/***************************************************************
*  Copyright notice
*
*  (c) 2007-2011 Stanislas Rolland <typo3(arobas)sjbr.ca>
*  All rights reserved
*
*  This script is part of the TYPO3 project. The TYPO3 project is
*  free software; you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation; either version 2 of the License, or
*  (at your option) any later version.
*
*  The GNU General Public License can be found at
*  http://www.gnu.org/copyleft/gpl.html.
*  A copy is found in the textfile GPL.txt and important notices to the license
*  from the author is found in LICENSE.txt distributed with these scripts.
*
*
*  This script is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*
*
*  This copyright notice MUST APPEAR in all copies of the script!
***************************************************************/
/*
 * Javascript functions for TYPO3 plugin freeCap (sr_freecap)
 *
 * TYPO3 CVS ID: $Id$
 */

/*
 * Loads a new freeCap image
 *
 * @param	string		id: identifier used to uniiquely identify the image
 *
 * @return	void
 */
function newFreeCap(id, noImageMessage) {
	if (document.getElementById) {
			// extract image name from image source (i.e. cut off ?randomness)
		var theImage = document.getElementById('tx_srfreecap_pi2_captcha_image_' + id);
		var parts = theImage.src.split('&set');
		theImage.src = parts[0] + '&set=' + Math.round(Math.random()*100000);
	} else {
		alert(noImageMessage ? noImageMessage : 'Sorry, we cannot autoreload a new image. Submit the form and a new image will be loaded.');
	}
}

/*
 * Plays the audio captcha
 *
 * @param	string		id: identifier used to uniquely identify the wav file
 * @param	string		wavURL: url of the wave file generating script
 *
 * @return	void
 *
 * Note: In order for this to work with IE8, [SYS][cookieDomain] must be set using the TYPO3 Install Tool
 */
function playCaptcha(id, wavURL, noPlayMessage) {
	if (document.getElementById) {
		var theAudio = document.getElementById('tx_srfreecap_pi2_captcha_playAudio_' + id);
		var url = wavURL + '&nocache=' + Math.random();
		while (theAudio.firstChild) {
			theAudio.removeChild(theAudio.firstChild);
		}
		var audioElement = document.createElement('audio');
		if (audioElement.canPlayType && (audioElement.canPlayType('audio/x-wav') === 'maybe' || audioElement.canPlayType('audio/x-wav') === 'probably')) {
			audioElement.setAttribute('id', 'tx_srfreecap_pi2_captcha_playAudio_audio' + id);
			audioElement.setAttribute('autoplay', 'autoplay');
			var sourceElement = document.createElement('source');
			sourceElement.setAttribute('type', 'audio/x-wav');
			sourceElement.setAttribute('src', url);
			audioElement.appendChild(sourceElement);
			theAudio.appendChild(audioElement);
		} else {
				// In IE, Windows Media Player should be the default player for audio WAVE
			var objectElement = document.createElement('object');
			objectElement.setAttribute('id', 'tx_srfreecap_pi2_captcha_playAudio_object' + id);
			objectElement.setAttribute('type', 'audio/x-wav');
			objectElement.setAttribute('data', url);
			objectElement.style.height = 0;
			objectElement.style.width = 0;
			try {
				objectElement.innerHTML = '<a href="' + url + '">' + (noPlayMessage ? noPlayMessage : 'Sorry, we cannot play the word of the image.') + '</a>';
			} catch (e) {
					// IE8 does not allow any element other than param as child of object
				objectElement.setAttribute('altHTML', '<a href="' + url + '">' + (noPlayMessage ? noPlayMessage : 'Sorry, we cannot play the word of the image.') + '</a>');
			}
			theAudio.appendChild(objectElement);
			var parameters = {
				src: url,
				autoplay: true,
				autoStart: true,
				controller: false
			};
			for (var parameter in parameters) {
				if (parameters.hasOwnProperty(parameter)) {
					var paramElement = document.createElement('param');
					paramElement.setAttribute('value', parameters[parameter]);
					paramElement.setAttribute('name', parameter);
					paramElement = objectElement.appendChild(paramElement);
				}
			}
		}
	} else {
		alert(noPlayMessage ? noPlayMessage : 'Sorry, we cannot play the word of the image.');
	}
}