1: <?php
  2: /**
  3:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
  4:  * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
  5:  *
  6:  * Licensed under The MIT License
  7:  * For full copyright and license information, please see the LICENSE.txt
  8:  * Redistributions of files must retain the above copyright notice.
  9:  *
 10:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 11:  * @link          http://cakephp.org CakePHP(tm) Project
 12:  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 13:  */
 14: 
 15: App::uses('View', 'View');
 16: App::uses('Xml', 'Utility');
 17: App::uses('Hash', 'Utility');
 18: 
 19: /**
 20:  * A view class that is used for creating XML responses.
 21:  *
 22:  * By setting the '_serialize' key in your controller, you can specify a view variable
 23:  * that should be serialized to XML and used as the response for the request.
 24:  * This allows you to omit views + layouts, if your just need to emit a single view
 25:  * variable as the XML response.
 26:  *
 27:  * In your controller, you could do the following:
 28:  *
 29:  * `$this->set(array('posts' => $posts, '_serialize' => 'posts'));`
 30:  *
 31:  * When the view is rendered, the `$posts` view variable will be serialized
 32:  * into XML.
 33:  *
 34:  * **Note** The view variable you specify must be compatible with Xml::fromArray().
 35:  *
 36:  * You can also define `'_serialize'` as an array. This will create an additional
 37:  * top level element named `<response>` containing all the named view variables:
 38:  *
 39:  * {{{
 40:  * $this->set(compact('posts', 'users', 'stuff'));
 41:  * $this->set('_serialize', array('posts', 'users'));
 42:  * }}}
 43:  *
 44:  * The above would generate a XML object that looks like:
 45:  *
 46:  * `<response><posts>...</posts><users>...</users></response>`
 47:  *
 48:  * If you don't use the `_serialize` key, you will need a view. You can use extended
 49:  * views to provide layout like functionality.
 50:  *
 51:  * @package       Cake.View
 52:  * @since         CakePHP(tm) v 2.1.0
 53:  */
 54: class XmlView extends View {
 55: 
 56: /**
 57:  * The subdirectory. XML views are always in xml.
 58:  *
 59:  * @var string
 60:  */
 61:     public $subDir = 'xml';
 62: 
 63: /**
 64:  * Constructor
 65:  *
 66:  * @param Controller $controller Controller instance.
 67:  */
 68:     public function __construct(Controller $controller = null) {
 69:         parent::__construct($controller);
 70: 
 71:         if (isset($controller->response) && $controller->response instanceof CakeResponse) {
 72:             $controller->response->type('xml');
 73:         }
 74:     }
 75: 
 76: /**
 77:  * Skip loading helpers if this is a _serialize based view.
 78:  *
 79:  * @return void
 80:  */
 81:     public function loadHelpers() {
 82:         if (isset($this->viewVars['_serialize'])) {
 83:             return;
 84:         }
 85:         parent::loadHelpers();
 86:     }
 87: 
 88: /**
 89:  * Render a XML view.
 90:  *
 91:  * Uses the special '_serialize' parameter to convert a set of
 92:  * view variables into a XML response. Makes generating simple
 93:  * XML responses very easy. You can omit the '_serialize' parameter,
 94:  * and use a normal view + layout as well.
 95:  *
 96:  * @param string $view The view being rendered.
 97:  * @param string $layout The layout being rendered.
 98:  * @return string The rendered view.
 99:  */
100:     public function render($view = null, $layout = null) {
101:         if (isset($this->viewVars['_serialize'])) {
102:             return $this->_serialize($this->viewVars['_serialize']);
103:         }
104:         if ($view !== false && $this->_getViewFileName($view)) {
105:             return parent::render($view, false);
106:         }
107:     }
108: 
109: /**
110:  * Serialize view vars.
111:  *
112:  * @param array $serialize The viewVars that need to be serialized.
113:  * @return string The serialized data
114:  */
115:     protected function _serialize($serialize) {
116:         $rootNode = isset($this->viewVars['_rootNode']) ? $this->viewVars['_rootNode'] : 'response';
117: 
118:         if (is_array($serialize)) {
119:             $data = array($rootNode => array());
120:             foreach ($serialize as $alias => $key) {
121:                 if (is_numeric($alias)) {
122:                     $alias = $key;
123:                 }
124:                 $data[$rootNode][$alias] = $this->viewVars[$key];
125:             }
126:         } else {
127:             $data = isset($this->viewVars[$serialize]) ? $this->viewVars[$serialize] : null;
128:             if (is_array($data) && Hash::numeric(array_keys($data))) {
129:                 $data = array($rootNode => array($serialize => $data));
130:             }
131:         }
132: 
133:         $options = array();
134:         if (Configure::read('debug')) {
135:             $options['pretty'] = true;
136:         }
137: 
138:         return Xml::fromArray($data, $options)->asXML();
139:     }
140: 
141: }
142: