duedate ne $b->duedate) {
1625: return $a->duedate cmp $b->duedate;
1626: }
1.296 albertel 1627: my $value=&cmp_title($a,$b);
1628: return $value;
1.270 albertel 1629: } @resources;
1.296 albertel 1630: } elsif ($args->{'sort'} eq 'discussion') {
1631: my $oldFilterFunc = $filterFunc;
1632: my $filterFunc=
1633: sub {
1634: my ($res)=@_;
1635: if (!$res->hasDiscussion() &&
1636: !$res->getFeedback() &&
1637: !$res->getErrors()) { return 0;}
1638: return &$oldFilterFunc($res);
1639: };
1640: @resources=$navmap->retrieveResources(undef,$filterFunc);
1641: @resources= sort { &cmp_title($a,$b) } @resources;
1.276 albertel 1642: } else {
1643: #unknow sort mechanism or default
1644: undef($args->{'sort'});
1.270 albertel 1645: }
1646:
1.276 albertel 1647:
1.270 albertel 1648: while (1) {
1649: if ($args->{'sort'}) {
1650: $curRes = shift(@resources);
1651: } else {
1652: $curRes = $it->next($closeAllPages);
1653: }
1654: if (!$curRes) { last; }
1655:
1.132 bowersj2 1656: # Maintain indentation level.
1657: if ($curRes == $it->BEGIN_MAP() ||
1658: $curRes == $it->BEGIN_BRANCH() ) {
1.133 bowersj2 1659: $args->{'indentLevel'}++;
1.132 bowersj2 1660: }
1661: if ($curRes == $it->END_MAP() ||
1662: $curRes == $it->END_BRANCH() ) {
1.133 bowersj2 1663: $args->{'indentLevel'}--;
1.132 bowersj2 1664: }
1665: # Notice new branches
1666: if ($curRes == $it->BEGIN_BRANCH()) {
1.133 bowersj2 1667: $args->{'isNewBranch'} = 1;
1668: }
1669:
1670: # If this isn't an actual resource, continue on
1671: if (!ref($curRes)) {
1672: next;
1.132 bowersj2 1673: }
1.133 bowersj2 1674:
1.143 bowersj2 1675: # If this has been filtered out, continue on
1676: if (!(&$filterFunc($curRes))) {
1677: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1678: next;
1679: }
1.132 bowersj2 1680:
1.190 bowersj2 1681: # If this is an empty sequence and we're filtering them, continue on
1.201 bowersj2 1682: if ($curRes->is_map() && $args->{'suppressEmptySequences'} &&
1.190 bowersj2 1683: !$curRes->{DATA}->{HAS_VISIBLE_CHILDREN}) {
1684: next;
1685: }
1686:
1.153 bowersj2 1687: # If we're suppressing navmaps and this is a navmap, continue on
1688: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1689: next;
1690: }
1691:
1.191 bowersj2 1692: $args->{'counter'}++;
1693:
1.132 bowersj2 1694: # Does it have multiple parts?
1.133 bowersj2 1695: $args->{'multipart'} = 0;
1696: $args->{'condensed'} = 0;
1.132 bowersj2 1697: my @parts;
1698:
1699: # Decide what parts to show.
1.133 bowersj2 1700: if ($curRes->is_problem() && $showParts) {
1.132 bowersj2 1701: @parts = @{$curRes->parts()};
1.192 bowersj2 1702: $args->{'multipart'} = $curRes->multipart();
1.132 bowersj2 1703:
1704: if ($condenseParts) { # do the condensation
1.133 bowersj2 1705: if (!$args->{'condensed'}) {
1.132 bowersj2 1706: # Decide whether to condense based on similarity
1.192 bowersj2 1707: my $status = $curRes->status($parts[0]);
1708: my $due = $curRes->duedate($parts[0]);
1709: my $open = $curRes->opendate($parts[0]);
1.132 bowersj2 1710: my $statusAllSame = 1;
1711: my $dueAllSame = 1;
1712: my $openAllSame = 1;
1.192 bowersj2 1713: for (my $i = 1; $i < scalar(@parts); $i++) {
1.132 bowersj2 1714: if ($curRes->status($parts[$i]) != $status){
1715: $statusAllSame = 0;
1716: }
1717: if ($curRes->duedate($parts[$i]) != $due ) {
1718: $dueAllSame = 0;
1719: }
1720: if ($curRes->opendate($parts[$i]) != $open) {
1721: $openAllSame = 0;
1722: }
1723: }
1724: # $*allSame is true if all the statuses were
1725: # the same. Now, if they are all the same and
1726: # match one of the statuses to condense, or they
1727: # are all open with the same due date, or they are
1728: # all OPEN_LATER with the same open date, display the
1729: # status of the first non-zero part (to get the 'correct'
1730: # status right, since 0 is never 'correct' or 'open').
1731: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1732: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1733: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1.192 bowersj2 1734: @parts = ($parts[0]);
1.133 bowersj2 1735: $args->{'condensed'} = 1;
1.132 bowersj2 1736: }
1737: }
1.198 bowersj2 1738: # Multipart problem with one part: always "condense" (happens
1739: # to match the desirable behavior)
1740: if ($curRes->countParts() == 1) {
1741: @parts = ($parts[0]);
1742: $args->{'condensed'} = 1;
1743: }
1.132 bowersj2 1744: }
1.157 bowersj2 1745: }
1.132 bowersj2 1746:
1747: # If the multipart problem was condensed, "forget" it was multipart
1748: if (scalar(@parts) == 1) {
1.133 bowersj2 1749: $args->{'multipart'} = 0;
1.192 bowersj2 1750: } else {
1751: # Add part 0 so we display it correctly.
1752: unshift @parts, '0';
1.132 bowersj2 1753: }
1.310 albertel 1754:
1755: {
1756: my ($src,$symb,$anchor,$stack);
1757: if ($args->{'sort'}) {
1758: my $it = $navmap->getIterator(undef, undef, undef, 1);
1759: while ( my $res=$it->next()) {
1760: if (ref($res) &&
1761: $res->symb() eq $curRes->symb()) { last; }
1762: }
1763: $stack=$it->getStack();
1764: } else {
1765: $stack=$it->getStack();
1766: }
1767: ($src,$symb,$anchor)=getLinkForResource($stack);
1768: if (defined($anchor)) { $anchor='#'.$anchor; }
1769: my $srcHasQuestion = $src =~ /\?/;
1770: $args->{"resourceLink"} = $src.
1771: ($srcHasQuestion?'&':'?') .
1.384 www 1772: 'symb=' . &escape($symb).$anchor;
1.310 albertel 1773: }
1.132 bowersj2 1774: # Now, we've decided what parts to show. Loop through them and
1775: # show them.
1.192 bowersj2 1776: foreach my $part (@parts) {
1.132 bowersj2 1777: $rownum ++;
1778: my $backgroundColor = $backgroundColors[$rownum % scalar(@backgroundColors)];
1779:
1780: $result .= " <tr bgcolor='$backgroundColor'>\n";
1.134 bowersj2 1781:
1782: # Set up some data about the parts that the cols might want
1783: my $filter = $it->{FILTER};
1.270 albertel 1784:
1.132 bowersj2 1785: # Now, display each column.
1786: foreach my $col (@$cols) {
1.139 bowersj2 1787: my $colHTML = '';
1788: if (ref($col)) {
1789: $colHTML .= &$col($curRes, $part, $args);
1790: } else {
1791: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1792: }
1.132 bowersj2 1793:
1.133 bowersj2 1794: # If this is the first column and it's time to print
1795: # the anchor, do so
1796: if ($col == $cols->[0] &&
1797: $args->{'counter'} == $args->{'currentJumpIndex'} -
1.139 bowersj2 1798: $currentJumpDelta) {
1799: # Jam the anchor after the <td> tag;
1800: # necessary for valid HTML (which Mozilla requires)
1801: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1.133 bowersj2 1802: $displayedJumpMarker = 1;
1803: }
1.139 bowersj2 1804: $result .= $colHTML . "\n";
1.132 bowersj2 1805: }
1.139 bowersj2 1806: $result .= " </tr>\n";
1.140 bowersj2 1807: $args->{'isNewBranch'} = 0;
1.139 bowersj2 1808: }
1.153 bowersj2 1809:
1.139 bowersj2 1810: if ($r && $rownum % 20 == 0) {
1811: $r->print($result);
1812: $result = "";
1813: $r->rflush();
1.132 bowersj2 1814: }
1.156 bowersj2 1815: } continue {
1.208 bowersj2 1816: if ($r) {
1817: # If we have the connection, make sure the user is still connected
1818: my $c = $r->connection;
1819: if ($c->aborted()) {
1820: # Who cares what we do, nobody will see it anyhow.
1821: return '';
1822: }
1823: }
1.132 bowersj2 1824: }
1825:
1.134 bowersj2 1826: # Print out the part that jumps to #curloc if it exists
1.159 bowersj2 1827: # delay needed because the browser is processing the jump before
1828: # it finishes rendering, so it goes to the wrong place!
1829: # onload might be better, but this routine has no access to that.
1830: # On mozilla, the 0-millisecond timeout seems to prevent this;
1831: # it's quite likely this might fix other browsers, too, and
1832: # certainly won't hurt anything.
1.139 bowersj2 1833: if ($displayedJumpMarker) {
1.247 albertel 1834: $result .= "
1835: <script>
1836: if (location.href.indexOf('#curloc')==-1) {
1837: setTimeout(\"location += '#curloc';\", 0)
1838: }
1839: </script>";
1.134 bowersj2 1840: }
1841:
1.132 bowersj2 1842: $result .= "</table>";
1.140 bowersj2 1843:
1844: if ($r) {
1845: $r->print($result);
1846: $result = "";
1847: $r->rflush();
1848: }
1849:
1.132 bowersj2 1850: return $result;
1851: }
1852:
1.281 albertel 1853: sub add_linkitem {
1854: my ($linkitems,$name,$cmd,$text)=@_;
1855: $$linkitems{$name}{'cmd'}=$cmd;
1856: $$linkitems{$name}{'text'}=&mt($text);
1857: }
1858:
1859: sub show_linkitems {
1860: my ($linkitems)=@_;
1.312 albertel 1861: my @linkorder = ("blank","launchnav","closenav","firsthomework",
1862: "everything","uncompleted","changefolder","clearbubbles");
1.281 albertel 1863:
1864: my $result .= (<<ENDBLOCK);
1.283 raeburn 1865: <td align="left">
1.281 albertel 1866: <script type="text/javascript">
1867: function changeNavDisplay () {
1868: var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;
1869: ENDBLOCK
1870: foreach my $link (@linkorder) {
1871: $result.= "if (navchoice == '$link') {".
1872: $linkitems->{$link}{'cmd'}."}\n";
1873: }
1874: $result.='}
1875: </script>
1876: <form name="linkitems" method="post">
1.421 bisitz 1877: <span class="LC_nobreak"><select name="toplink">'."\n";
1.281 albertel 1878: foreach my $link (@linkorder) {
1879: if (defined($linkitems->{$link})) {
1880: if ($linkitems->{$link}{'text'} ne '') {
1881: $result .= ' <option value="'.$link.'">'.
1882: $linkitems->{$link}{'text'}."</option>\n";
1883: }
1884: }
1885: }
1886: $result .= '</select> <input type="button" name="chgnav"
1887: value="Go" onClick="javascript:changeNavDisplay()" />
1.421 bisitz 1888: </span></form></td>'."\n";
1.298 albertel 1889:
1.281 albertel 1890: return $result;
1891: }
1892:
1.133 bowersj2 1893: 1;
1894:
1.418 jms 1895:
1896:
1897:
1898:
1899:
1900:
1901:
1902:
1.133 bowersj2 1903: package Apache::lonnavmaps::navmap;
1904:
1905: =pod
1906:
1.216 bowersj2 1907: =head1 Object: Apache::lonnavmaps::navmap
1.133 bowersj2 1908:
1.217 bowersj2 1909: =head2 Overview
1.133 bowersj2 1910:
1.217 bowersj2 1911: The navmap object's job is to provide access to the resources
1912: in the course as Apache::lonnavmaps::resource objects, and to
1913: query and manage the relationship between those resource objects.
1914:
1915: Generally, you'll use the navmap object in one of three basic ways.
1916: In order of increasing complexity and power:
1917:
1918: =over 4
1919:
1.358 albertel 1920: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
1.217 bowersj2 1921: various ways to obtain resource objects, based on various identifiers.
1922: Use this when you want to request information about one object or
1923: a handful of resources you already know the identities of, from some
1924: other source. For more about Ids, Symbs, and MapPcs, see the
1925: Resource documentation. Note that Url should be a B<last resort>,
1.358 albertel 1926: not your first choice; it only really works when there is only one
1.217 bowersj2 1927: instance of the resource in the course, which only applies to
1.358 albertel 1928: maps, and even that may change in the future (see the B<getResourceByUrl>
1929: documentation for more details.)
1.217 bowersj2 1930:
1931: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
1932: retrieves resources matching some criterion and returns them
1933: in a flat array, with no structure information. Use this when
1934: you are manipulating a series of resources, based on what map
1935: the are in, but do not care about branching, or exactly how
1936: the maps and resources are related. This is the most common case.
1937:
1938: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
1939: the course's navmap in various ways without writing the traversal
1940: code yourself. See iterator documentation below. Use this when
1941: you need to know absolutely everything about the course, including
1942: branches and the precise relationship between maps and resources.
1943:
1944: =back
1945:
1946: =head2 Creation And Destruction
1947:
1948: To create a navmap object, use the following function:
1.133 bowersj2 1949:
1950: =over 4
1951:
1.221 bowersj2 1952: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
1.133 bowersj2 1953:
1.221 bowersj2 1954: Creates a new navmap object. Returns the navmap object if this is
1955: successful, or B<undef> if not.
1.174 albertel 1956:
1.216 bowersj2 1957: =back
1958:
1959: =head2 Methods
1960:
1961: =over 4
1962:
1.174 albertel 1963: =item * B<getIterator>(first, finish, filter, condition):
1964:
1965: See iterator documentation below.
1.133 bowersj2 1966:
1967: =cut
1968:
1969: use strict;
1970: use GDBM_File;
1.320 albertel 1971: use Apache::lonnet;
1.397 albertel 1972: use LONCAPA;
1.133 bowersj2 1973:
1974: sub new {
1975: # magic invocation to create a class instance
1976: my $proto = shift;
1977: my $class = ref($proto) || $proto;
1978: my $self = {};
1979:
1980: # Resource cache stores navmap resources as we reference them. We generate
1981: # them on-demand so we don't pay for creating resources unless we use them.
