1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
3: #
4: # $Id: lonnavmaps.pm,v 1.509.2.17 2024/07/03 03:07:58 raeburn Exp $
5:
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: ###
30:
31: =pod
32:
33: =head1 NAME
34:
35: Apache::lonnavmaps - Subroutines to handle and render the navigation
36:
37: =head1 SYNOPSIS
38:
39: Handles navigational maps.
40:
41: The main handler generates the navigational listing for the course,
42: the other objects export this information in a usable fashion for
43: other modules.
44:
45:
46: This is part of the LearningOnline Network with CAPA project
47: described at http://www.lon-capa.org.
48:
49:
50: =head1 OVERVIEW
51:
52: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
53: course structure and caches it in what is often referred to as the
54: "big hash" X<big hash>. You can see it if you are logged into
55: LON-CAPA, in a course, by going to /adm/test. (You may need to
56: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
57: content of the hash will be under the heading "Big Hash".
58:
59: Big Hash contains, among other things, how resources are related
60: to each other (next/previous), what resources are maps, which
61: resources are being chosen to not show to the student (for random
62: selection), and a lot of other things that can take a lot of time
63: to compute due to the amount of data that needs to be collected and
64: processed.
65:
66: Apache::lonnavmaps provides an object model for manipulating this
67: information in a higher-level fashion than directly manipulating
68: the hash. It also provides access to several auxilary functions
69: that aren't necessarily stored in the Big Hash, but are a per-
70: resource sort of value, like whether there is any feedback on
71: a given resource.
72:
73: Apache::lonnavmaps also abstracts away branching, and someday,
74: conditions, for the times where you don't really care about those
75: things.
76:
77: Apache::lonnavmaps also provides fairly powerful routines for
78: rendering navmaps, and last but not least, provides the navmaps
79: view for when the user clicks the NAV button.
80:
81: B<Note>: Apache::lonnavmaps I<only> works for the "currently
82: logged in user"; if you want things like "due dates for another
83: student" lonnavmaps can not directly retrieve information like
84: that. You need the EXT function. This module can still help,
85: because many things, such as the course structure, are constant
86: between users, and Apache::lonnavmaps can help by providing
87: symbs for the EXT call.
88:
89: The rest of this file will cover the provided rendering routines,
90: which can often be used without fiddling with the navmap object at
91: all, then documents the Apache::lonnavmaps::navmap object, which
92: is the key to accessing the Big Hash information, covers the use
93: of the Iterator (which provides the logic for traversing the
94: somewhat-complicated Big Hash data structure), documents the
95: Apache::lonnavmaps::Resource objects that are returned by
96:
97: =head1 Subroutine: render
98:
99: The navmap renderer package provides a sophisticated rendering of the
100: standard navigation maps interface into HTML. The provided nav map
101: handler is actually just a glorified call to this.
102:
103: Because of the large number of parameters this function accepts,
104: instead of passing it arguments as is normal, pass it in an anonymous
105: hash with the desired options.
106:
107: The package provides a function called 'render', called as
108: Apache::lonnavmaps::render({}).
109:
110: =head2 Overview of Columns
111:
112: The renderer will build an HTML table for the navmap and return
113: it. The table consists of several columns, and a row for each
114: resource (or possibly each part). You tell the renderer how many
115: columns to create and what to place in each column, optionally using
116: one or more of the prepared columns, and the renderer will assemble
117: the table.
118:
119: Any additional generally useful column types should be placed in the
120: renderer code here, so anybody can use it anywhere else. Any code
121: specific to the current application (such as the addition of <input>
122: elements in a column) should be placed in the code of the thing using
123: the renderer.
124:
125: At the core of the renderer is the array reference COLS (see Example
126: section below for how to pass this correctly). The COLS array will
127: consist of entries of one of two types of things: Either an integer
128: representing one of the pre-packaged column types, or a sub reference
129: that takes a resource reference, a part number, and a reference to the
130: argument hash passed to the renderer, and returns a string that will
131: be inserted into the HTML representation as it.
132:
133: All other parameters are ways of either changing how the columns
134: are printing, or which rows are shown.
135:
136: The pre-packaged column names are refered to by constants in the
137: Apache::lonnavmaps namespace. The following currently exist:
138:
139: =over 4
140:
141: =item * B<Apache::lonnavmaps::resource>:
142:
143: The general info about the resource: Link, icon for the type, etc. The
144: first column in the standard nav map display. This column provides the
145: indentation effect seen in the B<NAV> screen. This column also accepts
146: the following parameters in the renderer hash:
147:
148: =over 4
149:
150: =item * B<resource_nolink>: default false
151:
152: If true, the resource will not be linked. By default, all non-folder
153: resources are linked.
154:
155: =item * B<resource_part_count>: default true
156:
157: If true, the resource will show a part count B<if> the full
158: part list is not displayed. (See "condense_parts" later.) If false,
159: the resource will never show a part count.
160:
161: =item * B<resource_no_folder_link>:
162:
163: If true, the resource's folder will not be clickable to open or close
164: it. Default is false. True implies printCloseAll is false, since you
165: can't close or open folders when this is on anyhow.
166:
167: =item * B<map_no_edit_link>:
168:
169: If true, the title of the folder or page will not be followed by an
170: icon/link to direct editing of a folder or composite page, originally
171: added via the Course Editor.
172:
173: =back
174:
175: =item * B<Apache::lonnavmaps::communication_status>:
176:
177: Whether there is discussion on the resource, email for the user, or
178: (lumped in here) perl errors in the execution of the problem. This is
179: the second column in the main nav map.
180:
181: =item * B<Apache::lonnavmaps::quick_status>:
182:
183: An icon for the status of a problem, with five possible states:
184: Correct, incorrect, open, awaiting grading (for a problem where the
185: computer's grade is suppressed, or the computer can't grade, like
186: essay problem), or none (not open yet, not a problem). The
187: third column of the standard navmap.
188:
189: =item * B<Apache::lonnavmaps::long_status>:
190:
191: A text readout of the details of the current status of the problem,
192: such as "Due in 22 hours". The fourth column of the standard navmap.
193:
194: =item * B<Apache::lonnavmaps::part_status_summary>:
195:
196: A text readout summarizing the status of the problem. If it is a
197: single part problem, will display "Correct", "Incorrect",
198: "Not yet open", "Open", "Attempted", or "Error". If there are
199: multiple parts, this will output a string that in HTML will show a
200: status of how many parts are in each status, in color coding, trying
201: to match the colors of the icons within reason.
202:
203: Note this only makes sense if you are I<not> showing parts. If
204: C<showParts> is true (see below), this column will not output
205: anything.
206:
207: =back
208:
209: If you add any others please be sure to document them here.
210:
211: An example of a column renderer that will show the ID number of a
212: resource, along with the part name if any:
213:
214: sub {
215: my ($resource, $part, $params) = @_;
216: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
217: return '<td>' . $resource->{ID} . '</td>';
218: }
219:
220: Note these functions are responsible for the TD tags, which allow them
221: to override vertical and horizontal alignment, etc.
222:
223: =head2 Parameters
224:
225: Minimally, you should be
226: able to get away with just using 'cols' (to specify the columns
227: shown), 'url' (necessary for the folders to link to the current screen
228: correctly), and possibly 'queryString' if your app calls for it. In
229: that case, maintaining the state of the folders will be done
230: automatically.
231:
232: =over 4
233:
234: =item * B<iterator>: default: constructs one from %env
235:
236: A reference to a fresh ::iterator to use from the navmaps. The
237: rendering will reflect the options passed to the iterator, so you can
238: use that to just render a certain part of the course, if you like. If
239: one is not passed, the renderer will attempt to construct one from
240: env{'form.filter'} and env{'form.condition'} information, plus the
241: 'iterator_map' parameter if any.
242:
243: =item * B<iterator_map>: default: not used
244:
245: If you are letting the renderer do the iterator handling, you can
246: instruct the renderer to render only a particular map by passing it
247: the source of the map you want to process, like
248: '/res/103/jerf/navmap.course.sequence'.
249:
250: =item * B<include_top_level_map>: default: false
251:
252: If you need to include the top level map (meaning the course) in the
253: rendered output set this to true
254:
255: =item * B<navmap>: default: constructs one from %env
256:
257: A reference to a navmap, used only if an iterator is not passed in. If
258: this is necessary to make an iterator but it is not passed in, a new
259: one will be constructed based on env info. This is useful to do basic
260: error checking before passing it off to render.
261:
262: =item * B<r>: default: must be passed in
263:
264: The standard Apache response object. This must be passed to the
265: renderer or the course hash will be locked.
266:
267: =item * B<cols>: default: empty (useless)
268:
269: An array reference
270:
271: =item * B<showParts>:default true
272:
273: A flag. If true, a line for the resource itself, and a line
274: for each part will be displayed. If not, only one line for each
275: resource will be displayed.
276:
277: =item * B<condenseParts>: default true
278:
279: A flag. If true, if all parts of the problem have the same
280: status and that status is Nothing Set, Correct, or Network Failure,
281: then only one line will be displayed for that resource anyhow. If no,
282: all parts will always be displayed. If showParts is 0, this is
283: ignored.
284:
285: =item * B<jumpCount>: default: determined from %env
286:
287: A string identifying the URL to place the anchor 'curloc' at.
288: It is the responsibility of the renderer user to
289: ensure that the #curloc is in the URL. By default, determined through
290: the use of the env{} 'jump' information, and should normally "just
291: work" correctly.
292:
293: =item * B<here>: default: empty string
294:
295: A Symb identifying where to place the 'here' marker. The empty
296: string means no marker.
297:
298: =item * B<indentString>: default: 25 pixel whitespace image
299:
300: A string identifying the indentation string to use.
301:
302: =item * B<queryString>: default: empty
303:
304: A string which will be prepended to the query string used when the
305: folders are opened or closed. You can use this to pass
306: application-specific values.
307:
308: =item * B<url>: default: none
309:
310: The url the folders will link to, which should be the current
311: page. Required if the resource info column is shown, and you
312: are allowing the user to open and close folders.
313:
314: =item * B<currentJumpIndex>: default: no jumping
315:
316: Describes the currently-open row number to cause the browser to jump
317: to, because the user just opened that folder. By default, pulled from
318: the Jump information in the env{'form.*'}.
319:
320: =item * B<printKey>: default: false
321:
322: If true, print the key that appears on the top of the standard
323: navmaps.
324:
325: =item * B<printCloseAll>: default: true
326:
327: If true, print the "Close all folders" or "open all folders"
328: links.
329:
330: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
331:
332: A function that takes the resource object as its only parameter and
333: returns a true or false value. If true, the resource is displayed. If
334: false, it is simply skipped in the display.
335:
336: =item * B<suppressEmptySequences>: default: false
337:
338: If you're using a filter function, and displaying sequences to orient
339: the user, then frequently some sequences will be empty. Setting this to
340: true will cause those sequences not to display, so as not to confuse the
341: user into thinking that if the sequence is there there should be things
342: under it; for example, see the "Show Uncompleted Homework" view on the
343: B<NAV> screen.
344:
345: =item * B<suppressNavmap>: default: false
346:
347: If true, will not display Navigate Content resources.
348:
349: =back
350:
351: =head2 Additional Info
352:
353: In addition to the parameters you can pass to the renderer, which will
354: be passed through unchange to the column renderers, the renderer will
355: generate the following information which your renderer may find
356: useful:
357:
358: =over 4
359:
360: =item * B<counter>:
361:
362: Contains the number of rows printed. Useful after calling the render
363: function, as you can detect whether anything was printed at all.
364:
365: =item * B<isNewBranch>:
366:
367: Useful for renderers: If this resource is currently the first resource
368: of a new branch, this will be true. The Resource column (leftmost in the
369: navmaps screen) uses this to display the "new branch" icon
370:
371: =back
372:
373: =cut
374:
375:
376: =head1 SUBROUTINES
377:
378: =over
379:
380: =item update()
381:
382: =item addToFilter()
383:
384: Convenience functions: Returns a string that adds or subtracts
385: the second argument from the first hash, appropriate for the
386: query string that determines which folders to recurse on
387:
388: =item removeFromFilter()
389:
390: =item getLinkForResource()
391:
392: Convenience function: Given a stack returned from getStack on the iterator,
393: return the correct src() value.
394:
395: =item getDescription()
396:
397: Convenience function: This separates the logic of how to create
398: the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
399: etc.) into a separate function. It takes a resource object as the
400: first parameter, and the part number of the resource as the second.
401: It's basically a big switch statement on the status of the resource.
402:
403: =item dueInLessThan24Hours()
404:
405: Convenience function, so others can use it: Is the problem due in less than 24 hours, and still can be done?
406:
407: =item lastTry()
408:
409: Convenience function, so others can use it: Is there only one try remaining for the
410: part, with more than one try to begin with, not due yet and still can be done?
411:
412: =item advancedUser()
413:
414: This puts a human-readable name on the env variable.
415:
416: =item timeToHumanString()
417:
418: timeToHumanString takes a time number and converts it to a
419: human-readable representation, meant to be used in the following
420: manner:
421:
422: =over 4
423:
424: =item * print "Due $timestring"
425:
426: =item * print "Open $timestring"
427:
428: =item * print "Answer available $timestring"
429:
430: =back
431:
432: Very, very, very, VERY English-only... goodness help a localizer on
433: this func...
434:
435: =item resource()
436:
437: returns 0
438:
439: =item communication_status()
440:
441: returns 1
442:
443: =item quick_status()
444:
445: returns 2
446:
447: =item long_status()
448:
449: returns 3
450:
451: =item part_status_summary()
452:
453: returns 4
454:
455: =item render_resource()
456:
457: =item render_communication_status()
458:
459: =item render_quick_status()
460:
461: =item render_long_status()
462:
463: =item render_parts_summary_status()
464:
465: =item setDefault()
466:
467: =item cmp_title()
468:
469: =item render()
470:
471: =item add_linkitem()
472:
473: =item show_linkitems_toolbar()
474:
475: =back
476:
477: =cut
478:
479: package Apache::lonnavmaps;
480:
481: use strict;
482: use GDBM_File;
483: use Apache::loncommon();
484: use Apache::lonenc();
485: use Apache::lonlocal;
486: use Apache::lonnet;
487: use Apache::lonmap;
488:
489: use POSIX qw (ceil floor strftime);
490: use Time::HiRes qw( gettimeofday tv_interval );
491: use LONCAPA;
492: use DateTime();
493: use HTML::Entities;
494:
495: # For debugging
496:
497: #use Data::Dumper;
498:
499:
500: # symbolic constants
501: sub SYMB { return 1; }
502: sub URL { return 2; }
503: sub NOTHING { return 3; }
504:
505: # Some data
506:
507: my $resObj = "Apache::lonnavmaps::resource";
508:
509: # Keep these mappings in sync with lonquickgrades, which usesthe colors
510: # instead of the icons.
511: my %statusIconMap =
512: (
513: $resObj->CLOSED => '',
514: $resObj->OPEN => 'navmap.open.gif',
515: $resObj->CORRECT => 'navmap.correct.gif',
516: $resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
517: $resObj->INCORRECT => 'navmap.wrong.gif',
518: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
519: $resObj->ERROR => ''
520: );
521:
522: my %iconAltTags = #texthash does not work here
523: ( 'navmap.correct.gif' => 'Correct',
524: 'navmap.wrong.gif' => 'Incorrect',
525: 'navmap.open.gif' => 'Is Open',
526: 'navmap.partial.gif' => 'Partially Correct',
527: 'navmap.ellipsis.gif' => 'Attempted',
528: );
529:
530: # Defines a status->color mapping, null string means don't color
531: my %colormap =
532: ( $resObj->NETWORK_FAILURE => '',
533: $resObj->CORRECT => '',
534: $resObj->EXCUSED => '#3333FF',
535: $resObj->PAST_DUE_ANSWER_LATER => '',
536: $resObj->PAST_DUE_NO_ANSWER => '',
537: $resObj->PAST_DUE_ATMPT_ANS => '',
538: $resObj->PAST_DUE_ATMPT_NOANS => '',
539: $resObj->PAST_DUE_NO_ATMT_ANS => '',
540: $resObj->PAST_DUE_NO_ATMT_NOANS => '',
541: $resObj->ANSWER_OPEN => '#006600',
542: $resObj->OPEN_LATER => '',
543: $resObj->TRIES_LEFT => '',
544: $resObj->INCORRECT => '',
545: $resObj->OPEN => '',
546: $resObj->NOTHING_SET => '',
547: $resObj->ATTEMPTED => '',
548: $resObj->CREDIT_ATTEMPTED => '',
549: $resObj->ANSWER_SUBMITTED => '',
550: $resObj->PARTIALLY_CORRECT => '#006600'
551: );
552: # And a special case in the nav map; what to do when the assignment
553: # is not yet done and due in less than 24 hours
554: my $hurryUpColor = "#FF0000";
555:
556: sub addToFilter {
557: my $hashIn = shift;
558: my $addition = shift;
559: my %hash = %$hashIn;
560: $hash{$addition} = 1;
561:
562: return join (",", keys(%hash));
563: }
564:
565: sub removeFromFilter {
566: my $hashIn = shift;
567: my $subtraction = shift;
568: my %hash = %$hashIn;
569:
570: delete $hash{$subtraction};
571: return join(",", keys(%hash));
572: }
573:
574: sub getLinkForResource {
575: my $stack = shift;
576: my $res;
577:
578: # Check to see if there are any pages in the stack
579: foreach $res (@$stack) {
580: if (defined($res)) {
581: my $anchor;
582: if ($res->is_page()) {
583: foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
584: if ($anchor->encrypted() && !&advancedUser()) {
585: $anchor='LC_'.$anchor->id();
586: } else {
587: $anchor=&escape($anchor->shown_symb());
588: }
589: return ($res->link(),$res->shown_symb(),$anchor);
590: }
591: # in case folder was skipped over as "only sequence"
592: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
593: if ($map=~/\.page$/) {
594: my $url=&Apache::lonnet::clutter($map);
595: $anchor=&escape($res->shown_symb());
596: return ($url,$res->shown_symb(),$anchor);
597: }
598: }
599: }
600:
601: # Failing that, return the src of the last resource that is defined
602: # (when we first recurse on a map, it puts an undefined resource
603: # on the bottom because $self->{HERE} isn't defined yet, and we
604: # want the src for the map anyhow)
605: foreach my $item (@$stack) {
606: if (defined($item)) { $res = $item; }
607: }
608:
609: if ($res) {
610: return ($res->link(),$res->shown_symb());
611: }
612: return;
613: }
614:
615:
616:
617: sub getDescription {
618: my $res = shift;
619: my $part = shift;
620: my $status = $res->status($part);
621:
622: my $open = $res->opendate($part);
623: my $due = $res->duedate($part);
624: my $answer = $res->answerdate($part);
625:
626: if ($status == $res->NETWORK_FAILURE) {
627: return &mt("Having technical difficulties; please check status later");
628: }
629: if ($status == $res->NOTHING_SET) {
630: return &Apache::lonhtmlcommon::direct_parm_link(&mt('Not currently assigned'),$res->symb(),'opendate',$part);
631: }
632: if ($status == $res->OPEN_LATER) {
633: return &mt("Open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($open,'start'),$res->symb(),'opendate',$part));
634: }
635: my $slotinfo;
636: if ($res->simpleStatus($part) == $res->OPEN) {
637: unless (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
638: my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);
639: my $slotmsg;
640: if ($slot_status == $res->UNKNOWN) {
641: $slotmsg = &mt('Reservation status unknown');
642: } elsif ($slot_status == $res->RESERVED) {
643: $slotmsg = &mt('Reserved - ends [_1]',
644: timeToHumanString($slot_time,'end'));
645: } elsif ($slot_status == $res->RESERVED_LOCATION) {
646: $slotmsg = &mt('Reserved - specific location(s) - ends [_1]',
647: timeToHumanString($slot_time,'end'));
648: } elsif ($slot_status == $res->RESERVED_LATER) {
649: $slotmsg = &mt('Reserved - next open [_1]',
650: timeToHumanString($slot_time,'start'));
651: } elsif ($slot_status == $res->RESERVABLE) {
652: $slotmsg = &mt('Reservable, reservations close [_1]',
653: timeToHumanString($slot_time,'end'));
654: } elsif ($slot_status == $res->NEEDS_CHECKIN) {
655: $slotmsg = &mt('Reserved, check-in needed - ends [_1]',
656: timeToHumanString($slot_time,'end'));
657: } elsif ($slot_status == $res->RESERVABLE_LATER) {
658: $slotmsg = &mt('Reservable, reservations open [_1]',
659: timeToHumanString($slot_time,'start'));
660: } elsif ($slot_status == $res->NOT_IN_A_SLOT) {
661: $slotmsg = &mt('Reserve a time/place to work');
662: } elsif ($slot_status == $res->NOTRESERVABLE) {
663: $slotmsg = &mt('Reservation not available');
664: } elsif ($slot_status == $res->WAITING_FOR_GRADE) {
665: $slotmsg = &mt('Submission in grading queue');
666: }
667: if ($slotmsg) {
668: if ($res->is_task() || !$due) {
669: return $slotmsg;
670: }
671: $slotinfo = (' ' x 2).'('.$slotmsg.')';
672: }
673: }
674: }
675: if ($status == $res->OPEN) {
676: if ($due) {
677: if ($res->is_practice()) {
678: return &mt("Closes [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'duedate',$part)).$slotinfo;
679: } else {
680: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)).$slotinfo;
681: }
682: } else {
683: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Open, no due date"),$res->symb(),'duedate',$part).$slotinfo;
684: }
685: }
686: if (($status == $res->PAST_DUE_ANSWER_LATER) || ($status == $res->PAST_DUE_ATMPT_ANS) || ($status == $res->PAST_DUE_NO_ATMT_ANS)) {
687: return &mt("Answer open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($answer,'start'),$res->symb(),'answerdate',$part));
688: }
689: if (($status == $res->PAST_DUE_NO_ANSWER) || ($status == $res->PAST_DUE_ATMPT_NOANS) || ($status == $res->PAST_DUE_NO_ATMT_NOANS)) {
690: if ($res->is_practice()) {
691: return &mt("Closed [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'answerdate,duedate',$part));
692: } else {
693: return &mt("Was due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'answerdate,duedate',$part));
694: }
695: }
696: if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
697: && $res->handgrade($part) ne 'yes') {
698: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Answer available"),$res->symb(),'answerdate,duedate',$part);
699: }
700: if ($status == $res->EXCUSED) {
701: return &mt("Excused by instructor");
702: }
703: if ($status == $res->ATTEMPTED) {
704: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
705: return &mt("Survey submission recorded");
706: } else {
707: return &mt("Answer submitted, not yet graded");
708: }
709: }
710: if ($status == $res->CREDIT_ATTEMPTED) {
711: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
712: return &mt("Credit for survey submission");
713: }
714: }
715: if ($status == $res->TRIES_LEFT) {
716: my $tries = $res->tries($part);
717: my $maxtries = $res->maxtries($part);
718: my $triesString = "";
719: if ($tries && $maxtries) {
720: $triesString = '<span class="LC_fontsize_medium"><i>('.&mt('[_1] of [quant,_2,try,tries] used',$tries,$maxtries).')</i></span>';
721: if ($maxtries > 1 && $maxtries - $tries == 1) {
722: $triesString = "<b>$triesString</b>";
723: }
724: }
725: if ($due) {
726: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)) .
