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/mod/forum/ -> lib.php (source)
Differences Between: [Versions 310 and 311] [Versions 35 and 311] [Versions 36 and 311] [Versions 37 and 311] [Versions 38 and 311] [Versions 39 and 311]
1 <?php 2 // This file is part of Moodle - http://moodle.org/ 3 // 4 // Moodle is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // Moodle is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU General Public License for more details. 13 // 14 // You should have received a copy of the GNU General Public License 15 // along with Moodle. If not, see <http://www.gnu.org/licenses/>. 16 17 /** 18 * @package mod_forum 19 * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com} 20 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 21 */ 22 23 defined('MOODLE_INTERNAL') || die(); 24 25 /** Include required files */ 26 require_once (__DIR__ . '/deprecatedlib.php'); 27 require_once($CFG->libdir.'/filelib.php'); 28 29 /// CONSTANTS /////////////////////////////////////////////////////////// 30 31 define('FORUM_MODE_FLATOLDEST', 1); 32 define('FORUM_MODE_FLATNEWEST', -1); 33 define('FORUM_MODE_THREADED', 2); 34 define('FORUM_MODE_NESTED', 3); 35 define('FORUM_MODE_NESTED_V2', 4); 36 37 define('FORUM_CHOOSESUBSCRIBE', 0); 38 define('FORUM_FORCESUBSCRIBE', 1); 39 define('FORUM_INITIALSUBSCRIBE', 2); 40 define('FORUM_DISALLOWSUBSCRIBE',3); 41 42 /** 43 * FORUM_TRACKING_OFF - Tracking is not available for this forum. 44 */ 45 define('FORUM_TRACKING_OFF', 0); 46 47 /** 48 * FORUM_TRACKING_OPTIONAL - Tracking is based on user preference. 49 */ 50 define('FORUM_TRACKING_OPTIONAL', 1); 51 52 /** 53 * FORUM_TRACKING_FORCED - Tracking is on, regardless of user setting. 54 * Treated as FORUM_TRACKING_OPTIONAL if $CFG->forum_allowforcedreadtracking is off. 55 */ 56 define('FORUM_TRACKING_FORCED', 2); 57 58 define('FORUM_MAILED_PENDING', 0); 59 define('FORUM_MAILED_SUCCESS', 1); 60 define('FORUM_MAILED_ERROR', 2); 61 62 if (!defined('FORUM_CRON_USER_CACHE')) { 63 /** Defines how many full user records are cached in forum cron. */ 64 define('FORUM_CRON_USER_CACHE', 5000); 65 } 66 67 /** 68 * FORUM_POSTS_ALL_USER_GROUPS - All the posts in groups where the user is enrolled. 69 */ 70 define('FORUM_POSTS_ALL_USER_GROUPS', -2); 71 72 define('FORUM_DISCUSSION_PINNED', 1); 73 define('FORUM_DISCUSSION_UNPINNED', 0); 74 75 /// STANDARD FUNCTIONS /////////////////////////////////////////////////////////// 76 77 /** 78 * Given an object containing all the necessary data, 79 * (defined by the form in mod_form.php) this function 80 * will create a new instance and return the id number 81 * of the new instance. 82 * 83 * @param stdClass $forum add forum instance 84 * @param mod_forum_mod_form $mform 85 * @return int intance id 86 */ 87 function forum_add_instance($forum, $mform = null) { 88 global $CFG, $DB; 89 90 require_once($CFG->dirroot.'/mod/forum/locallib.php'); 91 92 $forum->timemodified = time(); 93 94 if (empty($forum->assessed)) { 95 $forum->assessed = 0; 96 } 97 98 if (empty($forum->ratingtime) or empty($forum->assessed)) { 99 $forum->assesstimestart = 0; 100 $forum->assesstimefinish = 0; 101 } 102 103 $forum->id = $DB->insert_record('forum', $forum); 104 $modcontext = context_module::instance($forum->coursemodule); 105 106 if ($forum->type == 'single') { // Create related discussion. 107 $discussion = new stdClass(); 108 $discussion->course = $forum->course; 109 $discussion->forum = $forum->id; 110 $discussion->name = $forum->name; 111 $discussion->assessed = $forum->assessed; 112 $discussion->message = $forum->intro; 113 $discussion->messageformat = $forum->introformat; 114 $discussion->messagetrust = trusttext_trusted(context_course::instance($forum->course)); 115 $discussion->mailnow = false; 116 $discussion->groupid = -1; 117 118 $message = ''; 119 120 $discussion->id = forum_add_discussion($discussion, null, $message); 121 122 if ($mform and $draftid = file_get_submitted_draft_itemid('introeditor')) { 123 // Ugly hack - we need to copy the files somehow. 124 $discussion = $DB->get_record('forum_discussions', array('id'=>$discussion->id), '*', MUST_EXIST); 125 $post = $DB->get_record('forum_posts', array('id'=>$discussion->firstpost), '*', MUST_EXIST); 126 127 $options = array('subdirs'=>true); // Use the same options as intro field! 128 $post->message = file_save_draft_area_files($draftid, $modcontext->id, 'mod_forum', 'post', $post->id, $options, $post->message); 129 $DB->set_field('forum_posts', 'message', $post->message, array('id'=>$post->id)); 130 } 131 } 132 133 forum_update_calendar($forum, $forum->coursemodule); 134 forum_grade_item_update($forum); 135 136 $completiontimeexpected = !empty($forum->completionexpected) ? $forum->completionexpected : null; 137 \core_completion\api::update_completion_date_event($forum->coursemodule, 'forum', $forum->id, $completiontimeexpected); 138 139 return $forum->id; 140 } 141 142 /** 143 * Handle changes following the creation of a forum instance. 144 * This function is typically called by the course_module_created observer. 145 * 146 * @param object $context the forum context 147 * @param stdClass $forum The forum object 148 * @return void 149 */ 150 function forum_instance_created($context, $forum) { 151 if ($forum->forcesubscribe == FORUM_INITIALSUBSCRIBE) { 152 $users = \mod_forum\subscriptions::get_potential_subscribers($context, 0, 'u.id, u.email'); 153 foreach ($users as $user) { 154 \mod_forum\subscriptions::subscribe_user($user->id, $forum, $context); 155 } 156 } 157 } 158 159 /** 160 * Given an object containing all the necessary data, 161 * (defined by the form in mod_form.php) this function 162 * will update an existing instance with new data. 163 * 164 * @global object 165 * @param object $forum forum instance (with magic quotes) 166 * @return bool success 167 */ 168 function forum_update_instance($forum, $mform) { 169 global $CFG, $DB, $OUTPUT, $USER; 170 171 require_once($CFG->dirroot.'/mod/forum/locallib.php'); 172 173 $forum->timemodified = time(); 174 $forum->id = $forum->instance; 175 176 if (empty($forum->assessed)) { 177 $forum->assessed = 0; 178 } 179 180 if (empty($forum->ratingtime) or empty($forum->assessed)) { 181 $forum->assesstimestart = 0; 182 $forum->assesstimefinish = 0; 183 } 184 185 $oldforum = $DB->get_record('forum', array('id'=>$forum->id)); 186 187 // MDL-3942 - if the aggregation type or scale (i.e. max grade) changes then recalculate the grades for the entire forum 188 // if scale changes - do we need to recheck the ratings, if ratings higher than scale how do we want to respond? 189 // for count and sum aggregation types the grade we check to make sure they do not exceed the scale (i.e. max score) when calculating the grade 190 $updategrades = false; 191 192 if ($oldforum->assessed <> $forum->assessed) { 193 // Whether this forum is rated. 194 $updategrades = true; 195 } 196 197 if ($oldforum->scale <> $forum->scale) { 198 // The scale currently in use. 199 $updategrades = true; 200 } 201 202 if (empty($oldforum->grade_forum) || $oldforum->grade_forum <> $forum->grade_forum) { 203 // The whole forum grading. 204 $updategrades = true; 205 } 206 207 if ($updategrades) { 208 forum_update_grades($forum); // Recalculate grades for the forum. 209 } 210 211 if ($forum->type == 'single') { // Update related discussion and post. 212 $discussions = $DB->get_records('forum_discussions', array('forum'=>$forum->id), 'timemodified ASC'); 213 if (!empty($discussions)) { 214 if (count($discussions) > 1) { 215 echo $OUTPUT->notification(get_string('warnformorepost', 'forum')); 216 } 217 $discussion = array_pop($discussions); 218 } else { 219 // try to recover by creating initial discussion - MDL-16262 220 $discussion = new stdClass(); 221 $discussion->course = $forum->course; 222 $discussion->forum = $forum->id; 223 $discussion->name = $forum->name; 224 $discussion->assessed = $forum->assessed; 225 $discussion->message = $forum->intro; 226 $discussion->messageformat = $forum->introformat; 227 $discussion->messagetrust = true; 228 $discussion->mailnow = false; 229 $discussion->groupid = -1; 230 231 $message = ''; 232 233 forum_add_discussion($discussion, null, $message); 234 235 if (! $discussion = $DB->get_record('forum_discussions', array('forum'=>$forum->id))) { 236 print_error('cannotadd', 'forum'); 237 } 238 } 239 if (! $post = $DB->get_record('forum_posts', array('id'=>$discussion->firstpost))) { 240 print_error('cannotfindfirstpost', 'forum'); 241 } 242 243 $cm = get_coursemodule_from_instance('forum', $forum->id); 244 $modcontext = context_module::instance($cm->id, MUST_EXIST); 245 246 $post = $DB->get_record('forum_posts', array('id'=>$discussion->firstpost), '*', MUST_EXIST); 247 $post->subject = $forum->name; 248 $post->message = $forum->intro; 249 $post->messageformat = $forum->introformat; 250 $post->messagetrust = trusttext_trusted($modcontext); 251 $post->modified = $forum->timemodified; 252 $post->userid = $USER->id; // MDL-18599, so that current teacher can take ownership of activities. 253 254 if ($mform and $draftid = file_get_submitted_draft_itemid('introeditor')) { 255 // Ugly hack - we need to copy the files somehow. 256 $options = array('subdirs'=>true); // Use the same options as intro field! 257 $post->message = file_save_draft_area_files($draftid, $modcontext->id, 'mod_forum', 'post', $post->id, $options, $post->message); 258 } 259 260 \mod_forum\local\entities\post::add_message_counts($post); 261 $DB->update_record('forum_posts', $post); 262 $discussion->name = $forum->name; 263 $DB->update_record('forum_discussions', $discussion); 264 } 265 266 $DB->update_record('forum', $forum); 267 268 $modcontext = context_module::instance($forum->coursemodule); 269 if (($forum->forcesubscribe == FORUM_INITIALSUBSCRIBE) && ($oldforum->forcesubscribe <> $forum->forcesubscribe)) { 270 $users = \mod_forum\subscriptions::get_potential_subscribers($modcontext, 0, 'u.id, u.email', ''); 271 foreach ($users as $user) { 272 \mod_forum\subscriptions::subscribe_user($user->id, $forum, $modcontext); 273 } 274 } 275 276 forum_update_calendar($forum, $forum->coursemodule); 277 forum_grade_item_update($forum); 278 279 $completiontimeexpected = !empty($forum->completionexpected) ? $forum->completionexpected : null; 280 \core_completion\api::update_completion_date_event($forum->coursemodule, 'forum', $forum->id, $completiontimeexpected); 281 282 return true; 283 } 284 285 286 /** 287 * Given an ID of an instance of this module, 288 * this function will permanently delete the instance 289 * and any data that depends on it. 290 * 291 * @global object 292 * @param int $id forum instance id 293 * @return bool success 294 */ 295 function forum_delete_instance($id) { 296 global $DB; 297 298 if (!$forum = $DB->get_record('forum', array('id'=>$id))) { 299 return false; 300 } 301 if (!$cm = get_coursemodule_from_instance('forum', $forum->id)) { 302 return false; 303 } 304 if (!$course = $DB->get_record('course', array('id'=>$cm->course))) { 305 return false; 306 } 307 308 $context = context_module::instance($cm->id); 309 310 // now get rid of all files 311 $fs = get_file_storage(); 312 $fs->delete_area_files($context->id); 313 314 $result = true; 315 316 \core_completion\api::update_completion_date_event($cm->id, 'forum', $forum->id, null); 317 318 // Delete digest and subscription preferences. 319 $DB->delete_records('forum_digests', array('forum' => $forum->id)); 320 $DB->delete_records('forum_subscriptions', array('forum'=>$forum->id)); 321 $DB->delete_records('forum_discussion_subs', array('forum' => $forum->id)); 322 323 if ($discussions = $DB->get_records('forum_discussions', array('forum'=>$forum->id))) { 324 foreach ($discussions as $discussion) { 325 if (!forum_delete_discussion($discussion, true, $course, $cm, $forum)) { 326 $result = false; 327 } 328 } 329 } 330 331 forum_tp_delete_read_records(-1, -1, -1, $forum->id); 332 333 forum_grade_item_delete($forum); 334 335 // We must delete the module record after we delete the grade item. 336 if (!$DB->delete_records('forum', array('id'=>$forum->id))) { 337 $result = false; 338 } 339 340 return $result; 341 } 342 343 344 /** 345 * Indicates API features that the forum supports. 346 * 347 * @uses FEATURE_GROUPS 348 * @uses FEATURE_GROUPINGS 349 * @uses FEATURE_MOD_INTRO 350 * @uses FEATURE_COMPLETION_TRACKS_VIEWS 351 * @uses FEATURE_COMPLETION_HAS_RULES 352 * @uses FEATURE_GRADE_HAS_GRADE 353 * @uses FEATURE_GRADE_OUTCOMES 354 * @param string $feature 355 * @return mixed True if yes (some features may use other values) 356 */ 357 function forum_supports($feature) { 358 switch($feature) { 359 case FEATURE_GROUPS: return true; 360 case FEATURE_GROUPINGS: return true; 361 case FEATURE_MOD_INTRO: return true; 362 case FEATURE_COMPLETION_TRACKS_VIEWS: return true; 363 case FEATURE_COMPLETION_HAS_RULES: return true; 364 case FEATURE_GRADE_HAS_GRADE: return true; 365 case FEATURE_GRADE_OUTCOMES: return true; 366 case FEATURE_RATE: return true; 367 case FEATURE_BACKUP_MOODLE2: return true; 368 case FEATURE_SHOW_DESCRIPTION: return true; 369 case FEATURE_PLAGIARISM: return true; 370 case FEATURE_ADVANCED_GRADING: return true; 371 372 default: return null; 373 } 374 } 375 376 /** 377 * Create a message-id string to use in the custom headers of forum notification emails 378 * 379 * message-id is used by email clients to identify emails and to nest conversations 380 * 381 * @param int $postid The ID of the forum post we are notifying the user about 382 * @param int $usertoid The ID of the user being notified 383 * @return string A unique message-id 384 */ 385 function forum_get_email_message_id($postid, $usertoid) { 386 return generate_email_messageid(hash('sha256', $postid . 'to' . $usertoid)); 387 } 388 389 /** 390 * 391 * @param object $course 392 * @param object $user 393 * @param object $mod TODO this is not used in this function, refactor 394 * @param object $forum 395 * @return object A standard object with 2 variables: info (number of posts for this user) and time (last modified) 396 */ 397 function forum_user_outline($course, $user, $mod, $forum) { 398 global $CFG; 399 require_once("$CFG->libdir/gradelib.php"); 400 401 $gradeinfo = ''; 402 $gradetime = 0; 403 404 $grades = grade_get_grades($course->id, 'mod', 'forum', $forum->id, $user->id); 405 if (!empty($grades->items[0]->grades)) { 406 // Item 0 is the rating. 407 $grade = reset($grades->items[0]->grades); 408 $gradetime = max($gradetime, grade_get_date_for_user_grade($grade, $user)); 409 if (!$grade->hidden || has_capability('moodle/grade:viewhidden', context_course::instance($course->id))) { 410 $gradeinfo .= get_string('gradeforrating', 'forum', $grade) . html_writer::empty_tag('br'); 411 } else { 412 $gradeinfo .= get_string('gradeforratinghidden', 'forum') . html_writer::empty_tag('br'); 413 } 414 } 415 416 // Item 1 is the whole-forum grade. 417 if (!empty($grades->items[1]->grades)) { 418 $grade = reset($grades->items[1]->grades); 419 $gradetime = max($gradetime, grade_get_date_for_user_grade($grade, $user)); 420 if (!$grade->hidden || has_capability('moodle/grade:viewhidden', context_course::instance($course->id))) { 421 $gradeinfo .= get_string('gradeforwholeforum', 'forum', $grade) . html_writer::empty_tag('br'); 422 } else { 423 $gradeinfo .= get_string('gradeforwholeforumhidden', 'forum') . html_writer::empty_tag('br'); 424 } 425 } 426 427 $count = forum_count_user_posts($forum->id, $user->id); 428 if ($count && $count->postcount > 0) { 429 $info = get_string("numposts", "forum", $count->postcount); 430 $time = $count->lastpost; 431 432 if ($gradeinfo) { 433 $info .