1982: $self->{RESOURCE_CACHE} = {};
1983:
1984: # Network failure flag, if we accessed the course or user opt and
1985: # failed
1986: $self->{NETWORK_FAILURE} = 0;
1987:
1988: # tie the nav hash
1989:
1.168 bowersj2 1990: my %navmaphash;
1991: my %parmhash;
1.320 albertel 1992: my $courseFn = $env{"request.course.fn"};
1.220 bowersj2 1993: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
1.133 bowersj2 1994: &GDBM_READER(), 0640))) {
1995: return undef;
1996: }
1997:
1.220 bowersj2 1998: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
1.133 bowersj2 1999: &GDBM_READER(), 0640)))
2000: {
1.170 matthew 2001: untie %{$self->{PARM_HASH}};
1.133 bowersj2 2002: return undef;
2003: }
2004:
1.199 bowersj2 2005: $self->{NAV_HASH} = \%navmaphash;
1.168 bowersj2 2006: $self->{PARM_HASH} = \%parmhash;
1.221 bowersj2 2007: $self->{PARM_CACHE} = {};
1.133 bowersj2 2008:
2009: bless($self);
2010:
2011: return $self;
2012: }
2013:
1.221 bowersj2 2014: sub generate_course_user_opt {
1.133 bowersj2 2015: my $self = shift;
1.221 bowersj2 2016: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
1.133 bowersj2 2017:
1.320 albertel 2018: my $uname=$env{'user.name'};
2019: my $udom=$env{'user.domain'};
2020: my $cid=$env{'request.course.id'};
1.326 albertel 2021: my $cdom=$env{'course.'.$cid.'.domain'};
2022: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2023:
1.133 bowersj2 2024: # ------------------------------------------------- Get coursedata (if present)
1.326 albertel 2025: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
2026: # Check for network failure
2027: if (!ref($courseopt)) {
2028: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
1.324 albertel 2029: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2030: }
1.326 albertel 2031: undef($courseopt);
2032: }
1.325 albertel 2033:
1.133 bowersj2 2034: # --------------------------------------------------- Get userdata (if present)
1.325 albertel 2035:
1.326 albertel 2036: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
2037: # Check for network failure
2038: if (!ref($useropt)) {
2039: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
1.324 albertel 2040: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2041: }
1.326 albertel 2042: undef($useropt);
1.221 bowersj2 2043: }
2044:
1.326 albertel 2045: $self->{COURSE_OPT} = $courseopt;
2046: $self->{USER_OPT} = $useropt;
2047:
1.221 bowersj2 2048: $self->{COURSE_USER_OPT_GENERATED} = 1;
2049:
2050: return;
2051: }
2052:
2053: sub generate_email_discuss_status {
2054: my $self = shift;
1.259 raeburn 2055: my $symb = shift;
1.221 bowersj2 2056: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
1.133 bowersj2 2057:
1.320 albertel 2058: my $cid=$env{'request.course.id'};
1.326 albertel 2059: my $cdom=$env{'course.'.$cid.'.domain'};
2060: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2061:
2062: my %emailstatus = &Apache::lonnet::dump('email_status');
2063: my $logoutTime = $emailstatus{'logout'};
1.320 albertel 2064: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
1.221 bowersj2 2065: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2066: $courseLeaveTime : $logoutTime);
2067: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2068: $cdom, $cnum);
1.259 raeburn 2069: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
1.320 albertel 2070: $env{'user.domain'},$env{'user.name'},'lastread');
1.259 raeburn 2071: my %lastreadtime = ();
1.394 raeburn 2072: foreach my $key (keys %lastread) {
2073: my $shortkey = $key;
2074: $shortkey =~ s/_lastread$//;
2075: $lastreadtime{$shortkey} = $lastread{$key};
1.259 raeburn 2076: }
2077:
1.221 bowersj2 2078: my %feedback=();
2079: my %error=();
1.325 albertel 2080: my @keys = &Apache::lonnet::getkeys('nohist_email',$env{'user.domain'},
2081: $env{'user.name'});
1.221 bowersj2 2082:
1.325 albertel 2083: foreach my $msgid (@keys) {
1.295 albertel 2084: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
1.395 raeburn 2085: my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
2086: $symb,$error) = &Apache::lonmsg::unpackmsgid($msgid);
1.396 raeburn 2087: &Apache::lonenc::check_decrypt(\$symb);
2088: if (($fromcid ne '') && ($fromcid ne $cid)) {
2089: next;
2090: }
1.395 raeburn 2091: if (defined($symb)) {
2092: if (defined($error) && $error == 1) {
2093: $error{$symb}.=','.$msgid;
2094: } else {
2095: $feedback{$symb}.=','.$msgid;
2096: }
2097: } else {
2098: my $plain=
2099: &LONCAPA::unescape(&LONCAPA::unescape($msgid));
2100: if ($plain=~/ \[([^\]]+)\]\:/) {
2101: my $url=$1;
2102: if ($plain=~/\:Error \[/) {
2103: $error{$url}.=','.$msgid;
2104: } else {
2105: $feedback{$url}.=','.$msgid;
2106: }
2107: }
2108: }
1.221 bowersj2 2109: }
1.211 bowersj2 2110: }
1.221 bowersj2 2111:
1.395 raeburn 2112: #symbs of resources that have feedbacks (will be urls pre-2.3)
1.221 bowersj2 2113: $self->{FEEDBACK} = \%feedback;
1.395 raeburn 2114: #or errors (will be urls pre 2.3)
1.295 albertel 2115: $self->{ERROR_MSG} = \%error;
1.221 bowersj2 2116: $self->{DISCUSSION_TIME} = \%discussiontime;
2117: $self->{EMAIL_STATUS} = \%emailstatus;
1.259 raeburn 2118: $self->{LAST_READ} = \%lastreadtime;
1.221 bowersj2 2119:
2120: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2121: }
2122:
2123: sub get_user_data {
2124: my $self = shift;
2125: if ($self->{RETRIEVED_USER_DATA}) { return; }
1.211 bowersj2 2126:
1.221 bowersj2 2127: # Retrieve performance data on problems
1.320 albertel 2128: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
2129: $env{'user.domain'},
2130: $env{'user.name'});
1.221 bowersj2 2131: $self->{STUDENT_DATA} = \%student_data;
1.133 bowersj2 2132:
1.221 bowersj2 2133: $self->{RETRIEVED_USER_DATA} = 1;
1.133 bowersj2 2134: }
2135:
1.354 raeburn 2136: sub get_discussion_data {
2137: my $self = shift;
2138: if ($self->{RETRIEVED_DISCUSSION_DATA}) {
1.366 albertel 2139: return $self->{DISCUSSION_DATA};
1.354 raeburn 2140: }
1.366 albertel 2141:
2142: $self->generate_email_discuss_status();
2143:
1.354 raeburn 2144: my $cid=$env{'request.course.id'};
2145: my $cdom=$env{'course.'.$cid.'.domain'};
2146: my $cnum=$env{'course.'.$cid.'.num'};
2147: # Retrieve discussion data for resources in course
1.367 albertel 2148: my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
1.366 albertel 2149:
2150:
1.354 raeburn 2151: $self->{DISCUSSION_DATA} = \%discussion_data;
2152: $self->{RETRIEVED_DISCUSSION_DATA} = 1;
2153: return $self->{DISCUSSION_DATA};
2154: }
2155:
2156:
1.133 bowersj2 2157: # Internal function: Takes a key to look up in the nav hash and implements internal
2158: # memory caching of that key.
2159: sub navhash {
2160: my $self = shift; my $key = shift;
2161: return $self->{NAV_HASH}->{$key};
2162: }
2163:
1.217 bowersj2 2164: =pod
2165:
2166: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2167: false otherwise. Undefined course maps indicate an error somewhere in
2168: LON-CAPA, and you will not be able to proceed with using the navmap.
2169: See the B<NAV> screen for an example of using this.
2170:
2171: =cut
2172:
1.133 bowersj2 2173: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2174: sub courseMapDefined {
2175: my $self = shift;
1.320 albertel 2176: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
1.133 bowersj2 2177:
2178: my $firstres = $self->navhash("map_start_$uri");
2179: my $lastres = $self->navhash("map_finish_$uri");
2180: return $firstres && $lastres;
2181: }
2182:
2183: sub getIterator {
2184: my $self = shift;
2185: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.314 albertel 2186: shift, undef, shift,
2187: shift, shift);
1.133 bowersj2 2188: return $iterator;
2189: }
2190:
2191: # Private method: Does the given resource (as a symb string) have
2192: # current discussion? Returns 0 if chat/mail data not extracted.
2193: sub hasDiscussion {
2194: my $self = shift;
2195: my $symb = shift;
1.221 bowersj2 2196: $self->generate_email_discuss_status();
2197:
1.133 bowersj2 2198: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2199:
2200: #return defined($self->{DISCUSSION_TIME}->{$symb});
1.259 raeburn 2201:
1.323 albertel 2202: # backward compatibility (bulletin boards used to be 'wrapped')
2203: my $ressymb = $self->wrap_symb($symb);
1.259 raeburn 2204: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2205: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2206: } else {
1.266 raeburn 2207: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2208: 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).
1.259 raeburn 2209: }
1.133 bowersj2 2210: }
2211:
1.366 albertel 2212: sub last_post_time {
2213: my $self = shift;
2214: my $symb = shift;
2215: my $ressymb = $self->wrap_symb($symb);
2216: return $self->{DISCUSSION_TIME}->{$ressymb};
2217: }
2218:
1.393 raeburn 2219: sub discussion_info {
1.366 albertel 2220: my $self = shift;
2221: my $symb = shift;
1.393 raeburn 2222: my $filter = shift;
1.366 albertel 2223:
2224: $self->get_discussion_data();
1.372 raeburn 2225:
1.366 albertel 2226: my $ressymb = $self->wrap_symb($symb);
1.372 raeburn 2227: # keys used to store bulletinboard postings use 'unwrapped' symb.
1.397 albertel 2228: my $discsymb = &escape($self->unwrap_symb($ressymb));
1.372 raeburn 2229: my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
1.366 albertel 2230: if (!$version) { return; }
2231:
2232: my $prevread = $self->{LAST_READ}{$ressymb};
2233:
1.393 raeburn 2234: my $count = 0;
1.366 albertel 2235: my $hiddenflag = 0;
2236: my $deletedflag = 0;
1.393 raeburn 2237: my ($hidden,$deleted,%info);
1.366 albertel 2238:
2239: for (my $id=$version; $id>0; $id--) {
1.372 raeburn 2240: my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
1.366 albertel 2241: my @keys=split(/:/,$vkeys);
2242: if (grep(/^hidden$/ ,@keys)) {
2243: if (!$hiddenflag) {
1.372 raeburn 2244: $hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
1.366 albertel 2245: $hiddenflag = 1;
2246: }
2247: } elsif (grep(/^deleted$/,@keys)) {
2248: if (!$deletedflag) {
1.372 raeburn 2249: $deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
1.366 albertel 2250: $deletedflag = 1;
2251: }
2252: } else {
1.393 raeburn 2253: if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
2254: if ($filter eq 'unread') {
2255: if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
2256: next;
2257: }
2258: }
2259: $count++;
2260: $info{$count}{'subject'} =
2261: $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
2262: $info{$count}{'id'} = $id;
2263: $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
2264: }
1.366 albertel 2265: }
2266: }
2267: if (wantarray) {
1.393 raeburn 2268: return ($count,%info);
1.366 albertel 2269: }
1.393 raeburn 2270: return $count;
1.366 albertel 2271: }
2272:
1.321 raeburn 2273: sub wrap_symb {
1.322 albertel 2274: my $self = shift;
1.321 raeburn 2275: my $symb = shift;
1.373 albertel 2276: if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
1.322 albertel 2277: unless ($symb =~ m|adm/wrapper/adm|) {
2278: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
1.321 raeburn 2279: }
2280: }
1.322 albertel 2281: return $symb;
1.321 raeburn 2282: }
2283:
1.372 raeburn 2284: sub unwrap_symb {
2285: my $self = shift;
2286: my $ressymb = shift;
2287: my $discsymb = $ressymb;
1.373 albertel 2288: if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
1.372 raeburn 2289: $discsymb = $1.$2;
2290: }
2291: return $discsymb;
2292: }
2293:
1.322 albertel 2294: # Private method: Does the given resource (as a symb string) have
2295: # current feedback? Returns the string in the feedback hash, which
2296: # will be false if it does not exist.
2297:
1.133 bowersj2 2298: sub getFeedback {
2299: my $self = shift;
2300: my $symb = shift;
1.395 raeburn 2301: my $source = shift;
1.133 bowersj2 2302:
1.221 bowersj2 2303: $self->generate_email_discuss_status();
2304:
1.133 bowersj2 2305: if (!defined($self->{FEEDBACK})) { return ""; }
2306:
1.395 raeburn 2307: my $feedback;
2308: if ($self->{FEEDBACK}->{$symb}) {
2309: $feedback = $self->{FEEDBACK}->{$symb};
2310: if ($self->{FEEDBACK}->{$source}) {
2311: $feedback .= ','.$self->{FEEDBACK}->{$source};
2312: }
2313: } else {
2314: if ($self->{FEEDBACK}->{$source}) {
2315: $feedback = $self->{FEEDBACK}->{$source};
2316: }
2317: }
2318: return $feedback;
1.133 bowersj2 2319: }
2320:
2321: # Private method: Get the errors for that resource (by source).
2322: sub getErrors {
2323: my $self = shift;
1.395 raeburn 2324: my $symb = shift;
1.133 bowersj2 2325: my $src = shift;
1.221 bowersj2 2326:
2327: $self->generate_email_discuss_status();
2328:
1.133 bowersj2 2329: if (!defined($self->{ERROR_MSG})) { return ""; }
1.395 raeburn 2330:
2331: my $errors;
2332: if ($self->{ERROR_MSG}->{$symb}) {
2333: $errors = $self->{ERROR_MSG}->{$symb};
2334: if ($self->{ERROR_MSG}->{$src}) {
2335: $errors .= ','.$self->{ERROR_MSG}->{$src};
2336: }
2337: } else {
2338: if ($self->{ERROR_MSG}->{$src}) {
2339: $errors = $self->{ERROR_MSG}->{$src};
2340: }
2341: }
2342: return $errors;
1.133 bowersj2 2343: }
2344:
2345: =pod
2346:
1.174 albertel 2347: =item * B<getById>(id):
2348:
2349: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2350: object for that resource. This method, or other methods that use it
2351: (as in the resource object) is the only proper way to obtain a
2352: resource object.
1.133 bowersj2 2353:
1.194 bowersj2 2354: =item * B<getBySymb>(symb):
2355:
2356: Based on the symb of the resource, get a resource object for that
2357: resource. This is one of the proper ways to get a resource object.
2358:
2359: =item * B<getMapByMapPc>(map_pc):
2360:
2361: Based on the map_pc of the resource, get a resource object for
2362: the given map. This is one of the proper ways to get a resource object.
2363:
1.133 bowersj2 2364: =cut
2365:
2366: # The strategy here is to cache the resource objects, and only construct them
2367: # as we use them. The real point is to prevent reading any more from the tied
1.398 banghart 2368: # hash than we have to, which should hopefully alleviate speed problems.
1.133 bowersj2 2369:
2370: sub getById {
2371: my $self = shift;
2372: my $id = shift;
2373:
2374: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2375: {
2376: return $self->{RESOURCE_CACHE}->{$id};
2377: }
2378:
2379: # resource handles inserting itself into cache.
2380: # Not clear why the quotes are necessary, but as of this
2381: # writing it doesn't work without them.
2382: return "Apache::lonnavmaps::resource"->new($self, $id);
1.132 bowersj2 2383: }
1.133 bowersj2 2384:
1.172 bowersj2 2385: sub getBySymb {
2386: my $self = shift;
2387: my $symb = shift;
1.277 matthew 2388:
1.228 albertel 2389: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
1.172 bowersj2 2390: my $map = $self->getResourceByUrl($mapUrl);
1.277 matthew 2391: my $returnvalue = undef;
2392: if (ref($map)) {
2393: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2394: }
2395: return $returnvalue;
1.194 bowersj2 2396: }
2397:
2398: sub getByMapPc {
2399: my $self = shift;
2400: my $map_pc = shift;
2401: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2402: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2403: return $self->getById($map_id);
1.172 bowersj2 2404: }
2405:
1.133 bowersj2 2406: =pod
2407:
1.174 albertel 2408: =item * B<firstResource>():
2409:
2410: Returns a resource object reference corresponding to the first
2411: resource in the navmap.
1.133 bowersj2 2412:
2413: =cut
2414:
2415: sub firstResource {
2416: my $self = shift;
2417: my $firstResource = $self->navhash('map_start_' .
1.320 albertel 2418: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2419: return $self->getById($firstResource);
1.132 bowersj2 2420: }
1.133 bowersj2 2421:
2422: =pod
2423:
1.174 albertel 2424: =item * B<finishResource>():
2425:
2426: Returns a resource object reference corresponding to the last resource
2427: in the navmap.
1.133 bowersj2 2428:
2429: =cut
2430:
2431: sub finishResource {
2432: my $self = shift;
2433: my $firstResource = $self->navhash('map_finish_' .
1.320 albertel 2434: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2435: return $self->getById($firstResource);
1.132 bowersj2 2436: }
1.133 bowersj2 2437:
2438: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2439: # the actual lookup; parmval caches the results.
