mod/forum/subscribers.php

   1 <?php  // $Id$
   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     $crumbs[] = array('name' => $strforums, 'link' => "index.php?id=$course->id", 'type' => 'activity');
  40     $crumbs[] = array('name' => format_string($forum->name), 'link' => "view.php?f=$forum->id", 'type' => 'activityinstance');
  41     $crumbs[] = array('name' => $strsubscribers, 'link' => '', 'type' => 'title');
  42
  43     $navigation = build_navigation($crumbs);
  44
  45     if (has_capability('mod/forum:managesubscriptions', $context)) {
  46         print_header_simple("$strsubscribers", "", $navigation,
  47             "", "", true, forum_update_subscriptions_button($course->id, $id));
  48         if ($edit != -1) {
  49             $USER->subscriptionsediting = $edit;
  50         }
  51     } else {
  52         print_header_simple("$strsubscribers", "", $navigation, "", "", true, '');
  53         unset($USER->subscriptionsediting);
  54     }
  55
  56 /// Check to see if groups are being used in this forum
  57     if ($groupmode = groupmode($course, $cm)) {   // Groups are being used
  58         $currentgroup = setup_and_print_groups($course, $groupmode, "subscribers.php?id=$forum->id");
  59     } else {
  60         $currentgroup = false;
  61     }
  62
  63     if (empty($USER->subscriptionsediting)) {         /// Display an overview of subscribers
  64
  65         if (! $users = forum_subscribed_users($course, $forum, $currentgroup) ) {
  66
  67             print_heading(get_string("nosubscribers", "forum"));
  68
  69         } else {
  70
  71             print_heading(get_string("subscribersto","forum", "'".format_string($forum->name)."'"));
  72
  73             echo '<table align="center" cellpadding="5" cellspacing="5">';
  74             foreach ($users as $user) {
  75                 echo '<tr><td>';
  76                 print_user_picture($user->id, $course->id, $user->picture);
  77                 echo '</td><td>';
  78                 echo fullname($user);
  79                 echo '</td><td>';
  80                 echo $user->email;
  81                 echo '</td></tr>';
  82             }
  83             echo "</table>";
  84         }
  85
  86         print_footer($course);
  87         exit;
  88     }
  89
  90 /// We are in editing mode.
  91
  92     $strexistingsubscribers   = get_string("existingsubscribers", 'forum');
  93     $strpotentialsubscribers  = get_string("potentialsubscribers", 'forum');
  94     $straddsubscriber    = get_string("addsubscriber", 'forum');
  95     $strremovesubscriber = get_string("removesubscriber", 'forum');
  96     $strsearch        = get_string("search");
  97     $strsearchresults  = get_string("searchresults");
  98     $strshowall = get_string("showall");
  99     $strsubscribers = get_string("subscribers", "forum");
 100     $strforums      = get_string("forums", "forum");
 101
 102     if ($frm = data_submitted()) {
 103
 104 /// A form was submitted so process the input
 105
 106         if (!empty($frm->add) and !empty($frm->addselect)) {
 107
 108             foreach ($frm->addselect as $addsubscriber) {
 109                 if (! forum_subscribe($addsubscriber, $id)) {
 110                     error("Could not add subscriber with id $addsubscriber to this forum!");
 111                 }
 112             }
 113         } else if (!empty($frm->remove) and !empty($frm->removeselect)) {
 114             foreach ($frm->removeselect as $removesubscriber) {
 115                 if (! forum_unsubscribe($removesubscriber, $id)) {
 116                     error("Could not remove subscriber with id $removesubscriber from this forum!");
 117                 }
 118             }
 119         } else if (!empty($frm->showall)) {
 120             unset($frm->searchtext);
 121             $frm->previoussearch = 0;
 122         }
 123     }
 124
 125     $previoussearch = (!empty($frm->search) or (!empty($frm->previoussearch) && $frm->previoussearch == 1)) ;
 126
 127 /// Get all existing subscribers for this forum.
 128     if (!$subscribers = forum_subscribed_users($course, $forum, $currentgroup)) {
 129         $subscribers = array();
 130     }
 131
 132     $subscriberarray = array();
 133     foreach ($subscribers as $subscriber) {
 134         $subscriberarray[] = $subscriber->id;
 135     }
 136     $subscriberlist = implode(',', $subscriberarray);
 137
 138     unset($subscriberarray);
 139
 140 /// Get search results excluding any users already subscribed
 141
 142     if (!empty($frm->searchtext) and $previoussearch) {
 143         $searchusers = search_users($course->id, $currentgroup, $frm->searchtext, 'firstname ASC, lastname ASC', $subscriberlist);
 144     }
 145
 146 /// If no search results then get potential subscribers for this forum excluding users already subscribed
 147     if (empty($searchusers)) {
 148         if ($currentgroup) {
 149             $users = get_group_users($currentgroup, 'firstname ASC, lastname ASC', $subscriberlist);
 150         } else {
 151              $users = get_course_users($course->id, 'firstname ASC, lastname ASC', $subscriberlist);
 152         }
 153         if (!$users) {
 154             $users = array();
 155         }
 156
 157     }
 158
 159     $searchtext = (isset($frm->searchtext)) ? $frm->searchtext : "";
 160     $previoussearch = ($previoussearch) ? '1' : '0';
 161
 162     print_simple_box_start('center');
 163
 164     include('subscriber.html');
 165
 166     print_simple_box_end();
 167
 168     print_footer($course);
 169
 170 ?>