<?php

// $Id:





class FGApi {

  static private $instance = null;



  /**

   * We are implementing a singleton pattern

   */

  private function __construct() {

  }



  /**

   *

   * @return FGApi

   */

  public function getInstance() {

    if (is_null(self :: $instance)) {

      self :: $instance = new self;

    }

    return self :: $instance;

  }



  /**

   * filtering the params and checking if they are complete

   * @param array $params

   * @return array

   *  - status -> boolean if need params are available

   *  - params

   */

  public function transformParams($params) {

    $checkedParams = array();

    foreach ($params as $key => $item) {

      $checkedParams[$key] = check_plain($item);

    }

    if (!isset($checkedParams['type'])) {

      $checkedParams['type'] = 'html';

    }

    if (!isset($checkedParams['path'])) {

      return array('status' => FALSE, 'params' => $checkedParams);

    }

    if (!isset($checkedParams['gallery'])) {

      return array('status' => FALSE, 'params' => $checkedParams);

    }



    return array('status' => TRUE, 'params' => $checkedParams);

  }



  /**

   * the path alias needs to be transformed so it can be

   * matched onto the internal path to find the pictures

   * @param array $params

   * @return string

   */

  public function createFgGalleryPath($params) {

    $settings = variable_get('fg_galleries');



    //we first get the correct path, which depends on the path alias

    //then we put it together with the files path



    //remove slashed that are too much

    $ar_base_path = explode('/', $params['gallery']);

    if ($ar_base_path[count($ar_base_path)-1] == '') {

      unset($ar_base_path[count($ar_base_path)-1]);

    }

    if ($ar_base_path[0] == '') {

      unset($ar_base_path[0]);

    }

    $gallery = implode('/', $ar_base_path) . '/';





    $current_path_alias = $params['path'];

    $start = strlen($settings[$gallery]['fg_alias']);

    

    $path_new = substr($current_path_alias, ++$start);

    $path_new  = $settings[$gallery]['fg_path'] . $path_new;



    return $path_new;

  }

  /**

   * The main function for converting to an XML document.

   * Pass in a multi dimensional array and this recrusively loops through and builds up an XML document.

   *

   * @param array $data

   * @param string $rootNodeName - what you want the root node to be - defaultsto data.

   * @param SimpleXMLElement $xml - should only be used recursively

   * @return string XML

   */

  public function toXml($data, $rootNodeName = 'data', $xml=null) {

    if(empty($data)) {

      return false;

    }

    // turn off compatibility mode as simple xml throws a wobbly if you don't.

    if (ini_get('zend.ze1_compatibility_mode') == 1) {

      ini_set ('zend.ze1_compatibility_mode', 0);

    }



    if ($xml == null) {

      $xml = simplexml_load_string("<?xml version='1.0' encoding='utf-8'?><$rootNodeName />");

    }



    // loop through the data passed in.

    foreach($data as $key => $value) {

    // no numeric keys in our xml please!

      if (is_numeric($key)) {

      // make string key...

        $key = "unknownNode_". (string) $key;

      }



      // replace anything not alpha numeric

      $key = preg_replace('/[^a-z]/i', '', $key);



      // if there is another array found recrusively call this function

      if (is_array($value)) {

        $node = $xml->addChild($key);

        // recrusive call.

        $this->toXml($value, $rootNodeName, $node);

      }

      else {

      // add single node.

        $value = htmlentities($value);

        $xml->addChild($key,$value);

      }



    }

    // pass back as string. or simple xml object if you want!

    return $xml->asXML();

  }

}