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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

 * @since         CakePHP(tm) v 0.2.9

 * @license       http://www.opensource.org/licenses/mit-license.php MIT License

 */

App::uses('Router', 'Routing');

App::uses('Hash', 'Utility');

App::uses('Inflector', 'Utility');

/**

 * Abstract base class for all other Helpers in CakePHP.

 * Provides common methods and features.

 *

 * @package       Cake.View

 */

class Helper extends Object {

/**

 * Settings for this helper.

 *

 * @var array

 */

	public $settings = array();

/**

 * List of helpers used by this helper

 *

 * @var array

 */

	public $helpers = array();

/**

 * A helper lookup table used to lazy load helper objects.

 *

 * @var array

 */

	protected $_helperMap = array();

/**

 * The current theme name if any.

 *

 * @var string

 */

	public $theme = null;

/**

 * Request object

 *

 * @var CakeRequest

 */

	public $request = null;

/**

 * Plugin path

 *

 * @var string

 */

	public $plugin = null;

/**

 * Holds the fields array('field_name' => array('type' => 'string', 'length' => 100),

 * primaryKey and validates array('field_name')

 *

 * @var array

 */

	public $fieldset = array();

/**

 * Holds tag templates.

 *

 * @var array

 */

	public $tags = array();

/**

 * Holds the content to be cleaned.

 *

 * @var mixed

 */

	protected $_tainted = null;

/**

 * Holds the cleaned content.

 *

 * @var mixed

 */

	protected $_cleaned = null;

/**

 * The View instance this helper is attached to

 *

 * @var View

 */

	protected $_View;

/**

 * A list of strings that should be treated as suffixes, or

 * sub inputs for a parent input. This is used for date/time

 * inputs primarily.

 *

 * @var array

 */

	protected $_fieldSuffixes = array(

		'year', 'month', 'day', 'hour', 'min', 'second', 'meridian'

	);

/**

 * The name of the current model entities are in scope of.

 *

 * @see Helper::setEntity()

 * @var string

 */

	protected $_modelScope;

/**

 * The name of the current model association entities are in scope of.

 *

 * @see Helper::setEntity()

 * @var string

 */

	protected $_association;

/**

 * The dot separated list of elements the current field entity is for.

 *

 * @see Helper::setEntity()

 * @var string

 */

	protected $_entityPath;

/**

 * Minimized attributes

 *

 * @var array

 */

	protected $_minimizedAttributes = array(

		'compact', 'checked', 'declare', 'readonly', 'disabled', 'selected',

		'defer', 'ismap', 'nohref', 'noshade', 'nowrap', 'multiple', 'noresize',

		'autoplay', 'controls', 'loop', 'muted', 'required', 'novalidate', 'formnovalidate'

	);

/**

 * Format to attribute

 *

 * @var string

 */

	protected $_attributeFormat = '%s="%s"';

/**

 * Format to attribute

 *

 * @var string

 */

	protected $_minimizedAttributeFormat = '%s="%s"';

/**

 * Default Constructor

 *

 * @param View $View The View this helper is being attached to.

 * @param array $settings Configuration settings for the helper.

 */

	public function __construct(View $View, $settings = array()) {

		$this->_View = $View;

		$this->request = $View->request;

		if ($settings) {

			$this->settings = Hash::merge($this->settings, $settings);

		}

		if (!empty($this->helpers)) {

			$this->_helperMap = ObjectCollection::normalizeObjectArray($this->helpers);

		}

	}

/**

 * Provide non fatal errors on missing method calls.

 *

 * @param string $method Method to invoke

 * @param array $params Array of params for the method.

 * @return void

 */

	public function __call($method, $params) {

		trigger_error(__d('cake_dev', 'Method %1$s::%2$s does not exist', get_class($this), $method), E_USER_WARNING);

	}

/**

 * Lazy loads helpers. Provides access to deprecated request properties as well.

 *

 * @param string $name Name of the property being accessed.

 * @return mixed Helper or property found at $name

 * @deprecated 3.0.0 Accessing request properties through this method is deprecated and will be removed in 3.0.

