<?php
namespace ReCaptcha\RequestMethod;

use ReCaptcha\RequestMethod;
use ReCaptcha\RequestParameters;

/**
 * Sends POST requests to the reCAPTCHA service using the WP remote POST method
 */
class WP_remote implements RequestMethod
{
    /**
     * URL to which requests are POSTed.
     * @const string
     */
    const SITE_VERIFY_URL = 'https://www.google.com/recaptcha/api/siteverify';

    /**
     * Submit the POST request with the specified parameters.
     *
     * @param RequestParameters $params Request parameters
     * @return string Body of the reCAPTCHA response
     */
    public function submit(RequestParameters $params)
    {
    	$response = wp_remote_post( self::SITE_VERIFY_URL, array(
    			'method' => 'POST',
    			'body'   => $params->toQueryString(),
    	) );
    	
    	if ( ! is_wp_error( $response ) ) {
    		return wp_remote_retrieve_body( $response );
    	}
    	
    	// Alltough we try to decode json we will throw the error
    	throw $response->get_error_message();
    }
}