727: " $triesString";
728: } else {
729: return &Apache::lonhtmlcommon::direct_parm_link(&mt("No due date"),$res->symb(),'duedate',$part)." $triesString";
730: }
731: }
732: if ($status == $res->ANSWER_SUBMITTED) {
733: return &mt('Answer submitted');
734: }
735: }
736:
737:
738: sub dueInLessThan24Hours {
739: my $res = shift;
740: my $part = shift;
741: my $status = $res->status($part);
742:
743: return ($status == $res->OPEN() ||
744: $status == $res->TRIES_LEFT()) &&
745: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
746: $res->duedate($part) > time();
747: }
748:
749:
750: sub lastTry {
751: my $res = shift;
752: my $part = shift;
753:
754: my $tries = $res->tries($part);
755: my $maxtries = $res->maxtries($part);
756: return $tries && $maxtries && $maxtries > 1 &&
757: $maxtries - $tries == 1 && $res->duedate($part) &&
758: $res->duedate($part) > time();
759: }
760:
761:
762: sub advancedUser {
763: return $env{'request.role.adv'};
764: }
765:
766: sub timeToHumanString {
767: my ($time,$type,$format) = @_;
768:
769: # zero, '0' and blank are bad times
770: if (!$time) {
771: return &mt('never');
772: }
773: unless (&Apache::lonlocal::current_language()=~/^en/) {
774: return &Apache::lonlocal::locallocaltime($time);
775: }
776: my $now = time();
777:
778: # Positive = future
779: my $delta = $time - $now;
780:
781: my $minute = 60;
782: my $hour = 60 * $minute;
783: my $day = 24 * $hour;
784: my $week = 7 * $day;
785: my $inPast = 0;
786:
787: # Logic in comments:
788: # Is it now? (extremely unlikely)
789: if ( $delta == 0 ) {
790: return "this instant";
791: }
792:
793: if ($delta < 0) {
794: $inPast = 1;
795: $delta = -$delta;
796: }
797:
798: if ( $delta > 0 ) {
799:
800: my $tense = $inPast ? " ago" : "";
801: my $prefix = $inPast ? "" : "in ";
802:
803: # Less than a minute
804: if ( $delta < $minute ) {
805: if ($delta == 1) { return "${prefix}1 second$tense"; }
806: return "$prefix$delta seconds$tense";
807: }
808:
809: # Less than an hour
810: if ( $delta < $hour ) {
811: # If so, use minutes; or minutes, seconds (if format requires)
812: my $minutes = floor($delta / 60);
813: if (($format ne '') && ($format =~ /\%(T|S)/)) {
814: my $display;
815: if ($minutes == 1) {
816: $display = "${prefix}1 minute";
817: } else {
818: $display = "$prefix$minutes minutes";
819: }
820: my $seconds = $delta % $minute;
821: if ($seconds == 0) {
822: $display .= $tense;
823: } elsif ($seconds == 1) {
824: $display .= ", 1 second$tense";
825: } else {
826: $display .= ", $seconds seconds$tense";
827: }
828: return $display;
829: }
830: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
831: return "$prefix$minutes minutes$tense";
832: }
833:
834: # Is it less than 24 hours away? If so,
835: # display hours + minutes, (and + seconds, if format specified it)
836: if ( $delta < $hour * 24) {
837: my $hours = floor($delta / $hour);
838: my $minutes = floor(($delta % $hour) / $minute);
839: my $hourString = "$hours hours";
840: my $minuteString = ", $minutes minutes";
841: if ($hours == 1) {
842: $hourString = "1 hour";
843: }
844: if ($minutes == 1) {
845: $minuteString = ", 1 minute";
846: }
847: if ($minutes == 0) {
848: $minuteString = "";
849: }
850: if (($format ne '') && ($format =~ /\%(T|S)/)) {
851: my $display = "$prefix$hourString$minuteString";
852: my $seconds = $delta-(($hours * $hour)+($minutes * $minute));
853: if ($seconds == 0) {
854: $display .= $tense;
855: } elsif ($seconds == 1) {
856: $display .= ", 1 second$tense";
857: } else {
858: $display .= ", $seconds seconds$tense";
859: }
860: return $display;
861: }
862: return "$prefix$hourString$minuteString$tense";
863: }
864:
865: # Date/time is more than 24 hours away
866:
867: my $dt = DateTime->from_epoch(epoch => $time)
868: ->set_time_zone(&Apache::lonlocal::gettimezone());
869:
870: # If there's a caller supplied format, use it, unless it only displays
871: # H:M:S or H:M.
872:
873: if (($format ne '') && ($format ne '%T') && ($format ne '%R')) {
874: my $timeStr = $dt->strftime($format);
875: return $timeStr.' ('.$dt->time_zone_short_name().')';
876: }
877:
878: # Less than 5 days away, display day of the week and
879: # HH:MM
880:
881: if ( $delta < $day * 5 ) {
882: my $timeStr = $dt->strftime("%A, %b %e at %I:%M %P (%Z)");
883: $timeStr =~ s/12:00 am/00:00/;
884: $timeStr =~ s/12:00 pm/noon/;
885: return ($inPast ? "last " : "this ") .
886: $timeStr;
887: }
888:
889: my $conjunction='on';
890: if ($type eq 'start') {
891: $conjunction='at';
892: } elsif ($type eq 'end') {
893: $conjunction='by';
894: }
895: # Is it this year?
896: my $dt_now = DateTime->from_epoch(epoch => $now)
897: ->set_time_zone(&Apache::lonlocal::gettimezone());
898: if ( $dt->year() == $dt_now->year()) {
899: # Return on Month Day, HH:MM meridian
900: my $timeStr = $dt->strftime("$conjunction %A, %b %e at %I:%M %P (%Z)");
901: $timeStr =~ s/12:00 am/00:00/;
902: $timeStr =~ s/12:00 pm/noon/;
903: return $timeStr;
904: }
905:
906: # Not this year, so show the year
907: my $timeStr =
908: $dt->strftime("$conjunction %A, %b %e %Y at %I:%M %P (%Z)");
909: $timeStr =~ s/12:00 am/00:00/;
910: $timeStr =~ s/12:00 pm/noon/;
911: return $timeStr;
912: }
913: }
914:
915:
916: sub resource { return 0; }
917: sub communication_status { return 1; }
918: sub quick_status { return 2; }
919: sub long_status { return 3; }
920: sub part_status_summary { return 4; }
921:
922: sub render_resource {
923: my ($resource, $part, $params) = @_;
924:
925: my $editmapLink;
926: my $nonLinkedText = ''; # stuff after resource title not in link
927:
928: my $link = $params->{"resourceLink"};
929: if ($resource->ext()) {
930: $link =~ s/\#.+(\?)/$1/g;
931: }
932:
933: # The URL part is not escaped at this point, but the symb is...
934:
935: my $src = $resource->src();
936: my $it = $params->{"iterator"};
937: my $filter = $it->{FILTER};
938:
939: my $title = $resource->compTitle();
940:
941: my $partLabel = "";
942: my $newBranchText = "";
943: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
944: # If this is a new branch, label it so
945: if ($params->{'isNewBranch'}) {
946: $newBranchText = "<img src='$location/branch.gif' alt=".mt('Branch')." />";
947: }
948:
949: # links to open and close the folder
950:
951: my $whitespace = $location.'/whitespace_21.gif';
952: my $linkopen = "<img src='$whitespace' alt='' />";
953: my $nomodal;
954: if (($params->{'modalLink'}) && (!$resource->is_sequence())) {
955: if ($link =~m{^(?:|/adm/wrapper)/ext/([^#]+)}) {
956: my $exturl = $1;
957: if (($ENV{'SERVER_PORT'} == 443) && ($exturl !~ /^https:/)) {
958: $nomodal = 1;
959: }
960: } elsif (($link eq "/public/$LONCAPA::match_domain/$LONCAPA::match_courseid/syllabus") &&
961: ($env{'request.course.id'}) && ($ENV{'SERVER_PORT'} == 443) &&
962: ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
963: $nomodal = 1;
964: }
965: my $esclink = &js_escape($link);
966: if ($nomodal) {
967: $linkopen .= "<a href=\"#\" onclick=\"javascript:window.open('$esclink','resourcepreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1'); return false;\" />";
968: } else {
969: $linkopen .= "<a href=\"$link\" onclick=\"javascript:openMyModal('$esclink',600,500,'yes','true'); return false;\">";
970: }
971: } else {
972: $linkopen .= "<a href=\"$link\">";
973: }
974: my $linkclose = "</a>";
975:
976: # Default icon: unknown page
977: my $icon = "<img class=\"LC_contentImage\" src='$location/unknown.gif' alt='' />";
978:
979: if ($resource->is_problem()) {
980: if ($part eq '0' || $params->{'condensed'}) {
981: $icon = '<img class="LC_contentImage" src="'.$location.'/';
982: if ($resource->is_task()) {
983: $icon .= 'task.gif" alt="'.&mt('Task');
984: } else {
985: $icon .= 'problem.gif" alt="'.&mt('Problem');
986: }
987: $icon .='" />';
988: } else {
989: $icon = $params->{'indentString'};
990: }
991: } else {
992: $icon = "<img class=\"LC_contentImage\" src='".&Apache::loncommon::icon($resource->src)."' alt='' />";
993: }
994:
995: # Display the correct map icon to open or shut map
996: if ($resource->is_map()) {
997: my $mapId = $resource->map_pc();
998: my $nowOpen = !defined($filter->{$mapId});
999: if ($it->{CONDITION}) {
1000: $nowOpen = !$nowOpen;
1001: }
1002: my $folderType;
1003: if (&advancedUser() && $resource->is_missing_map()) {
1004: $folderType = 'none';
1005: } else {
1006: $folderType = $resource->is_sequence() ? 'folder' : 'page';
1007: }
1008: my $title=$resource->title;
1009: $title=~s/\"/\&qout;/g;
1010: if (!$params->{'resource_no_folder_link'}) {
1011: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1012: $icon = "<img src='$location/arrow." . ($nowOpen ? 'closed' : 'open') . ".gif' alt='' />"
1013: ."<img class=\"LC_contentImage\" src='$location/$icon' alt=\""
1014: .($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1015: $linkopen = "<a href=\"" . $params->{'url'} . '?' .
1016: $params->{'queryString'} . '&filter=';
1017: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
1018: addToFilter($filter, $mapId) :
1019: removeFromFilter($filter, $mapId);
1020: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
1021: . $params->{'hereType'} . '&here=' .
1022: &escape($params->{'here'}) .
1023: '&jump=' .
1024: &escape($resource->symb()) .
1025: "&folderManip=1\">";
1026:
1027: } else {
1028: # Don't allow users to manipulate folder
1029: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1030: $icon = "<img class=\"LC_space\" src='$whitespace' alt='' />"."<img class=\"LC_contentImage\" src='$location/$icon' alt=\"".($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1031: if ($params->{'caller'} eq 'sequence') {
1032: $linkopen = "<a href=\"$link\">";
1033: } else {
1034: $linkopen = "";
1035: $linkclose = "";
1036: }
1037: }
1038: if (((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
1039: (&Apache::lonnet::allowed('cev',$env{'request.course.id'}))) &&
1040: ($resource->symb=~/\_\_\_[^\_]+\_\_\_uploaded/)) {
1041: if (!$params->{'map_no_edit_link'}) {
1042: my $icon = &Apache::loncommon::lonhttpdurl('/res/adm/pages').'/editmap.png';
1043: $editmapLink=' '.
1044: '<a href="/adm/coursedocs?command=directnav&symb='.&escape($resource->symb()).'">'.
1045: '<img src="'.$icon.'" alt="'.&mt('Edit Content').'" title="'.&mt('Edit Content').'" />'.
1046: '</a>';
1047: }
1048: }
1049: if ($params->{'mapHidden'} || $resource->randomout()) {
1050: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1051: }
1052: } else {
1053: if ($resource->randomout()) {
1054: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1055: }
1056: }
1057: if (!$resource->condval()) {
1058: $nonLinkedText .= ' <span class="LC_info">('.&mt('conditionally hidden').')</span> ';
1059: }
1060: if (($resource->is_practice()) && ($resource->is_raw_problem())) {
1061: $nonLinkedText .=' <span class="LC_info"><b>'.&mt('not graded').'</b></span>';
1062: }
1063:
1064: # We're done preparing and finally ready to start the rendering
1065: my $result = '<td class="LC_middle">';
1066: my $newfolderType = $resource->is_sequence() ? 'folder' : 'page';
1067:
1068: my $indentLevel = $params->{'indentLevel'};
1069: if ($newBranchText) { $indentLevel--; }
1070:
1071: # print indentation
1072: for (my $i = 0; $i < $indentLevel; $i++) {
1073: $result .= $params->{'indentString'};
1074: }
1075:
1076: # Decide what to display
1077: $result .= "$newBranchText$linkopen$icon$linkclose";
1078:
1079: my $curMarkerBegin = '';
1080: my $curMarkerEnd = '';
1081:
1082: # Is this the current resource?
1083: if (!$params->{'displayedHereMarker'} &&
1084: $resource->symb() eq $params->{'here'} ) {
1085: unless ($resource->is_map()) {
1086: $curMarkerBegin = '<span class="LC_current_nav_location">';
1087: $curMarkerEnd = '</span>';
1088: }
1089: $params->{'displayedHereMarker'} = 1;
1090: }
1091:
1092: if ($resource->is_problem() && $part ne '0' &&
1093: !$params->{'condensed'}) {
1094: my $displaypart=$resource->part_display($part);
1095: $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
1096: if ($link!~/\#/) { $link.='#'.&escape($part); }
1097: $title = "";
1098: }
1099:
1100: if ($params->{'condensed'} && $resource->countParts() > 1) {
1101: $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
1102: }
1103:
1104: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1105: $linkclose = '</a>';
1106: if ($params->{'modalLink'}) {
1107: my $esclink = &js_escape($link);
1108: if ($nomodal) {
1109: $linkopen = "<a href=\"#\" onclick=\"javascript:window.open('$esclink','resourcepreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1'); return false;\" />";
1110: } else {
1111: $linkopen = "<a href=\"$link\" onclick=\"javascript:openMyModal('$esclink',600,500,'yes','true'); return false;\">";
1112: }
1113: } else {
1114: $linkopen = "<a href=\"$link\">";
1115: }
1116: }
1117: $result .= "$curMarkerBegin$linkopen$title$partLabel$linkclose$curMarkerEnd$editmapLink$nonLinkedText</td>";
1118:
1119: return $result;
1120: }
1121:
1122: sub render_communication_status {
1123: my ($resource, $part, $params) = @_;
1124: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1125:
1126: my $link = $params->{"resourceLink"};
1127: my $linkopen = "<a href=\"$link\">";
1128: my $linkclose = "</a>";
1129: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1130:
1131: if ($resource->hasDiscussion()) {
1132: $discussionHTML = $linkopen .
1133: '<img alt="'.&mt('New Discussion').'" src="'.$location.'/chat.gif" title="'.&mt('New Discussion').'"/>' .
1134: $linkclose;
1135: }
1136:
1137: if ($resource->getFeedback()) {
1138: my $feedback = $resource->getFeedback();
1139: foreach my $msgid (split(/\,/, $feedback)) {
1140: if ($msgid) {
1141: $feedbackHTML .= ' <a href="/adm/email?display='
1142: . &escape($msgid) . '">'
1143: . '<img alt="'.&mt('New E-mail').'" src="'.$location.'/feedback.gif" title="'.&mt('New E-mail').'"/></a>';
1144: }
1145: }
1146: }
1147:
1148: if ($resource->getErrors()) {
1149: my $errors = $resource->getErrors();
1150: my $errorcount = 0;
1151: foreach my $msgid (split(/,/, $errors)) {
1152: last if ($errorcount>=10); # Only output 10 bombs maximum
1153: if ($msgid) {
1154: $errorcount++;
1155: $errorHTML .= ' <a href="/adm/email?display='
1156: . &escape($msgid) . '">'
1157: . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" title="'.&mt('New Error').'"/></a>';
1158: }
1159: }
1160: }
1161:
1162: if ($params->{'multipart'} && $part != '0') {
1163: $discussionHTML = $feedbackHTML = $errorHTML = '';
1164: }
1165: return "<td class=\"LC_middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
1166:
1167: }
1168: sub render_quick_status {
1169: my ($resource, $part, $params) = @_;
1170: my $result = "";
1171: my $firstDisplayed = !$params->{'condensed'} &&
1172: $params->{'multipart'} && $part eq "0";
1173:
1174: my $link = $params->{"resourceLink"};
1175: my $linkopen = "<a href=\"$link\">";
1176: my $linkclose = "</a>";
1177:
1178: $result .= '<td class="LC_middle">';
1179: if ($resource->is_problem() &&
1180: !$firstDisplayed) {
1181: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1182: my $alt = $iconAltTags{$icon};
1183: if ($icon) {
1184: my $location=
1185: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1186: $result .= $linkopen.'<img src="'.$location.'" alt="'.&mt($alt).'" title="'.&mt($alt).'" />'.$linkclose;
1187: } else {
1188: $result .= " ";
1189: }
1190: } else { # not problem, no icon
1191: $result .= " ";
1192: }
1193: $result .= "</td>\n";
1194: return $result;
1195: }
1196: sub render_long_status {
1197: my ($resource, $part, $params) = @_;
1198: my $result = '<td class="LC_middle LC_right">';
1199: my $firstDisplayed = !$params->{'condensed'} &&
1200: $params->{'multipart'} && $part eq "0";
1201:
1202: my $color;
1203: my $info = '';
1204: if ($resource->is_problem() || $resource->is_practice()) {
1205: $color = $colormap{$resource->status};
1206:
1207: if (dueInLessThan24Hours($resource, $part)) {
1208: $color = $hurryUpColor;
1209: $info = ' title="'.&mt('Due in less than 24 hours!').'"';
1210: } elsif (lastTry($resource, $part)) {
1211: unless (($resource->problemstatus($part) eq 'no') ||
1212: ($resource->problemstatus($part) eq 'no_feedback_ever')) {
1213: $color = $hurryUpColor;
1214: $info = ' title="'.&mt('One try remaining!').'"';
1215: }
1216: }
1217: }
1218:
1219: if ($resource->kind() eq "res" &&
1220: $resource->is_raw_problem() &&
1221: !$firstDisplayed) {
1222: if ($color) {$result .= '<span style="color:'.$color.'"'.$info.'><b>'; }
1223: $result .= getDescription($resource, $part);
1224: if ($color) {$result .= "</b></span>"; }
1225: }
1226: if ($resource->is_map() && &advancedUser() && $resource->randompick()) {
1227: $result .= &mt('(randomly select [_1])', $resource->randompick());
1228: }
1229: if ($resource->is_map() && &advancedUser() && $resource->randomorder()) {
1230: $result .= &mt('(randomly ordered)');
1231: }
1232:
1233: # Debugging code
1234: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1235: # ' - Part: ' . $part;
1236:
1237: $result .= "</td>\n";
1238:
1239: return $result;
1240: }
1241:
1242: # Colors obtained by taking the icons, matching the colors, and
1243: # possibly reducing the Value (HSV) of the color, if it's too bright
1244: # for text, generally by one third or so.
1245: my %statusColors =
1246: (
1247: $resObj->CLOSED => '#000000',
1248: $resObj->OPEN => '#998b13',
1249: $resObj->CORRECT => '#26933f',
1250: $resObj->INCORRECT => '#c48207',
1251: $resObj->ATTEMPTED => '#a87510',
1252: $resObj->ERROR => '#000000'
1253: );
1254: my %statusStrings =
1255: (
1256: $resObj->CLOSED => 'Not yet open',
1257: $resObj->OPEN => 'Open',
1258: $resObj->CORRECT => 'Correct',
1259: $resObj->INCORRECT => 'Incorrect',
1260: $resObj->ATTEMPTED => 'Attempted',
1261: $resObj->ERROR => 'Network Error'
1262: );
1263: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1264:
1265: sub render_parts_summary_status {
1266: my ($resource, $part, $params) = @_;
1267: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1268: if ($params->{showParts}) {
1269: return '<td></td>';
1270: }
1271:
1272: my $td = "<td align='right'>\n";
1273: my $endtd = "</td>\n";
1274: my @probs;
1275:
1276: if ($resource->contains_problem) {
1277: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1278: } else {
1279: @probs=($resource);
1280: }
1281: my $return;
1282: my %overallstatus;
1283: my $totalParts;
1284: foreach my $resource (@probs) {
1285: # If there is a single part, just show the simple status
1286: if ($resource->singlepart()) {
1287: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1288: $overallstatus{$status}++;
1289: $totalParts++;
1290: next;
1291: }
1292: # Now we can be sure the $part doesn't really matter.
1293: my $statusCount = $resource->simpleStatusCount();
1294: my @counts;
1295: foreach my $status (@statuses) {
1296: # decouple display order from the simpleStatusCount order
1297: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1298: if ($statusCount->[$slot]) {
1299: $overallstatus{$status}+=$statusCount->[$slot];
1300: $totalParts+=$statusCount->[$slot];
1301: }
1302: }
1303: }
1304: $return.= $td . $totalParts . ' parts: ';
1305: foreach my $status (@statuses) {
1306: if ($overallstatus{$status}) {
1307: $return.='<span style="color:' . $statusColors{$status}
1308: . '">' . $overallstatus{$status} . ' '
1309: . $statusStrings{$status} . '</span>';
1310: }
1311: }
1312: $return.= $endtd;
1313: return $return;
1314: }
1315:
1316: my @preparedColumns = (\&render_resource, \&render_communication_status,
1317: \&render_quick_status, \&render_long_status,
1318: \&render_parts_summary_status);
1319:
1320: sub setDefault {
1321: my ($val, $default) = @_;
1322: if (!defined($val)) { return $default; }
1323: return $val;
1324: }
1325:
1326: sub cmp_title {
1327: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1328: $atitle=~s/^\s*//;
1329: $btitle=~s/^\s*//;
1330: return $atitle cmp $btitle;
1331: }
1332:
1333: sub render {
1334: my $args = shift;
1335: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1336: my $result = '';
1337: # Configure the renderer.
1338: my $cols = $args->{'cols'};
1339: if (!defined($cols)) {
1340: # no columns, no nav maps.
1341: return '';
1342: }
1343: my $navmap;
1344: if (defined($args->{'navmap'})) {
1345: $navmap = $args->{'navmap'};
1346: }
1347:
1348: my $r = $args->{'r'};
1349: my $queryString = $args->{'queryString'};
1350: my $jump = $args->{'jump'};
1351: my $here = $args->{'here'};
1352: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1353: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1354: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1355: # before the current resource when using #current
1356:
1357: # If we were passed 'here' information, we are not rendering
1358: # after a folder manipulation, and we were not passed an
1359: # iterator, make sure we open the folders to show the "here"
1360: # marker
1361: my $filterHash = {};
1362: # Figure out what we're not displaying
1363: foreach my $item (split(/\,/, $env{"form.filter"})) {
1364: if ($item) {
1365: $filterHash->{$item} = "1";
1366: }
1367: }
1368:
1369: # Filter: Remember filter function and add our own filter: Refuse
1370: # to show hidden resources unless the user can see them.
1371: my $userCanSeeHidden = advancedUser();
1372: my $filterFunc = setDefault($args->{'filterFunc'},
1373: sub {return 1;});
1374: if (!$userCanSeeHidden) {
1375: # Without renaming the filterfunc, the server seems to go into
1376: # an infinite loop
1377: my $oldFilterFunc = $filterFunc;
1378: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1379: &$oldFilterFunc($res);};
1380: }
1381:
1382: my $condition = 0;
1383: if ($env{'form.condition'}) {
1384: $condition = 1;
1385: }
1386:
1387: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1388: # Step 1: Check to see if we have a navmap
1389: if (!defined($navmap)) {
1390: $navmap = Apache::lonnavmaps::navmap->new();
1391: if (!defined($navmap)) {
1392: # no longer in course
1393: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1394: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1395: }
1396: }
1397:
1398: # Step two: Locate what kind of here marker is necessary
1399: # Determine where the "here" marker is and where the screen jumps to.
1400:
1401: if ($env{'form.postsymb'} ne '') {
1402: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1403: } elsif ($env{'form.postdata'} ne '') {
1404: # couldn't find a symb, is there a URL?
1405: my $currenturl = $env{'form.postdata'};
1406: #$currenturl=~s/^http\:\/\///;
1407: #$currenturl=~s/^[^\/]+//;
1408: unless ($args->{'caller'} eq 'sequence') {
1409: $here = $jump = &Apache::lonnet::symbread($currenturl);
1410: }
1411: }
1412: if (($here eq '') && ($args->{'caller'} ne 'sequence')) {
1413: my $last;
1414: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1415: &GDBM_READER(),0640)) {
1416: $last=$hash{'last_known'};
1417: untie(%hash);
1418: }
1419: if ($last) { $here = $jump = $last; }
1420: }
1421:
1422: # Step three: Ensure the folders are open
1423: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1424: my $curRes;
1425: my $found = 0;
1426: my $here_is_navmaps = 0;
1427: if ($here =~ m{___\d+___adm/navmaps$}) {
1428: $here_is_navmaps = 1;
1429: }
1430:
1431: # We only need to do this if we need to open the maps to show the
1432: # current position. This will change the counter so we can't count
1433: # for the jump marker with this loop.
1434: while ($here && ($curRes = $mapIterator->next()) && !$found && !$here_is_navmaps) {
1435: if (ref($curRes) && $curRes->symb() eq $here) {
1436: my $mapStack = $mapIterator->getStack();
1437:
1438: # Ensure the parent maps are open
1439: for my $map (@{$mapStack}) {
1440: if ($condition) {
1441: undef $filterHash->{$map->map_pc()};
1442: } else {
1443: $filterHash->{$map->map_pc()} = 1;
1444: }
1445: }
1446: $found = 1;
1447: }
1448: }
1449: }
1450:
1451: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1452: # If this is a click on a folder or something, we want to preserve the "here"
1453: # from the querystring, and get the new "jump" marker
1454: $here = $env{'form.here'};
1455: $jump = $env{'form.jump'};
1456: }
1457:
1458: my $it = $args->{'iterator'};
1459: if (!defined($it)) {
1460: # Construct a default iterator based on $env{'form.'} information
1461:
1462: # Step 1: Check to see if we have a navmap
1463: if (!defined($navmap)) {
1464: $navmap = Apache::lonnavmaps::navmap->new();
1465: if (!defined($navmap)) {
1466: # no longer in course
1467: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1468: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1469: }
1470: }
1471:
1472: # See if we're being passed a specific map
1473: if ($args->{'iterator_map'}) {
1474: my $map = $args->{'iterator_map'};
1475: $map = $navmap->getResourceByUrl($map);
1476: if (ref($map)) {
1477: my $firstResource = $map->map_start();
1478: my $finishResource = $map->map_finish();
1479: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1480: } else {
1481: return;
1482: }
1483: } else {
1484: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
1485: }
1486: }
1487:
1488: # (re-)Locate the jump point, if any
1489: # Note this does not take filtering or hidden into account... need
1490: # to be fixed?
