/
controller.php
1323 lines (1194 loc) · 35.6 KB
/
controller.php
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<?php
/**
* Base controller class.
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs.controller
* @since CakePHP(tm) v 0.2.9
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
/**
* Include files
*/
App::import('Controller', 'Component', false);
App::import('View', 'View', false);
/**
* Controller
*
* Application controller class for organization of business logic.
* Provides basic functionality, such as rendering views inside layouts,
* automatic model availability, redirection, callbacks, and more.
*
* @package cake
* @subpackage cake.cake.libs.controller
* @link http://book.cakephp.org/view/956/Introduction
*/
class Controller extends Object {
/**
* The name of this controller. Controller names are plural, named after the model they manipulate.
*
* @var string
* @access public
* @link http://book.cakephp.org/view/959/Controller-Attributes
*/
var $name = null;
/**
* Stores the current URL, relative to the webroot of the application.
*
* @var string
* @access public
*/
var $here = null;
/**
* The webroot of the application.
*
* @var string
* @access public
*/
var $webroot = null;
/**
* The name of the currently requested controller action.
*
* @var string
* @access public
*/
var $action = null;
/**
* An array containing the class names of models this controller uses.
*
* Example: `var $uses = array('Product', 'Post', 'Comment');`
*
* Can be set to array() to use no models. Can be set to false to
* use no models and prevent the merging of $uses with AppController
*
* @var mixed A single name as a string or a list of names as an array.
* @access protected
* @link http://book.cakephp.org/view/961/components-helpers-and-uses
*/
var $uses = false;
/**
* An array containing the names of helpers this controller uses. The array elements should
* not contain the "Helper" part of the classname.
*
* Example: `var $helpers = array('Html', 'Javascript', 'Time', 'Ajax');`
*
* @var mixed A single name as a string or a list of names as an array.
* @access protected
* @link http://book.cakephp.org/view/961/components-helpers-and-uses
*/
var $helpers = array('Session', 'Html', 'Form');
/**
* Parameters received in the current request: GET and POST data, information
* about the request, etc.
*
* @var array
* @access public
* @link http://book.cakephp.org/view/963/The-Parameters-Attribute-params
*/
var $params = array();
/**
* Data POSTed to the controller using the HtmlHelper. Data here is accessible
* using the `$this->data['ModelName']['fieldName']` pattern.
*
* @var array
* @access public
*/
var $data = array();
/**
* Holds pagination defaults for controller actions. The keys that can be included
* in this array are: 'conditions', 'fields', 'order', 'limit', 'page', and 'recursive',
* similar to the keys in the second parameter of Model::find().
*
* Pagination defaults can also be supplied in a model-by-model basis by using
* the name of the model as a key for a pagination array:
*
* {{{
* var $paginate = array(
* 'Post' => array(...),
* 'Comment' => array(...)
* );
* }}}
*
* @var array
* @access public
* @link http://book.cakephp.org/view/1231/Pagination
*/
var $paginate = array('limit' => 20, 'page' => 1);
/**
* The name of the views subfolder containing views for this controller.
*
* @var string
* @access public
*/
var $viewPath = null;
/**
* The name of the layouts subfolder containing layouts for this controller.
*
* @var string
* @access public
*/
var $layoutPath = null;
/**
* Contains variables to be handed to the view.
*
* @var array
* @access public
*/
var $viewVars = array();
/**
* An array containing the class names of the models this controller uses.
*
* @var array Array of model objects.
* @access public
*/
var $modelNames = array();
/**
* Base URL path.
*
* @var string
* @access public
*/
var $base = null;
/**
* The name of the layout file to render the view inside of. The name specified
* is the filename of the layout in /app/views/layouts without the .ctp
* extension.
*
* @var string
* @access public
* @link http://book.cakephp.org/view/962/Page-related-Attributes-layout-and-pageTitle
*/
var $layout = 'default';
/**
* Set to true to automatically render the view
* after action logic.
*
* @var boolean
* @access public
*/
var $autoRender = true;
/**
* Set to true to automatically render the layout around views.
*
* @var boolean
* @access public
*/
var $autoLayout = true;
/**
* Instance of Component used to handle callbacks.
