<?php

/**
 * Class which implements the SOAP binding.
 *
 * @package simpleSAMLphp
 * @version $Id$
 */
class SAML2_SOAP extends SAML2_Binding {

	/**
	 * Send a SAML 2 message using the SOAP binding.
	 *
	 * Note: This function never returns.
	 *
	 * @param SAML2_Message $message  The message we should send.
	 */
	public function send(SAML2_Message $message) {
		header('Content-Type: text/xml',true);
		$outputFromIdp = '<?xml version="1.0" encoding="UTF-8"?>';
		$outputFromIdp .= '<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">';
		$outputFromIdp .= '<SOAP-ENV:Body>';
		$xmlMessage = $message->toSignedXML();
		SimpleSAML_Utilities::debugMessage($xmlMessage, 'out');
		$tempOutputFromIdp = $xmlMessage->ownerDocument->saveXML($xmlMessage);
		$outputFromIdp .= $tempOutputFromIdp;
		$outputFromIdp .= '</SOAP-ENV:Body>';
		$outputFromIdp .= '</SOAP-ENV:Envelope>';
		print($outputFromIdp);
		exit(0);
	}


	/**
	 * Receive a SAML 2 message sent using the HTTP-POST binding.
	 *
	 * Throws an exception if it is unable receive the message.
	 *
	 * @return SAML2_Message  The received message.
	 */
	public function receive() {

		$postText = file_get_contents('php://input');

		if(empty($postText)){
			throw new SimpleSAML_Error_BadRequest('Invalid message received to AssertionConsumerService endpoint.');
		}

		$document = new DOMDocument();
		$document->loadXML($postText);
		$xml = $document->firstChild;
		SimpleSAML_Utilities::debugMessage($xml, 'in');
		$results = SAML2_Utils::xpQuery($xml, '/soap-env:Envelope/soap-env:Body/*[1]');
		return SAML2_Message::fromXML($results[0]);
	}

}