/lib/Cake/View/Helper/FormHelper.php

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<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright   Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link        http://cakephp.org CakePHP(tm) Project
 * @package       Cake.View.Helper
 * @since       CakePHP(tm) v 0.10.0.1076
 * @license     MIT License (http://www.opensource.org/licenses/mit-license.php)
 */
App::uses('ClassRegistry', 'Utility');
App::uses('AppHelper', 'View/Helper');
App::uses('Hash', 'Utility');

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

/**
 * 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()
	);

/**
 * 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();

/**
 * Copies the validationErrors variable from the View object into this instance
 *
 * @param View $View The View this helper is being attached to.
 * @param array $settings Configuration settings for the helper.
 */
	public function __construct(View $View, $settings = array()) {
		parent::__construct($View, $settings);
		$this->validationErrors =& $View->validationErrors;
	}

/**
 * Guess the location for a model based on its name and tries to create a new instance
 * or get an already created instance of the model
 *
 * @param string $model
 * @return Model model instance
 */
	protected function _getModel($model) {
		$object = null;
		if (!$model || $model === 'Model') {
			return $object;
		}

		if (array_key_exists($model, $this->_models)) {
			return $this->_models[$model];
		}

		if (ClassRegistry::isKeySet($model)) {
			$object = ClassRegistry::getObject($model);
		} elseif (isset($this->request->params['models'][$model])) {
			$plugin = $this->request->params['models'][$model]['plugin'];
			$plugin .= ($plugin) ? '.' : null;
			$object = ClassRegistry::init(array(
				'class' => $plugin . $this->request->params['models'][$model]['className'],
				'alias' => $model
			));
		} elseif (ClassRegistry::isKeySet($this->defaultModel)) {
			$defaultObject = ClassRegistry::getObject($this->defaultModel);
			if (in_array($model, array_keys($defaultObject->getAssociated()), true) && isset($defaultObject->{$model})) {
				$object = $defaultObject->{$model};
			}
		} else {
			$object = ClassRegistry::init($model, true);
		}

		$this->_models[$model] = $object;
		if (!$object) {
			return null;
		}

		$this->fieldset[$model] = array('fields' => null, 'key' => $object->primaryKey, 'validates' => null);
		return $object;
	}

/**
 * Inspects the model properties to extract information from them.
 * Currently it can extract information from the the fields, the primary key and required fields
 *
 * The $key parameter accepts the following list of values:
 *
 * - key: Returns the name of the primary key for the model
 * - fields: Returns the model schema
 * - validates: returns the list of fields that are required
 * - errors: returns the list of validation errors
 *
 * If the $field parameter is passed if will return the information for that sole field.
 *
 * `$this->_introspectModel('Post', 'fields', 'title');` will return the schema information for title column
 *
 * @param string $model name of the model to extract information from
 * @param string $key name of the special information key to obtain (key, fields, validates, errors)
 * @param string $field name of the model field to get information from
 * @return mixed information extracted for the special key and field in a model
 */
	protected function _introspectModel($model, $key, $field = null) {
		$object = $this->_getModel($model);
		if (!$object) {
			return;
		}

		if ($key === 'key') {
			return $this->fieldset[$model]['key'] = $object->primaryKey;
		}

		if ($key === 'fields') {
			if (!isset($this->fieldset[$model]['fields'])) {
				$this->fieldset[$model]['fields'] = $object->schema();
				foreach ($object->hasAndBelongsToMany as $alias => $assocData) {
					$this->fieldset[$object->alias]['fields'][$alias] = array('type' => 'multiple');
				}
			}
			if (empty($field)) {
				return $this->fieldset[$model]['fields'];
			} elseif (isset($this->fieldset[$model]['fields'][$field])) {
				return $this->fieldset[$model]['fields'][$field];
			} else {
				return isset($object->hasAndBelongsToMany[$field]) ? array('type' => 'multiple') : null;
			}
		}

