mirrored from git://git.moodle.org/moodle.git
/
lib.php
2331 lines (1920 loc) · 81.1 KB
/
lib.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<?PHP // $Id$
require_once("$CFG->dirroot/files/mimetypes.php");
/// CONSTANTS ///////////////////////////////////////////////////////////
define("FORUM_MODE_FLATOLDEST", 1);
define("FORUM_MODE_FLATNEWEST", -1);
define("FORUM_MODE_THREADED", 2);
define("FORUM_MODE_NESTED", 3);
$FORUM_LAYOUT_MODES = array ( FORUM_MODE_FLATOLDEST => get_string("modeflatoldestfirst", "forum"),
FORUM_MODE_FLATNEWEST => get_string("modeflatnewestfirst", "forum"),
FORUM_MODE_THREADED => get_string("modethreaded", "forum"),
FORUM_MODE_NESTED => get_string("modenested", "forum") );
// These are course content forums that can be added to the course manually
$FORUM_TYPES = array ("general" => get_string("generalforum", "forum"),
"eachuser" => get_string("eachuserforum", "forum"),
"single" => get_string("singleforum", "forum") );
$FORUM_OPEN_MODES = array ("2" => get_string("openmode2", "forum"),
"1" => get_string("openmode1", "forum"),
"0" => get_string("openmode0", "forum") );
if (!isset($CFG->forum_displaymode)) {
set_config("forum_displaymode", FORUM_MODE_NESTED);
}
if (!isset($CFG->forum_shortpost)) {
set_config("forum_shortpost", 300); // Less non-HTML characters than this is short
}
if (!isset($CFG->forum_longpost)) {
set_config("forum_longpost", 600); // More non-HTML characters than this is long
}
if (!isset($CFG->forum_manydiscussions)) {
set_config("forum_manydiscussions", 100); // Number of discussions on a page
}
if (!isset($CFG->forum_maxbytes)) {
set_config("forum_maxbytes", 512000); // Default maximum size for all forums
}
/// STANDARD FUNCTIONS ///////////////////////////////////////////////////////////
function forum_add_instance($forum) {
// Given an object containing all the necessary data,
// (defined by the form in mod.html) this function
// will create a new instance and return the id number
// of the new instance.
global $CFG;
$forum->timemodified = time();
if (! $forum->id = insert_record("forum", $forum)) {
return false;
}
if (!$forum->userating) {
$forum->assessed = 0;
}
if (!empty($forum->ratingtime)) {
$forum->assesstimestart = make_timestamp($forum->startyear, $forum->startmonth, $forum->startday,
$forum->starthour, $forum->startminute, 0);
$forum->assesstimefinish = make_timestamp($forum->finishyear, $forum->finishmonth, $forum->finishday,
$forum->finishhour, $forum->finishminute, 0);
} else {
$forum->assesstimestart = 0;
$forum->assesstimefinish = 0;
}
if ($forum->type == "single") { // Create related discussion.
$discussion->course = $forum->course;
$discussion->forum = $forum->id;
$discussion->name = $forum->name;
$discussion->intro = $forum->intro;
$discussion->assessed = $forum->assessed;
if (! forum_add_discussion($discussion)) {
error("Could not add the discussion for this forum");
}
}
add_to_log($forum->course, "forum", "add", "index.php?f=$forum->id", "$forum->id");
return $forum->id;
}
function forum_update_instance($forum) {
// Given an object containing all the necessary data,
// (defined by the form in mod.html) this function
// will update an existing instance with new data.
