mod/forum/discuss.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * Displays a post, and all the posts below it.
  20  * If no post is given, displays all posts in a discussion
  21  *
  22  * @package   mod_forum
  23  * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
  24  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25  */
  26
  27 require_once('../../config.php');
  28
  29 $d      = required_param('d', PARAM_INT);                // Discussion ID
  30 $parent = optional_param('parent', 0, PARAM_INT);        // If set, then display this post and all children.
  31 $mode   = optional_param('mode', 0, PARAM_INT);          // If set, changes the layout of the thread
  32 $move   = optional_param('move', 0, PARAM_INT);          // If set, moves this discussion to another forum
  33 $mark   = optional_param('mark', '', PARAM_ALPHA);       // Used for tracking read posts if user initiated.
  34 $postid = optional_param('postid', 0, PARAM_INT);        // Used for tracking read posts if user initiated.
  35 $pin    = optional_param('pin', -1, PARAM_INT);          // If set, pin or unpin this discussion.
  36
  37 $url = new moodle_url('/mod/forum/discuss.php', array('d'=>$d));
  38 if ($parent !== 0) {
  39     $url->param('parent', $parent);
  40 }
  41 $PAGE->set_url($url);
  42
  43 $vaultfactory = mod_forum\local\container::get_vault_factory();
  44 $discussionvault = $vaultfactory->get_discussion_vault();
  45 $discussion = $discussionvault->get_from_id($d);
  46
  47 if (!$discussion) {
  48     throw new \moodle_exception('Unable to find discussion with id ' . $discussionid);
  49 }
  50
  51 $forumvault = $vaultfactory->get_forum_vault();
  52 $forum = $forumvault->get_from_id($discussion->get_forum_id());
  53
  54 if (!$forum) {
  55     throw new \moodle_exception('Unable to find forum with id ' . $discussion->get_forum_id());
  56 }
  57
  58 $course = $forum->get_course_record();
  59 $cm = $forum->get_course_module_record();
  60
  61 require_course_login($course, true, $cm);
  62
  63 $managerfactory = mod_forum\local\container::get_manager_factory();
  64 $capabilitymanager = $managerfactory->get_capability_manager($forum);
  65 $urlfactory = mod_forum\local\container::get_url_factory();
  66
  67 // Make sure we can render.
  68 if (!$capabilitymanager->can_view_discussions($USER)) {
  69     throw new moodle_exception('noviewdiscussionspermission', 'mod_forum');
  70 }
  71
  72 $datamapperfactory = mod_forum\local\container::get_legacy_data_mapper_factory();
  73 $forumdatamapper = $datamapperfactory->get_forum_data_mapper();
  74 $forumrecord = $forumdatamapper->to_legacy_object($forum);
  75 $discussiondatamapper = $datamapperfactory->get_discussion_data_mapper();
  76 $discussionrecord = $discussiondatamapper->to_legacy_object($discussion);
  77 $discussionviewurl = $urlfactory->get_discussion_view_url_from_discussion($discussion);
  78
  79 // move this down fix for MDL-6926
  80 require_once($CFG->dirroot . '/mod/forum/lib.php');
  81
  82 $modcontext = $forum->get_context();
  83
  84 if (
  85     !empty($CFG->enablerssfeeds) &&
  86     !empty($CFG->forum_enablerssfeeds) &&
  87     $forum->get_rss_type() &&
  88     $forum->get_rss_articles()
  89 ) {
  90     require_once("$CFG->libdir/rsslib.php");
  91
  92     $rsstitle = format_string(
  93         $course->shortname,
  94         true,
  95         ['context' => context_course::instance($course->id)]
  96     );
  97     $rsstitle .= ': ' . format_string($forum->get_name());
  98     rss_add_http_header($modcontext, 'mod_forum', $forumrecord, $rsstitle);
  99 }
 100
 101 // Move discussion if requested.
 102 if ($move > 0 && confirm_sesskey()) {
 103     $forumid = $forum->get_id();
 104     $discussionid = $discussion->get_id();
 105     $return = $discussionviewurl->out(false);
 106
 107     if (!$forumto = $DB->get_record('forum', ['id' => $move])) {
 108         print_error('cannotmovetonotexist', 'forum', $return);
 109     }
 110
 111     if (!$capabilitymanager->can_move_discussions($USER)) {
 112         if ($forum->get_type() == 'single') {
 113             print_error('cannotmovefromsingleforum', 'forum', $return);
 114         } else {
 115             print_error('nopermissions', 'error', $return, get_capability_string('mod/forum:movediscussions'));
 116         }
 117     }
 118
 119     if ($forumto->type == 'single') {
 120         print_error('cannotmovetosingleforum', 'forum', $return);
 121     }
 122
 123     // Get target forum cm and check it is visible to current user.
