Serializing find("threaded") data to XML

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By rreyes
Ever tried to serialize a full find("threaded") tree to XML? Well, it won't be easy to consume. Unless you give a try with XMLTreeHelper.

Usage


Controller Class:

<?php 
class NodesController extends AppController {
    
    var $name = 'Nodes';
    var $components = array('RequestHandler');
    var $helpers = array("Xmltree");
    
    function index() {
        $data = $this->Node->find("threaded", array("order" => "lft", "contain" => false));
        $this->set("objects", $data);
    }
}
?>

View Template:


<data>
    <?php 
        echo $xmltree->serialize($objects, "Node"); 
    ?>
</data>

Code

Helper Class:

<?php 
    class XmltreeHelper extends AppHelper {
        var $helpers = array('Xml');
         
        function serialize($treeData, $containerName = NULL){
            debug($treeData);
            $this->normalize($treeData, $containerName);
            return $this->Xml->serialize($treeData);
        }
         
        function normalize(&$children, $containerName){
            if(sizeof($children) > 0){
                foreach($children as &$node){
                    $this->normalize($node["children"], $containerName);
    
                    if(sizeof($node["children"]) > 0){
                        $node[$containerName][$containerName] = array();
                            
                        foreach($node["children"] as &$child){
                            $node[$containerName][$containerName][] = $child[$containerName];
                        }
                    }
    
                    unset($node["children"]);
                }
            }
        }
         
    }
?>

Comments

  • burak
    Posted 10/09/09 09:31:12 AM
    I have modified this helper to filter the fields that gets printed. Even though the fields can be limited through the model with "fields", some fields are necessary to get the tree structure (ie. lft, rght, parent_id, id) and you might not want them in the XML so with the modification below you can limit the fields to be printed.

    Helper Class:

    <?php 
    <?php 
            class XmltreeHelper extends AppHelper {
            var     $helpers = array('Xml');
            var     $fields=null;
             
            function     serialize($treeData, $containerName = NULL,$fields=null){
                    $this->fields=$fields;
                    $this->normalize($treeData, $containerName);
                return     $this->Xml->serialize($treeData);
            }
             
            function     normalize(&$children, $containerName){
                if(    sizeof($children) > 0){
                    foreach(    $children as &$node){
                            $this->normalize($node["children"], $containerName);
        
                        if(    sizeof($node["children"]) > 0){
                                $node[$containerName][$containerName] = array();
                                
                            foreach(    $node["children"] as &$child){
                                    $node[$containerName][$containerName][] = $child[$containerName];
                            }
                        }
        
                        unset(    $node["children"]);
                        if(!    is_null($this->fields)){
                            foreach(    $node[$containerName] as $field=>$value){
                                if(!    in_array($field,$this->fields) && $field!=$containerName){
                                    unset(    $node[$containerName][$field]);
                                }
                            }
                        }
                    }
                }
            }
             
        }
    ?>
    ?>
    Report this
  • Darren
    Posted 03/11/09 07:40:53 AM
    Could you perhaps post an example of output?
    Report this

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