After reading Chris Hartjes post in my previous thread, I thought I'd
take his empty xml component and add some code. Below is what I came
up with and I'm wondering what you guys think and whether something
like this fits within the cake paradigm.
<?php
class XMLComponent extends Object {
var $layout = 'xml';
var $enabled = true;
// This is so you can specify which nodes you do not want
// included in the XML.
var $excludedNodes = array();
var $version = '1.0';
var $encoding = 'UTF-8';
var $rowNameNode = '';
var $__domDocument = NULL;
function startup(&$controller) {
if (!$this->enabled || !( strtolower(
$controller->params['webservices'] ) == strtolower( 'xml' ))) {
return true;
}
$this->__domDocument = new DOMDocument( $this->version,
$this->encoding );
}
function buildXMLBody( $nodeName, $nodeValue ) {
$retval = NULL;
/**
* Using the 3rd argument because evidently if the needle
argument
* is a numeric 0, it will find it in the array somehow. Not
exactly sure
* why that's happening...
**/
if( !( in_array( $nodeName, $this->excludedNodes, TRUE ))) {
if( is_numeric( $nodeName )) {
// If I don't do this, the DOM throws an exception.
// Evidently, it doesn't like numbers as node names
$nodeName = $this->rowNameNode;
}
if( is_array( $nodeValue )) {
$domElement = $this->__domDocument->createElement( $nodeName
);
foreach( $nodeValue as $name => $value ) {
if( $node = $this->buildXMLBody( $name, $value )) {
$domElement->appendChild( $node );
}
}
} else {
$domElement = $this->__domDocument->createElement( $nodeName
);
$domElement->appendChild(
$this->__domDocument->createTextNode( htmlentities( $nodeValue )));
}
$retval = $domElement;
}
return $retval;
}
function dataToXML( $dataArray, $rootNodeName = 'root',
$rowNameNode = 'row' ) {
$retval = NULL;
$this->rowNameNode = $rowNameNode;
$rootNode = $this->__domDocument->createElement( $rootNodeName );
foreach( $dataArray as $nodeName => $nodeValue ) {
if( $domElement = $this->buildXMLBody( $nodeName, $nodeValue ))
{
$rootNode->appendChild( $domElement );
}
}
$this->__domDocument->appendChild( $rootNode );
$retval = $this->__domDocument->saveXML( NULL, LIBXML_NOEMPTYTAG
);
return $retval;
}
}
?>
and here is my controller:
class UsersController extends AppController {
var $name = 'Users';
/**
* I don't need to include Xml here. It's being including
* by something else within CakePHP.
* #shrug#
* Is that right? Should it be doing that? I'm not including
* it in the $components array in my app_controller.php
* file...
**/
var $components = array();
function index() {
$this->User->recursive = -1;
if( strtolower( $this->params['webservices'] ) == strtolower( 'xml'
)) {
$this->Xml->excludedNodes = array_merge(
$this->Xml->excludedNodes, array( 'id', 'password', 'role', 'email' ));
$this->set('users', $this->Xml->dataToXML(
$this->User->findAll(), 'users' ));
} else {
// Snip
// Do regular index-y stuff here
}
}
}
What do you guys think? Am I going about this all the wrong way? I
figured that putting this code in the component would allow any of the
other controllers that want to use the XML webservice a mechanism to
transform it's data into XML. Should this functionality be moved to
the helper instead? Is that were it's better suited?
thnx,
Christoph
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