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279 lines
12 KiB
279 lines
12 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Creates an element with a dropdown Default/Custom and an input for the value (text or date_selector)
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*
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* @package core_form
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* @copyright 2017 Marina Glancy
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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global $CFG;
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require_once($CFG->libdir . '/form/group.php');
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require_once($CFG->libdir . '/formslib.php');
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/**
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* Creates an element with a dropdown Default/Custom and an input for the value (text or date_selector)
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*
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* @package core_form
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* @copyright 2017 Marina Glancy
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class MoodleQuickForm_defaultcustom extends MoodleQuickForm_group {
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/**
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* @var array These complement separators, they are appended to the resultant HTML.
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*/
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protected $_wrap = array('', '');
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/**
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* @var null|bool Keeps track of whether the date selector was initialised using createElement
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* or addElement. If true, createElement was used signifying the element has been
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* added to a group - see MDL-39187.
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*/
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protected $_usedcreateelement = true;
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/** @var array */
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protected $_options;
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/**
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* Constructor
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*
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* @param string $elementname Element's name
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* @param mixed $elementlabel Label(s) for an element
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* @param array $options Options to control the element's display
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* @param mixed $attributes Either a typical HTML attribute string or an associative array
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*/
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public function __construct($elementname = null, $elementlabel = null, $options = array(), $attributes = null) {
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parent::__construct($elementname, $elementlabel);
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$this->setAttributes($attributes);
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$this->_appendName = true;
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$this->_type = 'defaultcustom';
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$calendartype = \core_calendar\type_factory::get_calendar_instance();
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$this->_options = [
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'type' => 'text', // Type of the element. Supported are 'text' and 'date_selector'.
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'defaultvalue' => null, // Value to be used when not overridden.
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'customvalue' => null, // Value to be used when overwriting.
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'customlabel' => get_string('custom', 'form'), // Label for 'customize' checkbox
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// Other options are the same as the ones that can be passed to 'date_selector' element.
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'timezone' => 99,
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'startyear' => $calendartype->get_min_year(),
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'stopyear' => $calendartype->get_max_year(),
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'defaulttime' => 0,
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'step' => 1,
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'optional' => false,
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];
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if (is_array($options)) {
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foreach ($options as $name => $value) {
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if (array_key_exists($name, $this->_options)) {
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if ($name === 'type' && !in_array($value, ['text', 'date_selector', 'date_time_selector'])) {
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throw new coding_exception('Only text, date_selector, and date_time_selector elements are supported in ' . $this->_type);
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}
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if ($name === 'optional' && $value) {
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throw new coding_exception('Date selector can not be optional in ' . $this->_type);
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}
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$this->_options[$name] = $value;
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}
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}
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}
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}
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/**
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* Converts timestamp to the day/month/year array in the current calendar format
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* @param int $value
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* @return array
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*/
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protected function timestamp_to_date_array($value) {
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$calendartype = \core_calendar\type_factory::get_calendar_instance();
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$currentdate = $calendartype->timestamp_to_date_array($value, $this->_options['timezone']);
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return array(
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'minute' => $currentdate['minutes'],
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'hour' => $currentdate['hours'],
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'day' => $currentdate['mday'],
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'month' => $currentdate['mon'],
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'year' => $currentdate['year']);
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}
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/**
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* Should this element have default/custom switch?
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*
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* @return bool
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*/
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protected function has_customize_switch() {
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return $this->_options['defaultvalue'] !== null;
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}
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/**
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* This will create all elements in the group
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*/
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public function _createElements() {
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if (!$this->has_customize_switch()) {
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$element = $this->createFormElement('hidden', 'customize', 1);
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} else {
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$element = $this->createFormElement('advcheckbox', 'customize', '', $this->_options['customlabel']);
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}
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$this->_elements[] = $element;
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if ($this->_options['type'] === 'text') {
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$element = $this->createFormElement($this->_options['type'], 'value',
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get_string('newvaluefor', 'form', $this->getLabel()), $this->getAttributes());
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$element->setHiddenLabel(true);
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} else if ($this->_options['type'] === 'date_selector') {
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$element = $this->createFormElement($this->_options['type'], 'value', '', $this->_options,
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$this->getAttributes());
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} else if ($this->_options['type'] === 'date_time_selector') {
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$element = $this->createFormElement($this->_options['type'], 'value', '', $this->_options,
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$this->getAttributes());
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}
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$this->_elements[] = $element;
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}
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/**
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* Called by HTML_QuickForm whenever form event is made on this element
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*
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* @param string $event Name of event
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* @param mixed $arg event arguments
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* @param object $caller calling object
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* @return bool
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*/
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public function onQuickFormEvent($event, $arg, &$caller) {
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$this->setMoodleForm($caller);
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switch ($event) {
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case 'updateValue':
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// Constant values override both default and submitted ones
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// default values are overriden by submitted.