= ', ' . $gradeinfo; 434 $time = max($time, $gradetime); 435 } 436 437 return (object) [ 438 'info' => $info, 439 'time' => $time, 440 ]; 441 } else if ($gradeinfo) { 442 return (object) [ 443 'info' => $gradeinfo, 444 'time' => $gradetime, 445 ]; 446 } 447 448 return null; 449 } 450 451 452 /** 453 * @global object 454 * @global object 455 * @param object $coure 456 * @param object $user 457 * @param object $mod 458 * @param object $forum 459 */ 460 function forum_user_complete($course, $user, $mod, $forum) { 461 global $CFG, $USER; 462 require_once("$CFG->libdir/gradelib.php"); 463 464 $getgradeinfo = function($grades, string $type) use ($course): string { 465 global $OUTPUT; 466 467 if (empty($grades)) { 468 return ''; 469 } 470 471 $result = ''; 472 $grade = reset($grades); 473 if (!$grade->hidden || has_capability('moodle/grade:viewhidden', context_course::instance($course->id))) { 474 $result .= $OUTPUT->container(get_string("gradefor{$type}", "forum", $grade)); 475 if ($grade->str_feedback) { 476 $result .= $OUTPUT->container(get_string('feedback').': '.$grade->str_feedback); 477 } 478 } else { 479 $result .= $OUTPUT->container(get_string("gradefor{$type}hidden", "forum")); 480 } 481 482 return $result; 483 }; 484 485 $grades = grade_get_grades($course->id, 'mod', 'forum', $forum->id, $user->id); 486 487 // Item 0 is the rating. 488 if (!empty($grades->items[0]->grades)) { 489 echo $getgradeinfo($grades->items[0]->grades, 'rating'); 490 } 491 492 // Item 1 is the whole-forum grade. 493 if (!empty($grades->items[1]->grades)) { 494 echo $getgradeinfo($grades->items[1]->grades, 'wholeforum'); 495 } 496 497 if ($posts = forum_get_user_posts($forum->id, $user->id)) { 498 if (!$cm = get_coursemodule_from_instance('forum', $forum->id, $course->id)) { 499 print_error('invalidcoursemodule'); 500 } 501 $context = context_module::instance($cm->id); 502 $discussions = forum_get_user_involved_discussions($forum->id, $user->id); 503 $posts = array_filter($posts, function($post) use ($discussions) { 504 return isset($discussions[$post->discussion]); 505 }); 506 $entityfactory = mod_forum\local\container::get_entity_factory(); 507 $rendererfactory = mod_forum\local\container::get_renderer_factory(); 508 $postrenderer = $rendererfactory->get_posts_renderer(); 509 510 echo $postrenderer->render( 511 $USER, 512 [$forum->id => $entityfactory->get_forum_from_stdclass($forum, $context, $cm, $course)], 513 array_map(function($discussion) use ($entityfactory) { 514 return $entityfactory->get_discussion_from_stdclass($discussion); 515 }, $discussions), 516 array_map(function($post) use ($entityfactory) { 517 return $entityfactory->get_post_from_stdclass($post); 518 }, $posts) 519 ); 520 } else { 521 echo "<p>".get_string("noposts", "forum")."</p>"; 522 } 523 } 524 525 /** 526 * @deprecated since Moodle 3.3, when the block_course_overview block was removed. 527 */ 528 function forum_filter_user_groups_discussions() { 529 throw new coding_exception('forum_filter_user_groups_discussions() can not be used any more and is obsolete.'); 530 } 531 532 /** 533 * Returns whether the discussion group is visible by the current user or not. 534 * 535 * @since Moodle 2.8, 2.7.1, 2.6.4 536 * @param cm_info $cm The discussion course module 537 * @param int $discussiongroupid The discussion groupid 538 * @return bool 539 */ 540 function forum_is_user_group_discussion(cm_info $cm, $discussiongroupid) { 541 542 if ($discussiongroupid == -1 || $cm->effectivegroupmode != SEPARATEGROUPS) { 543 return true; 544 } 545 546 if (isguestuser()) { 547 return false; 548 } 549 550 if (has_capability('moodle/site:accessallgroups', context_module::instance($cm->id)) || 551 in_array($discussiongroupid, $cm->get_modinfo()->get_groups($cm->groupingid))) { 552 return true; 553 } 554 555 return false; 556 } 557 558 /** 559 * @deprecated since Moodle 3.3, when the block_course_overview block was removed. 560 */ 561 function forum_print_overview() { 562 throw new coding_exception('forum_print_overview() can not be used any more and is obsolete.'); 563 } 564 565 /** 566 * Given a course and a date, prints a summary of all the new 567 * messages posted in the course since that date 568 * 569 * @global object 570 * @global object 571 * @global object 572 * @uses CONTEXT_MODULE 573 * @uses VISIBLEGROUPS 574 * @param object $course 575 * @param bool $viewfullnames capability 576 * @param int $timestart 577 * @return bool success 578 */ 579 function forum_print_recent_activity($course, $viewfullnames, $timestart) { 580 global $USER, $DB, $OUTPUT; 581 582 // do not use log table if possible, it may be huge and is expensive to join with other tables 583 584 $userfieldsapi = \core_user\fields::for_userpic(); 585 $allnamefields = $userfieldsapi->get_sql('u', false, '', 'duserid', false)->selects; 586 if (!$posts = $DB->get_records_sql("SELECT p.*, 587 f.course, f.type AS forumtype, f.name AS forumname, f.intro, f.introformat, f.duedate, 588 f.cutoffdate, f.assessed AS forumassessed, f.assesstimestart, f.assesstimefinish, 589 f.scale, f.grade_forum, f.maxbytes, f.maxattachments, f.forcesubscribe, 590 f.trackingtype, f.rsstype, f.rssarticles, f.timemodified, f.warnafter, f.blockafter, 591 f.blockperiod, f.completiondiscussions, f.completionreplies, f.completionposts, 592 f.displaywordcount, f.lockdiscussionafter, f.grade_forum_notify, 593 d.name AS discussionname, d.firstpost, d.userid AS discussionstarter, 594 d.assessed AS discussionassessed, d.timemodified, d.usermodified, d.forum, d.groupid, 595 d.timestart, d.timeend, d.pinned, d.timelocked, 596 $allnamefields 597 FROM {forum_posts} p 598 JOIN {forum_discussions} d ON d.id = p.discussion 599 JOIN {forum} f ON f.id = d.forum 600 JOIN {user} u ON u.id = p.userid 601 WHERE p.created > ? AND f.course = ? AND p.deleted <> 1 602 ORDER BY p.id ASC", array($timestart, $course->id))) { // order by initial posting date 603 return false; 604 } 605 606 $modinfo = get_fast_modinfo($course); 607 608 $strftimerecent = get_string('strftimerecent'); 609 610 $managerfactory = mod_forum\local\container::get_manager_factory(); 611 $entityfactory = mod_forum\local\container::get_entity_factory(); 612 613 $discussions = []; 614 $capmanagers = []; 615 $printposts = []; 616 foreach ($posts as $post) { 617 if (!isset($modinfo->instances['forum'][$post->forum])) { 618 // not visible 619 continue; 620 } 621 $cm = $modinfo->instances['forum'][$post->forum]; 622 if (!$cm->uservisible) { 623 continue; 624 } 625 626 // Get the discussion. Cache if not yet available. 627 if (!isset($discussions[$post->discussion])) { 628 // Build the discussion record object from the post data. 629 $discussionrecord = (object)[ 630 'id' => $post->discussion, 631 'course' => $post->course, 632 'forum' => $post->forum, 633 'name' => $post->discussionname, 634 'firstpost' => $post->firstpost, 635 'userid' => $post->discussionstarter, 636 'groupid' => $post->groupid, 637 'assessed' => $post->discussionassessed, 638 'timemodified' => $post->timemodified, 639 'usermodified' => $post->usermodified, 640 'timestart' => $post->timestart, 641 'timeend' => $post->timeend, 642 'pinned' => $post->pinned, 643 'timelocked' => $post->timelocked 644 ]; 645 // Build the discussion entity from the factory and cache it. 646 $discussions[$post->discussion] = $entityfactory->get_discussion_from_stdclass($discussionrecord); 647 } 648 $discussionentity = $discussions[$post->discussion]; 649 650 // Get the capability manager. Cache if not yet available. 651 if (!isset($capmanagers[$post->forum])) { 652 $context = context_module::instance($cm->id); 653 $coursemodule = $cm->get_course_module_record(); 654 // Build the forum record object from the post data. 655 $forumrecord = (object)[ 656 'id' => $post->forum, 657 'course' => $post->course, 658 'type' => $post->forumtype, 659 'name' => $post->forumname, 660 'intro' => $post->intro, 661 'introformat' => $post->introformat, 662 'duedate' => $post->duedate, 663 'cutoffdate' => $post->cutoffdate, 664 'assessed' => $post->forumassessed, 665 'assesstimestart' => $post->assesstimestart, 666 'assesstimefinish' => $post->assesstimefinish, 667 'scale' => $post->scale, 668 'grade_forum' => $post->grade_forum, 669 'maxbytes' => $post->maxbytes, 670 'maxattachments' => $post->maxattachments, 671 'forcesubscribe' => $post->forcesubscribe, 672 'trackingtype' => $post->trackingtype, 673 'rsstype' => $post->rsstype, 674 'rssarticles' => $post->rssarticles, 675 'timemodified' => $post->timemodified, 676 'warnafter' => $post->warnafter, 677 'blockafter' => $post->blockafter, 678 'blockperiod' => $post->blockperiod, 679 'completiondiscussions' => $post->completiondiscussions, 680 'completionreplies' => $post->completionreplies, 681 'completionposts' => $post->completionposts, 682 'displaywordcount' => $post->displaywordcount, 683 'lockdiscussionafter' => $post->lockdiscussionafter, 684 'grade_forum_notify' => $post->grade_forum_notify 685 ]; 686 // Build the forum entity from the factory. 687 $forumentity = $entityfactory->get_forum_from_stdclass($forumrecord, $context, $coursemodule, $course); 688 // Get the capability manager of this forum and cache it. 689 $capmanagers[$post->forum] = $managerfactory->get_capability_manager($forumentity); 690 } 691 $capabilitymanager = $capmanagers[$post->forum]; 692 693 // Get the post entity. 694 $postentity = $entityfactory->get_post_from_stdclass($post); 695 696 // Check if the user can view the post. 697 if ($capabilitymanager->can_view_post($USER, $discussionentity, $postentity)) { 698 $printposts[] = $post; 699 } 700 } 701 unset($posts); 702 703 if (!$printposts) { 704 return false; 705 } 706 707 echo $OUTPUT->heading(get_string('newforumposts', 'forum') . ':', 6); 708 $list = html_writer::start_tag('ul', ['class' => 'unlist']); 709 710 foreach ($printposts as $post) { 711 $subjectclass = empty($post->parent) ? ' bold' : ''; 712 $authorhidden = forum_is_author_hidden($post, (object) ['type' => $post->forumtype]); 713 714 $list .= html_writer::start_tag('li'); 715 $list .= html_writer::start_div('head'); 716 $list .= html_writer::div(userdate_htmltime($post->modified, $strftimerecent), 'date'); 717 if (!$authorhidden) { 718 $list .= html_writer::div(fullname($post, $viewfullnames), 'name'); 719 } 720 $list .= html_writer::end_div(); // Head. 721 722 $list .= html_writer::start_div('info' . $subjectclass); 723 $discussionurl = new moodle_url('/mod/forum/discuss.php', ['d' => $post->discussion]); 724 if (!empty($post->parent)) { 725 $discussionurl->param('parent', $post->parent); 726 $discussionurl->set_anchor('p'. $post->id); 727 } 728 $post->subject = break_up_long_words(format_string($post->subject, true)); 729 $list .= html_writer::link($discussionurl, $post->subject, ['rel' => 'bookmark']); 730 $list .= html_writer::end_div(); // Info. 731 $list .= html_writer::end_tag('li'); 732 } 733 734 $list .= html_writer::end_tag('ul'); 735 echo $list; 736 737 return true; 738 } 739 740 /** 741 * Update activity grades. 742 * 743 * @param object $forum 744 * @param int $userid specific user only, 0 means all 745 */ 746 function forum_update_grades($forum, $userid = 0): void { 747 global $CFG, $DB; 748 require_once($CFG->libdir.'/gradelib.php'); 749 750 $ratings = null; 751 if ($forum->assessed) { 752 require_once($CFG->dirroot.'/rating/lib.php'); 753 754 $cm = get_coursemodule_from_instance('forum', $forum->id); 755 756 $rm = new rating_manager(); 757 $ratings = $rm->get_user_grades((object) [ 758 'component' => 'mod_forum', 759 'ratingarea' => 'post', 760 'contextid' => \context_module::instance($cm->id)->id, 761 762 'modulename' => 'forum', 763 'moduleid ' => $forum->id, 764 'userid' => $userid, 765 'aggregationmethod' => $forum->assessed, 766 'scaleid' => $forum->scale, 767 'itemtable' => 'forum_posts', 768 'itemtableusercolumn' => 'userid', 769 ]); 770 } 771 772 $forumgrades = null; 773 if ($forum->grade_forum) { 774 $sql = <<<EOF 775 SELECT 776 g.userid, 777 0 as datesubmitted, 778 g.grade as rawgrade, 779 g.timemodified as dategraded 780 FROM {forum} f 781 JOIN {forum_grades} g ON g.forum = f.id 782 WHERE f.id = :forumid 783 EOF; 784 785 $params = [ 786 'forumid' => $forum->id, 787 ]; 788 789 if ($userid) { 790 $sql .= " AND g.userid = :userid"; 791 $params['userid'] = $userid; 792 } 793 794 $forumgrades = []; 795 if ($grades = $DB->get_recordset_sql($sql, $params)) { 796 foreach ($grades as $userid => $grade) { 797 if ($grade->rawgrade != -1) { 798 $forumgrades[$userid] = $grade; 799 } 800 } 801 $grades->close(); 802 } 803 } 804 805 forum_grade_item_update($forum, $ratings, $forumgrades); 806 } 807 808 /** 809 * Create/update grade items for given forum. 810 * 811 * @param stdClass $forum Forum object with extra cmidnumber 812 * @param mixed $grades Optional array/object of grade(s); 'reset' means reset grades in gradebook 813 */ 814 function forum_grade_item_update($forum, $ratings = null, $forumgrades = null): void { 815 global $CFG; 816 require_once("{$CFG->libdir}/gradelib.php"); 817 818 // Update the rating. 819 $item = [ 820 'itemname' => get_string('gradeitemnameforrating', 'forum', $forum), 821 'idnumber' => $forum->cmidnumber, 822 ]; 823 824 if (!$forum->assessed || $forum->scale == 0) { 825 $item['gradetype'] = GRADE_TYPE_NONE; 826 } else if ($forum->scale > 0) { 827 $item['gradetype'] = GRADE_TYPE_VALUE; 828 $item['grademax'] = $forum->scale; 829 $item['grademin'] = 0; 830 } else if ($forum->scale < 0) { 831 $item['gradetype'] = GRADE_TYPE_SCALE; 832 $item['scaleid'] = -$forum->scale; 833 } 834 835 if ($ratings === 'reset') { 836 $item['reset'] = true; 837 $ratings = null; 838 } 839 // Itemnumber 0 is the rating. 840 grade_update('mod/forum', $forum->course, 'mod', 'forum', $forum->id, 0, $ratings, $item); 841 842 // Whole forum grade. 843 $item = [ 844 'itemname' => get_string('gradeitemnameforwholeforum', 'forum', $forum), 845 // Note: We do not need to store the idnumber here. 846 ]; 847 848 if (!$forum->grade_forum) { 849 $item['gradetype'] = GRADE_TYPE_NONE; 850 } else if ($forum->grade_forum > 0) { 851 $item['gradetype'] = GRADE_TYPE_VALUE; 852 $item['grademax'] = $forum->grade_forum; 853 $item['grademin'] = 0; 854 } else if ($forum->grade_forum < 0) { 855 $item['gradetype'] = GRADE_TYPE_SCALE; 856 $item['scaleid'] = $forum->grade_forum * -1; 857 } 858 859 if ($forumgrades === 'reset') { 860 $item['reset'] = true; 861 $forumgrades = null; 862 } 863 // Itemnumber 1 is the whole forum grade. 864 grade_update('mod/forum', $forum->course, 'mod', 'forum', $forum->id, 1, $forumgrades, $item); 865 } 866 867 /** 868 * Delete grade item for given forum. 869 * 870 * @param stdClass $forum Forum object 871 */ 872 function forum_grade_item_delete($forum) { 873 global $CFG; 874 require_once($CFG->libdir.'/gradelib.php'); 875 876 grade_update('mod/forum', $forum->course, 'mod', 'forum', $forum->id, 0, null, ['deleted' => 1]); 877 grade_update('mod/forum', $forum->course, 'mod', 'forum', $forum->id, 1, null, ['deleted' => 1]); 878 } 879 880 /** 881 * Checks if scale is being used by any instance of forum. 882 * 883 * This is used to find out if scale used anywhere. 884 * 885 * @param $scaleid int 886 * @return boolean True if the scale is used by any forum 887 */ 888 function forum_scale_used_anywhere(int $scaleid): bool { 889 global $DB; 890 891 if (empty($scaleid)) { 892 return false; 893 } 894 895 return $DB->record_exists_select('forum', "scale = ? and assessed > 0", [$scaleid * -1]); 896 } 897 898 // SQL FUNCTIONS /////////////////////////////////////////////////////////// 899 900 /** 901 * Gets a post with all info ready for forum_print_post 902 * Most of these joins are just to get the forum id 903 * 904 * @global object 905 * @global object 906 * @param int $postid 907 * @return mixed array of posts or false 908 */ 909 function forum_get_post_full($postid) { 910 global $CFG, $DB; 911 912 $userfieldsapi = \core_user\fields::for_name(); 913 $allnames = $userfieldsapi->get_sql('u', false, '', '', false)->selects; 914 return $DB->get_record_sql("SELECT p.*, d.forum, $allnames, u.email, u.picture, u.imagealt 915 FROM {forum_posts} p 916 JOIN {forum_discussions} d ON p.discussion = d.id 917 LEFT JOIN {user} u ON p.userid = u.id 918 WHERE p.id = ?", array($postid)); 919 } 920 921 /** 922 * Gets all posts in discussion including top parent. 