1491: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1492: my $curRes;
1493: my $foundJump = 0;
1494: my $counter = 0;
1495:
1496: while (($curRes = $mapIterator->next()) && !$foundJump) {
1497: if (ref($curRes)) { $counter++; }
1498:
1499: if (ref($curRes) && $jump eq $curRes->symb()) {
1500:
1501: # This is why we have to use the main iterator instead of the
1502: # potentially faster DFS: The count has to be the same, so
1503: # the order has to be the same, which DFS won't give us.
1504: $args->{'currentJumpIndex'} = $counter;
1505: $foundJump = 1;
1506: }
1507: }
1508:
1509: my $showParts = setDefault($args->{'showParts'}, 1);
1510: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1511: # keeps track of when the current resource is found,
1512: # so we can back up a few and put the anchor above the
1513: # current resource
1514: my $printKey = $args->{'printKey'};
1515: my $printCloseAll = $args->{'printCloseAll'};
1516: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1517:
1518: # Print key?
1519: if ($printKey) {
1520: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1521: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1522: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1523: if ($navmap->{LAST_CHECK}) {
1524: $result .=
1525: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('New discussion since').' '.
1526: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1527: '</td><td align="center" valign="bottom"> '.
1528: '<img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').'<p>'.
1529: '</td>';
1530: } else {
1531: $result .= '<td align="center" valign="bottom"> '.
1532: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1533: ' <img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').
1534: '</td>';
1535: }
1536:
1537: $result .= '</tr></table>';
1538: }
1539:
1540: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1541: my ($link,$text);
1542: if ($condition) {
1543: $link='navmaps?condition=0&filter=&'.$queryString.
1544: '&here='.&escape($here);
1545: $text='Close all folders';
1546: } else {
1547: $link='navmaps?condition=1&filter=&'.$queryString.
1548: '&here='.&escape($here);
1549: $text='Open all folders';
1550: }
1551: if ($args->{'caller'} eq 'navmapsdisplay') {
1552: unless ($args->{'notools'}) {
1553: &add_linkitem($args->{'linkitems'},'changefolder',
1554: "location.href='$link'",$text);
1555: }
1556: } else {
1557: $result.= '<a href="'.$link.'">'.&mt($text).'</a>';
1558: }
1559: $result .= "\n";
1560: }
1561:
1562: # Check for any unread discussions in all resources.
1563: if (($args->{'caller'} eq 'navmapsdisplay') && (!$args->{'notools'})) {
1564: &add_linkitem($args->{'linkitems'},'clearbubbles',
1565: 'document.clearbubbles.submit()',
1566: 'Mark all posts read');
1567: my $time=time;
1568: my $querystr = &HTML::Entities::encode($ENV{'QUERY_STRING'},'<>&"');
1569: $result .= (<<END);
1570: <form name="clearbubbles" method="post" action="/adm/feedback">
1571: <input type="hidden" name="navurl" value="$querystr" />
1572: <input type="hidden" name="navtime" value="$time" />
1573: END
1574: if ($args->{'sort'} eq 'discussion') {
1575: my $totdisc = 0;
1576: my $haveDisc = '';
1577: my @allres=$navmap->retrieveResources();
1578: foreach my $resource (@allres) {
1579: if ($resource->hasDiscussion()) {
1580: $haveDisc .= $resource->wrap_symb().':';
1581: $totdisc ++;
1582: }
1583: }
1584: if ($totdisc > 0) {
1585: $haveDisc =~ s/:$//;
1586: $result .= (<<END);
1587: <input type="hidden" name="navmaps" value="$haveDisc" />
1588: </form>
1589: END
1590: }
1591: }
1592: $result.='</form>';
1593: }
1594: if (($args->{'caller'} eq 'navmapsdisplay') &&
1595: ((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
1596: (&Apache::lonnet::allowed('cev',$env{'request.course.id'})))) {
1597: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1598: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1599: if ($env{'course.'.$env{'request.course.id'}.'.url'} eq
1600: "uploaded/$cdom/$cnum/default.sequence") {
1601: &add_linkitem($args->{'linkitems'},'edittoplevel',
1602: "javascript:gocmd('/adm/coursedocs','editdocs');",
1603: 'Content Editor');
1604: }
1605: }
1606:
1607: if ($args->{'caller'} eq 'navmapsdisplay') {
1608: $result .= &show_linkitems_toolbar($args,$condition);
1609: } elsif ($args->{'sort_html'}) {
1610: $result.=$args->{'sort_html'};
1611: }
1612:
1613: #$result .= "<br />\n";
1614: if ($r) {
1615: $r->print($result);
1616: $r->rflush();
1617: $result = "";
1618: }
1619: # End parameter setting
1620:
1621: $result .= "<br />\n";
1622:
1623: # Data
1624: $result.=&Apache::loncommon::start_data_table("LC_tableOfContent");
1625:
1626: my $res = "Apache::lonnavmaps::resource";
1627: my %condenseStatuses =
1628: ( $res->NETWORK_FAILURE => 1,
1629: $res->NOTHING_SET => 1,
1630: $res->CORRECT => 1 );
1631:
1632: # Shared variables
1633: $args->{'counter'} = 0; # counts the rows
1634: $args->{'indentLevel'} = 0;
1635: $args->{'isNewBranch'} = 0;
1636: $args->{'condensed'} = 0;
1637:
1638: my $location = &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace_21.gif");
1639: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' alt='' />");
1640: $args->{'displayedHereMarker'} = 0;
1641:
1642: # If we're suppressing empty sequences, look for them here.
1643: # We also do this even if $args->{'suppressEmptySequences'}
1644: # is not true, so we can hide empty sequences for which the
1645: # hiddenresource parameter is set to yes (at map level), or
1646: # mark as hidden for users who have $userCanSeeHidden.
1647: # Use DFS for speed, since structure actually doesn't matter,
1648: # except what map has what resources.
1649:
1650: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1651: $it->{FIRST_RESOURCE},
1652: $it->{FINISH_RESOURCE},
1653: {}, undef, 1);
1654:
1655: my $depth = 0;
1656: $dfsit->next();
1657: my $curRes = $dfsit->next();
1658: while ($depth > -1) {
1659: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1660: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1661:
1662: if (ref($curRes)) {
1663: # Parallel pre-processing: Do sequences have non-filtered-out children?
1664: if ($curRes->is_map()) {
1665: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1666: # Sequences themselves do not count as visible children,
1667: # unless those sequences also have visible children.
1668: # This means if a sequence appears, there's a "promise"
1669: # that there's something under it if you open it, somewhere.
1670: } elsif ($curRes->src()) {
1671: # Not a sequence: if it's filtered, ignore it, otherwise
1672: # rise up the stack and mark the sequences as having children
1673: if (&$filterFunc($curRes)) {
1674: for my $sequence (@{$dfsit->getStack()}) {
1675: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1676: }
1677: }
1678: }
1679: }
1680: } continue {
1681: $curRes = $dfsit->next();
1682: }
1683:
1684: my $displayedJumpMarker = 0;
1685: # Set up iteration.
1686: my $now = time();
1687: my $in24Hours = $now + 24 * 60 * 60;
1688: my $rownum = 0;
1689:
1690: # export "here" marker information
1691: $args->{'here'} = $here;
1692:
1693: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1694: my @resources;
1695: my $code='';# sub { !(shift->is_map();) };
1696: if ($args->{'sort'} eq 'title') {
1697: my $oldFilterFunc = $filterFunc;
1698: my $filterFunc=
1699: sub {
1700: my ($res)=@_;
1701: if ($res->is_map()) { return 0;}
1702: return &$oldFilterFunc($res);
1703: };
1704: @resources=$navmap->retrieveResources(undef,$filterFunc);
1705: @resources= sort { &cmp_title($a,$b) } @resources;
1706: } elsif ($args->{'sort'} eq 'duedate') {
1707: my $oldFilterFunc = $filterFunc;
1708: my $filterFunc=
1709: sub {
1710: my ($res)=@_;
1711: if (!$res->is_problem()) { return 0;}
1712: return &$oldFilterFunc($res);
1713: };
1714: @resources=$navmap->retrieveResources(undef,$filterFunc);
1715: @resources= sort {
1716: if ($a->duedate ne $b->duedate) {
1717: return $a->duedate cmp $b->duedate;
1718: }
1719: my $value=&cmp_title($a,$b);
1720: return $value;
1721: } @resources;
1722: } elsif ($args->{'sort'} eq 'discussion') {
1723: my $oldFilterFunc = $filterFunc;
1724: my $filterFunc=
1725: sub {
1726: my ($res)=@_;
1727: if (!$res->hasDiscussion() &&
1728: !$res->getFeedback() &&
1729: !$res->getErrors()) { return 0;}
1730: return &$oldFilterFunc($res);
1731: };
1732: @resources=$navmap->retrieveResources(undef,$filterFunc);
1733: @resources= sort { &cmp_title($a,$b) } @resources;
1734: } else {
1735: #unknow sort mechanism or default
1736: undef($args->{'sort'});
1737: }
1738:
1739: # Determine if page will be served with https in case
1740: # it contains a syllabus which uses an external URL
1741: # which points at an http site.
1742:
1743: my ($is_ssl,$cdom,$cnum,$hostname);
1744: if ($ENV{'SERVER_PORT'} == 443) {
1745: $is_ssl = 1;
1746: if ($r) {
1747: $hostname = $r->hostname();
1748: } else {
1749: $hostname = $ENV{'SERVER_NAME'};
1750: }
1751: }
1752: if ($env{'request.course.id'}) {
1753: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1754: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1755: }
1756:
1757: my $inhibitmenu;
1758: if ($args->{'modalLink'}) {
1759: $inhibitmenu = '&inhibitmenu=yes';
1760: }
1761:
1762: while (1) {
1763: if ($args->{'sort'}) {
1764: $curRes = shift(@resources);
1765: } else {
1766: $curRes = $it->next($closeAllPages);
1767: }
1768: if (!$curRes) { last; }
1769:
1770: # Maintain indentation level.
1771: if ($curRes == $it->BEGIN_MAP() ||
1772: $curRes == $it->BEGIN_BRANCH() ) {
1773: $args->{'indentLevel'}++;
1774: }
1775: if ($curRes == $it->END_MAP() ||
1776: $curRes == $it->END_BRANCH() ) {
1777: $args->{'indentLevel'}--;
1778: }
1779: # Notice new branches
1780: if ($curRes == $it->BEGIN_BRANCH()) {
1781: $args->{'isNewBranch'} = 1;
1782: }
1783:
1784: # If this isn't an actual resource, continue on
1785: if (!ref($curRes)) {
1786: next;
1787: }
1788:
1789: # If this has been filtered out, continue on
1790: if (!(&$filterFunc($curRes))) {
1791: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1792: next;
1793: }
1794:
1795: # If this is an empty sequence and we're filtering them, continue on
1796: $args->{'mapHidden'} = 0;
1797: if (($curRes->is_map()) && (!$curRes->{DATA}->{HAS_VISIBLE_CHILDREN})) {
1798: if ($args->{'suppressEmptySequences'}) {
1799: next;
1800: } else {
1801: my $mapname = &Apache::lonnet::declutter($curRes->src());
1802: $mapname = &Apache::lonnet::deversion($mapname);
1803: if (lc($navmap->get_mapparam(undef,$mapname,"0.hiddenresource")) eq 'yes') {
1804: if ($userCanSeeHidden) {
1805: $args->{'mapHidden'} = 1;
1806: } else {
1807: next;
1808: }
1809: }
1810: }
1811: }
1812:
1813: # If we're suppressing navmaps and this is a navmap, continue on
1814: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1815: next;
1816: }
1817:
1818: $args->{'counter'}++;
1819:
1820: # Does it have multiple parts?
1821: $args->{'multipart'} = 0;
1822: $args->{'condensed'} = 0;
1823: my @parts;
1824:
1825: # Decide what parts to show.
1826: if ($curRes->is_problem() && $showParts) {
1827: @parts = @{$curRes->parts()};
1828: $args->{'multipart'} = $curRes->multipart();
1829:
1830: if ($condenseParts) { # do the condensation
1831: if (!$args->{'condensed'}) {
1832: # Decide whether to condense based on similarity
1833: my $status = $curRes->status($parts[0]);
1834: my $due = $curRes->duedate($parts[0]);
1835: my $open = $curRes->opendate($parts[0]);
1836: my $statusAllSame = 1;
1837: my $dueAllSame = 1;
1838: my $openAllSame = 1;
1839: for (my $i = 1; $i < scalar(@parts); $i++) {
1840: if ($curRes->status($parts[$i]) != $status){
1841: $statusAllSame = 0;
1842: }
1843: if ($curRes->duedate($parts[$i]) != $due ) {
1844: $dueAllSame = 0;
1845: }
1846: if ($curRes->opendate($parts[$i]) != $open) {
1847: $openAllSame = 0;
1848: }
1849: }
1850: # $*allSame is true if all the statuses were
1851: # the same. Now, if they are all the same and
1852: # match one of the statuses to condense, or they
1853: # are all open with the same due date, or they are
1854: # all OPEN_LATER with the same open date, display the
1855: # status of the first non-zero part (to get the 'correct'
1856: # status right, since 0 is never 'correct' or 'open').
1857: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1858: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1859: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1860: @parts = ($parts[0]);
1861: $args->{'condensed'} = 1;
1862: }
1863: }
1864: # Multipart problem with one part: always "condense" (happens
1865: # to match the desirable behavior)
1866: if ($curRes->countParts() == 1) {
1867: @parts = ($parts[0]);
1868: $args->{'condensed'} = 1;
1869: }
1870: }
1871: }
1872:
1873: # If the multipart problem was condensed, "forget" it was multipart
1874: if (scalar(@parts) == 1) {
1875: $args->{'multipart'} = 0;
1876: } else {
1877: # Add part 0 so we display it correctly.
1878: unshift @parts, '0';
1879: }
1880:
1881: {
1882: my ($src,$symb,$anchor,$stack);
1883: if ($args->{'sort'}) {
1884: my $it = $navmap->getIterator(undef, undef, undef, 1);
1885: while ( my $res=$it->next()) {
1886: if (ref($res) &&
1887: $res->symb() eq $curRes->symb()) { last; }
1888: }
1889: $stack=$it->getStack();
1890: } else {
1891: $stack=$it->getStack();
1892: }
1893: ($src,$symb,$anchor)=getLinkForResource($stack);
1894: my $srcHasQuestion = $src =~ /\?/;
1895: if ($env{'request.course.id'}) {
1896: if (($is_ssl) && ($src =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) &&
1897: ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
1898: unless ((&Apache::lonnet::uses_sts()) || (&Apache::lonnet::waf_allssl($hostname))) {
1899: if ($hostname ne '') {
1900: $src = 'http://'.$hostname.$src;
1901: }
1902: $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
1903: $srcHasQuestion = 1;
1904: }
1905: } elsif (($is_ssl) && ($src =~ m{^\Q/adm/wrapper/ext/\E(?!https:)})) {
1906: unless ((&Apache::lonnet::uses_sts()) || (&Apache::lonnet::waf_allssl($hostname))) {
1907: if ($hostname ne '') {
1908: $src = 'http://'.$hostname.$src;
1909: }
1910: $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
1911: $srcHasQuestion = 1;
1912: }
1913: }
1914: }
1915: if (defined($anchor)) { $anchor='#'.$anchor; }
1916: if (($args->{'caller'} eq 'sequence') && ($curRes->is_map())) {
1917: $args->{"resourceLink"} = $src.($srcHasQuestion?'&':'?') .'navmap=1';
1918: } else {
1919: $args->{"resourceLink"} = $src.
1920: ($srcHasQuestion?'&':'?') .
1921: 'symb=' . &escape($symb).$inhibitmenu.$anchor;
1922: }
1923: }
1924: # Now, we've decided what parts to show. Loop through them and
1925: # show them.
1926: foreach my $part (@parts) {
1927: $rownum ++;
1928:
1929: $result .= &Apache::loncommon::start_data_table_row();
1930:
1931: # Set up some data about the parts that the cols might want
1932: my $filter = $it->{FILTER};
1933:
1934: # Now, display each column.
1935: foreach my $col (@$cols) {
1936: my $colHTML = '';
1937: if (ref($col)) {
1938: $colHTML .= &$col($curRes, $part, $args);
1939: } else {
1940: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1941: }
1942:
1943: # If this is the first column and it's time to print
1944: # the anchor, do so
1945: if ($col == $cols->[0] &&
1946: $args->{'counter'} == $args->{'currentJumpIndex'} -
1947: $currentJumpDelta) {
1948: # Jam the anchor after the <td> tag;
1949: # necessary for valid HTML (which Mozilla requires)
1950: $colHTML =~ s/\>/\>\<a name="curloc" \>\<\/a\>/;
1951: $displayedJumpMarker = 1;
1952: }
1953: $result .= $colHTML . "\n";
1954: }
1955: $result .= &Apache::loncommon::end_data_table_row();
1956: $args->{'isNewBranch'} = 0;
1957: }
1958:
1959: if ($r && $rownum % 20 == 0) {
1960: $r->print($result);
1961: $result = "";
1962: $r->rflush();
1963: }
1964: } continue {
1965: if ($r) {
1966: # If we have the connection, make sure the user is still connected
1967: my $c = $r->connection;
1968: if ($c->aborted()) {
1969: # Who cares what we do, nobody will see it anyhow.
1970: return '';
1971: }
1972: }
1973: }
1974:
1975: $result.=&Apache::loncommon::end_data_table();
1976:
1977: # Print out the part that jumps to #curloc if it exists
1978: # delay needed because the browser is processing the jump before
1979: # it finishes rendering, so it goes to the wrong place!
1980: # onload might be better, but this routine has no access to that.
1981: # On mozilla, the 0-millisecond timeout seems to prevent this;
1982: # it's quite likely this might fix other browsers, too, and
1983: # certainly won't hurt anything.
1984: if ($displayedJumpMarker) {
1985: $result .= &Apache::lonhtmlcommon::scripttag("
1986: if (location.href.indexOf('#curloc')==-1) {
1987: setTimeout(\"location += '#curloc';\", 0)
1988: }
1989: ");
1990: }
1991:
1992: if ($r) {
1993: $r->print($result);
1994: $result = "";
1995: $r->rflush();
1996: }
1997:
1998: return $result;
1999: }
2000:
2001: sub add_linkitem {
2002: my ($linkitems,$name,$cmd,$text)=@_;
2003: $$linkitems{$name}{'cmd'}=$cmd;
2004: $$linkitems{$name}{'text'}=&mt($text);
2005: }
2006:
2007: sub show_linkitems_toolbar {
2008: my ($args,$condition) = @_;
2009: my $result;
2010: if (ref($args) eq 'HASH') {
2011: if (ref($args->{'linkitems'}) eq 'HASH') {
2012: my $numlinks = scalar(keys(%{$args->{'linkitems'}}));
2013: if ($numlinks > 1) {
2014: $result = '<td>'.
2015: &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',
2016: undef,'RAT').
2017: '</td>'.
2018: '<td> </td>'.
2019: '<td class="LC_middle">'.&mt('Tools:').'</td>';
2020: }
2021: $result .= '<td align="left">'."\n".
2022: '<ul id="LC_toolbar">';
2023: my @linkorder = ('firsthomework','everything','uncompleted',
2024: 'changefolder','clearbubbles','edittoplevel');
2025: foreach my $link (@linkorder) {
2026: if (ref($args->{'linkitems'}{$link}) eq 'HASH') {
2027: if ($args->{'linkitems'}{$link}{'text'} ne '') {
2028: $args->{'linkitems'}{$link}{'cmd'}=~s/"/'/g;
2029: if ($args->{'linkitems'}{$link}{'cmd'}) {
2030: my $link_id = 'LC_content_toolbar_'.$link;
2031: if ($link eq 'changefolder') {
2032: if ($condition) {
2033: $link_id='LC_content_toolbar_changefolder_toggled';
2034: } else {
2035: $link_id='LC_content_toolbar_changefolder';
2036: }
2037: }
2038: $result .= '<li><a href="#" '.
2039: 'onclick="'.$args->{'linkitems'}{$link}{'cmd'}.'" '.
2040: 'id="'.$link_id.'" '.
2041: 'class="LC_toolbarItem" '.
2042: 'title="'.$args->{'linkitems'}{$link}{'text'}.'">'.
2043: '</a></li>'."\n";
2044: }
2045: }
2046: }
2047: }
2048: $result .= '</ul>'.
2049: '</td>';
2050: if (($numlinks==1) && (exists($args->{'linkitems'}{'edittoplevel'}))) {
2051: $result .= '<td><a href="'.$args->{'linkitems'}{'edittoplevel'}{'cmd'}.'">'.
2052: &mt('Content Editor').'</a></td>';
2053: }
2054: }
2055: if ($args->{'sort_html'}) {
2056: $result .= '<td> </td><td> </td><td> </td>'.
2057: '<td align="right">'.$args->{'sort_html'}.'</td>';
2058: }
2059: }
2060: if ($result) {
2061: $result = "<table><tr>$result</tr></table>";
2062: }
2063: return $result;
2064: }
2065:
2066: 1;
2067:
2068:
2069:
2070:
2071:
2072:
2073:
2074:
2075:
2076: package Apache::lonnavmaps::navmap;
2077:
2078: =pod
2079:
2080: =head1 Object: Apache::lonnavmaps::navmap
2081:
2082: =head2 Overview
2083:
2084: The navmap object's job is to provide access to the resources
2085: in the course as Apache::lonnavmaps::resource objects, and to
2086: query and manage the relationship between those resource objects.
2087:
2088: Generally, you'll use the navmap object in one of three basic ways.
2089: In order of increasing complexity and power:
2090:
2091: =over 4
2092:
2093: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
2094: various ways to obtain resource objects, based on various identifiers.
2095: Use this when you want to request information about one object or
2096: a handful of resources you already know the identities of, from some
2097: other source. For more about Ids, Symbs, and MapPcs, see the
2098: Resource documentation. Note that Url should be a B<last resort>,
2099: not your first choice; it only really works when there is only one
2100: instance of the resource in the course, which only applies to
2101: maps, and even that may change in the future (see the B<getResourceByUrl>
2102: documentation for more details.)
2103:
2104: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
2105: retrieves resources matching some criterion and returns them
2106: in a flat array, with no structure information. Use this when
2107: you are manipulating a series of resources, based on what map
2108: the are in, but do not care about branching, or exactly how
2109: the maps and resources are related. This is the most common case.
2110:
2111: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
2112: the course's navmap in various ways without writing the traversal
2113: code yourself. See iterator documentation below. Use this when
2114: you need to know absolutely everything about the course, including
2115: branches and the precise relationship between maps and resources.
2116:
2117: =back
2118:
2119: =head2 Creation And Destruction
2120:
2121: To create a navmap object, use the following function:
2122:
2123: =over 4
2124:
2125: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
2126:
2127: Creates a new navmap object. Returns the navmap object if this is
2128: successful, or B<undef> if not.
2129:
2130: =back
2131:
2132: =head2 Methods
2133:
2134: =over 4
2135:
2136: =item * B<getIterator>(first, finish, filter, condition):
2137:
2138: See iterator documentation below.
2139:
2140: =cut
2141:
2142: use strict;
2143: use GDBM_File;
2144: use Apache::lonnet;
2145: use LONCAPA;
2146:
2147: sub new {
2148: # magic invocation to create a class instance
2149: my $proto = shift;
2150: my $class = ref($proto) || $proto;
2151: my $self = {};
2152: bless($self); # So we can call change_user if necessary
2153:
2154: $self->{USERNAME} = shift || $env{'user.name'};
2155: $self->{DOMAIN} = shift || $env{'user.domain'};
2156: $self->{CODE} = shift;
2157: $self->{NOHIDE} = shift;
2158:
2159:
2160:
2161: # Resource cache stores navmap resources as we reference them. We generate
2162: # them on-demand so we don't pay for creating resources unless we use them.
2163: $self->{RESOURCE_CACHE} = {};
2164:
2165: # Network failure flag, if we accessed the course or user opt and
2166: # failed
2167: $self->{NETWORK_FAILURE} = 0;
2168:
2169: # We can only tie the nav hash as done below if the username/domain
2170: # match the env one. Otherwise change_user does everything we need...since we can't
2171: # assume there are course hashes for the specific requested user:domain
2172: # Note: change_user is also called if we need the nav hash when printing CODEd
2173: # assignments or printing an exam, in which the enclosing folder for the items in
2174: # the exam has hidden set.
2175: #
2176:
2177: if (($self->{USERNAME} eq $env{'user.name'}) && ($self->{DOMAIN} eq $env{'user.domain'}) &&
2178: !$self->{CODE} && !$self->{NOHIDE}) {
2179:
2180: # tie the nav hash
2181:
2182: my %navmaphash;
2183: my %parmhash;
2184: my $courseFn = $env{"request.course.fn"};
2185: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
2186: &GDBM_READER(), 0640))) {
2187: return undef;
2188: }
2189:
2190: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
2191: &GDBM_READER(), 0640)))
2192: {
2193: untie %{$self->{PARM_HASH}};
2194: return undef;
2195: }
2196:
2197: $self->{NAV_HASH} = \%navmaphash;
2198: $self->{PARM_HASH} = \%parmhash;
2199: $self->{PARM_CACHE} = {};
2200: } else {
2201: $self->change_user($self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE});
2202: }
2203:
2204: return $self;
2205: }
2206:
2207: #
2208: # In some instances it is useful to be able to dynamically change the
2209: # username/domain associated with a navmap (e.g. to navigate for someone
2210: # else besides the current user...if sufficiently privileged.