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$value = $this->_findValue($caller->_constantValues);
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if (null === $value) {
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// If no boxes were checked, then there is no value in the array
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// yet we don't want to display default value in this case.
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if ($caller->isSubmitted()) {
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$value = $this->_findValue($caller->_submitValues);
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} else {
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$value = $this->_findValue($caller->_defaultValues);
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}
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}
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if (!is_array($value)) {
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$customize = ($value !== false || !$this->has_customize_switch());
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if ($this->_options['type'] === 'text') {
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$elementvalue = $customize ? $value : $this->_options['defaultvalue'];
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} else {
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$elementvalue = $this->timestamp_to_date_array($customize ? $value : $this->_options['defaultvalue']);
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}
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$value = [
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'customize' => $customize,
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'value' => $elementvalue
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];
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}
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$this->setValue($value);
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break;
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case 'createElement':
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$rv = parent::onQuickFormEvent($event, $arg, $caller);
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if ($this->has_customize_switch()) {
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if ($this->_options['type'] === 'text') {
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$caller->disabledIf($arg[0] . '[value]', $arg[0] . '[customize]', 'notchecked');
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} else if ($this->_options['type'] === 'date_selector') {
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$caller->disabledIf($arg[0] . '[value][day]', $arg[0] . '[customize]', 'notchecked');
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$caller->disabledIf($arg[0] . '[value][month]', $arg[0] . '[customize]', 'notchecked');
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$caller->disabledIf($arg[0] . '[value][year]', $arg[0] . '[customize]', 'notchecked');
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} else {
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// Date / Time selector.
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$caller->disabledIf($arg[0] . '[value][day]', $arg[0] . '[customize]', 'notchecked');
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$caller->disabledIf($arg[0] . '[value][month]', $arg[0] . '[customize]', 'notchecked');
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$caller->disabledIf($arg[0] . '[value][year]', $arg[0] . '[customize]', 'notchecked');
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$caller->disabledIf($arg[0] . '[value][hour]', $arg[0] . '[customize]', 'notchecked');
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$caller->disabledIf($arg[0] . '[value][minute]', $arg[0] . '[customize]', 'notchecked');
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}
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}
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return $rv;
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case 'addElement':
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$this->_usedcreateelement = false;
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return parent::onQuickFormEvent($event, $arg, $caller);
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break;
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default:
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return parent::onQuickFormEvent($event, $arg, $caller);
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}
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}
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public function freeze() {
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parent::freeze();
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$this->setPersistantFreeze(true);
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}
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public function toHtml() {
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include_once('HTML/QuickForm/Renderer/Default.php');
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$renderer = new HTML_QuickForm_Renderer_Default();
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$renderer->setElementTemplate('{element}');
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parent::accept($renderer);
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$html = $this->_wrap[0];
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if ($this->_usedcreateelement) {
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$html .= html_writer::tag('span', $renderer->toHtml(), array('class' => 'fdefaultcustom'));
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} else {
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$html .= $renderer->toHtml();
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}
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$html .= $this->_wrap[1];
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return $html;
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}
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public function accept(&$renderer, $required = false, $error = null) {
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global $PAGE;
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if (!$this->_flagFrozen && $this->has_customize_switch()) {
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// Add JS to the default/custom switch.
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$firstelement = reset($this->_elements);
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$defaultvalue = $this->_options['defaultvalue'];
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$customvalue = $this->_options['customvalue'];
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if ($this->_options['type'] === 'date_selector' || $this->_options['type'] === 'date_time_selector') {
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$defaultvalue = $this->timestamp_to_date_array($defaultvalue);
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$customvalue = $this->timestamp_to_date_array($customvalue);
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}
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$firstelement->updateAttributes(['data-defaultcustom' => 'true',
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'data-type' => $this->_options['type'],
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'data-defaultvalue' => json_encode($defaultvalue),
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'data-customvalue' => json_encode($customvalue)]);
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$PAGE->requires->js_amd_inline("require(['core_form/defaultcustom'], function() {});");
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}
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$renderer->renderElement($this, $required, $error);
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}
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/**
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* Output a value. Give it the name of the group. In case of "default" return false.
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*
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* @param array $submitvalues values submitted.
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* @param bool $assoc specifies if returned array is associative
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* @return array
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*/
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public function exportValue(&$submitvalues, $assoc = false) {
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$valuearray = array();
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foreach ($this->_elements as $element) {
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$thisexport = $element->exportValue($submitvalues[$this->getName()], true);
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if ($thisexport != null) {
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$valuearray += $thisexport;
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}
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}
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if (empty($valuearray['customize'])) {
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return $this->_prepareValue(false, $assoc);
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}
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return array_key_exists('value', $valuearray) ? $this->_prepareValue($valuearray['value'], $assoc) : [];
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}
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}
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