<?php

class Wexo_Integration_Model_Xml_Parser extends Mage_Core_Model_Abstract {

    public $_adapterPublisher;

    protected $_xmlObject;
    protected $_entityTag = "product";
    protected $_xmlFilename = "";
    protected $_extension = ".xml";
    public $_processedFiles = array();
    public $_params = null;

    public function __construct( $params ) {
        if ( $params['entity_tag'] ) $this->_entityTag = $params['entity_tag'];
        if ( $params['xml_location'] ) $this->_xmlFilename = $params['xml_location'];
        if ( $params['extension'] ) $this->_extension = $params['extension'];
        $this->_entityTagPlural = $this->_entityTag . "s";
        parent::__construct();
    }

    protected function parseFile ( $filename ) {
        $this->_xmlObject = simplexml_load_file ( $filename ) ;
        if ( !$this->_xmlObject ) throw new Exception("Could not parse " . $this->_xmlFilename);
        if ( file_exists ( $filename . ".params" ) ) {
            $this->_params = json_decode(file_get_contents ( $filename . ".params"),true );
        }
        // try to find all nodes in the document matching the tag
        $entities = $this->_xmlObject->xpath( "//" . $this->_entityTag );
        if ( !$this->_parsedEntities ) $this->_parsedEntities = array();
        $this->_parsedEntities  = array_merge ( $this->_parsedEntities, $entities );
    }
    
    public function readCustomNamespace ( $prefix, $object, $name ) {
        $tmp = $object->xpath("//".$prefix.":" . $name);
        return $tmp[0];
    }

    public function parse() {
        if ( !$this->_xmlFilename ) throw new Exception("XML File is not specified.");
        if ( file_exists ( Mage::getBaseDir('base') . "/" . $this->_xmlFilename ) ) {
            $this->_xmlFilename = Mage::getBaseDir('base') . "/" . $this->_xmlFilename;
        }

        if ( is_dir ( $this->_xmlFilename )  ) {
            foreach ( glob ( $this->_xmlFilename . "/*" . $this->_extension ) as $filename ) {
                $this->parseFile( $filename );
                $this->_processedFiles []= $filename;
            }
        } else {
            $this->parseFile( $this->_xmlFilename );
            $this->_processedFiles []= $this->_xmlFilename;
        }
        return $this->_parsedEntities;
    }
}