$forum->timemodified = time();
$forum->id = $forum->instance;
if (!$forum->userating) {
$forum->assessed = 0;
}
if (!empty($forum->ratingtime)) {
$forum->assesstimestart = make_timestamp($forum->startyear, $forum->startmonth, $forum->startday,
$forum->starthour, $forum->startminute, 0);
$forum->assesstimefinish = make_timestamp($forum->finishyear, $forum->finishmonth, $forum->finishday,
$forum->finishhour, $forum->finishminute, 0);
} else {
$forum->assesstimestart = 0;
$forum->assesstimefinish = 0;
}
if ($forum->type == "single") { // Update related discussion and post.
if (! $discussion = get_record("forum_discussions", "forum", $forum->id)) {
if ($discussions = get_records("forum_discussions", "forum", $forum->id, "timemodified ASC")) {
notify("Warning! There is more than one discussion in this forum - using the most recent");
$discussion = array_pop($discussions);
} else {
error("Could not find the discussion in this forum");
}
}
if (! $post = get_record("forum_posts", "id", $discussion->firstpost)) {
error("Could not find the first post in this forum discussion");
}
$post->subject = $forum->name;
$post->message = $forum->intro;
$post->modified = $forum->timemodified;
if (! update_record("forum_posts", $post)) {
error("Could not update the first post");
}
$discussion->name = $forum->name;
if (! update_record("forum_discussions", $discussion)) {
error("Could not update the discussion");
}
}
if (update_record("forum", $forum)) {
add_to_log($forum->course, "forum", "update", "index.php?f=$forum->id", "$forum->id");
return true;
} else {
return false;
}
}
function forum_delete_instance($id) {
// Given an ID of an instance of this module,
// this function will permanently delete the instance
// and any data that depends on it.
if (! $forum = get_record("forum", "id", "$id")) {
return false;
}
$result = true;
if ($discussions = get_records("forum_discussions", "forum", $forum->id)) {
foreach ($discussions as $discussion) {
if (! forum_delete_discussion($discussion)) {
$result = false;
}
}
}
if (! delete_records("forum_subscriptions", "forum", "$forum->id")) {
$result = false;
}
if (! delete_records("forum", "id", "$forum->id")) {
$result = false;
}
return $result;
}
function forum_cron () {
/// Function to be run periodically according to the moodle cron
/// Finds all posts that have yet to be mailed out, and mails them
/// out to all subscribers
global $CFG, $USER;
if (!empty($USER)) { // Remember real USER account if necessary
$realuser = $USER;
}
$cutofftime = time() - $CFG->maxeditingtime;
if ($posts = forum_get_unmailed_posts($cutofftime)) {
/// Mark them all now as being mailed. It's unlikely but possible there
/// might be an error later so that a post is NOT actually mailed out,
/// but since mail isn't crucial, we can accept this risk. Doing it now
/// prevents the risk of duplicated mails, which is a worse problem.
foreach ($posts as $key => $post) {
if (! set_field("forum_posts", "mailed", "1", "id", "$post->id")) {
echo "Error marking post id post->id as being mailed. This post will not be mailed.\n";
unset($posts[$key]);
}
}
$timenow = time();
foreach ($posts as $post) {
echo "\n";
print_string("processingpost", "forum", $post->id);
echo "\n";
if (! $userfrom = get_record("user", "id", "$post->userid")) {
echo "Could not find user $post->userid\n";
continue;
}
if (! $discussion = get_record("forum_discussions", "id", "$post->discussion")) {
echo "Could not find discussion $post->discussion\n";
continue;
}
if (! $forum = get_record("forum", "id", "$discussion->forum")) {
echo "Could not find forum $discussion->forum\n";
continue;
}
if (! $course = get_record("course", "id", "$forum->course")) {
echo "Could not find course $forum->course\n";
continue;
}
$groupmode = false;
if ($cm = get_coursemodule_from_instance("forum", $forum->id, $course->id)) {
if ($groupmode = groupmode($course, $cm)) { // Groups are being used
if (!$group = user_group($course->id, $userfrom->id)) { // If user not in a group
continue; // Be safe and don't send it to anyone
}
}
}
if ($users = forum_subscribed_users($course, $forum)) {
$canunsubscribe = ! forum_is_forcesubscribed($forum->id);
$mailcount=0;
foreach ($users as $userto) {
if ($groupmode) { // Look for a reason not to send this email
if (!isteacheredit($course->id, $userto->id)) {
if (!ismember($group->id, $userto->id)) {
continue;
}
}
}
/// Override the language and timezone of the "current" user, so that
/// mail is customised for the receiver.
