mirror of
https://github.com/moodle/moodle.git
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364 lines
15 KiB
PHP
364 lines
15 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Displays a post, and all the posts below it.
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* If no post is given, displays all posts in a discussion
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*
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* @package mod_forum
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* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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require_once('../../config.php');
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$d = required_param('d', PARAM_INT); // Discussion ID
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$parent = optional_param('parent', 0, PARAM_INT); // If set, then display this post and all children.
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$mode = optional_param('mode', 0, PARAM_INT); // If set, changes the layout of the thread
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$move = optional_param('move', 0, PARAM_INT); // If set, moves this discussion to another forum
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$mark = optional_param('mark', '', PARAM_ALPHA); // Used for tracking read posts if user initiated.
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$postid = optional_param('postid', 0, PARAM_INT); // Used for tracking read posts if user initiated.
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$url = new moodle_url('/mod/forum/discuss.php', array('d'=>$d));
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if ($parent !== 0) {
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$url->param('parent', $parent);
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}
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$PAGE->set_url($url);
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$discussion = $DB->get_record('forum_discussions', array('id' => $d), '*', MUST_EXIST);
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$course = $DB->get_record('course', array('id' => $discussion->course), '*', MUST_EXIST);
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$forum = $DB->get_record('forum', array('id' => $discussion->forum), '*', MUST_EXIST);
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$cm = get_coursemodule_from_instance('forum', $forum->id, $course->id, false, MUST_EXIST);
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require_course_login($course, true, $cm);
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// move this down fix for MDL-6926
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require_once($CFG->dirroot.'/mod/forum/lib.php');
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$modcontext = context_module::instance($cm->id);
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require_capability('mod/forum:viewdiscussion', $modcontext, NULL, true, 'noviewdiscussionspermission', 'forum');
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if (!empty($CFG->enablerssfeeds) && !empty($CFG->forum_enablerssfeeds) && $forum->rsstype && $forum->rssarticles) {
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require_once("$CFG->libdir/rsslib.php");
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$rsstitle = format_string($course->shortname, true, array('context' => context_course::instance($course->id))) . ': ' . format_string($forum->name);
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rss_add_http_header($modcontext, 'mod_forum', $forum, $rsstitle);
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}
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// Move discussion if requested.
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if ($move > 0 and confirm_sesskey()) {
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$return = $CFG->wwwroot.'/mod/forum/discuss.php?d='.$discussion->id;
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if (!$forumto = $DB->get_record('forum', array('id' => $move))) {
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print_error('cannotmovetonotexist', 'forum', $return);
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}
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require_capability('mod/forum:movediscussions', $modcontext);
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if ($forum->type == 'single') {
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print_error('cannotmovefromsingleforum', 'forum', $return);
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}
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if (!$forumto = $DB->get_record('forum', array('id' => $move))) {
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print_error('cannotmovetonotexist', 'forum', $return);
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}
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if ($forumto->type == 'single') {
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print_error('cannotmovetosingleforum', 'forum', $return);
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}
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// Get target forum cm and check it is visible to current user.
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$modinfo = get_fast_modinfo($course);
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$forums = $modinfo->get_instances_of('forum');
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if (!array_key_exists($forumto->id, $forums)) {
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print_error('cannotmovetonotfound', 'forum', $return);
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}
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$cmto = $forums[$forumto->id];
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if (!$cmto->uservisible) {
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print_error('cannotmovenotvisible', 'forum', $return);
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}
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$destinationctx = context_module::instance($cmto->id);
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require_capability('mod/forum:startdiscussion', $destinationctx);
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if (!forum_move_attachments($discussion, $forum->id, $forumto->id)) {
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echo $OUTPUT->notification("Errors occurred while moving attachment directories - check your file permissions");
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}
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// For each subscribed user in this forum and discussion, copy over per-discussion subscriptions if required.
