Subversion-Projekte lars-tiefland.cakephp

<?php
/* SVN FILE: $Id: controller.php 7945 2008-12-19 02:16:01Z gwoo $ */
/**
 * Base controller class.
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework (http://www.cakephp.org)
 * Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 * @link          http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package       cake
 * @subpackage    cake.cake.libs.controller
 * @since         CakePHP(tm) v 0.2.9
 * @version       $Revision: 7945 $
 * @modifiedby    $LastChangedBy: gwoo $
 * @lastmodified  $Date: 2008-12-18 18:16:01 -0800 (Thu, 18 Dec 2008) $
 * @license       http://www.opensource.org/licenses/mit-license.php The MIT License
 */
/**
 * Include files
 */
App::import('Core', array('Component', 'View'));
/**
 * 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/49/Controllers
 *
 */
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/52/name
 */
        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. Helpful if your application is placed in a folder under the current domain name.
 *
 * @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');
 *
 * @var mixed A single name as a string or a list of names as an array.
 * @access protected
 * @link http://book.cakephp.org/view/53/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/53/components-helpers-and-uses
 */
        var $helpers = array('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/55/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/164/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();
/**
 * Text to be used for the $title_for_layout layout variable (usually
 * placed inside <title> tags.)
 *
 * @var boolean
 * @access public
 * @link http://book.cakephp.org/view/54/Page-related-Attributes-layout-and-pageTitle
 */
        var $pageTitle = false;
/**
 * 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/54/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/53/components-helpers-and-uses
 */
        var $components = array();
/**
 * 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/346/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/105/Scaffolding
 */
        var $scaffold = false;
/**
 * Holds current methods of the controller
 *
 * @var array
 * @access public
 * @link
 */
        var $methods = array();
/**
 * Constructor.
 *
 */
        function __construct() {
                if ($this->name === null) {
                        $r = null;
                        if (!preg_match('/(.*)Controller/i', get_class($this), $r)) {
                                die (__("Controller::__construct() : Can not get or parse my own class name, exiting."));
                        }
                        $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 $var) {
                                if (isset($appVars[$var]) && !empty($appVars[$var]) && is_array($this->{$var})) {
                                        if ($var === 'components') {
                                                $normal = Set::normalize($this->{$var});
                                                $app = Set::normalize($appVars[$var]);
                                                $this->{$var} = Set::merge($normal, $app);
                                        } else {
                                                $this->{$var} = Set::merge($this->{$var}, array_diff($appVars[$var], $this->{$var}));
                                        }
                                }
                        }
                }

                if ($pluginController) {
                        $appVars = get_class_vars($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]);
                                                $this->{$var} = Set::merge($normal, array_diff_assoc($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/429/constructClasses
 */
        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;
        }
/**
 * Loads and instantiates models required by this controller.
 * If Controller::persistModel; is true, controller will create cached 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 $id Initial ID the instanced model class should have
 * @return mixed true when single model found and instance created error returned if models not found.
 * @access public
 */
        function loadModel($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 . '.';
                        }
                }

                if (strpos($modelClass, '.') !== false) {
                        list($plugin, $modelClass) = explode('.', $modelClass);
                        $plugin = $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;
                }
        }
/**
 * 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 $exit = true
 * @access public
 * @link http://book.cakephp.org/view/425/redirect
 */
        function redirect($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 = 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 (is_string($status)) {
                                $codes = array_combine(array_values($codes), array_keys($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;
                        }
                }

                if (!empty($status)) {
                        $this->header($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 method for header()
 *
 * @param string $status
 * @return void
 * @access public
 */
        function header($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 $one's keys.
 * @return void
 * @access public
 * @link http://book.cakephp.org/view/427/set
 */
        function set($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);
                }

                foreach ($data as $name => $value) {
                        if ($name === 'title') {
                                $this->pageTitle = $value;
                        } else {
                                if ($two === null && is_array($one)) {
                                        $this->viewVars[Inflector::variable($name)] = $value;
                                } else {
                                        $this->viewVars[$name] = $value;
                                }
                        }
                }
        }
/**
 * Internally redirects one action to another. 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/396/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 (!count($objects)) {
                        return false;
                }

                $errors = array();
                foreach ($objects as $object) {
                        $this->{$object->alias}->set($object->data);
                        $errors = array_merge($errors, $this->{$object->alias}->invalidFields());
                }

                return $this->validationErrors = (count($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 $file File to use for rendering
 * @return string Full output string of view contents
 * @access public
 * @link http://book.cakephp.org/view/428/render
 */
        function render($action = null, $layout = null, $file = null) {
                $this->beforeRender();

                $viewClass = $this->view;
                if ($this->view != 'View') {
                        if (strpos($viewClass, '.') !== false) {
                                list($plugin, $viewClass) = explode('.', $viewClass);
                        }
                        $viewClass = $viewClass . 'View';
                        App::import('View', $this->view);
                }