2440: sub parmval {
2441: my $self = shift;
1.399 albertel 2442: my ($what,$symb,$recurse)=@_;
1.133 bowersj2 2443: my $hashkey = $what."|||".$symb;
2444:
2445: if (defined($self->{PARM_CACHE}->{$hashkey})) {
1.411 raeburn 2446: if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {
2447: if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {
2448: if (wantarray) {
2449: return @{$self->{PARM_CACHE}->{$hashkey}};
2450: } else {
2451: return $self->{PARM_CACHE}->{$hashkey}->[0];
2452: }
2453: }
2454: } else {
2455: return $self->{PARM_CACHE}->{$hashkey};
2456: }
1.133 bowersj2 2457: }
1.399 albertel 2458: my $result = $self->parmval_real($what, $symb, $recurse);
1.133 bowersj2 2459: $self->{PARM_CACHE}->{$hashkey} = $result;
1.405 albertel 2460: if (wantarray) {
1.411 raeburn 2461: return @{$result};
1.405 albertel 2462: }
2463: return $result->[0];
1.132 bowersj2 2464: }
2465:
1.133 bowersj2 2466: sub parmval_real {
2467: my $self = shift;
1.219 albertel 2468: my ($what,$symb,$recurse) = @_;
1.133 bowersj2 2469:
1.221 bowersj2 2470: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2471: $self->generate_course_user_opt();
2472:
1.320 albertel 2473: my $cid=$env{'request.course.id'};
2474: my $csec=$env{'request.course.sec'};
1.350 raeburn 2475: my $cgroup='';
2476: my @cgrps=split(/:/,$env{'request.course.groups'});
2477: if (@cgrps > 0) {
2478: @cgrps = sort(@cgrps);
2479: $cgroup = $cgrps[0];
2480: }
1.320 albertel 2481: my $uname=$env{'user.name'};
2482: my $udom=$env{'user.domain'};
1.133 bowersj2 2483:
1.405 albertel 2484: unless ($symb) { return ['']; }
1.133 bowersj2 2485: my $result='';
2486:
1.226 www 2487: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
1.383 albertel 2488: $mapname = &Apache::lonnet::deversion($mapname);
1.133 bowersj2 2489: # ----------------------------------------------------- Cascading lookup scheme
2490: my $rwhat=$what;
2491: $what=~s/^parameter\_//;
2492: $what=~s/\_/\./;
2493:
2494: my $symbparm=$symb.'.'.$what;
2495: my $mapparm=$mapname.'___(all).'.$what;
1.325 albertel 2496: my $usercourseprefix=$cid;
1.133 bowersj2 2497:
1.350 raeburn 2498: my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
2499: my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
2500: my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
2501:
1.133 bowersj2 2502: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2503: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2504: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2505:
2506: my $courselevel= $usercourseprefix.'.'.$what;
2507: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2508: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2509:
2510: my $useropt = $self->{USER_OPT};
2511: my $courseopt = $self->{COURSE_OPT};
2512: my $parmhash = $self->{PARM_HASH};
2513:
2514: # ---------------------------------------------------------- first, check user
2515: if ($uname and defined($useropt)) {
1.405 albertel 2516: if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }
2517: if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }
2518: if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }
1.133 bowersj2 2519: }
2520:
2521: # ------------------------------------------------------- second, check course
1.350 raeburn 2522: if ($cgroup ne '' and defined($courseopt)) {
1.405 albertel 2523: if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }
2524: if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }
2525: if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }
1.350 raeburn 2526: }
2527:
1.133 bowersj2 2528: if ($csec and defined($courseopt)) {
1.405 albertel 2529: if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }
2530: if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }
2531: if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }
1.133 bowersj2 2532: }
2533:
2534: if (defined($courseopt)) {
1.405 albertel 2535: if (defined($$courseopt{$courselevelr})) { return [$$courseopt{$courselevelr},'resource']; }
1.133 bowersj2 2536: }
2537:
2538: # ----------------------------------------------------- third, check map parms
2539:
2540: my $thisparm=$$parmhash{$symbparm};
1.405 albertel 2541: if (defined($thisparm)) { return [$thisparm,'map']; }
1.133 bowersj2 2542:
2543: # ----------------------------------------------------- fourth , check default
2544:
1.246 albertel 2545: my $meta_rwhat=$rwhat;
2546: $meta_rwhat=~s/\./_/g;
2547: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
1.405 albertel 2548: if (defined($default)) { return [$default,'resource']}
1.246 albertel 2549: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
1.405 albertel 2550: if (defined($default)) { return [$default,'resource']}
1.315 albertel 2551: # --------------------------------------------------- fifth, check more course
2552: if (defined($courseopt)) {
1.405 albertel 2553: if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }
2554: if (defined($$courseopt{$courselevel})) {
2555: my $ret = [$$courseopt{$courselevel},'course'];
2556: return $ret;
2557: }
1.315 albertel 2558: }
2559: # --------------------------------------------------- sixth , cascade up parts
1.133 bowersj2 2560:
2561: my ($space,@qualifier)=split(/\./,$rwhat);
2562: my $qualifier=join('.',@qualifier);
2563: unless ($space eq '0') {
1.160 albertel 2564: my @parts=split(/_/,$space);
2565: my $id=pop(@parts);
2566: my $part=join('_',@parts);
2567: if ($part eq '') { $part='0'; }
1.405 albertel 2568: my @partgeneral=$self->parmval($part.".$qualifier",$symb,1);
2569: if (defined($partgeneral[0])) { return \@partgeneral; }
1.133 bowersj2 2570: }
1.405 albertel 2571: if ($recurse) { return []; }
1.399 albertel 2572: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat);
1.405 albertel 2573: if (defined($pack_def)) { return [$pack_def,'resource']; }
2574: return [''];
1.145 bowersj2 2575: }
2576:
1.174 albertel 2577: =pod
1.145 bowersj2 2578:
1.352 raeburn 2579: =item * B<getResourceByUrl>(url,multiple):
1.145 bowersj2 2580:
1.352 raeburn 2581: Retrieves a resource object by URL of the resource, unless the optional
1.398 banghart 2582: multiple parameter is included in which case an array of resource
1.352 raeburn 2583: objects is returned. If passed a resource object, it will simply return
2584: it, so it is safe to use this method in code like
2585: "$res = $navmap->getResourceByUrl($res)"
2586: if you're not sure if $res is already an object, or just a URL. If the
2587: resource appears multiple times in the course, only the first instance
2588: will be returned (useful for maps), unless the multiple parameter has
2589: been included, in which case all instances are returned in an array.
1.174 albertel 2590:
1.314 albertel 2591: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall):
1.174 albertel 2592:
2593: The map is a specification of a map to retreive the resources from,
2594: either as a url or as an object. The filterFunc is a reference to a
2595: function that takes a resource object as its one argument and returns
2596: true if the resource should be included, or false if it should not
2597: be. If recursive is true, the map will be recursively examined,
2598: otherwise it will not be. If bailout is true, the function will return
1.314 albertel 2599: as soon as it finds a resource, if false it will finish. If showall is
2600: true it will not hide maps that contain nothing but one other map. By
2601: default, the map is the top-level map of the course, filterFunc is a
2602: function that always returns 1, recursive is true, bailout is false,
2603: showall is false. The resources will be returned in a list containing
2604: the resource objects for the corresponding resources, with B<no
2605: structure information> in the list; regardless of branching,
2606: recursion, etc., it will be a flat list.
1.174 albertel 2607:
2608: Thus, this is suitable for cases where you don't want the structure,
2609: just a list of all resources. It is also suitable for finding out how
2610: many resources match a given description; for this use, if all you
2611: want to know is if I<any> resources match the description, the bailout
2612: parameter will allow you to avoid potentially expensive enumeration of
2613: all matching resources.
1.145 bowersj2 2614:
1.318 albertel 2615: =item * B<hasResource>(map, filterFunc, recursive, showall):
1.145 bowersj2 2616:
1.398 banghart 2617: Convenience method for
1.146 bowersj2 2618:
1.318 albertel 2619: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
1.146 bowersj2 2620:
1.174 albertel 2621: which will tell whether the map has resources matching the description
2622: in the filter function.
1.146 bowersj2 2623:
1.352 raeburn 2624: =item * B<usedVersion>(url):
2625:
2626: Retrieves version infomation for a url. Returns the version (a number, or
2627: the string "mostrecent") for resources which have version information in
2628: the big hash.
2629:
1.145 bowersj2 2630: =cut
2631:
1.277 matthew 2632:
1.145 bowersj2 2633: sub getResourceByUrl {
2634: my $self = shift;
2635: my $resUrl = shift;
1.352 raeburn 2636: my $multiple = shift;
1.145 bowersj2 2637:
2638: if (ref($resUrl)) { return $resUrl; }
2639:
2640: $resUrl = &Apache::lonnet::clutter($resUrl);
2641: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
1.352 raeburn 2642: if (!$resId) { return ''; }
2643: if ($multiple) {
2644: my @resources = ();
2645: my @resIds = split (/,/, $resId);
2646: foreach my $id (@resIds) {
1.353 raeburn 2647: my $resourceId = $self->getById($id);
2648: if ($resourceId) {
2649: push(@resources,$resourceId);
1.352 raeburn 2650: }
2651: }
2652: return @resources;
2653: } else {
2654: if ($resId =~ /,/) {
2655: $resId = (split (/,/, $resId))[0];
2656: }
2657: return $self->getById($resId);
1.145 bowersj2 2658: }
2659: }
2660:
2661: sub retrieveResources {
2662: my $self = shift;
2663: my $map = shift;
2664: my $filterFunc = shift;
2665: if (!defined ($filterFunc)) {
2666: $filterFunc = sub {return 1;};
2667: }
2668: my $recursive = shift;
2669: if (!defined($recursive)) { $recursive = 1; }
2670: my $bailout = shift;
2671: if (!defined($bailout)) { $bailout = 0; }
1.314 albertel 2672: my $showall = shift;
1.145 bowersj2 2673: # Create the necessary iterator.
2674: if (!ref($map)) { # assume it's a url of a map.
1.172 bowersj2 2675: $map = $self->getResourceByUrl($map);
1.145 bowersj2 2676: }
2677:
1.213 bowersj2 2678: # If nothing was passed, assume top-level map
2679: if (!$map) {
2680: $map = $self->getById('0.0');
2681: }
2682:
1.145 bowersj2 2683: # Check the map's validity.
1.213 bowersj2 2684: if (!$map->is_map()) {
1.145 bowersj2 2685: # Oh, to throw an exception.... how I'd love that!
2686: return ();
2687: }
2688:
1.146 bowersj2 2689: # Get an iterator.
2690: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
1.314 albertel 2691: undef, $recursive, $showall);
1.146 bowersj2 2692:
2693: my @resources = ();
2694:
1.400 albertel 2695: if (&$filterFunc($map)) {
2696: push(@resources, $map);
2697: }
2698:
1.146 bowersj2 2699: # Run down the iterator and collect the resources.
1.222 bowersj2 2700: my $curRes;
2701:
2702: while ($curRes = $it->next()) {
1.146 bowersj2 2703: if (ref($curRes)) {
2704: if (!&$filterFunc($curRes)) {
2705: next;
2706: }
2707:
1.400 albertel 2708: push(@resources, $curRes);
1.146 bowersj2 2709:
2710: if ($bailout) {
2711: return @resources;
2712: }
2713: }
2714:
2715: }
2716:
2717: return @resources;
2718: }
2719:
2720: sub hasResource {
2721: my $self = shift;
2722: my $map = shift;
2723: my $filterFunc = shift;
2724: my $recursive = shift;
1.318 albertel 2725: my $showall = shift;
1.146 bowersj2 2726:
1.318 albertel 2727: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
1.133 bowersj2 2728: }
1.51 bowersj2 2729:
1.352 raeburn 2730: sub usedVersion {
2731: my $self = shift;
2732: my $linkurl = shift;
2733: return $self->navhash("version_$linkurl");
2734: }
2735:
1.51 bowersj2 2736: 1;
2737:
2738: package Apache::lonnavmaps::iterator;
1.365 albertel 2739: use Scalar::Util qw(weaken);
1.320 albertel 2740: use Apache::lonnet;
2741:
1.51 bowersj2 2742: =pod
2743:
2744: =back
2745:
1.174 albertel 2746: =head1 Object: navmap Iterator
1.51 bowersj2 2747:
1.174 albertel 2748: An I<iterator> encapsulates the logic required to traverse a data
2749: structure. navmap uses an iterator to traverse the course map
2750: according to the criteria you wish to use.
2751:
2752: To obtain an iterator, call the B<getIterator>() function of a
2753: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
2754: directly.) This will return a reference to the iterator:
1.51 bowersj2 2755:
2756: C<my $resourceIterator = $navmap-E<gt>getIterator();>
2757:
2758: To get the next thing from the iterator, call B<next>:
2759:
2760: C<my $nextThing = $resourceIterator-E<gt>next()>
2761:
2762: getIterator behaves as follows:
2763:
2764: =over 4
2765:
1.174 albertel 2766: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
2767:
2768: All parameters are optional. firstResource is a resource reference
2769: corresponding to where the iterator should start. It defaults to
2770: navmap->firstResource() for the corresponding nav map. finishResource
2771: corresponds to where you want the iterator to end, defaulting to
2772: navmap->finishResource(). filterHash is a hash used as a set
2773: containing strings representing the resource IDs, defaulting to
2774: empty. Condition is a 1 or 0 that sets what to do with the filter
1.205 bowersj2 2775: hash: If a 0, then only resources that exist IN the filterHash will be
1.174 albertel 2776: recursed on. If it is a 1, only resources NOT in the filterHash will
2777: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
2778: false (default), the iterator will only return the first level of map
2779: that is not just a single, 'redirecting' map. If true, the iterator
2780: will return all information, starting with the top-level map,
2781: regardless of content. returnTopMap, if true (default false), will
2782: cause the iterator to return the top-level map object (resource 0.0)
2783: before anything else.
2784:
2785: Thus, by default, only top-level resources will be shown. Change the
2786: condition to a 1 without changing the hash, and all resources will be
2787: shown. Changing the condition to 1 and including some values in the
2788: hash will allow you to selectively suppress parts of the navmap, while
2789: leaving it on 0 and adding things to the hash will allow you to
2790: selectively add parts of the nav map. See the handler code for
2791: examples.
2792:
2793: The iterator will return either a reference to a resource object, or a
2794: token representing something in the map, such as the beginning of a
2795: new branch. The possible tokens are:
2796:
2797: =over 4
1.51 bowersj2 2798:
1.222 bowersj2 2799: =item * B<END_ITERATOR>:
2800:
2801: The iterator has returned all that it's going to. Further calls to the
2802: iterator will just produce more of these. This is a "false" value, and
2803: is the only false value the iterator which will be returned, so it can
2804: be used as a loop sentinel.
2805:
1.217 bowersj2 2806: =item * B<BEGIN_MAP>:
1.51 bowersj2 2807:
1.174 albertel 2808: A new map is being recursed into. This is returned I<after> the map
2809: resource itself is returned.
1.51 bowersj2 2810:
1.217 bowersj2 2811: =item * B<END_MAP>:
1.174 albertel 2812:
2813: The map is now done.
1.51 bowersj2 2814:
1.217 bowersj2 2815: =item * B<BEGIN_BRANCH>:
1.70 bowersj2 2816:
1.174 albertel 2817: A branch is now starting. The next resource returned will be the first
2818: in that branch.
1.70 bowersj2 2819:
1.217 bowersj2 2820: =item * B<END_BRANCH>:
1.70 bowersj2 2821:
1.174 albertel 2822: The branch is now done.
1.51 bowersj2 2823:
2824: =back
2825:
1.174 albertel 2826: The tokens are retreivable via methods on the iterator object, i.e.,
2827: $iterator->END_MAP.
1.70 bowersj2 2828:
1.174 albertel 2829: Maps can contain empty resources. The iterator will automatically skip
2830: over such resources, but will still treat the structure
2831: correctly. Thus, a complicated map with several branches, but
2832: consisting entirely of empty resources except for one beginning or
2833: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
2834: but only one resource will be returned.
1.116 bowersj2 2835:
1.242 matthew 2836: =back
2837:
1.222 bowersj2 2838: =head2 Normal Usage
2839:
2840: Normal usage of the iterator object is to do the following:
2841:
2842: my $it = $navmap->getIterator([your params here]);
2843: my $curRes;
2844: while ($curRes = $it->next()) {
2845: [your logic here]
2846: }
2847:
2848: Note that inside of the loop, it's frequently useful to check if
2849: "$curRes" is a reference or not with the reference function; only
2850: resource objects will be references, and any non-references will
2851: be the tokens described above.
2852:
2853: Also note there is some old code floating around that trys to track
2854: the depth of the iterator to see when it's done; do not copy that
1.398 banghart 2855: code. It is difficult to get right and harder to understand than
1.222 bowersj2 2856: this. They should be migrated to this new style.
1.51 bowersj2 2857:
2858: =cut
2859:
2860: # Here are the tokens for the iterator:
2861:
1.222 bowersj2 2862: sub END_ITERATOR { return 0; }
1.51 bowersj2 2863: sub BEGIN_MAP { return 1; } # begining of a new map
2864: sub END_MAP { return 2; } # end of the map
2865: sub BEGIN_BRANCH { return 3; } # beginning of a branch
2866: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 2867: sub FORWARD { return 1; } # go forward
2868: sub BACKWARD { return 2; }
1.51 bowersj2 2869:
1.96 bowersj2 2870: sub min {
2871: (my $a, my $b) = @_;
2872: if ($a < $b) { return $a; } else { return $b; }
2873: }
2874:
1.94 bowersj2 2875: sub new {
2876: # magic invocation to create a class instance
2877: my $proto = shift;
2878: my $class = ref($proto) || $proto;
2879: my $self = {};
2880:
1.300 albertel 2881: weaken($self->{NAV_MAP} = shift);
1.94 bowersj2 2882: return undef unless ($self->{NAV_MAP});
2883:
2884: # Handle the parameters
2885: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
2886: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
2887:
2888: # If the given resources are just the ID of the resource, get the
2889: # objects
2890: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
2891: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
2892: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
2893: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
2894:
2895: $self->{FILTER} = shift;
2896:
2897: # A hash, used as a set, of resource already seen
2898: $self->{ALREADY_SEEN} = shift;
2899: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
2900: $self->{CONDITION} = shift;
2901:
1.116 bowersj2 2902: # Do we want to automatically follow "redirection" maps?
2903: $self->{FORCE_TOP} = shift;
2904:
1.162 bowersj2 2905: # Do we want to return the top-level map object (resource 0.0)?
2906: $self->{RETURN_0} = shift;
2907: # have we done that yet?
