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 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(dirname(dirname(__FILE__)) . '/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_FORMAT);
  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 $context = get_context_instance_by_id($contextid);
  69
  70 $PAGE->set_url($url);
  71 $PAGE->set_context($context);
  72
  73 /// Security: make sure we're allowed to do this operation
  74 if ($context->contextlevel == CONTEXT_COURSE) {
  75     $pagename = get_string("repositorycourse",'repository');
  76
  77     if ( !$course = $DB->get_record('course', array('id'=>$context->instanceid))) {
  78         print_error('invalidcourseid');
  79     }
  80     require_login($course, false);
  81     // If the user is allowed to edit this course, he's allowed to edit list of repository instances
  82     require_capability('moodle/course:update',  $context);
  83
  84
  85 } else if ($context->contextlevel == CONTEXT_USER) {
  86     require_login();
  87     $pagename = get_string("personalrepositories",'repository');
  88     //is the user looking at its own repository instances
  89     if ($USER->id != $context->instanceid){
  90         print_error('notyourinstances', 'repository');
  91     }
  92     $user = $USER;
  93     $PAGE->set_pagelayout('mydashboard');
  94 } else {
  95     print_error('invalidcontext');
  96 }
  97
  98 /// Security: we cannot perform any action if the type is not visible or if the context has been disabled
  99 if (!empty($new)){
 100     $type = repository::get_type_by_typename($new);
 101 } else if (!empty($edit)){
 102     $instance = repository::get_instance($edit);
 103     $type = repository::get_type_by_id($instance->options['typeid']);
 104 } else if (!empty($delete)){
 105     $instance = repository::get_instance($delete);
 106     $type = repository::get_type_by_id($instance->options['typeid']);
 107 }
 108
 109 // The context passed MUST match the context of the repository. And as both have to be
 110 // similar, this also ensures that the context is either a user one, or a course one.
 111 if (!empty($instance)) {
 112     if ($instance->instance->contextid != $context->id) {
 113         print_error('invalidcontext');
 114     }
 115 }
 116
 117 if (isset($type)) {
 118     if (!$type->get_visible()) {
 119         print_error('typenotvisible', 'repository', $baseurl);
 120     }
 121     // Prevents the user from creating/editing an instance if the repository is not visible in
 122     // this context OR if the user does not have the capability to view this repository in this context.
 123     $canviewrepository = has_capability('repository/'.$type->get_typename().':view', $context);
 124     if (!$type->get_contextvisibility($context) || !$canviewrepository) {
 125         print_error('usercontextrepositorydisabled', 'repository', $baseurl);
 126     }
 127 }
 128
 129 /// Create navigation links
 130 if (!empty($course)) {
 131     $PAGE->navbar->add($pagename);
 132     $fullname = $course->fullname;
 133 } else {
 134     $fullname = fullname($user);
 135     $strrepos = get_string('repositories', 'repository');
 136     $PAGE->navbar->add($fullname, new moodle_url('/user/view.php', array('id'=>$user->id)));
 137     $PAGE->navbar->add($strrepos);
 138 }
 139
 140 $title = $pagename;
 141
 142 /// Display page header
 143 $PAGE->set_title($title);
 144 $PAGE->set_heading($fullname);
 145 echo $OUTPUT->header();
 146
 147 if ($context->contextlevel == CONTEXT_USER) {
 148     if ( !$course = $DB->get_record('course', array('id'=>$usercourseid))) {
 149         print_error('invalidcourseid');
 150     }
 151 }
 152
 153 $return = true;
 154 if (!empty($edit) || !empty($new)) {
 155     if (!empty($edit)) {
 156         $instance = repository::get_instance($edit);
 157         //if you try to edit an instance set as readonly, display an error message
 158         if ($instance->readonly) {
 159             throw new repository_exception('readonlyinstance', 'repository');
 160         }
 161         // Check if we can read the content of the repository, if not exception is thrown.
 162         $instance->check_capability();
 163         $instancetype = repository::get_type_by_id($instance->options['typeid']);
 164         $classname = 'repository_' . $instancetype->get_typename();
 165         $configs  = $instance->get_instance_option_names();
 166         $plugin = $instancetype->get_typename();
 167         $typeid = $instance->options['typeid'];
 168     } else {
 169         $plugin = $new;
 170         $typeid = $new;
 171         $instance = null;
 172     }
 173
 174 /// Create edit form for this instance
 175     $mform = new repository_instance_form('', array('plugin' => $plugin, 'typeid' => $typeid,'instance' => $instance, 'contextid' => $contextid));
 176
 177 /// Process the form data if any, or display
 178     if ($mform->is_cancelled()){
 179         redirect($baseurl);
 180         exit;
 181
 182     } else if ($fromform = $mform->get_data()){
 183         if (!confirm_sesskey()) {
 184             print_error('confirmsesskeybad', '', $baseurl);
 185         }
 186         if ($edit) {
 187             $settings = array();
 188             $settings['name'] = $fromform->name;
 189             foreach($configs as $config) {
 190                 $settings[$config] = $fromform->$config;
 191             }
 192             $success = $instance->set_option($settings);
 193         } else {
 194             $success = repository::static_function($plugin, 'create', $plugin, 0, get_context_instance_by_id($contextid), $fromform);
 195             $data = data_submitted();
 196         }
 197         if ($success) {
 198             $savedstr = get_string('configsaved', 'repository');
 199             echo $OUTPUT->heading($savedstr);
 200             redirect($baseurl);
 201         } else {
 202             print_error('instancenotsaved', 'repository', $baseurl);
 203         }
 204         exit;
 205     } else {     // Display the form
 206         echo $OUTPUT->heading(get_string('configplugin', 'repository_'.$plugin));
 207         $OUTPUT->box_start();
 208         $mform->display();
 209         $OUTPUT->box_end();
 210         $return = false;
 211     }
 212 } else if (!empty($delete)) {
 213     // echo $OUTPUT->header();
 214     $instance = repository::get_instance($delete);
 215      //if you try to delete an instance set as readonly, display an error message
 216     if ($instance->readonly) {
 217         throw new repository_exception('readonlyinstance', 'repository');
 218     }
 219     // Check if we can read the content of the repository, if not exception is thrown.
 220     $instance->check_capability();
 221     if ($sure) {
 222         if (!confirm_sesskey()) {
 223             print_error('confirmsesskeybad', '', $baseurl);
 224         }
 225         if ($instance->delete()) {
 226             $deletedstr = get_string('instancedeleted', 'repository');
 227             echo $OUTPUT->heading($deletedstr);
 228             redirect($baseurl, $deletedstr, 3);
 229         } else {
 230             print_error('instancenotdeleted', 'repository', $baseurl);
 231         }
 232         exit;
 233     }
 234     $formcontinue = new single_button(new moodle_url($baseurl, array('delete' => $delete, 'sure' => 'yes')), get_string('yes'));
 235     $formcancel = new single_button($baseurl, get_string('no'));
 236     echo $OUTPUT->confirm(get_string('confirmdelete', 'repository', $instance->name), $formcontinue, $formcancel);
 237     $return = false;
 238 } else {
 239     repository::display_instances_list($context);
 240     $return = false;
 241 }
 242
 243 if (!empty($return)) {
 244     redirect($baseurl);
 245 }
 246
 247 echo $OUTPUT->footer();