2211: # Parameters:
2212: # user - New user.
2213: # domain- Domain the user belongs to.
2214: # code - Anonymous CODE in use.
2215: # Implicit inputs:
2216: #
2217: sub change_user {
2218: my $self = shift;
2219: $self->{USERNAME} = shift;
2220: $self->{DOMAIN} = shift;
2221: $self->{CODE} = shift;
2222: $self->{NOHIDE} = shift;
2223:
2224: # If the hashes are already tied make sure to break that bond:
2225:
2226: untie %{$self->{NAV_HASH}};
2227: untie %{$self->{PARM_HASH}};
2228:
2229: # The assumption is that we have to
2230: # use lonmap here to re-read the hash and from it reconstruct
2231: # new big and parameter hashes. An implicit assumption at this time
2232: # is that the course file is probably not created locally yet
2233: # an that we will therefore just read without tying.
2234:
2235: my ($cdom, $cnum) = split(/\_/, $env{'request.course.id'});
2236:
2237: my %big_hash;
2238: &Apache::lonmap::loadmap($cnum, $cdom, $self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE}, \%big_hash);
2239: $self->{NAV_HASH} = \%big_hash;
2240:
2241:
2242:
2243: # Now clear the parm cache and reconstruct the parm hash fromt he big_hash
2244: # param.xxxx keys.
2245:
2246: $self->{PARM_CACHE} = {};
2247:
2248: my %parm_hash = {};
2249: foreach my $key (keys(%big_hash)) {
2250: if ($key =~ /^param\./) {
2251: my $param_key = $key;
2252: $param_key =~ s/^param\.//;
2253: $parm_hash{$param_key} = $big_hash{$key};
2254: }
2255: }
2256:
2257: $self->{PARM_HASH} = \%parm_hash;
2258:
2259: }
2260:
2261: sub generate_course_user_opt {
2262: my $self = shift;
2263: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
2264:
2265: my $uname=$self->{USERNAME};
2266: my $udom=$self->{DOMAIN};
2267:
2268: my $cid=$env{'request.course.id'};
2269: my $cdom=$env{'course.'.$cid.'.domain'};
2270: my $cnum=$env{'course.'.$cid.'.num'};
2271:
2272: # ------------------------------------------------- Get coursedata (if present)
2273: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
2274: # Check for network failure
2275: if (!ref($courseopt)) {
2276: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
2277: $self->{NETWORK_FAILURE} = 1;
2278: }
2279: undef($courseopt);
2280: }
2281:
2282: # --------------------------------------------------- Get userdata (if present)
2283:
2284: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
2285: # Check for network failure
2286: if (!ref($useropt)) {
2287: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
2288: $self->{NETWORK_FAILURE} = 1;
2289: }
2290: undef($useropt);
2291: }
2292:
2293: $self->{COURSE_OPT} = $courseopt;
2294: $self->{USER_OPT} = $useropt;
2295:
2296: $self->{COURSE_USER_OPT_GENERATED} = 1;
2297:
2298: return;
2299: }
2300:
2301:
2302:
2303: sub generate_email_discuss_status {
2304: my $self = shift;
2305: my $symb = shift;
2306: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
2307:
2308: my $cid=$env{'request.course.id'};
2309: my $cdom=$env{'course.'.$cid.'.domain'};
2310: my $cnum=$env{'course.'.$cid.'.num'};
2311:
2312: my %emailstatus = &Apache::lonnet::dump('email_status',$self->{DOMAIN},$self->{USERNAME});
2313: my $logoutTime = $emailstatus{'logout'};
2314: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
2315: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2316: $courseLeaveTime : $logoutTime);
2317: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2318: $cdom, $cnum);
2319: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
2320: $self->{DOMAIN},$self->{USERNAME},'lastread');
2321: my %lastreadtime = ();
2322: foreach my $key (keys(%lastread)) {
2323: my $shortkey = $key;
2324: $shortkey =~ s/_lastread$//;
2325: $lastreadtime{$shortkey} = $lastread{$key};
2326: }
2327:
2328: my %feedback=();
2329: my %error=();
2330: my @keys = &Apache::lonnet::getkeys('nohist_email',$self->{DOMAIN},
2331: $self->{USERNAME});
2332:
2333: foreach my $msgid (@keys) {
2334: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
2335: my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
2336: $symb,$error) = &Apache::lonmsg::unpackmsgid(&LONCAPA::escape($msgid));
2337: &Apache::lonenc::check_decrypt(\$symb);
2338: if (($fromcid ne '') && ($fromcid ne $cid)) {
2339: next;
2340: }
2341: if (defined($symb)) {
2342: if (defined($error) && $error == 1) {
2343: $error{$symb}.=','.$msgid;
2344: } else {
2345: $feedback{$symb}.=','.$msgid;
2346: }
2347: } else {
2348: my $plain=
2349: &LONCAPA::unescape(&LONCAPA::unescape($msgid));
2350: if ($plain=~/ \[([^\]]+)\]\:/) {
2351: my $url=$1;
2352: if ($plain=~/\:Error \[/) {
2353: $error{$url}.=','.$msgid;
2354: } else {
2355: $feedback{$url}.=','.$msgid;
2356: }
2357: }
2358: }
2359: }
2360: }
2361:
2362: #symbs of resources that have feedbacks (will be urls pre-2.3)
2363: $self->{FEEDBACK} = \%feedback;
2364: #or errors (will be urls pre 2.3)
2365: $self->{ERROR_MSG} = \%error;
2366: $self->{DISCUSSION_TIME} = \%discussiontime;
2367: $self->{EMAIL_STATUS} = \%emailstatus;
2368: $self->{LAST_READ} = \%lastreadtime;
2369:
2370: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2371: }
2372:
2373: sub get_user_data {
2374: my $self = shift;
2375: if ($self->{RETRIEVED_USER_DATA}) { return; }
2376:
2377: # Retrieve performance data on problems
2378: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
2379: $self->{DOMAIN},
2380: $self->{USERNAME});
2381: $self->{STUDENT_DATA} = \%student_data;
2382:
2383: $self->{RETRIEVED_USER_DATA} = 1;
2384: }
2385:
2386: sub get_discussion_data {
2387: my $self = shift;
2388: if ($self->{RETRIEVED_DISCUSSION_DATA}) {
2389: return $self->{DISCUSSION_DATA};
2390: }
2391:
2392: $self->generate_email_discuss_status();
2393:
2394: my $cid=$env{'request.course.id'};
2395: my $cdom=$env{'course.'.$cid.'.domain'};
2396: my $cnum=$env{'course.'.$cid.'.num'};
2397: # Retrieve discussion data for resources in course
2398: my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
2399:
2400:
2401: $self->{DISCUSSION_DATA} = \%discussion_data;
2402: $self->{RETRIEVED_DISCUSSION_DATA} = 1;
2403: return $self->{DISCUSSION_DATA};
2404: }
2405:
2406:
2407: # Internal function: Takes a key to look up in the nav hash and implements internal
2408: # memory caching of that key.
2409: sub navhash {
2410: my $self = shift; my $key = shift;
2411: return $self->{NAV_HASH}->{$key};
2412: }
2413:
2414: =pod
2415:
2416: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2417: false otherwise. Undefined course maps indicate an error somewhere in
2418: LON-CAPA, and you will not be able to proceed with using the navmap.
2419: See the B<NAV> screen for an example of using this.
2420:
2421: =cut
2422:
2423: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2424: sub courseMapDefined {
2425: my $self = shift;
2426: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
2427:
2428: my $firstres = $self->navhash("map_start_$uri");
2429: my $lastres = $self->navhash("map_finish_$uri");
2430: return $firstres && $lastres;
2431: }
2432:
2433: sub getIterator {
2434: my $self = shift;
2435: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
2436: shift, undef, shift,
2437: shift, shift);
2438: return $iterator;
2439: }
2440:
2441: # Private method: Does the given resource (as a symb string) have
2442: # current discussion? Returns 0 if chat/mail data not extracted.
2443: sub hasDiscussion {
2444: my $self = shift;
2445: my $symb = shift;
2446: $self->generate_email_discuss_status();
2447:
2448: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2449:
2450: #return defined($self->{DISCUSSION_TIME}->{$symb});
2451:
2452: # backward compatibility (bulletin boards used to be 'wrapped')
2453: my $ressymb = $self->wrap_symb($symb);
2454: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2455: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2456: } else {
2457: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2458: 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).
2459: }
2460: }
2461:
2462: sub last_post_time {
2463: my $self = shift;
2464: my $symb = shift;
2465: my $ressymb = $self->wrap_symb($symb);
2466: return $self->{DISCUSSION_TIME}->{$ressymb};
2467: }
2468:
2469: sub discussion_info {
2470: my $self = shift;
2471: my $symb = shift;
2472: my $filter = shift;
2473:
2474: $self->get_discussion_data();
2475:
2476: my $ressymb = $self->wrap_symb($symb);
2477: # keys used to store bulletinboard postings use 'unwrapped' symb.
2478: my $discsymb = &escape($self->unwrap_symb($ressymb));
2479: my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
2480: if (!$version) { return; }
2481:
2482: my $prevread = $self->{LAST_READ}{$ressymb};
2483:
2484: my $count = 0;
2485: my $hiddenflag = 0;
2486: my $deletedflag = 0;
2487: my ($hidden,$deleted,%info);
2488:
2489: for (my $id=$version; $id>0; $id--) {
2490: my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
2491: my @keys=split(/:/,$vkeys);
2492: if (grep(/^hidden$/ ,@keys)) {
2493: if (!$hiddenflag) {
2494: $hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
2495: $hiddenflag = 1;
2496: }
2497: } elsif (grep(/^deleted$/,@keys)) {
2498: if (!$deletedflag) {
2499: $deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
2500: $deletedflag = 1;
2501: }
2502: } else {
2503: if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
2504: if ($filter eq 'unread') {
2505: if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
2506: next;
2507: }
2508: }
2509: $count++;
2510: $info{$count}{'subject'} =
2511: $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
2512: $info{$count}{'id'} = $id;
2513: $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
2514: }
2515: }
2516: }
2517: if (wantarray) {
2518: return ($count,%info);
2519: }
2520: return $count;
2521: }
2522:
2523: sub wrap_symb {
2524: my $self = shift;
2525: my $symb = shift;
2526: if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
2527: unless ($symb =~ m|adm/wrapper/adm|) {
2528: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
2529: }
2530: }
2531: return $symb;
2532: }
2533:
2534: sub unwrap_symb {
2535: my $self = shift;
2536: my $ressymb = shift;
2537: my $discsymb = $ressymb;
2538: if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
2539: $discsymb = $1.$2;
2540: }
2541: return $discsymb;
2542: }
2543:
2544: # Private method: Does the given resource (as a symb string) have
2545: # current feedback? Returns the string in the feedback hash, which
2546: # will be false if it does not exist.
2547:
2548: sub getFeedback {
2549: my $self = shift;
2550: my $symb = shift;
2551: my $source = shift;
2552:
2553: $self->generate_email_discuss_status();
2554:
2555: if (!defined($self->{FEEDBACK})) { return ""; }
2556:
2557: my $feedback;
2558: if ($self->{FEEDBACK}->{$symb}) {
2559: $feedback = $self->{FEEDBACK}->{$symb};
2560: if ($self->{FEEDBACK}->{$source}) {
2561: $feedback .= ','.$self->{FEEDBACK}->{$source};
2562: }
2563: } else {
2564: if ($self->{FEEDBACK}->{$source}) {
2565: $feedback = $self->{FEEDBACK}->{$source};
2566: }
2567: }
2568: return $feedback;
2569: }
2570:
2571: # Private method: Get the errors for that resource (by source).
2572: sub getErrors {
2573: my $self = shift;
2574: my $symb = shift;
2575: my $src = shift;
2576:
2577: $self->generate_email_discuss_status();
2578:
2579: if (!defined($self->{ERROR_MSG})) { return ""; }
2580:
2581: my $errors;
2582: if ($self->{ERROR_MSG}->{$symb}) {
2583: $errors = $self->{ERROR_MSG}->{$symb};
2584: if ($self->{ERROR_MSG}->{$src}) {
2585: $errors .= ','.$self->{ERROR_MSG}->{$src};
2586: }
2587: } else {
2588: if ($self->{ERROR_MSG}->{$src}) {
2589: $errors = $self->{ERROR_MSG}->{$src};
2590: }
2591: }
2592: return $errors;
2593: }
2594:
2595: =pod
2596:
2597: =item * B<getById>(id):
2598:
2599: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2600: object for that resource. This method, or other methods that use it
2601: (as in the resource object) is the only proper way to obtain a
2602: resource object.
2603:
2604: =item * B<getBySymb>(symb):
2605:
2606: Based on the symb of the resource, get a resource object for that
2607: resource. This is one of the proper ways to get a resource object.
2608:
2609: =item * B<getByMapPc>(map_pc):
2610:
2611: Based on the map_pc of the resource, get a resource object for
2612: the given map. This is one of the proper ways to get a resource object.
2613:
2614: =cut
2615:
2616: # The strategy here is to cache the resource objects, and only construct them
2617: # as we use them. The real point is to prevent reading any more from the tied
2618: # hash than we have to, which should hopefully alleviate speed problems.
2619:
2620: sub getById {
2621: my $self = shift;
2622: my $id = shift;
2623:
2624: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2625: {
2626: return $self->{RESOURCE_CACHE}->{$id};
2627: }
2628:
2629: # resource handles inserting itself into cache.
2630: # Not clear why the quotes are necessary, but as of this
2631: # writing it doesn't work without them.
2632: return "Apache::lonnavmaps::resource"->new($self, $id);
2633: }
2634:
2635: sub getBySymb {
2636: my $self = shift;
2637: my $symb = shift;
2638:
2639: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
2640: my $map = $self->getResourceByUrl($mapUrl);
2641: my $returnvalue = undef;
2642: if (ref($map)) {
2643: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2644: }
2645: return $returnvalue;
2646: }
2647:
2648: sub getByMapPc {
2649: my $self = shift;
2650: my $map_pc = shift;
2651: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2652: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2653: return $self->getById($map_id);
2654: }
2655:
2656: =pod
2657:
2658: =item * B<firstResource>():
2659:
2660: Returns a resource object reference corresponding to the first
2661: resource in the navmap.
2662:
2663: =cut
2664:
2665: sub firstResource {
2666: my $self = shift;
2667: my $firstResource = $self->navhash('map_start_' .
2668: &Apache::lonnet::clutter($env{'request.course.uri'}));
2669: return $self->getById($firstResource);
2670: }
2671:
2672: =pod
2673:
2674: =item * B<finishResource>():
2675:
2676: Returns a resource object reference corresponding to the last resource
2677: in the navmap.
2678:
2679: =cut
2680:
2681: sub finishResource {
2682: my $self = shift;
2683: my $firstResource = $self->navhash('map_finish_' .
2684: &Apache::lonnet::clutter($env{'request.course.uri'}));
2685: return $self->getById($firstResource);
2686: }
2687:
2688: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2689: # the actual lookup; parmval caches the results.
2690: sub parmval {
2691: my $self = shift;
2692: my ($what,$symb,$recurse)=@_;
2693: my $hashkey = $what."|||".$symb;
2694: my $cache = $self->{PARM_CACHE};
2695: if (defined($self->{PARM_CACHE}->{$hashkey})) {
2696: if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {
2697: if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {
2698: if (wantarray) {
2699: return @{$self->{PARM_CACHE}->{$hashkey}};
2700: } else {
2701: return $self->{PARM_CACHE}->{$hashkey}->[0];
2702: }
2703: }
2704: } else {
2705: return $self->{PARM_CACHE}->{$hashkey};
2706: }
2707: }
2708: my $result = $self->parmval_real($what, $symb, $recurse);
2709: $self->{PARM_CACHE}->{$hashkey} = $result;
2710: if (wantarray) {
2711: return @{$result};
2712: }
2713: return $result->[0];
2714: }
2715:
2716:
2717: sub parmval_real {
2718: my $self = shift;
2719: my ($what,$symb,$recurse) = @_;
2720:
2721:
2722: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2723: $self->generate_course_user_opt();
2724:
2725: my $cid=$env{'request.course.id'};
2726: my $csec=$env{'request.course.sec'};
2727: my $cgroup='';
2728: my @cgrps=split(/:/,$env{'request.course.groups'});
2729: if (@cgrps > 0) {
2730: @cgrps = sort(@cgrps);
2731: $cgroup = $cgrps[0];
2732: }
2733: my $uname=$self->{USERNAME};
2734: my $udom=$self->{DOMAIN};
2735:
2736: unless ($symb) { return ['']; }
2737: my $result='';
2738:
2739: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
2740: $mapname = &Apache::lonnet::deversion($mapname);
2741: # ----------------------------------------------------- Cascading lookup scheme
2742: my $rwhat=$what;
2743: $what=~s/^parameter\_//;
2744: $what=~s/\_/\./;
2745:
2746: my $symbparm=$symb.'.'.$what;
2747: my $mapparm=$mapname.'___(all).'.$what;
2748: my $usercourseprefix=$cid;
2749:
2750:
2751:
2752: my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
2753: my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
2754: my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
2755:
2756:
2757: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2758: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
2759: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2760:
2761:
2762: my $courselevel= $usercourseprefix.'.'.$what;
2763: my $courselevelr=$usercourseprefix.'.'.$symbparm;
2764: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2765:
2766:
2767: my $useropt = $self->{USER_OPT};
2768: my $courseopt = $self->{COURSE_OPT};
2769: my $parmhash = $self->{PARM_HASH};
2770:
2771: # ---------------------------------------------------------- first, check user
2772: if ($uname and defined($useropt)) {
2773: if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }
2774: if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }
2775: if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }
2776: }
2777:
2778: # ------------------------------------------------------- second, check course
2779: if ($cgroup ne '' and defined($courseopt)) {
2780: if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }
2781: if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }
2782: if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }
2783: }
2784:
2785: if ($csec and defined($courseopt)) {
2786: if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }
2787: if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }
2788: if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }
2789: }
2790:
2791: if (defined($courseopt)) {
2792: if (defined($$courseopt{$courselevelr})) { return [$$courseopt{$courselevelr},'resource']; }
2793: }
2794:
2795: # ----------------------------------------------------- third, check map parms
2796:
2797: my $thisparm=$$parmhash{$symbparm};
2798: if (defined($thisparm)) { return [$thisparm,'map']; }
2799:
2800: # ----------------------------------------------------- fourth , check default
2801:
2802: my $meta_rwhat=$rwhat;
2803: $meta_rwhat=~s/\./_/g;
2804: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
2805: if (defined($default)) { return [$default,'resource']}
2806: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
2807: if (defined($default)) { return [$default,'resource']}
2808: # --------------------------------------------------- fifth, check more course
2809: if (defined($courseopt)) {
2810: if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }
2811: if (defined($$courseopt{$courselevel})) {
2812: my $ret = [$$courseopt{$courselevel},'course'];
2813: return $ret;
2814: }
2815: }
2816: # --------------------------------------------------- sixth , cascade up parts
2817:
2818: my ($space,@qualifier)=split(/\./,$rwhat);
2819: my $qualifier=join('.',@qualifier);
2820: unless ($space eq '0') {
2821: my @parts=split(/_/,$space);
2822: my $id=pop(@parts);
2823: my $part=join('_',@parts);
2824: if ($part eq '') { $part='0'; }
2825: my @partgeneral=$self->parmval($part.".$qualifier",$symb,1);
2826: if (defined($partgeneral[0])) { return \@partgeneral; }
2827: }
2828: if ($recurse) { return []; }
2829: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat);
2830: if (defined($pack_def)) { return [$pack_def,'resource']; }
2831: return [''];
2832: }
2833:
2834: sub recurseup_maps {
2835: my ($self,$mapname) = @_;
2836: my @recurseup;
2837: if ($mapname) {
2838: my $res = $self->getResourceByUrl($mapname);
2839: if (ref($res)) {
2840: my @pcs = split(/,/,$res->map_hierarchy());
2841: shift(@pcs);
2842: if (@pcs) {
2843: @recurseup = map { &Apache::lonnet::declutter($self->getByMapPc($_)->src()); } reverse(@pcs);
2844: }
2845: }
2846: }
2847: return @recurseup;
2848: }
2849:
2850: sub recursed_crumbs {
2851: my ($self,$mapurl,$restitle) = @_;
2852: my (@revmapinfo,@revmapres);
2853: my $mapres = $self->getResourceByUrl($mapurl);
2854: if (ref($mapres)) {
2855: @revmapres = map { $self->getByMapPc($_); } split(/,/,$mapres->map_breadcrumbs());
2856: shift(@revmapres);
2857: }
2858: my $allowedlength = 60;
2859: my $minlength = 5;
2860: my $allowedtitle = 30;
2861: if (($env{'environment.icons'} eq 'iconsonly') && (!$env{'browser.mobile'})) {
2862: $allowedlength = 100;
2863: $allowedtitle = 70;
2864: }
2865: if (length($restitle) > $allowedtitle) {
2866: $restitle = &truncate_crumb_text($restitle,$allowedtitle);
2867: }
2868: my $totallength = length($restitle);
2869: my @links;
2870:
2871: foreach my $map (@revmapres) {
2872: my $pc = $map->map_pc();
2873: next if ((!$pc) || ($pc == 1));
2874: push(@links,$map);
2875: my $text = $map->title();
2876: if ($text eq '') {
2877: $text = '...';
2878: }
2879: push(@revmapinfo,{'href' => $env{'request.use_absolute'}.$map->link().'?navmap=1','text' => $text,'no_mt' => 1,});
2880: $totallength += length($text);
2881: }
2882: my $numlinks = scalar(@links);
2883: if ($numlinks) {
2884: if ($totallength - $allowedlength > 0) {
2885: my $available = $allowedlength - length($restitle);
2886: my $avg = POSIX::ceil($available/$numlinks);
2887: if ($avg < $minlength) {
2888: $avg = $minlength;
2889: }
2890: @revmapinfo = ();
2891: foreach my $map (@links) {
2892: my $title = $map->title();
2893: if ($title eq '') {
2894: $title = '...';
2895: }
2896: my $showntitle = &truncate_crumb_text($title,$avg);
2897: if ($showntitle ne '') {
2898: push(@revmapinfo,{'href' => $env{'request.use_absolute'}.$map->link().'?navmap=1','text' => $showntitle,'no_mt' => 1,});
2899: }
2900: }
2901: }
2902: }
2903: if ($restitle ne '') {
2904: push(@revmapinfo,{'text' => $restitle, 'no_mt' => 1});
2905: }
2906: return @revmapinfo;
2907: }
2908:
2909: sub truncate_crumb_text {
2910: my ($title,$limit) = @_;
2911: my $showntitle = '';
2912: if (length($title) > $limit) {
2913: my @words = split(/\b\s*/,$title);
2914: if (@words == 1) {
2915: $showntitle = substr($title,0,$limit).' ...';
2916: } else {
2917: my $linklength = 0;
2918: my $num = 0;
2919: foreach my $word (@words) {
2920: $linklength += 1+length($word);
2921: if ($word eq '-') {
2922: $showntitle =~ s/ $//;
2923: $showntitle .= $word;
2924: } elsif ($linklength > $limit) {
2925: if ($num < @words) {
2926: $showntitle .= $word.' ...';
2927: last;
2928: } else {
2929: $showntitle .= $word;
2930: }
2931: } else {
2932: $showntitle .= $word.' ';
2933: }
2934: }
2935: $showntitle =~ s/ $//;
2936: }
2937: return $showntitle;
2938: } else {
2939: return $title;
2940: }
2941: }
2942:
2943: #
2944: # Determines the open/close dates for printing a map that
2945: # encloses a resource.
2946: #
2947: sub map_printdates {
2948: my ($self, $res, $part) = @_;
2949:
2950:
2951:
2952:
2953:
2954: my $opendate = $self->get_mapparam($res->symb(),'',"$part.printstartdate");
2955: my $closedate= $self->get_mapparam($res->symb(),'', "$part.printenddate");
2956:
2957:
2958: return ($opendate, $closedate);
2959: }
2960:
2961: sub get_mapparam {
2962: my ($self, $symb, $mapname, $what) = @_;
2963:
2964: # Ensure the course option hash is populated:
2965:
2966: $self->generate_course_user_opt();
2967:
2968: # Get the course id and section if there is one.
2969:
2970: my $cid=$env{'request.course.id'};
2971: my $csec=$env{'request.course.sec'};
2972: my $cgroup='';
2973: my @cgrps=split(/:/,$env{'request.course.groups'});
2974: if (@cgrps > 0) {
2975: @cgrps = sort(@cgrps);
2976: $cgroup = $cgrps[0];
2977: }
2978: my $uname=$self->{USERNAME};
2979: my $udom=$self->{DOMAIN};
2980:
2981: unless ($symb || $mapname) { return; }
2982: my $result='';
2983: my ($recursed,@recurseup);
2984:
2985: # Figure out which map we are in.