*
* @var string
* @access public
*/
var $Component = null;
/**
* Array containing the names of components this controller uses. Component names
* should not contain the "Component" portion of the classname.
*
* Example: `var $components = array('Session', 'RequestHandler', 'Acl');`
*
* @var array
* @access public
* @link http://book.cakephp.org/view/961/components-helpers-and-uses
*/
var $components = array('Session');
/**
* The name of the View class this controller sends output to.
*
* @var string
* @access public
*/
var $view = 'View';
/**
* File extension for view templates. Defaults to Cake's conventional ".ctp".
*
* @var string
* @access public
*/
var $ext = '.ctp';
/**
* The output of the requested action. Contains either a variable
* returned from the action, or the data of the rendered view;
* You can use this var in child controllers' afterFilter() callbacks to alter output.
*
* @var string
* @access public
*/
var $output = null;
/**
* Automatically set to the name of a plugin.
*
* @var string
* @access public
*/
var $plugin = null;
/**
* Used to define methods a controller that will be cached. To cache a
* single action, the value is set to an array containing keys that match
* action names and values that denote cache expiration times (in seconds).
*
* Example:
*
* {{{
* var $cacheAction = array(
* 'view/23/' => 21600,
* 'recalled/' => 86400
* );
* }}}
*
* $cacheAction can also be set to a strtotime() compatible string. This
* marks all the actions in the controller for view caching.
*
* @var mixed
* @access public
* @link http://book.cakephp.org/view/1380/Caching-in-the-Controller
*/
var $cacheAction = false;
/**
* Used to create cached instances of models a controller uses.
* When set to true, all models related to the controller will be cached.
* This can increase performance in many cases.
*
* @var boolean
* @access public
*/
var $persistModel = false;
/**
* Holds all params passed and named.
*
* @var mixed
* @access public
*/
var $passedArgs = array();
/**
* Triggers Scaffolding
*
* @var mixed
* @access public
* @link http://book.cakephp.org/view/1103/Scaffolding
*/
var $scaffold = false;
/**
* Holds current methods of the controller
*
* @var array
* @access public
* @link
*/
var $methods = array();
/**
* This controller's primary model class name, the Inflector::classify()'ed version of
* the controller's $name property.
*
* Example: For a controller named 'Comments', the modelClass would be 'Comment'
*
* @var string
* @access public
*/
var $modelClass = null;
/**
* This controller's model key name, an underscored version of the controller's $modelClass property.
*
* Example: For a controller named 'ArticleComments', the modelKey would be 'article_comment'
*
* @var string
* @access public
*/
var $modelKey = null;
/**
* Holds any validation errors produced by the last call of the validateErrors() method/
*
* @var array Validation errors, or false if none
* @access public
*/
var $validationErrors = null;
/**
* Contains a list of the HTTP codes that CakePHP recognizes. These may be
* queried and/or modified through Controller::httpCodes(), which is also
* tasked with their lazy-loading.
*
* @var array Associative array of HTTP codes and their associated messages.
* @access private
*/
var $__httpCodes = null;
/**
* Constructor.
*
*/
function __construct() {
if ($this->name === null) {
$r = null;
if (!preg_match('/(.*)Controller/i', get_class($this), $r)) {
__("Controller::__construct() : Can not get or parse my own class name, exiting.");
$this->_stop();
}
$this->name = $r[1];
}
if ($this->viewPath == null) {
$this->viewPath = Inflector::underscore($this->name);
}
$this->modelClass = Inflector::classify($this->name);
$this->modelKey = Inflector::underscore($this->modelClass);
$this->Component =& new Component();
$childMethods = get_class_methods($this);
$parentMethods = get_class_methods('Controller');
foreach ($childMethods as $key => $value) {
$childMethods[$key] = strtolower($value);
}
foreach ($parentMethods as $key => $value) {
$parentMethods[$key] = strtolower($value);
}
$this->methods = array_diff($childMethods, $parentMethods);
parent::__construct();
}
/**
* Merge components, helpers, and uses vars from AppController and PluginAppController.