 */

	public function __get($name) {

		if (isset($this->_helperMap[$name]) && !isset($this->{$name})) {

			$settings = array('enabled' => false) + (array)$this->_helperMap[$name]['settings'];

			$this->{$name} = $this->_View->loadHelper($this->_helperMap[$name]['class'], $settings);

		}

		if (isset($this->{$name})) {

			return $this->{$name};

		}

		switch ($name) {

			case 'base':

			case 'here':

			case 'webroot':

			case 'data':

				return $this->request->{$name};

			case 'action':

				return isset($this->request->params['action']) ? $this->request->params['action'] : '';

			case 'params':

				return $this->request;

		}

	}

/**

 * Provides backwards compatibility access for setting values to the request object.

 *

 * @param string $name Name of the property being accessed.

 * @param mixed $value Value to set.

 * @return void

 * @deprecated 3.0.0 This method will be removed in 3.0

 */

	public function __set($name, $value) {

		switch ($name) {

			case 'base':

			case 'here':

			case 'webroot':

			case 'data':

				$this->request->{$name} = $value;

				return;

			case 'action':

				$this->request->params['action'] = $value;

				return;

		}

		$this->{$name} = $value;

	}

/**

 * Finds URL for specified action.

 *

 * Returns a URL pointing at the provided parameters.

 *

 * @param string|array $url Either a relative string url like `/products/view/23` or

 *    an array of URL parameters. Using an array for URLs will allow you to leverage

 *    the reverse routing features of CakePHP.

 * @param bool $full If true, the full base URL will be prepended to the result

 * @return string Full translated URL with base path.

 * @link http://book.cakephp.org/2.0/en/views/helpers.html

 */

	public function url($url = null, $full = false) {

		return h(Router::url($url, $full));

	}

/**

 * Checks if a file exists when theme is used, if no file is found default location is returned

 *

 * @param string $file The file to create a webroot path to.

 * @return string Web accessible path to file.

 */

	public function webroot($file) {

		$asset = explode('?', $file);

		$asset[1] = isset($asset[1]) ? '?' . $asset[1] : null;

		$webPath = "{$this->request->webroot}" . $asset[0];

		$file = $asset[0];

		if (!empty($this->theme)) {

			$file = trim($file, '/');

			$theme = $this->theme . '/';

			if (DS === '\\') {

				$file = str_replace('/', '\\', $file);

			}

			if (file_exists(Configure::read('App.www_root') . 'theme' . DS . $this->theme . DS . $file)) {

				$webPath = "{$this->request->webroot}theme/" . $theme . $asset[0];

			} else {

				$themePath = App::themePath($this->theme);

				$path = $themePath . 'webroot' . DS . $file;

				if (file_exists($path)) {

					$webPath = "{$this->request->webroot}theme/" . $theme . $asset[0];

				}

			}

		}

		if (strpos($webPath, '//') !== false) {

			return str_replace('//', '/', $webPath . $asset[1]);

		}

		return $webPath . $asset[1];

	}

/**

 * Generate URL for given asset file. Depending on options passed provides full URL with domain name.

 * Also calls Helper::assetTimestamp() to add timestamp to local files

 *

 * @param string|array $path Path string or URL array

 * @param array $options Options array. Possible keys:

 *   `fullBase` Return full URL with domain name

 *   `pathPrefix` Path prefix for relative URLs

 *   `ext` Asset extension to append

 *   `plugin` False value will prevent parsing path as a plugin

 * @return string Generated URL

 */

	public function assetUrl($path, $options = array()) {

		if (is_array($path)) {

			return $this->url($path, !empty($options['fullBase']));

		}

		if (strpos($path, '://') !== false) {

			return $path;

		}

		if (!array_key_exists('plugin', $options) || $options['plugin'] !== false) {

			list($plugin, $path) = $this->_View->pluginSplit($path, false);

		}

		if (!empty($options['pathPrefix']) && $path[0] !== '/') {

			$path = $options['pathPrefix'] . $path;

		}

		if (!empty($options['ext']) &&

			strpos($path, '?') === false &&

			substr($path, -strlen($options['ext'])) !== $options['ext']

