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Differences Between: [Versions 310 and 402] [Versions 311 and 402] [Versions 39 and 402] [Versions 400 and 402]

   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   * Delete category form.
  19   *
  20   * @package core_course
  21   * @copyright 2002 onwards Martin Dougiamas (http://dougiamas.com)
  22   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  defined('MOODLE_INTERNAL') || die;
  26  
  27  require_once($CFG->libdir . '/formslib.php');
  28  require_once($CFG->libdir . '/questionlib.php');
  29  
  30  /**
  31   * Delete category moodleform.
  32   * @package core_course
  33   * @copyright 2002 onwards Martin Dougiamas (http://dougiamas.com)
  34   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  35   */
  36  class core_course_deletecategory_form extends moodleform {
  37  
  38      /**
  39       * The core_course_category object for that category being deleted.
  40       * @var core_course_category
  41       */
  42      protected $coursecat;
  43  
  44      /**
  45       * Defines the form.
  46       */
  47      public function definition() {
  48          $mform = $this->_form;
  49          $this->coursecat = $this->_customdata;
  50  
  51          $categorycontext = context_coursecat::instance($this->coursecat->id);
  52          $categoryname = $this->coursecat->get_formatted_name();
  53  
  54          // Check permissions, to see if it OK to give the option to delete
  55          // the contents, rather than move elsewhere.
  56          $candeletecontent = $this->coursecat->can_delete_full();
  57  
  58          // Get the list of categories we might be able to move to.
  59          $displaylist = $this->coursecat->move_content_targets_list();
  60  
  61          // Now build the options.
  62          $options = array();
  63          if ($displaylist) {
  64              $options[0] = get_string('movecontentstoanothercategory');
  65          }
  66          if ($candeletecontent) {
  67              $options[1] = get_string('deleteallcannotundo');
  68          }
  69          if (empty($options)) {
  70              throw new \moodle_exception('youcannotdeletecategory', 'error', 'index.php', $categoryname);
  71          }
  72  
  73          // Now build the form.
  74          $mform->addElement('header', 'general', get_string('categorycurrentcontents', '', $categoryname));
  75  
  76          // Describe the contents of this category.
  77          $contents = '';
  78          if ($this->coursecat->has_children()) {
  79              $contents .= html_writer::tag('li', get_string('subcategories'));
  80          }
  81          if ($this->coursecat->has_courses()) {
  82              $contents .= html_writer::tag('li', get_string('courses'));
  83          }
  84          if (question_context_has_any_questions($categorycontext)) {
  85              $contents .= html_writer::tag('li', get_string('questionsinthequestionbank'));
  86          }
  87  
  88          // Check if plugins can provide more info.
  89          $pluginfunctions = $this->coursecat->get_plugins_callback_function('get_course_category_contents');
  90          foreach ($pluginfunctions as $pluginfunction) {
  91              if ($plugincontents = $pluginfunction($this->coursecat)) {
  92                  $contents .= html_writer::tag('li', $plugincontents);
  93              }
  94          }
  95  
  96          if (!empty($contents)) {
  97              $mform->addElement('static', 'emptymessage', get_string('thiscategorycontains'), html_writer::tag('ul', $contents));
  98          } else {
  99              $mform->addElement('static', 'emptymessage', '', get_string('deletecategoryempty'));
 100          }
 101  
 102          // Give the options for what to do.
 103          $mform->addElement('select', 'fulldelete', get_string('whattodo'), $options);
 104  
 105          if (count($options) == 1) {
 106              // Freeze selector if only one option available.
 107              $optionkeys = array_keys($options);
 108              $option = reset($optionkeys);
 109              $mform->hardFreeze('fulldelete');
 110              $mform->setConstant('fulldelete', $option);
 111          }
 112  
 113          if ($displaylist) {
 114              $mform->addElement('autocomplete', 'newparent', get_string('movecategorycontentto'), $displaylist);
 115              if (in_array($this->coursecat->parent, $displaylist)) {
 116                  $mform->setDefault('newparent', $this->coursecat->parent);
 117              }
 118              $mform->hideIf('newparent', 'fulldelete', 'eq', '1');
 119          }
 120  
 121          $mform->addElement('hidden', 'categoryid', $this->coursecat->id);
 122          $mform->setType('categoryid', PARAM_ALPHANUM);
 123          $mform->addElement('hidden', 'action', 'deletecategory');
 124          $mform->setType('action', PARAM_ALPHANUM);
 125  
 126          $this->add_action_buttons(true, get_string('delete'));
 127      }
 128  
 129      /**
 130       * Perform some extra moodle validation.
 131       *
 132       * @param array $data
 133       * @param array $files
 134       * @return array An array of errors.
 135       */
 136      public function validation($data, $files) {
 137          $errors = parent::validation($data, $files);
 138          if (empty($data['fulldelete']) && empty($data['newparent'])) {
 139              // When they have chosen the move option, they must specify a destination.
 140              $errors['newparent'] = get_string('required');
 141              return $errors;
 142          }
 143  
 144          if (!empty($data['newparent']) && !$this->coursecat->can_move_content_to($data['newparent'])) {
 145              $errors['newparent'] = get_string('movecatcontentstoselected', 'error');
 146          }
 147  
 148          return $errors;
 149      }
 150  }