FormHelper.php

<?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
 * @since         CakePHP(tm) v 0.10.0.1076
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\View\Helper;

use Cake\Core\Configure;
use Cake\Error;
use Cake\ORM\Entity;
use Cake\ORM\TableRegistry;
use Cake\Utility\Hash;
use Cake\Utility\Inflector;
use Cake\Utility\Security;
use Cake\View\Form\ArrayContext;
use Cake\View\Form\ContextInterface;
use Cake\View\Form\EntityContext;
use Cake\View\Form\NullContext;
use Cake\View\Helper;
use Cake\View\Helper\StringTemplateTrait;
use Cake\View\StringTemplate;
use Cake\View\View;
use Cake\View\Widget\InputRegistry;
use DateTime;
use Traversable;

/**
 * Form helper library.
 *
 * Automatic generation of HTML FORMs from given data.
 *
 * @property      HtmlHelper $Html
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html
 */
class FormHelper extends Helper {

	use StringTemplateTrait;

/**
 * Other helpers used by FormHelper
 *
 * @var array
 */
	public $helpers = array('Html');

/**
 * Options used by DateTime fields
 *
 * @var array
 */
	protected $_options = array(
		'day' => array(), 'minute' => array(), 'hour' => array(),
		'month' => array(), 'year' => array(), 'meridian' => array()
	);

/**
 * Settings for the helper.
 *
 * @var array
 */
	public $settings = [
		'errorClass' => 'form-error'
	];

/**
 * List of fields created, used with secure forms.
 *
 * @var array
 */
	public $fields = array();

/**
 * Constant used internally to skip the securing process,
 * and neither add the field to the hash or to the unlocked fields.
 *
 * @var string
 */
	const SECURE_SKIP = 'skip';

/**
 * Defines the type of form being created. Set by FormHelper::create().
 *
 * @var string
 */
	public $requestType = null;

/**
 * The default model being used for the current form.
 *
 * @var string
 */
	public $defaultModel = null;

/**
 * Persistent default options used by input(). Set by FormHelper::create().
 *
 * @var array
 */
	protected $_inputDefaults = array();

/**
 * An array of field names that have been excluded from
 * the Token hash used by SecurityComponent's validatePost method
 *
 * @see FormHelper::_secure()
 * @see SecurityComponent::validatePost()
 * @var array
 */
	protected $_unlockedFields = array();

/**
 * Holds the model references already loaded by this helper
 * product of trying to inspect them out of field names
 *
 * @var array
 */
	protected $_models = array();

/**
 * Holds all the validation errors for models loaded and inspected
 * it can also be set manually to be able to display custom error messages
 * in the any of the input fields generated by this helper
 *
 * @var array
 */
	public $validationErrors = array();

/**
 * Holds already used DOM ID suffixes to avoid collisions with multiple form field elements.
 *
 * @var array
 */
	protected $_domIdSuffixes = array();

/**
 * Registry for input widgets.
 *
 * @var Cake\View\Widget\InputRegistry
 */
	protected $_registry;

/**
 * Context for the current form.
 *
 * @var Cake\View\Form\Context
 */
	protected $_context;

/**
 * Context provider methods.
 *
 * @var array
 * @see addContextProvider
 */
	protected $_contextProviders;

/**
 * Default templates the FormHelper uses.
 *
 * @var array
 */
	protected $_defaultTemplates = [
		'formstart' => '<form{{attrs}}>',
		'formend' => '</form>',
		'hiddenblock' => '<div style="display:none;">{{content}}</div>',
		'input' => '<input type="{{type}}" name="{{name}}"{{attrs}}>',
	];

/**
 * Copies the validationErrors variable from the View object into this instance
 *
 * @param Cake\View\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()) {
		$settings += ['widgets' => [], 'templates' => null, 'registry' => null];
		parent::__construct($View, $settings);

		$this->initStringTemplates($this->_defaultTemplates);
		$this->inputRegistry($settings['registry'], $settings['widgets']);
		unset($this->settings['widgets'], $this->settings['registry']);

		$this->_addDefaultContextProviders();
	}

/**
 * Set the input registry the helper will use.
 *
 * @param Cake\View\Widget\InputRegistry $instance The registry instance to set.
 * @param array $widgets An array of widgets
 * @return Cake\View\Widget\InputRegistry
 */
	public function inputRegistry(InputRegistry $instance = null, $widgets = []) {
		if ($instance === null) {
			if ($this->_registry === null) {
				$this->_registry = new InputRegistry($this->_templater, $widgets);
			}
			return $this->_registry;
		}
		$this->_registry = $instance;
		return $this->_registry;
	}

/**
 * Add the default suite of context providers provided by CakePHP.
 *
 * @return void
 */
	protected function _addDefaultContextProviders() {
		$this->addContextProvider('array', function ($request, $data) {
			if (is_array($data['entity']) && isset($data['entity']['schema'])) {
				return new ArrayContext($request, $data['entity']);
			}
		});

		$this->addContextProvider('orm', function ($request, $data) {
			if (
				$data['entity'] instanceof Entity ||
				$data['entity'] instanceof Traversable ||
				(is_array($data['entity']) && !isset($data['entity']['schema']))
			) {
				return new EntityContext($request, $data);
			}
		});
	}

/**
 * Returns if a field is required to be filled based on validation properties from the validating object.
 *
 * @param Cake\Validation\ValidationSet $validationRules
 * @return boolean true if field is required to be filled, false otherwise
 */
	protected function _isRequiredField($validationRules) {
		if (empty($validationRules) || count($validationRules) === 0) {
			return false;
		}
		$validationRules->isUpdate($this->requestType === 'put');
		foreach ($validationRules as $rule) {
			if ($rule->skip()) {
				continue;
			}
			return !$validationRules->isEmptyAllowed();
		}
		return false;
	}

/**
 * Returns false if given form field described by the current entity has no errors.
 * Otherwise it returns the validation message
 *
 * @return mixed Either false when there are no errors, or an array of error
 *    strings. An error string could be ''.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::tagIsInvalid
 */
	public function tagIsInvalid() {
		$entity = $this->entity();
		$model = array_shift($entity);

		// 0.Model.field. Fudge entity path
		if (empty($model) || is_numeric($model)) {
			array_splice($entity, 1, 0, $model);
			$model = array_shift($entity);
		}
		return false;
	}

/**
 * Returns an HTML FORM element.
 *
 * ### Options:
 *
 * - `type` Form method defaults to autodetecting based on the form context. If
 *   the form context's isCreate() method returns false, a PUT request will be done.
 * - `action` The controller action the form submits to, (optional). Use this option if you
 *   don't need to change the controller from the current request's controller.
 * - `url` The URL the form submits to. Can be a string or a URL array. If you use 'url'
 *    you should leave 'action' undefined.
 * - `default` Allows for the creation of Ajax forms. Set this to false to prevent the default event handler.
 *   Will create an onsubmit attribute if it doesn't not exist. If it does, default action suppression
 *   will be appended.
 * - `onsubmit` Used in conjunction with 'default' to create ajax forms.
 * - `encoding` Set the accept-charset encoding for the form. Defaults to `Configure::read('App.encoding')`
 * - `context` Additional options for the context class. For example the EntityContext accepts a 'table'
 *   option that allows you to set the specific Table class the form should be based on.
 *
 * @param mixed $model The context for which the form is being defined. Can
 *   be an ORM entity, ORM resultset, or an array of meta data. You can use false or null
 *   to make a model-less form.
 * @param array $options An array of html attributes and options.
 * @return string An formatted opening FORM tag.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#options-for-create
 */
	public function create($model = null, $options = []) {
		$append = '';

		if (empty($options['context'])) {
			$options['context'] = [];
		}
		$options['context']['entity'] = $model;
		$this->_context = $this->_buildContext($options['context']);
		unset($options['context']);

		$isCreate = $this->_context->isCreate();

		$options = $options + [
			'type' => $isCreate ? 'post' : 'put',
			'action' => null,
			'url' => null,
			'default' => true,
			'encoding' => strtolower(Configure::read('App.encoding')),
		];

		$options['action'] = $this->_formUrl($options);
		unset($options['url']);

		switch (strtolower($options['type'])) {
			case 'get':
				$htmlAttributes['method'] = 'get';
				break;
			case 'file':
				$htmlAttributes['enctype'] = 'multipart/form-data';
				$options['type'] = ($isCreate) ? 'post' : 'put';
			case 'post':
			case 'put':
			case 'delete':
			case 'patch':
				$append .= $this->hidden('_method', array(
					'name' => '_method',
					'value' => strtoupper($options['type']),
					'id' => null,
					'secure' => static::SECURE_SKIP
				));
			default:
				$htmlAttributes['method'] = 'post';
		}
		$this->requestType = strtolower($options['type']);

		$htmlAttributes['action'] = $this->url($options['action']);

		if (!$options['default']) {
			if (!isset($options['onsubmit'])) {
				$options['onsubmit'] = '';
			}
			$htmlAttributes['onsubmit'] = $options['onsubmit'] . 'event.returnValue = false; return false;';
		}

		if (!empty($options['encoding'])) {
			$htmlAttributes['accept-charset'] = $options['encoding'];
		}
		unset($options['type'], $options['action'], $options['encoding'], $options['default']);

		$htmlAttributes = array_merge($options, $htmlAttributes);

		$this->fields = array();
		if ($this->requestType !== 'get') {
			$append .= $this->_csrfField();
		}

		if (!empty($append)) {
			$append = $this->formatTemplate('hiddenblock', ['content' => $append]);
		}
		return $this->formatTemplate('formstart', [
			'attrs' => $this->_templater->formatAttributes($htmlAttributes)
		]) . $append;
	}

/**
 * Create the URL for a form based on the options.
 *
 * @param array $options An array of options from create()
 * @return string The action attribute for the form.
 */
	protected function _formUrl($options) {
		if ($options['action'] === null && $options['url'] === null) {
			return $this->request->here(false);
		}
		if (empty($options['url']) || is_array($options['url'])) {
			if (isset($options['action']) && empty($options['url']['action'])) {
				$options['url']['action'] = $options['action'];
			}

			$plugin = $this->plugin ? Inflector::underscore($this->plugin) : null;
			$actionDefaults = [
				'plugin' => $plugin,
				'controller' => Inflector::underscore($this->request->params['controller']),
				'action' => $this->request->params['action'],
			];

			$action = (array)$options['url'] + $actionDefaults;

			$pk = $this->_context->primaryKey();
			if (count($pk)) {
				$id = $this->_context->val($pk[0]);
			}
			if (empty($action[0]) && isset($id)) {
				$action[0] = $id;
			}
			return $action;
		}
		if (is_string($options['url'])) {
			return $options['url'];
		}
	}

/**
 * Return a CSRF input if the request data is present.
 * Used to secure forms in conjunction with CsrfComponent &
 * SecurityComponent
 *
 * @return string
 */
	protected function _csrfField() {
		if (!empty($this->request['_Token']['unlockedFields'])) {
			foreach ((array)$this->request['_Token']['unlockedFields'] as $unlocked) {
				$this->_unlockedFields[] = $unlocked;
			}
		}
		if (empty($this->request->params['_csrfToken'])) {
			return '';
		}
		return $this->hidden('_csrfToken', array(
			'value' => $this->request->params['_csrfToken'],
			'id' => 'Token' . mt_rand(),
			'secure' => static::SECURE_SKIP
		));
	}

