<?php
// $Id: json_server.module,v 1.8.2.1 2008/01/13 16:12:23 dmitrig01 Exp $

function json_server_server_info() {
  return array(
    '#name' => 'JSON',
    '#path' => 'json',
  );
}

function json_server_server_error($message) {
  return array('error' => TRUE, 'message' => $message);
}

function json_server_server() {
  // JSON callback is used by jQuery to do crossdomain requests
  $json_callback = $_GET['jsoncallback'];
  $method = '';
  $params = array();
  
  // Check the request type and keep it's values
  if ($_GET['method'] != '') {
    $method = $_GET['method'];
    unset($_GET['q'], $_GET['method'], $_GET['jsoncallback'], $_GET['_']);
    $params = $_GET;
  } else {
    if ($_POST['method'] != '') {
      $method = $_POST['method'];
      unset($_POST['q'], $_POST['method']);
      $params = $_POST;
    }
  }

  // Find the service and process the service call
  foreach (services_get_all() as $service) {
    if ($service['#method'] == $method) {
      $args = array();
      foreach($service['#args'] as $arg) {
        $args[] = $params[$arg['#name']];
      }

      $result = services_method_call($service['#method'], $args);
      if (is_array($result) && $result['error']) {
        return _json_server_send(array('status' => FALSE, 'data' => $result['message']), $json_callback);
      }

      return _json_server_send(array('status' => TRUE, 'data' => $result), $json_callback);
    }
  }

  $error = services_error("Invalid method $method");
  return _json_server_send($error, $json_callback);
}

/**
 * Return the correct JSON structure.
 *
 * This function converts data to JSON, obeying the callback information.
 * The Callback is required to bypass crossdomain check by the browser with the
 * jQuery getJSON support.
 */
function _json_server_send($data, $callback = '') {
  $data = drupal_to_js($data);
  if ($callback != '') $data = "$callback($data)";
  return $data;
}