                $this->Component->beforeRender($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);
                                }
                                if (isset($this->$currentModel) && is_a($this->$currentModel, 'Model') && !empty($this->$currentModel->validationErrors)) {
                                        $View->validationErrors[Inflector::camelize($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 $local If true, restrict referring URLs to local server
 * @return string Referring URL
 * @access public
 * @link http://book.cakephp.org/view/430/referer
 */
        function referer($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) {
                        return $default;
                }
                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/431/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 string $url Relative URL to redirect to after the time expires
 * @param integer $pause Time to show the message
 * @return void Renders flash layout
 * @access public
 * @link http://book.cakephp.org/view/426/flash
 */
        function flash($message, $url, $pause = 1) {
                $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, 'flash');
        }
/**
 * 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 $op will not be included in the returned conditions
 * @return array An array of model conditions
 * @access public
 * @link http://book.cakephp.org/view/432/postConditions
 */
        function postConditions($data = array(), $op = null, $bool = 'AND', $exclusive = false) {
                if (!is_array($data) || empty($data)) {
                        if (!empty($this->data)) {
                                $data = $this->data;
                        } else {
                                return null;
                        }
                }
                $cond = array();

                if ($op === null) {
                        $op = '';
                }

                foreach ($data as $model => $fields) {
                        foreach ($fields as $field => $value) {
                                $key = $model.'.'.$field;
                                $fieldOp = $op;
                                if (is_array($op) && array_key_exists($key, $op)) {
                                        $fieldOp = $op[$key];
                                } elseif (is_array($op) && array_key_exists($field, $op)) {
                                        $fieldOp = $op[$field];
                                } elseif (is_array($op)) {
                                        $fieldOp = false;
                                }
                                if ($exclusive && $fieldOp === false) {
                                        continue;
                                }
                                $fieldOp = strtoupper(trim($fieldOp));
                                if ($fieldOp === 'LIKE') {
                                        $key = $key.' LIKE';
                                        $value = '%'.$value.'%';
                                } elseif ($fieldOp && $fieldOp != '=') {
                                        $key = $key.' '.$fieldOp;
                                }
                                $cond[$key] = $value;
                        }
                }
                if ($bool != null && strtoupper($bool) != 'AND') {
                        $cond = array($bool => $cond);
                }
                return $cond;
        }
/**
 * Handles automatic pagination of model records.
 *
 * @param mixed $object Model to paginate (e.g: model instance, or 'Model', or 'Model.InnerModel')
 * @param mixed $scope Conditions to use while paginating
 * @param array $whitelist List of allowed options for paging
 * @return array Model query results
 * @access public
 * @link http://book.cakephp.org/view/165/Controller-Setup
 */
        function paginate($object = null, $scope = array(), $whitelist = array()) {
                if (is_array($object)) {
                        $whitelist = $scope;
                        $scope = $object;
                        $object = null;
                }
                $assoc = null;

                if (is_string($object)) {
                        $assoc = null;

                        if (strpos($object, '.') !== false) {
                                list($object, $assoc) = explode('.', $object);
                        }

                        if ($assoc && isset($this->{$object}->{$assoc})) {
                                $object = $this->{$object}->{$assoc};
                        } elseif ($assoc && isset($this->{$this->modelClass}) && isset($this->{$this->modelClass}->{$assoc})) {
                                $object = $this->{$this->modelClass}->{$assoc};
                        } elseif (isset($this->{$object})) {
                                $object = $this->{$object};
                        } elseif (isset($this->{$this->modelClass}) && isset($this->{$this->modelClass}->{$object})) {
                                $object = $this->{$this->modelClass}->{$object};
                        }
                } elseif (empty($object) || $object === null) {
                        if (isset($this->{$this->modelClass})) {
                                $object = $this->{$this->modelClass};
                        } else {
                                $className = null;
                                $name = $this->uses[0];
                                if (strpos($this->uses[0], '.') !== false) {
                                        list($name, $className) = explode('.', $this->uses[0]);
                                }
                                if ($className) {
                                        $object = $this->{$className};
                                } else {
                                        $object = $this->{$name};
                                }
                        }
                }

                if (!is_object($object)) {
                        trigger_error(sprintf(__('Controller::paginate() - can\'t find model %1$s in controller %2$sController', true), $object, $this->name), E_USER_WARNING);
                        return array();
                }
                $options = array_merge($this->params, $this->params['url'], $this->passedArgs);

                if (isset($this->paginate[$object->alias])) {
                        $defaults = $this->paginate[$object->alias];
                } else {
                        $defaults = $this->paginate;
                }

                if (isset($options['show'])) {
                        $options['limit'] = $options['show'];
                }

                if (isset($options['sort'])) {
                        $direction = null;
                        if (isset($options['direction'])) {
                                $direction = strtolower($options['direction']);
                        }
                        if ($direction != 'asc' && $direction != 'desc') {
                                $direction = 'asc';
                        }
                        $options['order'] = array($options['sort'] => $direction);
                }

                if (!empty($options['order']) && is_array($options['order'])) {
                        $alias = $object->alias ;
                        $key = $field = key($options['order']);

                        if (strpos($key, '.') !== false) {
                                list($alias, $field) = explode('.', $key);
                        }
                        $value = $options['order'][$key];
                        unset($options['order'][$key]);

