enrol/instances.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * Main course enrolment management UI.
  19  *
  20  * @package    core_enrol
  21  * @copyright  2010 Petr Skoda {@link http://skodak.org}
  22  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  */
  24
  25 require('../config.php');
  26
  27 $id         = required_param('id', PARAM_INT); // course id
  28 $action     = optional_param('action', '', PARAM_ALPHANUMEXT);
  29 $instanceid = optional_param('instance', 0, PARAM_INT);
  30 $confirm    = optional_param('confirm', 0, PARAM_BOOL);
  31 $confirm2   = optional_param('confirm2', 0, PARAM_BOOL);
  32
  33 $course = $DB->get_record('course', array('id'=>$id), '*', MUST_EXIST);
  34 $context = context_course::instance($course->id, MUST_EXIST);
  35
  36 if ($course->id == SITEID) {
  37     redirect("$CFG->wwwroot/");
  38 }
  39
  40 require_login($course);
  41 require_capability('moodle/course:enrolreview', $context);
  42
  43 $canconfig = has_capability('moodle/course:enrolconfig', $context);
  44
  45 $PAGE->set_url('/enrol/instances.php', array('id'=>$course->id));
  46 $PAGE->set_pagelayout('admin');
  47 $PAGE->set_title(get_string('enrolmentinstances', 'enrol'));
  48 $PAGE->set_heading($course->fullname);
  49
  50 $instances = enrol_get_instances($course->id, false);
  51 $plugins   = enrol_get_plugins(false);
  52
  53 if ($canconfig and $action and confirm_sesskey()) {
  54     if (isset($instances[$instanceid]) and isset($plugins[$instances[$instanceid]->enrol])) {
  55         if ($action === 'up') {
  56             $order = array_keys($instances);
  57             $order = array_flip($order);
  58             $pos = $order[$instanceid];
  59             if ($pos > 0) {
  60                 $switch = $pos - 1;
  61                 $resorted = array_values($instances);
  62                 $temp = $resorted[$pos];
  63                 $resorted[$pos] = $resorted[$switch];
  64                 $resorted[$switch] = $temp;
  65                 // now update db sortorder
  66                 foreach ($resorted as $sortorder=>$instance) {
  67                     if ($instance->sortorder != $sortorder) {
  68                         $instance->sortorder = $sortorder;
  69                         $DB->update_record('enrol', $instance);
  70                     }
  71                 }
  72             }
  73             redirect($PAGE->url);
  74
  75         } else if ($action === 'down') {
  76             $order = array_keys($instances);
  77             $order = array_flip($order);
  78             $pos = $order[$instanceid];
  79             if ($pos < count($instances) - 1) {
  80                 $switch = $pos + 1;
  81                 $resorted = array_values($instances);
  82                 $temp = $resorted[$pos];
  83                 $resorted[$pos] = $resorted[$switch];
  84                 $resorted[$switch] = $temp;
  85                 // now update db sortorder
  86                 foreach ($resorted as $sortorder=>$instance) {
  87                     if ($instance->sortorder != $sortorder) {
  88                         $instance->sortorder = $sortorder;
  89                         $DB->update_record('enrol', $instance);
  90                     }
  91                 }
  92             }
  93             redirect($PAGE->url);
  94
  95         } else if ($action === 'delete') {
  96             $instance = $instances[$instanceid];
  97             $plugin = $plugins[$instance->enrol];
  98
  99             if ($plugin->can_delete_instance($instance)) {
 100                 if ($confirm) {
 101                     if (enrol_accessing_via_instance($instance)) {
 102                         if (!$confirm2) {
 103                             $yesurl = new moodle_url('/enrol/instances.php',
 104                                                      array('id' => $course->id,
 105                                                            'action' => 'delete',
 106                                                            'instance' => $instance->id,
 107                                                            'confirm' => 1,
 108                                                            'confirm2' => 1,
 109                                                            'sesskey' => sesskey()));
 110                             $displayname = $plugin->get_instance_name($instance);
 111                             $message = markdown_to_html(get_string('deleteinstanceconfirmself',
 112                                                                    'enrol',
