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/>.

/**

 * Group of date input element

 *

 * Contains class for a group of elements used to input a date.

 *

 * @package   core_form

 * @copyright 2007 Jamie Pratt <me@jamiep.org>

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

 */

global $CFG;

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

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

/**

 * Class for a group of elements used to input a date.

 *

 * Emulates moodle print_date_selector function

 *

 * @package   core_form

 * @category  form

 * @copyright 2007 Jamie Pratt <me@jamiep.org>

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

 */

class MoodleQuickForm_date_selector extends MoodleQuickForm_group {

    /**

     * Control the fieldnames for form elements.

     *

     * startyear => int start of range of years that can be selected

     * stopyear => int last year that can be selected

     * timezone => int|float|string (optional) timezone modifier used for edge case only.

     *      If not specified, then date is caclulated based on current user timezone.

     *      Note: dst will be calculated for string timezones only

     *      {@link https://moodledev.io/docs/apis/subsystems/time#timezone}

     * optional => if true, show a checkbox beside the date to turn it on (or off)

     * @var array

     */

    protected $_options = array();

    /**

     * @var array These complement separators, they are appended to the resultant HTML.

     */

    protected $_wrap = array('', '');

    /**

     * @var null|bool Keeps track of whether the date selector was initialised using createElement

     *                or addElement. If true, createElement was used signifying the element has been

     *                added to a group - see MDL-39187.

     */

    protected $_usedcreateelement = true;

    /**

     * constructor

     *

     * @param string $elementName Element's name

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

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

     * @param mixed $attributes Either a typical HTML attribute string or an associative array

     */

    public function __construct($elementName = null, $elementLabel = null, $options = array(), $attributes = null) {

        // Get the calendar type used - see MDL-18375.

        $calendartype = \core_calendar\type_factory::get_calendar_instance();

        $this->_options = array('startyear' => $calendartype->get_min_year(), 'stopyear' => $calendartype->get_max_year(),

            'defaulttime' => 0, 'timezone' => 99, 'step' => 1, 'optional' => false);

        // TODO MDL-52313 Replace with the call to parent::__construct().

        HTML_QuickForm_element::__construct($elementName, $elementLabel, $attributes);

        $this->_persistantFreeze = true;

        $this->_appendName = true;

        $this->_type = 'date_selector';

        // set the options, do not bother setting bogus ones

        if (is_array($options)) {

            foreach ($options as $name => $value) {

                if (isset($this->_options[$name])) {

                    if (is_array($value) && is_array($this->_options[$name])) {

                        $this->_options[$name] = @array_merge($this->_options[$name], $value);

                    } else {

                        $this->_options[$name] = $value;

                    }

                }

            }

        }

    }

    /**

     * Old syntax of class constructor. Deprecated in PHP7.

     *

     * @deprecated since Moodle 3.1

     */

    public function MoodleQuickForm_date_selector($elementName = null, $elementLabel = null, $options = array(), $attributes = null) {

        debugging('Use of class name as constructor is deprecated', DEBUG_DEVELOPER);

        self::__construct($elementName, $elementLabel, $options, $attributes);

    }

    /**

     * This will create date group element constisting of day, month and year.

     *

     * @access private

     */

    function _createElements() {

        global $OUTPUT;

        // Get the calendar type used - see MDL-18375.

        $calendartype = \core_calendar\type_factory::get_calendar_instance();

        $this->_elements = array();

        $dateformat = $calendartype->get_date_order($this->_options['startyear'], $this->_options['stopyear']);

        // Reverse date element (Day, Month, Year), in RTL mode.

        if (right_to_left()) {

            $dateformat = array_reverse($dateformat);

        }

        // If optional we add a checkbox which the user can use to turn if on.

        if ($this->_options['optional']) {

            $this->_elements[] = $this->createFormElement('checkbox', 'enabled', null,

                get_string('enable'), $this->getAttributesForFormElement(), true);

        }

        foreach ($dateformat as $key => $value) {

            // E_STRICT creating elements without forms is nasty because it internally uses $this

            $this->_elements[] = $this->createFormElement('select', $key, get_string($key, 'form'), $value,

                $this->getAttributesForFormElement(), true);

        }

        // The YUI2 calendar only supports the gregorian calendar type so only display the calendar image if this is being used.

        if ($calendartype->get_name() === 'gregorian') {

            $image = $OUTPUT->pix_icon('i/calendar', get_string('calendar', 'calendar'), 'moodle');

            $this->_elements[] = $this->createFormElement('link', 'calendar',

                    null, '#', $image);

        }

        foreach ($this->_elements as $element){

            if (method_exists($element, 'setHiddenLabel')){

                $element->setHiddenLabel(true);

            }

        }

    }

    /**

     * Called by HTML_QuickForm whenever form event is made on this element

     *

     * @param string $event Name of event

     * @param mixed $arg event arguments

     * @param object $caller calling object

     * @return bool

     */

    function onQuickFormEvent($event, $arg, &$caller) {

        $this->setMoodleForm($caller);

        switch ($event) {

            case 'updateValue':

                // Constant values override both default and submitted ones

                // default values are overriden by submitted.