2908: $self->{HAVE_RETURNED_0} = 0;
2909:
1.94 bowersj2 2910: # Now, we need to pre-process the map, by walking forward and backward
2911: # over the parts of the map we're going to look at.
1.96 bowersj2 2912:
1.97 bowersj2 2913: # The processing steps are exactly the same, except for a few small
2914: # changes, so I bundle those up in the following list of two elements:
2915: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
2916: # first_resource).
2917: # This prevents writing nearly-identical code twice.
2918: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
2919: 'FIRST_RESOURCE'],
2920: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
2921: 'FINISH_RESOURCE'] );
2922:
1.98 bowersj2 2923: my $maxDepth = 0; # tracks max depth
2924:
1.116 bowersj2 2925: # If there is only one resource in this map, and it's a map, we
2926: # want to remember that, so the user can ask for the first map
2927: # that isn't just a redirector.
2928: my $resource; my $resourceCount = 0;
2929:
1.209 bowersj2 2930: # Documentation on this algorithm can be found in the CVS repository at
2931: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
2932: # in that file.
1.107 bowersj2 2933: # **1**
2934:
1.97 bowersj2 2935: foreach my $pass (@iterations) {
2936: my $direction = $pass->[0];
2937: my $valName = $pass->[1];
2938: my $nextResourceMethod = $pass->[2];
2939: my $firstResourceName = $pass->[3];
2940:
2941: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
2942: $self->{FIRST_RESOURCE},
2943: $self->{FINISH_RESOURCE},
2944: {}, undef, 0, $direction);
1.96 bowersj2 2945:
1.97 bowersj2 2946: # prime the recursion
2947: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
1.222 bowersj2 2948: $iterator->next();
1.97 bowersj2 2949: my $curRes = $iterator->next();
1.222 bowersj2 2950: my $depth = 1;
2951: while ($depth > 0) {
2952: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
2953: if ($curRes == $iterator->END_MAP()) { $depth--; }
2954:
1.97 bowersj2 2955: if (ref($curRes)) {
1.116 bowersj2 2956: # If there's only one resource, this will save it
1.117 bowersj2 2957: # we have to filter empty resources from consideration here,
2958: # or even "empty", redirecting maps have two (start & finish)
2959: # or three (start, finish, plus redirector)
2960: if($direction == FORWARD && $curRes->src()) {
2961: $resource = $curRes; $resourceCount++;
2962: }
1.97 bowersj2 2963: my $resultingVal = $curRes->{DATA}->{$valName};
2964: my $nextResources = $curRes->$nextResourceMethod();
1.116 bowersj2 2965: my $nextCount = scalar(@{$nextResources});
1.104 bowersj2 2966:
1.116 bowersj2 2967: if ($nextCount == 1) { # **3**
1.97 bowersj2 2968: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
2969: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
2970: }
2971:
1.116 bowersj2 2972: if ($nextCount > 1) { # **4**
1.97 bowersj2 2973: foreach my $res (@{$nextResources}) {
2974: my $current = $res->{DATA}->{$valName} || 999999999;
2975: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
2976: }
2977: }
2978: }
1.96 bowersj2 2979:
1.107 bowersj2 2980: # Assign the final val (**2**)
1.97 bowersj2 2981: if (ref($curRes) && $direction == BACKWARD()) {
1.98 bowersj2 2982: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
2983: $curRes->{DATA}->{BOT_UP_VAL});
2984:
2985: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
2986: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
1.190 bowersj2 2987: }
1.222 bowersj2 2988:
2989: $curRes = $iterator->next();
1.96 bowersj2 2990: }
2991: }
1.94 bowersj2 2992:
1.116 bowersj2 2993: # Check: Was this only one resource, a map?
1.255 albertel 2994: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
1.116 bowersj2 2995: my $firstResource = $resource->map_start();
2996: my $finishResource = $resource->map_finish();
2997: return
2998: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
2999: $finishResource, $self->{FILTER},
3000: $self->{ALREADY_SEEN},
1.314 albertel 3001: $self->{CONDITION},
3002: $self->{FORCE_TOP});
1.116 bowersj2 3003:
3004: }
3005:
1.98 bowersj2 3006: # Set up some bookkeeping information.
3007: $self->{CURRENT_DEPTH} = 0;
3008: $self->{MAX_DEPTH} = $maxDepth;
3009: $self->{STACK} = [];
3010: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1.222 bowersj2 3011: $self->{FINISHED} = 0; # When true, the iterator has finished
1.98 bowersj2 3012:
3013: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
3014: push @{$self->{STACK}}, [];
3015: }
3016:
1.107 bowersj2 3017: # Prime the recursion w/ the first resource **5**
1.98 bowersj2 3018: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
3019: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
3020:
3021: bless ($self);
3022:
3023: return $self;
3024: }
3025:
3026: sub next {
3027: my $self = shift;
1.256 albertel 3028: my $closeAllPages=shift;
1.222 bowersj2 3029: if ($self->{FINISHED}) {
3030: return END_ITERATOR();
3031: }
3032:
1.162 bowersj2 3033: # If we want to return the top-level map object, and haven't yet,
3034: # do so.
3035: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
3036: $self->{HAVE_RETURNED_0} = 1;
3037: return $self->{NAV_MAP}->getById('0.0');
3038: }
1.401 albertel 3039: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {
3040: $self->{HAVE_RETURNED_0_BEGIN_MAP} = 1;
3041: return $self->BEGIN_MAP();
3042: }
1.98 bowersj2 3043:
3044: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3045: # grab the next from the recursive iterator
1.256 albertel 3046: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
1.98 bowersj2 3047:
3048: # is it a begin or end map? If so, update the depth
3049: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3050: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3051:
3052: # Are we back at depth 0? If so, stop recursing
3053: if ($self->{RECURSIVE_DEPTH} == 0) {
3054: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3055: }
3056:
3057: return $next;
3058: }
3059:
3060: if (defined($self->{FORCE_NEXT})) {
3061: my $tmp = $self->{FORCE_NEXT};
3062: $self->{FORCE_NEXT} = undef;
3063: return $tmp;
3064: }
3065:
3066: # Have we not yet begun? If not, return BEGIN_MAP and
3067: # remember we've started.
3068: if ( !$self->{STARTED} ) {
3069: $self->{STARTED} = 1;
3070: return $self->BEGIN_MAP();
3071: }
3072:
3073: # Here's the guts of the iterator.
3074:
3075: # Find the next resource, if any.
3076: my $found = 0;
3077: my $i = $self->{MAX_DEPTH};
3078: my $newDepth;
3079: my $here;
3080: while ( $i >= 0 && !$found ) {
1.107 bowersj2 3081: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
3082: $here = pop @{$self->{STACK}->[$i]}; # **7**
1.98 bowersj2 3083: $found = 1;
3084: $newDepth = $i;
3085: }
3086: $i--;
3087: }
3088:
3089: # If we still didn't find anything, we're done.
3090: if ( !$found ) {
3091: # We need to get back down to the correct branch depth
3092: if ( $self->{CURRENT_DEPTH} > 0 ) {
3093: $self->{CURRENT_DEPTH}--;
3094: return END_BRANCH();
3095: } else {
1.222 bowersj2 3096: $self->{FINISHED} = 1;
1.98 bowersj2 3097: return END_MAP();
3098: }
3099: }
3100:
1.104 bowersj2 3101: # If this is not a resource, it must be an END_BRANCH marker we want
3102: # to return directly.
1.107 bowersj2 3103: if (!ref($here)) { # **8**
1.104 bowersj2 3104: if ($here == END_BRANCH()) { # paranoia, in case of later extension
3105: $self->{CURRENT_DEPTH}--;
3106: return $here;
3107: }
3108: }
3109:
3110: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
3111: $self->{HERE} = $here;
3112:
1.98 bowersj2 3113: # Get to the right level
3114: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
3115: push @{$self->{STACK}->[$newDepth]}, $here;
3116: $self->{CURRENT_DEPTH}--;
3117: return END_BRANCH();
3118: }
3119: if ( $self->{CURRENT_DEPTH} < $newDepth) {
3120: push @{$self->{STACK}->[$newDepth]}, $here;
3121: $self->{CURRENT_DEPTH}++;
3122: return BEGIN_BRANCH();
3123: }
3124:
3125: # If we made it here, we have the next resource, and we're at the
3126: # right branch level. So let's examine the resource for where
3127: # we can get to from here.
3128:
3129: # So we need to look at all the resources we can get to from here,
3130: # categorize them if we haven't seen them, remember if we have a new
3131: my $nextUnfiltered = $here->getNext();
1.104 bowersj2 3132: my $maxDepthAdded = -1;
3133:
1.98 bowersj2 3134: for (@$nextUnfiltered) {
3135: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
1.104 bowersj2 3136: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3137: push @{$self->{STACK}->[$depth]}, $_;
1.98 bowersj2 3138: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
1.104 bowersj2 3139: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
1.98 bowersj2 3140: }
3141: }
1.104 bowersj2 3142:
3143: # Is this the end of a branch? If so, all of the resources examined above
1.398 banghart 3144: # led to lower levels than the one we are currently at, so we push a END_BRANCH
1.104 bowersj2 3145: # marker onto the stack so we don't forget.
3146: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3147: # BC branch and gets to C, it will see F as the only next resource, but it's
3148: # one level lower. Thus, this is the end of the branch, since there are no
3149: # more resources added to this level or above.
1.111 bowersj2 3150: # We don't do this if the examined resource is the finish resource,
3151: # because the condition given above is true, but the "END_MAP" will
3152: # take care of things and we should already be at depth 0.
1.104 bowersj2 3153: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
1.111 bowersj2 3154: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
1.104 bowersj2 3155: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3156: }
3157:
1.98 bowersj2 3158: # That ends the main iterator logic. Now, do we want to recurse
3159: # down this map (if this resource is a map)?
1.256 albertel 3160: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
1.98 bowersj2 3161: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
3162: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3163: my $firstResource = $self->{HERE}->map_start();
3164: my $finishResource = $self->{HERE}->map_finish();
3165:
3166: $self->{RECURSIVE_ITERATOR} =
3167: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3168: $finishResource, $self->{FILTER},
1.314 albertel 3169: $self->{ALREADY_SEEN},
3170: $self->{CONDITION},
3171: $self->{FORCE_TOP});
1.98 bowersj2 3172: }
3173:
1.116 bowersj2 3174: # If this is a blank resource, don't actually return it.
1.117 bowersj2 3175: # Should you ever find you need it, make sure to add an option to the code
3176: # that you can use; other things depend on this behavior.
1.138 bowersj2 3177: my $browsePriv = $self->{HERE}->browsePriv();
3178: if (!$self->{HERE}->src() ||
3179: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
1.256 albertel 3180: return $self->next($closeAllPages);
1.116 bowersj2 3181: }
3182:
1.98 bowersj2 3183: return $self->{HERE};
3184:
3185: }
3186:
3187: =pod
3188:
1.174 albertel 3189: The other method available on the iterator is B<getStack>, which
3190: returns an array populated with the current 'stack' of maps, as
3191: references to the resource objects. Example: This is useful when
3192: making the navigation map, as we need to check whether we are under a
3193: page map to see if we need to link directly to the resource, or to the
3194: page. The first elements in the array will correspond to the top of
3195: the stack (most inclusive map).
1.98 bowersj2 3196:
3197: =cut
3198:
3199: sub getStack {
3200: my $self=shift;
3201:
3202: my @stack;
3203:
3204: $self->populateStack(\@stack);
3205:
3206: return \@stack;
3207: }
3208:
3209: # Private method: Calls the iterators recursively to populate the stack.
3210: sub populateStack {
3211: my $self=shift;
3212: my $stack = shift;
3213:
3214: push @$stack, $self->{HERE} if ($self->{HERE});
3215:
3216: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3217: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3218: }
1.94 bowersj2 3219: }
3220:
3221: 1;
3222:
3223: package Apache::lonnavmaps::DFSiterator;
1.365 albertel 3224: use Scalar::Util qw(weaken);
1.320 albertel 3225: use Apache::lonnet;
3226:
1.100 bowersj2 3227: # Not documented in the perldoc: This is a simple iterator that just walks
3228: # through the nav map and presents the resources in a depth-first search
3229: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3230: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3231: # useful for pre-processing of some kind, and is in fact used by the main
3232: # iterator that way, but that's about it.
3233: # One could imagine merging this into the init routine of the main iterator,
1.251 www 3234: # but this might as well be left separate, since it is possible some other
1.100 bowersj2 3235: # use might be found for it. - Jeremy
1.94 bowersj2 3236:
1.117 bowersj2 3237: # Unlike the main iterator, this DOES return all resources, even blank ones.
3238: # The main iterator needs them to correctly preprocess the map.
3239:
1.94 bowersj2 3240: sub BEGIN_MAP { return 1; } # begining of a new map
3241: sub END_MAP { return 2; } # end of the map
3242: sub FORWARD { return 1; } # go forward
3243: sub BACKWARD { return 2; }
3244:
1.100 bowersj2 3245: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3246: # filter hash ref (or undef), already seen hash or undef, condition
3247: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
1.51 bowersj2 3248: sub new {
3249: # magic invocation to create a class instance
3250: my $proto = shift;
3251: my $class = ref($proto) || $proto;
3252: my $self = {};
3253:
1.300 albertel 3254: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3255: return undef unless ($self->{NAV_MAP});
3256:
3257: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3258: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3259:
3260: # If the given resources are just the ID of the resource, get the
3261: # objects
3262: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3263: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3264: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3265: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3266:
3267: $self->{FILTER} = shift;
3268:
3269: # A hash, used as a set, of resource already seen
3270: $self->{ALREADY_SEEN} = shift;
1.140 bowersj2 3271: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 3272: $self->{CONDITION} = shift;
1.89 bowersj2 3273: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 3274:
1.100 bowersj2 3275: # Flag: Have we started yet?
1.51 bowersj2 3276: $self->{STARTED} = 0;
3277:
3278: # Should we continue calling the recursive iterator, if any?
3279: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3280: # The recursive iterator, if any
3281: $self->{RECURSIVE_ITERATOR} = undef;
3282: # Are we recursing on a map, or a branch?
3283: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3284: # And the count of how deep it is, so that this iterator can keep track of
3285: # when to pick back up again.
3286: $self->{RECURSIVE_DEPTH} = 0;
3287:
3288: # For keeping track of our branches, we maintain our own stack
1.100 bowersj2 3289: $self->{STACK} = [];
1.51 bowersj2 3290:
3291: # Start with the first resource
1.89 bowersj2 3292: if ($self->{DIRECTION} == FORWARD) {
1.100 bowersj2 3293: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
1.89 bowersj2 3294: } else {
1.100 bowersj2 3295: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 3296: }
1.51 bowersj2 3297:
3298: bless($self);
3299: return $self;
3300: }
3301:
3302: sub next {
3303: my $self = shift;
3304:
3305: # Are we using a recursive iterator? If so, pull from that and
3306: # watch the depth; we want to resume our level at the correct time.
1.98 bowersj2 3307: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
1.51 bowersj2 3308: # grab the next from the recursive iterator
3309: my $next = $self->{RECURSIVE_ITERATOR}->next();
3310:
3311: # is it a begin or end map? Update depth if so
3312: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3313: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3314:
3315: # Are we back at depth 0? If so, stop recursing.
3316: if ($self->{RECURSIVE_DEPTH} == 0) {
3317: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3318: }
3319:
3320: return $next;
3321: }
3322:
3323: # Is there a current resource to grab? If not, then return
1.100 bowersj2 3324: # END_MAP, which will end the iterator.
3325: if (scalar(@{$self->{STACK}}) == 0) {
3326: return $self->END_MAP();
1.51 bowersj2 3327: }
3328:
3329: # Have we not yet begun? If not, return BEGIN_MAP and
3330: # remember that we've started.
3331: if ( !$self->{STARTED} ) {
3332: $self->{STARTED} = 1;
3333: return $self->BEGIN_MAP;
3334: }
3335:
3336: # Get the next resource in the branch
1.100 bowersj2 3337: $self->{HERE} = pop @{$self->{STACK}};
1.52 bowersj2 3338:
1.100 bowersj2 3339: # remember that we've seen this, so we don't return it again later
1.51 bowersj2 3340: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3341:
3342: # Get the next possible resources
1.90 bowersj2 3343: my $nextUnfiltered;
1.89 bowersj2 3344: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 3345: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 3346: } else {
1.90 bowersj2 3347: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 3348: }
1.51 bowersj2 3349: my $next = [];
3350:
3351: # filter the next possibilities to remove things we've
1.100 bowersj2 3352: # already seen.