*
* @return void
* @access protected
*/
function __mergeVars() {
$pluginName = Inflector::camelize($this->plugin);
$pluginController = $pluginName . 'AppController';
if (is_subclass_of($this, 'AppController') || is_subclass_of($this, $pluginController)) {
$appVars = get_class_vars('AppController');
$uses = $appVars['uses'];
$merge = array('components', 'helpers');
$plugin = null;
if (!empty($this->plugin)) {
$plugin = $pluginName . '.';
if (!is_subclass_of($this, $pluginController)) {
$pluginController = null;
}
} else {
$pluginController = null;
}
if ($uses == $this->uses && !empty($this->uses)) {
if (!in_array($plugin . $this->modelClass, $this->uses)) {
array_unshift($this->uses, $plugin . $this->modelClass);
} elseif ($this->uses[0] !== $plugin . $this->modelClass) {
$this->uses = array_flip($this->uses);
unset($this->uses[$plugin . $this->modelClass]);
$this->uses = array_flip($this->uses);
array_unshift($this->uses, $plugin . $this->modelClass);
}
} elseif ($this->uses !== null || $this->uses !== false) {
$merge[] = 'uses';
}
foreach ($merge as $var) {
if (!empty($appVars[$var]) && is_array($this->{$var})) {
if ($var === 'components') {
$normal = Set::normalize($this->{$var});
$app = Set::normalize($appVars[$var]);
if ($app !== $normal) {
$this->{$var} = Set::merge($app, $normal);
}
} else {
$this->{$var} = Set::merge(
$this->{$var}, array_diff($appVars[$var], $this->{$var})
);
}
}
}
}
if ($pluginController && $pluginName != null) {
$appVars = get_class_vars($pluginController);
$uses = $appVars['uses'];
$merge = array('components', 'helpers');
if ($this->uses !== null || $this->uses !== false) {
$merge[] = 'uses';
}
foreach ($merge as $var) {
if (isset($appVars[$var]) && !empty($appVars[$var]) && is_array($this->{$var})) {
if ($var === 'components') {
$normal = Set::normalize($this->{$var});
$app = Set::normalize($appVars[$var]);
if ($app !== $normal) {
$this->{$var} = Set::merge($app, $normal);
}
} else {
$this->{$var} = Set::merge(
$this->{$var}, array_diff($appVars[$var], $this->{$var})
);
}
}
}
}
}
/**
* Loads Model classes based on the the uses property
* see Controller::loadModel(); for more info.
* Loads Components and prepares them for initialization.
*
* @return mixed true if models found and instance created, or cakeError if models not found.
* @access public
* @see Controller::loadModel()
* @link http://book.cakephp.org/view/977/Controller-Methods#constructClasses-986
*/
function constructClasses() {
$this->__mergeVars();
$this->Component->init($this);
if ($this->uses !== null || ($this->uses !== array())) {
if (empty($this->passedArgs) || !isset($this->passedArgs['0'])) {
$id = false;
} else {
$id = $this->passedArgs['0'];
}
if ($this->uses === false) {
$this->loadModel($this->modelClass, $id);
} elseif ($this->uses) {
$uses = is_array($this->uses) ? $this->uses : array($this->uses);
$modelClassName = $uses[0];
if (strpos($uses[0], '.') !== false) {
list($plugin, $modelClassName) = explode('.', $uses[0]);
}
$this->modelClass = $modelClassName;
foreach ($uses as $modelClass) {
$this->loadModel($modelClass);
}
}
}
return true;
}
/**
* Perform the startup process for this controller.
* Fire the Component and Controller callbacks in the correct order.
*
* - Initializes components, which fires their `initialize` callback
* - Calls the controller `beforeFilter`.
* - triggers Component `startup` methods.
*
* @return void
* @access public
*/
function startupProcess() {
$this->Component->initialize($this);
$this->beforeFilter();
$this->Component->triggerCallback('startup', $this);
}
/**
* Perform the various shutdown processes for this controller.
* Fire the Component and Controller callbacks in the correct order.
*
* - triggers the component `shutdown` callback.
* - calls the Controller's `afterFilter` method.
*
* @return void
* @access public
*/
function shutdownProcess() {
$this->Component->triggerCallback('shutdown', $this);
$this->afterFilter();
}
/**
* Queries & sets valid HTTP response codes & messages.