923 * 924 * @param int $discussionid The Discussion to fetch. 925 * @param string $sort The sorting to apply. 926 * @param bool $tracking Whether the user tracks this forum. 927 * @return array The posts in the discussion. 928 */ 929 function forum_get_all_discussion_posts($discussionid, $sort, $tracking = false) { 930 global $CFG, $DB, $USER; 931 932 $tr_sel = ""; 933 $tr_join = ""; 934 $params = array(); 935 936 if ($tracking) { 937 $tr_sel = ", fr.id AS postread"; 938 $tr_join = "LEFT JOIN {forum_read} fr ON (fr.postid = p.id AND fr.userid = ?)"; 939 $params[] = $USER->id; 940 } 941 942 $userfieldsapi = \core_user\fields::for_name(); 943 $allnames = $userfieldsapi->get_sql('u', false, '', '', false)->selects; 944 $params[] = $discussionid; 945 if (!$posts = $DB->get_records_sql("SELECT p.*, $allnames, u.email, u.picture, u.imagealt $tr_sel 946 FROM {forum_posts} p 947 LEFT JOIN {user} u ON p.userid = u.id 948 $tr_join 949 WHERE p.discussion = ? 950 ORDER BY $sort", $params)) { 951 return array(); 952 } 953 954 foreach ($posts as $pid=>$p) { 955 if ($tracking) { 956 if (forum_tp_is_post_old($p)) { 957 $posts[$pid]->postread = true; 958 } 959 } 960 if (!$p->parent) { 961 continue; 962 } 963 if (!isset($posts[$p->parent])) { 964 continue; // parent does not exist?? 965 } 966 if (!isset($posts[$p->parent]->children)) { 967 $posts[$p->parent]->children = array(); 968 } 969 $posts[$p->parent]->children[$pid] =& $posts[$pid]; 970 } 971 972 // Start with the last child of the first post. 973 $post = &$posts[reset($posts)->id]; 974 975 $lastpost = false; 976 while (!$lastpost) { 977 if (!isset($post->children)) { 978 $post->lastpost = true; 979 $lastpost = true; 980 } else { 981 // Go to the last child of this post. 982 $post = &$posts[end($post->children)->id]; 983 } 984 } 985 986 return $posts; 987 } 988 989 /** 990 * An array of forum objects that the user is allowed to read/search through. 991 * 992 * @global object 993 * @global object 994 * @global object 995 * @param int $userid 996 * @param int $courseid if 0, we look for forums throughout the whole site. 997 * @return array of forum objects, or false if no matches 998 * Forum objects have the following attributes: 999 * id, type, course, cmid, cmvisible, cmgroupmode, accessallgroups, 1000 * viewhiddentimedposts 1001 */ 1002 function forum_get_readable_forums($userid, $courseid=0) { 1003 1004 global $CFG, $DB, $USER; 1005 require_once($CFG->dirroot.'/course/lib.php'); 1006 1007 if (!$forummod = $DB->get_record('modules', array('name' => 'forum'))) { 1008 print_error('notinstalled', 'forum'); 1009 } 1010 1011 if ($courseid) { 1012 $courses = $DB->get_records('course', array('id' => $courseid)); 1013 } else { 1014 // If no course is specified, then the user can see SITE + his courses. 1015 $courses1 = $DB->get_records('course', array('id' => SITEID)); 1016 $courses2 = enrol_get_users_courses($userid, true, array('modinfo')); 1017 $courses = array_merge($courses1, $courses2); 1018 } 1019 if (!$courses) { 1020 return array(); 1021 } 1022 1023 $readableforums = array(); 1024 1025 foreach ($courses as $course) { 1026 1027 $modinfo = get_fast_modinfo($course); 1028 1029 if (empty($modinfo->instances['forum'])) { 1030 // hmm, no forums? 1031 continue; 1032 } 1033 1034 $courseforums = $DB->get_records('forum', array('course' => $course->id)); 1035 1036 foreach ($modinfo->instances['forum'] as $forumid => $cm) { 1037 if (!$cm->uservisible or !isset($courseforums[$forumid])) { 1038 continue; 1039 } 1040 $context = context_module::instance($cm->id); 1041 $forum = $courseforums[$forumid]; 1042 $forum->context = $context; 1043 $forum->cm = $cm; 1044 1045 if (!has_capability('mod/forum:viewdiscussion', $context)) { 1046 continue; 1047 } 1048 1049 /// group access 1050 if (groups_get_activity_groupmode($cm, $course) == SEPARATEGROUPS and !has_capability('moodle/site:accessallgroups', $context)) { 1051 1052 $forum->onlygroups = $modinfo->get_groups($cm->groupingid); 1053 $forum->onlygroups[] = -1; 1054 } 1055 1056 /// hidden timed discussions 1057 $forum->viewhiddentimedposts = true; 1058 if (!empty($CFG->forum_enabletimedposts)) { 1059 if (!has_capability('mod/forum:viewhiddentimedposts', $context)) { 1060 $forum->viewhiddentimedposts = false; 1061 } 1062 } 1063 1064 /// qanda access 1065 if ($forum->type == 'qanda' 1066 && !has_capability('mod/forum:viewqandawithoutposting', $context)) { 1067 1068 // We need to check whether the user has posted in the qanda forum. 1069 $forum->onlydiscussions = array(); // Holds discussion ids for the discussions 1070 // the user is allowed to see in this forum. 1071 if ($discussionspostedin = forum_discussions_user_has_posted_in($forum->id, $USER->id)) { 1072 foreach ($discussionspostedin as $d) { 1073 $forum->onlydiscussions[] = $d->id; 1074 } 1075 } 1076 } 1077 1078 $readableforums[$forum->id] = $forum; 1079 } 1080 1081 unset($modinfo); 1082 1083 } // End foreach $courses 1084 1085 return $readableforums; 1086 } 1087 1088 /** 1089 * Returns a list of posts found using an array of search terms. 1090 * 1091 * @global object 1092 * @global object 1093 * @global object 1094 * @param array $searchterms array of search terms, e.g. word +word -word 1095 * @param int $courseid if 0, we search through the whole site 1096 * @param int $limitfrom 1097 * @param int $limitnum 1098 * @param int &$totalcount 1099 * @param string $extrasql 1100 * @return array|bool Array of posts found or false 1101 */ 1102 function forum_search_posts($searchterms, $courseid, $limitfrom, $limitnum, 1103 &$totalcount, $extrasql='') { 1104 global $CFG, $DB, $USER; 1105 require_once($CFG->libdir.'/searchlib.php'); 1106 1107 $forums = forum_get_readable_forums($USER->id, $courseid); 1108 1109 if (count($forums) == 0) { 1110 $totalcount = 0; 1111 return false; 1112 } 1113 1114 $now = floor(time() / 60) * 60; // DB Cache Friendly. 1115 1116 $fullaccess = array(); 1117 $where = array(); 1118 $params = array(); 1119 1120 foreach ($forums as $forumid => $forum) { 1121 $select = array(); 1122 1123 if (!$forum->viewhiddentimedposts) { 1124 $select[] = "(d.userid = :userid{$forumid} OR (d.timestart < :timestart{$forumid} AND (d.timeend = 0 OR d.timeend > :timeend{$forumid})))"; 1125 $params = array_merge($params, array('userid'.$forumid=>$USER->id, 'timestart'.$forumid=>$now, 'timeend'.$forumid=>$now)); 1126 } 1127 1128 $cm = $forum->cm; 1129 $context = $forum->context; 1130 1131 if ($forum->type == 'qanda' 1132 && !has_capability('mod/forum:viewqandawithoutposting', $context)) { 1133 if (!empty($forum->onlydiscussions)) { 1134 list($discussionid_sql, $discussionid_params) = $DB->get_in_or_equal($forum->onlydiscussions, SQL_PARAMS_NAMED, 'qanda'.$forumid.'_'); 1135 $params = array_merge($params, $discussionid_params); 1136 $select[] = "(d.id $discussionid_sql OR p.parent = 0)"; 1137 } else { 1138 $select[] = "p.parent = 0"; 1139 } 1140 } 1141 1142 if (!empty($forum->onlygroups)) { 1143 list($groupid_sql, $groupid_params) = $DB->get_in_or_equal($forum->onlygroups, SQL_PARAMS_NAMED, 'grps'.$forumid.'_'); 1144 $params = array_merge($params, $groupid_params); 1145 $select[] = "d.groupid $groupid_sql"; 1146 } 1147 1148 if ($select) { 1149 $selects = implode(" AND ", $select); 1150 $where[] = "(d.forum = :forum{$forumid} AND $selects)"; 1151 $params['forum'.$forumid] = $forumid; 1152 } else { 1153 $fullaccess[] = $forumid; 1154 } 1155 } 1156 1157 if ($fullaccess) { 1158 list($fullid_sql, $fullid_params) = $DB->get_in_or_equal($fullaccess, SQL_PARAMS_NAMED, 'fula'); 1159 $params = array_merge($params, $fullid_params); 1160 $where[] = "(d.forum $fullid_sql)"; 1161 } 1162 1163 $favjoin = ""; 1164 if (in_array('starredonly:on', $searchterms)) { 1165 $usercontext = context_user::instance($USER->id); 1166 $ufservice = \core_favourites\service_factory::get_service_for_user_context($usercontext); 1167 list($favjoin, $favparams) = $ufservice->get_join_sql_by_type('mod_forum', 'discussions', 1168 "favourited", "d.id"); 1169 1170 $searchterms = array_values(array_diff($searchterms, array('starredonly:on'))); 1171 $params = array_merge($params, $favparams); 1172 $extrasql .= " AND favourited.itemid IS NOT NULL AND favourited.itemid != 0"; 1173 } 1174 1175 $selectdiscussion = "(".implode(" OR ", $where).")"; 1176 1177 $messagesearch = ''; 1178 $searchstring = ''; 1179 1180 // Need to concat these back together for parser to work. 1181 foreach($searchterms as $searchterm){ 1182 if ($searchstring != '') { 1183 $searchstring .= ' '; 1184 } 1185 $searchstring .= $searchterm; 1186 } 1187 1188 // We need to allow quoted strings for the search. The quotes *should* be stripped 1189 // by the parser, but this should be examined carefully for security implications. 1190 $searchstring = str_replace("\\\"","\"",$searchstring); 1191 $parser = new search_parser(); 1192 $lexer = new search_lexer($parser); 1193 1194 if ($lexer->parse($searchstring)) { 1195 $parsearray = $parser->get_parsed_array(); 1196 1197 $tagjoins = ''; 1198 $tagfields = []; 1199 $tagfieldcount = 0; 1200 if ($parsearray) { 1201 foreach ($parsearray as $token) { 1202 if ($token->getType() == TOKEN_TAGS) { 1203 for ($i = 0; $i <= substr_count($token->getValue(), ','); $i++) { 1204 // Queries can only have a limited number of joins so set a limit sensible users won't exceed. 1205 if ($tagfieldcount > 10) { 1206 continue; 1207 } 1208 $tagjoins .= " LEFT JOIN {tag_instance} ti_$tagfieldcount 1209 ON p.id = ti_$tagfieldcount.itemid 1210 AND ti_$tagfieldcount.component = 'mod_forum' 1211 AND ti_$tagfieldcount.itemtype = 'forum_posts'"; 1212 $tagjoins .= " LEFT JOIN {tag} t_$tagfieldcount ON t_$tagfieldcount.id = ti_$tagfieldcount.tagid"; 1213 $tagfields[] = "t_$tagfieldcount.rawname"; 1214 $tagfieldcount++; 1215 } 1216 } 1217 } 1218 list($messagesearch, $msparams) = search_generate_SQL($parsearray, 'p.message', 'p.subject', 1219 'p.userid', 'u.id', 'u.firstname', 1220 'u.lastname', 'p.modified', 'd.forum', 1221 $tagfields); 1222 1223 $params = ($msparams ? array_merge($params, $msparams) : $params); 1224 } 1225 } 1226 1227 $fromsql = "{forum_posts} p 1228 INNER JOIN {forum_discussions} d ON d.id = p.discussion 1229 INNER JOIN {user} u ON u.id = p.userid $tagjoins $favjoin"; 1230 1231 $selectsql = ($messagesearch ? $messagesearch . " AND " : ""). 1232 " p.discussion = d.id 1233 AND p.userid = u.id 1234 AND $selectdiscussion 1235 $extrasql"; 1236 1237 $countsql = "SELECT COUNT(*) 1238 FROM $fromsql 1239 WHERE $selectsql"; 1240 1241 $userfieldsapi = \core_user\fields::for_name(); 1242 $allnames = $userfieldsapi->get_sql('u', false, '', '', false)->selects; 1243 $searchsql = "SELECT p.*, 1244 d.forum, 1245 $allnames, 1246 u.email, 1247 u.picture, 1248 u.imagealt 1249 FROM $fromsql 1250 WHERE $selectsql 1251 ORDER BY p.modified DESC"; 1252 1253 $totalcount = $DB->count_records_sql($countsql, $params); 1254 1255 return $DB->get_records_sql($searchsql, $params, $limitfrom, $limitnum); 1256 } 1257 1258 /** 1259 * Get all the posts for a user in a forum suitable for forum_print_post 1260 * 1261 * @global object 1262 * @global object 1263 * @uses CONTEXT_MODULE 1264 * @return array 1265 */ 1266 function forum_get_user_posts($forumid, $userid) { 1267 global $CFG, $DB; 1268 1269 $timedsql = ""; 1270 $params = array($forumid, $userid); 1271 1272 if (!empty($CFG->forum_enabletimedposts)) { 1273 $cm = get_coursemodule_from_instance('forum', $forumid); 1274 if (!has_capability('mod/forum:viewhiddentimedposts' , context_module::instance($cm->id))) { 1275 $now = time(); 1276 $timedsql = "AND (d.timestart < ? AND (d.timeend = 0 OR d.timeend > ?))"; 1277 $params[] = $now; 1278 $params[] = $now; 1279 } 1280 } 1281 1282 $userfieldsapi = \core_user\fields::for_name(); 1283 $allnames = $userfieldsapi->get_sql('u', false, '', '', false)->selects; 1284 return $DB->get_records_sql("SELECT p.*, d.forum, $allnames, u.email, u.picture, u.imagealt 1285 FROM {forum} f 1286 JOIN {forum_discussions} d ON d.forum = f.id 1287 JOIN {forum_posts} p ON p.discussion = d.id 1288 JOIN {user} u ON u.id = p.userid 1289 WHERE f.id = ? 1290 AND p.userid = ? 1291 $timedsql 1292 ORDER BY p.modified ASC", $params); 1293 } 1294 1295 /** 1296 * Get all the discussions user participated in 1297 * 1298 * @global object 1299 * @global object 1300 * @uses CONTEXT_MODULE 1301 * @param int $forumid 1302 * @param int $userid 1303 * @return array Array or false 1304 */ 1305 function forum_get_user_involved_discussions($forumid, $userid) { 1306 global $CFG, $DB; 1307 1308 $timedsql = ""; 1309 $params = array($forumid, $userid); 1310 if (!empty($CFG->forum_enabletimedposts)) { 1311 $cm = get_coursemodule_from_instance('forum', $forumid); 1312 if (!has_capability('mod/forum:viewhiddentimedposts' , context_module::instance($cm->id))) { 1313 $now = time(); 1314 $timedsql = "AND (d.timestart < ? AND (d.timeend = 0 OR d.timeend > ?))"; 1315 $params[] = $now; 1316 $params[] = $now; 1317 } 1318 } 1319 1320 return $DB->get_records_sql("SELECT DISTINCT d.* 1321 FROM {forum} f 1322 JOIN {forum_discussions} d ON d.forum = f.id 1323 JOIN {forum_posts} p ON p.discussion = d.id 1324 WHERE f.id = ? 1325 AND p.userid = ? 1326 $timedsql", $params); 1327 } 1328 1329 /** 1330 * Get all the posts for a user in a forum suitable for forum_print_post 1331 * 1332 * @global object 1333 * @global object 1334 * @param int $forumid 1335 * @param int $userid 1336 * @return array of counts or false 1337 */ 1338 function forum_count_user_posts($forumid, $userid) { 1339 global $CFG, $DB; 1340 1341 $timedsql = ""; 1342 $params = array($forumid, $userid); 1343 if (!empty($CFG->forum_enabletimedposts)) { 1344 $cm = get_coursemodule_from_instance('forum', $forumid); 1345 if (!has_capability('mod/forum:viewhiddentimedposts' , context_module::instance($cm->id))) { 1346 $now = time(); 1347 $timedsql = "AND (d.timestart < ? AND (d.timeend = 0 OR d.timeend > ?))"; 1348 $params[] = $now; 1349 $params[] = $now; 1350 } 1351 } 1352 1353 return $DB->get_record_sql("SELECT COUNT(p.id) AS postcount, MAX(p.modified) AS lastpost 1354 FROM {forum} f 1355 JOIN {forum_discussions} d ON d.forum = f.id 1356 JOIN {forum_posts} p ON p.discussion = d.id 1357 JOIN {user} u ON u.id = p.userid 1358 WHERE f.id = ? 1359 AND p.userid = ? 1360 $timedsql", $params); 1361 } 1362 1363 /** 1364 * Given a log entry, return the forum post details for it. 1365 * 1366 * @global object 1367 * @global object 1368 * @param object $log 1369 * @return array|null 1370 */ 1371 function forum_get_post_from_log($log) { 1372 global $CFG, $DB; 1373 1374 $userfieldsapi = \core_user\fields::for_name(); 1375 $allnames = $userfieldsapi->get_sql('u', false, '', '', false)->selects; 1376 if ($log->action == "add post") { 1377 1378 return $DB->get_record_sql("SELECT p.*, f.type AS forumtype, d.forum, d.groupid, $allnames, u.email, u.picture 1379 FROM {forum_discussions} d, 1380 {forum_posts} p, 1381 {forum} f, 1382 {user} u 1383 WHERE p.id = ? 1384 AND d.id = p.discussion 1385 AND p.userid = u.id 1386 AND u.deleted <> '1' 1387 AND f.id = d.forum", array($log->info)); 1388 1389 1390 } else if ($log->action == "add discussion") { 1391 1392 return $DB->get_record_sql("SELECT p.*, f.type AS forumtype, d.forum, d.groupid, $allnames, u.email, u.picture 1393 FROM {forum_discussions} d, 1394 {forum_posts} p, 1395 {forum} f, 1396 {user} u 1397 WHERE d.id = ? 1398 AND d.firstpost = p.id 1399 AND p.userid = u.id 1400 AND u.deleted <> '1' 1401 AND f.id = d.forum", array($log->info)); 1402 } 1403 return NULL; 1404 } 1405 1406 /** 1407 * Given a discussion id, return the first post from the discussion 1408 * 1409 * @global object 1410 * @global object 1411 * @param int $dicsussionid 1412 * @return array 1413 */ 1414 function forum_get_firstpost_from_discussion($discussionid) { 1415 global $CFG, $DB; 1416 1417 return $DB->get_record_sql("SELECT p.