/**
 * Closes an HTML form, cleans up values set by FormHelper::create(), and writes hidden
 * input fields where appropriate.
 *
 * If $options is set a form submit button will be created. Options can be either a string or an array.
 *
 * {{{
 * array usage:
 *
 * array('label' => 'save'); value="save"
 * array('label' => 'save', 'name' => 'Whatever'); value="save" name="Whatever"
 * array('name' => 'Whatever'); value="Submit" name="Whatever"
 * array('label' => 'save', 'name' => 'Whatever', 'div' => 'good') <div class="good"> value="save" name="Whatever"
 * array('label' => 'save', 'name' => 'Whatever', 'div' => array('class' => 'good')); <div class="good"> value="save" name="Whatever"
 * }}}
 *
 * @param string|array $options as a string will use $options as the value of button,
 * @return string a closing FORM tag optional submit button.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#closing-the-form
 */
	public function end($options = null) {
		$out = null;
		$submit = null;

		if ($options !== null) {
			$submitOptions = array();
			if (is_string($options)) {
				$submit = $options;
			} else {
				if (isset($options['label'])) {
					$submit = $options['label'];
					unset($options['label']);
				}
				$submitOptions = $options;
			}
			$out .= $this->submit($submit, $submitOptions);
		}
		if (
			$this->requestType !== 'get' &&
			isset($this->request['_Token']) &&
			!empty($this->request['_Token'])
		) {
			$out .= $this->secure($this->fields);
			$this->fields = array();
		}
		$out .= $this->Html->useTag('formend');

		$this->requestType = null;
		$this->_context = null;
		return $out;
	}

/**
 * Generates a hidden field with a security hash based on the fields used in the form.
 *
 * @param array $fields The list of fields to use when generating the hash
 * @return string A hidden input field with a security hash
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::secure
 */
	public function secure($fields = array()) {
		if (!isset($this->request['_Token']) || empty($this->request['_Token'])) {
			return;
		}
		$locked = array();
		$unlockedFields = $this->_unlockedFields;

		foreach ($fields as $key => $value) {
			if (!is_int($key)) {
				$locked[$key] = $value;
				unset($fields[$key]);
			}
		}

		sort($unlockedFields, SORT_STRING);
		sort($fields, SORT_STRING);
		ksort($locked, SORT_STRING);
		$fields += $locked;

		$locked = implode(array_keys($locked), '|');
		$unlocked = implode($unlockedFields, '|');
		$fields = Security::hash(serialize($fields) . $unlocked . Configure::read('Security.salt'), 'sha1');

		$out = $this->hidden('_Token.fields', array(
			'value' => urlencode($fields . ':' . $locked),
			'id' => 'TokenFields' . mt_rand()
		));
		$out .= $this->hidden('_Token.unlocked', array(
			'value' => urlencode($unlocked),
			'id' => 'TokenUnlocked' . mt_rand()
		));
		return $this->Html->useTag('hiddenblock', $out);
	}

/**
 * Add to or get the list of fields that are currently unlocked.
 * Unlocked fields are not included in the field hash used by SecurityComponent
 * unlocking a field once its been added to the list of secured fields will remove
 * it from the list of fields.
 *
 * @param string $name The dot separated name for the field.
 * @return mixed Either null, or the list of fields.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::unlockField
 */
	public function unlockField($name = null) {
		if ($name === null) {
			return $this->_unlockedFields;
		}
		if (!in_array($name, $this->_unlockedFields)) {
			$this->_unlockedFields[] = $name;
		}
		$index = array_search($name, $this->fields);
		if ($index !== false) {
			unset($this->fields[$index]);
		}
		unset($this->fields[$name]);
	}

/**
 * Determine which fields of a form should be used for hash.
 * Populates $this->fields
 *
 * @param boolean $lock Whether this field should be part of the validation
 *     or excluded as part of the unlockedFields.
 * @param string $field Reference to field to be secured. Should be dot separated to indicate nesting.
 * @param mixed $value Field value, if value should not be tampered with.
 * @return mixed|null Not used yet
 */
	protected function _secure($lock, $field = null, $value = null) {
		if (!$field) {
			$field = $this->entity();
		} elseif (is_string($field)) {
			$field = Hash::filter(explode('.', $field));
		}

		foreach ($this->_unlockedFields as $unlockField) {
			$unlockParts = explode('.', $unlockField);
			if (array_values(array_intersect($field, $unlockParts)) === $unlockParts) {
				return;
			}
		}

		$field = implode('.', $field);
		$field = preg_replace('/(\.\d+)+$/', '', $field);

		if ($lock) {
			if (!in_array($field, $this->fields)) {
				if ($value !== null) {
					return $this->fields[$field] = $value;
				}
				$this->fields[] = $field;
			}
		} else {
			$this->unlockField($field);
		}
	}

/**
 * Returns true if there is an error for the given field, otherwise false
 *
 * @param string $field This should be "Modelname.fieldname"
 * @return boolean If there are errors this method returns true, else false.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::isFieldError
 */
	public function isFieldError($field) {
		$this->setEntity($field);
		return (bool)$this->tagIsInvalid();
	}

/**
 * Returns a formatted error message for given FORM field, NULL if no errors.
 *
 * ### Options:
 *
 * - `escape` boolean - Whether or not to html escape the contents of the error.
 * - `wrap` mixed - Whether or not the error message should be wrapped in a div. If a
 *   string, will be used as the HTML tag to use.
 * - `class` string - The class name for the error message
 *
 * @param string $field A field name, like "Modelname.fieldname"
 * @param string|array $text Error message as string or array of messages.
 *   If array contains `attributes` key it will be used as options for error container
 * @param array $options Rendering options for <div /> wrapper tag
 * @return string If there are errors this method returns an error message, otherwise null.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::error
 */
	public function error($field, $text = null, $options = array()) {
		$defaults = array('wrap' => true, 'class' => 'error-message', 'escape' => true);
		$options = array_merge($defaults, $options);
		$this->setEntity($field);

		$error = $this->tagIsInvalid();
		if ($error === false) {
			return null;
		}
		if (is_array($text)) {
			if (isset($text['attributes']) && is_array($text['attributes'])) {
				$options = array_merge($options, $text['attributes']);
				unset($text['attributes']);
			}
			$tmp = array();
			foreach ($error as &$e) {
				if (isset($text[$e])) {
					$tmp[] = $text[$e];
				} else {
					$tmp[] = $e;
				}
			}
			$text = $tmp;
		}

		if ($text !== null) {
			$error = $text;
		}
		if (is_array($error)) {
			foreach ($error as &$e) {
				if (is_numeric($e)) {
					$e = __d('cake', 'Error in field %s', Inflector::humanize($this->field()));
				}
			}
		}
		if ($options['escape']) {
			$error = h($error);
			unset($options['escape']);
		}
		if (is_array($error)) {
			if (count($error) > 1) {
				$listParams = array();
				if (isset($options['listOptions'])) {
					if (is_string($options['listOptions'])) {
						$listParams[] = $options['listOptions'];
					} else {
						if (isset($options['listOptions']['itemOptions'])) {
							$listParams[] = $options['listOptions']['itemOptions'];
							unset($options['listOptions']['itemOptions']);
						} else {
							$listParams[] = array();
						}
						if (isset($options['listOptions']['tag'])) {
							$listParams[] = $options['listOptions']['tag'];
							unset($options['listOptions']['tag']);
						}
						array_unshift($listParams, $options['listOptions']);
					}
					unset($options['listOptions']);
				}
				array_unshift($listParams, $error);
				$error = call_user_func_array(array($this->Html, 'nestedList'), $listParams);
			} else {
				$error = array_pop($error);
			}
		}
		if ($options['wrap']) {
			$tag = is_string($options['wrap']) ? $options['wrap'] : 'div';
			unset($options['wrap']);
			return $this->Html->tag($tag, $error, $options);
		}
		return $error;
	}

/**
 * Returns a formatted LABEL element for HTML FORMs. Will automatically generate
 * a `for` attribute if one is not provided.
 *
 * ### Options
 *
 * - `for` - Set the for attribute, if its not defined the for attribute
 *   will be generated from the $fieldName parameter using
 *   FormHelper::domId().
 *
 * Examples:
 *
 * The text and for attribute are generated off of the fieldname
 *
 * {{{
 * echo $this->Form->label('Post.published');
 * <label for="PostPublished">Published</label>
 * }}}
 *
 * Custom text:
 *
 * {{{
 * echo $this->Form->label('Post.published', 'Publish');
 * <label for="PostPublished">Publish</label>
 * }}}
 *
 * Custom class name:
 *
 * {{{
 * echo $this->Form->label('Post.published', 'Publish', 'required');
 * <label for="PostPublished" class="required">Publish</label>
 * }}}
 *
 * Custom attributes:
 *
 * {{{
 * echo $this->Form->label('Post.published', 'Publish', array(
 *		'for' => 'post-publish'
 * ));
 * <label for="post-publish">Publish</label>
 * }}}
 *
 * @param string $fieldName This should be "Modelname.fieldname"
 * @param string $text Text that will appear in the label field. If
 *   $text is left undefined the text will be inflected from the
 *   fieldName.
 * @param array|string $options An array of HTML attributes, or a string, to be used as a class name.
 * @return string The formatted LABEL element
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::label
 */
	public function label($fieldName = null, $text = null, $options = array()) {
		if ($fieldName === null) {
			$fieldName = implode('.', $this->entity());
		}

		if ($text === null) {
			if (strpos($fieldName, '.') !== false) {
				$fieldElements = explode('.', $fieldName);
				$text = array_pop($fieldElements);
			} else {
				$text = $fieldName;
			}
			if (substr($text, -3) === '_id') {
				$text = substr($text, 0, -3);
			}
			$text = __(Inflector::humanize(Inflector::underscore($text)));
		}

		if (is_string($options)) {
			$options = array('class' => $options);
		}

		if (isset($options['for'])) {
			$labelFor = $options['for'];
			unset($options['for']);
		} else {
			$labelFor = $this->domId($fieldName);
		}

		return $this->Html->useTag('label', $labelFor, $options, $text);
	}

/**
 * Generate a set of inputs for `$fields`. If $fields is null the fields of current model
 * will be used.
 *
 * You can customize individual inputs through `$fields`.
 * {{{
 *	$this->Form->inputs(array(
 *		'name' => array('label' => 'custom label')
 *	));
 * }}}
 *
 * In addition to controller fields output, `$fields` can be used to control legend
 * and fieldset rendering.
 * `$this->Form->inputs('My legend');` Would generate an input set with a custom legend.
 * Passing `fieldset` and `legend` key in `$fields` array has been deprecated since 2.3,
 * for more fine grained control use the `fieldset` and `legend` keys in `$options` param.
 *
 * @param array $fields An array of fields to generate inputs for, or null.
 * @param array $blacklist A simple array of fields to not create inputs for.
 * @param array $options Options array. Valid keys are:
 * - `fieldset` Set to false to disable the fieldset. If a string is supplied it will be used as
 *    the class name for the fieldset element.
 * - `legend` Set to false to disable the legend for the generated input set. Or supply a string
 *    to customize the legend text.
 * @return string Completed form inputs.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::inputs
 */
	public function inputs($fields = null, $blacklist = null, $options = array()) {
		$fieldset = $legend = true;
		$modelFields = array();
		$model = $this->model();
		if ($model) {
			$modelFields = array_keys((array)$this->_introspectModel($model, 'fields'));
		}
		if (is_array($fields)) {
			if (array_key_exists('legend', $fields) && !in_array('legend', $modelFields)) {
				$legend = $fields['legend'];
				unset($fields['legend']);
			}

			if (isset($fields['fieldset']) && !in_array('fieldset', $modelFields)) {
				$fieldset = $fields['fieldset'];
				unset($fields['fieldset']);
			}
		} elseif ($fields !== null) {
			$fieldset = $legend = $fields;
			if (!is_bool($fieldset)) {
				$fieldset = true;
			}
			$fields = array();
		}

		if (isset($options['legend'])) {
			$legend = $options['legend'];
		}
		if (isset($options['fieldset'])) {
			$fieldset = $options['fieldset'];
		}

		if (empty($fields)) {
			$fields = $modelFields;
		}

		if ($legend === true) {
			$actionName = __d('cake', 'New %s');
			$isEdit = (
				strpos($this->request->params['action'], 'update') !== false ||
				strpos($this->request->params['action'], 'edit') !== false
			);
			if ($isEdit) {
				$actionName = __d('cake', 'Edit %s');
			}
			$modelName = Inflector::humanize(Inflector::underscore($model));
			$legend = sprintf($actionName, __($modelName));
		}