		if ($key === 'errors' && !isset($this->validationErrors[$model])) {
			$this->validationErrors[$model] =& $object->validationErrors;
			return $this->validationErrors[$model];
		} elseif ($key === 'errors' && isset($this->validationErrors[$model])) {
			return $this->validationErrors[$model];
		}

		if ($key === 'validates' && !isset($this->fieldset[$model]['validates'])) {
			$validates = array();
			if (!empty($object->validate)) {
				foreach ($object->validator() as $validateField => $validateProperties) {
					if ($this->_isRequiredField($validateProperties)) {
						$validates[$validateField] = true;
					}
				}
			}
			$this->fieldset[$model]['validates'] = $validates;
		}

		if ($key === 'validates') {
			if (empty($field)) {
				return $this->fieldset[$model]['validates'];
			} else {
				return isset($this->fieldset[$model]['validates'][$field]) ?
					$this->fieldset[$model]['validates'] : null;
			}
		}
	}

/**
 * Returns if a field is required to be filled based on validation properties from the validating object.
 *
 * @param CakeValidationSet $validationRules
 * @return boolean true if field is required to be filled, false otherwise
 */
	protected function _isRequiredField($validationRules) {
		if (empty($validationRules) || count($validationRules) === 0) {
			return false;
		}

		$isUpdate = $this->requestType === 'put';
		foreach ($validationRules as $rule) {
			$rule->isUpdate($isUpdate);
			if ($rule->skip()) {
				continue;
			}

			return !$rule->allowEmpty;
		}
		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);
		$errors = array();
		if (!empty($entity) && isset($this->validationErrors[$model])) {
			$errors = $this->validationErrors[$model];
		}
		if (!empty($entity) && empty($errors)) {
			$errors = $this->_introspectModel($model, 'errors');
		}
		if (empty($errors)) {
			return false;
		}
		$errors = Hash::get($errors, join('.', $entity));
		return $errors === null ? false : $errors;
	}

/**
 * Returns an HTML FORM element.
 *
 * ### Options:
 *
 * - `type` Form method defaults to POST
 * - `action`  The controller action the form submits to, (optional).
 * - `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.
 * - `inputDefaults` set the default $options for FormHelper::input(). Any options that would
 *   be set when using FormHelper::input() can be set here.  Options set with `inputDefaults`
 *   can be overridden when calling input()
 * - `encoding` Set the accept-charset encoding for the form.  Defaults to `Configure::read('App.encoding')`
 *
 * @param string|array $model The model object which the form is being defined for. Should
 *   include the plugin name for plugin forms.  e.g. `ContactManager.Contact`.
 *   If an array is passed and $options argument is empty, the array will be used as options.
 * @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 = array()) {
		$created = $id = false;
		$append = '';

		if (is_array($model) && empty($options)) {
			$options = $model;
			$model = null;
		}

		if (empty($model) && $model !== false && !empty($this->request->params['models'])) {
			$model = key($this->request->params['models']);
		} elseif (empty($model) && empty($this->request->params['models'])) {
			$model = false;
		}
		$this->defaultModel = $model;

		$key = null;
		if ($model !== false) {
			$key = $this->_introspectModel($model, 'key');
			$this->setEntity($model, true);
		}

		if ($model !== false && $key) {
			$recordExists = (
				isset($this->request->data[$model]) &&
				!empty($this->request->data[$model][$key]) &&
				!is_array($this->request->data[$model][$key])
			);

			if ($recordExists) {
				$created = true;
				$id = $this->request->data[$model][$key];
			}
		}