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$discussiongroup = $discussion->groupid == -1 ? 0 : $discussion->groupid;
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$potentialsubscribers = \mod_forum\subscriptions::fetch_subscribed_users(
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$forum,
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$discussiongroup,
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$modcontext,
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'u.id',
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true
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);
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// Pre-seed the subscribed_discussion caches.
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// Firstly for the forum being moved to.
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\mod_forum\subscriptions::fill_subscription_cache($forumto->id);
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// And also for the discussion being moved.
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\mod_forum\subscriptions::fill_subscription_cache($forum->id);
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$subscriptionchanges = array();
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$subscriptiontime = time();
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foreach ($potentialsubscribers as $subuser) {
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$userid = $subuser->id;
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$targetsubscription = \mod_forum\subscriptions::is_subscribed($userid, $forumto, null, $cmto);
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$discussionsubscribed = \mod_forum\subscriptions::is_subscribed($userid, $forum, $discussion->id);
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$forumsubscribed = \mod_forum\subscriptions::is_subscribed($userid, $forum);
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if ($forumsubscribed && !$discussionsubscribed && $targetsubscription) {
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// The user has opted out of this discussion and the move would cause them to receive notifications again.
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// Ensure they are unsubscribed from the discussion still.
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$subscriptionchanges[$userid] = \mod_forum\subscriptions::FORUM_DISCUSSION_UNSUBSCRIBED;
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} else if (!$forumsubscribed && $discussionsubscribed && !$targetsubscription) {
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// The user has opted into this discussion and would otherwise not receive the subscription after the move.
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// Ensure they are subscribed to the discussion still.
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$subscriptionchanges[$userid] = $subscriptiontime;
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}
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}
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$DB->set_field('forum_discussions', 'forum', $forumto->id, array('id' => $discussion->id));
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$DB->set_field('forum_read', 'forumid', $forumto->id, array('discussionid' => $discussion->id));
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// Delete the existing per-discussion subscriptions and replace them with the newly calculated ones.
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$DB->delete_records('forum_discussion_subs', array('discussion' => $discussion->id));
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$newdiscussion = clone $discussion;
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$newdiscussion->forum = $forumto->id;
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foreach ($subscriptionchanges as $userid => $preference) {
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if ($preference != \mod_forum\subscriptions::FORUM_DISCUSSION_UNSUBSCRIBED) {
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// Users must have viewdiscussion to a discussion.
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if (has_capability('mod/forum:viewdiscussion', $destinationctx, $userid)) {
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\mod_forum\subscriptions::subscribe_user_to_discussion($userid, $newdiscussion, $destinationctx);
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}
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} else {
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\mod_forum\subscriptions::unsubscribe_user_from_discussion($userid, $newdiscussion, $destinationctx);
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}
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}
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$params = array(
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'context' => $destinationctx,
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'objectid' => $discussion->id,
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'other' => array(
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'fromforumid' => $forum->id,
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'toforumid' => $forumto->id,
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)
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);
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$event = \mod_forum\event\discussion_moved::create($params);
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$event->add_record_snapshot('forum_discussions', $discussion);
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$event->add_record_snapshot('forum', $forum);
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$event->add_record_snapshot('forum', $forumto);
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$event->trigger();
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// Delete the RSS files for the 2 forums to force regeneration of the feeds
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require_once($CFG->dirroot.'/mod/forum/rsslib.php');
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forum_rss_delete_file($forum);
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forum_rss_delete_file($forumto);
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redirect($return.'&moved=-1&sesskey='.sesskey());
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}
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// Trigger discussion viewed event.
