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