                $value = $this->_findValue($caller->_constantValues);

                if (null === $value) {

                    // If no boxes were checked, then there is no value in the array

                    // yet we don't want to display default value in this case.

                    if ($caller->isSubmitted() && !$caller->is_new_repeat($this->getName())) {

                        $value = $this->_findValue($caller->_submitValues);

                    } else {

                        $value = $this->_findValue($caller->_defaultValues);

                    }

                }

                $requestvalue=$value;

                if ($value == 0) {

                    $value = time();

                }

                if (!is_array($value)) {

                    $calendartype = \core_calendar\type_factory::get_calendar_instance();

                    $currentdate = $calendartype->timestamp_to_date_array($value, $this->_options['timezone']);

                    $value = array(

                        'day' => $currentdate['mday'],

                        'month' => $currentdate['mon'],

                        'year' => $currentdate['year']);

                    // If optional, default to off, unless a date was provided.

                    if ($this->_options['optional']) {

                        $value['enabled'] = $requestvalue != 0;

                    }

                } else {

                    $value['enabled'] = isset($value['enabled']);

                }

                if (null !== $value) {

                    $this->setValue($value);

                }

                break;

            case 'createElement':

                // Optional is an optional param, if its set we need to add a disabledIf rule.

                // If its empty or not specified then its not an optional dateselector.

                if (!empty($arg[2]['optional']) && !empty($arg[0])) {

                    // When using the function addElement, rather than createElement, we still

                    // enter this case, making this check necessary.

                    if ($this->_usedcreateelement) {

                        $caller->disabledIf($arg[0] . '[day]', $arg[0] . '[enabled]');

                        $caller->disabledIf($arg[0] . '[month]', $arg[0] . '[enabled]');

                        $caller->disabledIf($arg[0] . '[year]', $arg[0] . '[enabled]');

                    } else {

                        $caller->disabledIf($arg[0], $arg[0] . '[enabled]');

                    }

                }

                return parent::onQuickFormEvent($event, $arg, $caller);

                break;

            case 'addElement':

                $this->_usedcreateelement = false;

                return parent::onQuickFormEvent($event, $arg, $caller);

                break;

            default:

                return parent::onQuickFormEvent($event, $arg, $caller);

        }

    }

    /**

     * Returns HTML for advchecbox form element.

     *

     * @return string

     */

    function toHtml() {

        include_once('HTML/QuickForm/Renderer/Default.php');

        $renderer = new HTML_QuickForm_Renderer_Default();

        $renderer->setElementTemplate('{element}');

        parent::accept($renderer);

        $html = $this->_wrap[0];

        if ($this->_usedcreateelement) {

            $html .= html_writer::tag('span', $renderer->toHtml(), array('class' => 'fdate_selector'));

        } else {

            $html .= $renderer->toHtml();

        }

        $html .= $this->_wrap[1];

        return $html;

    }

    /**

     * Accepts a renderer

     *

     * @param HTML_QuickForm_Renderer $renderer An HTML_QuickForm_Renderer object

     * @param bool $required Whether a group is required

     * @param string $error An error message associated with a group

     */

    function accept(&$renderer, $required = false, $error = null) {

        form_init_date_js();

        $renderer->renderElement($this, $required, $error);

    }

    /**

     * Export for template

     *

     * @param renderer_base $output

     * @return array|stdClass

     */

    public function export_for_template(renderer_base $output) {

        form_init_date_js();

        return parent::export_for_template($output);

    }

    /**

     * Output a timestamp. Give it the name of the group.

     *

     * @param array $submitValues values submitted.

     * @param bool $assoc specifies if returned array is associative

     * @return array

     */

    function exportValue(&$submitValues, $assoc = false) {

        $valuearray = array();

        foreach ($this->_elements as $element){

            $thisexport = $element->exportValue($submitValues[$this->getName()], true);

            if ($thisexport!=null){

                $valuearray += $thisexport;

            }

        }

        if (count($valuearray) && isset($valuearray['year'])) {

            if($this->_options['optional']) {

                // If checkbox is on, the value is zero, so go no further

                if(empty($valuearray['enabled'])) {

                    return $this->_prepareValue(0, $assoc);

                }

            }

            // Get the calendar type used - see MDL-18375.

            $calendartype = \core_calendar\type_factory::get_calendar_instance();

            $gregoriandate = $calendartype->convert_to_gregorian($valuearray['year'], $valuearray['month'], $valuearray['day']);

            $value = make_timestamp($gregoriandate['year'],

                                                      $gregoriandate['month'],

                                                      $gregoriandate['day'],

                                                      0, 0, 0,

                                                      $this->_options['timezone'],

                                                      true);

            return $this->_prepareValue($value, $assoc);

        } else {

            return null;

        }

    }

}