 124     $modinfo = get_fast_modinfo($course);
 125     $forums = $modinfo->get_instances_of('forum');
 126     if (!array_key_exists($forumto->id, $forums)) {
 127         print_error('cannotmovetonotfound', 'forum', $return);
 128     }
 129
 130     $cmto = $forums[$forumto->id];
 131     if (!$cmto->uservisible) {
 132         print_error('cannotmovenotvisible', 'forum', $return);
 133     }
 134
 135     $destinationctx = context_module::instance($cmto->id);
 136     require_capability('mod/forum:startdiscussion', $destinationctx);
 137
 138     if (!forum_move_attachments($discussionrecord, $forumid, $forumto->id)) {
 139         echo $OUTPUT->notification("Errors occurred while moving attachment directories - check your file permissions");
 140     }
 141     // For each subscribed user in this forum and discussion, copy over per-discussion subscriptions if required.
 142     $discussiongroup = $discussion->get_group_id() == -1 ? 0 : $discussion->get_group_id();
 143     $potentialsubscribers = \mod_forum\subscriptions::fetch_subscribed_users(
 144         $forumrecord,
 145         $discussiongroup,
 146         $modcontext,
 147         'u.id',
 148         true
 149     );
 150
 151     // Pre-seed the subscribed_discussion caches.
 152     // Firstly for the forum being moved to.
 153     \mod_forum\subscriptions::fill_subscription_cache($forumto->id);
 154     // And also for the discussion being moved.
 155     \mod_forum\subscriptions::fill_subscription_cache($forumid);
 156     $subscriptionchanges = [];
 157     $subscriptiontime = time();
 158     foreach ($potentialsubscribers as $subuser) {
 159         $userid = $subuser->id;
 160         $targetsubscription = \mod_forum\subscriptions::is_subscribed($userid, $forumto, null, $cmto);
 161         $discussionsubscribed = \mod_forum\subscriptions::is_subscribed($userid, $forumrecord, $discussionid);
 162         $forumsubscribed = \mod_forum\subscriptions::is_subscribed($userid, $forumrecord);
 163
 164         if ($forumsubscribed && !$discussionsubscribed && $targetsubscription) {
 165             // The user has opted out of this discussion and the move would cause them to receive notifications again.
 166             // Ensure they are unsubscribed from the discussion still.
 167             $subscriptionchanges[$userid] = \mod_forum\subscriptions::FORUM_DISCUSSION_UNSUBSCRIBED;
 168         } else if (!$forumsubscribed && $discussionsubscribed && !$targetsubscription) {
 169             // The user has opted into this discussion and would otherwise not receive the subscription after the move.
 170             // Ensure they are subscribed to the discussion still.
 171             $subscriptionchanges[$userid] = $subscriptiontime;
 172         }
 173     }
 174
 175     $DB->set_field('forum_discussions', 'forum', $forumto->id, ['id' => $discussionid]);
 176     $DB->set_field('forum_read', 'forumid', $forumto->id, ['discussionid' => $discussionid]);
 177
 178     // Delete the existing per-discussion subscriptions and replace them with the newly calculated ones.
 179     $DB->delete_records('forum_discussion_subs', ['discussion' => $discussionid]);
 180     $newdiscussion = clone $discussionrecord;
 181     $newdiscussion->forum = $forumto->id;
 182     foreach ($subscriptionchanges as $userid => $preference) {
 183         if ($preference != \mod_forum\subscriptions::FORUM_DISCUSSION_UNSUBSCRIBED) {
 184             // Users must have viewdiscussion to a discussion.
 185             if (has_capability('mod/forum:viewdiscussion', $destinationctx, $userid)) {
 186                 \mod_forum\subscriptions::subscribe_user_to_discussion($userid, $newdiscussion, $destinationctx);
 187             }
 188         } else {
 189             \mod_forum\subscriptions::unsubscribe_user_from_discussion($userid, $newdiscussion, $destinationctx);
 190         }
 191     }
 192
 193     $params = [
 194         'context' => $destinationctx,
 195         'objectid' => $discussionid,
 196         'other' => [
 197             'fromforumid' => $forumid,
 198             'toforumid' => $forumto->id,
 199         ]
 200     ];
 201     $event = \mod_forum\event\discussion_moved::create($params);
 202     $event->add_record_snapshot('forum_discussions', $discussionrecord);
 203     $event->add_record_snapshot('forum', $forumrecord);
 204     $event->add_record_snapshot('forum', $forumto);
 205     $event->trigger();
 206
 207     // Delete the RSS files for the 2 forums to force regeneration of the feeds
 208     require_once($CFG->dirroot . '/mod/forum/rsslib.php');
 209     forum_rss_delete_file($forumrecord);
 210     forum_rss_delete_file($forumto);
 211
 212     redirect($return . '&move=-1&sesskey=' . sesskey());
 213 }
 214 // Pin or unpin discussion if requested.
