<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Openstreetmap
 *
 * @copyright   Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die();

/**
 * Openstreetmap API object class for the Joomla Platform
 *
 * @package     Joomla.Platform
 * @subpackage  Openstreetmap
 * @since       13.1
 */
abstract class JOpenstreetmapObject
{
	/**
	 * Options for the Openstreetmap object.
	 *
	 * @var    JRegistry
	 * @since  13.1
	 */
	protected $options;

	/**
	 * The HTTP client object to use in sending HTTP requests.
	 *
	 * @var    JHttp
	 * @since  13.1
	 */
	protected $client;

	/**
	 * The OAuth client.
	 *
	 * @var    JOpenstreetmapOauth
	 * @since  13.1
	 */
	protected $oauth;

	/**
	 * Constructor
	 *
	 * @param   JRegistry            &$options  Openstreetmap options object.
	 * @param   JHttp                $client    The HTTP client object.
	 * @param   JOpenstreetmapOauth  $oauth     Openstreetmap oauth client
	 *
	 * @since   13.1
	 */
	public function __construct(JRegistry &$options = null, JHttp $client = null, JOpenstreetmapOauth $oauth = null)
	{
		$this->options = isset($options) ? $options : new JRegistry;
		$this->client = isset($client) ? $client : new JHttp($this->options);
		$this->oauth = $oauth;
	}

	/**
	 * Get an option from the JOpenstreetmapObject instance.
	 *
	 * @param   string  $key  The name of the option to get.
	 *
	 * @return  mixed  The option value.
	 *
	 * @since   13.1
	 */
	public function getOption($key)
	{
		return $this->options->get($key);
	}

	/**
	 * Set an option for the JOpenstreetmapObject instance.
	 *
	 * @param   string  $key    The name of the option to set.
	 * @param   mixed   $value  The option value to set.
	 *
	 * @return  JOpenstreetmapObject  This object for method chaining.
	 *
	 * @since   13.1
	 */
	public function setOption($key, $value)
	{
		$this->options->set($key, $value);

		return $this;
	}

	/**
	 * Method to send the request which does not require authentication.
	 *
	 * @param   string  $path     The path of the request to make
	 * @param   string  $method   The request method.
	 * @param   array   $headers  The headers passed in the request.
	 * @param   mixed   $data     Either an associative array or a string to be sent with the post request.
	 *
	 * @return  SimpleXMLElement  The XML response
	 *
	 * @since   13.1
	 * @throws  DomainException
	 */
	public function sendRequest($path, $method = 'GET', $headers = array(), $data = '')
	{
		// Send the request.
		switch ($method)
		{
			case 'GET':
				$response = $this->client->get($path, $headers);
				break;

			case 'POST':
				$response = $this->client->post($path, $data, $headers);
				break;
		}

		// Validate the response code.
		if ($response->code != 200)
		{
			$error = htmlspecialchars($response->body);

			throw new DomainException($error, $response->code);
		}

		$xml_string = simplexml_load_string($response->body);

		return $xml_string;
	}
}