		$out = null;
		foreach ($fields as $name => $options) {
			if (is_numeric($name) && !is_array($options)) {
				$name = $options;
				$options = array();
			}
			$entity = explode('.', $name);
			$blacklisted = (
				is_array($blacklist) &&
				(in_array($name, $blacklist) || in_array(end($entity), $blacklist))
			);
			if ($blacklisted) {
				continue;
			}
			$out .= $this->input($name, $options);
		}

		if (is_string($fieldset)) {
			$fieldsetClass = sprintf(' class="%s"', $fieldset);
		} else {
			$fieldsetClass = '';
		}

		if ($fieldset) {
			if ($legend) {
				$out = $this->Html->useTag('legend', $legend) . $out;
			}
			$out = $this->Html->useTag('fieldset', $fieldsetClass, $out);
		}
		return $out;
	}

/**
 * Generates a form input element complete with label and wrapper div
 *
 * ### Options
 *
 * See each field type method for more information. Any options that are part of
 * $attributes or $options for the different **type** methods can be included in `$options` for input().i
 * Additionally, any unknown keys that are not in the list below, or part of the selected type's options
 * will be treated as a regular html attribute for the generated input.
 *
 * - `type` - Force the type of widget you want. e.g. `type => 'select'`
 * - `label` - Either a string label, or an array of options for the label. See FormHelper::label().
 * - `div` - Either `false` to disable the div, or an array of options for the div.
 *	See HtmlHelper::div() for more options.
 * - `options` - For widgets that take options e.g. radio, select.
 * - `error` - Control the error message that is produced. Set to `false` to disable any kind of error reporting (field
 *    error and error messages).
 * - `errorMessage` - Boolean to control rendering error messages (field error will still occur).
 * - `empty` - String or boolean to enable empty select box options.
 * - `before` - Content to place before the label + input.
 * - `after` - Content to place after the label + input.
 * - `between` - Content to place between the label + input.
 * - `format` - Format template for element order. Any element that is not in the array, will not be in the output.
 *	- Default input format order: array('before', 'label', 'between', 'input', 'after', 'error')
 *	- Default checkbox format order: array('before', 'input', 'between', 'label', 'after', 'error')
 *	- Hidden input will not be formatted
 *	- Radio buttons cannot have the order of input and label elements controlled with these settings.
 *
 * @param string $fieldName This should be "Modelname.fieldname"
 * @param array $options Each type of input takes different options.
 * @return string Completed form widget.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#creating-form-elements
 */
	public function input($fieldName, $options = array()) {
		$this->setEntity($fieldName);
		$options = $this->_parseOptions($options);

		$divOptions = $this->_divOptions($options);
		unset($options['div']);

		if ($options['type'] === 'radio' && isset($options['options'])) {
			$radioOptions = (array)$options['options'];
			unset($options['options']);
		}

		$label = $this->_getLabel($fieldName, $options);
		if ($options['type'] !== 'radio') {
			unset($options['label']);
		}

		$error = $this->_extractOption('error', $options, null);
		unset($options['error']);

		$errorMessage = $this->_extractOption('errorMessage', $options, true);
		unset($options['errorMessage']);

		$selected = $this->_extractOption('selected', $options, null);
		unset($options['selected']);

		if ($options['type'] === 'datetime' || $options['type'] === 'date' || $options['type'] === 'time') {
			$dateFormat = $this->_extractOption('dateFormat', $options, 'MDY');
			$timeFormat = $this->_extractOption('timeFormat', $options, 12);
			unset($options['dateFormat'], $options['timeFormat']);
		}

		$type = $options['type'];
		$out = array('before' => $options['before'], 'label' => $label, 'between' => $options['between'], 'after' => $options['after']);
		$format = $this->_getFormat($options);

		unset($options['type'], $options['before'], $options['between'], $options['after'], $options['format']);

		$out['error'] = null;
		if ($type !== 'hidden' && $error !== false) {
			$errMsg = $this->error($fieldName, $error);
			if ($errMsg) {
				$divOptions = $this->addClass($divOptions, 'error');
				if ($errorMessage) {
					$out['error'] = $errMsg;
				}
			}
		}

		if ($type === 'radio' && isset($out['between'])) {
			$options['between'] = $out['between'];
			$out['between'] = null;
		}
		$out['input'] = $this->_getInput(compact('type', 'fieldName', 'options', 'radioOptions', 'selected', 'dateFormat', 'timeFormat'));

		$output = '';
		foreach ($format as $element) {
			$output .= $out[$element];
		}

		if (!empty($divOptions['tag'])) {
			$tag = $divOptions['tag'];
			unset($divOptions['tag']);
			$output = $this->Html->tag($tag, $output, $divOptions);
		}
		return $output;
	}

/**
 * Generates an input element
 *
 * @param array $args The options for the input element
 * @return string The generated input element
 */
	protected function _getInput($args) {
		extract($args);
		switch ($type) {
			case 'hidden':
				return $this->hidden($fieldName, $options);
			case 'checkbox':
				return $this->checkbox($fieldName, $options);
			case 'radio':
				return $this->radio($fieldName, $radioOptions, $options);
			case 'file':
				return $this->file($fieldName, $options);
			case 'select':
				$options += array('options' => array(), 'value' => $selected);
				$list = $options['options'];
				unset($options['options']);
				return $this->select($fieldName, $list, $options);
			case 'time':
				$options['value'] = $selected;
				return $this->dateTime($fieldName, null, $timeFormat, $options);
			case 'date':
				$options['value'] = $selected;
				return $this->dateTime($fieldName, $dateFormat, null, $options);
			case 'datetime':
				$options['value'] = $selected;
				return $this->dateTime($fieldName, $dateFormat, $timeFormat, $options);
			case 'textarea':
				return $this->textarea($fieldName, $options + array('cols' => '30', 'rows' => '6'));
			case 'url':
				return $this->text($fieldName, array('type' => 'url') + $options);
			default:
				return $this->{$type}($fieldName, $options);
		}
	}

/**
 * Generates input options array
 *
 * @param array $options
 * @return array Options
 */
	protected function _parseOptions($options) {
		$options = array_merge(
			array('before' => null, 'between' => null, 'after' => null, 'format' => null),
			$this->_inputDefaults,
			$options
		);

		if (!isset($options['type'])) {
			$options = $this->_magicOptions($options);
		}

		if (in_array($options['type'], array('radio', 'select'))) {
			$options = $this->_optionsOptions($options);
		}

		if (isset($options['rows']) || isset($options['cols'])) {
			$options['type'] = 'textarea';
		}

		if ($options['type'] === 'datetime' || $options['type'] === 'date' || $options['type'] === 'time' || $options['type'] === 'select') {
			$options += array('empty' => false);
		}
		return $options;
	}

/**
 * Generates list of options for multiple select
 *
 * @param array $options
 * @return array
 */
	protected function _optionsOptions($options) {
		if (isset($options['options'])) {
			return $options;
		}
		$varName = Inflector::variable(
			Inflector::pluralize(preg_replace('/_id$/', '', $this->field()))
		);
		$varOptions = $this->_View->get($varName);
		if (!is_array($varOptions)) {
			return $options;
		}
		if ($options['type'] !== 'radio') {
			$options['type'] = 'select';
		}
		$options['options'] = $varOptions;
		return $options;
	}

/**
 * Magically set option type and corresponding options
 *
 * @param array $options
 * @return array
 */
	protected function _magicOptions($options) {
		$modelKey = $this->model();
		$fieldKey = $this->field();
		$options['type'] = 'text';
		if (isset($options['options'])) {
			$options['type'] = 'select';
		} elseif (in_array($fieldKey, array('psword', 'passwd', 'password'))) {
			$options['type'] = 'password';
		} elseif (in_array($fieldKey, array('tel', 'telephone', 'phone'))) {
			$options['type'] = 'tel';
		} elseif ($fieldKey === 'email') {
			$options['type'] = 'email';
		} elseif (isset($options['checked'])) {
			$options['type'] = 'checkbox';
		} elseif ($fieldDef = $this->_introspectModel($modelKey, 'fields', $fieldKey)) {
			$type = $fieldDef['type'];
			$primaryKey = $this->fieldset[$modelKey]['key'];
			$map = array(
				'string' => 'text', 'datetime' => 'datetime',
				'boolean' => 'checkbox', 'timestamp' => 'datetime',
				'text' => 'textarea', 'time' => 'time',
				'date' => 'date', 'float' => 'number',
				'integer' => 'number', 'decimal' => 'number',
				'binary' => 'file'
			);

			if (isset($this->map[$type])) {
				$options['type'] = $this->map[$type];
			} elseif (isset($map[$type])) {
				$options['type'] = $map[$type];
			}
			if ($fieldKey == $primaryKey) {
				$options['type'] = 'hidden';
			}
			if (
				$options['type'] === 'number' &&
				!isset($options['step'])
			) {
				if ($type === 'decimal') {
					$decimalPlaces = substr($fieldDef['length'], strpos($fieldDef['length'], ',') + 1);
					$options['step'] = sprintf('%.' . $decimalPlaces . 'F', pow(10, -1 * $decimalPlaces));
				} elseif ($type === 'float') {
					$options['step'] = 'any';
				}
			}
		}

		if (preg_match('/_id$/', $fieldKey) && $options['type'] !== 'hidden') {
			$options['type'] = 'select';
		}

		if ($modelKey === $fieldKey) {
			$options['type'] = 'select';
			if (!isset($options['multiple'])) {
				$options['multiple'] = 'multiple';
			}
		}
		if (in_array($options['type'], array('text', 'number'))) {
			$options = $this->_optionsOptions($options);
		}
		if ($options['type'] === 'select' && array_key_exists('step', $options)) {
			unset($options['step']);
		}
		$options = $this->_maxLength($options);
		return $options;
	}

/**
 * Generate format options
 *
 * @param array $options
 * @return array
 */
	protected function _getFormat($options) {
		if ($options['type'] === 'hidden') {
			return array('input');
		}
		if (is_array($options['format']) && in_array('input', $options['format'])) {
			return $options['format'];
		}
		if ($options['type'] === 'checkbox') {
			return array('before', 'input', 'between', 'label', 'after', 'error');
		}
		return array('before', 'label', 'between', 'input', 'after', 'error');
	}

/**
 * Generate label for input
 *
 * @param string $fieldName
 * @param array $options
 * @return boolean|string false or Generated label element
 */
	protected function _getLabel($fieldName, $options) {
		if ($options['type'] === 'radio') {
			return false;
		}