$USER->lang = $userto->lang;
$USER->timezone = $userto->timezone;
$canreply = forum_user_can_post($forum, $userto);
$by->name = fullname($userfrom, isteacher($course->id, $userto->id));
$by->date = userdate($post->modified, "", $userto->timezone);
$strbynameondate = get_string("bynameondate", "forum", $by);
$strforums = get_string("forums", "forum");
$postsubject = "$course->shortname: $post->subject";
$posttext = "$course->shortname -> $strforums -> $forum->name";
if ($discussion->name == $forum->name) {
$posttext .= "\n";
} else {
$posttext .= " -> $discussion->name\n";
}
$posttext .= "---------------------------------------------------------------------\n";
$posttext .= "$post->subject\n";
$posttext .= $strbynameondate."\n";
$posttext .= "---------------------------------------------------------------------\n";
$posttext .= format_text_email($post->message, $post->format);
$posttext .= "\n\n";
if ($post->attachment) {
$post->course = $course->id;
$post->forum = $forum->id;
$posttext .= forum_print_attachments($post, "text");
}
if ($canreply) {
$posttext .= "---------------------------------------------------------------------\n";
$posttext .= get_string("postmailinfo", "forum", $course->shortname)."\n";
$posttext .= "$CFG->wwwroot/mod/forum/post.php?reply=$post->id\n";
}
if ($canunsubscribe) {
$posttext .= "\n---------------------------------------------------------------------\n";
$posttext .= get_string("unsubscribe", "forum");
$posttext .= ": $CFG->wwwroot/mod/forum/subscribe.php?id=$forum->id\n";
}
if ($userto->mailformat == 1) { // HTML
$posthtml = "<p><font face=\"sans-serif\">".
"<a target=\"_blank\" href=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->shortname</a> -> ".
"<a target=\"_blank\" href=\"$CFG->wwwroot/mod/forum/index.php?id=$course->id\">$strforums</a> -> ".
"<a target=\"_blank\" href=\"$CFG->wwwroot/mod/forum/view.php?f=$forum->id\">$forum->name</a>";
if ($discussion->name == $forum->name) {
$posthtml .= "</font></p>";
} else {
$posthtml .= " -> <a target=\"_blank\" href=\"$CFG->wwwroot/mod/forum/discuss.php?d=$discussion->id\">$discussion->name</a></font></p>";
}
$posthtml .= forum_make_mail_post($post, $userfrom, $userto, $course, false, $canreply, false, false);
if ($canunsubscribe) {
$posthtml .= "\n<br /><hr size=\"1\" noshade /><p align=\"right\"><font size=\"1\"><a href=\"$CFG->wwwroot/mod/forum/subscribe.php?id=$forum->id\">".get_string("unsubscribe", "forum")."</a></font></p>";
}
} else {
$posthtml = "";
}
if (! email_to_user($userto, $userfrom, $postsubject, $posttext, $posthtml)) {
echo "Error: mod/forum/cron.php: Could not send out mail for id $post->id to user $userto->id ($userto->email) .. not trying again.\n";
} else {
$mailcount++;
}
}
echo ".... mailed to $mailcount users.\n";
}
}
}
if (!empty($realuser)) { // Restore real USER if necessary
$USER = $realuser;
}
return true;
}
function forum_user_outline($course, $user, $mod, $forum) {
if ($posts = forum_get_user_posts($forum->id, $user->id)) {
$result->info = get_string("numposts", "forum", count($posts));
$lastpost = array_pop($posts);
$result->time = $lastpost->modified;
return $result;
}
return NULL;
}
function forum_user_complete($course, $user, $mod, $forum) {
global $CFG;
if ($posts = forum_get_user_posts($forum->id, $user->id)) {
foreach ($posts as $post) {
forum_print_post($post, $course->id, $ownpost=false, $reply=false, $link=false, $rate=false);
}
} else {
echo "<P>".get_string("noposts", "forum")."</P>";
}
}
function forum_print_recent_activity($course, $isteacher, $timestart) {
/// Given a course and a date, prints a summary of all the new
/// messages posted in the course since that date
global $CFG;
$heading = false;
$content = false;
if (!$logs = get_records_select("log", "time > '$timestart' AND ".