1.394 raeburn 3353: foreach my $item (@$nextUnfiltered) {
3354: if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
3355: push @$next, $item;
1.52 bowersj2 3356: }
1.51 bowersj2 3357: }
3358:
3359: while (@$next) {
1.100 bowersj2 3360: # copy the next possibilities over to the stack
3361: push @{$self->{STACK}}, shift @$next;
1.51 bowersj2 3362: }
3363:
3364: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 3365: if ($self->{HERE}->is_map() &&
1.63 bowersj2 3366: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 3367: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3368: my $firstResource = $self->{HERE}->map_start();
3369: my $finishResource = $self->{HERE}->map_finish();
3370:
3371: $self->{RECURSIVE_ITERATOR} =
1.94 bowersj2 3372: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 3373: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 bowersj2 3374: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 3375: }
3376:
3377: return $self->{HERE};
1.190 bowersj2 3378: }
3379:
3380: # Identical to the full iterator methods of the same name. Hate to copy/paste
3381: # but I also hate to "inherit" either iterator from the other.
3382:
3383: sub getStack {
3384: my $self=shift;
3385:
3386: my @stack;
3387:
3388: $self->populateStack(\@stack);
3389:
3390: return \@stack;
3391: }
3392:
3393: # Private method: Calls the iterators recursively to populate the stack.
3394: sub populateStack {
3395: my $self=shift;
3396: my $stack = shift;
3397:
3398: push @$stack, $self->{HERE} if ($self->{HERE});
3399:
3400: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3401: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3402: }
1.51 bowersj2 3403: }
3404:
1.1 www 3405: 1;
1.2 www 3406:
1.51 bowersj2 3407: package Apache::lonnavmaps::resource;
1.365 albertel 3408: use Scalar::Util qw(weaken);
1.51 bowersj2 3409: use Apache::lonnet;
3410:
3411: =pod
3412:
1.217 bowersj2 3413: =head1 Object: resource
1.51 bowersj2 3414:
1.217 bowersj2 3415: X<resource, navmap object>
1.174 albertel 3416: A resource object encapsulates a resource in a resource map, allowing
3417: easy manipulation of the resource, querying the properties of the
3418: resource (including user properties), and represents a reference that
3419: can be used as the canonical representation of the resource by
3420: lonnavmap clients like renderers.
3421:
3422: A resource only makes sense in the context of a navmap, as some of the
3423: data is stored in the navmap object.
3424:
3425: You will probably never need to instantiate this object directly. Use
3426: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
3427: starting resource.
1.51 bowersj2 3428:
1.188 bowersj2 3429: Resource objects respect the parameter_hiddenparts, which suppresses
3430: various parts according to the wishes of the map author. As of this
3431: writing, there is no way to override this parameter, and suppressed
3432: parts will never be returned, nor will their response types or ids be
3433: stored.
3434:
1.217 bowersj2 3435: =head2 Overview
1.51 bowersj2 3436:
1.217 bowersj2 3437: A B<Resource> is the most granular type of object in LON-CAPA that can
3438: be included in a course. It can either be a particular resource, like
3439: an HTML page, external resource, problem, etc., or it can be a
3440: container sequence, such as a "page" or a "map".
3441:
3442: To see a sequence from the user's point of view, please see the
3443: B<Creating a Course: Maps and Sequences> chapter of the Author's
3444: Manual.
3445:
3446: A Resource Object, once obtained from a navmap object via a B<getBy*>
3447: method of the navmap, or from an iterator, allows you to query
3448: information about that resource.
3449:
3450: Generally, you do not ever want to create a resource object yourself,
3451: so creation has been left undocumented. Always retrieve resources
3452: from navmap objects.
3453:
3454: =head3 Identifying Resources
3455:
3456: X<big hash>Every resource is identified by a Resource ID in the big hash that is
3457: unique to that resource for a given course. X<resource ID, in big hash>
3458: The Resource ID has the form #.#, where the first number is the same
3459: for every resource in a map, and the second is unique. For instance,
3460: for a course laid out like this:
3461:
3462: * Problem 1
3463: * Map
3464: * Resource 2
3465: * Resource 3
3466:
3467: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
3468: C<Resource 3> will share a first number. The second number may end up
3469: re-used between the two groups.
3470:
3471: The resource ID is only used in the big hash, but can be used in the
3472: context of a course to identify a resource easily. (For instance, the
3473: printing system uses it to record which resources from a sequence you
3474: wish to print.)
3475:
3476: X<symb> X<resource, symb>
3477: All resources also have B<symb>s, which uniquely identify a resource
3478: in a course. Many internal LON-CAPA functions expect a symb. A symb
3479: carries along with it the URL of the resource, and the map it appears
1.398 banghart 3480: in. Symbs are much larger than resource IDs.
1.51 bowersj2 3481:
3482: =cut
3483:
3484: sub new {
3485: # magic invocation to create a class instance
3486: my $proto = shift;
3487: my $class = ref($proto) || $proto;
3488: my $self = {};
3489:
1.300 albertel 3490: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3491: $self->{ID} = shift;
3492:
3493: # Store this new resource in the parent nav map's cache.
3494: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 3495: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 3496:
3497: # A hash that can be used by two-pass algorithms to store data
3498: # about this resource in. Not used by the resource object
3499: # directly.
3500: $self->{DATA} = {};
3501:
3502: bless($self);
3503:
3504: return $self;
3505: }
3506:
1.70 bowersj2 3507: # private function: simplify the NAV_HASH lookups we keep doing
3508: # pass the name, and to automatically append my ID, pass a true val on the
3509: # second param
3510: sub navHash {
3511: my $self = shift;
3512: my $param = shift;
3513: my $id = shift;
1.115 bowersj2 3514: return $self->{NAV_MAP}->navhash($param . ($id?$self->{ID}:""));
1.70 bowersj2 3515: }
3516:
1.51 bowersj2 3517: =pod
3518:
1.217 bowersj2 3519: =head2 Methods
1.70 bowersj2 3520:
1.217 bowersj2 3521: Once you have a resource object, here's what you can do with it:
3522:
3523: =head3 Attribute Retrieval
3524:
3525: Every resource has certain attributes that can be retrieved and used:
1.70 bowersj2 3526:
3527: =over 4
3528:
1.217 bowersj2 3529: =item * B<ID>: Every resource has an ID that is unique for that
3530: resource in the course it is in. The ID is actually in the hash
3531: representing the resource, so for a resource object $res, obtain
3532: it via C<$res->{ID}).
3533:
1.174 albertel 3534: =item * B<compTitle>:
3535:
3536: Returns a "composite title", that is equal to $res->title() if the
3537: resource has a title, and is otherwise the last part of the URL (e.g.,
3538: "problem.problem").
3539:
3540: =item * B<ext>:
3541:
3542: Returns true if the resource is external.
3543:
3544: =item * B<kind>:
3545:
3546: Returns the kind of the resource from the compiled nav map.
3547:
3548: =item * B<randomout>:
1.106 bowersj2 3549:
1.174 albertel 3550: Returns true if this resource was chosen to NOT be shown to the user
3551: by the random map selection feature. In other words, this is usually
3552: false.
1.70 bowersj2 3553:
1.174 albertel 3554: =item * B<randompick>:
1.70 bowersj2 3555:
1.400 albertel 3556: Returns the number of randomly picked items for a map if the randompick
3557: feature is being used on the map.
3558:
3559: =item * B<randomorder>:
3560:
3561: Returns true for a map if the randomorder feature is being used on the
3562: map.
1.70 bowersj2 3563:
1.174 albertel 3564: =item * B<src>:
1.51 bowersj2 3565:
1.174 albertel 3566: Returns the source for the resource.
1.70 bowersj2 3567:
1.174 albertel 3568: =item * B<symb>:
1.70 bowersj2 3569:
1.174 albertel 3570: Returns the symb for the resource.
1.70 bowersj2 3571:
1.174 albertel 3572: =item * B<title>:
1.70 bowersj2 3573:
1.174 albertel 3574: Returns the title of the resource.
3575:
1.51 bowersj2 3576: =back
3577:
3578: =cut
3579:
3580: # These info functions can be used directly, as they don't return
3581: # resource information.
1.85 bowersj2 3582: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.303 albertel 3583: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
1.70 bowersj2 3584: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 3585: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.217 bowersj2 3586: # considered private and undocumented
1.51 bowersj2 3587: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
3588: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 3589: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
3590: sub randompick {
3591: my $self = shift;
1.410 raeburn 3592: my $randompick = $self->parmval('randompick');
3593: return $randompick;
1.68 bowersj2 3594: }
1.400 albertel 3595: sub randomorder {
3596: my $self = shift;
1.410 raeburn 3597: my $randomorder = $self->parmval('randomorder');
3598: return ($randomorder =~ /^yes$/i);
1.400 albertel 3599: }
1.303 albertel 3600: sub link {
3601: my $self=shift;
3602: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
3603: return $self->src;
3604: }
1.51 bowersj2 3605: sub src {
3606: my $self=shift;
3607: return $self->navHash("src_", 1);
3608: }
1.303 albertel 3609: sub shown_symb {
3610: my $self=shift;
3611: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->symb());}
3612: return $self->symb();
3613: }
1.328 www 3614: sub id {
3615: my $self=shift;
3616: return $self->{ID};
3617: }
3618: sub enclosing_map_src {
3619: my $self=shift;
3620: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3621: return $self->navHash('map_id_'.$first);
3622: }
1.51 bowersj2 3623: sub symb {
3624: my $self=shift;
3625: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
3626: my $symbSrc = &Apache::lonnet::declutter($self->src());
1.223 albertel 3627: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
1.51 bowersj2 3628: . '___' . $second . '___' . $symbSrc;
1.223 albertel 3629: return &Apache::lonnet::symbclean($symb);
1.51 bowersj2 3630: }
1.321 raeburn 3631: sub wrap_symb {
3632: my $self = shift;
3633: return $self->{NAV_MAP}->wrap_symb($self->symb());
3634: }
1.213 bowersj2 3635: sub title {
3636: my $self=shift;
3637: if ($self->{ID} eq '0.0') {
3638: # If this is the top-level map, return the title of the course
3639: # since this map can not be titled otherwise.
1.320 albertel 3640: return $env{'course.'.$env{'request.course.id'}.'.description'};
1.213 bowersj2 3641: }
3642: return $self->navHash("title_", 1); }
1.217 bowersj2 3643: # considered private and undocumented
1.70 bowersj2 3644: sub to { my $self=shift; return $self->navHash("to_", 1); }
1.301 albertel 3645: sub condition {
3646: my $self=shift;
3647: my $undercond=$self->navHash("undercond_", 1);
3648: if (!defined($undercond)) { return 1; };
3649: my $condid=$self->navHash("condid_$undercond");
3650: if (!defined($condid)) { return 1; };
3651: my $condition=&Apache::lonnet::directcondval($condid);
3652: return $condition;
3653: }
1.342 albertel 3654: sub condval {
3655: my $self=shift;
1.359 albertel 3656: my ($pathname,$filename) =
3657: &Apache::lonnet::split_uri_for_cond($self->src());
1.342 albertel 3658:
3659: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3660: /\&\Q$filename\E\:([\d\|]+)\&/);
3661: if ($match) {
3662: return &Apache::lonnet::condval($1);
3663: }
3664: return 0;
3665: }
1.106 bowersj2 3666: sub compTitle {
3667: my $self = shift;
3668: my $title = $self->title();
1.176 www 3669: $title=~s/\&colon\;/\:/gs;
1.106 bowersj2 3670: if (!$title) {
3671: $title = $self->src();
3672: $title = substr($title, rindex($title, '/') + 1);
3673: }
3674: return $title;
3675: }
1.399 albertel 3676:
1.70 bowersj2 3677: =pod
3678:
3679: B<Predicate Testing the Resource>
3680:
3681: These methods are shortcuts to deciding if a given resource has a given property.
3682:
3683: =over 4
3684:
1.174 albertel 3685: =item * B<is_map>:
3686:
3687: Returns true if the resource is a map type.
3688:
3689: =item * B<is_problem>:
1.70 bowersj2 3690:
1.174 albertel 3691: Returns true if the resource is a problem type, false
3692: otherwise. (Looks at the extension on the src field; might need more
3693: to work correctly.)
1.70 bowersj2 3694:
1.174 albertel 3695: =item * B<is_page>:
1.70 bowersj2 3696:
1.174 albertel 3697: Returns true if the resource is a page.
3698:
3699: =item * B<is_sequence>:
3700:
3701: Returns true if the resource is a sequence.
1.70 bowersj2 3702:
3703: =back
3704:
3705: =cut
3706:
1.256 albertel 3707: sub hasResource {
3708: my $self = shift;
3709: return $self->{NAV_MAP}->hasResource(@_);
3710: }
3711:
3712: sub retrieveResources {
3713: my $self = shift;
3714: return $self->{NAV_MAP}->retrieveResources(@_);
3715: }
1.70 bowersj2 3716:
1.369 albertel 3717: sub is_exam {
3718: my ($self,$part) = @_;
1.410 raeburn 3719: my $type = $self->parmval('type',$part);
3720: if ($type eq 'exam') {
1.369 albertel 3721: return 1;
3722: }
3723: if ($self->src() =~ /\.(exam)$/) {
3724: return 1;
3725: }
3726: return 0;
3727: }
1.70 bowersj2 3728: sub is_html {
1.51 bowersj2 3729: my $self=shift;
3730: my $src = $self->src();
1.70 bowersj2 3731: return ($src =~ /html$/);
1.51 bowersj2 3732: }
1.70 bowersj2 3733: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
3734: sub is_page {
1.51 bowersj2 3735: my $self=shift;
3736: my $src = $self->src();
1.205 bowersj2 3737: return $self->navHash("is_map_", 1) &&
3738: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
1.51 bowersj2 3739: }
1.361 albertel 3740: sub is_practice {
3741: my $self=shift;
3742: my ($part) = @_;
1.410 raeburn 3743: my $type = $self->parmval('type',$part);
3744: if ($type eq 'practice') {
1.361 albertel 3745: return 1;
3746: }
3747: return 0;
3748: }
1.70 bowersj2 3749: sub is_problem {
1.51 bowersj2 3750: my $self=shift;
3751: my $src = $self->src();
1.361 albertel 3752: if ($src =~ /\.(problem|exam|quiz|assess|survey|form|library|task)$/) {
3753: return !($self->is_practice());
3754: }
3755: return 0;
1.256 albertel 3756: }
1.413 www 3757: sub is_raw_problem {
3758: my $self=shift;
3759: my $src = $self->src();
3760: if ($src =~ /\.(problem|exam|quiz|assess|survey|form|library|task)$/) {
3761: return 1;
3762: }
3763: return 0;
3764: }
3765:
1.256 albertel 3766: sub contains_problem {
3767: my $self=shift;
3768: if ($self->is_page()) {
3769: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
3770: return $hasProblem;
3771: }
3772: return 0;
1.51 bowersj2 3773: }
1.401 albertel 3774: sub map_contains_problem {
3775: my $self=shift;
3776: if ($self->is_map()) {
3777: my $has_problem=
3778: $self->hasResource($self,sub { $_[0]->is_problem() },1);
3779: return $has_problem;
3780: }
3781: return 0;
3782: }
1.70 bowersj2 3783: sub is_sequence {
1.51 bowersj2 3784: my $self=shift;
1.205 bowersj2 3785: return $self->navHash("is_map_", 1) &&
3786: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
1.51 bowersj2 3787: }
1.261 matthew 3788: sub is_survey {
3789: my $self = shift();
3790: my $part = shift();
1.410 raeburn 3791: my $type = $self->parmval('type',$part);
3792: if ($type eq 'survey') {
1.261 matthew 3793: return 1;
3794: }
1.263 albertel 3795: if ($self->src() =~ /\.(survey)$/) {
1.261 matthew 3796: return 1;
3797: }
3798: return 0;
3799: }
1.360 albertel 3800: sub is_task {
3801: my $self=shift;
3802: my $src = $self->src();
3803: return ($src =~ /\.(task)$/)
3804: }
1.51 bowersj2 3805:
1.266 raeburn 3806: sub is_empty_sequence {
3807: my $self=shift;
3808: my $src = $self->src();
3809: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
3810: }
3811:
1.101 bowersj2 3812: # Private method: Shells out to the parmval in the nav map, handler parts.
1.51 bowersj2 3813: sub parmval {
3814: my $self = shift;
3815: my $what = shift;
1.185 bowersj2 3816: my $part = shift;
3817: if (!defined($part)) {
3818: $part = '0';
3819: }
1.51 bowersj2 3820: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
3821: }
3822:
1.70 bowersj2 3823: =pod
3824:
3825: B<Map Methods>
3826:
1.174 albertel 3827: These methods are useful for getting information about the map
3828: properties of the resource, if the resource is a map (B<is_map>).
1.70 bowersj2 3829:
3830: =over 4
3831:
1.174 albertel 3832: =item * B<map_finish>:
3833:
3834: Returns a reference to a resource object corresponding to the finish
3835: resource of the map.
1.70 bowersj2 3836:
1.174 albertel 3837: =item * B<map_pc>:
1.70 bowersj2 3838:
1.174 albertel 3839: Returns the pc value of the map, which is the first number that
3840: appears in the resource ID of the resources in the map, and is the
3841: number that appears around the middle of the symbs of the resources in
3842: that map.
