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   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  ?>