		$options = array_merge(array(
			'type' => ($created && empty($options['action'])) ? 'put' : 'post',
			'action' => null,
			'url' => null,
			'default' => true,
			'encoding' => strtolower(Configure::read('App.encoding')),
			'inputDefaults' => array()),
		$options);
		$this->inputDefaults($options['inputDefaults']);
		unset($options['inputDefaults']);

		if (!isset($options['id'])) {
			$domId = isset($options['action']) ? $options['action'] : $this->request['action'];
			$options['id'] = $this->domId($domId . 'Form');
		}

		if ($options['action'] === null && $options['url'] === null) {
			$options['action'] = $this->request->here(false);
		} elseif (empty($options['url']) || is_array($options['url'])) {
			if (empty($options['url']['controller'])) {
				if (!empty($model)) {
					$options['url']['controller'] = Inflector::underscore(Inflector::pluralize($model));
				} elseif (!empty($this->request->params['controller'])) {
					$options['url']['controller'] = Inflector::underscore($this->request->params['controller']);
				}
			}
			if (empty($options['action'])) {
				$options['action'] = $this->request->params['action'];
			}

			$plugin = null;
			if ($this->plugin) {
				$plugin = Inflector::underscore($this->plugin);
			}
			$actionDefaults = array(
				'plugin' => $plugin,
				'controller' => $this->_View->viewPath,
				'action' => $options['action'],
			);
			$options['action'] = array_merge($actionDefaults, (array)$options['url']);
			if (empty($options['action'][0]) && !empty($id)) {
				$options['action'][0] = $id;
			}
		} elseif (is_string($options['url'])) {
			$options['action'] = $options['url'];
		}
		unset($options['url']);

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

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

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

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

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

		$this->fields = array();
		$append .= $this->_csrfField();

		if (!empty($append)) {
			$append = $this->Html->useTag('block', ' style="display:none;"', $append);
		}

		if ($model !== false) {
			$this->setEntity($model, true);
			$this->_introspectModel($model, 'fields');
		}
		return $this->Html->useTag('form', $action, $htmlAttributes) . $append;
	}

/**
 * Return a CSRF input if the _Token is present.
 * Used to secure forms in conjunction with SecurityComponent
 *
 * @return string
 */
	protected function _csrfField() {
		if (empty($this->request->params['_Token'])) {
			return '';
		}
		if (!empty($this->request['_Token']['unlockedFields'])) {
			foreach ((array)$this->request['_Token']['unlockedFields'] as $unlocked) {
				$this->_unlockedFields[] = $unlocked;
			}
		}
		return $this->hidden('_Token.key', array(
			'value' => $this->request->params['_Token']['key'], 'id' => 'Token' . mt_rand(),
			'secure' => self::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, $submitOptions);
		}
		if (isset($this->request['_Token']) && !empty($this->request['_Token'])) {
			$out .= $this->secure($this->fields);
			$this->fields = array();
		}
		$this->setEntity(null);
		$out .= $this->Html->useTag('formend');

		$this->_View->modelScope = false;
		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'));

		$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('block', ' style="display:none;"', $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|array $field Reference to field to be secured.  Should be dot separated to indicate nesting.
 * @param mixed $value Field value, if value should not be tampered with.
 * @return void
 */
	protected function _secure($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`  bool  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 classname 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);
		} else {
			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, $options = array()) {
		if (empty($fieldName)) {
			$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 $fields is null the current model
 * will be used.
 *
 * In addition to controller fields output, `$fields` can be used to control legend
 * and fieldset rendering with the `fieldset` and `legend` keys.
 * `$form->inputs(array('legend' => 'My legend'));` Would generate an input set with
 * a custom legend.  You can customize individual inputs through `$fields` as well.
 *
 * {{{
 *	$form->inputs(array(
 *		'name' => array('label' => 'custom label')
 *	));
 * }}}
 *
 * In addition to fields control, inputs() allows you to use a few additional options.
 *
 * - `fieldset` Set to false to disable the fieldset. If a string is supplied it will be used as
 *    the classname 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.
 *
 * @param array $fields An array of fields to generate inputs for, or null.
 * @param array $blacklist a simple array of fields to not create inputs for.
 * @return string Completed form inputs.
 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::inputs
 */
	public function inputs($fields = null, $blacklist = null) {
		$fieldset = $legend = true;
		$model = $this->model();
		if (is_array($fields)) {
			if (array_key_exists('legend', $fields)) {
				$legend = $fields['legend'];
				unset($fields['legend']);
			}