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forum_discussion_view($modcontext, $forum, $discussion);
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unset($SESSION->fromdiscussion);
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if ($mode) {
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set_user_preference('forum_displaymode', $mode);
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}
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$displaymode = get_user_preferences('forum_displaymode', $CFG->forum_displaymode);
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if ($parent) {
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// If flat AND parent, then force nested display this time
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if ($displaymode == FORUM_MODE_FLATOLDEST or $displaymode == FORUM_MODE_FLATNEWEST) {
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$displaymode = FORUM_MODE_NESTED;
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}
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} else {
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$parent = $discussion->firstpost;
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}
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if (! $post = forum_get_post_full($parent)) {
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print_error("notexists", 'forum', "$CFG->wwwroot/mod/forum/view.php?f=$forum->id");
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}
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if (!forum_user_can_see_post($forum, $discussion, $post, null, $cm)) {
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print_error('noviewdiscussionspermission', 'forum', "$CFG->wwwroot/mod/forum/view.php?id=$forum->id");
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}
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if ($mark == 'read' or $mark == 'unread') {
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if ($CFG->forum_usermarksread && forum_tp_can_track_forums($forum) && forum_tp_is_tracked($forum)) {
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if ($mark == 'read') {
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forum_tp_add_read_record($USER->id, $postid);
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} else {
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// unread
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forum_tp_delete_read_records($USER->id, $postid);
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}
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}
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}
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$searchform = forum_search_form($course);
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$forumnode = $PAGE->navigation->find($cm->id, navigation_node::TYPE_ACTIVITY);
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if (empty($forumnode)) {
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$forumnode = $PAGE->navbar;
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} else {
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$forumnode->make_active();
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}
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$node = $forumnode->add(format_string($discussion->name), new moodle_url('/mod/forum/discuss.php', array('d'=>$discussion->id)));
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$node->display = false;
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if ($node && $post->id != $discussion->firstpost) {
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$node->add(format_string($post->subject), $PAGE->url);
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}
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$PAGE->set_title("$course->shortname: ".format_string($discussion->name));
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$PAGE->set_heading($course->fullname);
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$PAGE->set_button($searchform);
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$renderer = $PAGE->get_renderer('mod_forum');
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echo $OUTPUT->header();
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echo $OUTPUT->heading(format_string($forum->name), 2);
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echo $OUTPUT->heading(format_string($discussion->name), 3, 'discussionname');
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// is_guest should be used here as this also checks whether the user is a guest in the current course.
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// Guests and visitors cannot subscribe - only enrolled users.
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if ((!is_guest($modcontext, $USER) && isloggedin()) && has_capability('mod/forum:viewdiscussion', $modcontext)) {
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// Discussion subscription.
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if (\mod_forum\subscriptions::is_subscribable($forum)) {
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echo html_writer::div(
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forum_get_discussion_subscription_icon($forum, $post->discussion, null, true),
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'discussionsubscription'
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);
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echo forum_get_discussion_subscription_icon_preloaders();
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}
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}
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/// Check to see if groups are being used in this forum
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/// If so, make sure the current person is allowed to see this discussion
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/// Also, if we know they should be able to reply, then explicitly set $canreply for performance reasons
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$canreply = forum_user_can_post($forum, $discussion, $USER, $cm, $course, $modcontext);
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if (!$canreply and $forum->type !== 'news') {
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if (isguestuser() or !isloggedin()) {
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$canreply = true;
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}
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if (!is_enrolled($modcontext) and !is_viewing($modcontext)) {
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// allow guests and not-logged-in to see the link - they are prompted to log in after clicking the link
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// normal users with temporary guest access see this link too, they are asked to enrol instead
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$canreply = enrol_selfenrol_available($course->id);
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}
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}
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// Output the links to neighbour discussions.
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$neighbours = forum_get_discussion_neighbours($cm, $discussion);
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$neighbourlinks = $renderer->neighbouring_discussion_navigation($neighbours['prev'], $neighbours['next']);
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echo $neighbourlinks;
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/// Print the controls across the top
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echo '<div class="discussioncontrols clearfix">';
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if (!empty($CFG->enableportfolios) && has_capability('mod/forum:exportdiscussion', $modcontext)) {
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require_once($CFG->libdir.'/portfoliolib.php');
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$button = new portfolio_add_button();
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$button->set_callback_options('forum_portfolio_caller', array('discussionid' => $discussion->id), 'mod_forum');
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$button = $button->to_html(PORTFOLIO_ADD_FULL_FORM, get_string('exportdiscussion', 'mod_forum'));
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$buttonextraclass = '';
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if (empty($button)) {
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// no portfolio plugin available.
