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Differences Between: [Versions 311 and 401] [Versions 311 and 402] [Versions 311 and 403] [Versions 39 and 311]

   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  /**
  19   * Course selector field.
  20   *
  21   * Allows auto-complete ajax searching for cohort.
  22   *
  23   * @package   core_form
  24   * @copyright 2015 Damyon Wiese <damyon@moodle.com>
  25   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  26   */
  27  
  28  global $CFG;
  29  require_once($CFG->libdir . '/form/autocomplete.php');
  30  require_once($CFG->dirroot . '/cohort/lib.php');
  31  
  32  /**
  33   * Form field type for choosing a cohort.
  34   *
  35   * Allows auto-complete ajax searching for cohort.
  36   *
  37   * @package   core_form
  38   * @copyright 2016 Damyon Wiese <damyon@moodle.com>
  39   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  40   */
  41  class MoodleQuickForm_cohort extends MoodleQuickForm_autocomplete {
  42  
  43      /**
  44       * @var array $exclude Exclude a list of cohorts from the list (e.g. the current cohort).
  45       */
  46      protected $exclude = array();
  47  
  48      /**
  49       * @var int $contextid The context id to fetch cohorts in.
  50       */
  51      protected $contextid = 0;
  52  
  53      /**
  54       * @var boolean $allowmultiple Allow selecting more than one cohort.
  55       */
  56      protected $multiple = false;
  57  
  58      /**
  59       * @var array $requiredcapabilities Array of extra capabilities to check at the cohort context.
  60       */
  61      protected $requiredcapabilities = array();
  62  
  63      /**
  64       * Constructor
  65       *
  66       * @param string $elementname Element name
  67       * @param mixed $elementlabel Label(s) for an element
  68       * @param array $options Options to control the element's display
  69       *                       Valid options are:
  70       *                       'multiple' - boolean multi select
  71       *                       'exclude' - array or int, list of course ids to never show
  72       *                       'requiredcapabilities' - array of capabilities. Uses ANY to combine them.
  73       */
  74      public function __construct($elementname = null, $elementlabel = null, $options = array()) {
  75          if (isset($options['multiple'])) {
  76              $this->multiple = $options['multiple'];
  77          }
  78          if (isset($options['contextid'])) {
  79              $this->contextid = $options['contextid'];
  80          } else {
  81              $this->contextid = context_system::instance()->id;
  82          }
  83          if (isset($options['exclude'])) {
  84              $this->exclude = $options['exclude'];
  85              if (!is_array($this->exclude)) {
  86                  $this->exclude = array($this->exclude);
  87              }
  88          }
  89          if (isset($options['requiredcapabilities'])) {
  90              $this->requiredcapabilities = $options['requiredcapabilities'];
  91          }
  92  
  93          $validattributes = array(
  94              'ajax' => 'core/form-cohort-selector',
  95              'data-exclude' => implode(',', $this->exclude),
  96              'data-contextid' => (int)$this->contextid
  97          );
  98          if ($this->multiple) {
  99              $validattributes['multiple'] = 'multiple';
 100          }
 101          if (isset($options['noselectionstring'])) {
 102              $validattributes['noselectionstring'] = $options['noselectionstring'];
 103          }
 104          if (isset($options['placeholder'])) {
 105              $validattributes['placeholder'] = $options['placeholder'];
 106          }
 107  
 108          parent::__construct($elementname, $elementlabel, array(), $validattributes);
 109      }
 110  
 111      /**
 112       * Set the value of this element. If values can be added or are unknown, we will
 113       * make sure they exist in the options array.
 114       * @param string|array $value The value to set.
 115       * @return boolean
 116       */
 117      public function setValue($value) {
 118          global $DB;
 119          $values = (array) $value;
 120          $cohortstofetch = array();
 121  
 122          foreach ($values as $onevalue) {
 123              if ($onevalue && !$this->optionExists($onevalue) &&
 124                      ($onevalue !== '_qf__force_multiselect_submission')) {
 125                  array_push($cohortstofetch, $onevalue);
 126              }
 127          }
 128  
 129          if (empty($cohortstofetch)) {
 130              $this->setSelected($values);
 131              return true;
 132          }
 133  
 134          list($whereclause, $params) = $DB->get_in_or_equal($cohortstofetch, SQL_PARAMS_NAMED, 'id');
 135  
 136          $list = $DB->get_records_select('cohort', 'id ' . $whereclause, $params, 'name');
 137  
 138          $currentcontext = context_helper::instance_by_id($this->contextid);
 139          foreach ($list as $cohort) {
 140              // Make sure we can see the cohort.
 141              if (!cohort_can_view_cohort($cohort, $currentcontext)) {
 142                  continue;
 143              }
 144              $label = format_string($cohort->name, true, $currentcontext);
 145              $this->addOption($label, $cohort->id);
 146          }
 147  
 148          $this->setSelected($values);
 149          return true;
 150      }
 151  }