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

		if (empty($fields)) {
			$fields = array_keys($this->_introspectModel($model, 'fields'));
		}

		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 && $legend) {
			return $this->Html->useTag('fieldset', $fieldsetClass, $this->Html->useTag('legend', $legend) . $out);
		} elseif ($fieldset) {
			return $this->Html->useTag('fieldset', $fieldsetClass, $out);
		} else {
			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
 * - `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 = array_merge(
			array('before' => null, 'between' => null, 'after' => null, 'format' => null),
			$this->_inputDefaults,
			$options
		);

		$modelKey = $this->model();
		$fieldKey = $this->field();

		if (!isset($options['type'])) {
			$magicType = true;
			$options['type'] = 'text';
			if (isset($options['options'])) {
				$options['type'] = 'select';
			} elseif (in_array($fieldKey, array('psword', 'passwd', 'password'))) {
				$options['type'] = 'password';
			} elseif (isset($options['checked'])) {
				$options['type'] = 'checkbox';
			} elseif ($fieldDef = $this->_introspectModel($modelKey, 'fields', $fieldKey)) {
				$type = $fieldDef['type'];
				$primaryKey = $this->fieldset[$modelKey]['key'];
			}

			if (isset($type)) {
				$map = array(
					'string' => 'text', 'datetime' => 'datetime',
					'boolean' => 'checkbox', 'timestamp' => 'datetime',
					'text' => 'textarea', 'time' => 'time',
					'date' => 'date', 'float' => 'number',
					'integer' => 'number'
				);

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

			if ($modelKey === $fieldKey) {
				$options['type'] = 'select';
				if (!isset($options['multiple'])) {
					$options['multiple'] = 'multiple';
				}
			}
		}
		$types = array('checkbox', 'radio', 'select');

		if (
			(!isset($options['options']) && in_array($options['type'], $types)) ||
			(isset($magicType) && in_array($options['type'], array('text', 'number')))
		) {
			$varName = Inflector::variable(
				Inflector::pluralize(preg_replace('/_id$/', '', $fieldKey))
			);
			$varOptions = $this->_View->getVar($varName);
			if (is_array($varOptions)) {
				if ($options['type'] !== 'radio') {
					$options['type'] = 'select';
				}
				$options['options'] = $varOptions;
			}

			if ($options['type'] === 'select' && array_key_exists('step', $options)) {
				unset($options['step']);
			}
		}

		$autoLength = (
			!array_key_exists('maxlength', $options) &&
			isset($fieldDef['length']) &&
			is_scalar($fieldDef['length']) &&
			$options['type'] !== 'select'
		);
		if ($autoLength && $options['type'] == 'text') {
			$options['maxlength'] = $fieldDef['length'];
		}
		if ($autoLength && $fieldDef['type'] == 'float') {
			$options['maxlength'] = array_sum(explode(',', $fieldDef['length'])) + 1;
		}

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

		if (!empty($div)) {
			$divOptions['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->_introspectModel($modelKey, 'validates', $fieldKey)) {
				$divOptions = $this->addClass($divOptions, 'required');
			}
			if (!isset($divOptions['tag'])) {
				$divOptions['tag'] = 'div';
			}
		}

		$label = null;
		if (isset($options['label']) && $options['type'] !== 'radio') {
			$label = $options['label'];
			unset($options['label']);
		}

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

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

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

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

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

		if ($options['type'] === 'datetime' || $options['type'] === 'date' || $options['type'] === 'time' || $options['type'] === 'select') {
			$options += array('empty' => false);
		}
		if ($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_merge(
			array('before' => null, 'label' => null, 'between' => null, 'input' => null, 'after' => null, 'error' => null),
			array('before' => $options['before'], 'label' => $label, 'between' => $options['between'], 'after' => $options['after'])
		);
		$format = null;
		if (is_array($options['format']) && in_array('input', $options['format'])) {
			$format = $options['format'];
		}
		unset($options['type'], $options['before'], $options['between'], $options['after'], $options['format']);