* 1418 FROM {forum_discussions} d, 1419 {forum_posts} p 1420 WHERE d.id = ? 1421 AND d.firstpost = p.id ", array($discussionid)); 1422 } 1423 1424 /** 1425 * Returns an array of counts of replies to each discussion 1426 * 1427 * @param int $forumid 1428 * @param string $forumsort 1429 * @param int $limit 1430 * @param int $page 1431 * @param int $perpage 1432 * @param boolean $canseeprivatereplies Whether the current user can see private replies. 1433 * @return array 1434 */ 1435 function forum_count_discussion_replies($forumid, $forumsort = "", $limit = -1, $page = -1, $perpage = 0, 1436 $canseeprivatereplies = false) { 1437 global $CFG, $DB, $USER; 1438 1439 if ($limit > 0) { 1440 $limitfrom = 0; 1441 $limitnum = $limit; 1442 } else if ($page != -1) { 1443 $limitfrom = $page*$perpage; 1444 $limitnum = $perpage; 1445 } else { 1446 $limitfrom = 0; 1447 $limitnum = 0; 1448 } 1449 1450 if ($forumsort == "") { 1451 $orderby = ""; 1452 $groupby = ""; 1453 1454 } else { 1455 $orderby = "ORDER BY $forumsort"; 1456 $groupby = ", ".strtolower($forumsort); 1457 $groupby = str_replace('desc', '', $groupby); 1458 $groupby = str_replace('asc', '', $groupby); 1459 } 1460 1461 $params = ['forumid' => $forumid]; 1462 1463 if (!$canseeprivatereplies) { 1464 $privatewhere = ' AND (p.privatereplyto = :currentuser1 OR p.userid = :currentuser2 OR p.privatereplyto = 0)'; 1465 $params['currentuser1'] = $USER->id; 1466 $params['currentuser2'] = $USER->id; 1467 } else { 1468 $privatewhere = ''; 1469 } 1470 1471 if (($limitfrom == 0 and $limitnum == 0) or $forumsort == "") { 1472 $sql = "SELECT p.discussion, COUNT(p.id) AS replies, MAX(p.id) AS lastpostid 1473 FROM {forum_posts} p 1474 JOIN {forum_discussions} d ON p.discussion = d.id 1475 WHERE p.parent > 0 AND d.forum = :forumid 1476 $privatewhere 1477 GROUP BY p.discussion"; 1478 return $DB->get_records_sql($sql, $params); 1479 1480 } else { 1481 $sql = "SELECT p.discussion, (COUNT(p.id) - 1) AS replies, MAX(p.id) AS lastpostid 1482 FROM {forum_posts} p 1483 JOIN {forum_discussions} d ON p.discussion = d.id 1484 WHERE d.forum = :forumid 1485 $privatewhere 1486 GROUP BY p.discussion $groupby $orderby"; 1487 return $DB->get_records_sql($sql, $params, $limitfrom, $limitnum); 1488 } 1489 } 1490 1491 /** 1492 * @global object 1493 * @global object 1494 * @global object 1495 * @staticvar array $cache 1496 * @param object $forum 1497 * @param object $cm 1498 * @param object $course 1499 * @return mixed 1500 */ 1501 function forum_count_discussions($forum, $cm, $course) { 1502 global $CFG, $DB, $USER; 1503 1504 static $cache = array(); 1505 1506 $now = floor(time() / 60) * 60; // DB Cache Friendly. 1507 1508 $params = array($course->id); 1509 1510 if (!isset($cache[$course->id])) { 1511 if (!empty($CFG->forum_enabletimedposts)) { 1512 $timedsql = "AND d.timestart < ? AND (d.timeend = 0 OR d.timeend > ?)"; 1513 $params[] = $now; 1514 $params[] = $now; 1515 } else { 1516 $timedsql = ""; 1517 } 1518 1519 $sql = "SELECT f.id, COUNT(d.id) as dcount 1520 FROM {forum} f 1521 JOIN {forum_discussions} d ON d.forum = f.id 1522 WHERE f.course = ? 1523 $timedsql 1524 GROUP BY f.id"; 1525 1526 if ($counts = $DB->get_records_sql($sql, $params)) { 1527 foreach ($counts as $count) { 1528 $counts[$count->id] = $count->dcount; 1529 } 1530 $cache[$course->id] = $counts; 1531 } else { 1532 $cache[$course->id] = array(); 1533 } 1534 } 1535 1536 if (empty($cache[$course->id][$forum->id])) { 1537 return 0; 1538 } 1539 1540 $groupmode = groups_get_activity_groupmode($cm, $course); 1541 1542 if ($groupmode != SEPARATEGROUPS) { 1543 return $cache[$course->id][$forum->id]; 1544 } 1545 1546 if (has_capability('moodle/site:accessallgroups', context_module::instance($cm->id))) { 1547 return $cache[$course->id][$forum->id]; 1548 } 1549 1550 require_once($CFG->dirroot.'/course/lib.php'); 1551 1552 $modinfo = get_fast_modinfo($course); 1553 1554 $mygroups = $modinfo->get_groups($cm->groupingid); 1555 1556 // add all groups posts 1557 $mygroups[-1] = -1; 1558 1559 list($mygroups_sql, $params) = $DB->get_in_or_equal($mygroups); 1560 $params[] = $forum->id; 1561 1562 if (!empty($CFG->forum_enabletimedposts)) { 1563 $timedsql = "AND d.timestart < $now AND (d.timeend = 0 OR d.timeend > $now)"; 1564 $params[] = $now; 1565 $params[] = $now; 1566 } else { 1567 $timedsql = ""; 1568 } 1569 1570 $sql = "SELECT COUNT(d.id) 1571 FROM {forum_discussions} d 1572 WHERE d.groupid $mygroups_sql AND d.forum = ? 1573 $timedsql"; 1574 1575 return $DB->get_field_sql($sql, $params); 1576 } 1577 1578 /** 1579 * Get all discussions in a forum 1580 * 1581 * @global object 1582 * @global object 1583 * @global object 1584 * @uses CONTEXT_MODULE 1585 * @uses VISIBLEGROUPS 1586 * @param object $cm 1587 * @param string $forumsort 1588 * @param bool $fullpost 1589 * @param int $unused 1590 * @param int $limit 1591 * @param bool $userlastmodified 1592 * @param int $page 1593 * @param int $perpage 1594 * @param int $groupid if groups enabled, get discussions for this group overriding the current group. 1595 * Use FORUM_POSTS_ALL_USER_GROUPS for all the user groups 1596 * @param int $updatedsince retrieve only discussions updated since the given time 1597 * @return array 1598 */ 1599 function forum_get_discussions($cm, $forumsort="", $fullpost=true, $unused=-1, $limit=-1, 1600 $userlastmodified=false, $page=-1, $perpage=0, $groupid = -1, 1601 $updatedsince = 0) { 1602 global $CFG, $DB, $USER; 1603 1604 $timelimit = ''; 1605 1606 $now = floor(time() / 60) * 60; 1607 $params = array($cm->instance); 1608 1609 $modcontext = context_module::instance($cm->id); 1610 1611 if (!has_capability('mod/forum:viewdiscussion', $modcontext)) { /// User must have perms to view discussions 1612 return array(); 1613 } 1614 1615 if (!empty($CFG->forum_enabletimedposts)) { /// Users must fulfill timed posts 1616 1617 if (!has_capability('mod/forum:viewhiddentimedposts', $modcontext)) { 1618 $timelimit = " AND ((d.timestart <= ? AND (d.timeend = 0 OR d.timeend > ?))"; 1619 $params[] = $now; 1620 $params[] = $now; 1621 if (isloggedin()) { 1622 $timelimit .= " OR d.userid = ?"; 1623 $params[] = $USER->id; 1624 } 1625 $timelimit .= ")"; 1626 } 1627 } 1628 1629 if ($limit > 0) { 1630 $limitfrom = 0; 1631 $limitnum = $limit; 1632 } else if ($page != -1) { 1633 $limitfrom = $page*$perpage; 1634 $limitnum = $perpage; 1635 } else { 1636 $limitfrom = 0; 1637 $limitnum = 0; 1638 } 1639 1640 $groupmode = groups_get_activity_groupmode($cm); 1641 1642 if ($groupmode) { 1643 1644 if (empty($modcontext)) { 1645 $modcontext = context_module::instance($cm->id); 1646 } 1647 1648 // Special case, we received a groupid to override currentgroup. 1649 if ($groupid > 0) { 1650 $course = get_course($cm->course); 1651 if (!groups_group_visible($groupid, $course, $cm)) { 1652 // User doesn't belong to this group, return nothing. 1653 return array(); 1654 } 1655 $currentgroup = $groupid; 1656 } else if ($groupid === -1) { 1657 $currentgroup = groups_get_activity_group($cm); 1658 } else { 1659 // Get discussions for all groups current user can see. 1660 $currentgroup = null; 1661 } 1662 1663 if ($groupmode == VISIBLEGROUPS or has_capability('moodle/site:accessallgroups', $modcontext)) { 1664 if ($currentgroup) { 1665 $groupselect = "AND (d.groupid = ? OR d.groupid = -1)"; 1666 $params[] = $currentgroup; 1667 } else { 1668 $groupselect = ""; 1669 } 1670 1671 } else { 1672 // Separate groups. 1673 1674 // Get discussions for all groups current user can see. 1675 if ($currentgroup === null) { 1676 $mygroups = array_keys(groups_get_all_groups($cm->course, $USER->id, $cm->groupingid, 'g.id')); 1677 if (empty($mygroups)) { 1678 $groupselect = "AND d.groupid = -1"; 1679 } else { 1680 list($insqlgroups, $inparamsgroups) = $DB->get_in_or_equal($mygroups); 1681 $groupselect = "AND (d.groupid = -1 OR d.groupid $insqlgroups)"; 1682 $params = array_merge($params, $inparamsgroups); 1683 } 1684 } else if ($currentgroup) { 1685 $groupselect = "AND (d.groupid = ? OR d.groupid = -1)"; 1686 $params[] = $currentgroup; 1687 } else { 1688 $groupselect = "AND d.groupid = -1"; 1689 } 1690 } 1691 } else { 1692 $groupselect = ""; 1693 } 1694 if (empty($forumsort)) { 1695 $forumsort = forum_get_default_sort_order(); 1696 } 1697 if (empty($fullpost)) { 1698 $postdata = "p.id, p.subject, p.modified, p.discussion, p.userid, p.created"; 1699 } else { 1700 $postdata = "p.*"; 1701 } 1702 1703 $userfieldsapi = \core_user\fields::for_name(); 1704 1705 if (empty($userlastmodified)) { // We don't need to know this 1706 $umfields = ""; 1707 $umtable = ""; 1708 } else { 1709 $umfields = $userfieldsapi->get_sql('um', false, 'um')->selects . ', um.email AS umemail, um.picture AS umpicture, 1710 um.imagealt AS umimagealt'; 1711 $umtable = " LEFT JOIN {user} um ON (d.usermodified = um.id)"; 1712 } 1713 1714 $updatedsincesql = ''; 1715 if (!empty($updatedsince)) { 1716 $updatedsincesql = 'AND d.timemodified > ?'; 1717 $params[] = $updatedsince; 1718 } 1719 1720 $discussionfields = "d.id as discussionid, d.course, d.forum, d.name, d.firstpost, d.groupid, d.assessed," . 1721 " d.timemodified, d.usermodified, d.timestart, d.timeend, d.pinned, d.timelocked"; 1722 1723 $allnames = $userfieldsapi->get_sql('u', false, '', '', false)->selects; 1724 $sql = "SELECT $postdata, $discussionfields, 1725 $allnames, u.email, u.picture, u.imagealt $umfields 1726 FROM {forum_discussions} d 1727 JOIN {forum_posts} p ON p.discussion = d.id 1728 JOIN {user} u ON p.userid = u.id 1729 $umtable 1730 WHERE d.forum = ? AND p.parent = 0 1731 $timelimit $groupselect $updatedsincesql 1732 ORDER BY $forumsort, d.id DESC"; 1733 1734 return $DB->get_records_sql($sql, $params, $limitfrom, $limitnum); 1735 } 1736 1737 /** 1738 * Gets the neighbours (previous and next) of a discussion. 1739 * 1740 * The calculation is based on the timemodified when time modified or time created is identical 1741 * It will revert to using the ID to sort consistently. This is better tha skipping a discussion. 1742 * 1743 * For blog-style forums, the calculation is based on the original creation time of the 1744 * blog post. 1745 * 1746 * Please note that this does not check whether or not the discussion passed is accessible 1747 * by the user, it simply uses it as a reference to find the neighbours. On the other hand, 1748 * the returned neighbours are checked and are accessible to the current user. 1749 * 1750 * @param object $cm The CM record. 1751 * @param object $discussion The discussion record. 1752 * @param object $forum The forum instance record. 1753 * @return array That always contains the keys 'prev' and 'next'. When there is a result 1754 * they contain the record with minimal information such as 'id' and 'name'. 1755 * When the neighbour is not found the value is false. 1756 */ 1757 function forum_get_discussion_neighbours($cm, $discussion, $forum) { 1758 global $CFG, $DB, $USER; 1759 1760 if ($cm->instance != $discussion->forum or $discussion->forum != $forum->id or $forum->id != $cm->instance) { 1761 throw new coding_exception('Discussion is not part of the same forum.'); 1762 } 1763 1764 $neighbours = array('prev' => false, 'next' => false); 1765 $now = floor(time() / 60) * 60; 1766 $params = array(); 1767 1768 $modcontext = context_module::instance($cm->id); 1769 $groupmode = groups_get_activity_groupmode($cm); 1770 $currentgroup = groups_get_activity_group($cm); 1771 1772 // Users must fulfill timed posts. 1773 $timelimit = ''; 1774 if (!empty($CFG->forum_enabletimedposts)) { 1775 if (!has_capability('mod/forum:viewhiddentimedposts', $modcontext)) { 1776 $timelimit = ' AND ((d.timestart <= :tltimestart AND (d.timeend = 0 OR d.timeend > :tltimeend))'; 1777 $params['tltimestart'] = $now; 1778 $params['tltimeend'] = $now; 1779 if (isloggedin()) { 1780 $timelimit .= ' OR d.userid = :tluserid'; 1781 $params['tluserid'] = $USER->id; 1782 } 1783 $timelimit .= ')'; 1784 } 1785 } 1786 1787 // Limiting to posts accessible according to groups. 1788 $groupselect = ''; 1789 if ($groupmode) { 1790 if ($groupmode == VISIBLEGROUPS || has_capability('moodle/site:accessallgroups', $modcontext)) { 1791 if ($currentgroup) { 1792 $groupselect = 'AND (d.groupid = :groupid OR d.groupid = -1)'; 1793 $params['groupid'] = $currentgroup; 1794 } 1795 } else { 1796 if ($currentgroup) { 1797 $groupselect = 'AND (d.groupid = :groupid OR d.groupid = -1)'; 1798 $params['groupid'] = $currentgroup; 1799 } else { 1800 $groupselect = 'AND d.groupid = -1'; 1801 } 1802 } 1803 } 1804 1805 $params['forumid'] = $cm->instance; 1806 $params['discid1'] = $discussion->id; 1807 $params['discid2'] = $discussion->id; 1808 $params['discid3'] = $discussion->id; 1809 $params['discid4'] = $discussion->id; 1810 $params['disctimecompare1'] = $discussion->timemodified; 1811 $params['disctimecompare2'] = $discussion->timemodified; 1812 $params['pinnedstate1'] = (int) $discussion->pinned; 1813 $params['pinnedstate2'] = (int) $discussion->pinned; 1814 $params['pinnedstate3'] = (int) $discussion->pinned; 1815 $params['pinnedstate4'] = (int) $discussion->pinned; 1816 1817 $sql = "SELECT d.id, d.name, d.timemodified, d.groupid, d.timestart, d.timeend 1818 FROM {forum_discussions} d 1819 JOIN {forum_posts} p ON d.firstpost = p.id 1820 WHERE d.forum = :forumid 1821 AND d.id <> :discid1 1822 $timelimit 1823 $groupselect"; 1824 $comparefield = "d.timemodified"; 1825 $comparevalue = ":disctimecompare1"; 1826 $comparevalue2 = ":disctimecompare2"; 1827 if (!empty($CFG->forum_enabletimedposts)) { 1828 // Here we need to take into account the release time (timestart) 1829 // if one is set, of the neighbouring posts and compare it to the 1830 // timestart or timemodified of *this* post depending on if the 1831 // release date of this post is in the future or not. 1832 // This stops discussions that appear later because of the 1833 // timestart value from being buried under discussions that were 1834 // made afterwards. 1835 $comparefield = "CASE WHEN d.timemodified < d.timestart 1836 THEN d.timestart ELSE d.timemodified END"; 1837 if ($discussion->timemodified < $discussion->timestart) { 1838 // Normally we would just use the timemodified for sorting 1839 // discussion posts. However, when timed discussions are enabled, 1840 // then posts need to be sorted base on the later of timemodified 1841 // or the release date of the post (timestart). 1842 $params['disctimecompare1'] = $discussion->timestart; 1843 $params['disctimecompare2'] = $discussion->timestart; 1844 } 1845 } 1846 $orderbydesc = forum_get_default_sort_order(true, $comparefield, 'd', false); 1847 $orderbyasc = forum_get_default_sort_order(false, $comparefield, 'd', false); 1848 1849 if ($forum->type === 'blog') { 1850 $subselect = "SELECT pp.created 1851 FROM {forum_discussions} dd 1852 JOIN {forum_posts} pp ON dd.firstpost = pp.id "; 1853 1854 $subselectwhere1 = " WHERE dd.id = :discid3"; 1855 $subselectwhere2 = " WHERE dd.id = :discid4"; 1856 1857 $comparefield = "p.created"; 1858 1859 $sub1 = $subselect.$subselectwhere1; 1860 $comparevalue = "($sub1)"; 1861 1862 $sub2 = $subselect.$subselectwhere2; 1863 $comparevalue2 = "($sub2)"; 1864 1865 $orderbydesc = "d.pinned, p.created DESC"; 1866 $orderbyasc = "d.pinned, p.created ASC"; 1867 } 1868 1869 $prevsql = $sql . " AND ( (($comparefield < $comparevalue) AND :pinnedstate1 = d.pinned) 1870 OR ($comparefield = $comparevalue2 AND (d.pinned = 0 OR d.pinned = :pinnedstate4) AND d.id < :discid2) 1871 OR (d.pinned = 0 AND d.pinned <> :pinnedstate2)) 1872 ORDER BY CASE WHEN d.pinned = :pinnedstate3 THEN 1 ELSE 0 END DESC, $orderbydesc, d.id DESC"; 1873 1874 $nextsql = $sql . " AND ( (($comparefield > $comparevalue) AND :pinnedstate1 = d.pinned) 1875 OR ($comparefield = $comparevalue2 AND (d.pinned = 1 OR d.pinned = :pinnedstate4) AND d.id > :discid2) 1876 OR (d.pinned = 1 AND d.pinned <> :pinnedstate2)) 1877 ORDER BY CASE WHEN d.pinned = :pinnedstate3 THEN 1 ELSE 0 END DESC, $orderbyasc, d.id ASC"; 1878 1879 $neighbours['prev'] = $DB->get_record_sql($prevsql, $params, IGNORE_MULTIPLE); 1880 $neighbours['next'] = $DB->get_record_sql($nextsql, $params, IGNORE_MULTIPLE); 1881 return $neighbours; 1882 } 1883 1884 /** 1885 * Get the sql to use in the ORDER BY clause for forum discussions. 