*
* @param mixed $code If $code is an integer, then the corresponding code/message is
* returned if it exists, null if it does not exist. If $code is an array,
* then the 'code' and 'message' keys of each nested array are added to the default
* HTTP codes. Example:
*
* httpCodes(404); // returns array(404 => 'Not Found')
*
* httpCodes(array(
* 701 => 'Unicorn Moved',
* 800 => 'Unexpected Minotaur'
* )); // sets these new values, and returns true
*
* @return mixed Associative array of the HTTP codes as keys, and the message
* strings as values, or null of the given $code does not exist.
*/
function httpCodes($code = null) {
if (empty($this->__httpCodes)) {
$this->__httpCodes = array(
100 => 'Continue', 101 => 'Switching Protocols',
200 => 'OK', 201 => 'Created', 202 => 'Accepted',
203 => 'Non-Authoritative Information', 204 => 'No Content',
205 => 'Reset Content', 206 => 'Partial Content',
300 => 'Multiple Choices', 301 => 'Moved Permanently',
302 => 'Found', 303 => 'See Other',
304 => 'Not Modified', 305 => 'Use Proxy', 307 => 'Temporary Redirect',
400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required',
403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed',
406 => 'Not Acceptable', 407 => 'Proxy Authentication Required',
408 => 'Request Time-out', 409 => 'Conflict', 410 => 'Gone',
411 => 'Length Required', 412 => 'Precondition Failed',
413 => 'Request Entity Too Large', 414 => 'Request-URI Too Large',
415 => 'Unsupported Media Type', 416 => 'Requested range not satisfiable',
417 => 'Expectation Failed', 500 => 'Internal Server Error',
501 => 'Not Implemented', 502 => 'Bad Gateway',
503 => 'Service Unavailable', 504 => 'Gateway Time-out'
);
}
if (empty($code)) {
return $this->__httpCodes;
}
if (is_array($code)) {
$this->__httpCodes = $code + $this->__httpCodes;
return true;
}
if (!isset($this->__httpCodes[$code])) {
return null;
}
return array($code => $this->__httpCodes[$code]);
}
/**
* Loads and instantiates models required by this controller.
* If Controller::$persistModel; is true, controller will cache model instances on first request,
* additional request will used cached models.
* If the model is non existent, it will throw a missing database table error, as Cake generates
* dynamic models for the time being.
*
* @param string $modelClass Name of model class to load
* @param mixed $id Initial ID the instanced model class should have
* @return mixed true when single model found and instance created, error returned if model not found.
* @access public
*/
function loadModel($modelClass = null, $id = null) {
if ($modelClass === null) {
$modelClass = $this->modelClass;
}
$cached = false;
$object = null;
$plugin = null;
if ($this->uses === false) {
if ($this->plugin) {
$plugin = $this->plugin . '.';
}
}
list($plugin, $modelClass) = pluginSplit($modelClass, true, $plugin);
if ($this->persistModel === true) {
$cached = $this->_persist($modelClass, null, $object);
}
if (($cached === false)) {
$this->modelNames[] = $modelClass;
if (!PHP5) {
$this->{$modelClass} =& ClassRegistry::init(array(
'class' => $plugin . $modelClass, 'alias' => $modelClass, 'id' => $id
));
} else {
$this->{$modelClass} = ClassRegistry::init(array(
'class' => $plugin . $modelClass, 'alias' => $modelClass, 'id' => $id
));
}
if (!$this->{$modelClass}) {
return $this->cakeError('missingModel', array(array(
'className' => $modelClass, 'webroot' => '', 'base' => $this->base
)));
}
if ($this->persistModel === true) {
$this->_persist($modelClass, true, $this->{$modelClass});
$registry =& ClassRegistry::getInstance();
$this->_persist($modelClass . 'registry', true, $registry->__objects, 'registry');
}
} else {
$this->_persist($modelClass . 'registry', true, $object, 'registry');
$this->_persist($modelClass, true, $object);
$this->modelNames[] = $modelClass;
}
return true;
}
/**
* Redirects to given $url, after turning off $this->autoRender.
* Script execution is halted after the redirect.
