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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
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
App::uses('View', 'View');
App::uses('Xml', 'Utility');
/**
* A view class that is used for creating XML responses.
*
* By setting the '_serialize' key in your controller, you can specify a view variable
* that should be serialized to XML and used as the response for the request.
* This allows you to omit views + layouts, if your just need to emit a single view
* variable as the XML response.
*
* In your controller, you could do the following:
*
* `$this->set(array('posts' => $posts, '_serialize' => 'posts'));`
*
* When the view is rendered, the `$posts` view variable will be serialized
* into XML.
*
* **Note** The view variable you specify must be compatible with Xml::fromArray().
*
* You can also define `'_serialize'` as an array. This will create an additional
* top level element named `<response>` containing all the named view variables:
*
* {{{
* $this->set(compact('posts', 'users', 'stuff'));
* $this->set('_serialize', array('posts', 'users'));
* }}}
*
* The above would generate a XML object that looks like:
*
* `<response><posts>...</posts><users>...</users></response>`
*
* If you don't use the `_serialize` key, you will need a view. You can use extended
* views to provide layout like functionality.
*
* @package Cake.View
* @since CakePHP(tm) v 2.1.0
*/
class XmlView extends View {
/**
* The subdirectory. XML views are always in xml.
*
* @var string
*/
public $subDir = 'xml';
/**
* Constructor
*
* @param Controller $controller
*/
public function __construct(Controller $controller = null) {
parent::__construct($controller);
if (isset($controller->response) && $controller->response instanceof CakeResponse) {
$controller->response->type('xml');
}
}
/**
* Render a XML view.
*
* Uses the special '_serialize' parameter to convert a set of
* view variables into a XML response. Makes generating simple
* XML responses very easy. You can omit the '_serialize' parameter,
* and use a normal view + layout as well.
*
* @param string $view The view being rendered.
* @param string $layout The layout being rendered.
* @return string The rendered view.
*/
public function render($view = null, $layout = null) {
if (isset($this->viewVars['_serialize'])) {
return $this->_serialize($this->viewVars['_serialize']);
}
if ($view !== false && $viewFileName = $this->_getViewFileName($view)) {
return parent::render($view, false);
}
}
/**
* Serialize view vars
*
* @param array $serialize The viewVars that need to be serialized
* @return string The serialized data
*/
protected function _serialize($serialize) {
$rootNode = isset($this->viewVars['_rootNode']) ? $this->viewVars['_rootNode'] : 'response';
if (is_array($serialize)) {
$data = array($rootNode => array());
foreach ($serialize as $key) {
$data[$rootNode][$key] = $this->viewVars[$key];
}
} else {
$data = isset($this->viewVars[$serialize]) ? $this->viewVars[$serialize] : null;
if (is_array($data) && Set::numeric(array_keys($data))) {
$data = array($rootNode => array($serialize => $data));
}
}
return Xml::fromArray($data)->asXML();
}
}
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