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
   8     $d      = required_param('d', PARAM_INT);                // Discussion ID
   9     $parent = optional_param('parent', 0, PARAM_INT);        // If set, then display this post and all children.
  10     $mode   = optional_param('mode', 0, PARAM_INT);          // If set, changes the layout of the thread
  11     $move   = optional_param('move', 0, PARAM_INT);          // If set, moves this discussion to another forum
  12     $fromforum = optional_param('fromforum', 0, PARAM_INT);  // Needs to be set when we want to move a discussion.
  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, $course->id)) {
  29         error('Course Module ID was incorrect');
  30     }
  31     // move this down fix for MDL-6926
  32     require_once("lib.php");
  33     require_course_login($course, true, $cm);
  34
  35     $modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
  36     $canviewdiscussion = has_capability('mod/forum:viewdiscussion', $modcontext);
  37
  38     if ($forum->type == "news") {
  39         if (!($USER->id == $discussion->userid || (($discussion->timestart == 0
  40             || $discussion->timestart <= time())
  41             && ($discussion->timeend == 0 || $discussion->timeend > time())))) {
  42             error('Discussion ID was incorrect or no longer exists', "$CFG->wwwroot/mod/forum/view.php?f=$forum->id");
  43         }
  44     }
  45
  46
  47     if (!empty($move)) {
  48
  49         if (!$sourceforum = get_record('forum', 'id', $fromforum)) {
  50             error('Cannot find which forum this discussion is being moved from');
  51         }
  52         if ($sourceforum->type == 'single') {
  53             error('Cannot move discussion from a simple single discussion forum');
  54         }
  55
  56         require_capability('mod/forum:movediscussions', $modcontext);
  57
  58         if ($forum = get_record("forum", "id", $move)) {
  59             if (!forum_move_attachments($discussion, $move)) {
  60                 notify("Errors occurred while moving attachment directories - check your file permissions");
  61             }
  62             set_field("forum_discussions", "forum", $forum->id, "id", $discussion->id);
  63             $discussion->forum = $forum->id;
  64             if ($cm = get_coursemodule_from_instance("forum", $forum->id, $course->id)) {
  65                 add_to_log($course->id, "forum", "move discussion", "discuss.php?d=$discussion->id", "$discussion->id",
  66                            $cm->id);
  67             } else {
  68                 add_to_log($course->id, "forum", "move discussion", "discuss.php?d=$discussion->id", "$discussion->id");
  69             }
  70             $discussionmoved = true;
  71
  72             require_once('rsslib.php');
  73             require_once($CFG->libdir.'/rsslib.php');
  74
  75             // Delete the RSS files for the 2 forums because we want to force
  76             // the regeneration of the feeds since the discussions have been
  77             // moved.
  78             if (!forum_rss_delete_file($forum) || !forum_rss_delete_file($sourceforum)) {
  79                 notify('Could not purge the cached RSS feeds for the source and/or'.
  80                        'destination forum(s) - check your file permissionsforums');
  81             }
  82         } else {
  83             error('You can\'t move to that forum - it doesn\'t exist!');
  84         }
  85     }
  86
  87     $logparameters = "d=$discussion->id";
  88     if ($parent) {
  89         $logparameters .= "&amp;parent=$parent";
  90     }
  91
  92     if ($cm = get_coursemodule_from_instance("forum", $forum->id, $course->id)) {
  93         add_to_log($course->id, "forum", "view discussion", "discuss.php?$logparameters", "$discussion->id", $cm->id);
  94     } else {
  95         add_to_log($course->id, "forum", "view discussion", "discuss.php?$logparameters", "$discussion->id");
  96     }
  97
  98     unset($SESSION->fromdiscussion);
  99
 100     $crumbs[] = array('name' => get_string("forums", "forum"), 'link' => "../forum/index.php?id=$course->id", 'type' => 'activity');
 101     $crumbs[] = array('name' => format_string($forum->name,true), 'link' => "../forum/view.php?f=$forum->id", 'type' => 'activityinstance');
 102     $crumbs[] = array('name' => format_string($discussion->name,true), 'link' => "discuss.php?d=$discussion->id", 'type' => 'title');
 103
 104
 105     if ($mode) {
 106         set_user_preference('forum_displaymode', $mode);
 107     }
 108
 109     $displaymode = get_user_preferences('forum_displaymode', $CFG->forum_displaymode);
 110
 111     if ($parent) {
 112         if (abs($displaymode) == 1) {  // If flat AND parent, then force nested display this time
 113             $displaymode = 3;
 114         }
 115     } else {
 116         $parent = $discussion->firstpost;
 117     }
 118
 119     if (!forum_user_can_view_post($parent, $course, $cm, $forum, $discussion)) {
 120         error('You do not have permissions to view this post', "$CFG->wwwroot/mod/forum/view.php?f=$forum->id");
 121     }
 122
 123     if (! $post = forum_get_post_full($parent)) {
 124         error("Discussion no longer exists", "$CFG->wwwroot/mod/forum/view.php?f=$forum->id");
 125     }
 126
 127     if (forum_tp_can_track_forums($forum) && forum_tp_is_tracked($forum) &&
 128         $CFG->forum_usermarksread) {
 129         if ($mark == 'read') {
 130             forum_tp_add_read_record($USER->id, $postid, $discussion->id, $forum->id);