		) {

			$path .= $options['ext'];

		}

		if (preg_match('|^([a-z0-9]+:)?//|', $path)) {

			return $path;

		}

		if (isset($plugin)) {

			$path = Inflector::underscore($plugin) . '/' . $path;

		}

		$path = $this->_encodeUrl($this->assetTimestamp($this->webroot($path)));

		if (!empty($options['fullBase'])) {

			$path = rtrim(Router::fullBaseUrl(), '/') . '/' . ltrim($path, '/');

		}

		return $path;

	}

/**

 * Encodes a URL for use in HTML attributes.

 *

 * @param string $url The URL to encode.

 * @return string The URL encoded for both URL & HTML contexts.

 */

	protected function _encodeUrl($url) {

		$path = parse_url($url, PHP_URL_PATH);

		$parts = array_map('rawurldecode', explode('/', $path));

		$parts = array_map('rawurlencode', $parts);

		$encoded = implode('/', $parts);

		return h(str_replace($path, $encoded, $url));

	}

/**

 * Adds a timestamp to a file based resource based on the value of `Asset.timestamp` in

 * Configure. If Asset.timestamp is true and debug > 0, or Asset.timestamp === 'force'

 * a timestamp will be added.

 *

 * @param string $path The file path to timestamp, the path must be inside WWW_ROOT

 * @return string Path with a timestamp added, or not.

 */

	public function assetTimestamp($path) {

		$stamp = Configure::read('Asset.timestamp');

		$timestampEnabled = $stamp === 'force' || ($stamp === true && Configure::read('debug') > 0);

		if ($timestampEnabled && strpos($path, '?') === false) {

			$filepath = preg_replace(

				'/^' . preg_quote($this->request->webroot, '/') . '/',

				'',

				urldecode($path)

			);

			$webrootPath = WWW_ROOT . str_replace('/', DS, $filepath);

			if (file_exists($webrootPath)) {

				//@codingStandardsIgnoreStart

				return $path . '?' . @filemtime($webrootPath);

				//@codingStandardsIgnoreEnd

			}

			$segments = explode('/', ltrim($filepath, '/'));

			if ($segments[0] === 'theme') {

				$theme = $segments[1];

				unset($segments[0], $segments[1]);

				$themePath = App::themePath($theme) . 'webroot' . DS . implode(DS, $segments);

				//@codingStandardsIgnoreStart

				return $path . '?' . @filemtime($themePath);

				//@codingStandardsIgnoreEnd

			} else {

				$plugin = Inflector::camelize($segments[0]);

				if (CakePlugin::loaded($plugin)) {

					unset($segments[0]);

					$pluginPath = CakePlugin::path($plugin) . 'webroot' . DS . implode(DS, $segments);

					//@codingStandardsIgnoreStart

					return $path . '?' . @filemtime($pluginPath);

					//@codingStandardsIgnoreEnd

				}

			}

		}

		return $path;

	}

/**

 * Used to remove harmful tags from content. Removes a number of well known XSS attacks

 * from content. However, is not guaranteed to remove all possibilities. Escaping

 * content is the best way to prevent all possible attacks.

 *

 * @param string|array $output Either an array of strings to clean or a single string to clean.

 * @return string|array|null Cleaned content for output

 * @deprecated 3.0.0 This method will be removed in 3.0

 */

	public function clean($output) {

		$this->_reset();

		if (empty($output)) {

			return null;

		}

		if (is_array($output)) {

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

				$return[$key] = $this->clean($value);

			}

			return $return;

		}

		$this->_tainted = $output;

		$this->_clean();

		return $this->_cleaned;

	}

/**

 * Returns a space-delimited string with items of the $options array. If a key

 * of $options array happens to be one of those listed in `Helper::$_minimizedAttributes`

 *

 * And its value is one of:

 *

 * - '1' (string)

 * - 1 (integer)

 * - true (boolean)

 * - 'true' (string)

 *

 * Then the value will be reset to be identical with key's name.

 * If the value is not one of these 3, the parameter is not output.