		$label = null;
		if (isset($options['label'])) {
			$label = $options['label'];
		}

		if ($label === false) {
			return false;
		}
		return $this->_inputLabel($fieldName, $label, $options);
	}

/**
 * Calculates maxlength option
 *
 * @param array $options
 * @return array
 */
	protected function _maxLength($options) {
		$fieldDef = $this->_introspectModel($this->model(), 'fields', $this->field());
		$autoLength = (
			!array_key_exists('maxlength', $options) &&
			isset($fieldDef['length']) &&
			is_scalar($fieldDef['length']) &&
			$options['type'] !== 'select'
		);
		if ($autoLength &&
			in_array($options['type'], array('text', 'email', 'tel', 'url', 'search'))
		) {
			$options['maxlength'] = $fieldDef['length'];
		}
		return $options;
	}

/**
 * Generate div options for input
 *
 * @param array $options
 * @return array
 */
	protected function _divOptions($options) {
		if ($options['type'] === 'hidden') {
			return array();
		}
		$div = $this->_extractOption('div', $options, true);
		if (!$div) {
			return array();
		}

		$divOptions = array('class' => 'input');
		$divOptions = $this->addClass($divOptions, $options['type']);
		if (is_string($div)) {
			$divOptions['class'] = $div;
		} elseif (is_array($div)) {
			$divOptions = array_merge($divOptions, $div);
		}
		if (
			$this->_extractOption('required', $options) !== false &&
			$this->_introspectModel($this->model(), 'validates', $this->field())
		) {
			$divOptions = $this->addClass($divOptions, 'required');
		}
		if (!isset($divOptions['tag'])) {
			$divOptions['tag'] = 'div';
		}
		return $divOptions;
	}

/**
 * Extracts a single option from an options array.
 *
 * @param string $name The name of the option to pull out.
 * @param array $options The array of options you want to extract.
 * @param mixed $default The default option value
 * @return mixed the contents of the option or default
 */
	protected function _extractOption($name, $options, $default = null) {
		if (array_key_exists($name, $options)) {
			return $options[$name];
		}
		return $default;
	}

/**
 * Generate a label for an input() call.
 *
 * $options can contain a hash of id overrides. These overrides will be
 * used instead of the generated values if present.
 *
 * @param string $fieldName
 * @param string $label
 * @param array $options Options for the label element. 'NONE' option is deprecated and will be removed in 3.0
 * @return string Generated label element
 */
	protected function _inputLabel($fieldName, $label, $options) {
		$labelAttributes = $this->domId(array(), 'for');
		$idKey = null;
		if ($options['type'] === 'date' || $options['type'] === 'datetime') {
			$firstInput = 'M';
			if (
				array_key_exists('dateFormat', $options) &&
				($options['dateFormat'] === null || $options['dateFormat'] === 'NONE')
			) {
				$firstInput = 'H';
			} elseif (!empty($options['dateFormat'])) {
				$firstInput = substr($options['dateFormat'], 0, 1);
			}
			switch ($firstInput) {
				case 'D':
					$idKey = 'day';
					$labelAttributes['for'] .= 'Day';
					break;
				case 'Y':
					$idKey = 'year';
					$labelAttributes['for'] .= 'Year';
					break;
				case 'M':
					$idKey = 'month';
					$labelAttributes['for'] .= 'Month';
					break;
				case 'H':
					$idKey = 'hour';
					$labelAttributes['for'] .= 'Hour';
			}
		}
		if ($options['type'] === 'time') {
			$labelAttributes['for'] .= 'Hour';
			$idKey = 'hour';
		}
		if (isset($idKey) && isset($options['id']) && isset($options['id'][$idKey])) {
			$labelAttributes['for'] = $options['id'][$idKey];
		}

		if (is_array($label)) {
			$labelText = null;
			if (isset($label['text'])) {
				$labelText = $label['text'];
				unset($label['text']);
			}
			$labelAttributes = array_merge($labelAttributes, $label);
		} else {
			$labelText = $label;
		}

		if (isset($options['id']) && is_string($options['id'])) {
			$labelAttributes = array_merge($labelAttributes, array('for' => $options['id']));
		}
		return $this->label($fieldName, $labelText, $labelAttributes);
	}

/**
 * Creates a checkbox input widget.
 *
 * ### Options:
 *
 * - `value` - the value of the checkbox
 * - `checked` - boolean indicate that this checkbox is checked.
 * - `hiddenField` - boolean to indicate if you want the results of checkbox() to include
 *    a hidden input with a value of ''.
 * - `disabled` - create a disabled input.
 * - `default` - Set the default value for the checkbox. This allows you to start checkboxes
 *    as checked, without having to check the POST data. A matching POST data value, will overwrite
 *    the default value.
 *
 * @param string $fieldName Name of a field, like this "Modelname.fieldname"
 * @param array $options Array of HTML attributes.
 * @return string An HTML text input element.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#options-for-select-checkbox-and-radio-inputs
 */
	public function checkbox($fieldName, $options = array()) {
		$valueOptions = array();
		if (isset($options['default'])) {
			$valueOptions['default'] = $options['default'];
			unset($options['default']);
		}

		$options += array('value' => 1, 'required' => false);
		$options = $this->_initInputField($fieldName, $options) + array('hiddenField' => true);
		$value = current($this->value($valueOptions));
		$output = '';

		if (
			(!isset($options['checked']) && !empty($value) && $value == $options['value']) ||
			!empty($options['checked'])
		) {
			$options['checked'] = 'checked';
		}
		if ($options['hiddenField']) {
			$hiddenOptions = array(
				'id' => $options['id'] . '_',
				'name' => $options['name'],
				'value' => ($options['hiddenField'] !== true ? $options['hiddenField'] : '0'),
				'secure' => false
			);
			if (isset($options['disabled']) && $options['disabled']) {
				$hiddenOptions['disabled'] = 'disabled';
			}
			$output = $this->hidden($fieldName, $hiddenOptions);
		}
		unset($options['hiddenField']);

		return $output . $this->Html->useTag('checkbox', $options['name'], array_diff_key($options, array('name' => null)));
	}

/**
 * Creates a set of radio widgets. Will create a legend and fieldset
 * by default. Use $options to control this
 *
 * ### Attributes:
 *
 * - `separator` - define the string in between the radio buttons
 * - `between` - the string between legend and input set or array of strings to insert
 *    strings between each input block
 * - `legend` - control whether or not the widget set has a fieldset & legend
 * - `value` - indicate a value that is should be checked
 * - `label` - boolean to indicate whether or not labels for widgets show be displayed
 * - `hiddenField` - boolean to indicate if you want the results of radio() to include
 *    a hidden input with a value of ''. This is useful for creating radio sets that non-continuous
 * - `disabled` - Set to `true` or `disabled` to disable all the radio buttons.
 * - `empty` - Set to `true` to create a input with the value '' as the first option. When `true`
 *   the radio label will be 'empty'. Set this option to a string to control the label value.
 *
 * @param string $fieldName Name of a field, like this "Modelname.fieldname"
 * @param array $options Radio button options array.
 * @param array $attributes Array of HTML attributes, and special attributes above.
 * @return string Completed radio widget set.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#options-for-select-checkbox-and-radio-inputs
 */
	public function radio($fieldName, $options = array(), $attributes = array()) {
		$attributes = $this->_initInputField($fieldName, $attributes);

		$showEmpty = $this->_extractOption('empty', $attributes);
		if ($showEmpty) {
			$showEmpty = ($showEmpty === true) ? __d('cake', 'empty') : $showEmpty;
			$options = array('' => $showEmpty) + $options;
		}
		unset($attributes['empty']);

		$legend = false;
		if (isset($attributes['legend'])) {
			$legend = $attributes['legend'];
			unset($attributes['legend']);
		} elseif (count($options) > 1) {
			$legend = __(Inflector::humanize($this->field()));
		}

		$label = true;
		if (isset($attributes['label'])) {
			$label = $attributes['label'];
			unset($attributes['label']);
		}

		$separator = null;
		if (isset($attributes['separator'])) {
			$separator = $attributes['separator'];
			unset($attributes['separator']);
		}

		$between = null;
		if (isset($attributes['between'])) {
			$between = $attributes['between'];
			unset($attributes['between']);
		}

		$value = null;
		if (isset($attributes['value'])) {
			$value = $attributes['value'];
		} else {
			$value = $this->value($fieldName);
		}

		$disabled = array();
		if (isset($attributes['disabled'])) {
			$disabled = $attributes['disabled'];
		}

		$out = array();

		$hiddenField = isset($attributes['hiddenField']) ? $attributes['hiddenField'] : true;
		unset($attributes['hiddenField']);

		if (isset($value) && is_bool($value)) {
			$value = $value ? 1 : 0;
		}

		$this->_domIdSuffixes = array();
		foreach ($options as $optValue => $optTitle) {
			$optionsHere = array('value' => $optValue, 'disabled' => false);

			if (isset($value) && strval($optValue) === strval($value)) {
				$optionsHere['checked'] = 'checked';
			}
			$isNumeric = is_numeric($optValue);
			if ($disabled && (!is_array($disabled) || in_array((string)$optValue, $disabled, !$isNumeric))) {
				$optionsHere['disabled'] = true;
			}
			$tagName = $attributes['id'] . $this->domIdSuffix($optValue);

			if ($label) {
				$labelOpts = is_array($label) ? $label : array();
				$labelOpts += array('for' => $tagName);
				$optTitle = $this->label($tagName, $optTitle, $labelOpts);
			}

			if (is_array($between)) {
				$optTitle .= array_shift($between);
			}
			$allOptions = array_merge($attributes, $optionsHere);
			$out[] = $this->Html->useTag('radio', $attributes['name'], $tagName,
				array_diff_key($allOptions, array('name' => null, 'type' => null, 'id' => null)),
				$optTitle
			);
		}
		$hidden = null;

		if ($hiddenField) {
			if (!isset($value) || $value === '') {
				$hidden = $this->hidden($fieldName, array(
					'id' => $attributes['id'] . '_', 'value' => '', 'name' => $attributes['name']
				));
			}
		}
		$out = $hidden . implode($separator, $out);

		if (is_array($between)) {
			$between = '';
		}
		if ($legend) {
			$out = $this->Html->useTag('fieldset', '', $this->Html->useTag('legend', $legend) . $between . $out);
		}
		return $out;
	}

/**
 * Missing method handler - implements various simple input types. Is used to create inputs
 * of various types. e.g. `$this->Form->text();` will create `<input type="text" />` while
 * `$this->Form->range();` will create `<input type="range" />`
 *
 * ### Usage
 *
 * `$this->Form->search('User.query', array('value' => 'test'));`
 *
 * Will make an input like:
 *
 * `<input type="search" id="UserQuery" name="User[query]" value="test" />`
 *
 * The first argument to an input type should always be the fieldname, in `Model.field` format.
 * The second argument should always be an array of attributes for the input.
 *
 * @param string $method Method name / input type to make.
 * @param array $params Parameters for the method call
 * @return string Formatted input method.
 * @throws Cake\Error\Exception When there are no params for the method call.
 */
	public function __call($method, $params) {
		$options = array();
		if (empty($params)) {
			throw new Error\Exception(sprintf('Missing field name for FormHelper::%s', $method));
		}
		if (isset($params[1])) {
			$options = $params[1];
		}
		if (!isset($options['type'])) {
			$options['type'] = $method;
		}
		$options = $this->_initInputField($params[0], $options);
		return $this->Html->useTag('input', $options['name'], array_diff_key($options, array('name' => null)));
	}

