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
  36     $url = new moodle_url('/mod/forum/discuss.php', array('d'=>$d));
  37     if ($parent !== 0) {
  38         $url->param('parent', $parent);
  39     }
  40     $PAGE->set_url($url);
  41
  42     $discussion = $DB->get_record('forum_discussions', array('id' => $d), '*', MUST_EXIST);
  43     $course = $DB->get_record('course', array('id' => $discussion->course), '*', MUST_EXIST);
  44     $forum = $DB->get_record('forum', array('id' => $discussion->forum), '*', MUST_EXIST);
  45     $cm = get_coursemodule_from_instance('forum', $forum->id, $course->id, false, MUST_EXIST);
  46
  47     require_course_login($course, true, $cm);
  48
  49 /// Add ajax-related libs
  50     $PAGE->requires->yui2_lib('event');
  51     $PAGE->requires->yui2_lib('connection');
  52     $PAGE->requires->yui2_lib('json');
  53
  54     // move this down fix for MDL-6926
  55     require_once($CFG->dirroot.'/mod/forum/lib.php');
  56
  57     $modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
  58     require_capability('mod/forum:viewdiscussion', $modcontext, NULL, true, 'noviewdiscussionspermission', 'forum');
  59
  60     if (!empty($CFG->enablerssfeeds) && !empty($CFG->forum_enablerssfeeds) && $forum->rsstype && $forum->rssarticles) {
  61         require_once("$CFG->libdir/rsslib.php");
  62
  63         $rsstitle = format_string($course->shortname) . ': %fullname%';
  64         rss_add_http_header($modcontext, 'mod_forum', $forum, $rsstitle);
  65     }
  66
  67     if ($forum->type == 'news') {
  68         if (!($USER->id == $discussion->userid || (($discussion->timestart == 0
  69             || $discussion->timestart <= time())
  70             && ($discussion->timeend == 0 || $discussion->timeend > time())))) {
  71             print_error('invaliddiscussionid', 'forum', "$CFG->wwwroot/mod/forum/view.php?f=$forum->id");
  72         }
  73     }
  74
  75 /// move discussion if requested
  76     if ($move > 0 and confirm_sesskey()) {
  77         $return = $CFG->wwwroot.'/mod/forum/discuss.php?d='.$discussion->id;
  78
  79         require_capability('mod/forum:movediscussions', $modcontext);
  80
  81         if ($forum->type == 'single') {
  82             print_error('cannotmovefromsingleforum', 'forum', $return);
  83         }
  84
  85         if (!$forumto = $DB->get_record('forum', array('id' => $move))) {
  86             print_error('cannotmovetonotexist', 'forum', $return);
  87         }
  88
  89         if (!$cmto = get_coursemodule_from_instance('forum', $forumto->id, $course->id)) {
  90             print_error('cannotmovetonotfound', 'forum', $return);
  91         }
  92
  93         if (!coursemodule_visible_for_user($cmto)) {
  94             print_error('cannotmovenotvisible', 'forum', $return);
  95         }
  96
  97         require_capability('mod/forum:startdiscussion', get_context_instance(CONTEXT_MODULE,$cmto->id));
  98
  99         if (!forum_move_attachments($discussion, $forum->id, $forumto->id)) {
 100             echo $OUTPUT->notification("Errors occurred while moving attachment directories - check your file permissions");
 101         }
 102         $DB->set_field('forum_discussions', 'forum', $forumto->id, array('id' => $discussion->id));
 103         $DB->set_field('forum_read', 'forumid', $forumto->id, array('discussionid' => $discussion->id));
 104         add_to_log($course->id, 'forum', 'move discussion', "discuss.php?d=$discussion->id", $discussion->id, $cmto->id);
 105
 106         require_once($CFG->libdir.'/rsslib.php');
 107         require_once($CFG->dirroot.'/mod/forum/rsslib.php');
 108
 109         // Delete the RSS files for the 2 forums to force regeneration of the feeds
 110         forum_rss_delete_file($forum);
 111         forum_rss_delete_file($forumto);
 112
 113         redirect($return.'&moved=-1&sesskey='.sesskey());
 114     }
 115