*
* @param mixed $url A string or array-based URL pointing to another location within the app,
* or an absolute URL
* @param integer $status Optional HTTP status code (eg: 404)
* @param boolean $exit If true, exit() will be called after the redirect
* @return mixed void if $exit = false. Terminates script if $exit = true
* @access public
* @link http://book.cakephp.org/view/982/redirect
*/
function redirect($url, $status = null, $exit = true) {
$this->autoRender = false;
if (is_array($status)) {
extract($status, EXTR_OVERWRITE);
}
$response = $this->Component->beforeRedirect($this, $url, $status, $exit);
if ($response === false) {
return;
}
if (is_array($response)) {
foreach ($response as $resp) {
if (is_array($resp) && isset($resp['url'])) {
extract($resp, EXTR_OVERWRITE);
} elseif ($resp !== null) {
$url = $resp;
}
}
}
if (function_exists('session_write_close')) {
session_write_close();
}
if (!empty($status)) {
$codes = $this->httpCodes();
if (is_string($status)) {
$codes = array_flip($codes);
}
if (isset($codes[$status])) {
$code = $msg = $codes[$status];
if (is_numeric($status)) {
$code = $status;
}
if (is_string($status)) {
$msg = $status;
}
$status = "HTTP/1.1 {$code} {$msg}";
} else {
$status = null;
}
$this->header($status);
}
if ($url !== null) {
$this->header('Location: ' . Router::url($url, true));
}
if (!empty($status) && ($status >= 300 && $status < 400)) {
$this->header($status);
}
if ($exit) {
$this->_stop();
}
}
/**
* Convenience and object wrapper method for header(). Useful when doing tests and
* asserting that particular headers have been set.
*
* @param string $status The header message that is being set.
* @return void
* @access public
*/
function header($status) {
header($status);
}
/**
* Saves a variable for use inside a view template.
*
* @param mixed $one A string or an array of data.
* @param mixed $two Value in case $one is a string (which then works as the key).
* Unused if $one is an associative array, otherwise serves as the values to $one's keys.
* @return void
* @access public
* @link http://book.cakephp.org/view/979/set
*/
function set($one, $two = null) {
$data = array();
if (is_array($one)) {
if (is_array($two)) {
$data = array_combine($one, $two);
} else {
$data = $one;
}
} else {
$data = array($one => $two);
}
$this->viewVars = array_merge($this->viewVars, $data);
}
/**
* Internally redirects one action to another. Does not perform another HTTP request unlike Controller::redirect()
*
* Examples:
*
* {{{
* setAction('another_action');
* setAction('action_with_parameters', $parameter1);
* }}}
*
* @param string $action The new action to be 'redirected' to
* @param mixed Any other parameters passed to this method will be passed as
* parameters to the new action.
* @return mixed Returns the return value of the called action
* @access public
*/
function setAction($action) {
$this->action = $action;
$args = func_get_args();
unset($args[0]);
return call_user_func_array(array(&$this, $action), $args);
}
/**
* Controller callback to tie into Auth component.
* Only called when AuthComponent::$authorize is set to 'controller'.
*
* @return bool true if authorized, false otherwise
* @access public
* @link http://book.cakephp.org/view/1275/authorize
*/
function isAuthorized() {
trigger_error(sprintf(
__('%s::isAuthorized() is not defined.', true), $this->name
), E_USER_WARNING);
return false;
}
/**
* Returns number of errors in a submitted FORM.
*
* @return integer Number of errors
* @access public
*/
function validate() {
$args = func_get_args();
$errors = call_user_func_array(array(&$this, 'validateErrors'), $args);
if ($errors === false) {
return 0;
}
return count($errors);
}
/**
* Validates models passed by parameters. Example:
*
* `$errors = $this->validateErrors($this->Article, $this->User);`
*
* @param mixed A list of models as a variable argument
* @return array Validation errors, or false if none
* @access public
*/
function validateErrors() {
$objects = func_get_args();
if (empty($objects)) {
return false;
}
$errors = array();
foreach ($objects as $object) {
$this->{$object->alias}->set($object->data);
$errors = array_merge($errors, $this->{$object->alias}->invalidFields());
}
return $this->validationErrors = (!empty($errors) ? $errors : false);
}
/**
* Instantiates the correct view class, hands it its data, and uses it to render the view output.