		switch ($type) {
			case 'hidden':
				$input = $this->hidden($fieldName, $options);
				$format = array('input');
				unset($divOptions);
			break;
			case 'checkbox':
				$input = $this->checkbox($fieldName, $options);
				$format = $format ? $format : array('before', 'input', 'between', 'label', 'after', 'error');
			break;
			case 'radio':
				if (isset($out['between'])) {
					$options['between'] = $out['between'];
					$out['between'] = null;
				}
				$input = $this->radio($fieldName, $radioOptions, $options);
			break;
			case 'file':
				$input = $this->file($fieldName, $options);
			break;
			case 'select':
				$options += array('options' => array(), 'value' => $selected);
				$list = $options['options'];
				unset($options['options']);
				$input = $this->select($fieldName, $list, $options);
			break;
			case 'time':
				$options['value'] = $selected;
				$input = $this->dateTime($fieldName, null, $timeFormat, $options);
			break;
			case 'date':
				$options['value'] = $selected;
				$input = $this->dateTime($fieldName, $dateFormat, null, $options);
			break;
			case 'datetime':
				$options['value'] = $selected;
				$input = $this->dateTime($fieldName, $dateFormat, $timeFormat, $options);
			break;
			case 'textarea':
				$input = $this->textarea($fieldName, $options + array('cols' => '30', 'rows' => '6'));
			break;
			case 'url':
				$input = $this->text($fieldName, array('type' => 'url') + $options);
			break;
			default:
				$input = $this->{$type}($fieldName, $options);
		}

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

		$out['input'] = $input;
		$format = $format ? $format : array('before', 'label', 'between', 'input', 'after', 'error');
		$output = '';
		foreach ($format as $element) {
			$output .= $out[$element];
			unset($out[$element]);
		}

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

/**
 * 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 $options Options for the label element.
 * @return string Generated label element
 * @deprecated 'NONE' option is deprecated and will be removed in 3.0
 */
	protected function _inputLabel($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 = $this->_initInputField($fieldName, $options) + array('hiddenField' => true);
		$value = current($this->value($valueOptions));
		$output = "";

		if (empty($options['value'])) {
			$options['value'] = 1;
		}
		if (
			(!isset($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'] == true) {
				$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' => '')));
	}

/**
 * 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
 * - `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) ? __('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']);

		foreach ($options as $optValue => $optTitle) {
			$optionsHere = array('value' => $optValue);

			if (isset($value) && strval($optValue) === strval($value)) {
				$optionsHere['checked'] = 'checked';
			}
			if ($disabled && (!is_array($disabled) || in_array($optValue, $disabled))) {
				$optionsHere['disabled'] = true;
			}
			$tagName = Inflector::camelize(
				$attributes['id'] . '_' . Inflector::slug($optValue)
			);

			if ($label) {
				$optTitle = $this->Html->useTag('label', $tagName, '', $optTitle);
			}
			$allOptions = array_merge($attributes, $optionsHere);
			$out[] = $this->Html->useTag('radio', $attributes['name'], $tagName,
				array_diff_key($allOptions, array('name' => '', 'type' => '', 'id' => '')),
				$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 ($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="data[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 $params Parameters for the method call
 * @return string Formatted input method.
 * @throws CakeException When there are no params for the method call.
 */
	public function __call($method, $params) {
		$options = array();
		if (empty($params)) {
			throw new CakeException(__d('cake_dev', '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' => '')));
	}

/**
 * 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' => '', 'name' => '')), $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()) {
		$secure = true;

		if (isset($options['secure'])) {
			$secure = $options['secure'];
			unset($options['secure']);
		}
		$options = $this->_initInputField($fieldName, array_merge(
			$options, array('secure' => self::SECURE_SKIP)
		));

		if ($secure && $secure !== self::SECURE_SKIP) {
			$this->_secure(true, null, '' . $options['value']);
		}

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

/**
 * 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'] = self::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)));
		}

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

/**
 * 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…