<?php
/**
 * AfterShip API
 *
 * Handles parsing JSON request bodies and generating JSON responses
 *
 * @author      AfterShip
 * @category    API
 * @package     AfterShip/API
 * @since       1.0
 */

if (!defined('ABSPATH')) exit; // Exit if accessed directly

class AfterShip_API_JSON_Handler implements AfterShip_API_Handler
{

	/**
	 * Get the content type for the response
	 *
	 * @since 2.1
	 * @return string
	 */
	public function get_content_type()
	{

		return 'application/json; charset=' . get_option('blog_charset');
	}

	/**
	 * Parse the raw request body entity
	 *
	 * @since 2.1
	 * @param string $body the raw request body
	 * @return array|mixed
	 */
	public function parse_body($body)
	{

		return json_decode($body, true);
	}

	/**
	 * Generate a JSON response given an array of data
	 *
	 * @since 2.1
	 * @param array $data the response data
	 * @return string
	 */
	public function generate_response($data)
	{

		if (isset($_GET['_jsonp'])) {

			// JSONP enabled by default
			if (!apply_filters('aftership_api_jsonp_enabled', true)) {

				WC()->api->server->send_status(400);

				$data = array(array('code' => 'aftership_api_jsonp_disabled', 'message' => __('JSONP support is disabled on this site', 'aftership')));
			}

			// Check for invalid characters (only alphanumeric allowed)
			if (preg_match('/\W/', $_GET['_jsonp'])) {

				WC()->api->server->send_status(400);

				$data = array(array('code' => 'aftership_api_jsonp_callback_invalid', __('The JSONP callback function is invalid', 'aftership')));
			}

			return $_GET['_jsonp'] . '(' . json_encode($data) . ')';
		}

		return json_encode($data);
	}

}