1886 * 1887 * This has the ordering take timed discussion windows into account. 1888 * 1889 * @param bool $desc True for DESC, False for ASC. 1890 * @param string $compare The field in the SQL to compare to normally sort by. 1891 * @param string $prefix The prefix being used for the discussion table. 1892 * @param bool $pinned sort pinned posts to the top 1893 * @return string 1894 */ 1895 function forum_get_default_sort_order($desc = true, $compare = 'd.timemodified', $prefix = 'd', $pinned = true) { 1896 global $CFG; 1897 1898 if (!empty($prefix)) { 1899 $prefix .= '.'; 1900 } 1901 1902 $dir = $desc ? 'DESC' : 'ASC'; 1903 1904 if ($pinned == true) { 1905 $pinned = "{$prefix}pinned DESC,"; 1906 } else { 1907 $pinned = ''; 1908 } 1909 1910 $sort = "{$prefix}timemodified"; 1911 if (!empty($CFG->forum_enabletimedposts)) { 1912 $sort = "CASE WHEN {$compare} < {$prefix}timestart 1913 THEN {$prefix}timestart 1914 ELSE {$compare} 1915 END"; 1916 } 1917 return "$pinned $sort $dir"; 1918 } 1919 1920 /** 1921 * 1922 * @global object 1923 * @global object 1924 * @global object 1925 * @uses CONTEXT_MODULE 1926 * @uses VISIBLEGROUPS 1927 * @param object $cm 1928 * @return array 1929 */ 1930 function forum_get_discussions_unread($cm) { 1931 global $CFG, $DB, $USER; 1932 1933 $now = floor(time() / 60) * 60; 1934 $cutoffdate = $now - ($CFG->forum_oldpostdays*24*60*60); 1935 1936 $params = array(); 1937 $groupmode = groups_get_activity_groupmode($cm); 1938 $currentgroup = groups_get_activity_group($cm); 1939 1940 if ($groupmode) { 1941 $modcontext = context_module::instance($cm->id); 1942 1943 if ($groupmode == VISIBLEGROUPS or has_capability('moodle/site:accessallgroups', $modcontext)) { 1944 if ($currentgroup) { 1945 $groupselect = "AND (d.groupid = :currentgroup OR d.groupid = -1)"; 1946 $params['currentgroup'] = $currentgroup; 1947 } else { 1948 $groupselect = ""; 1949 } 1950 1951 } else { 1952 //separate groups without access all 1953 if ($currentgroup) { 1954 $groupselect = "AND (d.groupid = :currentgroup OR d.groupid = -1)"; 1955 $params['currentgroup'] = $currentgroup; 1956 } else { 1957 $groupselect = "AND d.groupid = -1"; 1958 } 1959 } 1960 } else { 1961 $groupselect = ""; 1962 } 1963 1964 if (!empty($CFG->forum_enabletimedposts)) { 1965 $timedsql = "AND d.timestart < :now1 AND (d.timeend = 0 OR d.timeend > :now2)"; 1966 $params['now1'] = $now; 1967 $params['now2'] = $now; 1968 } else { 1969 $timedsql = ""; 1970 } 1971 1972 $sql = "SELECT d.id, COUNT(p.id) AS unread 1973 FROM {forum_discussions} d 1974 JOIN {forum_posts} p ON p.discussion = d.id 1975 LEFT JOIN {forum_read} r ON (r.postid = p.id AND r.userid = $USER->id) 1976 WHERE d.forum = {$cm->instance} 1977 AND p.modified >= :cutoffdate AND r.id is NULL 1978 $groupselect 1979 $timedsql 1980 GROUP BY d.id"; 1981 $params['cutoffdate'] = $cutoffdate; 1982 1983 if ($unreads = $DB->get_records_sql($sql, $params)) { 1984 foreach ($unreads as $unread) { 1985 $unreads[$unread->id] = $unread->unread; 1986 } 1987 return $unreads; 1988 } else { 1989 return array(); 1990 } 1991 } 1992 1993 /** 1994 * @global object 1995 * @global object 1996 * @global object 1997 * @uses CONEXT_MODULE 1998 * @uses VISIBLEGROUPS 1999 * @param object $cm 2000 * @return array 2001 */ 2002 function forum_get_discussions_count($cm) { 2003 global $CFG, $DB, $USER; 2004 2005 $now = floor(time() / 60) * 60; 2006 $params = array($cm->instance); 2007 $groupmode = groups_get_activity_groupmode($cm); 2008 $currentgroup = groups_get_activity_group($cm); 2009 2010 if ($groupmode) { 2011 $modcontext = context_module::instance($cm->id); 2012 2013 if ($groupmode == VISIBLEGROUPS or has_capability('moodle/site:accessallgroups', $modcontext)) { 2014 if ($currentgroup) { 2015 $groupselect = "AND (d.groupid = ? OR d.groupid = -1)"; 2016 $params[] = $currentgroup; 2017 } else { 2018 $groupselect = ""; 2019 } 2020 2021 } else { 2022 //seprate groups without access all 2023 if ($currentgroup) { 2024 $groupselect = "AND (d.groupid = ? OR d.groupid = -1)"; 2025 $params[] = $currentgroup; 2026 } else { 2027 $groupselect = "AND d.groupid = -1"; 2028 } 2029 } 2030 } else { 2031 $groupselect = ""; 2032 } 2033 2034 $timelimit = ""; 2035 2036 if (!empty($CFG->forum_enabletimedposts)) { 2037 2038 $modcontext = context_module::instance($cm->id); 2039 2040 if (!has_capability('mod/forum:viewhiddentimedposts', $modcontext)) { 2041 $timelimit = " AND ((d.timestart <= ? AND (d.timeend = 0 OR d.timeend > ?))"; 2042 $params[] = $now; 2043 $params[] = $now; 2044 if (isloggedin()) { 2045 $timelimit .= " OR d.userid = ?"; 2046 $params[] = $USER->id; 2047 } 2048 $timelimit .= ")"; 2049 } 2050 } 2051 2052 $sql = "SELECT COUNT(d.id) 2053 FROM {forum_discussions} d 2054 JOIN {forum_posts} p ON p.discussion = d.id 2055 WHERE d.forum = ? AND p.parent = 0 2056 $groupselect $timelimit"; 2057 2058 return $DB->get_field_sql($sql, $params); 2059 } 2060 2061 2062 // OTHER FUNCTIONS /////////////////////////////////////////////////////////// 2063 2064 2065 /** 2066 * @global object 2067 * @global object 2068 * @param int $courseid 2069 * @param string $type 2070 */ 2071 function forum_get_course_forum($courseid, $type) { 2072 // How to set up special 1-per-course forums 2073 global $CFG, $DB, $OUTPUT, $USER; 2074 2075 if ($forums = $DB->get_records_select("forum", "course = ? AND type = ?", array($courseid, $type), "id ASC")) { 2076 // There should always only be ONE, but with the right combination of 2077 // errors there might be more. In this case, just return the oldest one (lowest ID). 2078 foreach ($forums as $forum) { 2079 return $forum; // ie the first one 2080 } 2081 } 2082 2083 // Doesn't exist, so create one now. 2084 $forum = new stdClass(); 2085 $forum->course = $courseid; 2086 $forum->type = "$type"; 2087 if (!empty($USER->htmleditor)) { 2088 $forum->introformat = $USER->htmleditor; 2089 } 2090 switch ($forum->type) { 2091 case "news": 2092 $forum->name = get_string("namenews", "forum"); 2093 $forum->intro = get_string("intronews", "forum"); 2094 $forum->introformat = FORMAT_HTML; 2095 $forum->forcesubscribe = FORUM_FORCESUBSCRIBE; 2096 $forum->assessed = 0; 2097 if ($courseid == SITEID) { 2098 $forum->name = get_string("sitenews"); 2099 $forum->forcesubscribe = 0; 2100 } 2101 break; 2102 case "social": 2103 $forum->name = get_string("namesocial", "forum"); 2104 $forum->intro = get_string("introsocial", "forum"); 2105 $forum->introformat = FORMAT_HTML; 2106 $forum->assessed = 0; 2107 $forum->forcesubscribe = 0; 2108 break; 2109 case "blog": 2110 $forum->name = get_string('blogforum', 'forum'); 2111 $forum->intro = get_string('introblog', 'forum'); 2112 $forum->introformat = FORMAT_HTML; 2113 $forum->assessed = 0; 2114 $forum->forcesubscribe = 0; 2115 break; 2116 default: 2117 echo $OUTPUT->notification("That forum type doesn't exist!"); 2118 return false; 2119 break; 2120 } 2121 2122 $forum->timemodified = time(); 2123 $forum->id = $DB->insert_record("forum", $forum); 2124 2125 if (! $module = $DB->get_record("modules", array("name" => "forum"))) { 2126 echo $OUTPUT->notification("Could not find forum module!!"); 2127 return false; 2128 } 2129 $mod = new stdClass(); 2130 $mod->course = $courseid; 2131 $mod->module = $module->id; 2132 $mod->instance = $forum->id; 2133 $mod->section = 0; 2134 include_once("$CFG->dirroot/course/lib.php"); 2135 if (! $mod->coursemodule = add_course_module($mod) ) { 2136 echo $OUTPUT->notification("Could not add a new course module to the course '" . $courseid . "'"); 2137 return false; 2138 } 2139 $sectionid = course_add_cm_to_section($courseid, $mod->coursemodule, 0); 2140 return $DB->get_record("forum", array("id" => "$forum->id")); 2141 } 2142 2143 /** 2144 * Return rating related permissions 2145 * 2146 * @param string $options the context id 2147 * @return array an associative array of the user's rating permissions 2148 */ 2149 function forum_rating_permissions($contextid, $component, $ratingarea) { 2150 $context = context::instance_by_id($contextid, MUST_EXIST); 2151 if ($component != 'mod_forum' || $ratingarea != 'post') { 2152 // We don't know about this component/ratingarea so just return null to get the 2153 // default restrictive permissions. 2154 return null; 2155 } 2156 return array( 2157 'view' => has_capability('mod/forum:viewrating', $context), 2158 'viewany' => has_capability('mod/forum:viewanyrating', $context), 2159 'viewall' => has_capability('mod/forum:viewallratings', $context), 2160 'rate' => has_capability('mod/forum:rate', $context) 2161 ); 2162 } 2163 2164 /** 2165 * Validates a submitted rating 2166 * @param array $params submitted data 2167 * context => object the context in which the rated items exists [required] 2168 * component => The component for this module - should always be mod_forum [required] 2169 * ratingarea => object the context in which the rated items exists [required] 2170 * 2171 * itemid => int the ID of the object being rated [required] 2172 * scaleid => int the scale from which the user can select a rating. Used for bounds checking. [required] 2173 * rating => int the submitted rating [required] 2174 * rateduserid => int the id of the user whose items have been rated. NOT the user who submitted the ratings. 0 to update all. [required] 2175 * aggregation => int the aggregation method to apply when calculating grades ie RATING_AGGREGATE_AVERAGE [required] 2176 * @return boolean true if the rating is valid. Will throw rating_exception if not 2177 */ 2178 function forum_rating_validate($params) { 2179 global $DB, $USER; 2180 2181 // Check the component is mod_forum 2182 if ($params['component'] != 'mod_forum') { 2183 throw new rating_exception('invalidcomponent'); 2184 } 2185 2186 // Check the ratingarea is post (the only rating area in forum) 2187 if ($params['ratingarea'] != 'post') { 2188 throw new rating_exception('invalidratingarea'); 2189 } 2190 2191 // Check the rateduserid is not the current user .. you can't rate your own posts 2192 if ($params['rateduserid'] == $USER->id) { 2193 throw new rating_exception('nopermissiontorate'); 2194 } 2195 2196 // Fetch all the related records ... we need to do this anyway to call forum_user_can_see_post 2197 $post = $DB->get_record('forum_posts', array('id' => $params['itemid'], 'userid' => $params['rateduserid']), '*', MUST_EXIST); 2198 $discussion = $DB->get_record('forum_discussions', array('id' => $post->discussion), '*', MUST_EXIST); 2199 $forum = $DB->get_record('forum', array('id' => $discussion->forum), '*', MUST_EXIST); 2200 $course = $DB->get_record('course', array('id' => $forum->course), '*', MUST_EXIST); 2201 $cm = get_coursemodule_from_instance('forum', $forum->id, $course->id , false, MUST_EXIST); 2202 $context = context_module::instance($cm->id); 2203 2204 // Make sure the context provided is the context of the forum 2205 if ($context->id != $params['context']->id) { 2206 throw new rating_exception('invalidcontext'); 2207 } 2208 2209 if ($forum->scale != $params['scaleid']) { 2210 //the scale being submitted doesnt match the one in the database 2211 throw new rating_exception('invalidscaleid'); 2212 } 2213 2214 // check the item we're rating was created in the assessable time window 2215 if (!empty($forum->assesstimestart) && !empty($forum->assesstimefinish)) { 2216 if ($post->created < $forum->assesstimestart || $post->created > $forum->assesstimefinish) { 2217 throw new rating_exception('notavailable'); 2218 } 2219 } 2220 2221 //check that the submitted rating is valid for the scale 2222 2223 // lower limit 2224 if ($params['rating'] < 0 && $params['rating'] != RATING_UNSET_RATING) { 2225 throw new rating_exception('invalidnum'); 2226 } 2227 2228 // upper limit 2229 if ($forum->scale < 0) { 2230 //its a custom scale 2231 $scalerecord = $DB->get_record('scale', array('id' => -$forum->scale)); 2232 if ($scalerecord) { 2233 $scalearray = explode(',', $scalerecord->scale); 2234 if ($params['rating'] > count($scalearray)) { 2235 throw new rating_exception('invalidnum'); 2236 } 2237 } else { 2238 throw new rating_exception('invalidscaleid'); 2239 } 2240 } else if ($params['rating'] > $forum->scale) { 2241 //if its numeric and submitted rating is above maximum 2242 throw new rating_exception('invalidnum'); 2243 } 2244 2245 // Make sure groups allow this user to see the item they're rating 2246 if ($discussion->groupid > 0 and $groupmode = groups_get_activity_groupmode($cm, $course)) { // Groups are being used 2247 if (!groups_group_exists($discussion->groupid)) { // Can't find group 2248 throw new rating_exception('cannotfindgroup');//something is wrong 2249 } 2250 2251 if (!groups_is_member($discussion->groupid) and !has_capability('moodle/site:accessallgroups', $context)) { 2252 // do not allow rating of posts from other groups when in SEPARATEGROUPS or VISIBLEGROUPS 2253 throw new rating_exception('notmemberofgroup'); 2254 } 2255 } 2256 2257 // perform some final capability checks 2258 if (!forum_user_can_see_post($forum, $discussion, $post, $USER, $cm)) { 2259 throw new rating_exception('nopermissiontorate'); 2260 } 2261 2262 return true; 2263 } 2264 2265 /** 2266 * Can the current user see ratings for a given itemid? 2267 * 2268 * @param array $params submitted data 2269 * contextid => int contextid [required] 2270 * component => The component for this module - should always be mod_forum [required] 2271 * ratingarea => object the context in which the rated items exists [required] 2272 * itemid => int the ID of the object being rated [required] 2273 * scaleid => int scale id [optional] 2274 * @return bool 2275 * @throws coding_exception 2276 * @throws rating_exception 2277 */ 2278 function mod_forum_rating_can_see_item_ratings($params) { 2279 global $DB, $USER; 2280 2281 // Check the component is mod_forum. 2282 if (!isset($params['component']) || $params['component'] != 'mod_forum') { 2283 throw new rating_exception('invalidcomponent'); 2284 } 2285 2286 // Check the ratingarea is post (the only rating area in forum). 2287 if (!isset($params['ratingarea']) || $params['ratingarea'] != 'post') { 2288 throw new rating_exception('invalidratingarea'); 2289 } 2290 2291 if (!isset($params['itemid'])) { 2292 throw new rating_exception('invaliditemid'); 2293 } 2294 2295 $post = $DB->get_record('forum_posts', array('id' => $params['itemid']), '*', MUST_EXIST); 2296 $discussion = $DB->get_record('forum_discussions', array('id' => $post->discussion), '*', MUST_EXIST); 2297 $forum = $DB->get_record('forum', array('id' => $discussion->forum), '*', MUST_EXIST); 2298 $course = $DB->get_record('course', array('id' => $forum->course), '*', MUST_EXIST); 2299 $cm = get_coursemodule_from_instance('forum', $forum->id, $course->id , false, MUST_EXIST); 2300 2301 // Perform some final capability checks. 2302 if (!forum_user_can_see_post($forum, $discussion, $post, $USER, $cm)) { 2303 return false; 2304 } 2305 2306 return true; 2307 } 2308 2309 /** 2310 * This function prints the overview of a discussion in the forum listing. 2311 * It needs some discussion information and some post information, these 2312 * happen to be combined for efficiency in the $post parameter by the function 2313 * that calls this one: forum_print_latest_discussions() 2314 * 2315 * @global object 2316 * @global object 2317 * @param object $post The post object (passed by reference for speed). 2318 * @param object $forum The forum object. 2319 * @param int $group Current group. 2320 * @param string $datestring Format to use for the dates. 2321 * @param boolean $cantrack Is tracking enabled for this forum. 2322 * @param boolean $forumtracked Is the user tracking this forum. 