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<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @package       Cake.View.Helper
 * @since         CakePHP(tm) v 1.3
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */

App::uses('JsBaseEngineHelper', 'View/Helper');

/**
 * MooTools Engine Helper for JsHelper
 *
 * Provides MooTools specific JavaScript for JsHelper.
 * Assumes that you have the following MooTools packages
 *
 * - Remote, Remote.HTML, Remote.JSON
 * - Fx, Fx.Tween, Fx.Morph
 * - Selectors, DomReady,
 * - Drag, Drag.Move
 *
 * @package       Cake.View.Helper
 */
class MootoolsEngineHelper extends JsBaseEngineHelper {

/**
 * Option mappings for MooTools
 *
 * @var array
 */
        protected $_optionMap = array(
                'request' => array(
                        'complete' => 'onComplete',
                        'success' => 'onSuccess',
                        'before' => 'onRequest',
                        'error' => 'onFailure'
                ),
                'sortable' => array(
                        'distance' => 'snap',
                        'containment' => 'constrain',
                        'sort' => 'onSort',
                        'complete' => 'onComplete',
                        'start' => 'onStart',
                ),
                'drag' => array(
                        'snapGrid' => 'snap',
                        'start' => 'onStart',
                        'drag' => 'onDrag',
                        'stop' => 'onComplete',
                ),
                'drop' => array(
                        'drop' => 'onDrop',
                        'hover' => 'onEnter',
                        'leave' => 'onLeave',
                ),
                'slider' => array(
                        'complete' => 'onComplete',
                        'change' => 'onChange',
                        'direction' => 'mode',
                        'step' => 'steps'
                )
        );

/**
 * Contains a list of callback names -> default arguments.
 *
 * @var array
 */
        protected $_callbackArguments = array(
                'slider' => array(
                        'onTick' => 'position',
                        'onChange' => 'step',
                        'onComplete' => 'event'
                ),
                'request' => array(
                        'onRequest' => '',
                        'onComplete' => '',
                        'onCancel' => '',
                        'onSuccess' => 'responseText, responseXML',
                        'onFailure' => 'xhr',
                        'onException' => 'headerName, value',
                ),
                'drag' => array(
                        'onBeforeStart' => 'element',
                        'onStart' => 'element',
                        'onSnap' => 'element',
                        'onDrag' => 'element, event',
                        'onComplete' => 'element, event',
                        'onCancel' => 'element',
                ),
                'drop' => array(
                        'onBeforeStart' => 'element',
                        'onStart' => 'element',
                        'onSnap' => 'element',
                        'onDrag' => 'element, event',
                        'onComplete' => 'element, event',
                        'onCancel' => 'element',
                        'onDrop' => 'element, droppable, event',
                        'onLeave' => 'element, droppable',
                        'onEnter' => 'element, droppable',
                ),
                'sortable' => array(
                        'onStart' => 'element, clone',
                        'onSort' => 'element, clone',
                        'onComplete' => 'element',
                )
        );

/**
 * Create javascript selector for a CSS rule
 *
 * @param string $selector The selector that is targeted
 * @return MootoolsEngineHelper instance of $this. Allows chained methods.
 */
        public function get($selector) {
                $this->_multipleSelection = false;
                if ($selector === 'window' || $selector === 'document') {
                        $this->selection = "$(" . $selector . ")";
                        return $this;
                }
                if (preg_match('/^#[^\s.]+$/', $selector)) {
                        $this->selection = '$("' . substr($selector, 1) . '")';
                        return $this;
                }
                $this->_multipleSelection = true;
                $this->selection = '$$("' . $selector . '")';
                return $this;
        }

/**
 * Add an event to the script cache. Operates on the currently selected elements.
 *
 * ### Options
 *
 * - 'wrap' - Whether you want the callback wrapped in an anonymous function. (defaults true)
 * - 'stop' - Whether you want the event to stopped. (defaults true)
 *
 * @param string $type Type of event to bind to the current dom id
 * @param string $callback The JavaScript function you wish to trigger or the function literal
 * @param array $options Options for the event.
 * @return string completed event handler
 */
        public function event($type, $callback, $options = array()) {
                $defaults = array('wrap' => true, 'stop' => true);
                $options = array_merge($defaults, $options);

                $function = 'function (event) {%s}';
                if ($options['wrap'] && $options['stop']) {
                        $callback = "event.stop();\n" . $callback;
                }
                if ($options['wrap']) {
                        $callback = sprintf($function, $callback);
                }
                $out = $this->selection . ".addEvent(\"{$type}\", $callback);";
                return $out;
        }

/**
 * Create a domReady event. This is a special event in many libraries
 *
 * @param string $functionBody The code to run on domReady
 * @return string completed domReady method
 */
        public function domReady($functionBody) {
                $this->selection = 'window';
                return $this->event('domready', $functionBody, array('stop' => false));
        }

/**
 * Create an iteration over the current selection result.
 *
 * @param string $callback The function body you wish to apply during the iteration.
 * @return string completed iteration
 */
        public function each($callback) {
                return $this->selection . '.each(function (item, index) {' . $callback . '});';
        }