1.70 bowersj2 3843:
1.174 albertel 3844: =item * B<map_start>:
3845:
3846: Returns a reference to a resource object corresponding to the start
3847: resource of the map.
3848:
3849: =item * B<map_type>:
3850:
3851: Returns a string with the type of the map in it.
1.70 bowersj2 3852:
3853: =back
1.51 bowersj2 3854:
1.70 bowersj2 3855: =cut
1.51 bowersj2 3856:
3857: sub map_finish {
3858: my $self = shift;
3859: my $src = $self->src();
1.381 albertel 3860: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 3861: my $res = $self->navHash("map_finish_$src", 0);
3862: $res = $self->{NAV_MAP}->getById($res);
3863: return $res;
3864: }
1.70 bowersj2 3865: sub map_pc {
3866: my $self = shift;
1.381 albertel 3867: my $src = $self->src();
1.70 bowersj2 3868: return $self->navHash("map_pc_$src", 0);
3869: }
1.51 bowersj2 3870: sub map_start {
3871: my $self = shift;
3872: my $src = $self->src();
1.381 albertel 3873: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 3874: my $res = $self->navHash("map_start_$src", 0);
3875: $res = $self->{NAV_MAP}->getById($res);
3876: return $res;
3877: }
3878: sub map_type {
3879: my $self = shift;
3880: my $pc = $self->map_pc();
3881: return $self->navHash("map_type_$pc", 0);
3882: }
3883:
3884: #####
3885: # Property queries
3886: #####
3887:
3888: # These functions will be responsible for returning the CORRECT
3889: # VALUE for the parameter, no matter what. So while they may look
1.398 banghart 3890: # like direct calls to parmval, they can be more than that.
1.51 bowersj2 3891: # So, for instance, the duedate function should use the "duedatetype"
1.398 banghart 3892: # information, rather than the resource object user.
1.51 bowersj2 3893:
3894: =pod
3895:
3896: =head2 Resource Parameters
3897:
1.174 albertel 3898: In order to use the resource parameters correctly, the nav map must
3899: have been instantiated with genCourseAndUserOptions set to true, so
3900: the courseopt and useropt is read correctly. Then, you can call these
3901: functions to get the relevant parameters for the resource. Each
3902: function defaults to part "0", but can be directed to another part by
3903: passing the part as the parameter.
3904:
3905: These methods are responsible for getting the parameter correct, not
3906: merely reflecting the contents of the GDBM hashes. As we move towards
3907: dates relative to other dates, these methods should be updated to
3908: reflect that. (Then, anybody using these methods will not have to update
3909: their code.)
3910:
3911: =over 4
3912:
3913: =item * B<acc>:
3914:
3915: Get the Client IP/Name Access Control information.
1.51 bowersj2 3916:
1.174 albertel 3917: =item * B<answerdate>:
1.51 bowersj2 3918:
1.174 albertel 3919: Get the answer-reveal date for the problem.
3920:
1.211 bowersj2 3921: =item * B<awarded>:
3922:
3923: Gets the awarded value for the problem part. Requires genUserData set to
3924: true when the navmap object was created.
3925:
1.174 albertel 3926: =item * B<duedate>:
3927:
3928: Get the due date for the problem.
3929:
3930: =item * B<tries>:
3931:
3932: Get the number of tries the student has used on the problem.
3933:
3934: =item * B<maxtries>:
3935:
3936: Get the number of max tries allowed.
3937:
3938: =item * B<opendate>:
1.51 bowersj2 3939:
1.174 albertel 3940: Get the open date for the problem.
1.51 bowersj2 3941:
1.174 albertel 3942: =item * B<sig>:
1.51 bowersj2 3943:
1.174 albertel 3944: Get the significant figures setting.
1.51 bowersj2 3945:
1.174 albertel 3946: =item * B<tol>:
1.51 bowersj2 3947:
1.174 albertel 3948: Get the tolerance for the problem.
1.51 bowersj2 3949:
1.174 albertel 3950: =item * B<tries>:
1.51 bowersj2 3951:
1.174 albertel 3952: Get the number of tries the user has already used on the problem.
1.51 bowersj2 3953:
1.174 albertel 3954: =item * B<type>:
1.51 bowersj2 3955:
1.174 albertel 3956: Get the question type for the problem.
1.70 bowersj2 3957:
1.174 albertel 3958: =item * B<weight>:
1.51 bowersj2 3959:
1.174 albertel 3960: Get the weight for the problem.
1.51 bowersj2 3961:
3962: =back
3963:
3964: =cut
3965:
3966: sub acc {
3967: (my $self, my $part) = @_;
1.410 raeburn 3968: my $acc = $self->parmval("acc", $part);
3969: return $acc;
1.51 bowersj2 3970: }
3971: sub answerdate {
3972: (my $self, my $part) = @_;
3973: # Handle intervals
1.410 raeburn 3974: my $answerdatetype = $self->parmval("answerdate.type", $part);
3975: my $answerdate = $self->parmval("answerdate", $part);
3976: my $duedate = $self->parmval("duedate", $part);
3977: if ($answerdatetype eq 'date_interval') {
3978: $answerdate = $duedate + $answerdate;
1.51 bowersj2 3979: }
1.410 raeburn 3980: return $answerdate;
1.106 bowersj2 3981: }
1.211 bowersj2 3982: sub awarded {
3983: my $self = shift; my $part = shift;
1.221 bowersj2 3984: $self->{NAV_MAP}->get_user_data();
1.211 bowersj2 3985: if (!defined($part)) { $part = '0'; }
3986: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};
3987: }
1.423.4.1 gci 3988: sub taskversion {
3989: my $self = shift; my $part = shift;
3990: $self->{NAV_MAP}->get_user_data();
3991: if (!defined($part)) { $part = '0'; }
3992: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.version'};
3993: }
3994: sub taskstatus {
3995: my $self = shift; my $part = shift;
3996: $self->{NAV_MAP}->get_user_data();
3997: if (!defined($part)) { $part = '0'; }
3998: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$self->taskversion($part).'.'.$part.'.status'};
3999: }
4000: sub solved {
4001: my $self = shift; my $part = shift;
4002: $self->{NAV_MAP}->get_user_data();
4003: if (!defined($part)) { $part = '0'; }
4004: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.solved'};
4005: }
4006: sub checkedin {
4007: my $self = shift; my $part = shift;
4008: $self->{NAV_MAP}->get_user_data();
4009: if (!defined($part)) { $part = '0'; }
4010: if ($self->is_task()) {
4011: my $version = $self->taskversion($part);
4012: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$version .'.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$version .'.'.$part.'.checkedin.slot'});
4013: } else {
4014: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.checkedin.slot'});
4015: }
4016: }
1.382 albertel 4017: # this should work exactly like the copy in lonhomework.pm
1.51 bowersj2 4018: sub duedate {
4019: (my $self, my $part) = @_;
1.382 albertel 4020: my $date;
1.406 albertel 4021: my @interval=$self->parmval("interval", $part);
1.382 albertel 4022: my $due_date=$self->parmval("duedate", $part);
1.406 albertel 4023: if ($interval[0] =~ /\d+/) {
4024: my $first_access=&Apache::lonnet::get_first_access($interval[1],
4025: $self->symb);
1.382 albertel 4026: if (defined($first_access)) {
1.406 albertel 4027: my $interval = $first_access+$interval[0];
1.404 albertel 4028: $date = (!$due_date || $interval < $due_date) ? $interval
4029: : $due_date;
1.382 albertel 4030: } else {
4031: $date = $due_date;
4032: }
4033: } else {
4034: $date = $due_date;
1.260 albertel 4035: }
1.382 albertel 4036: return $date;
1.51 bowersj2 4037: }
1.334 albertel 4038: sub handgrade {
4039: (my $self, my $part) = @_;
1.399 albertel 4040: my @response_ids = $self->responseIds($part);
4041: if (@response_ids) {
4042: foreach my $response_id (@response_ids) {
1.410 raeburn 4043: my $handgrade = $self->parmval("handgrade",$part.'_'.$response_id);
4044: if (lc($handgrade) eq 'yes') {
1.399 albertel 4045: return 'yes';
4046: }
4047: }
4048: }
1.410 raeburn 4049: my $handgrade = $self->parmval("handgrade", $part);
4050: return $handgrade;
1.334 albertel 4051: }
1.51 bowersj2 4052: sub maxtries {
4053: (my $self, my $part) = @_;
1.410 raeburn 4054: my $maxtries = $self->parmval("maxtries", $part);
4055: return $maxtries;
1.51 bowersj2 4056: }
4057: sub opendate {
4058: (my $self, my $part) = @_;
1.410 raeburn 4059: my $opendatetype = $self->parmval("opendate.type", $part);
4060: my $opendate = $self->parmval("opendate", $part);
4061: if ($opendatetype eq 'date_interval') {
4062: my $duedate = $self->duedate($part);
4063: $opendate = $duedate - $opendate;
1.51 bowersj2 4064: }
1.410 raeburn 4065: return $opendate;
1.51 bowersj2 4066: }
1.185 bowersj2 4067: sub problemstatus {
4068: (my $self, my $part) = @_;
1.410 raeburn 4069: my $problemstatus = $self->parmval("problemstatus", $part);
4070: return lc($problemstatus);
1.185 bowersj2 4071: }
1.51 bowersj2 4072: sub sig {
4073: (my $self, my $part) = @_;
1.410 raeburn 4074: my $sig = $self->parmval("sig", $part);
4075: return $sig;
1.51 bowersj2 4076: }
4077: sub tol {
4078: (my $self, my $part) = @_;
1.410 raeburn 4079: my $tol = $self->parmval("tol", $part);
4080: return $tol;
1.51 bowersj2 4081: }
1.410 raeburn 4082: sub tries {
1.108 bowersj2 4083: my $self = shift;
4084: my $tries = $self->queryRestoreHash('tries', shift);
4085: if (!defined($tries)) { return '0';}
1.51 bowersj2 4086: return $tries;
4087: }
1.70 bowersj2 4088: sub type {
4089: (my $self, my $part) = @_;
1.410 raeburn 4090: my $type = $self->parmval("type", $part);
4091: return $type;
1.70 bowersj2 4092: }
1.109 bowersj2 4093: sub weight {
4094: my $self = shift; my $part = shift;
1.211 bowersj2 4095: if (!defined($part)) { $part = '0'; }
1.409 raeburn 4096: my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
4097: $self->symb(), $env{'user.domain'},
4098: $env{'user.name'},
4099: $env{'request.course.sec'});
4100: return $weight;
1.274 matthew 4101: }
4102: sub part_display {
4103: my $self= shift(); my $partID = shift();
4104: if (! defined($partID)) { $partID = '0'; }
4105: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
4106: $self->symb);
4107: if (! defined($display) || $display eq '') {
4108: $display = $partID;
4109: }
4110: return $display;
1.70 bowersj2 4111: }
1.423.4.1 gci 4112: sub slot_control {
4113: my $self=shift(); my $part = shift();
4114: if (!defined($part)) { $part = '0'; }
4115: my $useslots = $self->parmval("useslots", $part);
4116: my $availablestudent = $self->parmval("availablestudent", $part);
4117: my $available = $self->parmval("available", $part);
4118: return ($useslots,$availablestudent,$available);
4119: }
1.51 bowersj2 4120:
4121: # Multiple things need this
4122: sub getReturnHash {
4123: my $self = shift;
4124:
4125: if (!defined($self->{RETURN_HASH})) {
1.84 bowersj2 4126: my %tmpHash = &Apache::lonnet::restore($self->symb());
1.51 bowersj2 4127: $self->{RETURN_HASH} = \%tmpHash;
4128: }
4129: }
4130:
4131: ######
4132: # Status queries
4133: ######
4134:
4135: # These methods query the status of problems.
4136:
4137: # If we need to count parts, this function determines the number of
4138: # parts from the metadata. When called, it returns a reference to a list
4139: # of strings corresponding to the parts. (Thus, using it in a scalar context
4140: # tells you how many parts you have in the problem:
4141: # $partcount = scalar($resource->countParts());
4142: # Don't use $self->{PARTS} directly because you don't know if it's been
4143: # computed yet.
4144:
4145: =pod
4146:
4147: =head2 Resource misc
4148:
4149: Misc. functions for the resource.
4150:
4151: =over 4
4152:
1.174 albertel 4153: =item * B<hasDiscussion>:
1.59 bowersj2 4154:
1.174 albertel 4155: Returns a false value if there has been discussion since the user last
4156: logged in, true if there has. Always returns false if the discussion
4157: data was not extracted when the nav map was constructed.
4158:
1.366 albertel 4159: =item * B<last_post_time>:
4160:
4161: Returns a false value if there hasn't been discussion otherwise returns
4162: unix timestamp of last time a discussion posting (or edit) was made.
4163:
1.393 raeburn 4164: =item * B<discussion_info>:
1.366 albertel 4165:
1.393 raeburn 4166: optional argument is a filter (currently can be 'unread');
4167: returns in scalar context the count of the number of discussion postings.
1.366 albertel 4168:
4169: returns in list context both the count of postings and a hash ref
1.393 raeburn 4170: containing information about the postings (subject, id, timestamp) in a hash.
4171:
4172: 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.
1.366 albertel 4173:
1.174 albertel 4174: =item * B<getFeedback>:
4175:
4176: Gets the feedback for the resource and returns the raw feedback string
4177: for the resource, or the null string if there is no feedback or the
4178: email data was not extracted when the nav map was constructed. Usually
4179: used like this:
1.59 bowersj2 4180:
1.394 raeburn 4181: for my $url (split(/\,/, $res->getFeedback())) {
4182: my $link = &escape($url);
1.59 bowersj2 4183: ...
4184:
4185: and use the link as appropriate.
4186:
4187: =cut
4188:
4189: sub hasDiscussion {
4190: my $self = shift;
4191: return $self->{NAV_MAP}->hasDiscussion($self->symb());
4192: }
4193:
1.366 albertel 4194: sub last_post_time {
4195: my $self = shift;
4196: return $self->{NAV_MAP}->last_post_time($self->symb());
4197: }
4198:
1.393 raeburn 4199: sub discussion_info {
4200: my ($self,$filter) = @_;
4201: return $self->{NAV_MAP}->discussion_info($self->symb(),$filter);
1.366 albertel 4202: }
4203:
1.59 bowersj2 4204: sub getFeedback {
4205: my $self = shift;
1.124 bowersj2 4206: my $source = $self->src();
1.395 raeburn 4207: my $symb = $self->symb();
1.125 bowersj2 4208: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4209: return $self->{NAV_MAP}->getFeedback($symb,$source);
1.124 bowersj2 4210: }
4211:
4212: sub getErrors {
4213: my $self = shift;
4214: my $source = $self->src();
1.395 raeburn 4215: my $symb = $self->symb();
1.124 bowersj2 4216: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4217: return $self->{NAV_MAP}->getErrors($symb,$source);
1.59 bowersj2 4218: }
4219:
4220: =pod
4221:
1.174 albertel 4222: =item * B<parts>():
1.51 bowersj2 4223:
1.174 albertel 4224: Returns a list reference containing sorted strings corresponding to
1.193 bowersj2 4225: each part of the problem. Single part problems have only a part '0'.
4226: Multipart problems do not return their part '0', since they typically
4227: do not really matter.
1.174 albertel 4228:
4229: =item * B<countParts>():
4230:
4231: Returns the number of parts of the problem a student can answer. Thus,
4232: for single part problems, returns 1. For multipart, it returns the
1.193 bowersj2 4233: number of parts in the problem, not including psuedo-part 0.
1.51 bowersj2 4234:
1.290 matthew 4235: =item * B<countResponses>():
4236:
4237: Returns the total number of responses in the problem a student can answer.
4238:
4239: =item * B<responseTypes>():
4240:
4241: Returns a hash whose keys are the response types. The values are the number
4242: of times each response type is used. This is for the I<entire> problem, not
4243: just a single part.
4244:
1.192 bowersj2 4245: =item * B<multipart>():
4246:
1.193 bowersj2 4247: Returns true if the problem is multipart, false otherwise. Use this instead
4248: of countParts if all you want is multipart/not multipart.
1.192 bowersj2 4249:
1.187 bowersj2 4250: =item * B<responseType>($part):
4251:
4252: Returns the response type of the part, without the word "response" on the
4253: end. Example return values: 'string', 'essay', 'numeric', etc.
4254:
1.193 bowersj2 4255: =item * B<responseIds>($part):
1.187 bowersj2 4256:
1.193 bowersj2 4257: Retreives the response IDs for the given part as an array reference containing
4258: strings naming the response IDs. This may be empty.