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$button = ' ';
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$buttonextraclass = ' noavailable';
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}
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echo html_writer::tag('div', $button, array('class' => 'discussioncontrol exporttoportfolio'.$buttonextraclass));
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} else {
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echo html_writer::tag('div', ' ', array('class'=>'discussioncontrol nullcontrol'));
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}
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// groups selector not needed here
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echo '<div class="discussioncontrol displaymode">';
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forum_print_mode_form($discussion->id, $displaymode);
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echo "</div>";
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if ($forum->type != 'single'
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&& has_capability('mod/forum:movediscussions', $modcontext)) {
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echo '<div class="discussioncontrol movediscussion">';
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// Popup menu to move discussions to other forums. The discussion in a
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// single discussion forum can't be moved.
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$modinfo = get_fast_modinfo($course);
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if (isset($modinfo->instances['forum'])) {
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$forummenu = array();
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// Check forum types and eliminate simple discussions.
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$forumcheck = $DB->get_records('forum', array('course' => $course->id),'', 'id, type');
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foreach ($modinfo->instances['forum'] as $forumcm) {
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if (!$forumcm->uservisible || !has_capability('mod/forum:startdiscussion',
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context_module::instance($forumcm->id))) {
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continue;
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}
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$section = $forumcm->sectionnum;
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$sectionname = get_section_name($course, $section);
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if (empty($forummenu[$section])) {
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$forummenu[$section] = array($sectionname => array());
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}
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$forumidcompare = $forumcm->instance != $forum->id;
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$forumtypecheck = $forumcheck[$forumcm->instance]->type !== 'single';
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if ($forumidcompare and $forumtypecheck) {
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$url = "/mod/forum/discuss.php?d=$discussion->id&move=$forumcm->instance&sesskey=".sesskey();
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$forummenu[$section][$sectionname][$url] = format_string($forumcm->name);
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}
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}
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if (!empty($forummenu)) {
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echo '<div class="movediscussionoption">';
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$select = new url_select($forummenu, '',
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array(''=>get_string("movethisdiscussionto", "forum")),
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'forummenu', get_string('move'));
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echo $OUTPUT->render($select);
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echo "</div>";
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}
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}
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echo "</div>";
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}
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echo '<div class="clearfloat"> </div>';
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echo "</div>";
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if (!empty($forum->blockafter) && !empty($forum->blockperiod)) {
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$a = new stdClass();
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$a->blockafter = $forum->blockafter;
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$a->blockperiod = get_string('secondstotime'.$forum->blockperiod);
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echo $OUTPUT->notification(get_string('thisforumisthrottled','forum',$a));
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}
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if ($forum->type == 'qanda' && !has_capability('mod/forum:viewqandawithoutposting', $modcontext) &&
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!forum_user_has_posted($forum->id,$discussion->id,$USER->id)) {
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echo $OUTPUT->notification(get_string('qandanotify','forum'));
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}
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if ($move == -1 and confirm_sesskey()) {
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echo $OUTPUT->notification(get_string('discussionmoved', 'forum', format_string($forum->name,true)));
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}
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$canrate = has_capability('mod/forum:rate', $modcontext);
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forum_print_discussion($course, $cm, $forum, $discussion, $post, $displaymode, $canreply, $canrate);
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echo $neighbourlinks;
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// Add the subscription toggle JS.
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$PAGE->requires->yui_module('moodle-mod_forum-subscriptiontoggle', 'Y.M.mod_forum.subscriptiontoggle.init');
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echo $OUTPUT->footer();
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