2986:
2987: if ($symb && !$mapname) {
2988: my ($id,$fn);
2989: ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
2990: $mapname = &Apache::lonnet::deversion($mapname);
2991: }
2992:
2993: my $rwhat=$what;
2994: $what=~s/^parameter\_//;
2995: $what=~s/\_/\./;
2996:
2997: # Build the hash keys for the lookup:
2998:
2999: my $symbparm=$symb.'.'.$what;
3000: my $mapparm=$mapname.'___(all).'.$what;
3001: my $usercourseprefix=$cid;
3002:
3003:
3004: my $grplevel = "$usercourseprefix.[$cgroup].$mapparm";
3005: my $seclevel = "$usercourseprefix.[$csec].$mapparm";
3006: my $courselevel = "$usercourseprefix.$mapparm";
3007:
3008:
3009: # Get handy references to the hashes we need in $self:
3010:
3011: my $useropt = $self->{USER_OPT};
3012: my $courseopt = $self->{COURSE_OPT};
3013: my $parmhash = $self->{PARM_HASH};
3014:
3015: # Check per user
3016:
3017:
3018:
3019: if ($uname and defined($useropt)) {
3020: if (defined($$useropt{$courselevel})) {
3021: return $$useropt{$courselevel};
3022: }
3023: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3024: unless ($recursed) {
3025: @recurseup = $self->recurseup_maps($mapname);
3026: $recursed = 1;
3027: }
3028: foreach my $item (@recurseup) {
3029: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
3030: if (defined($$useropt{$norecursechk})) {
3031: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3032: return $$useropt{$norecursechk};
3033: }
3034: }
3035: }
3036: }
3037: }
3038:
3039: # Check course -- group
3040:
3041:
3042:
3043: if ($cgroup ne '' and defined ($courseopt)) {
3044: if (defined($$courseopt{$grplevel})) {
3045: return $$courseopt{$grplevel};
3046: }
3047: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3048: unless ($recursed) {
3049: @recurseup = $self->recurseup_maps($mapname);
3050: $recursed = 1;
3051: }
3052: foreach my $item (@recurseup) {
3053: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
3054: if (defined($$courseopt{$norecursechk})) {
3055: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3056: return $$courseopt{$norecursechk};
3057: }
3058: }
3059: }
3060: }
3061: }
3062:
3063: # Check course -- section
3064:
3065:
3066:
3067:
3068:
3069: if ($csec and defined($courseopt)) {
3070: if (defined($$courseopt{$seclevel})) {
3071: return $$courseopt{$seclevel};
3072: }
3073: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3074: unless ($recursed) {
3075: @recurseup = $self->recurseup_maps($mapname);
3076: $recursed = 1;
3077: }
3078: foreach my $item (@recurseup) {
3079: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
3080: if (defined($$courseopt{$norecursechk})) {
3081: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3082: return $$courseopt{$norecursechk};
3083: }
3084: }
3085: }
3086: }
3087: }
3088: # Check the map parameters themselves:
3089:
3090: if ($symb) {
3091: my $symbparm=$symb.'.'.$what;
3092: my $thisparm = $$parmhash{$symbparm};
3093: if (defined($thisparm)) {
3094: return $thisparm;
3095: }
3096: }
3097:
3098:
3099: # Additional course parameters:
3100:
3101: if (defined($courseopt)) {
3102: if (defined($$courseopt{$courselevel})) {
3103: return $$courseopt{$courselevel};
3104: }
3105: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3106: unless ($recursed) {
3107: @recurseup = $self->recurseup_maps($mapname);
3108: $recursed = 1;
3109: }
3110: foreach my $item (@recurseup) {
3111: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
3112: if (defined($$courseopt{$norecursechk})) {
3113: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3114: return $$courseopt{$norecursechk};
3115: }
3116: }
3117: }
3118: }
3119: }
3120: return undef; # Unefined if we got here.
3121: }
3122:
3123: sub course_printdates {
3124: my ($self, $symb, $part) = @_;
3125:
3126:
3127: my $opendate = $self->getcourseparam($symb, $part . '.printstartdate');
3128: my $closedate = $self->getcourseparam($symb, $part . '.printenddate');
3129: return ($opendate, $closedate);
3130:
3131: }
3132:
3133: sub getcourseparam {
3134: my ($self, $symb, $what) = @_;
3135:
3136: $self->generate_course_user_opt(); # If necessary populate the hashes.
3137:
3138: my $uname = $self->{USERNAME};
3139: my $udom = $self->{DOMAIN};
3140:
3141: # Course, section, group ids come from the env:
3142:
3143: my $cid = $env{'request.course.id'};
3144: my $csec = $env{'request.course.sec'};
3145: my $cgroup = ''; # Assume no group
3146:
3147: my @cgroups = split(/:/, $env{'request.course.groups'});
3148: if(@cgroups > 0) {
3149: @cgroups = sort(@cgroups);
3150: $cgroup = $cgroups[0]; # There is a course group.
3151: }
3152: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
3153: $mapname = &Apache::lonnet::deversion($mapname);
3154:
3155: #
3156: # Make the various lookup keys:
3157: #
3158:
3159: $what=~s/^parameter\_//;
3160: $what=~s/\_/\./;
3161:
3162:
3163: my $symbparm = $symb . '.' . $what;
3164: my $mapparm=$mapname.'___(all).'.$what;
3165:
3166: # Local refs to the hashes we're going to look at:
3167:
3168: my $useropt = $self->{USER_OPT};
3169: my $courseopt = $self->{COURSE_OPT};
3170:
3171: #
3172: # We want the course level stuff from the way
3173: # parmval_real operates
3174: # TODO: Factor some of this stuff out of
3175: # both parmval_real and here
3176: #
3177: my $courselevel = $cid . '.' . $what;
3178: my $grplevel = $cid . '.[' . $cgroup . ']' . $what;
3179: my $seclevel = $cid . '.[' . $csec . ']' . $what;
3180:
3181:
3182: # Try for the user's course level option:
3183:
3184: if ($uname and defined($useropt)) {
3185: if (defined($$useropt{$courselevel})) {
3186: return $$useropt{$courselevel};
3187: }
3188: }
3189: # Try for the group's course level option:
3190:
3191: if ($cgroup ne '' and defined($courseopt)) {
3192: if (defined($$courseopt{$grplevel})) {
3193: return $$courseopt{$grplevel};
3194: }
3195: }
3196:
3197: # Try for section level parameters:
3198:
3199: if ($csec ne '' and defined($courseopt)) {
3200: if (defined($$courseopt{$seclevel})) {
3201: return $$courseopt{$seclevel};
3202: }
3203: }
3204: # Try for 'additional' course parameters:
3205:
3206: if (defined($courseopt)) {
3207: if (defined($$courseopt{$courselevel})) {
3208: return $$courseopt{$courselevel};
3209: }
3210: }
3211: return undef;
3212:
3213: }
3214:
3215:
3216: =pod
3217:
3218: =item * B<getResourceByUrl>(url,multiple):
3219:
3220: Retrieves a resource object by URL of the resource, unless the optional
3221: multiple parameter is included in which case an array of resource
3222: objects is returned. If passed a resource object, it will simply return
3223: it, so it is safe to use this method in code like
3224: "$res = $navmap->getResourceByUrl($res)"
3225: if you're not sure if $res is already an object, or just a URL. If the
3226: resource appears multiple times in the course, only the first instance
3227: will be returned (useful for maps), unless the multiple parameter has
3228: been included, in which case all instances are returned in an array.
3229:
3230: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall, noblockcheck):
3231:
3232: The map is a specification of a map to retreive the resources from,
3233: either as a url or as an object. The filterFunc is a reference to a
3234: function that takes a resource object as its one argument and returns
3235: true if the resource should be included, or false if it should not
3236: be. If recursive is true, the map will be recursively examined,
3237: otherwise it will not be. If bailout is true, the function will return
3238: as soon as it finds a resource, if false it will finish. If showall is
3239: true it will not hide maps that contain nothing but one other map. The
3240: noblockcheck arg is propagated to become the sixth arg in the call to
3241: lonnet::allowed when checking a resource's availability during collection
3242: of resources using the iterator. noblockcheck needs to be true if
3243: retrieveResources() was called by a routine that itself was called by
3244: lonnet::allowed, in order to avoid recursion. By default the map
3245: is the top-level map of the course, filterFunc is a function that
3246: always returns 1, recursive is true, bailout is false, showall is
3247: false. The resources will be returned in a list containing the
3248: resource objects for the corresponding resources, with B<no structure
3249: information> in the list; regardless of branching, recursion, etc.,
3250: it will be a flat list.
3251:
3252: Thus, this is suitable for cases where you don't want the structure,
3253: just a list of all resources. It is also suitable for finding out how
3254: many resources match a given description; for this use, if all you
3255: want to know is if I<any> resources match the description, the bailout
3256: parameter will allow you to avoid potentially expensive enumeration of
3257: all matching resources.
3258:
3259: =item * B<hasResource>(map, filterFunc, recursive, showall):
3260:
3261: Convenience method for
3262:
3263: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
3264:
3265: which will tell whether the map has resources matching the description
3266: in the filter function.
3267:
3268: =item * B<usedVersion>(url):
3269:
3270: Retrieves version infomation for a url. Returns the version (a number, or
3271: the string "mostrecent") for resources which have version information in
3272: the big hash.
3273:
3274: =cut
3275:
3276:
3277: sub getResourceByUrl {
3278: my $self = shift;
3279: my $resUrl = shift;
3280: my $multiple = shift;
3281:
3282: if (ref($resUrl)) { return $resUrl; }
3283:
3284: $resUrl = &Apache::lonnet::clutter($resUrl);
3285: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
3286: if (!$resId) { return ''; }
3287: if ($multiple) {
3288: my @resources = ();
3289: my @resIds = split (/,/, $resId);
3290: foreach my $id (@resIds) {
3291: my $resourceId = $self->getById($id);
3292: if ($resourceId) {
3293: push(@resources,$resourceId);
3294: }
3295: }
3296: return @resources;
3297: } else {
3298: if ($resId =~ /,/) {
3299: $resId = (split (/,/, $resId))[0];
3300: }
3301: return $self->getById($resId);
3302: }
3303: }
3304:
3305: sub retrieveResources {
3306: my $self = shift;
3307: my $map = shift;
3308: my $filterFunc = shift;
3309: if (!defined ($filterFunc)) {
3310: $filterFunc = sub {return 1;};
3311: }
3312: my $recursive = shift;
3313: if (!defined($recursive)) { $recursive = 1; }
3314: my $bailout = shift;
3315: if (!defined($bailout)) { $bailout = 0; }
3316: my $showall = shift;
3317: my $noblockcheck = shift;
3318: # Create the necessary iterator.
3319: if (!ref($map)) { # assume it's a url of a map.
3320: $map = $self->getResourceByUrl($map);
3321: }
3322:
3323: # If nothing was passed, assume top-level map
3324: if (!$map) {
3325: $map = $self->getById('0.0');
3326: }
3327:
3328: # Check the map's validity.
3329: if (!$map->is_map()) {
3330: # Oh, to throw an exception.... how I'd love that!
3331: return ();
3332: }
3333:
3334: # Get an iterator.
3335: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
3336: undef, $recursive, $showall);
3337:
3338: my @resources = ();
3339:
3340: if (&$filterFunc($map)) {
3341: push(@resources, $map);
3342: }
3343:
3344: # Run down the iterator and collect the resources.
3345: my $curRes;
3346:
3347: while ($curRes = $it->next(undef,$noblockcheck)) {
3348: if (ref($curRes)) {
3349: if (!&$filterFunc($curRes)) {
3350: next;
3351: }
3352:
3353: push(@resources, $curRes);
3354:
3355: if ($bailout) {
3356: return @resources;
3357: }
3358: }
3359:
3360: }
3361:
3362: return @resources;
3363: }
3364:
3365: sub hasResource {
3366: my $self = shift;
3367: my $map = shift;
3368: my $filterFunc = shift;
3369: my $recursive = shift;
3370: my $showall = shift;
3371:
3372: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
3373: }
3374:
3375: sub usedVersion {
3376: my $self = shift;
3377: my $linkurl = shift;
3378: return $self->navhash("version_$linkurl");
3379: }
3380:
3381: 1;
3382:
3383: package Apache::lonnavmaps::iterator;
3384: use Scalar::Util qw(weaken);
3385: use Apache::lonnet;
3386:
3387: =pod
3388:
3389: =back
3390:
3391: =head1 Object: navmap Iterator
3392:
3393: An I<iterator> encapsulates the logic required to traverse a data
3394: structure. navmap uses an iterator to traverse the course map
3395: according to the criteria you wish to use.
3396:
3397: To obtain an iterator, call the B<getIterator>() function of a
3398: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
3399: directly.) This will return a reference to the iterator:
3400:
3401: C<my $resourceIterator = $navmap-E<gt>getIterator();>
3402:
3403: To get the next thing from the iterator, call B<next>:
3404:
3405: C<my $nextThing = $resourceIterator-E<gt>next()>
3406:
3407: getIterator behaves as follows:
3408:
3409: =over 4
3410:
3411: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
3412:
3413: All parameters are optional. firstResource is a resource reference
3414: corresponding to where the iterator should start. It defaults to
3415: navmap->firstResource() for the corresponding nav map. finishResource
3416: corresponds to where you want the iterator to end, defaulting to
3417: navmap->finishResource(). filterHash is a hash used as a set
3418: containing strings representing the resource IDs, defaulting to
3419: empty. Condition is a 1 or 0 that sets what to do with the filter
3420: hash: If a 0, then only resources that exist IN the filterHash will be
3421: recursed on. If it is a 1, only resources NOT in the filterHash will
3422: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
3423: false (default), the iterator will only return the first level of map
3424: that is not just a single, 'redirecting' map. If true, the iterator
3425: will return all information, starting with the top-level map,
3426: regardless of content. returnTopMap, if true (default false), will
3427: cause the iterator to return the top-level map object (resource 0.0)
3428: before anything else.
3429:
3430: Thus, by default, only top-level resources will be shown. Change the
3431: condition to a 1 without changing the hash, and all resources will be
3432: shown. Changing the condition to 1 and including some values in the
3433: hash will allow you to selectively suppress parts of the navmap, while
3434: leaving it on 0 and adding things to the hash will allow you to
3435: selectively add parts of the nav map. See the handler code for
3436: examples.
3437:
3438: The iterator will return either a reference to a resource object, or a
3439: token representing something in the map, such as the beginning of a
3440: new branch. The possible tokens are:
3441:
3442: =over 4
3443:
3444: =item * B<END_ITERATOR>:
3445:
3446: The iterator has returned all that it's going to. Further calls to the
3447: iterator will just produce more of these. This is a "false" value, and
3448: is the only false value the iterator which will be returned, so it can
3449: be used as a loop sentinel.
3450:
3451: =item * B<BEGIN_MAP>:
3452:
3453: A new map is being recursed into. This is returned I<after> the map
3454: resource itself is returned.
3455:
3456: =item * B<END_MAP>:
3457:
3458: The map is now done.
3459:
3460: =item * B<BEGIN_BRANCH>:
3461:
3462: A branch is now starting. The next resource returned will be the first
3463: in that branch.
3464:
3465: =item * B<END_BRANCH>:
3466:
3467: The branch is now done.
3468:
3469: =back
3470:
3471: The tokens are retreivable via methods on the iterator object, i.e.,
3472: $iterator->END_MAP.
3473:
3474: Maps can contain empty resources. The iterator will automatically skip
3475: over such resources, but will still treat the structure
3476: correctly. Thus, a complicated map with several branches, but
3477: consisting entirely of empty resources except for one beginning or
3478: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
3479: but only one resource will be returned.
3480:
3481: =back
3482:
3483: =head2 Normal Usage
3484:
3485: Normal usage of the iterator object is to do the following:
3486:
3487: my $it = $navmap->getIterator([your params here]);
3488: my $curRes;
3489: while ($curRes = $it->next()) {
3490: [your logic here]
3491: }
3492:
3493: Note that inside of the loop, it's frequently useful to check if
3494: "$curRes" is a reference or not with the reference function; only
3495: resource objects will be references, and any non-references will
3496: be the tokens described above.
3497:
3498: The next() routine can take two (optional) arguments:
3499: closeAllPages - if true will not recurse down a .page
3500: noblockcheck - passed to browsePriv() for passing as sixth arg to
3501: call to lonnet::allowed. This needs to be set if retrieveResources
3502: was already called from another routine called within lonnet::allowed,
3503: so as to prevent recursion.
3504:
3505: Also note there is some old code floating around that tries to track
3506: the depth of the iterator to see when it's done; do not copy that
3507: code. It is difficult to get right and harder to understand than
3508: this. They should be migrated to this new style.
3509:
3510: =cut
3511:
3512: # Here are the tokens for the iterator:
3513:
3514: sub END_ITERATOR { return 0; }
3515: sub BEGIN_MAP { return 1; } # begining of a new map
3516: sub END_MAP { return 2; } # end of the map
3517: sub BEGIN_BRANCH { return 3; } # beginning of a branch
3518: sub END_BRANCH { return 4; } # end of a branch
3519: sub FORWARD { return 1; } # go forward
3520: sub BACKWARD { return 2; }
3521:
3522: sub min {
3523: (my $a, my $b) = @_;
3524: if ($a < $b) { return $a; } else { return $b; }
3525: }
3526:
3527: sub new {
3528: # magic invocation to create a class instance
3529: my $proto = shift;
3530: my $class = ref($proto) || $proto;
3531: my $self = {};
3532:
3533: weaken($self->{NAV_MAP} = shift);
3534: return undef unless ($self->{NAV_MAP});
3535:
3536: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3537: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3538:
3539: # Handle the parameters
3540: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3541: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3542:
3543: # If the given resources are just the ID of the resource, get the
3544: # objects
3545: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3546: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3547: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3548: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3549:
3550: $self->{FILTER} = shift;
3551:
3552: # A hash, used as a set, of resource already seen
3553: $self->{ALREADY_SEEN} = shift;
3554: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
3555: $self->{CONDITION} = shift;
3556:
3557: # Do we want to automatically follow "redirection" maps?
3558: $self->{FORCE_TOP} = shift;
3559:
3560: # Do we want to return the top-level map object (resource 0.0)?
3561: $self->{RETURN_0} = shift;
3562: # have we done that yet?
3563: $self->{HAVE_RETURNED_0} = 0;
3564:
3565: # Now, we need to pre-process the map, by walking forward and backward
3566: # over the parts of the map we're going to look at.
3567:
3568: # The processing steps are exactly the same, except for a few small
3569: # changes, so I bundle those up in the following list of two elements:
3570: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
3571: # first_resource).
3572: # This prevents writing nearly-identical code twice.
3573: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
3574: 'FIRST_RESOURCE'],
3575: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
3576: 'FINISH_RESOURCE'] );
3577:
3578: my $maxDepth = 0; # tracks max depth
3579:
3580: # If there is only one resource in this map, and it's a map, we
3581: # want to remember that, so the user can ask for the first map
3582: # that isn't just a redirector.
3583: my $resource; my $resourceCount = 0;
3584:
3585: # Documentation on this algorithm can be found in the CVS repository at
3586: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
3587: # in that file.
3588: # **1**
3589:
3590: foreach my $pass (@iterations) {
3591: my $direction = $pass->[0];
3592: my $valName = $pass->[1];
3593: my $nextResourceMethod = $pass->[2];
3594: my $firstResourceName = $pass->[3];
3595:
3596: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
3597: $self->{FIRST_RESOURCE},
3598: $self->{FINISH_RESOURCE},
3599: {}, undef, 0, $direction);
3600:
3601: # prime the recursion
3602: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
3603: $iterator->next();
3604: my $curRes = $iterator->next();
3605: my $depth = 1;
3606: while ($depth > 0) {
3607: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
3608: if ($curRes == $iterator->END_MAP()) { $depth--; }
3609:
3610: if (ref($curRes)) {
3611: # If there's only one resource, this will save it
3612: # we have to filter empty resources from consideration here,
3613: # or even "empty", redirecting maps have two (start & finish)
3614: # or three (start, finish, plus redirector)
3615: if($direction == FORWARD && $curRes->src()) {
3616: $resource = $curRes; $resourceCount++;
3617: }
3618: my $resultingVal = $curRes->{DATA}->{$valName};
3619: my $nextResources = $curRes->$nextResourceMethod();
3620: my $nextCount = scalar(@{$nextResources});
3621:
3622: if ($nextCount == 1) { # **3**
3623: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
3624: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
3625: }
3626:
3627: if ($nextCount > 1) { # **4**
3628: foreach my $res (@{$nextResources}) {
3629: my $current = $res->{DATA}->{$valName} || 999999999;
3630: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
3631: }
3632: }
3633: }
3634:
3635: # Assign the final val (**2**)
3636: if (ref($curRes) && $direction == BACKWARD()) {
3637: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
3638: $curRes->{DATA}->{BOT_UP_VAL});
3639:
3640: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
3641: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
3642: }
3643:
3644: $curRes = $iterator->next();
3645: }
3646: }
3647:
3648: # Check: Was this only one resource, a map?
3649: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
3650: my $firstResource = $resource->map_start();
3651: my $finishResource = $resource->map_finish();
3652: return Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3653: $finishResource, $self->{FILTER},
3654: $self->{ALREADY_SEEN},
3655: $self->{CONDITION},
3656: $self->{FORCE_TOP});
3657: }
3658:
3659: # Set up some bookkeeping information.
3660: $self->{CURRENT_DEPTH} = 0;
3661: $self->{MAX_DEPTH} = $maxDepth;
3662: $self->{STACK} = [];
3663: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3664: $self->{FINISHED} = 0; # When true, the iterator has finished
3665:
3666: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
3667: push @{$self->{STACK}}, [];
3668: }
3669:
3670: # Prime the recursion w/ the first resource **5**
3671: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
3672: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
3673:
3674: bless ($self);
3675: return $self;
3676: }
3677:
3678: sub next {
3679: my $self = shift;
3680: my $closeAllPages=shift;
3681: my $noblockcheck = shift;
3682: if ($self->{FINISHED}) {
3683: return END_ITERATOR();
3684: }
3685:
3686: # If we want to return the top-level map object, and haven't yet,
3687: # do so.
3688: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
3689: $self->{HAVE_RETURNED_0} = 1;
3690: my $nextTopLevel = $self->{NAV_MAP}->getById('0.0');
3691: return $self->{NAV_MAP}->getById('0.0');
3692: }
3693: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {
3694: $self->{HAVE_RETURNED_0_BEGIN_MAP} = 1;
3695: return $self->BEGIN_MAP();
3696: }
3697:
3698: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3699: # grab the next from the recursive iterator
3700: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
3701:
3702: # is it a begin or end map? If so, update the depth
3703: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3704: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3705:
3706: # Are we back at depth 0? If so, stop recursing
3707: if ($self->{RECURSIVE_DEPTH} == 0) {
3708: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3709: }
3710: return $next;
3711: }
3712:
3713: if (defined($self->{FORCE_NEXT})) {
3714: my $tmp = $self->{FORCE_NEXT};
3715: $self->{FORCE_NEXT} = undef;
3716: return $tmp;
3717: }
3718:
3719: # Have we not yet begun? If not, return BEGIN_MAP and
3720: # remember we've started.
3721: if ( !$self->{STARTED} ) {
3722: $self->{STARTED} = 1;
3723: return $self->BEGIN_MAP();
3724: }
3725:
3726: # Here's the guts of the iterator.
3727:
3728: # Find the next resource, if any.
3729: my $found = 0;
3730: my $i = $self->{MAX_DEPTH};
3731: my $newDepth;
3732: my $here;
3733: while ( $i >= 0 && !$found ) {
3734: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
3735: $here = pop @{$self->{STACK}->[$i]}; # **7**
3736: $found = 1;
3737: $newDepth = $i;
3738: }
3739: $i--;
3740: }
3741:
3742: # If we still didn't find anything, we're done.
3743: if ( !$found ) {
3744: # We need to get back down to the correct branch depth
3745: if ( $self->{CURRENT_DEPTH} > 0 ) {
3746: $self->{CURRENT_DEPTH}--;
3747: return END_BRANCH();
3748: } else {
3749: $self->{FINISHED} = 1;
3750: return END_MAP();
3751: }
3752: }
3753:
3754: # If this is not a resource, it must be an END_BRANCH marker we want
3755: # to return directly.
3756: if (!ref($here)) { # **8**
3757: if ($here == END_BRANCH()) { # paranoia, in case of later extension
3758: $self->{CURRENT_DEPTH}--;
3759: return $here;
3760: }
3761: }
3762:
3763: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
3764: $self->{HERE} = $here;
3765:
3766: # Get to the right level
3767: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
3768: push @{$self->{STACK}->[$newDepth]}, $here;
3769: $self->{CURRENT_DEPTH}--;
3770: return END_BRANCH();
3771: }
3772: if ( $self->{CURRENT_DEPTH} < $newDepth) {
3773: push @{$self->{STACK}->[$newDepth]}, $here;
3774: $self->{CURRENT_DEPTH}++;
3775: return BEGIN_BRANCH();
3776: }
3777:
3778: # If we made it here, we have the next resource, and we're at the
3779: # right branch level. So let's examine the resource for where
3780: # we can get to from here.