"course = '$course->id' AND ".
"module = 'forum' AND ".
"action LIKE 'add %' ", "time ASC")){
return false;
}
$strftimerecent = get_string("strftimerecent");
$isteacheredit = isteacheredit($course->id);
$mygroupid = mygroupid($course->id);
$groupmode = array(); /// To cache group modes
foreach ($logs as $log) {
//Get post info, I'll need it later
$post = forum_get_post_from_log($log);
//Create a temp valid module structure (course,id)
$tempmod->course = $log->course;
$tempmod->id = $post->forum;
//Obtain the visible property from the instance
$modvisible = instance_is_visible($log->module, $tempmod);
//Only if the mod is visible
if ($modvisible) {
if ($post) {
/// Check whether this is for teachers only
$teacheronly = "";
if ($forum = get_record("forum", "id", $post->forum)) {
if ($forum->type == "teacher") {
if ($isteacher) {
$teacheronly = "class=\"teacheronly\"";
} else {
continue;
}
}
}
/// Check whether this is belongs to a discussion in a group that
/// should NOT be accessible to the current user
if (!$isteacheredit) { /// Because editing teachers can see everything
if (!isset($cm[$post->forum])) {
$cm[$forum->id] = get_coursemodule_from_instance("forum", $forum->id, $course->id);
$groupmode[$forum->id] = groupmode($course, $cm[$forum->id]);
}
if ($groupmode($forum->id)) {
if ($mygroupid != forum_get_groupid_from_discussion($post->discussion, $course->id)) {
continue;
}
}
}
if (! $heading) {
print_headline(get_string("newforumposts", "forum").":");
$heading = true;
$content = true;
}
$date = userdate($post->modified, $strftimerecent);
$fullname = fullname($post, $isteacher);
echo "<p $teacheronly><font size=1>$date - $fullname<br>";
echo "\"<a href=\"$CFG->wwwroot/mod/forum/$log->url\">";
if ($log->action == "add discussion") {
echo "<b>$post->subject</b>";
} else {
echo "$post->subject";
}
echo "</a>\"</font></p>";
}
}
}
return $content;
}
function forum_print_recent_instance_activity($forum, $timestart, $detail=false) {
global $CFG, $THEME;
if (!$posts = forum_get_recent_posts($timestart, $forum->id)) {
return false;
}
foreach ($posts as $post) {
echo '<table border="0" cellpadding="3" cellspacing="0" class="forumpost">';
echo "<tr><td bgcolor=\"$THEME->cellcontent2\" class=\"forumpostpicture\" width=\"35\" valign=\"top\">";
print_user_picture($post->userid, $forum->course, $post->picture);
echo "</td>";
if ($post->parent) {
echo "<td nowrap bgcolor=\"$THEME->cellheading\" class=\"forumpostheader\" width=\"100%\">";
} else {
echo "<td nowrap bgcolor=\"$THEME->cellheading2\" class=\"forumpostheadertopic\" width=\"100%\">";
}
echo "<p>";
echo "<font size=3>";
echo "<a href=\"$CFG->wwwroot/mod/forum/discuss.php?d=$post->discussion#$post->id\">";
echo $post->subject;
echo "</a></font><br>";
echo "<font size=2>";
$fullname = fullname($post);
$by->name = "<a href=\"$CFG->wwwroot/user/view.php?id=$post->userid&course=$post->course\">$fullname</a>";
$by->date = userdate($post->modified);
print_string("bynameondate", "forum", $by);
echo "</font></p></td></tr></table>";
}
}
function forum_grades($forumid) {
/// Must return an array of grades, indexed by user, and a max grade.
