Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * Course selector field.

 *

 * Allows auto-complete ajax searching for cohort.

 *

 * @package   core_form

 * @copyright 2015 Damyon Wiese <damyon@moodle.com>

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

global $CFG;

require_once($CFG->libdir . '/form/autocomplete.php');

require_once($CFG->dirroot . '/cohort/lib.php');

/**

 * Form field type for choosing a cohort.

 *

 * Allows auto-complete ajax searching for cohort.

 *

 * @package   core_form

 * @copyright 2016 Damyon Wiese <damyon@moodle.com>

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class MoodleQuickForm_cohort extends MoodleQuickForm_autocomplete {

    /**

     * @var array $exclude Exclude a list of cohorts from the list (e.g. the current cohort).

     */

    protected $exclude = array();

    /**

     * @var int $contextid The context id to fetch cohorts in.

     */

    protected $contextid = 0;

    /**

     * @var boolean $allowmultiple Allow selecting more than one cohort.

     */

    protected $multiple = false;

    /**

     * @var array $requiredcapabilities Array of extra capabilities to check at the cohort context.

     */

    protected $requiredcapabilities = array();

    /**

     * Constructor

     *

     * @param string $elementname Element name

     * @param mixed $elementlabel Label(s) for an element

     * @param array $options Options to control the element's display

     *                       Valid options are:

     *                       'multiple' - boolean multi select

     *                       'exclude' - array or int, list of course ids to never show

     *                       'requiredcapabilities' - array of capabilities. Uses ANY to combine them.

     */

    public function __construct($elementname = null, $elementlabel = null, $options = array()) {

        if (isset($options['multiple'])) {

            $this->multiple = $options['multiple'];

        }

        if (isset($options['contextid'])) {

            $this->contextid = $options['contextid'];

        } else {

            $this->contextid = context_system::instance()->id;

        }

        if (isset($options['exclude'])) {

            $this->exclude = $options['exclude'];

            if (!is_array($this->exclude)) {

                $this->exclude = array($this->exclude);

            }

        }

        if (isset($options['requiredcapabilities'])) {

            $this->requiredcapabilities = $options['requiredcapabilities'];

        }

        $validattributes = array(

            'ajax' => 'core/form-cohort-selector',

            'data-exclude' => implode(',', $this->exclude),

            'data-contextid' => (int)$this->contextid

        );

        if ($this->multiple) {

            $validattributes['multiple'] = 'multiple';

        }

        if (isset($options['noselectionstring'])) {

            $validattributes['noselectionstring'] = $options['noselectionstring'];

        }

        if (isset($options['placeholder'])) {

            $validattributes['placeholder'] = $options['placeholder'];

        }

        parent::__construct($elementname, $elementlabel, array(), $validattributes);

    }

    /**

     * Set the value of this element. If values can be added or are unknown, we will

     * make sure they exist in the options array.

     * @param string|array $value The value to set.

     * @return boolean

     */

    public function setValue($value) {

        global $DB;

        $values = (array) $value;

        $cohortstofetch = array();

        foreach ($values as $onevalue) {

            if ($onevalue && !$this->optionExists($onevalue) &&

                    ($onevalue !== '_qf__force_multiselect_submission')) {

                array_push($cohortstofetch, $onevalue);

            }

        }

        if (empty($cohortstofetch)) {

            $this->setSelected($values);

            return true;

        }

        list($whereclause, $params) = $DB->get_in_or_equal($cohortstofetch, SQL_PARAMS_NAMED, 'id');

        $list = $DB->get_records_select('cohort', 'id ' . $whereclause, $params, 'name');

        $currentcontext = context_helper::instance_by_id($this->contextid);

        foreach ($list as $cohort) {

            // Make sure we can see the cohort.

            if (!cohort_can_view_cohort($cohort, $currentcontext)) {

                continue;

            }

            $label = format_string($cohort->name, true, ['context' => $currentcontext]);

            $this->addOption($label, $cohort->id);

        }

        $this->setSelected($values);

        return true;

    }

}