/**
 * Creates a textarea widget.
 *
 * ### Options:
 *
 * - `escape` - Whether or not the contents of the textarea should be escaped. Defaults to true.
 *
 * @param string $fieldName Name of a field, in the form "Modelname.fieldname"
 * @param array $options Array of HTML attributes, and special options above.
 * @return string A generated HTML text input element
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::textarea
 */
	public function textarea($fieldName, $options = array()) {
		$options = $this->_initInputField($fieldName, $options);
		$value = null;

		if (array_key_exists('value', $options)) {
			$value = $options['value'];
			if (!array_key_exists('escape', $options) || $options['escape'] !== false) {
				$value = h($value);
			}
			unset($options['value']);
		}
		return $this->Html->useTag('textarea', $options['name'], array_diff_key($options, array('type' => null, 'name' => null)), $value);
	}

/**
 * Creates a hidden input field.
 *
 * @param string $fieldName Name of a field, in the form of "Modelname.fieldname"
 * @param array $options Array of HTML attributes.
 * @return string A generated hidden input
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::hidden
 */
	public function hidden($fieldName, $options = array()) {
		$options += array('required' => false, 'secure' => true);

		$secure = $options['secure'];
		unset($options['secure']);

		$options = $this->_initInputField($fieldName, array_merge(
			$options, array('secure' => static::SECURE_SKIP)
		));

		if ($secure === true) {
			$this->_secure(true, null, '' . $options['val']);
		}

		$options['type'] = 'hidden';
		return $this->widget('hidden', $options);
	}

/**
 * Creates file input widget.
 *
 * @param string $fieldName Name of a field, in the form "Modelname.fieldname"
 * @param array $options Array of HTML attributes.
 * @return string A generated file input.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::file
 */
	public function file($fieldName, $options = array()) {
		$options += array('secure' => true);
		$secure = $options['secure'];
		$options['secure'] = static::SECURE_SKIP;

		$options = $this->_initInputField($fieldName, $options);
		$field = $this->entity();

		foreach (array('name', 'type', 'tmp_name', 'error', 'size') as $suffix) {
			$this->_secure($secure, array_merge($field, array($suffix)));
		}

		$exclude = array('name' => null, 'value' => null);
		return $this->Html->useTag('file', $options['name'], array_diff_key($options, $exclude));
	}

/**
 * Creates a `<button>` tag. The type attribute defaults to `type="submit"`
 * You can change it to a different value by using `$options['type']`.
 *
 * ### Options:
 *
 * - `escape` - HTML entity encode the $title of the button. Defaults to false.
 *
 * @param string $title The button's caption. Not automatically HTML encoded
 * @param array $options Array of options and HTML attributes.
 * @return string A HTML button tag.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::button
 */
	public function button($title, $options = array()) {
		$options += array('type' => 'submit', 'escape' => false, 'secure' => false);
		if ($options['escape']) {
			$title = h($title);
		}
		if (isset($options['name'])) {
			$name = str_replace(array('[', ']'), array('.', ''), $options['name']);
			$this->_secure($options['secure'], $name);
		}
		return $this->Html->useTag('button', $options, $title);
	}

/**
 * Create a `<button>` tag with a surrounding `<form>` that submits via POST.
 *
 * This method creates a `<form>` element. So do not use this method in an already opened form.
 * Instead use FormHelper::submit() or FormHelper::button() to create buttons inside opened forms.
 *
 * ### Options:
 *
 * - `data` - Array with key/value to pass in input hidden
 * - Other options is the same of button method.
 *
 * @param string $title The button's caption. Not automatically HTML encoded
 * @param string|array $url URL as string or array
 * @param array $options Array of options and HTML attributes.
 * @return string A HTML button tag.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::postButton
 */
	public function postButton($title, $url, $options = array()) {
		$out = $this->create(false, array('id' => false, 'url' => $url));
		if (isset($options['data']) && is_array($options['data'])) {
			foreach ($options['data'] as $key => $value) {
				$out .= $this->hidden($key, array('value' => $value, 'id' => false));
			}
			unset($options['data']);
		}
		$out .= $this->button($title, $options);
		$out .= $this->end();
		return $out;
	}

/**
 * Creates an HTML link, but access the URL using the method you specify (defaults to POST).
 * Requires javascript to be enabled in browser.
 *
 * This method creates a `<form>` element. So do not use this method inside an existing form.
 * Instead you should add a submit button using FormHelper::submit()
 *
 * ### Options:
 *
 * - `data` - Array with key/value to pass in input hidden
 * - `method` - Request method to use. Set to 'delete' to simulate HTTP/1.1 DELETE request. Defaults to 'post'.
 * - `confirm` - Can be used instead of $confirmMessage.
 * - `inline` - Whether or not the associated form tag should be output inline.
 *   Set to false to have the form tag appended to the 'postLink' view block.
 *   Defaults to true.
 * - `block` - Choose a custom block to append the form tag to. Using this option
 *   will override the inline option.
 * - Other options are the same of HtmlHelper::link() method.
 * - The option `onclick` will be replaced.
 *
 * @param string $title The content to be wrapped by <a> tags.
 * @param string|array $url Cake-relative URL or array of URL parameters, or external URL (starts with http://)
 * @param array $options Array of HTML attributes.
 * @param boolean|string $confirmMessage JavaScript confirmation message.
 * @return string An `<a />` element.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::postLink
 */
	public function postLink($title, $url = null, $options = array(), $confirmMessage = false) {
		$options += array('inline' => true, 'block' => null);
		if (!$options['inline'] && empty($options['block'])) {
			$options['block'] = __FUNCTION__;
		}
		unset($options['inline']);

		$requestMethod = 'POST';
		if (!empty($options['method'])) {
			$requestMethod = strtoupper($options['method']);
			unset($options['method']);
		}
		if (!empty($options['confirm'])) {
			$confirmMessage = $options['confirm'];
			unset($options['confirm']);
		}

		$formName = str_replace('.', '', uniqid('post_', true));
		$formUrl = $this->url($url);
		$formOptions = array(
			'name' => $formName,
			'id' => $formName,
			'style' => 'display:none;',
			'method' => 'post',
		);
		if (isset($options['target'])) {
			$formOptions['target'] = $options['target'];
			unset($options['target']);
		}

		$out = $this->Html->useTag('form', $formUrl, $formOptions);
		$out .= $this->Html->useTag('hidden', '_method', array(
			'value' => $requestMethod
		));
		$out .= $this->_csrfField();

		$fields = array();
		if (isset($options['data']) && is_array($options['data'])) {
			foreach ($options['data'] as $key => $value) {
				$fields[$key] = $value;
				$out .= $this->hidden($key, array('value' => $value, 'id' => false));
			}
			unset($options['data']);
		}
		$out .= $this->secure($fields);
		$out .= $this->Html->useTag('formend');

		if ($options['block']) {
			$this->_View->append($options['block'], $out);
			$out = '';
		}
		unset($options['block']);

		$url = '#';
		$onClick = 'document.' . $formName . '.submit();';
		if ($confirmMessage) {
			$options['onclick'] = $this->_confirm($confirmMessage, $onClick, '', $options);
		} else {
			$options['onclick'] = $onClick . ' ';
		}
		$options['onclick'] .= 'event.returnValue = false; return false;';

		$out .= $this->Html->link($title, $url, $options);
		return $out;
	}

/**
 * Creates a submit button element. This method will generate `<input />` elements that
 * can be used to submit, and reset forms by using $options. image submits can be created by supplying an
 * image path for $caption.
 *
 * ### Options
 *
 * - `div` - Include a wrapping div?  Defaults to true. Accepts sub options similar to
 *   FormHelper::input().
 * - `before` - Content to include before the input.
 * - `after` - Content to include after the input.
 * - `type` - Set to 'reset' for reset inputs. Defaults to 'submit'
 * - Other attributes will be assigned to the input element.
 *
 * ### Options
 *
 * - `div` - Include a wrapping div?  Defaults to true. Accepts sub options similar to
 *   FormHelper::input().
 * - Other attributes will be assigned to the input element.
 *
 * @param string $caption The label appearing on the button OR if string contains :// or the
 *  extension .jpg, .jpe, .jpeg, .gif, .png use an image if the extension
 *  exists, AND the first character is /, image is relative to webroot,
 *  OR if the first character is not /, image is relative to webroot/img.
 * @param array $options Array of options. See above.
 * @return string A HTML submit button
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::submit
 */
	public function submit($caption = null, $options = array()) {
		if (!is_string($caption) && empty($caption)) {
			$caption = __d('cake', 'Submit');
		}
		$out = null;
		$div = true;

		if (isset($options['div'])) {
			$div = $options['div'];
			unset($options['div']);
		}
		$options += array('type' => 'submit', 'before' => null, 'after' => null, 'secure' => false);
		$divOptions = array('tag' => 'div');

		if ($div === true) {
			$divOptions['class'] = 'submit';
		} elseif ($div === false) {
			unset($divOptions);
		} elseif (is_string($div)) {
			$divOptions['class'] = $div;
		} elseif (is_array($div)) {
			$divOptions = array_merge(array('class' => 'submit', 'tag' => 'div'), $div);
		}

		if (isset($options['name'])) {
			$name = str_replace(array('[', ']'), array('.', ''), $options['name']);
			$this->_secure($options['secure'], $name);
		}
		unset($options['secure']);

		$before = $options['before'];
		$after = $options['after'];
		unset($options['before'], $options['after']);

		$isUrl = strpos($caption, '://') !== false;
		$isImage = preg_match('/\.(jpg|jpe|jpeg|gif|png|ico)$/', $caption);

		if ($isUrl || $isImage) {
			$unlockFields = array('x', 'y');
			if (isset($options['name'])) {
				$unlockFields = array(
					$options['name'] . '_x', $options['name'] . '_y'
				);
			}
			foreach ($unlockFields as $ignore) {
				$this->unlockField($ignore);
			}
		}

		if ($isUrl) {
			unset($options['type']);
			$tag = $this->Html->useTag('submitimage', $caption, $options);
		} elseif ($isImage) {
			unset($options['type']);
			if ($caption{0} !== '/') {
				$url = $this->webroot(Configure::read('App.imageBaseUrl') . $caption);
			} else {
				$url = $this->webroot(trim($caption, '/'));
			}
			$url = $this->assetTimestamp($url);
			$tag = $this->Html->useTag('submitimage', $url, $options);
		} else {
			$options['value'] = $caption;
			$tag = $this->Html->useTag('submit', $options);
		}
		$out = $before . $tag . $after;

		if (isset($divOptions)) {
			$tag = $divOptions['tag'];
			unset($divOptions['tag']);
			$out = $this->Html->tag($tag, $out, $divOptions);
		}
		return $out;
	}