3781:
3782: # So we need to look at all the resources we can get to from here,
3783: # categorize them if we haven't seen them, remember if we have a new
3784: my $nextUnfiltered = $here->getNext();
3785:
3786:
3787: my $maxDepthAdded = -1;
3788:
3789: for (@$nextUnfiltered) {
3790: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
3791: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3792: push @{$self->{STACK}->[$depth]}, $_;
3793: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
3794: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
3795: }
3796: }
3797:
3798: # Is this the end of a branch? If so, all of the resources examined above
3799: # led to lower levels than the one we are currently at, so we push a END_BRANCH
3800: # marker onto the stack so we don't forget.
3801: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3802: # BC branch and gets to C, it will see F as the only next resource, but it's
3803: # one level lower. Thus, this is the end of the branch, since there are no
3804: # more resources added to this level or above.
3805: # We don't do this if the examined resource is the finish resource,
3806: # because the condition given above is true, but the "END_MAP" will
3807: # take care of things and we should already be at depth 0.
3808: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
3809: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
3810: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3811: }
3812:
3813: # That ends the main iterator logic. Now, do we want to recurse
3814: # down this map (if this resource is a map)?
3815: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
3816: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION}) &&
3817: ($env{'request.role.adv'} || !$self->{HERE}->randomout())) {
3818: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3819: my $firstResource = $self->{HERE}->map_start();
3820: my $finishResource = $self->{HERE}->map_finish();
3821: $self->{RECURSIVE_ITERATOR} =
3822: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3823: $finishResource, $self->{FILTER},
3824: $self->{ALREADY_SEEN},
3825: $self->{CONDITION},
3826: $self->{FORCE_TOP});
3827: }
3828:
3829: # If this is a blank resource, don't actually return it.
3830: # Should you ever find you need it, make sure to add an option to the code
3831: # that you can use; other things depend on this behavior.
3832: my $browsePriv = $self->{HERE}->browsePriv($noblockcheck);
3833: if (!$self->{HERE}->src() ||
3834: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
3835: return $self->next($closeAllPages);
3836: }
3837:
3838: return $self->{HERE};
3839:
3840: }
3841:
3842: =pod
3843:
3844: The other method available on the iterator is B<getStack>, which
3845: returns an array populated with the current 'stack' of maps, as
3846: references to the resource objects. Example: This is useful when
3847: making the navigation map, as we need to check whether we are under a
3848: page map to see if we need to link directly to the resource, or to the
3849: page. The first elements in the array will correspond to the top of
3850: the stack (most inclusive map).
3851:
3852: =cut
3853:
3854: sub getStack {
3855: my $self=shift;
3856:
3857: my @stack;
3858:
3859: $self->populateStack(\@stack);
3860:
3861: return \@stack;
3862: }
3863:
3864: # Private method: Calls the iterators recursively to populate the stack.
3865: sub populateStack {
3866: my $self=shift;
3867: my $stack = shift;
3868:
3869: push @$stack, $self->{HERE} if ($self->{HERE});
3870:
3871: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3872: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3873: }
3874: }
3875:
3876: 1;
3877:
3878: package Apache::lonnavmaps::DFSiterator;
3879: use Scalar::Util qw(weaken);
3880: use Apache::lonnet;
3881:
3882: # Not documented in the perldoc: This is a simple iterator that just walks
3883: # through the nav map and presents the resources in a depth-first search
3884: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3885: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3886: # useful for pre-processing of some kind, and is in fact used by the main
3887: # iterator that way, but that's about it.
3888: # One could imagine merging this into the init routine of the main iterator,
3889: # but this might as well be left separate, since it is possible some other
3890: # use might be found for it. - Jeremy
3891:
3892: # Unlike the main iterator, this DOES return all resources, even blank ones.
3893: # The main iterator needs them to correctly preprocess the map.
3894:
3895: sub BEGIN_MAP { return 1; } # begining of a new map
3896: sub END_MAP { return 2; } # end of the map
3897: sub FORWARD { return 1; } # go forward
3898: sub BACKWARD { return 2; }
3899:
3900: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3901: # filter hash ref (or undef), already seen hash or undef, condition
3902: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
3903: sub new {
3904: # magic invocation to create a class instance
3905: my $proto = shift;
3906: my $class = ref($proto) || $proto;
3907: my $self = {};
3908:
3909: weaken($self->{NAV_MAP} = shift);
3910: return undef unless ($self->{NAV_MAP});
3911:
3912: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3913: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3914:
3915: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3916: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3917:
3918: # If the given resources are just the ID of the resource, get the
3919: # objects
3920: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3921: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3922: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3923: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3924:
3925: $self->{FILTER} = shift;
3926:
3927: # A hash, used as a set, of resource already seen
3928: $self->{ALREADY_SEEN} = shift;
3929: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
3930: $self->{CONDITION} = shift;
3931: $self->{DIRECTION} = shift || FORWARD();
3932:
3933: # Flag: Have we started yet?
3934: $self->{STARTED} = 0;
3935:
3936: # Should we continue calling the recursive iterator, if any?
3937: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3938: # The recursive iterator, if any
3939: $self->{RECURSIVE_ITERATOR} = undef;
3940: # Are we recursing on a map, or a branch?
3941: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3942: # And the count of how deep it is, so that this iterator can keep track of
3943: # when to pick back up again.
3944: $self->{RECURSIVE_DEPTH} = 0;
3945:
3946: # For keeping track of our branches, we maintain our own stack
3947: $self->{STACK} = [];
3948:
3949: # Start with the first resource
3950: if ($self->{DIRECTION} == FORWARD) {
3951: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
3952: } else {
3953: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
3954: }
3955:
3956: bless($self);
3957: return $self;
3958: }
3959:
3960: sub next {
3961: my $self = shift;
3962:
3963: # Are we using a recursive iterator? If so, pull from that and
3964: # watch the depth; we want to resume our level at the correct time.
3965: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3966: # grab the next from the recursive iterator
3967: my $next = $self->{RECURSIVE_ITERATOR}->next();
3968:
3969: # is it a begin or end map? Update depth if so
3970: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3971: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3972:
3973: # Are we back at depth 0? If so, stop recursing.
3974: if ($self->{RECURSIVE_DEPTH} == 0) {
3975: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3976: }
3977:
3978: return $next;
3979: }
3980:
3981: # Is there a current resource to grab? If not, then return
3982: # END_MAP, which will end the iterator.
3983: if (scalar(@{$self->{STACK}}) == 0) {
3984: return $self->END_MAP();
3985: }
3986:
3987: # Have we not yet begun? If not, return BEGIN_MAP and
3988: # remember that we've started.
3989: if ( !$self->{STARTED} ) {
3990: $self->{STARTED} = 1;
3991: return $self->BEGIN_MAP;
3992: }
3993:
3994: # Get the next resource in the branch
3995: $self->{HERE} = pop @{$self->{STACK}};
3996:
3997: # remember that we've seen this, so we don't return it again later
3998: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3999:
4000: # Get the next possible resources
4001: my $nextUnfiltered;
4002: if ($self->{DIRECTION} == FORWARD()) {
4003: $nextUnfiltered = $self->{HERE}->getNext();
4004: } else {
4005: $nextUnfiltered = $self->{HERE}->getPrevious();
4006: }
4007: my $next = [];
4008:
4009: # filter the next possibilities to remove things we've
4010: # already seen.
4011: foreach my $item (@$nextUnfiltered) {
4012: if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
4013: push @$next, $item;
4014: }
4015: }
4016:
4017: while (@$next) {
4018: # copy the next possibilities over to the stack
4019: push @{$self->{STACK}}, shift @$next;
4020: }
4021:
4022: # If this is a map and we want to recurse down it... (not filtered out)
4023: if ($self->{HERE}->is_map() &&
4024: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
4025: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
4026: my $firstResource = $self->{HERE}->map_start();
4027: my $finishResource = $self->{HERE}->map_finish();
4028:
4029: $self->{RECURSIVE_ITERATOR} =
4030: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
4031: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
4032: $self->{CONDITION}, $self->{DIRECTION});
4033: }
4034:
4035: return $self->{HERE};
4036: }
4037:
4038: # Identical to the full iterator methods of the same name. Hate to copy/paste
4039: # but I also hate to "inherit" either iterator from the other.
4040:
4041: sub getStack {
4042: my $self=shift;
4043:
4044: my @stack;
4045:
4046: $self->populateStack(\@stack);
4047:
4048: return \@stack;
4049: }
4050:
4051: # Private method: Calls the iterators recursively to populate the stack.
4052: sub populateStack {
4053: my $self=shift;
4054: my $stack = shift;
4055:
4056: push @$stack, $self->{HERE} if ($self->{HERE});
4057:
4058: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
4059: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
4060: }
4061: }
4062:
4063: 1;
4064:
4065: package Apache::lonnavmaps::resource;
4066: use Scalar::Util qw(weaken);
4067: use Apache::lonnet;
4068:
4069: =pod
4070:
4071: =head1 Object: resource
4072:
4073: X<resource, navmap object>
4074: A resource object encapsulates a resource in a resource map, allowing
4075: easy manipulation of the resource, querying the properties of the
4076: resource (including user properties), and represents a reference that
4077: can be used as the canonical representation of the resource by
4078: lonnavmap clients like renderers.
4079:
4080: A resource only makes sense in the context of a navmap, as some of the
4081: data is stored in the navmap object.
4082:
4083: You will probably never need to instantiate this object directly. Use
4084: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
4085: starting resource.
4086:
4087: Resource objects respect the parameter_hiddenparts, which suppresses
4088: various parts according to the wishes of the map author. As of this
4089: writing, there is no way to override this parameter, and suppressed
4090: parts will never be returned, nor will their response types or ids be
4091: stored.
4092:
4093: =head2 Overview
4094:
4095: A B<Resource> is the most granular type of object in LON-CAPA that can
4096: be included in a course. It can either be a particular resource, like
4097: an HTML page, external resource, problem, etc., or it can be a
4098: container sequence, such as a "page" or a "map".
4099:
4100: To see a sequence from the user's point of view, please see the
4101: B<Creating a Course: Maps and Sequences> chapter of the Author's
4102: Manual.
4103:
4104: A Resource Object, once obtained from a navmap object via a B<getBy*>
4105: method of the navmap, or from an iterator, allows you to query
4106: information about that resource.
4107:
4108: Generally, you do not ever want to create a resource object yourself,
4109: so creation has been left undocumented. Always retrieve resources
4110: from navmap objects.
4111:
4112: =head3 Identifying Resources
4113:
4114: X<big hash>Every resource is identified by a Resource ID in the big hash that is
4115: unique to that resource for a given course. X<resource ID, in big hash>
4116: The Resource ID has the form #.#, where the first number is the same
4117: for every resource in a map, and the second is unique. For instance,
4118: for a course laid out like this:
4119:
4120: * Problem 1
4121: * Map
4122: * Resource 2
4123: * Resource 3
4124:
4125: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
4126: C<Resource 3> will share a first number. The second number may end up
4127: re-used between the two groups.
4128:
4129: The resource ID is only used in the big hash, but can be used in the
4130: context of a course to identify a resource easily. (For instance, the
4131: printing system uses it to record which resources from a sequence you
4132: wish to print.)
4133:
4134: X<symb> X<resource, symb>
4135: All resources also have B<symb>s, which uniquely identify a resource
4136: in a course. Many internal LON-CAPA functions expect a symb. A symb
4137: carries along with it the URL of the resource, and the map it appears
4138: in. Symbs are much larger than resource IDs.
4139:
4140: =cut
4141:
4142: sub new {
4143: # magic invocation to create a class instance
4144: my $proto = shift;
4145: my $class = ref($proto) || $proto;
4146: my $self = {};
4147:
4148: weaken($self->{NAV_MAP} = shift);
4149: $self->{ID} = shift;
4150:
4151: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
4152: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
4153:
4154: # Store this new resource in the parent nav map's cache.
4155: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
4156: $self->{RESOURCE_ERROR} = 0;
4157:
4158: $self->{DUEDATE_CACHE} = undef;
4159:
4160: # A hash that can be used by two-pass algorithms to store data
4161: # about this resource in. Not used by the resource object
4162: # directly.
4163: $self->{DATA} = {};
4164:
4165: bless($self);
4166:
4167: # This is a speed optimization, to avoid calling symb() too often.
4168: $self->{SYMB} = $self->symb();
4169:
4170: return $self;
4171: }
4172:
4173: # private function: simplify the NAV_HASH lookups we keep doing
4174: # pass the name, and to automatically append my ID, pass a true val on the
4175: # second param
4176: sub navHash {
4177: my $self = shift;
4178: my $param = shift;
4179: my $id = shift;
4180: my $arg = $param . ($id?$self->{ID}:"");
4181: if (ref($self) && ref($self->{NAV_MAP}) && defined($arg)) {
4182: return $self->{NAV_MAP}->navhash($arg);
4183: }
4184: return;
4185: }
4186:
4187: =pod
4188:
4189: =head2 Methods
4190:
4191: Once you have a resource object, here's what you can do with it:
4192:
4193: =head3 Attribute Retrieval
4194:
4195: Every resource has certain attributes that can be retrieved and used:
4196:
4197: =over 4
4198:
4199: =item * B<ID>: Every resource has an ID that is unique for that
4200: resource in the course it is in. The ID is actually in the hash
4201: representing the resource, so for a resource object $res, obtain
4202: it via C<$res->{ID}).
4203:
4204: =item * B<compTitle>:
4205:
4206: Returns a "composite title", that is equal to $res->title() if the
4207: resource has a title, and is otherwise the last part of the URL (e.g.,
4208: "problem.problem").
4209:
4210: =item * B<ext>:
4211:
4212: Returns true if the resource is external.
4213:
4214: =item * B<kind>:
4215:
4216: Returns the kind of the resource from the compiled nav map.
4217:
4218: =item * B<randomout>:
4219:
4220: Returns true if this resource was chosen to NOT be shown to the user
4221: by the random map selection feature. In other words, this is usually
4222: false.
4223:
4224: =item * B<randompick>:
4225:
4226: Returns the number of randomly picked items for a map if the randompick
4227: feature is being used on the map.
4228:
4229: =item * B<randomorder>:
4230:
4231: Returns true for a map if the randomorder feature is being used on the
4232: map.
4233:
4234: =item * B<src>:
4235:
4236: Returns the source for the resource.
4237:
4238: =item * B<symb>:
4239:
4240: Returns the symb for the resource.
4241:
4242: =item * B<title>:
4243:
4244: Returns the title of the resource.
4245:
4246: =back
4247:
4248: =cut
4249:
4250: # These info functions can be used directly, as they don't return
4251: # resource information.
4252: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
4253: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
4254: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
4255: sub from { my $self=shift; return $self->navHash("from_", 1); }
4256: # considered private and undocumented
4257: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
4258: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
4259: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
4260: sub randompick {
4261: my $self = shift;
4262: my $randompick = $self->parmval('randompick');
4263: return $randompick;
4264: }
4265: sub randomorder {
4266: my $self = shift;
4267: my $randomorder = $self->parmval('randomorder');
4268: return ($randomorder =~ /^yes$/i);
4269: }
4270: sub link {
4271: my $self=shift;
4272: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
4273: return $self->src;
4274: }
4275: sub src {
4276: my $self=shift;
4277: return $self->navHash("src_", 1);
4278: }
4279: sub shown_symb {
4280: my $self=shift;
4281: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->{SYMB});}
4282: return $self->{SYMB};
4283: }
4284: sub id {
4285: my $self=shift;
4286: return $self->{ID};
4287: }
4288: sub enclosing_map_src {
4289: my $self=shift;
4290: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4291: return $self->navHash('map_id_'.$first);
4292: }
4293: sub symb {
4294: my $self=shift;
4295: if (defined($self->{SYMB})) { return $self->{SYMB}; }
4296: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4297: my $symbSrc = &Apache::lonnet::declutter($self->src());
4298: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
4299: . '___' . $second . '___' . $symbSrc;
4300: return &Apache::lonnet::symbclean($symb);
4301: }
4302: sub wrap_symb {
4303: my $self = shift;
4304: return $self->{NAV_MAP}->wrap_symb($self->{SYMB});
4305: }
4306: sub title {
4307: my $self=shift;
4308: if ($self->{ID} eq '0.0') {
4309: # If this is the top-level map, return the title of the course
4310: # since this map can not be titled otherwise.
4311: return $env{'course.'.$env{'request.course.id'}.'.description'};
4312: }
4313: return $self->navHash("title_", 1); }
4314: # considered private and undocumented
4315: sub to { my $self=shift; return $self->navHash("to_", 1); }
4316: sub condition {
4317: my $self=shift;
4318: my $undercond=$self->navHash("undercond_", 1);
4319: if (!defined($undercond)) { return 1; };
4320: my $condid=$self->navHash("condid_$undercond");
4321: if (!defined($condid)) { return 1; };
4322: my $condition=&Apache::lonnet::directcondval($condid);
4323: return $condition;
4324: }
4325: sub condval {
4326: my $self=shift;
4327: my ($pathname,$filename) =
4328: &Apache::lonnet::split_uri_for_cond($self->src());
4329:
4330: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4331: /\&\Q$filename\E\:([\d\|]+)\&/);
4332: if ($match) {
4333: return &Apache::lonnet::condval($1);
4334: }
4335: return 0;
4336: }
4337: sub compTitle {
4338: my $self = shift;
4339: my $title = $self->title();
4340: $title=~s/\&colon\;/\:/gs;
4341: if (!$title) {
4342: $title = $self->src();
4343: $title = substr($title, rindex($title, '/') + 1);
4344: }
4345: return $title;
4346: }
4347:
4348: =pod
4349:
4350: B<Predicate Testing the Resource>
4351:
4352: These methods are shortcuts to deciding if a given resource has a given property.
4353:
4354: =over 4
4355:
4356: =item * B<is_map>:
4357:
4358: Returns true if the resource is a map type.
4359:
4360: =item * B<is_problem>:
4361:
4362: Returns true if the resource is a problem type, false
4363: otherwise. (Looks at the extension on the src field; might need more
4364: to work correctly.)
4365:
4366: =item * B<is_page>:
4367:
4368: Returns true if the resource is a page.
4369:
4370: =item * B<is_sequence>:
4371:
4372: Returns true if the resource is a sequence.
4373:
4374: =back
4375:
4376: =cut
4377:
4378: sub hasResource {
4379: my $self = shift;
4380: return $self->{NAV_MAP}->hasResource(@_);
4381: }
4382:
4383: sub retrieveResources {
4384: my $self = shift;
4385: return $self->{NAV_MAP}->retrieveResources(@_);
4386: }
4387:
4388: sub is_exam {
4389: my ($self,$part) = @_;
4390: my $type = $self->parmval('type',$part);
4391: if ($type eq 'exam') {
4392: return 1;
4393: }
4394: if ($self->src() =~ /\.(exam)$/) {
4395: return 1;
4396: }
4397: return 0;
4398: }
4399: sub is_html {
4400: my $self=shift;
4401: my $src = $self->src();
4402: return ($src =~ /html$/);
4403: }
4404: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
4405: sub is_page {
4406: my $self=shift;
4407: my $src = $self->src();
4408: return $self->navHash("is_map_", 1) &&
4409: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
4410: }
4411: sub is_practice {
4412: my $self=shift;
4413: my ($part) = @_;
4414: my $type = $self->parmval('type',$part);
4415: if ($type eq 'practice') {
4416: return 1;
4417: }
4418: return 0;
4419: }
4420: sub is_problem {
4421: my $self=shift;
4422: my $src = $self->src();
4423: if ($src =~ /$LONCAPA::assess_re/) {
4424: return !($self->is_practice());
4425: }
4426: return 0;
4427: }
4428: #
4429: # The has below is the set of status that are considered 'incomplete'
4430: #
4431: my %incomplete_hash =
4432: (
4433: TRIES_LEFT() => 1,
4434: OPEN() => 1,
4435: ATTEMPTED() => 1
4436:
4437: );
4438: #
4439: # Return tru if a problem is incomplete... for now incomplete means that
4440: # any part of the problem is incomplete.
4441: # Note that if the resources is not a problem, 0 is returned.
4442: #
4443: sub is_incomplete {
4444: my $self = shift;
4445: if ($self->is_problem()) {
4446: foreach my $part (@{$self->parts()}) {
4447: if (exists($incomplete_hash{$self->status($part)})) {
4448: return 1;
4449: }
4450: }
4451: }
4452: return 0;
4453:
4454: }
4455: sub is_raw_problem {
4456: my $self=shift;
4457: my $src = $self->src();
4458: if ($src =~ /$LONCAPA::assess_re/) {
4459: return 1;
4460: }
4461: return 0;
4462: }
4463:
4464: sub contains_problem {
4465: my $self=shift;
4466: if ($self->is_page()) {
4467: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
4468: return $hasProblem;
4469: }
4470: return 0;
4471: }
4472: sub map_contains_problem {
4473: my $self=shift;
4474: if ($self->is_map()) {
4475: my $has_problem=
4476: $self->hasResource($self,sub { $_[0]->is_problem() },1);
4477: return $has_problem;
4478: }
4479: return 0;
4480: }
4481: sub is_sequence {
4482: my $self=shift;
4483: return $self->navHash("is_map_", 1) &&
4484: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
4485: }
4486: sub is_missing_map {
4487: my $self=shift;
4488: return $self->navHash("is_map_", 1) &&
4489: $self->navHash("map_type_" . $self->map_pc()) eq 'none';
4490: }
4491: sub is_survey {
4492: my $self = shift();
4493: my $part = shift();
4494: my $type = $self->parmval('type',$part);
4495: if (($type eq 'survey') || ($type eq 'surveycred')) {
4496: return 1;
4497: }
4498: if ($self->src() =~ /\.(survey)$/) {
4499: return 1;
4500: }
4501: return 0;
4502: }
4503: sub is_anonsurvey {
4504: my $self = shift();
4505: my $part = shift();
4506: my $type = $self->parmval('type',$part);
4507: if (($type eq 'anonsurvey') || ($type eq 'anonsurveycred')) {
4508: return 1;
4509: }
4510: return 0;
4511: }
4512: sub is_task {
4513: my $self=shift;
4514: my $src = $self->src();
4515: return ($src =~ /\.(task)$/)
4516: }
4517:
4518: sub is_empty_sequence {
4519: my $self=shift;
4520: my $src = $self->src();
4521: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
4522: }
4523:
4524: # Private method: Shells out to the parmval in the nav map, handler parts.
4525: sub parmval {
4526: my $self = shift;
4527: my $what = shift;
4528: my $part = shift;
4529: if (!defined($part)) {
4530: $part = '0';
4531: }
4532: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->{SYMB});
4533: }
4534:
4535: =pod
4536:
4537: B<Map Methods>
4538:
4539: These methods are useful for getting information about the map
4540: properties of the resource, if the resource is a map (B<is_map>).
4541:
4542: =over 4
4543:
4544: =item * B<map_finish>:
4545:
4546: Returns a reference to a resource object corresponding to the finish
4547: resource of the map.
4548:
4549: =item * B<map_pc>:
4550:
4551: Returns the pc value of the map, which is the first number that
4552: appears in the resource ID of the resources in the map, and is the
4553: number that appears around the middle of the symbs of the resources in
4554: that map.
4555:
4556: =item * B<map_start>:
4557:
4558: Returns a reference to a resource object corresponding to the start
4559: resource of the map.
4560:
4561: =item * B<map_type>:
4562:
4563: Returns a string with the type of the map in it.
4564:
4565: =item * B<map_hierarchy>:
4566:
4567: Returns a string with a comma-separated ordered list of map_pc IDs
4568: for the hierarchy of maps containing a map, with the top level
4569: map first, then descending to deeper levels, with the enclosing map last.
4570:
4571: =item * B<map_breadcrumbs>:
4572:
4573: Same as map_hierarchy, except maps containing only a single itemm if
4574: it's a map, or containing no items are omitted, unless it's the top
4575: level map (map_pc = 1), which is always included.
4576:
4577: =back
4578:
4579: =cut
4580:
4581: sub map_finish {
4582: my $self = shift;
4583: my $src = $self->src();
4584: $src = &Apache::lonnet::clutter($src);
4585: my $res = $self->navHash("map_finish_$src", 0);
4586: $res = $self->{NAV_MAP}->getById($res);
4587: return $res;
4588: }
4589: sub map_pc {
4590: my $self = shift;
4591: my $src = $self->src();
4592: return $self->navHash("map_pc_$src", 0);
4593: }
4594: sub map_start {
4595: my $self = shift;
4596: my $src = $self->src();
4597: $src = &Apache::lonnet::clutter($src);
4598: my $res = $self->navHash("map_start_$src", 0);
4599: $res = $self->{NAV_MAP}->getById($res);
4600: return $res;
4601: }
4602: sub map_type {
4603: my $self = shift;
4604: my $pc = $self->map_pc();
4605: return $self->navHash("map_type_$pc", 0);
4606: }
4607: sub map_hierarchy {
4608: my $self = shift;
4609: my $pc = $self->map_pc();
4610: return $self->navHash("map_hierarchy_$pc", 0);
4611: }
4612: sub map_breadcrumbs {
4613: my $self = shift;
4614: my $pc = $self->map_pc();
4615: return $self->navHash("map_breadcrumbs_$pc", 0);
4616: }
4617:
4618: #####
4619: # Property queries
4620: #####
4621:
4622: # These functions will be responsible for returning the CORRECT
4623: # VALUE for the parameter, no matter what. So while they may look
4624: # like direct calls to parmval, they can be more than that.
