mod/forum/subscribers.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * This file is used to display and organise forum subscribers
  20  *
  21  * @package mod-forum
  22  * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
  23  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26 require_once("../../config.php");
  27 require_once("lib.php");
  28
  29 $id    = required_param('id',PARAM_INT);           // forum
  30 $group = optional_param('group',0,PARAM_INT);      // change of group
  31 $edit  = optional_param('edit',-1,PARAM_BOOL);     // Turn editing on and off
  32
  33 $url = new moodle_url('/mod/forum/subscribers.php', array('id'=>$id));
  34 if ($group !== 0) {
  35     $url->param('group', $group);
  36 }
  37 if ($edit !== 0) {
  38     $url->param('edit', $edit);
  39 }
  40 $PAGE->set_url($url);
  41
  42 $forum = $DB->get_record('forum', array('id'=>$id), '*', MUST_EXIST);
  43 $course = $DB->get_record('course', array('id'=>$forum->course), '*', MUST_EXIST);
  44 if (! $cm = get_coursemodule_from_instance('forum', $forum->id, $course->id)) {
  45     $cm->id = 0;
  46 }
  47
  48 require_login($course->id, false, $cm);
  49
  50 $context = get_context_instance(CONTEXT_MODULE, $cm->id);
  51 if (!has_capability('mod/forum:viewsubscribers', $context)) {
  52     print_error('nopermissiontosubscribe', 'forum');
  53 }
  54
  55 unset($SESSION->fromdiscussion);
  56
  57 add_to_log($course->id, "forum", "view subscribers", "subscribers.php?id=$forum->id", $forum->id, $cm->id);
  58
  59 $forumoutput = $PAGE->get_renderer('mod_forum');
  60 $currentgroup = groups_get_activity_group($cm);
  61 $options = array('forumid'=>$forum->id, 'currentgroup'=>$currentgroup, 'context'=>$context);
  62 $existingselector = new forum_existing_subscriber_selector('existingsubscribers', $options);
  63 $subscriberselector = new forum_potential_subscriber_selector('potentialsubscribers', $options);
  64 $subscriberselector->set_existing_subscribers($existingselector->find_users(''));
  65
  66 if (data_submitted()) {
  67     require_sesskey();
  68     $subscribe = (bool)optional_param('subscribe', false, PARAM_RAW);
  69     $unsubscribe = (bool)optional_param('unsubscribe', false, PARAM_RAW);
  70     /** It has to be one or the other, not both or neither */
  71     if (!($subscribe xor $unsubscribe)) {
  72         print_error('invalidaction');
  73     }
  74     if ($subscribe) {
  75         $users = $subscriberselector->get_selected_users();
  76         foreach ($users as $user) {
  77             if (!forum_subscribe($user->id, $id)) {
  78                 print_error('cannotaddsubscriber', 'forum', '', $user->id);
  79             }
  80         }
  81     } else if ($unsubscribe) {
  82         $users = $existingselector->get_selected_users();
  83         foreach ($users as $user) {
  84             if (!forum_unsubscribe($user->id, $id)) {
  85                 print_error('cannotremovesubscriber', 'forum', '', $user->id);
  86             }
  87         }
  88     }
  89     $subscriberselector->invalidate_selected_users();
  90     $existingselector->invalidate_selected_users();
  91     $subscriberselector->set_existing_subscribers($existingselector->find_users(''));
  92 }
  93
  94 $strsubscribers = get_string("subscribers", "forum");
  95 $PAGE->navbar->add($strsubscribers);
  96 $PAGE->set_title($strsubscribers);
  97 $PAGE->set_heading($COURSE->fullname);
  98 if (has_capability('mod/forum:managesubscriptions', $context)) {
  99     $PAGE->set_button(forum_update_subscriptions_button($course->id, $id));
 100     if ($edit != -1) {
 101         $USER->subscriptionsediting = $edit;
 102     }
 103 } else {
 104     unset($USER->subscriptionsediting);
 105 }
 106 echo $OUTPUT->header();
 107 echo $OUTPUT->heading(get_string('forum', 'forum').' '.$strsubscribers);
 108 if (empty($USER->subscriptionsediting)) {
 109     echo $forumoutput->subscriber_overview(forum_subscribed_users($course, $forum, $currentgroup, $context), $forum, $course);
 110 } else if (forum_is_forcesubscribed($forum)) {
 111     $subscriberselector->set_force_subscribed(true);
 112     echo $forumoutput->subscribed_users($subscriberselector);
 113 } else {
 114     echo $forumoutput->subscriber_selection_form($existingselector, $subscriberselector);
 115 }
 116 echo $OUTPUT->footer();