*
* @param string $action Action name to render
* @param string $layout Layout to use
* @param string $file File to use for rendering
* @return string Full output string of view contents
* @access public
* @link http://book.cakephp.org/view/980/render
*/
function render($action = null, $layout = null, $file = null) {
$this->beforeRender();
$viewClass = $this->view;
if ($this->view != 'View') {
list($plugin, $viewClass) = pluginSplit($viewClass);
$viewClass = $viewClass . 'View';
App::import('View', $this->view);
}
$this->Component->triggerCallback('beforeRender', $this);
$this->params['models'] = $this->modelNames;
if (Configure::read() > 2) {
$this->set('cakeDebug', $this);
}
$View =& new $viewClass($this);
if (!empty($this->modelNames)) {
$models = array();
foreach ($this->modelNames as $currentModel) {
if (isset($this->$currentModel) && is_a($this->$currentModel, 'Model')) {
$models[] = Inflector::underscore($currentModel);
}
$isValidModel = (
isset($this->$currentModel) && is_a($this->$currentModel, 'Model') &&
!empty($this->$currentModel->validationErrors)
);
if ($isValidModel) {
$View->validationErrors[Inflector::camelize($currentModel)] =&
$this->$currentModel->validationErrors;
}
}
$models = array_diff(ClassRegistry::keys(), $models);
foreach ($models as $currentModel) {
if (ClassRegistry::isKeySet($currentModel)) {
$currentObject =& ClassRegistry::getObject($currentModel);
if (is_a($currentObject, 'Model') && !empty($currentObject->validationErrors)) {
$View->validationErrors[Inflector::camelize($currentModel)] =&
$currentObject->validationErrors;
}
}
}
}
$this->autoRender = false;
$this->output .= $View->render($action, $layout, $file);
return $this->output;
}
/**
* Returns the referring URL for this request.
*
* @param string $default Default URL to use if HTTP_REFERER cannot be read from headers
* @param boolean $local If true, restrict referring URLs to local server
* @return string Referring URL
* @access public
* @link http://book.cakephp.org/view/987/referer
*/
function referer($default = null, $local = false) {
$ref = env('HTTP_REFERER');
if (!empty($ref) && defined('FULL_BASE_URL')) {
$base = FULL_BASE_URL . $this->webroot;
if (strpos($ref, $base) === 0) {
$return = substr($ref, strlen($base));
if ($return[0] != '/') {
$return = '/'.$return;
}
return $return;
} elseif (!$local) {
return $ref;
}
}
if ($default != null) {
$url = Router::url($default, true);
return $url;
}
return '/';
}
/**
* Forces the user's browser not to cache the results of the current request.
*
* @return void
* @access public
* @link http://book.cakephp.org/view/988/disableCache
*/
function disableCache() {
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
}
/**
* Shows a message to the user for $pause seconds, then redirects to $url.
* Uses flash.ctp as the default layout for the message.
* Does not work if the current debug level is higher than 0.
*
* @param string $message Message to display to the user
* @param mixed $url Relative string or array-based URL to redirect to after the time expires
* @param integer $pause Time to show the message
* @param string $layout Layout you want to use, defaults to 'flash'
* @return void Renders flash layout
* @access public
* @link http://book.cakephp.org/view/983/flash
*/
function flash($message, $url, $pause = 1, $layout = 'flash') {
$this->autoRender = false;
$this->set('url', Router::url($url));
$this->set('message', $message);
$this->set('pause', $pause);
$this->set('page_title', $message);
$this->render(false, $layout);
}
/**
* Converts POST'ed form data to a model conditions array, suitable for use in a Model::find() call.
*
* @param array $data POST'ed data organized by model and field
* @param mixed $op A string containing an SQL comparison operator, or an array matching operators
* to fields
* @param string $bool SQL boolean operator: AND, OR, XOR, etc.
* @param boolean $exclusive If true, and $op is an array, fields not included in $op will not be
* included in the returned conditions
* @return array An array of model conditions
* @access public
* @link http://book.cakephp.org/view/989/postConditions
*/
function postConditions($data = array(), $op = null, $bool = 'AND', $exclusive = false) {
if (!is_array($data) || empty($data)) {
if (!empty($this->data)) {
$data = $this->data;