repository/manage_instances.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 /**
  20  * This file is used to manage repositories
  21  *
  22  * @since Moodle 2.0
  23  * @package    core
  24  * @subpackage repository
  25  * @copyright  2009 Dongsheng Cai <dongsheng@moodle.com>
  26  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  27  */
  28
  29 require_once(__DIR__ . '/../config.php');
  30 require_once($CFG->dirroot . '/repository/lib.php');
  31
  32 $edit    = optional_param('edit', 0, PARAM_INT);
  33 $new     = optional_param('new', '', PARAM_ALPHANUMEXT);
  34 $delete  = optional_param('delete', 0, PARAM_INT);
  35 $sure    = optional_param('sure', '', PARAM_ALPHA);
  36 $contextid = optional_param('contextid', 0, PARAM_INT);
  37 $usercourseid = optional_param('usercourseid', SITEID, PARAM_INT);  // Extra: used for user context only
  38
  39 $url = new moodle_url('/repository/manage_instances.php');
  40
  41 $baseurl = new moodle_url('/repository/manage_instances.php');
  42 $baseurl->param('sesskey', sesskey());
  43
  44 if ($edit){
  45     $url->param('edit', $edit);
  46     $pagename = 'repositoryinstanceedit';
  47 } else if ($delete) {
  48     $url->param('delete', $delete);
  49     $pagename = 'repositorydelete';
  50 } else if ($new) {
  51     $url->param('new', $new);
  52     $pagename = 'repositoryinstancenew';
  53 } else {
  54     $pagename = 'repositorylist';
  55 }
  56
  57 if ($sure !== '') {
  58     $url->param('sure', $sure);
  59 }
  60 if ($contextid !== 0) {
  61     $url->param('contextid', $contextid);
  62     $baseurl->param('contextid', $contextid);
  63 }
  64 if ($usercourseid != SITEID) {
  65     $url->param('usercourseid', $usercourseid);
  66 }
  67
  68 $context = context::instance_by_id($contextid);
  69
  70 $PAGE->set_url($url);
  71 $PAGE->set_context($context);
  72 $PAGE->set_pagelayout('standard');
  73
  74 /// Security: make sure we're allowed to do this operation
  75 if ($context->contextlevel == CONTEXT_COURSE) {
  76     $pagename = get_string("repositorycourse",'repository');
  77
  78     if ( !$course = $DB->get_record('course', array('id'=>$context->instanceid))) {
  79         print_error('invalidcourseid');
  80     }
  81     require_login($course, false);
  82     // If the user is allowed to edit this course, he's allowed to edit list of repository instances
  83     require_capability('moodle/course:update',  $context);
  84
  85
  86 } else if ($context->contextlevel == CONTEXT_USER) {
  87     require_login();
  88     $pagename = get_string('manageinstances', 'repository');
  89     //is the user looking at its own repository instances
  90     if ($USER->id != $context->instanceid){
  91         print_error('notyourinstances', 'repository');
  92     }
  93     $user = $USER;
  94 } else {
  95     print_error('invalidcontext');
  96 }
  97
  98 /// Security: we cannot perform any action if the type is not visible or if the context has been disabled
  99 if (!empty($new) && empty($edit)){
 100     $type = repository::get_type_by_typename($new);
 101 } else if (!empty($edit)){
 102     $instance = repository::get_repository_by_id($edit, $context->id);
 103     $type = repository::get_type_by_id($instance->options['typeid']);
 104 } else if (!empty($delete)){
 105     $instance = repository::get_repository_by_id($delete, $context->id);
 106     $type = repository::get_type_by_id($instance->options['typeid']);
 107 }
 108
 109 if (isset($type)) {
 110     if (!$type->get_visible()) {
 111         print_error('typenotvisible', 'repository', $baseurl);
 112     }
 113     // Prevents the user from creating/editing an instance if the repository is not visible in
 114     // this context OR if the user does not have the capability to view this repository in this context.
 115     $canviewrepository = has_capability('repository/'.$type->get_typename().':view', $context);
 116     if (!$type->get_contextvisibility($context) || !$canviewrepository) {
 117         print_error('usercontextrepositorydisabled', 'repository', $baseurl);
 118     }
 119 }
 120
 121 // We have an instance when we are going to edit, or delete. Several checks need to be done!