if (!$forum = get_record("forum", "id", $forumid)) {
return false;
}
if (!$forum->assessed) {
return false;
}
$scalemenu = make_grades_menu($forum->scale);
$currentuser = 0;
$ratingsuser = array();
if ($ratings = forum_get_user_grades($forumid)) {
foreach ($ratings as $rating) { // Ordered by user
if ($currentuser and $rating->userid != $currentuser) {
if (!empty($ratingsuser)) {
if ($forum->scale < 0) {
$return->grades[$currentuser] = forum_get_ratings_mean(0, $scalemenu, $ratingsuser);
$return->grades[$currentuser] .= "<br />".forum_get_ratings_summary(0, $scalemenu, $ratingsuser);
} else {
$total = 0;
$count = 0;
foreach ($ratingsuser as $ra) {
$total += $ra;
$count ++;
}
$return->grades[$currentuser] = format_float($total/$count, 2);
}
} else {
$return->grades[$currentuser] = "";
}
$ratingsuser = array();
}
$ratingsuser[] = $rating->rating;
$currentuser = $rating->userid;
}
if (!empty($ratingsuser)) {
if ($forum->scale < 0) {
$return->grades[$currentuser] = forum_get_ratings_mean(0, $scalemenu, $ratingsuser);
$return->grades[$currentuser] .= "<br />".forum_get_ratings_summary(0, $scalemenu, $ratingsuser);
} else {
$total = 0;
$count = 0;
foreach ($ratingsuser as $ra) {
$total += $ra;
$count ++;
}
$return->grades[$currentuser] = format_float((float)$total/(float)$count, 2);
}
} else {
$return->grades[$currentuser] = "";
}
} else {
$return->grades = array();
}
if ($forum->scale < 0) {
$return->maxgrade = "";
} else {
$return->maxgrade = $forum->scale;
}
return $return;
}
function forum_get_participants($forumid) {
//Returns the users with data in one forum
//(users with records in forum_subscriptions, forum_posts and forum_ratings, students)
global $CFG;
//Get students from forum_subscriptions
$st_subscriptions = get_records_sql("SELECT DISTINCT u.*
FROM {$CFG->prefix}user u,
{$CFG->prefix}forum_subscriptions s
WHERE s.forum = '$forumid' and
u.id = s.userid");
//Get students from forum_posts
$st_posts = get_records_sql("SELECT DISTINCT u.*
FROM {$CFG->prefix}user u,
{$CFG->prefix}forum_discussions d,
{$CFG->prefix}forum_posts p
WHERE d.forum = '$forumid' and
p.discussion = d.id and
u.id = p.userid");
//Get students from forum_ratings
$st_ratings = get_records_sql("SELECT DISTINCT u.*
FROM {$CFG->prefix}user u,
{$CFG->prefix}forum_discussions d,
{$CFG->prefix}forum_posts p,
{$CFG->prefix}forum_ratings r
WHERE d.forum = '$forumid' and
p.discussion = d.id and
r.post = p.id and
u.id = r.userid");
//Add st_posts to st_subscriptions
if ($st_posts) {
foreach ($st_posts as $st_post) {
$st_subscriptions[$st_post->id] = $st_post;
}
}
//Add st_ratings to st_subscriptions
if ($st_ratings) {
foreach ($st_ratings as $st_rating) {
$st_subscriptions[$st_rating->id] = $st_rating;
}
}
//Return st_subscriptions array (it contains an array of unique users)
return ($st_subscriptions);
}
/// SQL FUNCTIONS ///////////////////////////////////////////////////////////
function forum_get_post_full($postid) {
/// Gets a post with all info ready for forum_print_post
global $CFG;
return get_record_sql("SELECT p.*, u.firstname, u.lastname, u.email, u.picture
FROM {$CFG->prefix}forum_posts p,
{$CFG->prefix}user u
WHERE p.id = '$postid'
AND p.userid = u.id");
}
