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<?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/>.
/**
* Generic checkbox filter.
*
* This will create generic filter with checkbox option and can be used for
* disabling other elements for specific condition.
*
* @package core_user
* @category user
* @copyright 2011 Rajesh Taneja
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
require_once($CFG->dirroot.'/user/filters/lib.php');
/**
* Generic filter based for checkbox and can be used for disabling items
* @copyright 1999 Martin Dougiamas http://dougiamas.com
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class user_filter_checkbox extends user_filter_type {
/**
* list of all the fields which needs to be disabled, if checkbox is checked
* @var array
*/
protected $disableelements = array();
/**
* name of user table field/fields on which data needs to be compared
* @var mixed
*/
protected $field;
/**
* Constructor, initalize user_filter_type and sets $disableelements array
* with list of elements to be diabled by checkbox.
*
* @param string $name the name of the filter instance
* @param string $label the label of the filter instance
* @param boolean $advanced advanced form element flag
* @param mixed $field user table field/fields name for comparison
* @param array $disableelements name of fields which should be disabled if this checkbox is checked.
*/
public function __construct($name, $label, $advanced, $field, $disableelements=null) {
parent::__construct($name, $label, $advanced);
$this->field = $field;
if (!empty($disableelements)) {
if (!is_array($disableelements)) {
$this->disableelements = array($disableelements);
} else {
$this->disableelements = $disableelements;
}
}
}
/**
* Adds controls specific to this filter in the form.
*
* @param moodleform $mform a MoodleQuickForm object in which element will be added
*/
public function setupForm(&$mform) {
$mform->addElement('checkbox', $this->_name, $this->_label, '');
if ($this->_advanced) {
$mform->setAdvanced($this->_name);
}
// Check if disable if options are set. if yes then set rules.
if (!empty($this->disableelements) && is_array($this->disableelements)) {
foreach ($this->disableelements as $disableelement) {
$mform->disabledIf($disableelement, $this->_name, 'checked');
}
}
}
/**
* Retrieves data from the form data
*
* @param object $formdata data submited with the form
* @return mixed array filter data or false when filter not set
*/
public function check_data($formdata) {
$field = $this->_name;
// Check if disable if options are set. if yes then don't add this..
if (!empty($this->disableelements) && is_array($this->disableelements)) {
foreach ($this->disableelements as $disableelement) {
if (property_exists($formdata, $disableelement)) {
return false;
}
}
}
if (property_exists($formdata, $field) and $formdata->$field !== '') {
return array('value' => (string)$formdata->$field);
}
return false;
}
/**
* Returns the condition to be used with SQL where
*
* @param array $data filter settings
* @return array sql string and $params
*/
public function get_sql_filter($data) {
$field = $this->field;
if (is_array($field)) {
$res = " {$field[0]} = {$field[1]} ";
} else {
$res = " {$field} = 0 ";
}
return array($res, array());
}
/**
* Returns a human friendly description of the filter used as label.
*
* @param array $data filter settings
* @return string active filter label
*/
public function get_label($data) {
return $this->_label;
}
}