 *

 * 'escape' is a special option in that it controls the conversion of

 *  attributes to their html-entity encoded equivalents. Set to false to disable html-encoding.

 *

 * If value for any option key is set to `null` or `false`, that option will be excluded from output.

 *

 * @param array $options Array of options.

 * @param array $exclude Array of options to be excluded, the options here will not be part of the return.

 * @param string $insertBefore String to be inserted before options.

 * @param string $insertAfter String to be inserted after options.

 * @return string Composed attributes.

 * @deprecated 3.0.0 This method will be moved to HtmlHelper in 3.0

 */

	protected function _parseAttributes($options, $exclude = null, $insertBefore = ' ', $insertAfter = null) {

		if (!is_string($options)) {

			$options = (array)$options + array('escape' => true);

			if (!is_array($exclude)) {

				$exclude = array();

			}

			$exclude = array('escape' => true) + array_flip($exclude);

			$escape = $options['escape'];

			$attributes = array();

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

				if (!isset($exclude[$key]) && $value !== false && $value !== null) {

					$attributes[] = $this->_formatAttribute($key, $value, $escape);

				}

			}

			$out = implode(' ', $attributes);

		} else {

			$out = $options;

		}

		return $out ? $insertBefore . $out . $insertAfter : '';

	}

/**

 * Formats an individual attribute, and returns the string value of the composed attribute.

 * Works with minimized attributes that have the same value as their name such as 'disabled' and 'checked'

 *

 * @param string $key The name of the attribute to create

 * @param string $value The value of the attribute to create.

 * @param bool $escape Define if the value must be escaped

 * @return string The composed attribute.

 * @deprecated 3.0.0 This method will be moved to HtmlHelper in 3.0

 */

	protected function _formatAttribute($key, $value, $escape = true) {

		if (is_array($value)) {

			$value = implode(' ', $value);

		}

		if (is_numeric($key)) {

			return sprintf($this->_minimizedAttributeFormat, $value, $value);

		}

		$truthy = array(1, '1', true, 'true', $key);

		$isMinimized = in_array($key, $this->_minimizedAttributes);

		if ($isMinimized && in_array($value, $truthy, true)) {

			return sprintf($this->_minimizedAttributeFormat, $key, $key);

		}

		if ($isMinimized) {

			return '';

		}

		return sprintf($this->_attributeFormat, $key, ($escape ? h($value) : $value));

	}

/**

 * Returns a string to be used as onclick handler for confirm dialogs.

 *

 * @param string $message Message to be displayed

 * @param string $okCode Code to be executed after user chose 'OK'

 * @param string $cancelCode Code to be executed after user chose 'Cancel'

 * @param array $options Array of options

 * @return string onclick JS code

 */

	protected function _confirm($message, $okCode, $cancelCode = '', $options = array()) {

		$message = json_encode($message);

		$confirm = "if (confirm({$message})) { {$okCode} } {$cancelCode}";

		if (isset($options['escape']) && $options['escape'] === false) {

			$confirm = h($confirm);

		}

		return $confirm;

	}

/**

 * Sets this helper's model and field properties to the dot-separated value-pair in $entity.

 *

 * @param string $entity A field name, like "ModelName.fieldName" or "ModelName.ID.fieldName"

 * @param bool $setScope Sets the view scope to the model specified in $tagValue

 * @return void

 */

	public function setEntity($entity, $setScope = false) {

		if ($entity === null) {

			$this->_modelScope = false;

		}

		if ($setScope === true) {

			$this->_modelScope = $entity;

		}

		$parts = array_values(Hash::filter(explode('.', $entity)));

		if (empty($parts)) {

			return;

		}

		$count = count($parts);

		$lastPart = isset($parts[$count - 1]) ? $parts[$count - 1] : null;

		// Either 'body' or 'date.month' type inputs.

		if (($count === 1 && $this->_modelScope && !$setScope) ||

			(

				$count === 2 &&

				in_array($lastPart, $this->_fieldSuffixes) &&

				$this->_modelScope &&

				$parts[0] !== $this->_modelScope

			)

		) {

			$entity = $this->_modelScope . '.' . $entity;