/**
 * Returns a formatted SELECT element.
 *
 * ### Attributes:
 *
 * - `showParents` - If included in the array and set to true, an additional option element
 *   will be added for the parent of each option group. You can set an option with the same name
 *   and it's key will be used for the value of the option.
 * - `multiple` - show a multiple select box. If set to 'checkbox' multiple checkboxes will be
 *   created instead.
 * - `empty` - If true, the empty select option is shown. If a string,
 *   that string is displayed as the empty element.
 * - `escape` - If true contents of options will be HTML entity encoded. Defaults to true.
 * - `value` The selected value of the input.
 * - `class` - When using multiple = checkbox the class name to apply to the divs. Defaults to 'checkbox'.
 * - `disabled` - Control the disabled attribute. When creating a select box, set to true to disable the
 *   select box. When creating checkboxes, `true` will disable all checkboxes. You can also set disabled
 *   to a list of values you want to disable when creating checkboxes.
 *
 * ### Using options
 *
 * A simple array will create normal options:
 *
 * {{{
 * $options = array(1 => 'one', 2 => 'two);
 * $this->Form->select('Model.field', $options));
 * }}}
 *
 * While a nested options array will create optgroups with options inside them.
 * {{{
 * $options = array(
 *  1 => 'bill',
 *  'fred' => array(
 *     2 => 'fred',
 *     3 => 'fred jr.'
 *  )
 * );
 * $this->Form->select('Model.field', $options);
 * }}}
 *
 * In the above `2 => 'fred'` will not generate an option element. You should enable the `showParents`
 * attribute to show the fred option.
 *
 * If you have multiple options that need to have the same value attribute, you can
 * use an array of arrays to express this:
 *
 * {{{
 * $options = array(
 *  array('name' => 'United states', 'value' => 'USA'),
 *  array('name' => 'USA', 'value' => 'USA'),
 * );
 * }}}
 *
 * @param string $fieldName Name attribute of the SELECT
 * @param array $options Array of the OPTION elements (as 'value'=>'Text' pairs) to be used in the
 *	SELECT element
 * @param array $attributes The HTML attributes of the select element.
 * @return string Formatted SELECT element
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#options-for-select-checkbox-and-radio-inputs
 */
	public function select($fieldName, $options = array(), $attributes = array()) {
		$select = array();
		$style = null;
		$tag = null;
		$attributes += array(
			'class' => null,
			'escape' => true,
			'secure' => true,
			'empty' => '',
			'showParents' => false,
			'hiddenField' => true,
			'disabled' => false
		);

		$escapeOptions = $this->_extractOption('escape', $attributes);
		$secure = $this->_extractOption('secure', $attributes);
		$showEmpty = $this->_extractOption('empty', $attributes);
		$showParents = $this->_extractOption('showParents', $attributes);
		$hiddenField = $this->_extractOption('hiddenField', $attributes);
		unset($attributes['escape'], $attributes['secure'], $attributes['empty'], $attributes['showParents'], $attributes['hiddenField']);
		$id = $this->_extractOption('id', $attributes);

		$attributes = $this->_initInputField($fieldName, array_merge(
			(array)$attributes, array('secure' => static::SECURE_SKIP)
		));

		if (is_string($options) && isset($this->_options[$options])) {
			$options = $this->_generateOptions($options);
		} elseif (!is_array($options)) {
			$options = array();
		}
		if (isset($attributes['type'])) {
			unset($attributes['type']);
		}

		if (!empty($attributes['multiple'])) {
			$style = ($attributes['multiple'] === 'checkbox') ? 'checkbox' : null;
			$template = ($style) ? 'checkboxmultiplestart' : 'selectmultiplestart';
			$tag = $template;
			if ($hiddenField) {
				$hiddenAttributes = array(
					'value' => '',
					'id' => $attributes['id'] . ($style ? '' : '_'),
					'secure' => false,
					'name' => $attributes['name']
				);
				$select[] = $this->hidden(null, $hiddenAttributes);
			}
		} else {
			$tag = 'selectstart';
		}

		if ($tag === 'checkboxmultiplestart') {
			unset($attributes['required']);
		}

		if (!empty($tag) || isset($template)) {
			$hasOptions = (count($options) > 0 || $showEmpty);
			// Secure the field if there are options, or its a multi select.
			// Single selects with no options don't submit, but multiselects do.
			if (
				(!isset($secure) || $secure) &&
				empty($attributes['disabled']) &&
				(!empty($attributes['multiple']) || $hasOptions)
			) {
				$this->_secure(true, $this->_secureFieldName($attributes));
			}
			$select[] = $this->Html->useTag($tag, $attributes['name'], array_diff_key($attributes, array('name' => null, 'value' => null)));
		}
		$emptyMulti = (
			$showEmpty !== null && $showEmpty !== false && !(
				empty($showEmpty) && (isset($attributes) &&
				array_key_exists('multiple', $attributes))
			)
		);

		if ($emptyMulti) {
			$showEmpty = ($showEmpty === true) ? '' : $showEmpty;
			$options = array('' => $showEmpty) + $options;
		}

		if (!$id) {
			$attributes['id'] = Inflector::camelize($attributes['id']);
		}

		$select = array_merge($select, $this->_selectOptions(
			array_reverse($options, true),
			array(),
			$showParents,
			array(
				'escape' => $escapeOptions,
				'style' => $style,
				'name' => $attributes['name'],
				'value' => $attributes['value'],
				'class' => $attributes['class'],
				'id' => $attributes['id'],
				'disabled' => $attributes['disabled'],
			)
		));

		$template = ($style === 'checkbox') ? 'checkboxmultipleend' : 'selectend';
		$select[] = $this->Html->useTag($template);
		return implode("\n", $select);
	}

/**
 * Generates a valid DOM ID suffix from a string.
 * Also avoids collisions when multiple values are coverted to the same suffix by
 * appending a numeric value.
 *
 * For pre-HTML5 IDs only characters like a-z 0-9 - _ are valid. HTML5 doesn't have that
 * limitation, but to avoid layout issues it still filters out some sensitive chars.
 *
 * @param string $value The value that should be transferred into a DOM ID suffix.
 * @param string $type Doctype to use. Defaults to html4.
 * @return string DOM ID
 */
	public function domIdSuffix($value, $type = 'html4') {
		if ($type === 'html5') {
			$value = str_replace(array('@', '<', '>', ' ', '"', '\''), '_', $value);
		} else {
			$value = Inflector::camelize(Inflector::slug($value));
		}
		$value = Inflector::camelize($value);
		$count = 1;
		$suffix = $value;
		while (in_array($suffix, $this->_domIdSuffixes)) {
			$suffix = $value . $count++;
		}
		$this->_domIdSuffixes[] = $suffix;
		return $suffix;
	}

/**
 * Returns a SELECT element for days.
 *
 * ### Attributes:
 *
 * - `empty` - If true, the empty select option is shown. If a string,
 *   that string is displayed as the empty element.
 * - `value` The selected value of the input.
 *
 * @param string $fieldName Prefix name for the SELECT element
 * @param array $attributes HTML attributes for the select element
 * @return string A generated day select box.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::day
 */
	public function day($fieldName = null, $attributes = array()) {
		$attributes += array('empty' => true, 'value' => null);
		$attributes = $this->_dateTimeSelected('day', $fieldName, $attributes);

		if (strlen($attributes['value']) > 2) {
			$attributes['value'] = date_create($attributes['value'])->format('d');
		} elseif ($attributes['value'] === false) {
			$attributes['value'] = null;
		}
		return $this->select($fieldName . ".day", $this->_generateOptions('day'), $attributes);
	}

/**
 * Returns a SELECT element for years
 *
 * ### Attributes:
 *
 * - `empty` - If true, the empty select option is shown. If a string,
 *   that string is displayed as the empty element.
 * - `orderYear` - Ordering of year values in select options.
 *   Possible values 'asc', 'desc'. Default 'desc'
 * - `value` The selected value of the input.
 *
 * @param string $fieldName Prefix name for the SELECT element
 * @param integer $minYear First year in sequence
 * @param integer $maxYear Last year in sequence
 * @param array $attributes Attribute array for the select elements.
 * @return string Completed year select input
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::year
 */
	public function year($fieldName, $minYear = null, $maxYear = null, $attributes = array()) {
		$attributes += array('empty' => true, 'value' => null);
		if ((empty($attributes['value']) || $attributes['value'] === true) && $value = $this->value($fieldName)) {
			if (is_array($value)) {
				$year = null;
				extract($value);
				$attributes['value'] = $year;
			} else {
				if (empty($value)) {
					if (!$attributes['empty'] && !$maxYear) {
						$attributes['value'] = 'now';

					} elseif (!$attributes['empty'] && $maxYear && !$attributes['value']) {
						$attributes['value'] = $maxYear;
					}
				} else {
					$attributes['value'] = $value;
				}
			}
		}

		if (strlen($attributes['value']) > 4 || $attributes['value'] === 'now') {
			$attributes['value'] = date_create($attributes['value'])->format('Y');
		} elseif ($attributes['value'] === false) {
			$attributes['value'] = null;
		}
		$yearOptions = array('value' => $attributes['value'], 'min' => $minYear, 'max' => $maxYear, 'order' => 'desc');
		if (isset($attributes['orderYear'])) {
			$yearOptions['order'] = $attributes['orderYear'];
			unset($attributes['orderYear']);
		}
		return $this->select(
			$fieldName . '.year', $this->_generateOptions('year', $yearOptions),
			$attributes
		);
	}

/**
 * Returns a SELECT element for months.
 *
 * ### Attributes:
 *
 * - `monthNames` - If false, 2 digit numbers will be used instead of text.
 *   If a array, the given array will be used.
 * - `empty` - If true, the empty select option is shown. If a string,
 *   that string is displayed as the empty element.
 * - `value` The selected value of the input.
 *
 * @param string $fieldName Prefix name for the SELECT element
 * @param array $attributes Attributes for the select element
 * @return string A generated month select dropdown.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::month
 */
	public function month($fieldName, $attributes = array()) {
		$attributes += array('empty' => true, 'value' => null);
		$attributes = $this->_dateTimeSelected('month', $fieldName, $attributes);

		if (strlen($attributes['value']) > 2) {
			$attributes['value'] = date_create($attributes['value'])->format('m');
		} elseif ($attributes['value'] === false) {
			$attributes['value'] = null;
		}
		$defaults = array('monthNames' => true);
		$attributes = array_merge($defaults, (array)$attributes);
		$monthNames = $attributes['monthNames'];
		unset($attributes['monthNames']);

		return $this->select(
			$fieldName . ".month",
			$this->_generateOptions('month', array('monthNames' => $monthNames)),
			$attributes
		);
	}

/**
 * Returns a SELECT element for hours.
 *
 * ### Attributes:
 *
 * - `empty` - If true, the empty select option is shown. If a string,
 *   that string is displayed as the empty element.
 * - `value` The selected value of the input.
 *
 * @param string $fieldName Prefix name for the SELECT element
 * @param boolean $format24Hours True for 24 hours format
 * @param array $attributes List of HTML attributes
 * @return string Completed hour select input
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::hour
 */
	public function hour($fieldName, $format24Hours = false, $attributes = array()) {
		$attributes += array('empty' => true, 'value' => null);
		$attributes = $this->_dateTimeSelected('hour', $fieldName, $attributes);

		if (strlen($attributes['value']) > 2) {
			$Date = new DateTime($attributes['value']);
			if ($format24Hours) {
				$attributes['value'] = $Date->format('H');
			} else {
				$attributes['value'] = $Date->format('g');
			}
		} elseif ($attributes['value'] === false) {
			$attributes['value'] = null;
		}

		if ($attributes['value'] > 12 && !$format24Hours) {
			$attributes['value'] -= 12;
		}
		if (($attributes['value'] === 0 || $attributes['value'] === '00') && !$format24Hours) {
			$attributes['value'] = 12;
		}

		return $this->select(
			$fieldName . ".hour",
			$this->_generateOptions($format24Hours ? 'hour24' : 'hour'),
			$attributes
		);
	}