function forum_get_discussion_posts($discussion, $sort) {
/// Gets posts with all info ready for forum_print_post
global $CFG;
return get_records_sql("SELECT p.*, u.firstname, u.lastname, u.email, u.picture
FROM {$CFG->prefix}forum_posts p,
{$CFG->prefix}user u
WHERE p.discussion = $discussion
AND p.parent > 0
AND p.userid = u.id $sort");
}
function forum_get_child_posts($parent) {
/// Gets posts with all info ready for forum_print_post
global $CFG;
return get_records_sql("SELECT p.*, u.firstname, u.lastname, u.email, u.picture
FROM {$CFG->prefix}forum_posts p,
{$CFG->prefix}user u
WHERE p.parent = '$parent'
AND p.userid = u.id
ORDER BY p.created ASC");
}
function forum_search_posts($searchterms, $courseid, $page=0, $recordsperpage=50, &$totalcount) {
/// Returns a list of posts found using an array of search terms
/// eg word +word -word
///
global $CFG;
if (!isteacher($courseid)) {
$notteacherforum = "AND f.type <> 'teacher'";
$forummodule = get_record("modules", "name", "forum");
$onlyvisible = " AND f.id = cm.instance AND cm.visible = 1 AND cm.module = $forummodule->id";
$onlyvisibletable = ", {$CFG->prefix}course_modules cm";
} else {
$notteacherforum = "";
$onlyvisible = "";
$onlyvisibletable = "";
}
switch ($CFG->dbtype) {
case "mysql":
$limit = "LIMIT $page,$recordsperpage";
break;
case "postgres7":
$limit = "LIMIT $recordsperpage OFFSET ".($page * $recordsperpage);
break;
default:
$limit = "LIMIT $recordsperpage,$page";
}
/// Some differences in syntax for PostgreSQL
if ($CFG->dbtype == "postgres7") {
$LIKE = "ILIKE"; // case-insensitive
$NOTLIKE = "NOT ILIKE"; // case-insensitive
$REGEXP = "~*";
$NOTREGEXP = "!~*";
} else {
$LIKE = "LIKE";
$NOTLIKE = "NOT LIKE";
$REGEXP = "REGEXP";
$NOTREGEXP = "NOT REGEXP";
}
$messagesearch = "";
$subjectsearch = "";
foreach ($searchterms as $searchterm) {
if (strlen($searchterm) < 2) {
continue;
}
if ($messagesearch) {
$messagesearch .= " AND ";
}
if ($subjectsearch) {
$subjectsearch .= " AND ";
}
if (substr($searchterm,0,1) == "+") {
$searchterm = substr($searchterm,1);
$messagesearch .= " p.message $REGEXP '(^|[^a-zA-Z0-9])$searchterm([^a-zA-Z0-9]|$)' ";
$subjectsearch .= " p.subject $REGEXP '(^|[^a-zA-Z0-9])$searchterm([^a-zA-Z0-9]|$)' ";
} else if (substr($searchterm,0,1) == "-") {
$searchterm = substr($searchterm,1);
$messagesearch .= " p.message $NOTREGEXP '(^|[^a-zA-Z0-9])$searchterm([^a-zA-Z0-9]|$)' ";
$subjectsearch .= " p.subject $NOTREGEXP '(^|[^a-zA-Z0-9])$searchterm([^a-zA-Z0-9]|$)' ";
} else {
$messagesearch .= " p.message $LIKE '%$searchterm%' ";
$subjectsearch .= " p.subject $LIKE '%$searchterm%' ";
}
}
$selectsql = "{$CFG->prefix}forum_posts p,
{$CFG->prefix}forum_discussions d,
{$CFG->prefix}user u,
{$CFG->prefix}forum f $onlyvisibletable
WHERE ($messagesearch OR $subjectsearch)
AND p.userid = u.id
AND p.discussion = d.id
AND d.course = '$courseid'
AND d.forum = f.id $notteacherforum $onlyvisible";
$totalcount = count_records_sql("SELECT COUNT(*) FROM $selectsql");
return get_records_sql("SELECT p.*,u.firstname,u.lastname,u.email,u.picture FROM
$selectsql ORDER BY p.modified DESC $limit");
}
function forum_get_ratings($postid, $sort="u.firstname ASC") {
/// Returns a list of ratings for a particular post - sorted.