		}

		// 0.name, 0.created.month style inputs. Excludes inputs with the modelScope in them.

		if ($count >= 2 &&

			is_numeric($parts[0]) &&

			!is_numeric($parts[1]) &&

			$this->_modelScope &&

			strpos($entity, $this->_modelScope) === false

		) {

			$entity = $this->_modelScope . '.' . $entity;

		}

		$this->_association = null;

		$isHabtm = (

			isset($this->fieldset[$this->_modelScope]['fields'][$parts[0]]['type']) &&

			$this->fieldset[$this->_modelScope]['fields'][$parts[0]]['type'] === 'multiple'

		);

		// habtm models are special

		if ($count === 1 && $isHabtm) {

			$this->_association = $parts[0];

			$entity = $parts[0] . '.' . $parts[0];

		} else {

			// check for associated model.

			$reversed = array_reverse($parts);

			foreach ($reversed as $i => $part) {

				if ($i > 0 && preg_match('/^[A-Z]/', $part)) {

					$this->_association = $part;

					break;

				}

			}

		}

		$this->_entityPath = $entity;

	}

/**

 * Returns the entity reference of the current context as an array of identity parts

 *

 * @return array An array containing the identity elements of an entity

 */

	public function entity() {

		return explode('.', $this->_entityPath);

	}

/**

 * Gets the currently-used model of the rendering context.

 *

 * @return string

 */

	public function model() {

		if ($this->_association) {

			return $this->_association;

		}

		return $this->_modelScope;

	}

/**

 * Gets the currently-used model field of the rendering context.

 * Strips off field suffixes such as year, month, day, hour, min, meridian

 * when the current entity is longer than 2 elements.

 *

 * @return string

 */

	public function field() {

		$entity = $this->entity();

		$count = count($entity);

		$last = $entity[$count - 1];

		if ($count > 2 && in_array($last, $this->_fieldSuffixes)) {

			$last = isset($entity[$count - 2]) ? $entity[$count - 2] : null;

		}

		return $last;

	}

/**

 * Generates a DOM ID for the selected element, if one is not set.

 * Uses the current View::entity() settings to generate a CamelCased id attribute.

 *

 * @param array|string $options Either an array of html attributes to add $id into, or a string

 *   with a view entity path to get a domId for.

 * @param string $id The name of the 'id' attribute.

 * @return mixed If $options was an array, an array will be returned with $id set. If a string

 *   was supplied, a string will be returned.

 */

	public function domId($options = null, $id = 'id') {

		if (is_array($options) && array_key_exists($id, $options) && $options[$id] === null) {

			unset($options[$id]);

			return $options;

		} elseif (!is_array($options) && $options !== null) {

			$this->setEntity($options);

			return $this->domId();

		}

		$entity = $this->entity();

		$model = array_shift($entity);

		$dom = $model . implode('', array_map(array('Inflector', 'camelize'), $entity));

		if (is_array($options) && !array_key_exists($id, $options)) {

			$options[$id] = $dom;

		} elseif ($options === null) {

			return $dom;

		}

		return $options;

	}

/**

 * Gets the input field name for the current tag. Creates input name attributes

 * using CakePHP's data[Model][field] formatting.

 *

 * @param array|string $options If an array, should be an array of attributes that $key needs to be added to.

 *   If a string or null, will be used as the View entity.

 * @param string $field Field name.

 * @param string $key The name of the attribute to be set, defaults to 'name'

 * @return mixed If an array was given for $options, an array with $key set will be returned.

 *   If a string was supplied a string will be returned.

 */

	protected function _name($options = array(), $field = null, $key = 'name') {

		if ($options === null) {

			$options = array();

		} elseif (is_string($options)) {

			$field = $options;

			$options = 0;

		}

		if (!empty($field)) {

			$this->setEntity($field);

		}

		if (is_array($options) && array_key_exists($key, $options)) {

			return $options;

		}

		switch ($field) {

			case '_method':

				$name = $field;

				break;

			default:

				$name = 'data[' . implode('][', $this->entity()) . ']';

		}

		if (is_array($options)) {

			$options[$key] = $name;

			return $options;

		}

		return $name;

	}

/**

 * Gets the data for the current tag

 *

 * @param array|string $options If an array, should be an array of attributes that $key needs to be added to.