 122 if (!empty($instance)) {
 123     // The context passed MUST match the context of the repository. And as both have to be
 124     // similar, this also ensures that the context is either a user one, or a course one.
 125     if ($instance->instance->contextid != $context->id) {
 126         print_error('invalidcontext');
 127     }
 128     if ($instance->readonly) {
 129         // Cannot edit, or delete a readonly instance.
 130         throw new repository_exception('readonlyinstance', 'repository');
 131     } else if (!$instance->can_be_edited_by_user()) {
 132         // The user has to have the right to edit the instance.
 133         throw new repository_exception('nopermissiontoaccess', 'repository');
 134     }
 135 }
 136
 137 // Create navigation links.
 138 if (!empty($course)) {
 139     $pageheading = $course->fullname;
 140 } else {
 141     $pageheading = $pagename;
 142 }
 143
 144 // Display page header.
 145 $PAGE->set_title($pagename);
 146 $PAGE->set_heading($pageheading);
 147
 148 $return = true;
 149 if (!empty($edit) || !empty($new)) {
 150     if (!empty($edit)) {
 151         $instancetype = repository::get_type_by_id($instance->options['typeid']);
 152         $classname = 'repository_' . $instancetype->get_typename();
 153         $configs  = $instance->get_instance_option_names();
 154         $plugin = $instancetype->get_typename();
 155         $typeid = $instance->options['typeid'];
 156     } else {
 157         $plugin = $new;
 158         $typeid = $new;
 159         $instance = null;
 160     }
 161
 162 /// Create edit form for this instance
 163     $mform = new repository_instance_form('', array('plugin' => $plugin, 'typeid' => $typeid,'instance' => $instance, 'contextid' => $contextid));
 164
 165 /// Process the form data if any, or display
 166     if ($mform->is_cancelled()){
 167         redirect($baseurl);
 168         exit;
 169
 170     } else if ($fromform = $mform->get_data()){
 171         if (!confirm_sesskey()) {
 172             print_error('confirmsesskeybad', '', $baseurl);
 173         }
 174         if ($edit) {
 175             $settings = array();
 176             $settings['name'] = $fromform->name;
 177             foreach($configs as $config) {
 178                 $settings[$config] = isset($fromform->$config) ? $fromform->$config : null;
 179             }
 180             $success = $instance->set_option($settings);
 181         } else {
 182             $success = repository::static_function($plugin, 'create', $plugin, 0, context::instance_by_id($contextid), $fromform);
 183             $data = data_submitted();
 184         }
 185         if ($success) {
 186             $savedstr = get_string('configsaved', 'repository');
 187             redirect($baseurl);
 188         } else {
 189             print_error('instancenotsaved', 'repository', $baseurl);
 190         }
 191         exit;
 192     } else {     // Display the form
 193         echo $OUTPUT->header();
 194         echo $OUTPUT->heading(get_string('configplugin', 'repository_'.$plugin));
 195         $OUTPUT->box_start();
 196         $mform->display();
 197         $OUTPUT->box_end();
 198         $return = false;
 199     }
 200 } else if (!empty($delete)) {
 201     if ($sure) {
 202         if (!confirm_sesskey()) {
 203             print_error('confirmsesskeybad', '', $baseurl);
 204         }
 205         if ($instance->delete()) {
 206             $deletedstr = get_string('instancedeleted', 'repository');
 207             redirect($baseurl, $deletedstr, 3);
 208         } else {
 209             print_error('instancenotdeleted', 'repository', $baseurl);
 210         }
 211         exit;
 212     }
 213     echo $OUTPUT->header();
 214     $formcontinue = new single_button(new moodle_url($baseurl, array('delete' => $delete, 'sure' => 'yes')), get_string('yes'));
 215     $formcancel = new single_button($baseurl, get_string('no'));
 216     echo $OUTPUT->confirm(get_string('confirmdelete', 'repository', $instance->name), $formcontinue, $formcancel);
 217     $return = false;
 218 } else {
 219     echo $OUTPUT->header();
 220     repository::display_instances_list($context);
 221     $return = false;
 222 }
 223
 224 if (!empty($return)) {
 225     redirect($baseurl);
 226 }
 227
 228 echo $OUTPUT->footer();