                        if (isset($object->{$alias}) && $object->{$alias}->hasField($field)) {
                                $options['order'][$alias . '.' . $field] = $value;
                        } elseif ($object->hasField($field)) {
                                $options['order'][$alias . '.' . $field] = $value;
                        }
                }
                $vars = array('fields', 'order', 'limit', 'page', 'recursive');
                $keys = array_keys($options);
                $count = count($keys);

                for ($i = 0; $i < $count; $i++) {
                        if (!in_array($keys[$i], $vars, true)) {
                                unset($options[$keys[$i]]);
                        }
                        if (empty($whitelist) && ($keys[$i] === 'fields' || $keys[$i] === 'recursive')) {
                                unset($options[$keys[$i]]);
                        } elseif (!empty($whitelist) && !in_array($keys[$i], $whitelist)) {
                                unset($options[$keys[$i]]);
                        }
                }
                $conditions = $fields = $order = $limit = $page = $recursive = null;

                if (!isset($defaults['conditions'])) {
                        $defaults['conditions'] = array();
                }
                extract($options = array_merge(array('page' => 1, 'limit' => 20), $defaults, $options));

                if (is_array($scope) && !empty($scope)) {
                        $conditions = array_merge($conditions, $scope);
                } elseif (is_string($scope)) {
                        $conditions = array($conditions, $scope);
                }
                if ($recursive === null) {
                        $recursive = $object->recursive;
                }
                $type = 'all';

                if (isset($defaults[0])) {
                        $type = array_shift($defaults);
                }
                $extra = array_diff_key($defaults, compact(
                        'conditions', 'fields', 'order', 'limit', 'page', 'recursive'
                ));
                if ($type !== 'all') {
                        $extra['type'] = $type;
                }

                if (method_exists($object, 'paginateCount')) {
                        $count = $object->paginateCount($conditions, $recursive, $extra);
                } else {
                        $parameters = compact('conditions');
                        if ($recursive != $object->recursive) {
                                $parameters['recursive'] = $recursive;
                        }
                        $count = $object->find('count', array_merge($parameters, $extra));
                }
                $pageCount = intval(ceil($count / $limit));

                if ($page === 'last' || $page >= $pageCount) {
                        $options['page'] = $page = $pageCount;
                } elseif (intval($page) < 1) {
                        $options['page'] = $page = 1;
                }

                if (method_exists($object, 'paginate')) {
                        $results = $object->paginate($conditions, $fields, $order, $limit, $page, $recursive, $extra);
                } else {
                        $parameters = compact('conditions', 'fields', 'order', 'limit', 'page');
                        if ($recursive != $object->recursive) {
                                $parameters['recursive'] = $recursive;
                        }
                        $results = $object->find($type, array_merge($parameters, $extra));
                }
                $paging = array(
                        'page'          => $page,
                        'current'       => count($results),
                        'count'         => $count,
                        'prevPage'      => ($page > 1),
                        'nextPage'      => ($count > ($page * $limit)),
                        'pageCount'     => $pageCount,
                        'defaults'      => array_merge(array('limit' => 20, 'step' => 1), $defaults),
                        'options'       => $options
                );
                $this->params['paging'][$object->alias] = $paging;

                if (!in_array('Paginator', $this->helpers) && !array_key_exists('Paginator', $this->helpers)) {
                        $this->helpers[] = 'Paginator';
                }
                return $results;
        }
/**
 * Called before the controller action.
 *
 * @access public
 * @link http://book.cakephp.org/view/60/Callbacks
 */
        function beforeFilter() {
        }
/**
 * Called after the controller action is run, but before the view is rendered.
 *
 * @access public
 * @link http://book.cakephp.org/view/60/Callbacks
 */
        function beforeRender() {
        }
/**
 * Called after the controller action is run and rendered.
 *
 * @access public
 * @link http://book.cakephp.org/view/60/Callbacks
 */
        function afterFilter() {
        }
/**
 * This method should be overridden in child classes.
 *
 * @param string $method name of method called example index, edit, etc.
 * @return boolean Success
 * @access protected
 * @link http://book.cakephp.org/view/60/Callbacks
 */
        function _beforeScaffold($method) {
                return true;
        }
/**
 * This method should be overridden in child classes.
 *
 * @param string $method name of method called either edit or update.
 * @return boolean Success
 * @access protected
 * @link http://book.cakephp.org/view/60/Callbacks
 */
        function _afterScaffoldSave($method) {
                return true;
        }
/**
 * This method should be overridden in child classes.
 *
 * @param string $method name of method called either edit or update.
 * @return boolean Success
 * @access protected
 * @link http://book.cakephp.org/view/60/Callbacks
 */
        function _afterScaffoldSaveError($method) {
                return true;
        }
/**
 * This method should be overridden in child classes.
 * If not it will render a scaffold error.
 * Method MUST return true in child classes
 *
 * @param string $method name of method called example index, edit, etc.
 * @return boolean Success
 * @access protected
 * @link http://book.cakephp.org/view/60/Callbacks
 */
        function _scaffoldError($method) {
                return false;
        }
}
?>