 116     add_to_log($course->id, 'forum', 'view discussion', $PAGE->url->out(false), $discussion->id, $cm->id);
 117
 118     unset($SESSION->fromdiscussion);
 119
 120     if ($mode) {
 121         set_user_preference('forum_displaymode', $mode);
 122     }
 123
 124     $displaymode = get_user_preferences('forum_displaymode', $CFG->forum_displaymode);
 125
 126     if ($parent) {
 127         // If flat AND parent, then force nested display this time
 128         if ($displaymode == FORUM_MODE_FLATOLDEST or $displaymode == FORUM_MODE_FLATNEWEST) {
 129             $displaymode = FORUM_MODE_NESTED;
 130         }
 131     } else {
 132         $parent = $discussion->firstpost;
 133     }
 134
 135     if (! $post = forum_get_post_full($parent)) {
 136         print_error("notexists", 'forum', "$CFG->wwwroot/mod/forum/view.php?f=$forum->id");
 137     }
 138
 139
 140     if (!forum_user_can_view_post($post, $course, $cm, $forum, $discussion)) {
 141         print_error('nopermissiontoview', 'forum', "$CFG->wwwroot/mod/forum/view.php?id=$forum->id");
 142     }
 143
 144     if ($mark == 'read' or $mark == 'unread') {
 145         if ($CFG->forum_usermarksread && forum_tp_can_track_forums($forum) && forum_tp_is_tracked($forum)) {
 146             if ($mark == 'read') {
 147                 forum_tp_add_read_record($USER->id, $postid);
 148             } else {
 149                 // unread
 150                 forum_tp_delete_read_records($USER->id, $postid);
 151             }
 152         }
 153     }
 154
 155     $searchform = forum_search_form($course);
 156
 157     $forumnode = $PAGE->navigation->find($cm->id, navigation_node::TYPE_ACTIVITY);
 158     if (empty($forumnode)) {
 159         $forumnode = $PAGE->navbar;
 160     } else {
 161         $forumnode->make_active();
 162     }
 163     $node = $forumnode->add(format_string($discussion->name), new moodle_url('/mod/forum/discuss.php', array('d'=>$discussion->id)));
 164     $node->display = false;
 165     if ($node && $post->id != $discussion->firstpost) {
 166         $node->add(format_string($post->subject), $PAGE->url);
 167     }
 168
 169     $PAGE->set_title("$course->shortname: ".format_string($discussion->name));
 170     $PAGE->set_heading($course->fullname);
 171     $PAGE->set_button($searchform);
 172     echo $OUTPUT->header();
 173
 174 /// Check to see if groups are being used in this forum
 175 /// If so, make sure the current person is allowed to see this discussion
 176 /// Also, if we know they should be able to reply, then explicitly set $canreply for performance reasons
 177
 178     $canreply = forum_user_can_post($forum, $discussion, $USER, $cm, $course, $modcontext);
 179     if (!$canreply and $forum->type !== 'news') {
 180         if (isguestuser() or !isloggedin()) {
 181             $canreply = true;
 182         }
 183         if (!is_enrolled($modcontext) and !is_viewing($modcontext)) {
 184             // allow guests and not-logged-in to see the link - they are prompted to log in after clicking the link
 185             // normal users with temporary guest access see this link too, they are asked to enrol instead
 186             $canreply = enrol_selfenrol_available($course->id);
 187         }
 188     }
 189
 190 /// Print the controls across the top
 191     echo '<div class="discussioncontrols clearfix">';
 192
 193     if (!empty($CFG->enableportfolios) && has_capability('mod/forum:exportdiscussion', $modcontext)) {
 194         require_once($CFG->libdir.'/portfoliolib.php');
 195         $button = new portfolio_add_button();
 196         $button->set_callback_options('forum_portfolio_caller', array('discussionid' => $discussion->id), '/mod/forum/locallib.php');
 197         $button = $button->to_html(PORTFOLIO_ADD_FULL_FORM, get_string('exportdiscussion', 'mod_forum'));
 198         $buttonextraclass = '';
 199         if (empty($button)) {
 200             // no portfolio plugin available.