 215 if ($pin !== -1 && confirm_sesskey()) {
 216     if (!$capabilitymanager->can_pin_discussions($USER)) {
 217         print_error('nopermissions', 'error', $return, get_capability_string('mod/forum:pindiscussions'));
 218     }
 219
 220     $params = ['context' => $modcontext, 'objectid' => $discussion->get_id(), 'other' => ['forumid' => $forum->get_id()]];
 221
 222     switch ($pin) {
 223         case FORUM_DISCUSSION_PINNED:
 224             // Pin the discussion and trigger discussion pinned event.
 225             forum_discussion_pin($modcontext, $forumrecord, $discussionrecord);
 226             break;
 227         case FORUM_DISCUSSION_UNPINNED:
 228             // Unpin the discussion and trigger discussion unpinned event.
 229             forum_discussion_unpin($modcontext, $forumrecord, $discussionrecord);
 230             break;
 231         default:
 232             echo $OUTPUT->notification("Invalid value when attempting to pin/unpin discussion");
 233             break;
 234     }
 235
 236     redirect($discussionviewurl->out(false));
 237 }
 238
 239 // Trigger discussion viewed event.
 240 forum_discussion_view($modcontext, $forumrecord, $discussionrecord);
 241
 242 unset($SESSION->fromdiscussion);
 243
 244 if ($mode) {
 245     set_user_preference('forum_displaymode', $mode);
 246 }
 247
 248 $displaymode = get_user_preferences('forum_displaymode', $CFG->forum_displaymode);
 249
 250 if ($parent) {
 251     // If flat AND parent, then force nested display this time
 252     if ($displaymode == FORUM_MODE_FLATOLDEST or $displaymode == FORUM_MODE_FLATNEWEST) {
 253         $displaymode = FORUM_MODE_NESTED;
 254     }
 255 } else {
 256     $parent = $discussion->get_first_post_id();
 257 }
 258
 259 $postvault = $vaultfactory->get_post_vault();
 260 if (!$post = $postvault->get_from_id($parent)) {
 261     print_error("notexists", 'forum', "$CFG->wwwroot/mod/forum/view.php?f={$forum->get_id()}");
 262 }
 263
 264 if (!$capabilitymanager->can_view_post($USER, $discussion, $post)) {
 265     print_error('noviewdiscussionspermission', 'forum', "$CFG->wwwroot/mod/forum/view.php?id={$forum->get_id()}");
 266 }
 267
 268 $istracked = forum_tp_is_tracked($forumrecord, $USER);
 269 if ($mark == 'read'|| $mark == 'unread') {
 270     if ($CFG->forum_usermarksread && forum_tp_can_track_forums($forumrecord) && $istracked) {
 271         if ($mark == 'read') {
 272             forum_tp_add_read_record($USER->id, $postid);
 273         } else {
 274             // unread
 275             forum_tp_delete_read_records($USER->id, $postid);
 276         }
 277     }
 278 }
 279
 280 $searchform = forum_search_form($course);
 281
 282 $forumnode = $PAGE->navigation->find($cm->id, navigation_node::TYPE_ACTIVITY);
 283 if (empty($forumnode)) {
 284     $forumnode = $PAGE->navbar;
 285 } else {
 286     $forumnode->make_active();
 287 }
 288 $node = $forumnode->add(format_string($discussion->get_name()), $discussionviewurl);
 289 $node->display = false;
 290 if ($node && $post->get_id() != $discussion->get_first_post_id()) {
 291     $node->add(format_string($post->get_subject()), $PAGE->url);
 292 }
 293
 294 $PAGE->set_title("$course->shortname: " . format_string($discussion->get_name()));
 295 $PAGE->set_heading($course->fullname);
 296 $PAGE->set_button(forum_search_form($course));
 297
 298 echo $OUTPUT->header();
 299 echo $OUTPUT->heading(format_string($forum->get_name()), 2);
 300 echo $OUTPUT->heading(format_string($discussion->get_name()), 3, 'discussionname');
 301
 302 $rendererfactory = mod_forum\local\container::get_renderer_factory();
 303 $discussionrenderer = $rendererfactory->get_discussion_renderer($forum, $discussion, $displaymode);
 304 $orderpostsby = $displaymode == FORUM_MODE_FLATNEWEST ? 'created DESC' : 'created ASC';
 305 $replies = $postvault->get_replies_to_post($USER, $post, $capabilitymanager->can_view_any_private_reply($USER), $orderpostsby);
 306 $postids = array_map(function($post) {
 307     return $post->get_id();
 308 }, array_merge([$post], array_values($replies)));
 309
 310 if ($move == -1 and confirm_sesskey()) {
 311     $forumname = format_string($forum->get_name(), true);
 312     echo $OUTPUT->notification(get_string('discussionmoved', 'forum', $forumname), 'notifysuccess');
 313 }
 314
 315 echo $discussionrenderer->render($USER, $post, $replies);
 316 echo $OUTPUT->footer();
 317
 318 if ($istracked && !$CFG->forum_usermarksread) {
 319     forum_tp_mark_posts_read($USER, $postids);
 320 }