 *   If a string or null, will be used as the View entity.

 * @param string $field Field name.

 * @param string $key The name of the attribute to be set, defaults to 'value'

 * @return mixed If an array was given for $options, an array with $key set will be returned.

 *   If a string was supplied a string will be returned.

 */

	public function value($options = array(), $field = null, $key = 'value') {

		if ($options === null) {

			$options = array();

		} elseif (is_string($options)) {

			$field = $options;

			$options = 0;

		}

		if (is_array($options) && isset($options[$key])) {

			return $options;

		}

		if (!empty($field)) {

			$this->setEntity($field);

		}

		$result = null;

		$data = $this->request->data;

		$entity = $this->entity();

		if (!empty($data) && is_array($data) && !empty($entity)) {

			$result = Hash::get($data, implode('.', $entity));

		}

		$habtmKey = $this->field();

		if (empty($result) && isset($data[$habtmKey][$habtmKey]) && is_array($data[$habtmKey])) {

			$result = $data[$habtmKey][$habtmKey];

		} elseif (empty($result) && isset($data[$habtmKey]) && is_array($data[$habtmKey])) {

			if (ClassRegistry::isKeySet($habtmKey)) {

				$model = ClassRegistry::getObject($habtmKey);

				$result = $this->_selectedArray($data[$habtmKey], $model->primaryKey);

			}

		}

		if (is_array($options)) {

			if ($result === null && isset($options['default'])) {

				$result = $options['default'];

			}

			unset($options['default']);

		}

		if (is_array($options)) {

			$options[$key] = $result;

			return $options;

		}

		return $result;

	}

/**

 * Sets the defaults for an input tag. Will set the

 * name, value, and id attributes for an array of html attributes.

 *

 * @param string $field The field name to initialize.

 * @param array $options Array of options to use while initializing an input field.

 * @return array Array options for the form input.

 */

	protected function _initInputField($field, $options = array()) {

		if ($field !== null) {

			$this->setEntity($field);

		}

		$options = (array)$options;

		$options = $this->_name($options);

		$options = $this->value($options);

		$options = $this->domId($options);

		return $options;

	}

/**

 * Adds the given class to the element options

 *

 * @param array $options Array options/attributes to add a class to

 * @param string $class The class name being added.

 * @param string $key the key to use for class.

 * @return array Array of options with $key set.

 */

	public function addClass($options = array(), $class = null, $key = 'class') {

		if (isset($options[$key]) && trim($options[$key])) {

			$options[$key] .= ' ' . $class;

		} else {

			$options[$key] = $class;

		}

		return $options;

	}

/**

 * Returns a string generated by a helper method

 *

 * This method can be overridden in subclasses to do generalized output post-processing

 *

 * @param string $str String to be output.

 * @return string

 * @deprecated 3.0.0 This method will be removed in future versions.

 */

	public function output($str) {

		return $str;

	}

/**

 * Before render callback. beforeRender is called before the view file is rendered.

 *

 * Overridden in subclasses.

 *

 * @param string $viewFile The view file that is going to be rendered

 * @return void

 */

	public function beforeRender($viewFile) {

	}

/**

 * After render callback. afterRender is called after the view file is rendered

 * but before the layout has been rendered.

 *

 * Overridden in subclasses.

 *

 * @param string $viewFile The view file that was rendered.

 * @return void

 */

	public function afterRender($viewFile) {

	}

/**

 * Before layout callback. beforeLayout is called before the layout is rendered.

 *

 * Overridden in subclasses.

 *

 * @param string $layoutFile The layout about to be rendered.

 * @return void

 */

	public function beforeLayout($layoutFile) {

	}

/**

 * After layout callback. afterLayout is called after the layout has rendered.

 *

 * Overridden in subclasses.

 *

 * @param string $layoutFile The layout file that was rendered.

