mod/forum/discuss.php

   1 <?php // $Id$
   2
   3 //  Displays a post, and all the posts below it.
   4 //  If no post is given, displays all posts in a discussion
   5
   6     require_once('../../config.php');
   7     require_once('lib.php');
   8
   9     $d      = required_param('d', PARAM_INT);                // Discussion ID
  10     $parent = optional_param('parent', 0, PARAM_INT);        // If set, then display this post and all children.
  11     $mode   = optional_param('mode', 0, PARAM_INT);          // If set, changes the layout of the thread
  12     $move   = optional_param('move', 0, PARAM_INT);          // If set, moves this discussion to another forum
  13     $mark   = optional_param('mark', '', PARAM_ALPHA);       // Used for tracking read posts if user initiated.
  14     $postid = optional_param('postid', 0, PARAM_INT);        // Used for tracking read posts if user initiated.
  15
  16     if (!$discussion = get_record('forum_discussions', 'id', $d)) {
  17         error("Discussion ID was incorrect or no longer exists");
  18     }
  19
  20     if (!$course = get_record('course', 'id', $discussion->course)) {
  21         error("Course ID is incorrect - discussion is faulty");
  22     }
  23
  24     if (!$forum = get_record('forum', 'id', $discussion->forum)) {
  25         notify("Bad forum ID stored in this discussion");
  26     }
  27
  28     if (!$cm = get_coursemodule_from_instance('forum', $forum->id, $course->id)) {
  29         error('Course Module ID was incorrect');
  30     }
  31
  32     require_course_login($course, true, $cm);
  33
  34     $modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
  35     require_capability('mod/forum:viewdiscussion', $modcontext, NULL, true, 'noviewdiscussionspermission', 'forum');
  36
  37     if ($forum->type == 'news') {
  38         if (!($USER->id == $discussion->userid || (($discussion->timestart == 0
  39             || $discussion->timestart <= time())
  40             && ($discussion->timeend == 0 || $discussion->timeend > time())))) {
  41             error('Discussion ID was incorrect or no longer exists', "$CFG->wwwroot/mod/forum/view.php?f=$forum->id");
  42         }
  43     }
  44
  45 /// move discussion if requested
  46     if ($move > 0 and confirm_sesskey()) {
  47         $return = $CFG->wwwroot.'/mod/forum/discuss.php?d='.$discussion->id;
  48
  49         require_capability('mod/forum:movediscussions', $modcontext);
  50
  51         if ($forum->type == 'single') {
  52             error('Cannot move discussion from a simple single discussion forum', $return);
  53         }
  54
  55         if (!$forumto = get_record('forum', 'id', $move)) {
  56             error('You can\'t move to that forum - it doesn\'t exist!', $return);
  57         }
  58
  59         if (!$cmto = get_coursemodule_from_instance('forum', $forumto->id, $course->id)) {
  60             error('Target forum not found in this course.', $return);
  61         }
  62
  63         if (!coursemodule_visible_for_user($cmto)) {
  64             error('Forum not visible', $return);
  65         }
  66
  67         if (!forum_move_attachments($discussion, $forumto->id)) {
  68             notify("Errors occurred while moving attachment directories - check your file permissions");
  69         }
  70         set_field('forum_discussions', 'forum', $forumto->id, 'id', $discussion->id);
  71         set_field('forum_read', 'forumid', $forumto->id, 'discussionid', $discussion->id);
  72         add_to_log($course->id, 'forum', 'move discussion', "discuss.php?d=$discussion->id", $discussion->id, $cmto->id);
  73
  74         require_once($CFG->libdir.'/rsslib.php');
  75         require_once('rsslib.php');
  76
  77         // Delete the RSS files for the 2 forums because we want to force
  78         // the regeneration of the feeds since the discussions have been
  79         // moved.
  80         if (!forum_rss_delete_file($forum) || !forum_rss_delete_file($forumto)) {
  81             error('Could not purge the cached RSS feeds for the source and/or'.