1.187 bowersj2 4259:
1.51 bowersj2 4260: =back
4261:
4262: =cut
4263:
4264: sub parts {
4265: my $self = shift;
4266:
1.192 bowersj2 4267: if ($self->ext) { return []; }
1.67 bowersj2 4268:
1.51 bowersj2 4269: $self->extractParts();
4270: return $self->{PARTS};
4271: }
4272:
4273: sub countParts {
4274: my $self = shift;
4275:
4276: my $parts = $self->parts();
1.191 bowersj2 4277:
4278: # If I left this here, then it's not necessary.
4279: #my $delta = 0;
4280: #for my $part (@$parts) {
4281: # if ($part eq '0') { $delta--; }
4282: #}
1.66 bowersj2 4283:
4284: if ($self->{RESOURCE_ERROR}) {
4285: return 0;
4286: }
4287:
1.191 bowersj2 4288: return scalar(@{$parts}); # + $delta;
1.192 bowersj2 4289: }
4290:
1.290 matthew 4291: sub countResponses {
4292: my $self = shift;
4293: my $count;
1.293 matthew 4294: foreach my $part (@{$self->parts()}) {
4295: $count+= scalar($self->responseIds($part));
1.290 matthew 4296: }
4297: return $count;
4298: }
4299:
4300: sub responseTypes {
4301: my $self = shift;
1.291 albertel 4302: my %responses;
1.368 raeburn 4303: foreach my $part (@{$self->parts()}) {
1.290 matthew 4304: foreach my $responsetype ($self->responseType($part)) {
1.291 albertel 4305: $responses{$responsetype}++ if (defined($responsetype));
1.290 matthew 4306: }
4307: }
1.291 albertel 4308: return %responses;
1.290 matthew 4309: }
4310:
1.192 bowersj2 4311: sub multipart {
4312: my $self = shift;
4313: return $self->countParts() > 1;
1.51 bowersj2 4314: }
4315:
1.225 bowersj2 4316: sub singlepart {
4317: my $self = shift;
4318: return $self->countParts() == 1;
4319: }
4320:
1.187 bowersj2 4321: sub responseType {
1.184 bowersj2 4322: my $self = shift;
4323: my $part = shift;
4324:
4325: $self->extractParts();
1.235 albertel 4326: if (defined($self->{RESPONSE_TYPES}->{$part})) {
4327: return @{$self->{RESPONSE_TYPES}->{$part}};
4328: } else {
4329: return undef;
4330: }
1.187 bowersj2 4331: }
4332:
1.193 bowersj2 4333: sub responseIds {
1.187 bowersj2 4334: my $self = shift;
4335: my $part = shift;
4336:
4337: $self->extractParts();
1.235 albertel 4338: if (defined($self->{RESPONSE_IDS}->{$part})) {
4339: return @{$self->{RESPONSE_IDS}->{$part}};
4340: } else {
4341: return undef;
4342: }
1.184 bowersj2 4343: }
4344:
4345: # Private function: Extracts the parts information, both part names and
1.187 bowersj2 4346: # part types, and saves it.
1.51 bowersj2 4347: sub extractParts {
4348: my $self = shift;
4349:
1.153 bowersj2 4350: return if (defined($self->{PARTS}));
1.67 bowersj2 4351: return if ($self->ext);
1.51 bowersj2 4352:
4353: $self->{PARTS} = [];
4354:
1.181 bowersj2 4355: my %parts;
4356:
1.82 bowersj2 4357: # Retrieve part count, if this is a problem
4358: if ($self->is_problem()) {
1.240 albertel 4359: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
1.152 matthew 4360: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
1.181 bowersj2 4361:
1.239 bowersj2 4362: if ($partorder) {
4363: my @parts;
4364: for my $part (split (/,/,$partorder)) {
4365: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4366: push @parts, $part;
1.241 albertel 4367: $parts{$part} = 1;
1.239 bowersj2 4368: }
4369: }
4370: $self->{PARTS} = \@parts;
4371: } else {
4372: if (!$metadata) {
4373: $self->{RESOURCE_ERROR} = 1;
4374: $self->{PARTS} = [];
4375: $self->{PART_TYPE} = {};
4376: return;
4377: }
1.394 raeburn 4378: foreach my $entry (split(/\,/,$metadata)) {
4379: if ($entry =~ /^(?:part|Task)_(.*)$/) {
1.239 bowersj2 4380: my $part = $1;
4381: # This floods the logs if it blows up
4382: if (defined($parts{$part})) {
1.241 albertel 4383: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
4384: }
1.239 bowersj2 4385:
4386: # check to see if part is turned off.
4387:
4388: if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
4389: $parts{$part} = 1;
4390: }
4391: }
4392: }
4393: my @sortedParts = sort keys %parts;
4394: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 4395: }
1.82 bowersj2 4396:
1.187 bowersj2 4397:
1.284 matthew 4398: # These hashes probably do not need names that end with "Hash"....
1.187 bowersj2 4399: my %responseIdHash;
4400: my %responseTypeHash;
4401:
1.189 bowersj2 4402:
4403: # Init the responseIdHash
1.394 raeburn 4404: foreach my $part (@{$self->{PARTS}}) {
4405: $responseIdHash{$part} = [];
1.189 bowersj2 4406: }
4407:
1.187 bowersj2 4408: # Now, the unfortunate thing about this is that parts, part name, and
1.239 bowersj2 4409: # response id are delimited by underscores, but both the part
1.187 bowersj2 4410: # name and response id can themselves have underscores in them.
4411: # So we have to use our knowlege of part names to figure out
4412: # where the part names begin and end, and even then, it is possible
4413: # to construct ambiguous situations.
1.379 albertel 4414: foreach my $data (split /,/, $metadata) {
4415: if ($data =~ /^([a-zA-Z]+)response_(.*)/
4416: || $data =~ /^(Task)_(.*)/) {
1.187 bowersj2 4417: my $responseType = $1;
4418: my $partStuff = $2;
4419: my $partIdSoFar = '';
4420: my @partChunks = split /_/, $partStuff;
4421: my $i = 0;
4422: for ($i = 0; $i < scalar(@partChunks); $i++) {
4423: if ($partIdSoFar) { $partIdSoFar .= '_'; }
4424: $partIdSoFar .= $partChunks[$i];
4425: if ($parts{$partIdSoFar}) {
4426: my @otherChunks = @partChunks[$i+1..$#partChunks];
4427: my $responseId = join('_', @otherChunks);
1.379 albertel 4428: if ($self->is_task()) {
4429: push(@{$responseIdHash{$partIdSoFar}},
4430: $partIdSoFar);
4431: } else {
4432: push(@{$responseIdHash{$partIdSoFar}},
4433: $responseId);
4434: }
4435: push(@{$responseTypeHash{$partIdSoFar}},
4436: $responseType);
1.187 bowersj2 4437: }
4438: }
4439: }
4440: }
1.264 albertel 4441: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
1.284 matthew 4442: #
4443: # Reorder the arrays in the %responseIdHash and %responseTypeHash
1.264 albertel 4444: if ($resorder) {
4445: my @resorder=split(/,/,$resorder);
4446: foreach my $part (keys(%responseIdHash)) {
1.286 albertel 4447: my $i=0;
4448: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
1.264 albertel 4449: my @neworder;
4450: foreach my $possibleid (@resorder) {
4451: if (exists($resids{$possibleid})) {
1.286 albertel 4452: push(@neworder,$resids{$possibleid});
1.264 albertel 4453: }
4454: }
1.286 albertel 4455: my @ids;
4456: my @type;
4457: foreach my $element (@neworder) {
4458: push (@ids,$responseIdHash{$part}->[$element]);
4459: push (@type,$responseTypeHash{$part}->[$element]);
4460: }
4461: $responseIdHash{$part}=\@ids;
4462: $responseTypeHash{$part}=\@type;
1.264 albertel 4463: }
4464: }
1.187 bowersj2 4465: $self->{RESPONSE_IDS} = \%responseIdHash;
4466: $self->{RESPONSE_TYPES} = \%responseTypeHash;
1.154 bowersj2 4467: }
4468:
1.51 bowersj2 4469: return;
4470: }
4471:
4472: =pod
4473:
4474: =head2 Resource Status
4475:
1.174 albertel 4476: Problem resources have status information, reflecting their various
4477: dates and completion statuses.
1.51 bowersj2 4478:
1.174 albertel 4479: There are two aspects to the status: the date-related information and
4480: the completion information.
1.51 bowersj2 4481:
1.174 albertel 4482: Idiomatic usage of these two methods would probably look something
4483: like
1.51 bowersj2 4484:
1.394 raeburn 4485: foreach my $part ($resource->parts()) {
4486: my $dateStatus = $resource->getDateStatus($part);
4487: my $completionStatus = $resource->getCompletionStatus($part);
1.51 bowersj2 4488:
1.70 bowersj2 4489: or
4490:
1.394 raeburn 4491: my $status = $resource->status($part);
1.70 bowersj2 4492:
1.51 bowersj2 4493: ... use it here ...
4494: }
4495:
1.174 albertel 4496: Which you use depends on exactly what you are looking for. The
4497: status() function has been optimized for the nav maps display and may
4498: not precisely match what you need elsewhere.
1.101 bowersj2 4499:
1.174 albertel 4500: The symbolic constants shown below can be accessed through the
4501: resource object: C<$res->OPEN>.
1.101 bowersj2 4502:
1.51 bowersj2 4503: =over 4
4504:
1.174 albertel 4505: =item * B<getDateStatus>($part):
4506:
4507: ($part defaults to 0). A convenience function that returns a symbolic
4508: constant telling you about the date status of the part. The possible
4509: return values are:
1.51 bowersj2 4510:
4511: =back
4512:
4513: B<Date Codes>
4514:
4515: =over 4
4516:
1.174 albertel 4517: =item * B<OPEN_LATER>:
4518:
4519: The problem will be opened later.
4520:
4521: =item * B<OPEN>:
4522:
4523: Open and not yet due.
4524:
1.51 bowersj2 4525:
1.174 albertel 4526: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4527:
1.174 albertel 4528: The due date has passed, but the answer date has not yet arrived.
1.59 bowersj2 4529:
1.174 albertel 4530: =item * B<PAST_DUE_NO_ANSWER>:
1.54 bowersj2 4531:
1.174 albertel 4532: The due date has passed and there is no answer opening date set.
1.51 bowersj2 4533:
1.174 albertel 4534: =item * B<ANSWER_OPEN>:
1.51 bowersj2 4535:
1.174 albertel 4536: The answer date is here.
4537:
4538: =item * B<NETWORK_FAILURE>:
4539:
4540: The information is unknown due to network failure.
1.51 bowersj2 4541:
4542: =back
4543:
4544: =cut
4545:
4546: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 4547: sub OPEN_LATER { return 0; }
4548: sub OPEN { return 1; }
4549: sub PAST_DUE_NO_ANSWER { return 2; }
4550: sub PAST_DUE_ANSWER_LATER { return 3; }
4551: sub ANSWER_OPEN { return 4; }
4552: sub NOTHING_SET { return 5; }
4553: sub NETWORK_FAILURE { return 100; }
4554:
4555: # getDateStatus gets the date status for a given problem part.
4556: # Because answer date, due date, and open date are fully independent
4557: # (i.e., it is perfectly possible to *only* have an answer date),
4558: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
4559: # (past, future, none given). This function handles this with a decision
4560: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 4561:
4562: sub getDateStatus {
4563: my $self = shift;
4564: my $part = shift;
4565: $part = "0" if (!defined($part));
1.54 bowersj2 4566:
4567: # Always return network failure if there was one.
1.51 bowersj2 4568: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4569:
4570: my $now = time();
4571:
1.53 bowersj2 4572: my $open = $self->opendate($part);
4573: my $due = $self->duedate($part);
4574: my $answer = $self->answerdate($part);
4575:
4576: if (!$open && !$due && !$answer) {
4577: # no data on the problem at all
4578: # should this be the same as "open later"? think multipart.
4579: return $self->NOTHING_SET;
4580: }
1.59 bowersj2 4581: if (!$open || $now < $open) {return $self->OPEN_LATER}
4582: if (!$due || $now < $due) {return $self->OPEN}
4583: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
4584: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 4585: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 4586: }
4587:
4588: =pod
4589:
4590: B<>
4591:
4592: =over 4
4593:
1.174 albertel 4594: =item * B<getCompletionStatus>($part):
1.51 bowersj2 4595:
1.174 albertel 4596: ($part defaults to 0.) A convenience function that returns a symbolic
4597: constant telling you about the completion status of the part, with the
4598: following possible results:
4599:
4600: =back
1.51 bowersj2 4601:
4602: B<Completion Codes>
4603:
4604: =over 4
4605:
1.174 albertel 4606: =item * B<NOT_ATTEMPTED>:
4607:
4608: Has not been attempted at all.
4609:
4610: =item * B<INCORRECT>:
4611:
4612: Attempted, but wrong by student.
1.51 bowersj2 4613:
1.174 albertel 4614: =item * B<INCORRECT_BY_OVERRIDE>:
1.51 bowersj2 4615:
1.174 albertel 4616: Attempted, but wrong by instructor override.
1.51 bowersj2 4617:
1.174 albertel 4618: =item * B<CORRECT>:
1.51 bowersj2 4619:
1.174 albertel 4620: Correct or correct by instructor.
1.51 bowersj2 4621:
1.174 albertel 4622: =item * B<CORRECT_BY_OVERRIDE>:
1.51 bowersj2 4623:
1.174 albertel 4624: Correct by instructor override.
1.51 bowersj2 4625:
1.174 albertel 4626: =item * B<EXCUSED>:
4627:
4628: Excused. Not yet implemented.
4629:
4630: =item * B<NETWORK_FAILURE>:
4631:
4632: Information not available due to network failure.
4633:
4634: =item * B<ATTEMPTED>:
4635:
4636: Attempted, and not yet graded.
1.69 bowersj2 4637:
1.51 bowersj2 4638: =back
4639:
4640: =cut
4641:
1.53 bowersj2 4642: sub NOT_ATTEMPTED { return 10; }
4643: sub INCORRECT { return 11; }
4644: sub INCORRECT_BY_OVERRIDE { return 12; }
4645: sub CORRECT { return 13; }
4646: sub CORRECT_BY_OVERRIDE { return 14; }
4647: sub EXCUSED { return 15; }
1.69 bowersj2 4648: sub ATTEMPTED { return 16; }
1.51 bowersj2 4649:
4650: sub getCompletionStatus {
4651: my $self = shift;
1.332 albertel 4652: my $part = shift;
1.51 bowersj2 4653: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4654:
1.332 albertel 4655: my $status = $self->queryRestoreHash('solved', $part);
1.51 bowersj2 4656:
1.251 www 4657: # Left as separate if statements in case we ever do more with this
1.51 bowersj2 4658: if ($status eq 'correct_by_student') {return $self->CORRECT;}
1.288 albertel 4659: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
1.332 albertel 4660: if ($status eq 'correct_by_override') {
4661: return $self->CORRECT_BY_OVERRIDE;
4662: }
1.51 bowersj2 4663: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
4664: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
4665: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 4666: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.51 bowersj2 4667: return $self->NOT_ATTEMPTED;
1.108 bowersj2 4668: }
4669:
4670: sub queryRestoreHash {
4671: my $self = shift;
4672: my $hashentry = shift;
4673: my $part = shift;
1.185 bowersj2 4674: $part = "0" if (!defined($part) || $part eq '');
1.108 bowersj2 4675: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
4676:
4677: $self->getReturnHash();
4678:
4679: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
1.51 bowersj2 4680: }
4681:
4682: =pod
4683:
4684: B<Composite Status>
4685:
1.174 albertel 4686: Along with directly returning the date or completion status, the
4687: resource object includes a convenience function B<status>() that will
4688: combine the two status tidbits into one composite status that can
1.191 bowersj2 4689: represent the status of the resource as a whole. This method represents
4690: the concept of the thing we want to display to the user on the nav maps
4691: screen, which is a combination of completion and open status. The precise logic is
1.174 albertel 4692: documented in the comments of the status method. The following results
4693: may be returned, all available as methods on the resource object
1.185 bowersj2 4694: ($res->NETWORK_FAILURE): In addition to the return values that match
4695: the date or completion status, this function can return "ANSWER_SUBMITTED"
4696: if that problemstatus parameter value is set to No, suppressing the
4697: incorrect/correct feedback.
1.51 bowersj2 4698:
4699: =over 4
4700:
1.174 albertel 4701: =item * B<NETWORK_FAILURE>:
4702:
4703: The network has failed and the information is not available.
1.51 bowersj2 4704:
1.174 albertel 4705: =item * B<NOTHING_SET>:
1.53 bowersj2 4706:
1.174 albertel 4707: No dates have been set for this problem (part) at all. (Because only
4708: certain parts of a multi-part problem may be assigned, this can not be
4709: collapsed into "open later", as we do not know a given part will EVER
4710: be opened. For single part, this is the same as "OPEN_LATER".)
1.51 bowersj2 4711:
1.174 albertel 4712: =item * B<CORRECT>:
1.51 bowersj2 4713:
1.174 albertel 4714: For any reason at all, the part is considered correct.