 * @return void

 */

	public function afterLayout($layoutFile) {

	}

/**

 * Before render file callback.

 * Called before any view fragment is rendered.

 *

 * Overridden in subclasses.

 *

 * @param string $viewFile The file about to be rendered.

 * @return void

 */

	public function beforeRenderFile($viewFile) {

	}

/**

 * After render file callback.

 * Called after any view fragment is rendered.

 *

 * Overridden in subclasses.

 *

 * @param string $viewFile The file just be rendered.

 * @param string $content The content that was rendered.

 * @return void

 */

	public function afterRenderFile($viewFile, $content) {

	}

/**

 * Transforms a recordset from a hasAndBelongsToMany association to a list of selected

 * options for a multiple select element

 *

 * @param string|array $data Data array or model name.

 * @param string $key Field name.

 * @return array

 */

	protected function _selectedArray($data, $key = 'id') {

		if (!is_array($data)) {

			$model = $data;

			if (!empty($this->request->data[$model][$model])) {

				return $this->request->data[$model][$model];

			}

			if (!empty($this->request->data[$model])) {

				$data = $this->request->data[$model];

			}

		}

		$array = array();

		if (!empty($data)) {

			foreach ($data as $row) {

				if (isset($row[$key])) {

					$array[$row[$key]] = $row[$key];

				}

			}

		}

		return empty($array) ? null : $array;

	}

/**

 * Resets the vars used by Helper::clean() to null

 *

 * @return void

 */

	protected function _reset() {

		$this->_tainted = null;

		$this->_cleaned = null;

	}

/**

 * Removes harmful content from output

 *

 * @return void

 */

	protected function _clean() {

		if (get_magic_quotes_gpc()) {

			$this->_cleaned = stripslashes($this->_tainted);

		} else {

			$this->_cleaned = $this->_tainted;

		}

		$this->_cleaned = str_replace(array("&", "<", ">"), array("&", "<", ">"), $this->_cleaned);

		$this->_cleaned = preg_replace('#(&\#*\w+)[\x00-\x20]+;#u', "$1;", $this->_cleaned);

		$this->_cleaned = preg_replace('#(&\#x*)([0-9A-F]+);*#iu', "$1$2;", $this->_cleaned);

		$this->_cleaned = html_entity_decode($this->_cleaned, ENT_COMPAT, "UTF-8");

		$this->_cleaned = preg_replace('#(<[^>]+[\x00-\x20\"\'\/])(on|xmlns)[^>]*>#iUu', "$1>", $this->_cleaned);

		$this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*)[\\x00-\x20]*j[\x00-\x20]*a[\x00-\x20]*v[\x00-\x20]*a[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iUu', '$1=$2nojavascript...', $this->_cleaned);

		$this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=([\'\"]*)[\x00-\x20]*v[\x00-\x20]*b[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iUu', '$1=$2novbscript...', $this->_cleaned);

		$this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=*([\'\"]*)[\x00-\x20]*-moz-binding[\x00-\x20]*:#iUu', '$1=$2nomozbinding...', $this->_cleaned);

		$this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=([\'\"]*)[\x00-\x20]*data[\x00-\x20]*:#Uu', '$1=$2nodata...', $this->_cleaned);

		$this->_cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*expression[\x00-\x20]*\([^>]*>#iU', "$1>", $this->_cleaned);

		$this->_cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*behaviour[\x00-\x20]*\([^>]*>#iU', "$1>", $this->_cleaned);

		$this->_cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:*[^>]*>#iUu', "$1>", $this->_cleaned);

		$this->_cleaned = preg_replace('#</*\w+:\w[^>]*>#i', "", $this->_cleaned);

		do {

			$oldstring = $this->_cleaned;

			$this->_cleaned = preg_replace('#</*(applet|meta|xml|blink|link|style|script|embed|object|iframe|frame|frameset|ilayer|layer|bgsound|title|base)[^>]*>#i', "", $this->_cleaned);

		} while ($oldstring !== $this->_cleaned);

		$this->_cleaned = str_replace(array("&", "<", ">"), array("&", "<", ">"), $this->_cleaned);

	}

}