4625: # So, for instance, the duedate function should use the "duedatetype"
4626: # information, rather than the resource object user.
4627:
4628: =pod
4629:
4630: =head2 Resource Parameters
4631:
4632: In order to use the resource parameters correctly, the nav map must
4633: have been instantiated with genCourseAndUserOptions set to true, so
4634: the courseopt and useropt is read correctly. Then, you can call these
4635: functions to get the relevant parameters for the resource. Each
4636: function defaults to part "0", but can be directed to another part by
4637: passing the part as the parameter.
4638:
4639: These methods are responsible for getting the parameter correct, not
4640: merely reflecting the contents of the GDBM hashes. As we move towards
4641: dates relative to other dates, these methods should be updated to
4642: reflect that. (Then, anybody using these methods will not have to update
4643: their code.)
4644:
4645: =over 4
4646:
4647:
4648: =item * B<printable>
4649:
4650: returns true if the current date is such that the
4651: specified resource part is printable.
4652:
4653:
4654: =item * B<resprintable>
4655:
4656: Returns true if all parts in the resource are printable making the
4657: entire resource printable.
4658:
4659: =item * B<acc>
4660:
4661: Get the Client IP/Name Access Control information.
4662:
4663: =item * B<answerdate>:
4664:
4665: Get the answer-reveal date for the problem.
4666:
4667: =item * B<awarded>:
4668:
4669: Gets the awarded value for the problem part. Requires genUserData set to
4670: true when the navmap object was created.
4671:
4672: =item * B<duedate>:
4673:
4674: Get the due date for the problem.
4675:
4676: =item * B<tries>:
4677:
4678: Get the number of tries the student has used on the problem.
4679:
4680: =item * B<maxtries>:
4681:
4682: Get the number of max tries allowed.
4683:
4684: =item * B<opendate>:
4685:
4686: Get the open date for the problem.
4687:
4688: =item * B<sig>:
4689:
4690: Get the significant figures setting.
4691:
4692: =item * B<tol>:
4693:
4694: Get the tolerance for the problem.
4695:
4696: =item * B<tries>:
4697:
4698: Get the number of tries the user has already used on the problem.
4699:
4700: =item * B<type>:
4701:
4702: Get the question type for the problem.
4703:
4704: =item * B<weight>:
4705:
4706: Get the weight for the problem.
4707:
4708: =back
4709:
4710: =cut
4711:
4712:
4713:
4714:
4715: sub printable {
4716:
4717: my ($self, $part) = @_;
4718:
4719: # The following cases apply:
4720: # - If a start date is not set, it is replaced by the open date.
4721: # - Ditto for start/open replaced by content open.
4722: # - If neither start nor printdates are set the part is printable.
4723: # - Start date set but no end date: Printable if now >= start date.
4724: # - End date set but no start date: Printable if now <= end date.
4725: # - both defined: printable if start <= now <= end
4726: #
4727:
4728: # Get the print open/close dates for the resource.
4729:
4730: my $start = $self->parmval("printstartdate", $part);
4731: my $end = $self->parmval("printenddate", $part);
4732:
4733: if (!$start) {
4734: $start = $self->parmval("opendate", $part);
4735: }
4736: if (!$start) {
4737: $start = $self->parmval("contentopen", $part);
4738: }
4739:
4740:
4741: my $now = time();
4742:
4743:
4744: my $startok = 1;
4745: my $endok = 1;
4746:
4747: if ((defined $start) && ($start ne '')) {
4748: $startok = $start <= $now;
4749: }
4750: if ((defined $end) && ($end != '')) {
4751: $endok = $end >= $now;
4752: }
4753: return $startok && $endok;
4754: }
4755:
4756: sub resprintable {
4757: my $self = shift;
4758:
4759: # get parts...or realize there are no parts.
4760:
4761: my $partsref = $self->parts();
4762: my @parts = @$partsref;
4763:
4764: if (!@parts) {
4765: return $self->printable(0);
4766: } else {
4767: foreach my $part (@parts) {
4768: if (!$self->printable($part)) {
4769: return 0;
4770: }
4771: }
4772: return 1;
4773: }
4774: }
4775:
4776: sub acc {
4777: (my $self, my $part) = @_;
4778: my $acc = $self->parmval("acc", $part);
4779: return $acc;
4780: }
4781: sub answerdate {
4782: (my $self, my $part) = @_;
4783: # Handle intervals
4784: my $answerdatetype = $self->parmval("answerdate.type", $part);
4785: my $answerdate = $self->parmval("answerdate", $part);
4786: my $duedate = $self->parmval("duedate", $part);
4787: if ($answerdatetype eq 'date_interval') {
4788: $answerdate = $duedate + $answerdate;
4789: }
4790: return $answerdate;
4791: }
4792: sub awarded {
4793: my $self = shift; my $part = shift;
4794: $self->{NAV_MAP}->get_user_data();
4795: if (!defined($part)) { $part = '0'; }
4796: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.awarded'};
4797: }
4798: sub taskversion {
4799: my $self = shift; my $part = shift;
4800: $self->{NAV_MAP}->get_user_data();
4801: if (!defined($part)) { $part = '0'; }
4802: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.version'};
4803: }
4804: sub taskstatus {
4805: my $self = shift; my $part = shift;
4806: $self->{NAV_MAP}->get_user_data();
4807: if (!defined($part)) { $part = '0'; }
4808: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$self->taskversion($part).'.'.$part.'.status'};
4809: }
4810: sub solved {
4811: my $self = shift; my $part = shift;
4812: $self->{NAV_MAP}->get_user_data();
4813: if (!defined($part)) { $part = '0'; }
4814: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.solved'};
4815: }
4816: sub checkedin {
4817: my $self = shift; my $part = shift;
4818: $self->{NAV_MAP}->get_user_data();
4819: if (!defined($part)) { $part = '0'; }
4820: if ($self->is_task()) {
4821: my $version = $self->taskversion($part);
4822: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin.slot'});
4823: } else {
4824: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin.slot'});
4825: }
4826: }
4827: # this should work exactly like the copy in lonhomework.pm
4828: # Why is there a copy in lonhomework? Why not centralized?
4829: #
4830: # TODO: Centralize duedate.
4831: #
4832:
4833: sub duedate {
4834: (my $self, my $part) = @_;
4835: if (defined ($self->{DUEDATE_CACHE}->{$part})) {
4836: return $self->{DUEDATE_CACHE}->{$part};
4837: }
4838: my $date;
4839: my @interval=$self->parmval("interval", $part);
4840: my $due_date=$self->parmval("duedate", $part);
4841: if ($interval[0] =~ /\d+/) {
4842: my $first_access=&Apache::lonnet::get_first_access($interval[1],
4843: $self->{SYMB});
4844: if (defined($first_access)) {
4845: my $interval = $first_access+$interval[0];
4846: $date = (!$due_date || $interval < $due_date) ? $interval
4847: : $due_date;
4848: } else {
4849: $date = $due_date;
4850: }
4851: } else {
4852: $date = $due_date;
4853: }
4854: $self->{DUEDATE_CACHE}->{$part} = $date;
4855: return $date;
4856: }
4857: sub handgrade {
4858: (my $self, my $part) = @_;
4859: my @response_ids = $self->responseIds($part);
4860: if (@response_ids) {
4861: foreach my $response_id (@response_ids) {
4862: my $handgrade = $self->parmval("handgrade",$part.'_'.$response_id);
4863: if (lc($handgrade) eq 'yes') {
4864: return 'yes';
4865: }
4866: }
4867: }
4868: my $handgrade = $self->parmval("handgrade", $part);
4869: return $handgrade;
4870: }
4871: sub maxtries {
4872: (my $self, my $part) = @_;
4873: my $maxtries = $self->parmval("maxtries", $part);
4874: return $maxtries;
4875: }
4876: sub opendate {
4877: (my $self, my $part) = @_;
4878: my $opendatetype = $self->parmval("opendate.type", $part);
4879: my $opendate = $self->parmval("opendate", $part);
4880: if ($opendatetype eq 'date_interval') {
4881: my $duedate = $self->duedate($part);
4882: $opendate = $duedate - $opendate;
4883: }
4884: return $opendate;
4885: }
4886: sub problemstatus {
4887: (my $self, my $part) = @_;
4888: my $problemstatus = $self->parmval("problemstatus", $part);
4889: return lc($problemstatus);
4890: }
4891: sub sig {
4892: (my $self, my $part) = @_;
4893: my $sig = $self->parmval("sig", $part);
4894: return $sig;
4895: }
4896: sub tol {
4897: (my $self, my $part) = @_;
4898: my $tol = $self->parmval("tol", $part);
4899: return $tol;
4900: }
4901: sub tries {
4902: my $self = shift;
4903: my $tries = $self->queryRestoreHash('tries', shift);
4904: if (!defined($tries)) { return '0';}
4905: return $tries;
4906: }
4907: sub type {
4908: (my $self, my $part) = @_;
4909: my $type = $self->parmval("type", $part);
4910: return $type;
4911: }
4912: sub weight {
4913: my $self = shift; my $part = shift;
4914: if (!defined($part)) { $part = '0'; }
4915: my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
4916: $self->{SYMB}, $self->{DOMAIN},
4917: $self->{USERNAME},
4918: $env{'request.course.sec'});
4919: return $weight;
4920: }
4921: sub part_display {
4922: my $self= shift(); my $partID = shift();
4923: if (! defined($partID)) { $partID = '0'; }
4924: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
4925: $self->{SYMB});
4926: if (! defined($display) || $display eq '') {
4927: $display = $partID;
4928: }
4929: return $display;
4930: }
4931: sub slot_control {
4932: my $self=shift(); my $part = shift();
4933: if (!defined($part)) { $part = '0'; }
4934: my $useslots = $self->parmval("useslots", $part);
4935: my $availablestudent = $self->parmval("availablestudent", $part);
4936: my $available = $self->parmval("available", $part);
4937: return ($useslots,$availablestudent,$available);
4938: }
4939:
4940: # Multiple things need this
4941: sub getReturnHash {
4942: my $self = shift;
4943:
4944: if (!defined($self->{RETURN_HASH})) {
4945: my %tmpHash = &Apache::lonnet::restore($self->{SYMB},undef,$self->{DOMAIN},$self->{USERNAME});
4946: $self->{RETURN_HASH} = \%tmpHash;
4947: }
4948: }
4949:
4950: ######
4951: # Status queries
4952: ######
4953:
4954: # These methods query the status of problems.
4955:
4956: # If we need to count parts, this function determines the number of
4957: # parts from the metadata. When called, it returns a reference to a list
4958: # of strings corresponding to the parts. (Thus, using it in a scalar context
4959: # tells you how many parts you have in the problem:
4960: # $partcount = scalar($resource->countParts());
4961: # Don't use $self->{PARTS} directly because you don't know if it's been
4962: # computed yet.
4963:
4964: =pod
4965:
4966: =head2 Resource misc
4967:
4968: Misc. functions for the resource.
4969:
4970: =over 4
4971:
4972: =item * B<hasDiscussion>:
4973:
4974: Returns a false value if there has been discussion since the user last
4975: logged in, true if there has. Always returns false if the discussion
4976: data was not extracted when the nav map was constructed.
4977:
4978: =item * B<last_post_time>:
4979:
4980: Returns a false value if there hasn't been discussion otherwise returns
4981: unix timestamp of last time a discussion posting (or edit) was made.
4982:
4983: =item * B<discussion_info>:
4984:
4985: optional argument is a filter (currently can be 'unread');
4986: returns in scalar context the count of the number of discussion postings.
4987:
4988: returns in list context both the count of postings and a hash ref
4989: containing information about the postings (subject, id, timestamp) in a hash.
4990:
4991: 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.
4992:
4993: =item * B<getFeedback>:
4994:
4995: Gets the feedback for the resource and returns the raw feedback string
4996: for the resource, or the null string if there is no feedback or the
4997: email data was not extracted when the nav map was constructed. Usually
4998: used like this:
4999:
5000: for my $url (split(/\,/, $res->getFeedback())) {
5001: my $link = &escape($url);
5002: ...
5003:
5004: and use the link as appropriate.
5005:
5006: =cut
5007:
5008: sub hasDiscussion {
5009: my $self = shift;
5010: return $self->{NAV_MAP}->hasDiscussion($self->{SYMB});
5011: }
5012:
5013: sub last_post_time {
5014: my $self = shift;
5015: return $self->{NAV_MAP}->last_post_time($self->{SYMB});
5016: }
5017:
5018: sub discussion_info {
5019: my ($self,$filter) = @_;
5020: return $self->{NAV_MAP}->discussion_info($self->{SYMB},$filter);
5021: }
5022:
5023: sub getFeedback {
5024: my $self = shift;
5025: my $source = $self->src();
5026: my $symb = $self->{SYMB};
5027: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
5028: return $self->{NAV_MAP}->getFeedback($symb,$source);
5029: }
5030:
5031: sub getErrors {
5032: my $self = shift;
5033: my $source = $self->src();
5034: my $symb = $self->{SYMB};
5035: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
5036: return $self->{NAV_MAP}->getErrors($symb,$source);
5037: }
5038:
5039: =pod
5040:
5041: =item * B<parts>():
5042:
5043: Returns a list reference containing sorted strings corresponding to
5044: each part of the problem. Single part problems have only a part '0'.
5045: Multipart problems do not return their part '0', since they typically
5046: do not really matter.
5047:
5048: =item * B<countParts>():
5049:
5050: Returns the number of parts of the problem a student can answer. Thus,
5051: for single part problems, returns 1. For multipart, it returns the
5052: number of parts in the problem, not including psuedo-part 0.
5053:
5054: =item * B<countResponses>():
5055:
5056: Returns the total number of responses in the problem a student can answer.
5057:
5058: =item * B<responseTypes>():
5059:
5060: Returns a hash whose keys are the response types. The values are the number
5061: of times each response type is used. This is for the I<entire> problem, not
5062: just a single part.
5063:
5064: =item * B<multipart>():
5065:
5066: Returns true if the problem is multipart, false otherwise. Use this instead
5067: of countParts if all you want is multipart/not multipart.
5068:
5069: =item * B<responseType>($part):
5070:
5071: Returns the response type of the part, without the word "response" on the
5072: end. Example return values: 'string', 'essay', 'numeric', etc.
5073:
5074: =item * B<responseIds>($part):
5075:
5076: Retreives the response IDs for the given part as an array reference containing
5077: strings naming the response IDs. This may be empty.
5078:
5079: =back
5080:
5081: =cut
5082:
5083: sub parts {
5084: my $self = shift;
5085:
5086: if ($self->ext) { return []; }
5087:
5088: $self->extractParts();
5089: return $self->{PARTS};
5090: }
5091:
5092: sub countParts {
5093: my $self = shift;
5094:
5095: my $parts = $self->parts();
5096:
5097: # If I left this here, then it's not necessary.
5098: #my $delta = 0;
5099: #for my $part (@$parts) {
5100: # if ($part eq '0') { $delta--; }
5101: #}
5102:
5103: if ($self->{RESOURCE_ERROR}) {
5104: return 0;
5105: }
5106:
5107: return scalar(@{$parts}); # + $delta;
5108: }
5109:
5110: sub countResponses {
5111: my $self = shift;
5112: my $count;
5113: foreach my $part (@{$self->parts()}) {
5114: $count+= scalar($self->responseIds($part));
5115: }
5116: return $count;
5117: }
5118:
5119: sub responseTypes {
5120: my $self = shift;
5121: my %responses;
5122: foreach my $part (@{$self->parts()}) {
5123: foreach my $responsetype ($self->responseType($part)) {
5124: $responses{$responsetype}++ if (defined($responsetype));
5125: }
5126: }
5127: return %responses;
5128: }
5129:
5130: sub multipart {
5131: my $self = shift;
5132: return $self->countParts() > 1;
5133: }
5134:
5135: sub singlepart {
5136: my $self = shift;
5137: return $self->countParts() == 1;
5138: }
5139:
5140: sub responseType {
5141: my $self = shift;
5142: my $part = shift;
5143:
5144: $self->extractParts();
5145: if (defined($self->{RESPONSE_TYPES}->{$part})) {
5146: return @{$self->{RESPONSE_TYPES}->{$part}};
5147: } else {
5148: return undef;
5149: }
5150: }
5151:
5152: sub responseIds {
5153: my $self = shift;
5154: my $part = shift;
5155:
5156: $self->extractParts();
5157: if (defined($self->{RESPONSE_IDS}->{$part})) {
5158: return @{$self->{RESPONSE_IDS}->{$part}};
5159: } else {
5160: return undef;
5161: }
5162: }
5163:
5164: # Private function: Extracts the parts information, both part names and
5165: # part types, and saves it.
5166: sub extractParts {
5167: my $self = shift;
5168:
5169: return if (defined($self->{PARTS}));
5170: return if ($self->ext);
5171:
5172: $self->{PARTS} = [];
5173:
5174: my %parts;
5175:
5176: # Retrieve part count, if this is a problem
5177: if ($self->is_problem()) {
5178: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
5179: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
5180:
5181: if ($partorder) {
5182: my @parts;
5183: for my $part (split (/,/,$partorder)) {
5184: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
5185: push @parts, $part;
5186: $parts{$part} = 1;
5187: }
5188: }
5189: $self->{PARTS} = \@parts;
5190: } else {
5191: if (!$metadata) {
5192: $self->{RESOURCE_ERROR} = 1;
5193: $self->{PARTS} = [];
5194: $self->{PART_TYPE} = {};
5195: return;
5196: }
5197: foreach my $entry (split(/\,/,$metadata)) {
5198: if ($entry =~ /^(?:part|Task)_(.*)$/) {
5199: my $part = $1;
5200: # This floods the logs if it blows up
5201: if (defined($parts{$part})) {
5202: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->{SYMB});
5203: }
5204:
5205: # check to see if part is turned off.
5206:
5207: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
5208: $parts{$part} = 1;
5209: }
5210: }
5211: }
5212: my @sortedParts = sort(keys(%parts));
5213: $self->{PARTS} = \@sortedParts;
5214: }
5215:
5216:
5217: # These hashes probably do not need names that end with "Hash"....
5218: my %responseIdHash;
5219: my %responseTypeHash;
5220:
5221:
5222: # Init the responseIdHash
5223: foreach my $part (@{$self->{PARTS}}) {
5224: $responseIdHash{$part} = [];
5225: }
5226:
5227: # Now, the unfortunate thing about this is that parts, part name, and
5228: # response id are delimited by underscores, but both the part
5229: # name and response id can themselves have underscores in them.
5230: # So we have to use our knowlege of part names to figure out
5231: # where the part names begin and end, and even then, it is possible
5232: # to construct ambiguous situations.
5233: foreach my $data (split(/,/, $metadata)) {
5234: if ($data =~ /^([a-zA-Z]+)response_(.*)/
5235: || $data =~ /^(Task)_(.*)/) {
5236: my $responseType = $1;
5237: my $partStuff = $2;
5238: my $partIdSoFar = '';
5239: my @partChunks = split(/_/, $partStuff);
5240: my $i = 0;
5241: for ($i = 0; $i < scalar(@partChunks); $i++) {
5242: if ($partIdSoFar) { $partIdSoFar .= '_'; }
5243: $partIdSoFar .= $partChunks[$i];
5244: if ($parts{$partIdSoFar}) {
5245: my @otherChunks = @partChunks[$i+1..$#partChunks];
5246: my $responseId = join('_', @otherChunks);
5247: if ($self->is_task()) {
5248: push(@{$responseIdHash{$partIdSoFar}},
5249: $partIdSoFar);
5250: } else {
5251: push(@{$responseIdHash{$partIdSoFar}},
5252: $responseId);
5253: }
5254: push(@{$responseTypeHash{$partIdSoFar}},
5255: $responseType);
5256: }
5257: }
5258: }
5259: }
5260: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
5261: #
5262: # Reorder the arrays in the %responseIdHash and %responseTypeHash
5263: if ($resorder) {
5264: my @resorder=split(/,/,$resorder);
5265: foreach my $part (keys(%responseIdHash)) {
5266: my $i=0;
5267: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
5268: my @neworder;
5269: foreach my $possibleid (@resorder) {
5270: if (exists($resids{$possibleid})) {
5271: push(@neworder,$resids{$possibleid});
5272: }
5273: }
5274: my @ids;
5275: my @type;
5276: foreach my $element (@neworder) {
5277: push (@ids,$responseIdHash{$part}->[$element]);
5278: push (@type,$responseTypeHash{$part}->[$element]);
5279: }
5280: $responseIdHash{$part}=\@ids;
5281: $responseTypeHash{$part}=\@type;
5282: }
5283: }
5284: $self->{RESPONSE_IDS} = \%responseIdHash;
5285: $self->{RESPONSE_TYPES} = \%responseTypeHash;
5286: }
5287:
5288: return;
5289: }
5290:
5291: =pod
5292:
5293: =head2 Resource Status
5294:
5295: Problem resources have status information, reflecting their various
5296: dates and completion statuses.
5297:
5298: There are two aspects to the status: the date-related information and
5299: the completion information.
5300:
5301: Idiomatic usage of these two methods would probably look something
5302: like
5303:
5304: foreach my $part ($resource->parts()) {
5305: my $dateStatus = $resource->getDateStatus($part);
5306: my $completionStatus = $resource->getCompletionStatus($part);
5307:
5308: or
5309:
5310: my $status = $resource->status($part);
5311:
5312: ... use it here ...
5313: }
5314:
5315: Which you use depends on exactly what you are looking for. The
5316: status() function has been optimized for the nav maps display and may
5317: not precisely match what you need elsewhere.
5318:
5319: The symbolic constants shown below can be accessed through the
5320: resource object: C<$res->OPEN>.
5321:
5322: =over 4
5323:
5324: =item * B<getDateStatus>($part):
5325:
5326: ($part defaults to 0). A convenience function that returns a symbolic
5327: constant telling you about the date status of the part. The possible
5328: return values are:
5329:
5330: =back
5331:
5332: B<Date Codes>
5333:
5334: =over 4
5335:
5336: =item * B<OPEN_LATER>:
5337:
5338: The problem will be opened later.
5339:
5340: =item * B<OPEN>:
5341:
5342: Open and not yet due.
5343:
5344: =item * B<PAST_DUE_ANSWER_LATER>:
5345:
5346: The due date has passed, but the answer date has not yet arrived.
5347:
5348: =item * B<PAST_DUE_NO_ANSWER>:
5349:
5350: The due date has passed and there is no answer opening date set.
5351:
5352: =item * B<ANSWER_OPEN>:
5353:
5354: The answer date is here.
5355:
5356: =item * B<NOTHING_SET>:
5357:
5358: No dates have been set for this problem at all.
5359:
5360: =item * B<PAST_DUE_ATMPT_ANS>:
5361:
5362: The due date has passed, feedback is suppressed, the problem was attempted, and the answer date has not yet arrived.
5363:
5364: =item * B<PAST_DUE_ATMPT_NOANS>:
5365:
5366: The due date has passed, feedback is suppressed, the problem was attempted, and there is no answer opening date set.
5367:
5368: =item * B<PAST_DUE_NO_ATMT_ANS>:
5369:
5370: The due date has passed, feedback is suppressed, the problem was not attempted, and the answer date has not yet arrived.
5371:
5372: =item * B<PAST_DUE_NO_ATMT_NOANS>:
5373:
5374: The due date has passed, feedback is suppressed, the problem was not attempted, and there is no answer opening date set.
5375:
5376: =item * B<NETWORK_FAILURE>:
5377:
5378: The information is unknown due to network failure.
5379:
5380: =back
5381:
5382: =cut
5383:
5384: # Apparently the compiler optimizes these into constants automatically
5385: sub OPEN_LATER { return 0; }
5386: sub OPEN { return 1; }
5387: sub PAST_DUE_NO_ANSWER { return 2; }
5388: sub PAST_DUE_ANSWER_LATER { return 3; }
5389: sub ANSWER_OPEN { return 4; }
5390: sub NOTHING_SET { return 5; }
5391: sub PAST_DUE_ATMPT_ANS { return 6; }
5392: sub PAST_DUE_ATMPT_NOANS { return 7; }
5393: sub PAST_DUE_NO_ATMT_ANS { return 8; }
5394: sub PAST_DUE_NO_ATMT_NOANS { return 9; }
5395: sub NETWORK_FAILURE { return 100; }
5396:
5397: # getDateStatus gets the date status for a given problem part.
5398: # Because answer date, due date, and open date are fully independent
5399: # (i.e., it is perfectly possible to *only* have an answer date),
5400: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
5401: # (past, future, none given). This function handles this with a decision
5402: # tree. Read the comments to follow the decision tree.
5403:
5404: sub getDateStatus {
5405: my $self = shift;
5406: my $part = shift;
5407: $part = "0" if (!defined($part));
5408:
5409: # Always return network failure if there was one.