/**
 * Trigger an Effect.
 *
 * @param string $name The name of the effect to trigger.
 * @param array $options Array of options for the effect.
 * @return string completed string with effect.
 * @see JsBaseEngineHelper::effect()
 */
        public function effect($name, $options = array()) {
                $speed = null;
                if (isset($options['speed']) && in_array($options['speed'], array('fast', 'slow'))) {
                        if ($options['speed'] === 'fast') {
                                $speed = '"short"';
                        } elseif ($options['speed'] === 'slow') {
                                $speed = '"long"';
                        }
                }
                $effect = '';
                switch ($name) {
                        case 'hide':
                                $effect = 'setStyle("display", "none")';
                                break;
                        case 'show':
                                $effect = 'setStyle("display", "")';
                                break;
                        case 'fadeIn':
                        case 'fadeOut':
                        case 'slideIn':
                        case 'slideOut':
                                list($effectName, $direction) = preg_split('/([A-Z][a-z]+)/', $name, -1, PREG_SPLIT_DELIM_CAPTURE);
                                $direction = strtolower($direction);
                                if ($speed) {
                                        $effect .= "set(\"$effectName\", {duration:$speed}).";
                                }
                                $effect .= "$effectName(\"$direction\")";
                                break;
                }
                return $this->selection . '.' . $effect . ';';
        }

/**
 * Create an new Request.
 *
 * Requires `Request`. If you wish to use 'update' key you must have ```Request.HTML```
 * if you wish to do Json requests you will need ```JSON``` and ```Request.JSON```.
 *
 * @param string|array $url
 * @param array $options
 * @return string The completed ajax call.
 */
        public function request($url, $options = array()) {
                $url = html_entity_decode($this->url($url), ENT_COMPAT, Configure::read('App.encoding'));
                $options = $this->_mapOptions('request', $options);
                $type = $data = null;
                if (isset($options['type']) || isset($options['update'])) {
                        if (isset($options['type']) && strtolower($options['type']) === 'json') {
                                $type = '.JSON';
                        }
                        if (isset($options['update'])) {
                                $options['update'] = str_replace('#', '', $options['update']);
                                $type = '.HTML';
                        }
                        unset($options['type']);
                }
                if (!empty($options['data'])) {
                        $data = $options['data'];
                        unset($options['data']);
                }
                $options['url'] = $url;
                $options = $this->_prepareCallbacks('request', $options);
                if (!empty($options['dataExpression'])) {
                        unset($options['dataExpression']);
                } elseif (!empty($data)) {
                        $data = $this->object($data);
                }
                $options = $this->_parseOptions($options, array_keys($this->_callbackArguments['request']));
                return "var jsRequest = new Request$type({{$options}}).send($data);";
        }

/**
 * Create a sortable element.
 *
 * Requires the `Sortables` plugin from MootoolsMore
 *
 * @param array $options Array of options for the sortable.
 * @return string Completed sortable script.
 * @see JsBaseEngineHelper::sortable() for options list.
 */
        public function sortable($options = array()) {
                $options = $this->_processOptions('sortable', $options);
                return 'var jsSortable = new Sortables(' . $this->selection . ', {' . $options . '});';
        }

/**
 * Create a Draggable element.
 *
 * Requires the `Drag` plugin from MootoolsMore
 *
 * @param array $options Array of options for the draggable.
 * @return string Completed draggable script.
 * @see JsHelper::drag() for options list.
 */
        public function drag($options = array()) {
                $options = $this->_processOptions('drag', $options);
                return $this->selection . '.makeDraggable({' . $options . '});';
        }

/**
 * Create a Droppable element.
 *
 * Requires the `Drag` and `Drag.Move` plugins from MootoolsMore
 *
 * Droppables in Mootools function differently from other libraries. Droppables
 * are implemented as an extension of Drag. So in addition to making a get() selection for
 * the droppable element. You must also provide a selector rule to the draggable element. Furthermore,
 * Mootools droppables inherit all options from Drag.
 *
 * @param array $options Array of options for the droppable.
 * @return string Completed droppable script.
 * @see JsBaseEngineHelper::drop() for options list.
 */
        public function drop($options = array()) {
                if (empty($options['drag'])) {
                        trigger_error(
                                __d('cake_dev', '%s requires a "drag" option to properly function'), 'MootoolsEngine::drop()', E_USER_WARNING
                        );
                        return false;
                }
                $options['droppables'] = $this->selection;

                $this->get($options['drag']);
                unset($options['drag']);

                $options = $this->_mapOptions('drag', $this->_mapOptions('drop', $options));
                $options = $this->_prepareCallbacks('drop', $options);
                $safe = array_merge(array_keys($this->_callbackArguments['drop']), array('droppables'));
                $optionString = $this->_parseOptions($options, $safe);
                $out = $this->selection . '.makeDraggable({' . $optionString . '});';
                $this->selection = $options['droppables'];
                return $out;
        }

/**
 * Create a slider control
 *
 * Requires `Slider` from MootoolsMore
 *
 * @param array $options Array of options for the slider.
 * @return string Completed slider script.
 * @see JsBaseEngineHelper::slider() for options list.
 */
        public function slider($options = array()) {
                $slider = $this->selection;
                $this->get($options['handle']);
                unset($options['handle']);

                if (isset($options['min']) && isset($options['max'])) {
                        $options['range'] = array($options['min'], $options['max']);
                        unset($options['min'], $options['max']);
                }
                $optionString = $this->_processOptions('slider', $options);
                if (!empty($optionString)) {
                        $optionString = ', {' . $optionString . '}';
                }
                $out = 'var jsSlider = new Slider(' . $slider . ', ' . $this->selection . $optionString . ');';
                $this->selection = $slider;
                return $out;
        }

/**
 * Serialize the form attached to $selector.
 *
 * @param array $options Array of options.
 * @return string Completed serializeForm() snippet
 * @see JsBaseEngineHelper::serializeForm()
 */
        public function serializeForm($options = array()) {
                $options = array_merge(array('isForm' => false, 'inline' => false), $options);
                $selection = $this->selection;
                if (!$options['isForm']) {
                        $selection = '$(' . $this->selection . '.form)';
                }
                $method = '.toQueryString()';
                if (!$options['inline']) {
                        $method .= ';';
                }
                return $selection . $method;
        }

}