2323 * @param boolean $canviewparticipants True if user has the viewparticipants permission for this course 2324 * @param boolean $canviewhiddentimedposts True if user has the viewhiddentimedposts permission for this forum 2325 */ 2326 function forum_print_discussion_header(&$post, $forum, $group = -1, $datestring = "", 2327 $cantrack = true, $forumtracked = true, $canviewparticipants = true, $modcontext = null, 2328 $canviewhiddentimedposts = false) { 2329 2330 global $COURSE, $USER, $CFG, $OUTPUT, $PAGE; 2331 2332 static $rowcount; 2333 static $strmarkalldread; 2334 2335 if (empty($modcontext)) { 2336 if (!$cm = get_coursemodule_from_instance('forum', $forum->id, $forum->course)) { 2337 print_error('invalidcoursemodule'); 2338 } 2339 $modcontext = context_module::instance($cm->id); 2340 } 2341 2342 if (!isset($rowcount)) { 2343 $rowcount = 0; 2344 $strmarkalldread = get_string('markalldread', 'forum'); 2345 } else { 2346 $rowcount = ($rowcount + 1) % 2; 2347 } 2348 2349 $post->subject = format_string($post->subject,true); 2350 2351 $canviewfullnames = has_capability('moodle/site:viewfullnames', $modcontext); 2352 $timeddiscussion = !empty($CFG->forum_enabletimedposts) && ($post->timestart || $post->timeend); 2353 $timedoutsidewindow = ''; 2354 if ($timeddiscussion && ($post->timestart > time() || ($post->timeend != 0 && $post->timeend < time()))) { 2355 $timedoutsidewindow = ' dimmed_text'; 2356 } 2357 2358 echo "\n\n"; 2359 echo '<tr class="discussion r'.$rowcount.$timedoutsidewindow.'">'; 2360 2361 $topicclass = 'topic starter'; 2362 if (FORUM_DISCUSSION_PINNED == $post->pinned) { 2363 $topicclass .= ' pinned'; 2364 } 2365 echo '<td class="'.$topicclass.'">'; 2366 if (FORUM_DISCUSSION_PINNED == $post->pinned) { 2367 echo $OUTPUT->pix_icon('i/pinned', get_string('discussionpinned', 'forum'), 'mod_forum'); 2368 } 2369 $canalwaysseetimedpost = $USER->id == $post->userid || $canviewhiddentimedposts; 2370 if ($timeddiscussion && $canalwaysseetimedpost) { 2371 echo $PAGE->get_renderer('mod_forum')->timed_discussion_tooltip($post, empty($timedoutsidewindow)); 2372 } 2373 2374 echo '<a href="'.$CFG->wwwroot.'/mod/forum/discuss.php?d='.$post->discussion.'">'.$post->subject.'</a>'; 2375 echo "</td>\n"; 2376 2377 // Picture 2378 $postuser = new stdClass(); 2379 $postuserfields = explode(',', implode(',', \core_user\fields::get_picture_fields())); 2380 $postuser = username_load_fields_from_object($postuser, $post, null, $postuserfields); 2381 $postuser->id = $post->userid; 2382 echo '<td class="author">'; 2383 echo '<div class="media">'; 2384 echo '<span class="float-left">'; 2385 echo $OUTPUT->user_picture($postuser, array('courseid'=>$forum->course)); 2386 echo '</span>'; 2387 // User name 2388 echo '<div class="media-body">'; 2389 $fullname = fullname($postuser, $canviewfullnames); 2390 echo '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$post->userid.'&course='.$forum->course.'">'.$fullname.'</a>'; 2391 echo '</div>'; 2392 echo '</div>'; 2393 echo "</td>\n"; 2394 2395 // Group picture 2396 if ($group !== -1) { // Groups are active - group is a group data object or NULL 2397 echo '<td class="picture group">'; 2398 if (!empty($group->picture)) { 2399 if ($canviewparticipants && $COURSE->groupmode) { 2400 $picturelink = true; 2401 } else { 2402 $picturelink = false; 2403 } 2404 print_group_picture($group, $forum->course, false, false, $picturelink); 2405 } else if (isset($group->id)) { 2406 if ($canviewparticipants && $COURSE->groupmode) { 2407 echo '<a href="'.$CFG->wwwroot.'/user/index.php?id='.$forum->course.'&group='.$group->id.'">'.$group->name.'</a>'; 2408 } else { 2409 echo $group->name; 2410 } 2411 } 2412 echo "</td>\n"; 2413 } 2414 2415 if (has_capability('mod/forum:viewdiscussion', $modcontext)) { // Show the column with replies 2416 echo '<td class="replies">'; 2417 echo '<a href="'.$CFG->wwwroot.'/mod/forum/discuss.php?d='.$post->discussion.'">'; 2418 echo $post->replies.'</a>'; 2419 echo "</td>\n"; 2420 2421 if ($cantrack) { 2422 echo '<td class="replies">'; 2423 if ($forumtracked) { 2424 if ($post->unread > 0) { 2425 echo '<span class="unread">'; 2426 echo '<a href="'.$CFG->wwwroot.'/mod/forum/discuss.php?d='.$post->discussion.'#unread">'; 2427 echo $post->unread; 2428 echo '</a>'; 2429 echo '<a title="'.$strmarkalldread.'" href="'.$CFG->wwwroot.'/mod/forum/markposts.php?f='. 2430 $forum->id.'&d='.$post->discussion.'&mark=read&return=/mod/forum/view.php&sesskey=' . 2431 sesskey() . '">' . $OUTPUT->pix_icon('t/markasread', $strmarkalldread) . '</a>'; 2432 echo '</span>'; 2433 } else { 2434 echo '<span class="read">'; 2435 echo $post->unread; 2436 echo '</span>'; 2437 } 2438 } else { 2439 echo '<span class="read">'; 2440 echo '-'; 2441 echo '</span>'; 2442 } 2443 echo "</td>\n"; 2444 } 2445 } 2446 2447 echo '<td class="lastpost">'; 2448 $usedate = (empty($post->timemodified)) ? $post->created : $post->timemodified; 2449 $parenturl = ''; 2450 $usermodified = new stdClass(); 2451 $usermodified->id = $post->usermodified; 2452 $usermodified = username_load_fields_from_object($usermodified, $post, 'um'); 2453 2454 // In QA forums we check that the user can view participants. 2455 if ($forum->type !== 'qanda' || $canviewparticipants) { 2456 echo '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$post->usermodified.'&course='.$forum->course.'">'. 2457 fullname($usermodified, $canviewfullnames).'</a><br />'; 2458 $parenturl = (empty($post->lastpostid)) ? '' : '&parent='.$post->lastpostid; 2459 } 2460 2461 echo '<a href="'.$CFG->wwwroot.'/mod/forum/discuss.php?d='.$post->discussion.$parenturl.'">'. 2462 userdate_htmltime($usedate, $datestring).'</a>'; 2463 echo "</td>\n"; 2464 2465 // is_guest should be used here as this also checks whether the user is a guest in the current course. 2466 // Guests and visitors cannot subscribe - only enrolled users. 2467 if ((!is_guest($modcontext, $USER) && isloggedin()) && has_capability('mod/forum:viewdiscussion', $modcontext)) { 2468 // Discussion subscription. 2469 if (\mod_forum\subscriptions::is_subscribable($forum)) { 2470 echo '<td class="discussionsubscription">'; 2471 echo forum_get_discussion_subscription_icon($forum, $post->discussion); 2472 echo '</td>'; 2473 } 2474 } 2475 2476 echo "</tr>\n\n"; 2477 2478 } 2479 2480 /** 2481 * Return the markup for the discussion subscription toggling icon. 2482 * 2483 * @param stdClass $forum The forum object. 2484 * @param int $discussionid The discussion to create an icon for. 2485 * @return string The generated markup. 2486 */ 2487 function forum_get_discussion_subscription_icon($forum, $discussionid, $returnurl = null, $includetext = false) { 2488 global $USER, $OUTPUT, $PAGE; 2489 2490 if ($returnurl === null && $PAGE->url) { 2491 $returnurl = $PAGE->url->out(); 2492 } 2493 2494 $o = ''; 2495 $subscriptionstatus = \mod_forum\subscriptions::is_subscribed($USER->id, $forum, $discussionid); 2496 $subscriptionlink = new moodle_url('/mod/forum/subscribe.php', array( 2497 'sesskey' => sesskey(), 2498 'id' => $forum->id, 2499 'd' => $discussionid, 2500 'returnurl' => $returnurl, 2501 )); 2502 2503 if ($includetext) { 2504 $o .= $subscriptionstatus ? get_string('subscribed', 'mod_forum') : get_string('notsubscribed', 'mod_forum'); 2505 } 2506 2507 if ($subscriptionstatus) { 2508 $output = $OUTPUT->pix_icon('t/subscribed', get_string('clicktounsubscribe', 'forum'), 'mod_forum'); 2509 if ($includetext) { 2510 $output .= get_string('subscribed', 'mod_forum'); 2511 } 2512 2513 return html_writer::link($subscriptionlink, $output, array( 2514 'title' => get_string('clicktounsubscribe', 'forum'), 2515 'class' => 'discussiontoggle btn btn-link', 2516 'data-forumid' => $forum->id, 2517 'data-discussionid' => $discussionid, 2518 'data-includetext' => $includetext, 2519 )); 2520 2521 } else { 2522 $output = $OUTPUT->pix_icon('t/unsubscribed', get_string('clicktosubscribe', 'forum'), 'mod_forum'); 2523 if ($includetext) { 2524 $output .= get_string('notsubscribed', 'mod_forum'); 2525 } 2526 2527 return html_writer::link($subscriptionlink, $output, array( 2528 'title' => get_string('clicktosubscribe', 'forum'), 2529 'class' => 'discussiontoggle btn btn-link', 2530 'data-forumid' => $forum->id, 2531 'data-discussionid' => $discussionid, 2532 'data-includetext' => $includetext, 2533 )); 2534 } 2535 } 2536 2537 /** 2538 * Return a pair of spans containing classes to allow the subscribe and 2539 * unsubscribe icons to be pre-loaded by a browser. 2540 * 2541 * @return string The generated markup 2542 */ 2543 function forum_get_discussion_subscription_icon_preloaders() { 2544 $o = ''; 2545 $o .= html_writer::span(' ', 'preload-subscribe'); 2546 $o .= html_writer::span(' ', 'preload-unsubscribe'); 2547 return $o; 2548 } 2549 2550 /** 2551 * Print the drop down that allows the user to select how they want to have 2552 * the discussion displayed. 2553 * 2554 * @param int $id forum id if $forumtype is 'single', 2555 * discussion id for any other forum type 2556 * @param mixed $mode forum layout mode 2557 * @param string $forumtype optional 2558 */ 2559 function forum_print_mode_form($id, $mode, $forumtype='') { 2560 global $OUTPUT; 2561 $useexperimentalui = get_user_preferences('forum_useexperimentalui', false); 2562 if ($forumtype == 'single') { 2563 $select = new single_select( 2564 new moodle_url("/mod/forum/view.php", 2565 array('f' => $id)), 2566 'mode', 2567 forum_get_layout_modes($useexperimentalui), 2568 $mode, 2569 null, 2570 "mode" 2571 ); 2572 $select->set_label(get_string('displaymode', 'forum'), array('class' => 'accesshide')); 2573 $select->class = "forummode"; 2574 } else { 2575 $select = new single_select( 2576 new moodle_url("/mod/forum/discuss.php", 2577 array('d' => $id)), 2578 'mode', 2579 forum_get_layout_modes($useexperimentalui), 2580 $mode, 2581 null, 2582 "mode" 2583 ); 2584 $select->set_label(get_string('displaymode', 'forum'), array('class' => 'accesshide')); 2585 } 2586 echo $OUTPUT->render($select); 2587 } 2588 2589 /** 2590 * @global object 2591 * @param object $course 2592 * @param string $search 2593 * @return string 2594 */ 2595 function forum_search_form($course, $search='') { 2596 global $CFG, $PAGE; 2597 $forumsearch = new \mod_forum\output\quick_search_form($course->id, $search); 2598 $output = $PAGE->get_renderer('mod_forum'); 2599 return $output->render($forumsearch); 2600 } 2601 2602 2603 /** 2604 * @global object 2605 * @global object 2606 */ 2607 function forum_set_return() { 2608 global $CFG, $SESSION; 2609 2610 if (! isset($SESSION->fromdiscussion)) { 2611 $referer = get_local_referer(false); 2612 // If the referer is NOT a login screen then save it. 2613 if (! strncasecmp("$CFG->wwwroot/login", $referer, 300)) { 2614 $SESSION->fromdiscussion = $referer; 2615 } 2616 } 2617 } 2618 2619 2620 /** 2621 * @global object 2622 * @param string|\moodle_url $default 2623 * @return string 2624 */ 2625 function forum_go_back_to($default) { 2626 global $SESSION; 2627 2628 if (!empty($SESSION->fromdiscussion)) { 2629 $returnto = $SESSION->fromdiscussion; 2630 unset($SESSION->fromdiscussion); 2631 return $returnto; 2632 } else { 2633 return $default; 2634 } 2635 } 2636 2637 /** 2638 * Given a discussion object that is being moved to $forumto, 2639 * this function checks all posts in that discussion 2640 * for attachments, and if any are found, these are 2641 * moved to the new forum directory. 2642 * 2643 * @global object 2644 * @param object $discussion 2645 * @param int $forumfrom source forum id 2646 * @param int $forumto target forum id 2647 * @return bool success 2648 */ 2649 function forum_move_attachments($discussion, $forumfrom, $forumto) { 2650 global $DB; 2651 2652 $fs = get_file_storage(); 2653 2654 $newcm = get_coursemodule_from_instance('forum', $forumto); 2655 $oldcm = get_coursemodule_from_instance('forum', $forumfrom); 2656 2657 $newcontext = context_module::instance($newcm->id); 2658 $oldcontext = context_module::instance($oldcm->id); 2659 2660 // loop through all posts, better not use attachment flag ;-) 2661 if ($posts = $DB->get_records('forum_posts', array('discussion'=>$discussion->id), '', 'id, attachment')) { 2662 foreach ($posts as $post) { 2663 $fs->move_area_files_to_new_context($oldcontext->id, 2664 $newcontext->id, 'mod_forum', 'post', $post->id); 2665 $attachmentsmoved = $fs->move_area_files_to_new_context($oldcontext->id, 2666 $newcontext->id, 'mod_forum', 'attachment', $post->id); 2667 if ($attachmentsmoved > 0 && $post->attachment != '1') { 2668 // Weird - let's fix it 2669 $post->attachment = '1'; 2670 $DB->update_record('forum_posts', $post); 2671 } else if ($attachmentsmoved == 0 && $post->attachment != '') { 2672 // Weird - let's fix it 2673 $post->attachment = ''; 2674 $DB->update_record('forum_posts', $post); 2675 } 2676 } 2677 } 2678 2679 return true; 2680 } 2681 2682 /** 2683 * Returns attachments as formated text/html optionally with separate images 2684 * 2685 * @global object 2686 * @global object 2687 * @global object 2688 * @param object $post 2689 * @param object $cm 2690 * @param string $type html/text/separateimages 2691 * @return mixed string or array of (html text withouth images and image HTML) 2692 */ 2693 function forum_print_attachments($post, $cm, $type) { 2694 global $CFG, $DB, $USER, $OUTPUT; 2695 2696 if (empty($post->attachment)) { 2697 return $type !== 'separateimages' ? '' : array('', ''); 2698 } 2699 2700 if (!in_array($type, array('separateimages', 'html', 'text'))) { 2701 return $type !== 'separateimages' ? '' : array('', ''); 2702 } 2703 2704 if (!$context = context_module::instance($cm->id)) { 2705 return $type !== 'separateimages' ? '' : array('', ''); 2706 } 2707 $strattachment = get_string('attachment', 'forum'); 2708 2709 $fs = get_file_storage(); 2710 2711 $imagereturn = ''; 2712 $output = ''; 2713 2714 $canexport = !empty($CFG->enableportfolios) && (has_capability('mod/forum:exportpost', $context) || ($post->userid == $USER->id && has_capability('mod/forum:exportownpost', $context))); 2715 2716 if ($canexport) { 2717 require_once($CFG->libdir.'/portfoliolib.php'); 2718 } 2719 2720 // We retrieve all files according to the time that they were created. In the case that several files were uploaded 2721 // at the sametime (e.g. in the case of drag/drop upload) we revert to using the filename. 2722 $files = $fs->get_area_files($context->id, 'mod_forum', 'attachment', $post->id, "filename", false); 2723 if ($files) { 2724 if ($canexport) { 2725 $button = new portfolio_add_button(); 2726 } 2727 foreach ($files as $file) { 2728 $filename = $file->get_filename(); 2729 $mimetype = $file->get_mimetype(); 2730 $iconimage = $OUTPUT->pix_icon(file_file_icon($file), get_mimetype_description($file), 'moodle', array('class' => 'icon')); 2731 $path = file_encode_url($CFG->wwwroot.'/pluginfile.php', '/'.$context->id.'/mod_forum/attachment/'.$post->id.'/'.$filename); 2732 2733 if ($type == 'html') { 2734 $output .= "<a href=\"$path\">$iconimage</a> "; 2735 $output .= "<a href=\"$path\">".s($filename)."</a>"; 2736 if ($canexport) { 2737 $button->set_callback_options('forum_portfolio_caller', array('postid' => $post->id, 'attachment' => $file->get_id()), 'mod_forum'); 2738 $button->set_format_by_file($file); 2739 $output .= $button->to_html(PORTFOLIO_ADD_ICON_LINK); 2740 } 2741 $output .= "<br />"; 2742 2743 } else if ($type == 'text') { 2744 $output .= "$strattachment ".s($filename).":\n$path\n"; 2745 2746 } else { //'returnimages' 2747 if (in_array($mimetype, array('image/gif', 'image/jpeg', 'image/png'))) { 2748 // Image attachments don't get printed as links 2749 $imagereturn .= "<br /><img src=\"$path\" alt=\"\" />"; 2750 if ($canexport) { 2751 $button->set_callback_options('forum_portfolio_caller', array('postid' => $post->id, 'attachment' => $file->get_id()), 'mod_forum'); 2752 $button->set_format_by_file($file); 2753 $imagereturn .= $button->to_html(PORTFOLIO_ADD_ICON_LINK); 2754 } 2755 } else { 2756 $output .