/**
 * Returns a SELECT element for minutes.
 *
 * ### Attributes:
 *
 * - `empty` - If true, the empty select option is shown. If a string,
 *   that string is displayed as the empty element.
 * - `value` The selected value of the input.
 *
 * @param string $fieldName Prefix name for the SELECT element
 * @param array $attributes Array of Attributes
 * @return string Completed minute select input.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::minute
 */
	public function minute($fieldName, $attributes = array()) {
		$attributes += array('empty' => true, 'value' => null);
		$attributes = $this->_dateTimeSelected('min', $fieldName, $attributes);

		if (strlen($attributes['value']) > 2) {
			$attributes['value'] = date_create($attributes['value'])->format('i');
		} elseif ($attributes['value'] === false) {
			$attributes['value'] = null;
		}
		$minuteOptions = array();

		if (isset($attributes['interval'])) {
			$minuteOptions['interval'] = $attributes['interval'];
			unset($attributes['interval']);
		}
		return $this->select(
			$fieldName . ".min", $this->_generateOptions('minute', $minuteOptions),
			$attributes
		);
	}

/**
 * Selects values for dateTime selects.
 *
 * @param string $select Name of element field. ex. 'day'
 * @param string $fieldName Name of fieldName being generated ex. Model.created
 * @param array $attributes Array of attributes, must contain 'empty' key.
 * @return array Attributes array with currently selected value.
 */
	protected function _dateTimeSelected($select, $fieldName, $attributes) {
		if ((empty($attributes['value']) || $attributes['value'] === true) && $value = $this->value($fieldName)) {
			if (is_array($value)) {
				$attributes['value'] = isset($value[$select]) ? $value[$select] : null;
			} else {
				if (empty($value)) {
					if (!$attributes['empty']) {
						$attributes['value'] = 'now';
					}
				} else {
					$attributes['value'] = $value;
				}
			}
		}
		return $attributes;
	}

/**
 * Returns a SELECT element for AM or PM.
 *
 * ### Attributes:
 *
 * - `empty` - If true, the empty select option is shown. If a string,
 *   that string is displayed as the empty element.
 * - `value` The selected value of the input.
 *
 * @param string $fieldName Prefix name for the SELECT element
 * @param array|string $attributes Array of Attributes
 * @return string Completed meridian select input
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::meridian
 */
	public function meridian($fieldName, $attributes = array()) {
		$attributes += array('empty' => true, 'value' => null);
		if ((empty($attributes['value']) || $attributes['value'] === true) && $value = $this->value($fieldName)) {
			if (is_array($value)) {
				$meridian = null;
				extract($value);
				$attributes['value'] = $meridian;
			} else {
				if (empty($value)) {
					if (!$attributes['empty']) {
						$attributes['value'] = date('a');
					}
				} else {
					$attributes['value'] = date_create($attributes['value'])->format('a');
				}
			}
		}

		if ($attributes['value'] === false) {
			$attributes['value'] = null;
		}
		return $this->select(
			$fieldName . ".meridian", $this->_generateOptions('meridian'),
			$attributes
		);
	}

/**
 * Returns a set of SELECT elements for a full datetime setup: day, month and year, and then time.
 *
 * ### Attributes:
 *
 * - `monthNames` If false, 2 digit numbers will be used instead of text.
 *   If a array, the given array will be used.
 * - `minYear` The lowest year to use in the year select
 * - `maxYear` The maximum year to use in the year select
 * - `interval` The interval for the minutes select. Defaults to 1
 * - `separator` The contents of the string between select elements. Defaults to '-'
 * - `empty` - If true, the empty select option is shown. If a string,
 *   that string is displayed as the empty element.
 * - `round` - Set to `up` or `down` if you want to force rounding in either direction. Defaults to null.
 * - `value` | `default` The default value to be used by the input. A value in `$this->data`
 *   matching the field name will override this value. If no default is provided `time()` will be used.
 *
 * @param string $fieldName Prefix name for the SELECT element
 * @param string $dateFormat DMY, MDY, YMD, or null to not generate date inputs.
 * @param string $timeFormat 12, 24, or null to not generate time inputs.
 * @param array|string $attributes array of Attributes
 * @return string Generated set of select boxes for the date and time formats chosen.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::dateTime
 */
	public function dateTime($fieldName, $dateFormat = 'DMY', $timeFormat = '12', $attributes = array()) {
		$attributes += array('empty' => true, 'value' => null);
		$year = $month = $day = $hour = $min = $meridian = null;

		if (empty($attributes['value'])) {
			$attributes = $this->value($attributes, $fieldName);
		}

		if ($attributes['value'] === null && $attributes['empty'] != true) {
			$attributes['value'] = time();
			if (!empty($attributes['maxYear']) && $attributes['maxYear'] < date('Y')) {
				$attributes['value'] = strtotime(date($attributes['maxYear'] . '-m-d'));
			}
		}

		if (!empty($attributes['value'])) {
			list($year, $month, $day, $hour, $min, $meridian) = $this->_getDateTimeValue(
				$attributes['value'],
				$timeFormat
			);
		}

		$defaults = array(
			'minYear' => null, 'maxYear' => null, 'separator' => '-',
			'interval' => 1, 'monthNames' => true, 'round' => null
		);
		$attributes = array_merge($defaults, (array)$attributes);
		if (isset($attributes['minuteInterval'])) {
			$attributes['interval'] = $attributes['minuteInterval'];
			unset($attributes['minuteInterval']);
		}
		$minYear = $attributes['minYear'];
		$maxYear = $attributes['maxYear'];
		$separator = $attributes['separator'];
		$interval = $attributes['interval'];
		$monthNames = $attributes['monthNames'];
		$round = $attributes['round'];
		$attributes = array_diff_key($attributes, $defaults);

		if (!empty($interval) && $interval > 1 && !empty($min)) {
			$current = new \DateTime();
			if ($year !== null) {
				$current->setDate($year, $month, $day);
			}
			if ($hour !== null) {
				$current->setTime($hour, $min);
			}
			$changeValue = $min * (1 / $interval);
			switch ($round) {
				case 'up':
					$changeValue = ceil($changeValue);
					break;
				case 'down':
					$changeValue = floor($changeValue);
					break;
				default:
					$changeValue = round($changeValue);
			}
			$change = ($changeValue * $interval) - $min;
			$current->modify($change > 0 ? "+$change minutes" : "$change minutes");
			$format = ($timeFormat == 12) ? 'Y m d h i a' : 'Y m d H i a';
			$newTime = explode(' ', $current->format($format));
			list($year, $month, $day, $hour, $min, $meridian) = $newTime;
		}

		$keys = array('Day', 'Month', 'Year', 'Hour', 'Minute', 'Meridian');
		$attrs = array_fill_keys($keys, $attributes);

		$hasId = isset($attributes['id']);
		if ($hasId && is_array($attributes['id'])) {
			// check for missing ones and build selectAttr for each element
			$attributes['id'] += array(
				'month' => '',
				'year' => '',
				'day' => '',
				'hour' => '',
				'minute' => '',
				'meridian' => ''
			);
			foreach ($keys as $key) {
				$attrs[$key]['id'] = $attributes['id'][strtolower($key)];
			}
		}
		if ($hasId && is_string($attributes['id'])) {
			// build out an array version
			foreach ($keys as $key) {
				$attrs[$key]['id'] = $attributes['id'] . $key;
			}
		}

		if (is_array($attributes['empty'])) {
			$attributes['empty'] += array(
				'month' => true,
				'year' => true,
				'day' => true,
				'hour' => true,
				'minute' => true,
				'meridian' => true
			);
			foreach ($keys as $key) {
				$attrs[$key]['empty'] = $attributes['empty'][strtolower($key)];
			}
		}

		$selects = array();
		foreach (preg_split('//', $dateFormat, -1, PREG_SPLIT_NO_EMPTY) as $char) {
			switch ($char) {
				case 'Y':
					$attrs['Year']['value'] = $year;
					$selects[] = $this->year(
						$fieldName, $minYear, $maxYear, $attrs['Year']
					);
					break;
				case 'M':
					$attrs['Month']['value'] = $month;
					$attrs['Month']['monthNames'] = $monthNames;
					$selects[] = $this->month($fieldName, $attrs['Month']);
					break;
				case 'D':
					$attrs['Day']['value'] = $day;
					$selects[] = $this->day($fieldName, $attrs['Day']);
					break;
			}
		}
		$opt = implode($separator, $selects);

		$attrs['Minute']['interval'] = $interval;
		switch ($timeFormat) {
			case '24':
				$attrs['Hour']['value'] = $hour;
				$attrs['Minute']['value'] = $min;
				$opt .= $this->hour($fieldName, true, $attrs['Hour']) . ':' .
				$this->minute($fieldName, $attrs['Minute']);
				break;
			case '12':
				$attrs['Hour']['value'] = $hour;
				$attrs['Minute']['value'] = $min;
				$attrs['Meridian']['value'] = $meridian;
				$opt .= $this->hour($fieldName, false, $attrs['Hour']) . ':' .
				$this->minute($fieldName, $attrs['Minute']) . ' ' .
				$this->meridian($fieldName, $attrs['Meridian']);
				break;
		}
		return $opt;
	}

/**
 * Parse the value for a datetime selected value
 *
 * @param string|array $value The selected value.
 * @param integer $timeFormat The time format
 * @return array Array of selected value.
 */
	protected function _getDateTimeValue($value, $timeFormat) {
		$year = $month = $day = $hour = $min = $meridian = null;
		if (is_array($value)) {
			extract($value);
			if ($meridian === 'pm') {
				$hour += 12;
			}
			return array($year, $month, $day, $hour, $min, $meridian);
		}

		if (is_numeric($value)) {
			$value = strftime('%Y-%m-%d %H:%M:%S', $value);
		}
		$meridian = 'am';
		$pos = strpos($value, '-');
		if ($pos !== false) {
			$date = explode('-', $value);
			$days = explode(' ', $date[2]);
			$day = $days[0];
			$month = $date[1];
			$year = $date[0];
		} else {
			$days[1] = $value;
		}

		if (!empty($timeFormat)) {
			$time = explode(':', $days[1]);

			if ($time[0] >= 12) {
				$meridian = 'pm';
			}
			$hour = $min = null;
			if (isset($time[1])) {
				$hour = $time[0];
				$min = $time[1];
			}
		}
		return array($year, $month, $day, $hour, $min, $meridian);
	}

/**
 * Gets the input field name for the current tag
 *
 * @param array $options
 * @param string $field
 * @param string $key
 * @return array
 */
	protected function _name($options = array(), $field = null, $key = 'name') {
		if ($this->requestType === 'get') {
			if ($options === null) {
				$options = array();
			} elseif (is_string($options)) {
				$field = $options;
				$options = 0;
			}

			if (!empty($field)) {
				$this->setEntity($field);
			}

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

			$entity = $this->entity();
			$model = $this->model();
			$name = $model === $entity[0] && isset($entity[1]) ? $entity[1] : $entity[0];
			$last = $entity[count($entity) - 1];
			if (in_array($last, $this->_fieldSuffixes)) {
				$name .= '[' . $last . ']';
			}

			if (is_array($options)) {
				$options[$key] = $name;
				return $options;
			}
			return $name;
		}
		return parent::_name($options, $field, $key);
	}

/**
 * Returns an array of formatted OPTION/OPTGROUP elements
 *
 * @param array $elements
 * @param array $parents
 * @param boolean $showParents
 * @param array $attributes
 * @return array
 */
	protected function _selectOptions($elements = array(), $parents = array(), $showParents = null, $attributes = array()) {
		$select = array();
		$attributes = array_merge(
			array('escape' => true, 'style' => null, 'value' => null, 'class' => null),
			$attributes
		);
		$selectedIsEmpty = ($attributes['value'] === '' || $attributes['value'] === null);
		$selectedIsArray = is_array($attributes['value']);