1.54 bowersj2 4715:
1.174 albertel 4716: =item * B<EXCUSED>:
1.51 bowersj2 4717:
1.174 albertel 4718: For any reason at all, the problem is excused.
1.51 bowersj2 4719:
1.174 albertel 4720: =item * B<PAST_DUE_NO_ANSWER>:
1.51 bowersj2 4721:
1.174 albertel 4722: The problem is past due, not considered correct, and no answer date is
4723: set.
1.51 bowersj2 4724:
1.174 albertel 4725: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 4726:
1.174 albertel 4727: The problem is past due, not considered correct, and an answer date in
4728: the future is set.
1.51 bowersj2 4729:
1.174 albertel 4730: =item * B<ANSWER_OPEN>:
4731:
4732: The problem is past due, not correct, and the answer is now available.
4733:
4734: =item * B<OPEN_LATER>:
4735:
4736: The problem is not yet open.
4737:
4738: =item * B<TRIES_LEFT>:
4739:
4740: The problem is open, has been tried, is not correct, but there are
4741: tries left.
4742:
4743: =item * B<INCORRECT>:
4744:
4745: The problem is open, and all tries have been used without getting the
4746: correct answer.
4747:
4748: =item * B<OPEN>:
4749:
4750: The item is open and not yet tried.
4751:
4752: =item * B<ATTEMPTED>:
4753:
4754: The problem has been attempted.
1.69 bowersj2 4755:
1.185 bowersj2 4756: =item * B<ANSWER_SUBMITTED>:
4757:
4758: An answer has been submitted, but the student should not see it.
4759:
1.51 bowersj2 4760: =back
4761:
4762: =cut
4763:
1.185 bowersj2 4764: sub TRIES_LEFT { return 20; }
4765: sub ANSWER_SUBMITTED { return 21; }
1.332 albertel 4766: sub PARTIALLY_CORRECT{ return 22; }
1.51 bowersj2 4767:
1.423.4.1 gci 4768: sub RESERVED_LATER { return 30; }
4769: sub RESERVED { return 31; }
4770: sub RESERVED_LOCATION { return 32; }
4771: sub RESERVABLE { return 33; }
4772: sub RESERVABLE_LATER { return 34; }
4773: sub NOTRESERVABLE { return 35; }
4774: sub NOT_IN_A_SLOT { return 36; }
4775: sub NEEDS_CHECKIN { return 37; }
4776: sub WAITING_FOR_GRADE { return 38; }
4777: sub UNKNOWN { return 39; }
4778:
1.51 bowersj2 4779: sub status {
4780: my $self = shift;
4781: my $part = shift;
4782: if (!defined($part)) { $part = "0"; }
4783: my $completionStatus = $self->getCompletionStatus($part);
4784: my $dateStatus = $self->getDateStatus($part);
4785:
4786: # What we have is a two-dimensional matrix with 4 entries on one
4787: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 4788: # plus network failure and "no date data at all".
1.51 bowersj2 4789:
1.222 bowersj2 4790: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
1.53 bowersj2 4791: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 4792:
1.408 raeburn 4793: my $suppressFeedback = 0;
4794: if (($self->problemstatus($part) eq 'no') ||
4795: ($self->problemstatus($part) eq 'no_feedback_ever')) {
4796: $suppressFeedback = 1;
4797: }
1.236 bowersj2 4798: # If there's an answer date and we're past it, don't
4799: # suppress the feedback; student should know
1.330 albertel 4800: if ($self->duedate($part) && $self->duedate($part) < time() &&
4801: $self->answerdate($part) && $self->answerdate($part) < time()) {
1.236 bowersj2 4802: $suppressFeedback = 0;
4803: }
1.185 bowersj2 4804:
1.51 bowersj2 4805: # There are a few whole rows we can dispose of:
1.53 bowersj2 4806: if ($completionStatus == CORRECT ||
4807: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.332 albertel 4808: if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
4809: my $awarded=$self->awarded($part);
4810: if ($awarded < 1 && $awarded > 0) {
4811: return PARTIALLY_CORRECT;
4812: } elsif ($awarded<1) {
4813: return INCORRECT;
4814: }
4815: return CORRECT;
1.69 bowersj2 4816: }
4817:
1.343 albertel 4818: # If it's WRONG... and not open
4819: if ( ($completionStatus == INCORRECT ||
4820: $completionStatus == INCORRECT_BY_OVERRIDE)
4821: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
4822: return INCORRECT;
4823: }
4824:
1.69 bowersj2 4825: if ($completionStatus == ATTEMPTED) {
4826: return ATTEMPTED;
1.53 bowersj2 4827: }
4828:
4829: # If it's EXCUSED, then return that no matter what
4830: if ($completionStatus == EXCUSED) {
4831: return EXCUSED;
1.51 bowersj2 4832: }
4833:
1.53 bowersj2 4834: if ($dateStatus == NOTHING_SET) {
4835: return NOTHING_SET;
1.51 bowersj2 4836: }
4837:
1.69 bowersj2 4838: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
4839: # by 4 matrix (date statuses).
1.51 bowersj2 4840:
1.54 bowersj2 4841: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 4842: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.272 albertel 4843: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
1.51 bowersj2 4844: }
4845:
1.53 bowersj2 4846: if ($dateStatus == ANSWER_OPEN) {
4847: return ANSWER_OPEN;
1.51 bowersj2 4848: }
4849:
4850: # Now: (incorrect, incorrect_override, not_attempted) x
4851: # (open_later), (open)
4852:
1.53 bowersj2 4853: if ($dateStatus == OPEN_LATER) {
4854: return OPEN_LATER;
1.51 bowersj2 4855: }
4856:
4857: # If it's WRONG...
1.53 bowersj2 4858: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 4859: # and there are TRIES LEFT:
1.79 bowersj2 4860: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.222 bowersj2 4861: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
1.51 bowersj2 4862: }
1.185 bowersj2 4863: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 4864: }
4865:
4866: # Otherwise, it's untried and open
1.53 bowersj2 4867: return OPEN;
1.224 bowersj2 4868: }
4869:
1.423.4.1 gci 4870: sub check_for_slot {
4871: my $self = shift;
4872: my $part = shift;
4873: my ($use_slots,$available,$availablestudent) = $self->slot_control($part);
4874: if (($use_slots ne '') && ($use_slots !~ /^\s*no\s*$/i)) {
4875: my @slots = (split(/:/,$availablestudent),split(/:/,$available));
4876: my $cid=$env{'request.course.id'};
4877: my $cdom=$env{'course.'.$cid.'.domain'};
4878: my $cnum=$env{'course.'.$cid.'.num'};
4879: my $now = time;
4880: if (@slots > 0) {
4881: my %slots=&Apache::lonnet::get('slots',[@slots],$cdom,$cnum);
4882: if (&Apache::lonnet::error(%slots)) {
4883: return (UNKNOWN);
4884: }
4885: my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots);
4886: my ($checkedin,$checkedinslot);
4887: foreach my $slot_name (@sorted_slots) {
4888: next if (!defined($slots{$slot_name}) ||
4889: !ref($slots{$slot_name}));
4890: my $end = $slots{$slot_name}->{'endtime'};
4891: my $start = $slots{$slot_name}->{'starttime'};
4892: my $ip = $slots{$slot_name}->{'ip'};
4893: if ($self->simpleStatus() == OPEN) {
4894: my $startreserve = $slots{$slot_name}->{'startreserve'};
4895: my @proctors;
4896: if ($slots{$slot_name}->{'proctor'} ne '') {
4897: @proctors = split(',',$slots{$slot_name}->{'proctor'});
4898: }
4899: if ($end > $now) {
4900: ($checkedin,$checkedinslot) = $self->checkedin();
4901: if ($startreserve < $now) {
4902: if ($start > $now) {
4903: return (RESERVED_LATER,$start,$slot_name);
4904: } else {
4905: if ($ip ne '') {
4906: if (!&Apache::loncommon::check_ip_acc($ip)) {
4907: return (RESERVED_LOCATION,$ip,$slot_name);
4908: }
4909: }
4910: if (@proctors > 0) {
4911: unless ((grep(/^\Q$checkedin\E/,@proctors)) &&
4912: ($checkedinslot eq $slot_name)) {
4913: return (NEEDS_CHECKIN,undef,$slot_name);
4914: }
4915: }
4916: return (RESERVED,$end,$slot_name);
4917: }
4918: } else {
4919: if ($start > $now) {
4920: return (RESERVABLE,$startreserve,$slot_name);
4921: }
4922: }
4923: }
4924: }
4925: }
4926: my ($is_correct,$got_grade);
4927: if ($self->is_task()) {
4928: my $taskstatus = $self->taskstatus();
4929: $is_correct = (($taskstatus eq 'pass') ||
4930: ($self->solved() =~ /^correct_/));
4931: $got_grade = ($self->solved() =~ /^(?:pass|fail)$/);
4932: } else {
4933: $got_grade = 1;
4934: $is_correct = ($self->solved() =~ /^correct_/);
4935: }
4936: ($checkedin,$checkedinslot) = $self->checkedin();
4937: if ($checkedin) {
4938: if (!$got_grade) {
4939: return (WAITING_FOR_GRADE);
4940: } elsif ($is_correct) {
4941: return (CORRECT);
4942: }
4943: }
4944: return(NOT_IN_A_SLOT);
4945: } else {
4946: if (!$future_slots_checked) {
4947: $future_slots = &get_future_slots($cdom,$cnum,$now);
4948: $future_slots_checked = 1;
4949: }
4950: if ($future_slots) {
4951: return(NOT_IN_A_SLOT);
4952: }
4953: return(NOTRESERVABLE);
4954: }
4955: }
4956: return;
4957: }
4958:
4959: sub get_future_slots {
4960: my ($cdom,$cnum,$now) = @_;
4961: my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
4962: my $future_slots = 0;
4963: foreach my $slot (keys(%slots)) {
4964: if (($slots{$slot}->{'starttime'} > $now) &&
4965: ($slots{$slot}->{'endtime'} > $now)) {
4966: $future_slots ++;
4967: }
4968: }
4969: return $future_slots;
4970: }
4971:
1.224 bowersj2 4972: sub CLOSED { return 23; }
4973: sub ERROR { return 24; }
4974:
4975: =pod
4976:
4977: B<Simple Status>
4978:
4979: Convenience method B<simpleStatus> provides a "simple status" for the resource.
4980: "Simple status" corresponds to "which icon is shown on the
4981: Navmaps". There are six "simple" statuses:
4982:
4983: =over 4
4984:
4985: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
4986:
4987: =item * B<OPEN>: The problem is open and unattempted.
4988:
4989: =item * B<CORRECT>: The problem is correct for any reason.
4990:
4991: =item * B<INCORRECT>: The problem is incorrect and can still be
4992: completed successfully.
4993:
4994: =item * B<ATTEMPTED>: The problem has been attempted, but the student
4995: does not know if they are correct. (The ellipsis icon.)
4996:
4997: =item * B<ERROR>: There is an error retrieving information about this
4998: problem.
4999:
5000: =back
5001:
5002: =cut
5003:
5004: # This hash maps the composite status to this simple status, and
5005: # can be used directly, if you like
5006: my %compositeToSimple =
5007: (
5008: NETWORK_FAILURE() => ERROR,
5009: NOTHING_SET() => CLOSED,
5010: CORRECT() => CORRECT,
1.332 albertel 5011: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
1.224 bowersj2 5012: EXCUSED() => CORRECT,
5013: PAST_DUE_NO_ANSWER() => INCORRECT,
5014: PAST_DUE_ANSWER_LATER() => INCORRECT,
5015: ANSWER_OPEN() => INCORRECT,
5016: OPEN_LATER() => CLOSED,
5017: TRIES_LEFT() => OPEN,
5018: INCORRECT() => INCORRECT,
5019: OPEN() => OPEN,
5020: ATTEMPTED() => ATTEMPTED,
5021: ANSWER_SUBMITTED() => ATTEMPTED
5022: );
5023:
5024: sub simpleStatus {
5025: my $self = shift;
5026: my $part = shift;
5027: my $status = $self->status($part);
5028: return $compositeToSimple{$status};
1.225 bowersj2 5029: }
5030:
5031: =pod
5032:
5033: B<simpleStatusCount> will return an array reference containing, in
5034: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
5035: and ERROR parts the given problem has.
5036:
5037: =cut
5038:
5039: # This maps the status to the slot we want to increment
5040: my %statusToSlotMap =
5041: (
5042: OPEN() => 0,
5043: CLOSED() => 1,
5044: CORRECT() => 2,
5045: INCORRECT() => 3,
5046: ATTEMPTED() => 4,
5047: ERROR() => 5
5048: );
5049:
5050: sub statusToSlot { return $statusToSlotMap{shift()}; }
5051:
5052: sub simpleStatusCount {
5053: my $self = shift;
5054:
5055: my @counts = (0, 0, 0, 0, 0, 0, 0);
5056: foreach my $part (@{$self->parts()}) {
5057: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
5058: }
5059:
5060: return \@counts;
1.191 bowersj2 5061: }
5062:
5063: =pod
5064:
5065: B<Completable>
5066:
5067: The completable method represents the concept of I<whether the student can
5068: currently do the problem>. If the student can do the problem, which means
5069: that it is open, there are tries left, and if the problem is manually graded
5070: or the grade is suppressed via problemstatus, the student has not tried it
5071: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
5072: either the student has tried it and there is no feedback, or that for
5073: some reason it is no longer completable (not open yet, successfully completed,
5074: out of tries, etc.). As an example, this is used as the filter for the
5075: "Uncompleted Homework" option for the nav maps.
5076:
5077: If this does not quite meet your needs, do not fiddle with it (unless you are
5078: fixing it to better match the student's conception of "completable" because
5079: it's broken somehow)... make a new method.
5080:
5081: =cut
5082:
5083: sub completable {
5084: my $self = shift;
5085: if (!$self->is_problem()) { return 0; }
5086: my $partCount = $self->countParts();
5087:
5088: foreach my $part (@{$self->parts()}) {
5089: if ($part eq '0' && $partCount != 1) { next; }
5090: my $status = $self->status($part);
5091: # "If any of the parts are open, or have tries left (implies open),
5092: # and it is not "attempted" (manually graded problem), it is
5093: # not "complete"
1.216 bowersj2 5094: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
5095: $status == ANSWER_SUBMITTED() ) {
5096: # did this part already, as well as we can
5097: next;
5098: }
5099: if ($status == OPEN() || $status == TRIES_LEFT()) {
5100: return 1;
5101: }
1.191 bowersj2 5102: }
5103:
5104: # If all the parts were complete, so was this problem.
1.216 bowersj2 5105: return 0;
1.51 bowersj2 5106: }
5107:
5108: =pod
5109:
5110: =head2 Resource/Nav Map Navigation
5111:
5112: =over 4
5113:
1.174 albertel 5114: =item * B<getNext>():
5115:
5116: Retreive an array of the possible next resources after this
5117: one. Always returns an array, even in the one- or zero-element case.
5118:
5119: =item * B<getPrevious>():
1.85 bowersj2 5120:
1.174 albertel 5121: Retreive an array of the possible previous resources from this
5122: one. Always returns an array, even in the one- or zero-element case.
1.51 bowersj2 5123:
5124: =cut
5125:
5126: sub getNext {
5127: my $self = shift;
5128: my @branches;
5129: my $to = $self->to();
1.85 bowersj2 5130: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 5131: my $choice = $self->{NAV_MAP}->getById($branch);
1.342 albertel 5132: #if (!$choice->condition()) { next; }
1.51 bowersj2 5133: my $next = $choice->goesto();
5134: $next = $self->{NAV_MAP}->getById($next);
5135:
1.131 bowersj2 5136: push @branches, $next;
1.85 bowersj2 5137: }
5138: return \@branches;
5139: }
5140:
5141: sub getPrevious {
5142: my $self = shift;
5143: my @branches;
5144: my $from = $self->from();
5145: foreach my $branch ( split /,/, $from) {
5146: my $choice = $self->{NAV_MAP}->getById($branch);
5147: my $prev = $choice->comesfrom();
5148: $prev = $self->{NAV_MAP}->getById($prev);
5149:
1.131 bowersj2 5150: push @branches, $prev;
1.51 bowersj2 5151: }
5152: return \@branches;
1.131 bowersj2 5153: }
5154:
5155: sub browsePriv {
5156: my $self = shift;
5157: if (defined($self->{BROWSE_PRIV})) {
5158: return $self->{BROWSE_PRIV};
5159: }
5160:
1.311 albertel 5161: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
5162: $self->symb());
1.51 bowersj2 5163: }
5164:
5165: =pod
1.2 www 5166:
1.51 bowersj2 5167: =back
1.2 www 5168:
1.51 bowersj2 5169: =cut
1.2 www 5170:
1.51 bowersj2 5171: 1;
1.2 www 5172:
1.51 bowersj2 5173: __END__
1.2 www 5174:
5175:
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