= "<a href=\"$path\">$iconimage</a> "; 2757 $output .= format_text("<a href=\"$path\">".s($filename)."</a>", FORMAT_HTML, array('context'=>$context)); 2758 if ($canexport) { 2759 $button->set_callback_options('forum_portfolio_caller', array('postid' => $post->id, 'attachment' => $file->get_id()), 'mod_forum'); 2760 $button->set_format_by_file($file); 2761 $output .= $button->to_html(PORTFOLIO_ADD_ICON_LINK); 2762 } 2763 $output .= '<br />'; 2764 } 2765 } 2766 2767 if (!empty($CFG->enableplagiarism)) { 2768 require_once($CFG->libdir.'/plagiarismlib.php'); 2769 $output .= plagiarism_get_links(array('userid' => $post->userid, 2770 'file' => $file, 2771 'cmid' => $cm->id, 2772 'course' => $cm->course, 2773 'forum' => $cm->instance)); 2774 $output .= '<br />'; 2775 } 2776 } 2777 } 2778 2779 if ($type !== 'separateimages') { 2780 return $output; 2781 2782 } else { 2783 return array($output, $imagereturn); 2784 } 2785 } 2786 2787 //////////////////////////////////////////////////////////////////////////////// 2788 // File API // 2789 //////////////////////////////////////////////////////////////////////////////// 2790 2791 /** 2792 * Lists all browsable file areas 2793 * 2794 * @package mod_forum 2795 * @category files 2796 * @param stdClass $course course object 2797 * @param stdClass $cm course module object 2798 * @param stdClass $context context object 2799 * @return array 2800 */ 2801 function forum_get_file_areas($course, $cm, $context) { 2802 return array( 2803 'attachment' => get_string('areaattachment', 'mod_forum'), 2804 'post' => get_string('areapost', 'mod_forum'), 2805 ); 2806 } 2807 2808 /** 2809 * File browsing support for forum module. 2810 * 2811 * @package mod_forum 2812 * @category files 2813 * @param stdClass $browser file browser object 2814 * @param stdClass $areas file areas 2815 * @param stdClass $course course object 2816 * @param stdClass $cm course module 2817 * @param stdClass $context context module 2818 * @param string $filearea file area 2819 * @param int $itemid item ID 2820 * @param string $filepath file path 2821 * @param string $filename file name 2822 * @return file_info instance or null if not found 2823 */ 2824 function forum_get_file_info($browser, $areas, $course, $cm, $context, $filearea, $itemid, $filepath, $filename) { 2825 global $CFG, $DB, $USER; 2826 2827 if ($context->contextlevel != CONTEXT_MODULE) { 2828 return null; 2829 } 2830 2831 // filearea must contain a real area 2832 if (!isset($areas[$filearea])) { 2833 return null; 2834 } 2835 2836 // Note that forum_user_can_see_post() additionally allows access for parent roles 2837 // and it explicitly checks qanda forum type, too. One day, when we stop requiring 2838 // course:managefiles, we will need to extend this. 2839 if (!has_capability('mod/forum:viewdiscussion', $context)) { 2840 return null; 2841 } 2842 2843 if (is_null($itemid)) { 2844 require_once($CFG->dirroot.'/mod/forum/locallib.php'); 2845 return new forum_file_info_container($browser, $course, $cm, $context, $areas, $filearea); 2846 } 2847 2848 static $cached = array(); 2849 // $cached will store last retrieved post, discussion and forum. To make sure that the cache 2850 // is cleared between unit tests we check if this is the same session 2851 if (!isset($cached['sesskey']) || $cached['sesskey'] != sesskey()) { 2852 $cached = array('sesskey' => sesskey()); 2853 } 2854 2855 if (isset($cached['post']) && $cached['post']->id == $itemid) { 2856 $post = $cached['post']; 2857 } else if ($post = $DB->get_record('forum_posts', array('id' => $itemid))) { 2858 $cached['post'] = $post; 2859 } else { 2860 return null; 2861 } 2862 2863 if (isset($cached['discussion']) && $cached['discussion']->id == $post->discussion) { 2864 $discussion = $cached['discussion']; 2865 } else if ($discussion = $DB->get_record('forum_discussions', array('id' => $post->discussion))) { 2866 $cached['discussion'] = $discussion; 2867 } else { 2868 return null; 2869 } 2870 2871 if (isset($cached['forum']) && $cached['forum']->id == $cm->instance) { 2872 $forum = $cached['forum']; 2873 } else if ($forum = $DB->get_record('forum', array('id' => $cm->instance))) { 2874 $cached['forum'] = $forum; 2875 } else { 2876 return null; 2877 } 2878 2879 $fs = get_file_storage(); 2880 $filepath = is_null($filepath) ? '/' : $filepath; 2881 $filename = is_null($filename) ? '.' : $filename; 2882 if (!($storedfile = $fs->get_file($context->id, 'mod_forum', $filearea, $itemid, $filepath, $filename))) { 2883 return null; 2884 } 2885 2886 // Checks to see if the user can manage files or is the owner. 2887 // TODO MDL-33805 - Do not use userid here and move the capability check above. 2888 if (!has_capability('moodle/course:managefiles', $context) && $storedfile->get_userid() != $USER->id) { 2889 return null; 2890 } 2891 // Make sure groups allow this user to see this file 2892 if ($discussion->groupid > 0 && !has_capability('moodle/site:accessallgroups', $context)) { 2893 $groupmode = groups_get_activity_groupmode($cm, $course); 2894 if ($groupmode == SEPARATEGROUPS && !groups_is_member($discussion->groupid)) { 2895 return null; 2896 } 2897 } 2898 2899 // Make sure we're allowed to see it... 2900 if (!forum_user_can_see_post($forum, $discussion, $post, NULL, $cm)) { 2901 return null; 2902 } 2903 2904 $urlbase = $CFG->wwwroot.'/pluginfile.php'; 2905 return new file_info_stored($browser, $context, $storedfile, $urlbase, $itemid, true, true, false, false); 2906 } 2907 2908 /** 2909 * Serves the forum attachments. Implements needed access control ;-) 2910 * 2911 * @package mod_forum 2912 * @category files 2913 * @param stdClass $course course object 2914 * @param stdClass $cm course module object 2915 * @param stdClass $context context object 2916 * @param string $filearea file area 2917 * @param array $args extra arguments 2918 * @param bool $forcedownload whether or not force download 2919 * @param array $options additional options affecting the file serving 2920 * @return bool false if file not found, does not return if found - justsend the file 2921 */ 2922 function forum_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, array $options=array()) { 2923 global $CFG, $DB; 2924 2925 if ($context->contextlevel != CONTEXT_MODULE) { 2926 return false; 2927 } 2928 2929 require_course_login($course, true, $cm); 2930 2931 $areas = forum_get_file_areas($course, $cm, $context); 2932 2933 // filearea must contain a real area 2934 if (!isset($areas[$filearea])) { 2935 return false; 2936 } 2937 2938 $postid = (int)array_shift($args); 2939 2940 if (!$post = $DB->get_record('forum_posts', array('id'=>$postid))) { 2941 return false; 2942 } 2943 2944 if (!$discussion = $DB->get_record('forum_discussions', array('id'=>$post->discussion))) { 2945 return false; 2946 } 2947 2948 if (!$forum = $DB->get_record('forum', array('id'=>$cm->instance))) { 2949 return false; 2950 } 2951 2952 $fs = get_file_storage(); 2953 $relativepath = implode('/', $args); 2954 $fullpath = "/$context->id/mod_forum/$filearea/$postid/$relativepath"; 2955 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) { 2956 return false; 2957 } 2958 2959 // Make sure groups allow this user to see this file 2960 if ($discussion->groupid > 0) { 2961 $groupmode = groups_get_activity_groupmode($cm, $course); 2962 if ($groupmode == SEPARATEGROUPS) { 2963 if (!groups_is_member($discussion->groupid) and !has_capability('moodle/site:accessallgroups', $context)) { 2964 return false; 2965 } 2966 } 2967 } 2968 2969 // Make sure we're allowed to see it... 2970 if (!forum_user_can_see_post($forum, $discussion, $post, NULL, $cm)) { 2971 return false; 2972 } 2973 2974 // finally send the file 2975 send_stored_file($file, 0, 0, true, $options); // download MUST be forced - security! 2976 } 2977 2978 /** 2979 * If successful, this function returns the name of the file 2980 * 2981 * @global object 2982 * @param object $post is a full post record, including course and forum 2983 * @param object $forum 2984 * @param object $cm 2985 * @param mixed $mform 2986 * @param string $unused 2987 * @return bool 2988 */ 2989 function forum_add_attachment($post, $forum, $cm, $mform=null, $unused=null) { 2990 global $DB; 2991 2992 if (empty($mform)) { 2993 return false; 2994 } 2995 2996 if (empty($post->attachments)) { 2997 return true; // Nothing to do 2998 } 2999 3000 $context = context_module::instance($cm->id); 3001 3002 $info = file_get_draft_area_info($post->attachments); 3003 $present = ($info['filecount']>0) ? '1' : ''; 3004 file_save_draft_area_files($post->attachments, $context->id, 'mod_forum', 'attachment', $post->id, 3005 mod_forum_post_form::attachment_options($forum)); 3006 3007 $DB->set_field('forum_posts', 'attachment', $present, array('id'=>$post->id)); 3008 3009 return true; 3010 } 3011 3012 /** 3013 * Add a new post in an existing discussion. 3014 * 3015 * @param stdClass $post The post data 3016 * @param mixed $mform The submitted form 3017 * @param string $unused 3018 * @return int 3019 */ 3020 function forum_add_new_post($post, $mform, $unused = null) { 3021 global $USER, $DB; 3022 3023 $discussion = $DB->get_record('forum_discussions', array('id' => $post->discussion)); 3024 $forum = $DB->get_record('forum', array('id' => $discussion->forum)); 3025 $cm = get_coursemodule_from_instance('forum', $forum->id); 3026 $context = context_module::instance($cm->id); 3027 $privatereplyto = 0; 3028 3029 // Check whether private replies should be enabled for this post. 3030 if ($post->parent) { 3031 $parent = $DB->get_record('forum_posts', array('id' => $post->parent)); 3032 3033 if (!empty($parent->privatereplyto)) { 3034 throw new \coding_exception('It should not be possible to reply to a private reply'); 3035 } 3036 3037 if (!empty($post->isprivatereply) && forum_user_can_reply_privately($context, $parent)) { 3038 $privatereplyto = $parent->userid; 3039 } 3040 } 3041 3042 $post->created = $post->modified = time(); 3043 $post->mailed = FORUM_MAILED_PENDING; 3044 $post->userid = $USER->id; 3045 $post->privatereplyto = $privatereplyto; 3046 $post->attachment = ""; 3047 if (!isset($post->totalscore)) { 3048 $post->totalscore = 0; 3049 } 3050 if (!isset($post->mailnow)) { 3051 $post->mailnow = 0; 3052 } 3053 3054 \mod_forum\local\entities\post::add_message_counts($post); 3055 $post->id = $DB->insert_record("forum_posts", $post); 3056 $post->message = file_save_draft_area_files($post->itemid, $context->id, 'mod_forum', 'post', $post->id, 3057 mod_forum_post_form::editor_options($context, null), $post->message); 3058 $DB->set_field('forum_posts', 'message', $post->message, array('id'=>$post->id)); 3059 forum_add_attachment($post, $forum, $cm, $mform); 3060 3061 // Update discussion modified date 3062 $DB->set_field("forum_discussions", "timemodified", $post->modified, array("id" => $post->discussion)); 3063 $DB->set_field("forum_discussions", "usermodified", $post->userid, array("id" => $post->discussion)); 3064 3065 if (forum_tp_can_track_forums($forum) && forum_tp_is_tracked($forum)) { 3066 forum_tp_mark_post_read($post->userid, $post); 3067 } 3068 3069 if (isset($post->tags)) { 3070 core_tag_tag::set_item_tags('mod_forum', 'forum_posts', $post->id, $context, $post->tags); 3071 } 3072 3073 // Let Moodle know that assessable content is uploaded (eg for plagiarism detection) 3074 forum_trigger_content_uploaded_event($post, $cm, 'forum_add_new_post'); 3075 3076 return $post->id; 3077 } 3078 3079 /** 3080 * Trigger post updated event. 3081 * 3082 * @param object $post forum post object 3083 * @param object $discussion discussion object 3084 * @param object $context forum context object 3085 * @param object $forum forum object 3086 * @since Moodle 3.8 3087 * @return void 3088 */ 3089 function forum_trigger_post_updated_event($post, $discussion, $context, $forum) { 3090 global $USER; 3091 3092 $params = array( 3093 'context' => $context, 3094 'objectid' => $post->id, 3095 'other' => array( 3096 'discussionid' => $discussion->id, 3097 'forumid' => $forum->id, 3098 'forumtype' => $forum->type, 3099 ) 3100 ); 3101 3102 if ($USER->id !== $post->userid) { 3103 $params['relateduserid'] = $post->userid; 3104 } 3105 3106 $event = \mod_forum\event\post_updated::create($params); 3107 $event->add_record_snapshot('forum_discussions', $discussion); 3108 $event->trigger(); 3109 } 3110 3111 /** 3112 * Update a post. 3113 * 3114 * @param stdClass $newpost The post to update 3115 * @param mixed $mform The submitted form 3116 * @param string $unused 3117 * @return bool 3118 */ 3119 function forum_update_post($newpost, $mform, $unused = null) { 3120 global $DB, $USER; 3121 3122 $post = $DB->get_record('forum_posts', array('id' => $newpost->id)); 3123 $discussion = $DB->get_record('forum_discussions', array('id' => $post->discussion)); 3124 $forum = $DB->get_record('forum', array('id' => $discussion->forum)); 3125 $cm = get_coursemodule_from_instance('forum', $forum->id); 3126 $context = context_module::instance($cm->id); 3127 3128 // Allowed modifiable fields. 3129 $modifiablefields = [ 3130 'subject', 3131 'message', 3132 'messageformat', 3133 'messagetrust', 3134 'timestart', 3135 'timeend', 3136 'pinned', 3137 'attachments', 3138 ]; 3139 foreach ($modifiablefields as $field) { 3140 if (isset($newpost->{$field})) { 3141 $post->{$field} = $newpost->{$field}; 3142 } 3143 } 3144 $post->modified = time(); 3145 3146 if (!$post->parent) { // Post is a discussion starter - update discussion title and times too 3147 $discussion->name = $post->subject; 3148 $discussion->timestart = $post->timestart; 3149 $discussion->timeend = $post->timeend; 3150 3151 if (isset($post->pinned)) { 3152 $discussion->pinned = $post->pinned; 3153 } 3154 } 3155 $post->message = file_save_draft_area_files($newpost->itemid, $context->id, 'mod_forum', 'post', $post->id, 3156 mod_forum_post_form::editor_options($context, $post->id), $post->message); 3157 \mod_forum\local\entities\post::add_message_counts($post); 3158 $DB->update_record('forum_posts', $post); 3159 // Note: Discussion modified time/user are intentionally not updated, to enable them to track the latest new post. 3160 $DB->update_record('forum_discussions', $discussion); 3161 3162 forum_add_attachment($post, $forum, $cm, $mform); 3163 3164 if ($forum->type == 'single' && $post->parent == '0') { 3165 // Updating first post of single discussion type -> updating forum intro. 3166 $forum->intro = $post->message; 3167 $forum->timemodified = time(); 3168 $DB->update_record("forum", $forum); 3169 } 3170 3171 if (isset($newpost->tags)) { 3172 core_tag_tag::set_item_tags('mod_forum', 'forum_posts', $post->id, $context, $newpost->tags); 3173 } 3174 3175 if (forum_tp_can_track_forums($forum) && forum_tp_is_tracked($forum)) { 3176 forum_tp_mark_post_read($USER->id, $post); 3177 } 3178 3179 // Let Moodle know that assessable content is uploaded (eg for plagiarism detection) 3180 forum_trigger_content_uploaded_event($post, $cm, 'forum_update_post'); 3181 3182 return true; 3183 } 3184 3185 /** 3186 * Given an object containing all the necessary data, 3187 * create a new discussion and return the id 3188 * 3189 * @param object $post 3190 * @param mixed $mform 3191 * @param string $unused 3192 * @param int $userid 3193 * @return object 3194 */ 3195 function forum_add_discussion($discussion, $mform=null, $unused=null, $userid=null) { 3196 global $USER, $CFG, $DB; 3197 3198 $timenow = isset($discussion->timenow) ? $discussion->timenow : time(); 3199 3200 if (is_null($userid)) { 3201 $userid = $USER->id; 3202 } 3203 3204 // The first post is stored as a real post, and linked 3205 // to from the discuss entry. 