  82                    'destination forum(s) - check your file permissionsforums', $return);
  83         }
  84
  85         redirect($return.'&amp;moved=-1&amp;sesskey='.sesskey());
  86     }
  87
  88     $logparameters = "d=$discussion->id";
  89     if ($parent) {
  90         $logparameters .= "&amp;parent=$parent";
  91     }
  92
  93     add_to_log($course->id, 'forum', 'view discussion', "discuss.php?$logparameters", $discussion->id, $cm->id);
  94
  95     unset($SESSION->fromdiscussion);
  96
  97     if ($mode) {
  98         set_user_preference('forum_displaymode', $mode);
  99     }
 100
 101     $displaymode = get_user_preferences('forum_displaymode', $CFG->forum_displaymode);
 102
 103     if ($parent) {
 104         // If flat AND parent, then force nested display this time
 105         if ($displaymode == FORUM_MODE_FLATOLDEST or $displaymode == FORUM_MODE_FLATNEWEST) {
 106             $displaymode = FORUM_MODE_NESTED;
 107         }
 108     } else {
 109         $parent = $discussion->firstpost;
 110     }
 111
 112     if (! $post = forum_get_post_full($parent)) {
 113         error("Discussion no longer exists", "$CFG->wwwroot/mod/forum/view.php?f=$forum->id");
 114     }
 115
 116
 117     if (!forum_user_can_view_post($post, $course, $cm, $forum, $discussion)) {
 118         error('You do not have permissions to view this post', "$CFG->wwwroot/mod/forum/view.php?id=$forum->id");
 119     }
 120
 121     if ($mark == 'read' or $mark == 'unread') {
 122         if ($CFG->forum_usermarksread && forum_tp_can_track_forums($forum) && forum_tp_is_tracked($forum)) {
 123             if ($mark == 'read') {
 124                 forum_tp_add_read_record($USER->id, $postid);
 125             } else {
 126                 // unread
 127                 forum_tp_delete_read_records($USER->id, $postid);
 128             }
 129         }
 130     }
 131
 132     $searchform = forum_search_form($course);
 133
 134     $navlinks = array();
 135     $navlinks[] = array('name' => format_string($discussion->name), 'link' => "discuss.php?d=$discussion->id", 'type' => 'title');
 136     if ($parent != $discussion->firstpost) {
 137         $navlinks[] = array('name' => format_string($post->subject), 'type' => 'title');
 138     }
 139
 140     $navigation = build_navigation($navlinks, $cm);
 141     print_header("$course->shortname: ".format_string($discussion->name), $course->fullname,
 142                      $navigation, "", "", true, $searchform, navmenu($course, $cm));
 143
 144
 145 /// Check to see if groups are being used in this forum
 146 /// If so, make sure the current person is allowed to see this discussion
 147 /// Also, if we know they should be able to reply, then explicitly set $canreply for performance reasons
 148
 149     if (isguestuser() or !isloggedin() or has_capability('moodle/legacy:guest', $modcontext, NULL, false)) {
 150         // allow guests and not-logged-in to see the link - they are prompted to log in after clicking the link
 151         $canreply = ($forum->type != 'news'); // no reply in news forums
 152
 153     } else {
 154         $canreply = forum_user_can_post($forum, $discussion, $USER, $cm, $course, $modcontext);
 155     }
 156
 157 /// Print the controls across the top
 158
 159     echo '<table width="100%" class="discussioncontrols"><tr><td>';
 160
 161     // groups selector not needed here
 162
 163     echo "</td><td>";
 164     forum_print_mode_form($discussion->id, $displaymode);
 165     echo "</td><td>";
 166
 167     if ($forum->type != 'single'
 168                 && has_capability('mod/forum:movediscussions', $modcontext)) {
 169
 170         // Popup menu to move discussions to other forums. The discussion in a
 171         // single discussion forum can't be moved.
 172         $modinfo = get_fast_modinfo($course);
 173         if (isset($modinfo->instances['forum'])) {
 174             if ($course->format == 'weeks') {
 175                 $strsection = get_string("week");
 176             } else {
 177                 $strsection = get_string("topic");
 178             }
 179             $section = -1;
 180             $forummenu = array();
 181             foreach ($modinfo->instances['forum'] as $forumcm) {
 182                 if (!$forumcm->uservisible) {
 183                     continue;
 184                 }
 185
 186                 if (!empty($forumcm->sectionnum) and $section != $forumcm->sectionnum) {
 187                     $forummenu[] = "-------------- $strsection $forumcm->sectionnum --------------";
 188                 }
 189                 $section = $forumcm->sectionnum;
 190                 if ($forumcm->instance != $forum->id) {
 191                     $url = "discuss.php?d=$discussion->id&amp;move=$forumcm->instance&amp;sesskey=".sesskey();
 192                     $forummenu[$url] = format_string($forumcm->name);
 193                 }
 194             }
 195             if (!empty($forummenu)) {
 196                 echo "<div style=\"float:right;\">";
 197                 echo popup_form("$CFG->wwwroot/mod/forum/", $forummenu, "forummenu", "",
 198                                  get_string("movethisdiscussionto", "forum"), "", "", true);
 199                 echo "</div>";
 200             }
 201         }
 202     }
 203     echo "</td></tr></table>";
 204
 205     if (!empty($forum->blockafter) && !empty($forum->blockperiod)) {
 206         $a = new object();
 207         $a->blockafter  = $forum->blockafter;
 208         $a->blockperiod = get_string('secondstotime'.$forum->blockperiod);
 209         notify(get_string('thisforumisthrottled','forum',$a));
 210     }
 211
 212     if ($forum->type == 'qanda' && !has_capability('mod/forum:viewqandawithoutposting', $modcontext) &&
 213                 !forum_user_has_posted($forum->id,$discussion->id,$USER->id)) {
 214         notify(get_string('qandanotify','forum'));
 215     }
 216
 217     if ($move == -1 and confirm_sesskey()) {
 218         notify(get_string('discussionmoved', 'forum', format_string($forum->name,true)));
 219     }
 220
 221     $canrate = has_capability('mod/forum:rate', $modcontext);
 222     forum_print_discussion($course, $cm, $forum, $discussion, $post, $displaymode, $canreply, $canrate);
 223
 224     print_footer($course);
 225
 226
 227 ?>