 113                                                                    array('name' => $displayname)));
 114                             echo $OUTPUT->header();
 115                             echo $OUTPUT->confirm($message, $yesurl, $PAGE->url);
 116                             echo $OUTPUT->footer();
 117                             die();
 118                         }
 119                     }
 120                     $plugin->delete_instance($instance);
 121                     redirect($PAGE->url);
 122                 }
 123
 124                 echo $OUTPUT->header();
 125                 $yesurl = new moodle_url('/enrol/instances.php',
 126                                          array('id' => $course->id,
 127                                                'action' => 'delete',
 128                                                'instance' => $instance->id,
 129                                                'confirm' => 1,
 130                                                'sesskey' => sesskey()));
 131                 $displayname = $plugin->get_instance_name($instance);
 132                 $users = $DB->count_records('user_enrolments', array('enrolid' => $instance->id));
 133                 if ($users) {
 134                     $message = markdown_to_html(get_string('deleteinstanceconfirm', 'enrol',
 135                                                            array('name' => $displayname,
 136                                                                  'users' => $users)));
 137                 } else {
 138                     $message = markdown_to_html(get_string('deleteinstancenousersconfirm', 'enrol',
 139                                                            array('name' => $displayname)));
 140                 }
 141                 echo $OUTPUT->confirm($message, $yesurl, $PAGE->url);
 142                 echo $OUTPUT->footer();
 143                 die();
 144             }
 145
 146         } else if ($action === 'disable') {
 147             $instance = $instances[$instanceid];
 148             $plugin = $plugins[$instance->enrol];
 149             if ($plugin->can_hide_show_instance($instance)) {
 150                 if ($instance->status != ENROL_INSTANCE_DISABLED) {
 151                     if (enrol_accessing_via_instance($instance)) {
 152                         if (!$confirm2) {
 153                             $yesurl = new moodle_url('/enrol/instances.php',
 154                                                      array('id' => $course->id,
 155                                                            'action' => 'disable',
 156                                                            'instance' => $instance->id,
 157                                                            'confirm2' => 1,
 158                                                            'sesskey' => sesskey()));
 159                             $displayname = $plugin->get_instance_name($instance);
 160                             $message = markdown_to_html(get_string('disableinstanceconfirmself',
 161                                                         'enrol',
 162                                                         array('name' => $displayname)));
 163                             echo $OUTPUT->header();
 164                             echo $OUTPUT->confirm($message, $yesurl, $PAGE->url);
 165                             echo $OUTPUT->footer();
 166                             die();
 167                         }
 168                     }
 169                     $plugin->update_status($instance, ENROL_INSTANCE_DISABLED);
 170                     redirect($PAGE->url);
 171                 }
 172             }
 173
 174         } else if ($action === 'enable') {
 175             $instance = $instances[$instanceid];
 176             $plugin = $plugins[$instance->enrol];
 177             if ($plugin->can_hide_show_instance($instance)) {
 178                 if ($instance->status != ENROL_INSTANCE_ENABLED) {
 179                     $plugin->update_status($instance, ENROL_INSTANCE_ENABLED);
 180                     redirect($PAGE->url);
 181                 }
 182             }
 183         }
 184     }
 185 }
 186
 187
 188 echo $OUTPUT->header();
 189 echo $OUTPUT->heading(get_string('enrolmentinstances', 'enrol'));
 190
 191 echo $OUTPUT->box_start('generalbox boxaligncenter boxwidthnormal');
 192
 193 // display strings
 194 $strup      = get_string('up');
 195 $strdown    = get_string('down');
 196 $strdelete  = get_string('delete');