3206 3207 $forum = $DB->get_record('forum', array('id'=>$discussion->forum)); 3208 $cm = get_coursemodule_from_instance('forum', $forum->id); 3209 3210 $post = new stdClass(); 3211 $post->discussion = 0; 3212 $post->parent = 0; 3213 $post->privatereplyto = 0; 3214 $post->userid = $userid; 3215 $post->created = $timenow; 3216 $post->modified = $timenow; 3217 $post->mailed = FORUM_MAILED_PENDING; 3218 $post->subject = $discussion->name; 3219 $post->message = $discussion->message; 3220 $post->messageformat = $discussion->messageformat; 3221 $post->messagetrust = $discussion->messagetrust; 3222 $post->attachments = isset($discussion->attachments) ? $discussion->attachments : null; 3223 $post->forum = $forum->id; // speedup 3224 $post->course = $forum->course; // speedup 3225 $post->mailnow = $discussion->mailnow; 3226 3227 \mod_forum\local\entities\post::add_message_counts($post); 3228 $post->id = $DB->insert_record("forum_posts", $post); 3229 3230 // TODO: Fix the calling code so that there always is a $cm when this function is called 3231 if (!empty($cm->id) && !empty($discussion->itemid)) { // In "single simple discussions" this may not exist yet 3232 $context = context_module::instance($cm->id); 3233 $text = file_save_draft_area_files($discussion->itemid, $context->id, 'mod_forum', 'post', $post->id, 3234 mod_forum_post_form::editor_options($context, null), $post->message); 3235 $DB->set_field('forum_posts', 'message', $text, array('id'=>$post->id)); 3236 } 3237 3238 // Now do the main entry for the discussion, linking to this first post 3239 3240 $discussion->firstpost = $post->id; 3241 $discussion->timemodified = $timenow; 3242 $discussion->usermodified = $post->userid; 3243 $discussion->userid = $userid; 3244 $discussion->assessed = 0; 3245 3246 $post->discussion = $DB->insert_record("forum_discussions", $discussion); 3247 3248 // Finally, set the pointer on the post. 3249 $DB->set_field("forum_posts", "discussion", $post->discussion, array("id"=>$post->id)); 3250 3251 if (!empty($cm->id)) { 3252 forum_add_attachment($post, $forum, $cm, $mform, $unused); 3253 } 3254 3255 if (isset($discussion->tags)) { 3256 core_tag_tag::set_item_tags('mod_forum', 'forum_posts', $post->id, context_module::instance($cm->id), $discussion->tags); 3257 } 3258 3259 if (forum_tp_can_track_forums($forum) && forum_tp_is_tracked($forum)) { 3260 forum_tp_mark_post_read($post->userid, $post); 3261 } 3262 3263 // Let Moodle know that assessable content is uploaded (eg for plagiarism detection) 3264 if (!empty($cm->id)) { 3265 forum_trigger_content_uploaded_event($post, $cm, 'forum_add_discussion'); 3266 } 3267 3268 return $post->discussion; 3269 } 3270 3271 3272 /** 3273 * Deletes a discussion and handles all associated cleanup. 3274 * 3275 * @global object 3276 * @param object $discussion Discussion to delete 3277 * @param bool $fulldelete True when deleting entire forum 3278 * @param object $course Course 3279 * @param object $cm Course-module 3280 * @param object $forum Forum 3281 * @return bool 3282 */ 3283 function forum_delete_discussion($discussion, $fulldelete, $course, $cm, $forum) { 3284 global $DB, $CFG; 3285 require_once($CFG->libdir.'/completionlib.php'); 3286 3287 $result = true; 3288 3289 if ($posts = $DB->get_records("forum_posts", array("discussion" => $discussion->id))) { 3290 foreach ($posts as $post) { 3291 $post->course = $discussion->course; 3292 $post->forum = $discussion->forum; 3293 if (!forum_delete_post($post, 'ignore', $course, $cm, $forum, $fulldelete)) { 3294 $result = false; 3295 } 3296 } 3297 } 3298 3299 forum_tp_delete_read_records(-1, -1, $discussion->id); 3300 3301 // Discussion subscriptions must be removed before discussions because of key constraints. 3302 $DB->delete_records('forum_discussion_subs', array('discussion' => $discussion->id)); 3303 if (!$DB->delete_records("forum_discussions", array("id" => $discussion->id))) { 3304 $result = false; 3305 } 3306 3307 // Update completion state if we are tracking completion based on number of posts 3308 // But don't bother when deleting whole thing 3309 if (!$fulldelete) { 3310 $completion = new completion_info($course); 3311 if ($completion->is_enabled($cm) == COMPLETION_TRACKING_AUTOMATIC && 3312 ($forum->completiondiscussions || $forum->completionreplies || $forum->completionposts)) { 3313 $completion->update_state($cm, COMPLETION_INCOMPLETE, $discussion->userid); 3314 } 3315 } 3316 3317 $params = array( 3318 'objectid' => $discussion->id, 3319 'context' => context_module::instance($cm->id), 3320 'other' => array( 3321 'forumid' => $forum->id, 3322 ) 3323 ); 3324 $event = \mod_forum\event\discussion_deleted::create($params); 3325 $event->add_record_snapshot('forum_discussions', $discussion); 3326 $event->trigger(); 3327 3328 return $result; 3329 } 3330 3331 3332 /** 3333 * Deletes a single forum post. 3334 * 3335 * @global object 3336 * @param object $post Forum post object 3337 * @param mixed $children Whether to delete children. If false, returns false 3338 * if there are any children (without deleting the post). If true, 3339 * recursively deletes all children. If set to special value 'ignore', deletes 3340 * post regardless of children (this is for use only when deleting all posts 3341 * in a disussion). 3342 * @param object $course Course 3343 * @param object $cm Course-module 3344 * @param object $forum Forum 3345 * @param bool $skipcompletion True to skip updating completion state if it 3346 * would otherwise be updated, i.e. when deleting entire forum anyway. 3347 * @return bool 3348 */ 3349 function forum_delete_post($post, $children, $course, $cm, $forum, $skipcompletion=false) { 3350 global $DB, $CFG, $USER; 3351 require_once($CFG->libdir.'/completionlib.php'); 3352 3353 $context = context_module::instance($cm->id); 3354 3355 if ($children !== 'ignore' && ($childposts = $DB->get_records('forum_posts', array('parent'=>$post->id)))) { 3356 if ($children) { 3357 foreach ($childposts as $childpost) { 3358 forum_delete_post($childpost, true, $course, $cm, $forum, $skipcompletion); 3359 } 3360 } else { 3361 return false; 3362 } 3363 } 3364 3365 // Delete ratings. 3366 require_once($CFG->dirroot.'/rating/lib.php'); 3367 $delopt = new stdClass; 3368 $delopt->contextid = $context->id; 3369 $delopt->component = 'mod_forum'; 3370 $delopt->ratingarea = 'post'; 3371 $delopt->itemid = $post->id; 3372 $rm = new rating_manager(); 3373 $rm->delete_ratings($delopt); 3374 3375 // Delete attachments. 3376 $fs = get_file_storage(); 3377 $fs->delete_area_files($context->id, 'mod_forum', 'attachment', $post->id); 3378 $fs->delete_area_files($context->id, 'mod_forum', 'post', $post->id); 3379 3380 // Delete cached RSS feeds. 3381 if (!empty($CFG->enablerssfeeds)) { 3382 require_once($CFG->dirroot.'/mod/forum/rsslib.php'); 3383 forum_rss_delete_file($forum); 3384 } 3385 3386 if ($DB->delete_records("forum_posts", array("id" => $post->id))) { 3387 3388 forum_tp_delete_read_records(-1, $post->id); 3389 3390 // Just in case we are deleting the last post 3391 forum_discussion_update_last_post($post->discussion); 3392 3393 // Update completion state if we are tracking completion based on number of posts 3394 // But don't bother when deleting whole thing 3395 3396 if (!$skipcompletion) { 3397 $completion = new completion_info($course); 3398 if ($completion->is_enabled($cm) == COMPLETION_TRACKING_AUTOMATIC && 3399 ($forum->completiondiscussions || $forum->completionreplies || $forum->completionposts)) { 3400 $completion->update_state($cm, COMPLETION_INCOMPLETE, $post->userid); 3401 } 3402 } 3403 3404 $params = array( 3405 'context' => $context, 3406 'objectid' => $post->id, 3407 'other' => array( 3408 'discussionid' => $post->discussion, 3409 'forumid' => $forum->id, 3410 'forumtype' => $forum->type, 3411 ) 3412 ); 3413 $post->deleted = 1; 3414 if ($post->userid !== $USER->id) { 3415 $params['relateduserid'] = $post->userid; 3416 } 3417 $event = \mod_forum\event\post_deleted::create($params); 3418 $event->add_record_snapshot('forum_posts', $post); 3419 $event->trigger(); 3420 3421 return true; 3422 } 3423 return false; 3424 } 3425 3426 /** 3427 * Sends post content to plagiarism plugin 3428 * @param object $post Forum post object 3429 * @param object $cm Course-module 3430 * @param string $name 3431 * @return bool 3432 */ 3433 function forum_trigger_content_uploaded_event($post, $cm, $name) { 3434 $context = context_module::instance($cm->id); 3435 $fs = get_file_storage(); 3436 $files = $fs->get_area_files($context->id, 'mod_forum', 'attachment', $post->id, "timemodified", false); 3437 $params = array( 3438 'context' => $context, 3439 'objectid' => $post->id, 3440 'other' => array( 3441 'content' => $post->message, 3442 'pathnamehashes' => array_keys($files), 3443 'discussionid' => $post->discussion, 3444 'triggeredfrom' => $name, 3445 ) 3446 ); 3447 $event = \mod_forum\event\assessable_uploaded::create($params); 3448 $event->trigger(); 3449 return true; 3450 } 3451 3452 /** 3453 * Given a new post, subscribes or unsubscribes as appropriate. 3454 * Returns some text which describes what happened. 3455 * 3456 * @param object $fromform The submitted form 3457 * @param stdClass $forum The forum record 3458 * @param stdClass $discussion The forum discussion record 3459 * @return string 3460 */ 3461 function forum_post_subscription($fromform, $forum, $discussion) { 3462 global $USER; 3463 3464 if (\mod_forum\subscriptions::is_forcesubscribed($forum)) { 3465 return ""; 3466 } else if (\mod_forum\subscriptions::subscription_disabled($forum)) { 3467 $subscribed = \mod_forum\subscriptions::is_subscribed($USER->id, $forum); 3468 if ($subscribed && !has_capability('moodle/course:manageactivities', context_course::instance($forum->course), $USER->id)) { 3469 // This user should not be subscribed to the forum. 3470 \mod_forum\subscriptions::unsubscribe_user($USER->id, $forum); 3471 } 3472 return ""; 3473 } 3474 3475 $info = new stdClass(); 3476 $info->name = fullname($USER); 3477 $info->discussion = format_string($discussion->name); 3478 $info->forum = format_string($forum->name); 3479 3480 if (isset($fromform->discussionsubscribe) && $fromform->discussionsubscribe) { 3481 if ($result = \mod_forum\subscriptions::subscribe_user_to_discussion($USER->id, $discussion)) { 3482 return html_writer::tag('p', get_string('discussionnowsubscribed', 'forum', $info)); 3483 } 3484 } else { 3485 if ($result = \mod_forum\subscriptions::unsubscribe_user_from_discussion($USER->id, $discussion)) { 3486 return html_writer::tag('p', get_string('discussionnownotsubscribed', 'forum', $info)); 3487 } 3488 } 3489 3490 return ''; 3491 } 3492 3493 /** 3494 * Generate and return the subscribe or unsubscribe link for a forum. 3495 * 3496 * @param object $forum the forum. Fields used are $forum->id and $forum->forcesubscribe. 3497 * @param object $context the context object for this forum. 3498 * @param array $messages text used for the link in its various states 3499 * (subscribed, unsubscribed, forcesubscribed or cantsubscribe). 3500 * Any strings not passed in are taken from the $defaultmessages array 3501 * at the top of the function. 3502 * @param bool $cantaccessagroup 3503 * @param bool $unused1 3504 * @param bool $backtoindex 3505 * @param array $unused2 3506 * @return string 3507 */ 3508 function forum_get_subscribe_link($forum, $context, $messages = array(), $cantaccessagroup = false, $unused1 = true, 3509 $backtoindex = false, $unused2 = null) { 3510 global $CFG, $USER, $PAGE, $OUTPUT; 3511 $defaultmessages = array( 3512 'subscribed' => get_string('unsubscribe', 'forum'), 3513 'unsubscribed' => get_string('subscribe', 'forum'), 3514 'cantaccessgroup' => get_string('no'), 3515 'forcesubscribed' => get_string('everyoneissubscribed', 'forum'), 3516 'cantsubscribe' => get_string('disallowsubscribe','forum') 3517 ); 3518 $messages = $messages + $defaultmessages; 3519 3520 if (\mod_forum\subscriptions::is_forcesubscribed($forum)) { 3521 return $messages['forcesubscribed']; 3522 } else if (\mod_forum\subscriptions::subscription_disabled($forum) && 3523 !has_capability('mod/forum:managesubscriptions', $context)) { 3524 return $messages['cantsubscribe']; 3525 } else if ($cantaccessagroup) { 3526 return $messages['cantaccessgroup']; 3527 } else { 3528 if (!is_enrolled($context, $USER, '', true)) { 3529 return ''; 3530 } 3531 3532 $subscribed = \mod_forum\subscriptions::is_subscribed($USER->id, $forum); 3533 if ($subscribed) { 3534 $linktext = $messages['subscribed']; 3535 $linktitle = get_string('subscribestop', 'forum'); 3536 } else { 3537 $linktext = $messages['unsubscribed']; 3538 $linktitle = get_string('subscribestart', 'forum'); 3539 } 3540 3541 $options = array(); 3542 if ($backtoindex) { 3543 $backtoindexlink = '&backtoindex=1'; 3544 $options['backtoindex'] = 1; 3545 } else { 3546 $backtoindexlink = ''; 3547 } 3548 3549 $options['id'] = $forum->id; 3550 $options['sesskey'] = sesskey(); 3551 $url = new moodle_url('/mod/forum/subscribe.php', $options); 3552 return $OUTPUT->single_button($url, $linktext, 'get', array('title' => $linktitle)); 3553 } 3554 } 3555 3556 /** 3557 * Returns true if user created new discussion already. 3558 * 3559 * @param int $forumid The forum to check for postings 3560 * @param int $userid The user to check for postings 3561 * @param int $groupid The group to restrict the check to 3562 * @return bool 3563 */ 3564 function forum_user_has_posted_discussion($forumid, $userid, $groupid = null) { 3565 global $CFG, $DB; 3566 3567 $sql = "SELECT 'x' 3568 FROM {forum_discussions} d, {forum_posts} p 3569 WHERE d.forum = ? AND p.discussion = d.id AND p.parent = 0 AND p.userid = ?"; 3570 3571 $params = [$forumid, $userid]; 3572 3573 if ($groupid) { 3574 $sql .= " AND d.groupid = ?"; 3575 $params[] = $groupid; 3576 } 3577 3578 return $DB->record_exists_sql($sql, $params); 3579 } 3580 3581 /** 3582 * @global object 3583 * @global object 3584 * @param int $forumid 3585 * @param int $userid 3586 * @return array 3587 */ 3588 function forum_discussions_user_has_posted_in($forumid, $userid) { 3589 global $CFG, $DB; 3590 3591 $haspostedsql = "SELECT d.id AS id, 3592 d.* 3593 FROM {forum_posts} p, 3594 {forum_discussions} d 3595 WHERE p.discussion = d.id 3596 AND d.forum = ? 3597 AND p.userid = ?"; 3598 3599 return $DB->get_records_sql($haspostedsql, array($forumid, $userid)); 3600 } 3601 3602 /** 3603 * @global object 3604 * @global object 3605 * @param int $forumid 3606 * @param int $did 3607 * @param int $userid 3608 * @return bool 3609 */ 3610 function forum_user_has_posted($forumid, $did, $userid) { 3611 global $DB; 3612 3613 if (empty($did)) { 3614 // posted in any forum discussion? 3615 $sql = "SELECT 'x' 3616 FROM {forum_posts} p 3617 JOIN {forum_discussions} d ON d.id = p.discussion 3618 WHERE p.userid = :userid AND d.forum = :forumid"; 3619 return $DB->record_exists_sql($sql, array('forumid'=>$forumid,'userid'=>$userid)); 3620 } else { 3621 return $DB->record_exists('forum_posts', array('discussion'=>$did,'userid'=>$userid)); 3622 } 3623 } 3624 3625 /** 3626 * Returns creation time of the first user's post in given discussion 3627 * @global object $DB 3628 * @param int $did Discussion id 3629 * @param int $userid User id 3630 * @return int|bool post creation time stamp or return false 3631 */ 3632 function forum_get_user_posted_time($did, $userid) { 3633 global $DB; 3634 3635 $posttime = $DB->get_field('forum_posts', 'MIN(created)', array('userid'=>$userid, 'discussion'=>$did)); 3636 if (empty($posttime)) { 3637 return false; 3638 } 3639 return $posttime; 3640 } 3641 3642 /** 3643 * @global object 3644 * @param object $forum 3645 * @param object $currentgroup 3646 * @param int $unused 3647 * @param object $cm 3648 * @param object $context 3649 * @return bool 3650 */ 3651 function forum_user_can_post_discussion($forum, $currentgroup=null, $unused=-1, $cm=NULL, $context=NULL) { 3652 // $forum is an object 3653 global $USER; 3654 3655 // shortcut - guest and not-logged-in users can not post 3656 if (isguestuser() or !isloggedin()) { 3657 return false; 3658 } 3659 3660 if (!$cm) { 3661 debugging('missing cm', DEBUG_DEVELOPER); 3662 if (!$cm = get_coursemodule_from_instance('forum', $forum->id, $forum->course)) { 3663<