 201             $button = '&nbsp;';
 202             $buttonextraclass = ' noavailable';
 203         }
 204         echo html_writer::tag('div', $button, array('class' => 'discussioncontrol exporttoportfolio'.$buttonextraclass));
 205     } else {
 206         echo html_writer::tag('div', '&nbsp;', array('class'=>'discussioncontrol nullcontrol'));
 207     }
 208
 209     // groups selector not needed here
 210     echo '<div class="discussioncontrol displaymode">';
 211     forum_print_mode_form($discussion->id, $displaymode);
 212     echo "</div>";
 213
 214     if ($forum->type != 'single'
 215                 && has_capability('mod/forum:movediscussions', $modcontext)) {
 216
 217         echo '<div class="discussioncontrol movediscussion">';
 218         // Popup menu to move discussions to other forums. The discussion in a
 219         // single discussion forum can't be moved.
 220         $modinfo = get_fast_modinfo($course);
 221         if (isset($modinfo->instances['forum'])) {
 222             $forummenu = array();
 223             $sections = get_all_sections($course->id);
 224             foreach ($modinfo->instances['forum'] as $forumcm) {
 225                 if (!$forumcm->uservisible || !has_capability('mod/forum:startdiscussion',
 226                     get_context_instance(CONTEXT_MODULE,$forumcm->id))) {
 227                     continue;
 228                 }
 229
 230                 $section = $forumcm->sectionnum;
 231                 $sectionname = get_section_name($course, $sections[$section]);
 232                 if (empty($forummenu[$section])) {
 233                     $forummenu[$section] = array($sectionname => array());
 234                 }
 235                 if ($forumcm->instance != $forum->id) {
 236                     $url = "/mod/forum/discuss.php?d=$discussion->id&move=$forumcm->instance&sesskey=".sesskey();
 237                     $forummenu[$section][$sectionname][$url] = format_string($forumcm->name);
 238                 }
 239             }
 240             if (!empty($forummenu)) {
 241                 echo '<div class="movediscussionoption">';
 242                 $select = new url_select($forummenu, '',
 243                         array(''=>get_string("movethisdiscussionto", "forum")),
 244                         'forummenu', get_string('move'));
 245                 echo $OUTPUT->render($select);
 246                 echo "</div>";
 247             }
 248         }
 249         echo "</div>";
 250     }
 251     echo '<div class="clearfloat">&nbsp;</div>';
 252     echo "</div>";
 253
 254     if (!empty($forum->blockafter) && !empty($forum->blockperiod)) {
 255         $a = new stdClass();
 256         $a->blockafter  = $forum->blockafter;
 257         $a->blockperiod = get_string('secondstotime'.$forum->blockperiod);
 258         echo $OUTPUT->notification(get_string('thisforumisthrottled','forum',$a));
 259     }
 260
 261     if ($forum->type == 'qanda' && !has_capability('mod/forum:viewqandawithoutposting', $modcontext) &&
 262                 !forum_user_has_posted($forum->id,$discussion->id,$USER->id)) {
 263         echo $OUTPUT->notification(get_string('qandanotify','forum'));
 264     }
 265
 266     if ($move == -1 and confirm_sesskey()) {
 267         echo $OUTPUT->notification(get_string('discussionmoved', 'forum', format_string($forum->name,true)));
 268     }
 269
 270     $canrate = has_capability('mod/forum:rate', $modcontext);
 271     forum_print_discussion($course, $cm, $forum, $discussion, $post, $displaymode, $canreply, $canrate);
 272
 273     echo $OUTPUT->footer();
 274
 275
 276