 197 $strenable  = get_string('enable');
 198 $strdisable = get_string('disable');
 199 $strmanage  = get_string('manageinstance', 'enrol');
 200
 201 $table = new html_table();
 202 $table->head  = array(get_string('name'), get_string('users'), $strup.'/'.$strdown, get_string('edit'));
 203 $table->align = array('left', 'center', 'center', 'center');
 204 $table->width = '100%';
 205 $table->data  = array();
 206
 207 // iterate through enrol plugins and add to the display table
 208 $updowncount = 1;
 209 $icount = count($instances);
 210 $url = new moodle_url('/enrol/instances.php', array('sesskey'=>sesskey(), 'id'=>$course->id));
 211 foreach ($instances as $instance) {
 212     if (!isset($plugins[$instance->enrol])) {
 213         continue;
 214     }
 215     $plugin = $plugins[$instance->enrol];
 216
 217     $displayname = $plugin->get_instance_name($instance);
 218     if (!enrol_is_enabled($instance->enrol) or $instance->status != ENROL_INSTANCE_ENABLED) {
 219         $displayname = html_writer::tag('span', $displayname, array('class'=>'dimmed_text'));
 220     }
 221
 222     $users = $DB->count_records('user_enrolments', array('enrolid'=>$instance->id));
 223
 224     $updown = array();
 225     $edit = array();
 226
 227     if ($canconfig) {
 228         // up/down link
 229         $updown = '';
 230         if ($updowncount > 1) {
 231             $aurl = new moodle_url($url, array('action'=>'up', 'instance'=>$instance->id));
 232             $updown[] = $OUTPUT->action_icon($aurl, new pix_icon('t/up', $strup, 'core', array('class' => 'iconsmall')));
 233         } else {
 234             $updown[] = html_writer::empty_tag('img', array('src'=>$OUTPUT->pix_url('spacer'), 'alt'=>'', 'class'=>'iconsmall'));
 235         }
 236         if ($updowncount < $icount) {
 237             $aurl = new moodle_url($url, array('action'=>'down', 'instance'=>$instance->id));
 238             $updown[] = $OUTPUT->action_icon($aurl, new pix_icon('t/down', $strdown, 'core', array('class' => 'iconsmall')));
 239         } else {
 240             $updown[] = html_writer::empty_tag('img', array('src'=>$OUTPUT->pix_url('spacer'), 'alt'=>'', 'class'=>'iconsmall'));
 241         }
 242         ++$updowncount;
 243
 244         if ($plugin->can_delete_instance($instance)) {
 245             $aurl = new moodle_url($url, array('action'=>'delete', 'instance'=>$instance->id));
 246             $edit[] = $OUTPUT->action_icon($aurl, new pix_icon('t/delete', $strdelete, 'core', array('class' => 'iconsmall')));
 247         }
 248
 249         if (enrol_is_enabled($instance->enrol) && $plugin->can_hide_show_instance($instance)) {
 250             if ($instance->status == ENROL_INSTANCE_ENABLED) {
 251                 $aurl = new moodle_url($url, array('action'=>'disable', 'instance'=>$instance->id));
 252                 $edit[] = $OUTPUT->action_icon($aurl, new pix_icon('t/hide', $strdisable, 'core', array('class' => 'iconsmall')));
 253             } else if ($instance->status == ENROL_INSTANCE_DISABLED) {
 254                 $aurl = new moodle_url($url, array('action'=>'enable', 'instance'=>$instance->id));
 255                 $edit[] = $OUTPUT->action_icon($aurl, new pix_icon('t/show', $strenable, 'core', array('class' => 'iconsmall')));
 256             } else {
 257                 // plugin specific state - do not mess with it!
 258                 $edit[] = html_writer::empty_tag('img', array('src'=>$OUTPUT->pix_url('t/show'), 'alt'=>'', 'class'=>'iconsmall'));
 259             }
 260
 261         }
 262     }
 263
 264     // link to instance management
 265     if (enrol_is_enabled($instance->enrol) && $canconfig) {
 266         if ($icons = $plugin->get_action_icons($instance)) {
 267             $edit = array_merge($edit, $icons);
 268         }
 269     }
 270
 271     // add a row to the table
 272     $table->data[] = array($displayname, $users, implode('&nbsp;', $updown), implode('&nbsp;', $edit));
 273
 274 }
 275 echo html_writer::table($table);
 276
 277 // access security is in each plugin
 278 $candidates = array();
 279 foreach (enrol_get_plugins(true) as $name=>$plugin) {
 280     if (!$link = $plugin->get_newinstance_link($course->id)) {
 281         continue;
 282     }
 283     $candidates[$link->out(false)] = get_string('pluginname', 'enrol_'.$name);
 284 }
 285
 286 if ($candidates) {
 287     $select = new url_select($candidates);
 288     $select->set_label(get_string('addinstance', 'enrol'));
 289     echo $OUTPUT->render($select);
 290 }
 291
 292 echo $OUTPUT->box_end();
 293
 294 echo $OUTPUT->footer();