global $CFG;
return get_records_sql("SELECT u.*, r.rating, r.time
FROM {$CFG->prefix}forum_ratings r,
{$CFG->prefix}user u
WHERE r.post = '$postid'
AND r.userid = u.id
ORDER BY $sort");
}
function forum_get_unmailed_posts($cutofftime) {
/// Returns a list of all new posts that have not been mailed yet
global $CFG;
return get_records_sql("SELECT p.*, d.course
FROM {$CFG->prefix}forum_posts p,
{$CFG->prefix}forum_discussions d
WHERE p.mailed = 0
AND p.created < '$cutofftime'
AND p.discussion = d.id");
}
function forum_get_user_posts($forumid, $userid) {
/// Get all the posts for a user in a forum suitable for forum_print_post
global $CFG;
return get_records_sql("SELECT p.*, u.firstname, u.lastname, u.email, u.picture
FROM {$CFG->prefix}forum f,
{$CFG->prefix}forum_discussions d,
{$CFG->prefix}forum_posts p,
{$CFG->prefix}user u
WHERE f.id = '$forumid'
AND d.forum = f.id
AND p.discussion = d.id
AND p.userid = '$userid'
AND p.userid = u.id
ORDER BY p.modified ASC");
}
function forum_get_post_from_log($log) {
/// Given a log entry, return the forum post details for it.
global $CFG;
if ($log->action == "add post") {
return get_record_sql("SELECT p.*, d.forum, u.firstname, u.lastname, u.email, u.picture
FROM {$CFG->prefix}forum_discussions d,
{$CFG->prefix}forum_posts p,
{$CFG->prefix}user u
WHERE p.id = '$log->info'
AND d.id = p.discussion
AND p.userid = u.id
AND u.deleted <> '1'");
} else if ($log->action == "add discussion") {
return get_record_sql("SELECT p.*, d.forum, u.firstname, u.lastname, u.email, u.picture
FROM {$CFG->prefix}forum_discussions d,
{$CFG->prefix}forum_posts p,
{$CFG->prefix}user u
WHERE d.id = '$log->info'
AND d.firstpost = p.id
AND p.userid = u.id
AND u.deleted <> '1'");
}
return NULL;
}
function forum_get_firstpost_from_discussion($discussionid) {
/// Given a discussion id, return the first post from the discussion
global $CFG;
return get_record_sql("SELECT p.*
FROM {$CFG->prefix}forum_discussions d,
{$CFG->prefix}forum_posts p
WHERE d.id = '$discussionid'
AND d.firstpost = p.id ");
}
function forum_get_groupid_from_discussion($discussionid, $courseid) {
/// Given a discussion id, return the groupid of the first poster
global $CFG;
if ($info = get_record_sql("SELECT gm.groupid as id
FROM {$CFG->prefix}forum_discussions d,
{$CFG->prefix}forum_posts p,
{$CFG->prefix}groups g,
{$CFG->prefix}groups_members gm
WHERE d.id = '$discussionid'
AND g.courseid = '$courseid'
AND gm.groupid = g.id
AND gm.userid = d.userid")) {
return $info->groupid;
}
return 0;
}
function forum_get_user_grades($forumid) {
/// Get all user grades for a forum
global $CFG;
return get_records_sql("SELECT r.id, p.userid, r.rating
FROM {$CFG->prefix}forum_discussions d,
{$CFG->prefix}forum_posts p,
{$CFG->prefix}forum_ratings r
WHERE d.forum = '$forumid'
AND p.discussion = d.id
AND r.post = p.id
ORDER by p.userid ");
}
function forum_count_discussion_replies($forum="0") {
// Returns an array of counts of replies to each discussion (optionally in one forum)
global $CFG;
if ($forum) {
$forumselect = " AND d.forum = '$forum'";
}
return get_records_sql("SELECT p.discussion, (count(*)) as replies
FROM {$CFG->prefix}forum_posts p,
{$CFG->prefix}forum_discussions d
WHERE p.parent > 0
AND p.discussion = d.id
GROUP BY p.discussion");
}
function forum_count_unrated_posts($discussionid, $userid) {
// How many unrated posts are in the given discussion for a given user?