 131         } else if ($mark == 'unread') {
 132             forum_tp_delete_read_records($USER->id, $postid);
 133         }
 134     }
 135
 136
 137     $searchform = forum_search_form($course);
 138
 139     $navigation = build_navigation($crumbs);
 140     print_header("$course->shortname: ".format_string($discussion->name), $course->fullname,
 141                      $navigation, "", "", true, $searchform, navmenu($course, $cm));
 142
 143
 144 /// Check to see if groups are being used in this forum
 145 /// If so, make sure the current person is allowed to see this discussion
 146 /// Also, if we know they should be able to reply, then explicitly set $canreply
 147
 148     if ($forum->type == 'news') {
 149         $capname = 'mod/forum:replynews';
 150     } else {
 151         $capname = 'mod/forum:replypost';
 152     }
 153
 154     $groupmode = groupmode($course, $cm);
 155     if ($canreply = has_capability($capname, $modcontext)) {
 156
 157         if ($groupmode && !has_capability('moodle/site:accessallgroups', $modcontext)) {
 158             // Groups must be kept separate
 159             //change this to ismember
 160             $mygroupid = mygroupid($course->id); //only useful if 0, otherwise it's an array now
 161             if ($groupmode == SEPARATEGROUPS) {
 162                 require_login();
 163
 164                 if ((empty($mygroupid) and $discussion->groupid == -1) || (ismember($discussion->groupid) || $mygroupid == $discussion->groupid)) {
 165                     // $canreply = true;
 166                 } elseif ($discussion->groupid == -1) {
 167                     $canreply = false;
 168                 } else {
 169                     print_heading("Sorry, you can't see this discussion because you are not in this group");
 170                     print_footer($course);
 171                     die;
 172                 }
 173
 174             } else if ($groupmode == VISIBLEGROUPS) {
 175                 $canreply = ( (empty($mygroupid) && $discussion->groupid == -1) ||
 176                     (ismember($discussion->groupid) || $mygroupid == $discussion->groupid) );
 177             }
 178         }
 179     } else { // allow guests to see the link
 180         $coursecontext = get_context_instance(CONTEXT_COURSE, $course->id);
 181         if (has_capability('moodle/legacy:guest', $coursecontext, NULL, false)) {  // User is a guest here!
 182             $canreply = true;
 183         }
 184     }
 185
 186 /// Print the controls across the top
 187
 188     echo '<table width="100%" class="discussioncontrols"><tr><td>';
 189
 190     // groups selector not needed here
 191
 192     echo "</td><td>";
 193     forum_print_mode_form($discussion->id, $displaymode);
 194     echo "</td><td>";
 195
 196     if ($forum->type != 'single'
 197                 && has_capability('mod/forum:movediscussions', $modcontext)) {
 198
 199         // Popup menu to move discussions to other forums. The discussion in a
 200         // single discussion forum can't be moved.
 201         if ($forums = get_all_instances_in_course("forum", $course)) {
 202             if ($course->format == 'weeks') {
 203                 $strsection = get_string("week");
 204             } else {
 205                 $strsection = get_string("topic");
 206             }
 207             $section = -1;
 208             foreach ($forums as $courseforum) {
 209                 if (!empty($courseforum->section) and $section != $courseforum->section) {
 210                     $forummenu[] = "-------------- $strsection $courseforum->section --------------";
 211                 }
 212                 $section = $courseforum->section;
 213                 if ($courseforum->id != $forum->id) {
 214                     $url = "discuss.php?d=$discussion->id&amp;fromforum=$discussion->forum&amp;move=$courseforum->id";
 215                     $forummenu[$url] = format_string($courseforum->name,true);
 216                 }
 217             }
 218             if (!empty($forummenu)) {
 219                 echo "<div style=\"float:right;\">";
 220                 echo popup_form("$CFG->wwwroot/mod/forum/", $forummenu, "forummenu", "",
 221                                  get_string("movethisdiscussionto", "forum"), "", "", true);
 222                 echo "</div>";
 223             }
 224         }
 225     }
 226     echo "</td></tr></table>";
 227
 228     if (!empty($forum->blockafter) && !empty($forum->blockperiod)) {
 229         $a->blockafter = $forum->blockafter;
 230         $a->blockperiod = get_string('secondstotime'.$forum->blockperiod);
 231         notify(get_string('thisforumisthrottled','forum',$a));
 232     }
 233
 234     if ($forum->type == 'qanda' && !has_capability('mod/forum:viewqandawithoutposting', $modcontext) &&
 235                 !forum_user_has_posted($forum->id,$discussion->id,$USER->id)) {
 236         notify(get_string('qandanotify','forum'));
 237     }
 238
 239     if (isset($discussionmoved)) {
 240         notify(get_string("discussionmoved", "forum", format_string($forum->name,true)));
 241     }
 242
 243
 244 /// Print the actual discussion
 245     if (!$canviewdiscussion) {
 246         notice(get_string('noviewdiscussionspermission', 'forum'));
 247     } else {
 248         $canrate = has_capability('mod/forum:rate', $modcontext);
 249         forum_print_discussion($course, $forum, $discussion, $post, $displaymode, $canreply, $canrate);
 250     }
 251
 252     print_footer($course);
 253
 254
 255 ?>