5410: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5411:
5412: my $now = time();
5413:
5414: my $open = $self->opendate($part);
5415: my $due = $self->duedate($part);
5416: my $answer = $self->answerdate($part);
5417:
5418: if (!$open && !$due && !$answer) {
5419: # no data on the problem at all
5420: # should this be the same as "open later"? think multipart.
5421: return $self->NOTHING_SET;
5422: }
5423: if (!$open || $now < $open) {return $self->OPEN_LATER}
5424: if (!$due || $now < $due) {return $self->OPEN}
5425: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
5426: if ($answer) { return $self->ANSWER_OPEN; }
5427: return PAST_DUE_NO_ANSWER;
5428: }
5429:
5430: =pod
5431:
5432: B<>
5433:
5434: =over 4
5435:
5436: =item * B<getCompletionStatus>($part):
5437:
5438: ($part defaults to 0.) A convenience function that returns a symbolic
5439: constant telling you about the completion status of the part, with the
5440: following possible results:
5441:
5442: =back
5443:
5444: B<Completion Codes>
5445:
5446: =over 4
5447:
5448: =item * B<NOT_ATTEMPTED>:
5449:
5450: Has not been attempted at all.
5451:
5452: =item * B<INCORRECT>:
5453:
5454: Attempted, but wrong by student.
5455:
5456: =item * B<INCORRECT_BY_OVERRIDE>:
5457:
5458: Attempted, but wrong by instructor override.
5459:
5460: =item * B<CORRECT>:
5461:
5462: Correct or correct by instructor.
5463:
5464: =item * B<CORRECT_BY_OVERRIDE>:
5465:
5466: Correct by instructor override.
5467:
5468: =item * B<EXCUSED>:
5469:
5470: Excused. Not yet implemented.
5471:
5472: =item * B<NETWORK_FAILURE>:
5473:
5474: Information not available due to network failure.
5475:
5476: =item * B<ATTEMPTED>:
5477:
5478: Attempted, and not yet graded.
5479:
5480: =item * B<CREDIT_ATTEMPTED>:
5481:
5482: Attempted, and credit received for attempt (survey and anonymous survey only).
5483:
5484: =back
5485:
5486: =cut
5487:
5488: sub NOT_ATTEMPTED { return 10; }
5489: sub INCORRECT { return 11; }
5490: sub INCORRECT_BY_OVERRIDE { return 12; }
5491: sub CORRECT { return 13; }
5492: sub CORRECT_BY_OVERRIDE { return 14; }
5493: sub EXCUSED { return 15; }
5494: sub ATTEMPTED { return 16; }
5495: sub CREDIT_ATTEMPTED { return 17; }
5496:
5497: sub getCompletionStatus {
5498: my $self = shift;
5499: my $part = shift;
5500: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5501:
5502: my $status = $self->queryRestoreHash('solved', $part);
5503:
5504: # Left as separate if statements in case we ever do more with this
5505: if ($status eq 'correct_by_student') {return $self->CORRECT;}
5506: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
5507: if ($status eq 'correct_by_override') {
5508: return $self->CORRECT_BY_OVERRIDE;
5509: }
5510: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
5511: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
5512: if ($status eq 'excused') {return $self->EXCUSED; }
5513: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
5514: if ($status eq 'credit_attempted') {
5515: if ($self->is_anonsurvey($part) || $self->is_survey($part)) {
5516: return $self->CREDIT_ATTEMPTED;
5517: } else {
5518: return $self->ATTEMPTED;
5519: }
5520: }
5521: return $self->NOT_ATTEMPTED;
5522: }
5523:
5524: sub queryRestoreHash {
5525: my $self = shift;
5526: my $hashentry = shift;
5527: my $part = shift;
5528: $part = "0" if (!defined($part) || $part eq '');
5529: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5530:
5531: $self->getReturnHash();
5532:
5533: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
5534: }
5535:
5536: =pod
5537:
5538: B<Composite Status>
5539:
5540: Along with directly returning the date or completion status, the
5541: resource object includes a convenience function B<status>() that will
5542: combine the two status tidbits into one composite status that can
5543: represent the status of the resource as a whole. This method represents
5544: the concept of the thing we want to display to the user on the nav maps
5545: screen, which is a combination of completion and open status. The precise logic is
5546: documented in the comments of the status method. The following results
5547: may be returned, all available as methods on the resource object
5548: ($res->NETWORK_FAILURE): In addition to the return values that match
5549: the date or completion status, this function can return "ANSWER_SUBMITTED"
5550: if that problemstatus parameter value is set to No, suppressing the
5551: incorrect/correct feedback.
5552:
5553: =over 4
5554:
5555: =item * B<NETWORK_FAILURE>:
5556:
5557: The network has failed and the information is not available.
5558:
5559: =item * B<NOTHING_SET>:
5560:
5561: No dates have been set for this problem (part) at all. (Because only
5562: certain parts of a multi-part problem may be assigned, this can not be
5563: collapsed into "open later", as we do not know a given part will EVER
5564: be opened. For single part, this is the same as "OPEN_LATER".)
5565:
5566: =item * B<CORRECT>:
5567:
5568: For any reason at all, the part is considered correct.
5569:
5570: =item * B<EXCUSED>:
5571:
5572: For any reason at all, the problem is excused.
5573:
5574: =item * B<PAST_DUE_NO_ANSWER>:
5575:
5576: The problem is past due, not considered correct, and no answer date is
5577: set.
5578:
5579: =item * B<PAST_DUE_ANSWER_LATER>:
5580:
5581: The problem is past due, not considered correct, and an answer date in
5582: the future is set.
5583:
5584: =item * B<PAST_DUE_ATMPT_ANS>:
5585:
5586: The problem is past due, feedback is suppressed, the problem was
5587: attempted and an answer date in the future is set.
5588:
5589: =item * B<PAST_DUE_ATMPT_NOANS>:
5590:
5591: The problem is past due, feedback is suppressed, the problem was
5592: attempted and no answer date is set.
5593:
5594: =item * B<PAST_DUE_NO_ATMT_ANS>:
5595:
5596: The problem is past due, feedback is suppressed, the problem was
5597: not attempted and an answer date in the future is set.
5598:
5599: =item * B<PAST_DUE_NO_ATMT_NOANS>:
5600:
5601: The problem is past due, feedback is suppressed, the problem was
5602: not attempted and no answer date is set.
5603:
5604: =item * B<ANSWER_OPEN>:
5605:
5606: The problem is past due, not correct, and the answer is now available.
5607:
5608: =item * B<OPEN_LATER>:
5609:
5610: The problem is not yet open.
5611:
5612: =item * B<TRIES_LEFT>:
5613:
5614: The problem is open, has been tried, is not correct, but there are
5615: tries left.
5616:
5617: =item * B<INCORRECT>:
5618:
5619: The problem is open, and all tries have been used without getting the
5620: correct answer.
5621:
5622: =item * B<OPEN>:
5623:
5624: The item is open and not yet tried.
5625:
5626: =item * B<ATTEMPTED>:
5627:
5628: The problem has been attempted.
5629:
5630: =item * B<CREDIT_ATTEMPTED>:
5631:
5632: The problem has been attempted, and credit given for the attempt (survey and anonymous survey only).
5633:
5634: =item * B<ANSWER_SUBMITTED>:
5635:
5636: An answer has been submitted, but the student should not see it.
5637:
5638: =back
5639:
5640: =cut
5641:
5642: sub TRIES_LEFT { return 20; }
5643: sub ANSWER_SUBMITTED { return 21; }
5644: sub PARTIALLY_CORRECT { return 22; }
5645:
5646: sub RESERVED_LATER { return 30; }
5647: sub RESERVED { return 31; }
5648: sub RESERVED_LOCATION { return 32; }
5649: sub RESERVABLE { return 33; }
5650: sub RESERVABLE_LATER { return 34; }
5651: sub NOTRESERVABLE { return 35; }
5652: sub NOT_IN_A_SLOT { return 36; }
5653: sub NEEDS_CHECKIN { return 37; }
5654: sub WAITING_FOR_GRADE { return 38; }
5655: sub UNKNOWN { return 39; }
5656:
5657: sub status {
5658: my $self = shift;
5659: my $part = shift;
5660: if (!defined($part)) { $part = "0"; }
5661: my $completionStatus = $self->getCompletionStatus($part);
5662: my $dateStatus = $self->getDateStatus($part);
5663:
5664: # What we have is a two-dimensional matrix with 4 entries on one
5665: # dimension and 5 entries on the other, which we want to colorize,
5666: # plus network failure and "no date data at all".
5667:
5668: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
5669: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
5670:
5671: my $suppressFeedback = 0;
5672: if (($self->problemstatus($part) eq 'no') ||
5673: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5674: $suppressFeedback = 1;
5675: }
5676: # If there's an answer date and we're past it, don't
5677: # suppress the feedback; student should know
5678: if ($self->duedate($part) && $self->duedate($part) < time() &&
5679: $self->answerdate($part) && $self->answerdate($part) < time()) {
5680: $suppressFeedback = 0;
5681: }
5682:
5683: # There are a few whole rows we can dispose of:
5684: if ($completionStatus == CORRECT ||
5685: $completionStatus == CORRECT_BY_OVERRIDE ) {
5686: if ( $suppressFeedback ) {
5687: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
5688: $dateStatus == PAST_DUE_NO_ANSWER ) {
5689: if ($dateStatus == PAST_DUE_ANSWER_LATER) {
5690: return PAST_DUE_ATMPT_ANS;
5691: } else {
5692: return PAST_DUE_ATMPT_NOANS;
5693: }
5694: } else {
5695: return ANSWER_SUBMITTED;
5696: }
5697: }
5698: my $awarded=$self->awarded($part);
5699: if ($awarded < 1 && $awarded > 0) {
5700: return PARTIALLY_CORRECT;
5701: } elsif ($awarded<1) {
5702: return INCORRECT;
5703: }
5704: return CORRECT;
5705: }
5706:
5707: # If it's WRONG... and not open
5708: if ( ($completionStatus == INCORRECT ||
5709: $completionStatus == INCORRECT_BY_OVERRIDE)
5710: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
5711: return INCORRECT;
5712: }
5713:
5714: if ($completionStatus == ATTEMPTED) {
5715: return ATTEMPTED;
5716: }
5717:
5718: if ($completionStatus == CREDIT_ATTEMPTED) {
5719: return CREDIT_ATTEMPTED;
5720: }
5721:
5722: # If it's EXCUSED, then return that no matter what
5723: if ($completionStatus == EXCUSED) {
5724: return EXCUSED;
5725: }
5726:
5727: if ($dateStatus == NOTHING_SET) {
5728: return NOTHING_SET;
5729: }
5730:
5731: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
5732: # by 4 matrix (date statuses).
5733:
5734: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
5735: $dateStatus == PAST_DUE_NO_ANSWER ) {
5736: if ($suppressFeedback) {
5737: if ($completionStatus == NOT_ATTEMPTED) {
5738: if ($dateStatus == PAST_DUE_ANSWER_LATER) {
5739: return PAST_DUE_NO_ATMT_ANS;
5740: } else {
5741: return PAST_DUE_NO_ATMT_NOANS;
5742: }
5743: } else {
5744: if ($dateStatus == PAST_DUE_ANSWER_LATER) {
5745: return PAST_DUE_ATMPT_ANS;
5746: } else {
5747: return PAST_DUE_ATMPT_NOANS;
5748: }
5749: }
5750: } else {
5751: return $dateStatus;
5752: }
5753: }
5754:
5755: if ($dateStatus == ANSWER_OPEN) {
5756: return ANSWER_OPEN;
5757: }
5758:
5759: # Now: (incorrect, incorrect_override, not_attempted) x
5760: # (open_later), (open)
5761:
5762: if ($dateStatus == OPEN_LATER) {
5763: return OPEN_LATER;
5764: }
5765:
5766: # If it's WRONG...
5767: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
5768: # and there are TRIES LEFT:
5769: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
5770: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
5771: }
5772: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
5773: }
5774:
5775: # Otherwise, it's untried and open
5776: return OPEN;
5777: }
5778:
5779: sub check_for_slot {
5780: my $self = shift;
5781: my $part = shift;
5782: my $symb = $self->{SYMB};
5783: my ($use_slots,$available,$availablestudent) = $self->slot_control($part);
5784: if (($use_slots ne '') && ($use_slots !~ /^\s*no\s*$/i)) {
5785: my @slots = (split(/:/,$availablestudent),split(/:/,$available));
5786: my $cid=$env{'request.course.id'};
5787: my $cdom=$env{'course.'.$cid.'.domain'};
5788: my $cnum=$env{'course.'.$cid.'.num'};
5789: my $now = time;
5790: my $num_usable_slots = 0;
5791: my ($checkedin,$checkedinslot,%consumed_uniq,%slots);
5792: if (@slots > 0) {
5793: %slots=&Apache::lonnet::get('slots',[@slots],$cdom,$cnum);
5794: if (&Apache::lonnet::error(%slots)) {
5795: return (UNKNOWN);
5796: }
5797: my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots,'starttime');
5798: foreach my $slot_name (@sorted_slots) {
5799: next if (!defined($slots{$slot_name}) || !ref($slots{$slot_name}));
5800: my $end = $slots{$slot_name}->{'endtime'};
5801: my $start = $slots{$slot_name}->{'starttime'};
5802: my $ip = $slots{$slot_name}->{'ip'};
5803: if ($self->simpleStatus() == OPEN) {
5804: if ($end > $now) {
5805: if ($start > $now) {
5806: return (RESERVED_LATER,$start,$slot_name);
5807: } else {
5808: if ($ip ne '') {
5809: if (!&Apache::loncommon::check_ip_acc($ip)) {
5810: return (RESERVED_LOCATION,$end,$slot_name);
5811: }
5812: }
5813: my @proctors;
5814: if ($slots{$slot_name}->{'proctor'} ne '') {
5815: @proctors = split(',',$slots{$slot_name}->{'proctor'});
5816: }
5817: if (@proctors > 0) {
5818: ($checkedin,$checkedinslot) = $self->checkedin();
5819: unless ((grep(/^\Q$checkedin\E/,@proctors)) &&
5820: ($checkedinslot eq $slot_name)) {
5821: return (NEEDS_CHECKIN,$end,$slot_name);
5822: }
5823: }
5824: return (RESERVED,$end,$slot_name);
5825: }
5826: }
5827: } elsif ($end > $now) {
5828: $num_usable_slots ++;
5829: }
5830: }
5831: my ($is_correct,$wait_for_grade);
5832: if ($self->is_task()) {
5833: my $taskstatus = $self->taskstatus();
5834: $is_correct = (($taskstatus eq 'pass') ||
5835: ($self->solved() =~ /^correct_/));
5836: unless ($taskstatus =~ /^(?:pass|fail)$/) {
5837: $wait_for_grade = 1;
5838: }
5839: } else {
5840: unless ($self->completable()) {
5841: $wait_for_grade = 1;
5842: }
5843: unless (($self->problemstatus($part) eq 'no') ||
5844: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5845: $is_correct = ($self->solved($part) =~ /^correct_/);
5846: $wait_for_grade = 0;
5847: }
5848: }
5849: ($checkedin,$checkedinslot) = $self->checkedin();
5850: if ($checkedin) {
5851: if (ref($slots{$checkedinslot}) eq 'HASH') {
5852: $consumed_uniq{$checkedinslot} = $slots{$checkedinslot}{'uniqueperiod'};
5853: }
5854: if ($wait_for_grade) {
5855: return (WAITING_FOR_GRADE);
5856: } elsif ($is_correct) {
5857: return (CORRECT);
5858: }
5859: }
5860: if ($num_usable_slots) {
5861: return(NOT_IN_A_SLOT);
5862: }
5863: }
5864: my $reservable = &Apache::lonnet::get_reservable_slots($cnum,$cdom,$env{'user.name'},
5865: $env{'user.domain'});
5866: if (ref($reservable) eq 'HASH') {
5867: if ((ref($reservable->{'now_order'}) eq 'ARRAY') && (ref($reservable->{'now'}) eq 'HASH')) {
5868: foreach my $slot (reverse (@{$reservable->{'now_order'}})) {
5869: my $canuse;
5870: if (($reservable->{'now'}{$slot}{'symb'} eq '') ||
5871: ($reservable->{'now'}{$slot}{'symb'} eq $symb)) {
5872: $canuse = 1;
5873: }
5874: if ($canuse) {
5875: if ($checkedin) {
5876: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5877: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5878: if ($reservable->{'now'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5879: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5880: next if (!
5881: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5882: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5883: }
5884: }
5885: }
5886: return(RESERVABLE,$reservable->{'now'}{$slot}{'endreserve'});
5887: }
5888: }
5889: }
5890: if ((ref($reservable->{'future_order'}) eq 'ARRAY') && (ref($reservable->{'future'}) eq 'HASH')) {
5891: foreach my $slot (@{$reservable->{'future_order'}}) {
5892: my $canuse;
5893: if (($reservable->{'future'}{$slot}{'symb'} eq '') ||
5894: ($reservable->{'future'}{$slot}{'symb'} eq $symb)) {
5895: $canuse = 1;
5896: }
5897: if ($canuse) {
5898: if ($checkedin) {
5899: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5900: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5901: if ($reservable->{'future'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5902: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5903: next if (!
5904: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5905: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5906: }
5907: }
5908: }
5909: return(RESERVABLE_LATER,$reservable->{'future'}{$slot}{'startreserve'});
5910: }
5911: }
5912: }
5913: }
5914: return(NOTRESERVABLE);
5915: }
5916: return;
5917: }
5918:
5919: sub CLOSED { return 23; }
5920: sub ERROR { return 24; }
5921:
5922: =pod
5923:
5924: B<Simple Status>
5925:
5926: Convenience method B<simpleStatus> provides a "simple status" for the resource.
5927: "Simple status" corresponds to "which icon is shown on the
5928: Navmaps". There are six "simple" statuses:
5929:
5930: =over 4
5931:
5932: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
5933:
5934: =item * B<OPEN>: The problem is open and unattempted.
5935:
5936: =item * B<CORRECT>: The problem is correct for any reason.
5937:
5938: =item * B<INCORRECT>: The problem is incorrect and can still be
5939: completed successfully.
5940:
5941: =item * B<ATTEMPTED>: The problem has been attempted, but the student
5942: does not know if they are correct. (The ellipsis icon.)
5943:
5944: =item * B<ERROR>: There is an error retrieving information about this
5945: problem.
5946:
5947: =back
5948:
5949: =cut
5950:
5951: # This hash maps the composite status to this simple status, and
5952: # can be used directly, if you like
5953: my %compositeToSimple =
5954: (
5955: NETWORK_FAILURE() => ERROR,
5956: NOTHING_SET() => CLOSED,
5957: CORRECT() => CORRECT,
5958: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
5959: EXCUSED() => CORRECT,
5960: PAST_DUE_NO_ANSWER() => INCORRECT,
5961: PAST_DUE_ANSWER_LATER() => INCORRECT,
5962: PAST_DUE_ATMPT_ANS() => ATTEMPTED,
5963: PAST_DUE_ATMPT_NOANS() => ATTEMPTED,
5964: PAST_DUE_NO_ATMT_ANS() => CLOSED,
5965: PAST_DUE_NO_ATMT_NOANS() => CLOSED,
5966: ANSWER_OPEN() => INCORRECT,
5967: OPEN_LATER() => CLOSED,
5968: TRIES_LEFT() => OPEN,
5969: INCORRECT() => INCORRECT,
5970: OPEN() => OPEN,
5971: ATTEMPTED() => ATTEMPTED,
5972: CREDIT_ATTEMPTED() => CORRECT,
5973: ANSWER_SUBMITTED() => ATTEMPTED
5974: );
5975:
5976: sub simpleStatus {
5977: my $self = shift;
5978: my $part = shift;
5979: my $status = $self->status($part);
5980: return $compositeToSimple{$status};
5981: }
5982:
5983: =pod
5984:
5985: B<simpleStatusCount> will return an array reference containing, in
5986: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
5987: and ERROR parts the given problem has.
5988:
5989: =cut
5990:
5991: # This maps the status to the slot we want to increment
5992: my %statusToSlotMap =
5993: (
5994: OPEN() => 0,
5995: CLOSED() => 1,
5996: CORRECT() => 2,
5997: INCORRECT() => 3,
5998: ATTEMPTED() => 4,
5999: ERROR() => 5
6000: );
6001:
6002: sub statusToSlot { return $statusToSlotMap{shift()}; }
6003:
6004: sub simpleStatusCount {
6005: my $self = shift;
6006:
6007: my @counts = (0, 0, 0, 0, 0, 0, 0);
6008: foreach my $part (@{$self->parts()}) {
6009: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
6010: }
6011:
6012: return \@counts;
6013: }
6014:
6015: =pod
6016:
6017: B<Completable>
6018:
6019: The completable method represents the concept of I<whether the student can
6020: currently do the problem>. If the student can do the problem, which means
6021: that it is open, there are tries left, and if the problem is manually graded
6022: or the grade is suppressed via problemstatus, the student has not tried it
6023: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
6024: either the student has tried it and there is no feedback, or that for
6025: some reason it is no longer completable (not open yet, successfully completed,
6026: out of tries, etc.). As an example, this is used as the filter for the
6027: "Uncompleted Homework" option for the nav maps.
6028:
6029: If this does not quite meet your needs, do not fiddle with it (unless you are
6030: fixing it to better match the student's conception of "completable" because
6031: it's broken somehow)... make a new method.
6032:
6033: =cut
6034:
6035: sub completable {
6036: my $self = shift;
6037: if (!$self->is_problem()) { return 0; }
6038: my $partCount = $self->countParts();
6039:
6040: foreach my $part (@{$self->parts()}) {
6041: if ($part eq '0' && $partCount != 1) { next; }
6042: my $status = $self->status($part);
6043: # "If any of the parts are open, or have tries left (implies open),
6044: # and it is not "attempted" (manually graded problem), it is
6045: # not "complete"
6046: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
6047: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
6048: $status == ANSWER_SUBMITTED() ) {
6049: # did this part already, as well as we can
6050: next;
6051: }
6052: if ($status == OPEN() || $status == TRIES_LEFT()) {
6053: return 1;
6054: }
6055: }
6056:
6057: # If all the parts were complete, so was this problem.
6058: return 0;
6059: }
6060:
6061: =pod
6062:
6063: B<Answerable>
6064:
6065: The answerable method differs from the completable method in its handling of problem parts
6066: for which feedback on correctness is suppressed, but the student still has tries left, and
6067: the problem part is not past due, (i.e., the student could submit a different answer if
6068: he/she so chose). For that case completable will return 0, whereas answerable will return 1.
6069:
6070: =cut
6071:
6072: sub answerable {
6073: my $self = shift;
6074: if (!$self->is_problem()) { return 0; }
6075: my $partCount = $self->countParts();
6076: foreach my $part (@{$self->parts()}) {
6077: if ($part eq '0' && $partCount != 1) { next; }
6078: my $status = $self->status($part);
6079: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
6080: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
6081: $status == ANSWER_SUBMITTED() ) {
6082: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
6083: return 1;
6084: }
6085: }
6086: if ($status == OPEN() || $status == TRIES_LEFT() || $status == NETWORK_FAILURE()) {
6087: return 1;
6088: }
6089: }
6090: # None of the parts were answerable, so neither is this problem.
6091: return 0;
6092: }
6093:
6094: =pod
6095:
6096: =head2 Resource/Nav Map Navigation
6097:
6098: =over 4
6099:
6100: =item * B<getNext>():
6101:
6102: Retreive an array of the possible next resources after this
6103: one. Always returns an array, even in the one- or zero-element case.
6104:
6105: =item * B<getPrevious>():
6106:
6107: Retreive an array of the possible previous resources from this
6108: one. Always returns an array, even in the one- or zero-element case.
6109:
6110: =cut
6111:
6112: sub getNext {
6113: my $self = shift;
6114: my @branches;
6115: my $to = $self->to();
6116: foreach my $branch ( split(/,/, $to) ) {
6117: my $choice = $self->{NAV_MAP}->getById($branch);
6118: #if (!$choice->condition()) { next; }
6119: my $next = $choice->goesto();
6120: $next = $self->{NAV_MAP}->getById($next);
6121:
6122: push @branches, $next;
6123: }
6124: return \@branches;
6125: }
6126:
6127: sub getPrevious {
6128: my $self = shift;
6129: my @branches;
6130: my $from = $self->from();
6131: foreach my $branch ( split(/,/, $from)) {
6132: my $choice = $self->{NAV_MAP}->getById($branch);
6133: my $prev = $choice->comesfrom();
6134: $prev = $self->{NAV_MAP}->getById($prev);
6135:
6136: push @branches, $prev;
6137: }
6138: return \@branches;
6139: }
6140:
6141: sub browsePriv {
6142: my $self = shift;
6143: my $noblockcheck = shift;
6144: if (defined($self->{BROWSE_PRIV})) {
6145: return $self->{BROWSE_PRIV};
6146: }
6147:
6148: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
6149: $self->{SYMB},undef,
6150: undef,$noblockcheck);
6151: }
6152:
6153: =pod
6154:
6155: =back
6156:
6157: =cut
6158:
6159: 1;
6160:
6161: __END__
6162:
6163:
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