global $CFG;
if ($posts = get_record_sql("SELECT count(*) as num
FROM {$CFG->prefix}forum_posts
WHERE parent > 0
AND discussion = '$discussionid'
AND userid <> '$userid' ")) {
if ($rated = get_record_sql("SELECT count(*) as num
FROM {$CFG->prefix}forum_posts p,
{$CFG->prefix}forum_ratings r
WHERE p.discussion = '$discussionid'
AND p.id = r.post
AND r.userid = '$userid'")) {
$difference = $posts->num - $rated->num;
if ($difference > 0) {
return $difference;
} else {
return 0; // Just in case there was a counting error
}
} else {
return $posts->num;
}
} else {
return 0;
}
}
function forum_get_discussions($forum="0", $forumsort="d.timemodified DESC",
$user=0, $fullpost=true, $currentgroup=0) {
/// Get all discussions in a forum
global $CFG;
if ($user) {
$userselect = " AND u.id = '$user' ";
} else {
$userselect = "";
}
if (empty($forumsort)) {
$forumsort = "d.timemodified DESC";
}
if (empty($fullpost)) {
$postdata = "p.id,p.subject,p.modified,p.discussion,p.userid";
} else {
$postdata = "p.*";
}
if ($currentgroup) {
$grouptable = ", {$CFG->prefix}groups_members gm ";
$groupselect = " AND gm.groupid = '$currentgroup' AND u.id = gm.userid ";
} else {
$grouptable = "";
$groupselect = "";
}
return get_records_sql("SELECT $postdata, d.timemodified, u.firstname, u.lastname, u.email, u.picture
FROM {$CFG->prefix}forum_discussions d,
{$CFG->prefix}forum_posts p,
{$CFG->prefix}user u $grouptable
WHERE d.forum = '$forum'
AND p.discussion = d.id
AND p.parent = 0
AND p.userid = u.id $groupselect $userselect
ORDER BY $forumsort");
}
function forum_get_user_discussions($courseid, $userid) {
/// Get all discussions started by a particular user in a course
global $CFG;
return get_records_sql("SELECT p.*, u.firstname, u.lastname, u.email, u.picture,
f.type as forumtype, f.name as forumname, f.id as forumid
FROM {$CFG->prefix}forum_discussions d,
{$CFG->prefix}forum_posts p,
{$CFG->prefix}user u,
{$CFG->prefix}forum f
WHERE d.course = '$courseid'
AND p.discussion = d.id
AND p.parent = 0
AND p.userid = u.id
AND u.id = '$userid'
AND d.forum = f.id
ORDER BY p.created DESC");
}
function forum_subscribed_users($course, $forum) {
/// Returns list of user objects that are subscribed to this forum
global $CFG;
if ($forum->forcesubscribe) {
if ($course->category) {
if ($forum->type == "teacher") {
return get_course_teachers($course->id); // Only teachers can be subscribed to teacher forums
} else {
return get_course_users($course->id); // Otherwise get everyone in the course
}
} else {
return get_site_users();
}
}
return get_records_sql("SELECT u.id, u.username, u.firstname, u.lastname, u.maildisplay, u.mailformat,
u.email, u.city, u.country, u.lastaccess, u.lastlogin, u.picture, u.timezone, u.lang
FROM {$CFG->prefix}user u,
{$CFG->prefix}forum_subscriptions s
WHERE s.forum = '$forum->id'
AND s.userid = u.id
AND u.deleted <> 1
ORDER BY u.email ASC");
}
function forum_get_recent_posts($sincetime, $forum="0") {
// Returns all forum posts since a given time. If forum is specified then
// this restricts the results
global $CFG;
if ($forum) {
$forumselect = " AND d.forum = '$forum'";
} else {
$forumselect = "";
}
return get_records_sql("SELECT p.*, d.name, u.id, u.firstname, u.lastname, u.picture, d.course
FROM {$CFG->prefix}forum_posts p,
{$CFG->prefix}forum_discussions d,
{$CFG->prefix}user u
WHERE p.modified > '$sincetime' $forumselect
AND p.userid = u.id
AND p.discussion = d.id
ORDER BY p.discussion ASC");
}
/// OTHER FUNCTIONS ///////////////////////////////////////////////////////////
function forum_get_course_forum($courseid, $type) {