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   1  <?php  // $Id: subscribers.php,v 1.40.2.2 2008/02/13 17:01:42 skodak Exp $
   2  
   3      require_once("../../config.php");
   4      require_once ("lib.php");
   5  
   6      $id    = required_param('id',PARAM_INT);           // forum
   7      $group = optional_param('group',0,PARAM_INT);      // change of group
   8      $edit  = optional_param('edit',-1,PARAM_BOOL);     // Turn editing on and off
   9  
  10      if (! $forum = get_record("forum", "id", $id)) {
  11          error("Forum ID is incorrect");
  12      }
  13  
  14      if (! $course = get_record("course", "id", $forum->course)) {
  15          error("Could not find this course!");
  16      }
  17  
  18      if (! $cm = get_coursemodule_from_instance("forum", $forum->id, $course->id)) {
  19          $cm->id = 0;
  20      }
  21  
  22      require_login($course->id, false, $cm);
  23  
  24      $context = get_context_instance(CONTEXT_MODULE, $cm->id);
  25  
  26      if (!has_capability('mod/forum:viewsubscribers', $context)) {
  27          error('You do not have the permission to view forum subscribers');
  28      }
  29  
  30      unset($SESSION->fromdiscussion);
  31  
  32      add_to_log($course->id, "forum", "view subscribers", "subscribers.php?id=$forum->id", $forum->id, $cm->id);
  33  
  34      $strsubscribeall = get_string("subscribeall", "forum");
  35      $strsubscribenone = get_string("subscribenone", "forum");
  36      $strsubscribers = get_string("subscribers", "forum");
  37      $strforums      = get_string("forums", "forum");
  38  
  39      $navigation = build_navigation($strsubscribers, $cm);
  40  
  41      if (has_capability('mod/forum:managesubscriptions', $context)) {
  42          print_header_simple("$strsubscribers", "", $navigation,
  43              "", "", true, forum_update_subscriptions_button($course->id, $id));
  44          if ($edit != -1) {
  45              $USER->subscriptionsediting = $edit;
  46          }
  47      } else {
  48          print_header_simple("$strsubscribers", "", $navigation, "", "", true, '');
  49          unset($USER->subscriptionsediting);
  50      }
  51  
  52  /// Check to see if groups are being used in this forum
  53      groups_print_activity_menu($cm, "subscribers.php?id=$forum->id");
  54      $currentgroup = groups_get_activity_group($cm);
  55      $groupmode = groups_get_activity_groupmode($cm);
  56  
  57      if (empty($USER->subscriptionsediting)) {         /// Display an overview of subscribers
  58  
  59          if (! $users = forum_subscribed_users($course, $forum, $currentgroup) ) {
  60  
  61              print_heading(get_string("nosubscribers", "forum"));
  62  
  63          } else {
  64  
  65              print_heading(get_string("subscribersto","forum", "'".format_string($forum->name)."'"));
  66  
  67              echo '<table align="center" cellpadding="5" cellspacing="5">';
  68              foreach ($users as $user) {
  69                  echo '<tr><td>';
  70                  print_user_picture($user, $course->id);
  71                  echo '</td><td>';
  72                  echo fullname($user);
  73                  echo '</td><td>';
  74                  echo $user->email;
  75                  echo '</td></tr>';
  76              }
  77              echo "</table>";
  78          }
  79  
  80          print_footer($course);
  81          exit;
  82      }
  83  
  84  /// We are in editing mode.
  85  
  86      $strexistingsubscribers   = get_string("existingsubscribers", 'forum');
  87      $strpotentialsubscribers  = get_string("potentialsubscribers", 'forum');
  88      $straddsubscriber    = get_string("addsubscriber", 'forum');
  89      $strremovesubscriber = get_string("removesubscriber", 'forum');
  90      $strsearch        = get_string("search");
  91      $strsearchresults  = get_string("searchresults");
  92      $strshowall = get_string("showall");
  93      $strsubscribers = get_string("subscribers", "forum");
  94      $strforums      = get_string("forums", "forum");
  95  
  96      if ($frm = data_submitted()) {
  97  
  98  /// A form was submitted so process the input
  99  
 100          if (!empty($frm->add) and !empty($frm->addselect)) {
 101  
 102              foreach ($frm->addselect as $addsubscriber) {
 103                  if (! forum_subscribe($addsubscriber, $id)) {
 104                      error("Could not add subscriber with id $addsubscriber to this forum!");
 105                  }
 106              }
 107          } else if (!empty($frm->remove) and !empty($frm->removeselect)) {
 108              foreach ($frm->removeselect as $removesubscriber) {
 109                  if (! forum_unsubscribe($removesubscriber, $id)) {
 110                      error("Could not remove subscriber with id $removesubscriber from this forum!");
 111                  }
 112              }
 113          } else if (!empty($frm->showall)) {
 114              unset($frm->searchtext);
 115              $frm->previoussearch = 0;
 116          }
 117      }
 118  
 119      $previoussearch = (!empty($frm->search) or (!empty($frm->previoussearch) && $frm->previoussearch == 1)) ;
 120  
 121  /// Get all existing subscribers for this forum.
 122      if (!$subscribers = forum_subscribed_users($course, $forum, $currentgroup)) {
 123          $subscribers = array();
 124      }
 125  
 126      $subscriberarray = array();
 127      foreach ($subscribers as $subscriber) {
 128          $subscriberarray[] = $subscriber->id;
 129      }
 130      $subscriberlist = implode(',', $subscriberarray);
 131  
 132      unset($subscriberarray);
 133  
 134  /// Get search results excluding any users already subscribed
 135  
 136      if (!empty($frm->searchtext) and $previoussearch) {
 137          $searchusers = search_users($course->id, $currentgroup, $frm->searchtext, 'firstname ASC, lastname ASC', $subscriberlist);
 138      }
 139  
 140  /// If no search results then get potential subscribers for this forum excluding users already subscribed
 141      if (empty($searchusers)) {
 142          if ($currentgroup) {
 143              $users = get_group_users($currentgroup, 'firstname ASC, lastname ASC', $subscriberlist);
 144          } else {
 145               $users = get_course_users($course->id, 'firstname ASC, lastname ASC', $subscriberlist);
 146          }
 147          if (!$users) {
 148              $users = array();
 149          }
 150  
 151      }
 152  
 153      $searchtext = (isset($frm->searchtext)) ? $frm->searchtext : "";
 154      $previoussearch = ($previoussearch) ? '1' : '0';
 155  
 156      print_simple_box_start('center');
 157  
 158      include ('subscriber.html');
 159  
 160      print_simple_box_end();
 161  
 162      print_footer($course);
 163  
 164  ?>