		$this->_domIdSuffixes = array();
		foreach ($elements as $name => $title) {
			$htmlOptions = array();
			if (is_array($title) && (!isset($title['name']) || !isset($title['value']))) {
				if (!empty($name)) {
					if ($attributes['style'] === 'checkbox') {
						$select[] = $this->Html->useTag('fieldsetend');
					} else {
						$select[] = $this->Html->useTag('optiongroupend');
					}
					$parents[] = $name;
				}
				$select = array_merge($select, $this->_selectOptions(
					$title, $parents, $showParents, $attributes
				));

				if (!empty($name)) {
					$name = $attributes['escape'] ? h($name) : $name;
					if ($attributes['style'] === 'checkbox') {
						$select[] = $this->Html->useTag('fieldsetstart', $name);
					} else {
						$select[] = $this->Html->useTag('optiongroup', $name, '');
					}
				}
				$name = null;
			} elseif (is_array($title)) {
				$htmlOptions = $title;
				$name = $title['value'];
				$title = $title['name'];
				unset($htmlOptions['name'], $htmlOptions['value']);
			}

			if ($name !== null) {
				$isNumeric = is_numeric($name);
				if (
					(!$selectedIsArray && !$selectedIsEmpty && (string)$attributes['value'] == (string)$name) ||
					($selectedIsArray && in_array((string)$name, $attributes['value'], !$isNumeric))
				) {
					if ($attributes['style'] === 'checkbox') {
						$htmlOptions['checked'] = true;
					} else {
						$htmlOptions['selected'] = 'selected';
					}
				}

				if ($showParents || (!in_array($title, $parents))) {
					$title = ($attributes['escape']) ? h($title) : $title;

					$hasDisabled = !empty($attributes['disabled']);
					if ($hasDisabled) {
						$disabledIsArray = is_array($attributes['disabled']);
						if ($disabledIsArray) {
							$disabledIsNumeric = is_numeric($name);
						}
					}
					if (
						$hasDisabled &&
						$disabledIsArray &&
						in_array((string)$name, $attributes['disabled'], !$disabledIsNumeric)
					) {
						$htmlOptions['disabled'] = 'disabled';
					}
					if ($hasDisabled && !$disabledIsArray && $attributes['style'] === 'checkbox') {
						$htmlOptions['disabled'] = $attributes['disabled'] === true ? 'disabled' : $attributes['disabled'];
					}

					if ($attributes['style'] === 'checkbox') {
						$htmlOptions['value'] = $name;

						$tagName = $attributes['id'] . $this->domIdSuffix($name);
						$htmlOptions['id'] = $tagName;
						$label = array('for' => $tagName);

						if (isset($htmlOptions['checked']) && $htmlOptions['checked'] === true) {
							$label['class'] = 'selected';
						}

						$name = $attributes['name'];

						if (empty($attributes['class'])) {
							$attributes['class'] = 'checkbox';
						} elseif ($attributes['class'] === 'form-error') {
							$attributes['class'] = 'checkbox ' . $attributes['class'];
						}
						$label = $this->label(null, $title, $label);
						$item = $this->Html->useTag('checkboxmultiple', $name, $htmlOptions);
						$select[] = $this->Html->div($attributes['class'], $item . $label);
					} else {
						if ($attributes['escape']) {
							$name = h($name);
						}
						$select[] = $this->Html->useTag('selectoption', $name, $htmlOptions, $title);
					}
				}
			}
		}

		return array_reverse($select, true);
	}

/**
 * Generates option lists for common <select /> menus
 *
 * @param string $name
 * @param array $options
 * @return array
 */
	protected function _generateOptions($name, $options = array()) {
		if (!empty($this->options[$name])) {
			return $this->options[$name];
		}
		$data = array();

		switch ($name) {
			case 'minute':
				if (isset($options['interval'])) {
					$interval = $options['interval'];
				} else {
					$interval = 1;
				}
				$i = 0;
				while ($i < 60) {
					$data[sprintf('%02d', $i)] = sprintf('%02d', $i);
					$i += $interval;
				}
				break;
			case 'hour':
				for ($i = 1; $i <= 12; $i++) {
					$data[sprintf('%02d', $i)] = $i;
				}
				break;
			case 'hour24':
				for ($i = 0; $i <= 23; $i++) {
					$data[sprintf('%02d', $i)] = $i;
				}
				break;
			case 'meridian':
				$data = array('am' => 'am', 'pm' => 'pm');
				break;
			case 'day':
				$min = 1;
				$max = 31;

				if (isset($options['min'])) {
					$min = $options['min'];
				}
				if (isset($options['max'])) {
					$max = $options['max'];
				}

				for ($i = $min; $i <= $max; $i++) {
					$data[sprintf('%02d', $i)] = $i;
				}
				break;
			case 'month':
				if ($options['monthNames'] === true) {
					$data['01'] = __d('cake', 'January');
					$data['02'] = __d('cake', 'February');
					$data['03'] = __d('cake', 'March');
					$data['04'] = __d('cake', 'April');
					$data['05'] = __d('cake', 'May');
					$data['06'] = __d('cake', 'June');
					$data['07'] = __d('cake', 'July');
					$data['08'] = __d('cake', 'August');
					$data['09'] = __d('cake', 'September');
					$data['10'] = __d('cake', 'October');
					$data['11'] = __d('cake', 'November');
					$data['12'] = __d('cake', 'December');
				} elseif (is_array($options['monthNames'])) {
					$data = $options['monthNames'];
				} else {
					for ($m = 1; $m <= 12; $m++) {
						$data[sprintf("%02s", $m)] = strftime("%m", mktime(1, 1, 1, $m, 1, 1999));
					}
				}
				break;
			case 'year':
				$current = intval(date('Y'));

				$min = !isset($options['min']) ? $current - 20 : (int)$options['min'];
				$max = !isset($options['max']) ? $current + 20 : (int)$options['max'];

				if ($min > $max) {
					list($min, $max) = array($max, $min);
				}
				if (
					!empty($options['value']) &&
					(int)$options['value'] < $min &&
					(int)$options['value'] > 0
				) {
					$min = (int)$options['value'];
				} elseif (!empty($options['value']) && (int)$options['value'] > $max) {
					$max = (int)$options['value'];
				}

				for ($i = $min; $i <= $max; $i++) {
					$data[$i] = $i;
				}
				if ($options['order'] !== 'asc') {
					$data = array_reverse($data, true);
				}
				break;
		}
		$this->_options[$name] = $data;
		return $this->_options[$name];
	}

/**
 * Sets field defaults and adds field to form security input hash.
 * Will also add the error class if the field contains validation errors.
 *
 * ### Options
 *
 * - `secure` - boolean whether or not the field should be added to the security fields.
 *   Disabling the field using the `disabled` option, will also omit the field from being
 *   part of the hashed key.
 *
 * This method will convert a numerically indexed 'disabled' into a associative
 * value. FormHelper's internals expect associative options.
 *
 * @param string $field Name of the field to initialize options for.
 * @param array $options Array of options to append options into.
 * @return array Array of options for the input.
 */
	protected function _initInputField($field, $options = []) {
		if (isset($options['secure'])) {
			$secure = $options['secure'];
			unset($options['secure']);
		} else {
			$secure = (isset($this->request['_Token']) && !empty($this->request['_Token']));
		}

		$disabledIndex = array_search('disabled', $options, true);
		if (is_int($disabledIndex)) {
			unset($options[$disabledIndex]);
			$options['disabled'] = true;
		}

		if (!isset($options['name'])) {
			$options['name'] = $field;
		}
		if (isset($options['value']) && !isset($options['val'])) {
			$options['val'] = $options['value'];
			unset($options['value']);
		}
		if (!isset($options['val'])) {
			$options['val'] = $this->_context->val($field);
		}
		$options += (array)$this->_context->attributes($field);

		if ($this->_context->hasError($field)) {
			$options = $this->addClass($options, $this->settings['errorClass']);
		}
		if (!empty($options['disabled']) || $secure === static::SECURE_SKIP) {
			return $options;
		}

		if (!isset($options['required']) && $this->_context->isRequired($field)) {
			$options['required'] = true;
		}

		if ($secure === self::SECURE_SKIP) {
			return $options;
		}

		$this->_secure($secure, $this->_secureFieldName($options));
		return $options;
	}

/**
 * Get the field name for use with _secure().
 *
 * Parses the name attribute to create a dot separated name value for use
 * in secured field hash.
 *
 * @param array $options An array of options possibly containing a name key.
 * @return string|null
 */
	protected function _secureFieldName($options) {
		if (isset($options['name'])) {
			preg_match_all('/\[(.*?)\]/', $options['name'], $matches);
			if (isset($matches[1])) {
				return $matches[1];
			}
		}
		return null;
	}

/**
 * Set/Get inputDefaults for form elements
 *
 * @param array $defaults New default values
 * @param boolean Merge with current defaults
 * @return array inputDefaults
 */
	public function inputDefaults($defaults = null, $merge = false) {
		if ($defaults !== null) {
			if ($merge) {
				$this->_inputDefaults = array_merge($this->_inputDefaults, (array)$defaults);
			} else {
				$this->_inputDefaults = (array)$defaults;
			}
		}
		return $this->_inputDefaults;
	}

/**
 * Add a new context type.
 *
 * Form context types allow FormHelper to interact with
 * data providers that come from outside CakePHP. For example
 * if you wanted to use an alternative ORM like Doctrine you could
 * create and connect a new context class to allow FormHelper to
 * read metadata from doctrine.
 *
 * @param string $type The type of context. This key
 *   can be used to overwrite existing providers.
 * @param callable $check A callable that returns a object
 *   when the form context is the correct type.
 * @return void
 */
	public function addContextProvider($name, callable $check) {
		$this->_contextProviders[$name] = $check;
	}

/**
 * Get the context instance for the current form set.
 *
 * If there is no active form null will be returned.
 *
 * @return null|Cake\View\Form\ContextInterface The context for the form.
 */
	public function context() {
		return $this->_context;
	}

/**
 * Find the matching context provider for the data.
 *
 * If no type can be matched a NullContext will be returned.
 *
 * @param mixed $data The data to get a context provider for.
 * @return mixed Context provider.
 * @throws RuntimeException when the context class does not implement the
 *   ContextInterface.
 */
	protected function _buildContext($data) {
		foreach ($this->_contextProviders as $key => $check) {
			$context = $check($this->request, $data);
			if ($context) {
				break;
			}
		}
		if (!isset($context)) {
			$context = new NullContext($this->request, $data);
		}
		if (!($context instanceof ContextInterface)) {
			throw new \RuntimeException(
				'Context objects must implement Cake\View\Form\ContextInterface'
			);
		}
		return $context;
	}

/**
 * Add a new widget to FormHelper.
 *
 * Allows you to add or replace widget instances with custom code.
 *
 * @param string $name The name of the widget. e.g. 'text'.
 * @param array|WidgetInterface Either a string class name or an object
 *    implementing the WidgetInterface.
 * @return void
 */
	public function addWidget($name, $spec) {
		$this->_registry->add([$name => $spec]);
	}

/**
 * Render a named widget.
 *
 * This is a lower level method. For built-in widgets, you should be using
 * methods like `text`, `hidden`, and `radio`. If you are using additional
 * widgets you should use this method render the widget without the label
 * or wrapping div.
 *
 * @param string $name The name of the widget. e.g. 'text'.
 * @param array $attrs The attributes for rendering the input.
 * @return void
 */
	public function widget($name, array $data = []) {
		return $this->_registry->get($name)->render($data);
	}

}