/* YetAnotherShoutBox AJAX Javascript
 * author: Thomas Lorenz
 * Version: 1.1.1
 * http://www.freudeamgolfen.de
 */

//define the local vars
var YaSBLoadTimes = 1;
var YaSBGetUrl = "";
var YaSBSendUrl = "";
var httpReceiveChat = getHTTPObject();
var httpSendChat = getHTTPObject();
var YaSBSound = false;
var YaSBto = 0;
var YaSBsmilyWindow;

//define the date which will be used for requests
theDate = new Date();
var expiryDate = new Date( theDate.getTime() + 5184000000 ).toGMTString();

//setup onload function
if(typeof window.addEventListener != 'undefined'){	//.. gecko, safari, konqueror and standard
	window.addEventListener('load', initYaSB, false);
}
else if(typeof document.addEventListener != 'undefined'){	//.. opera 7
	document.addEventListener('load', initYaSB, false);
}
else if(typeof window.attachEvent != 'undefined'){	//.. win/ie
	window.attachEvent('onload', initYaSB);
}

/**
 * Init the YaSB AJAX Scripts
 */
function initYaSB() {
	if (!document.getElementById('yasbText')) { return; }
	document.getElementById('yasbText').setAttribute('autocomplete','off'); //this non standard attribute prevents firefox' autofill function to clash with this script
	if(document.getElementById('yasbCheck')){
		document.getElementById('yasbCheck').setAttribute('autocomplete','off');
	}
	// initiate the vars that have not been initiated
	yasbSound =  YaSBgetCookie("yasbSound")==1; //No sound by default
	YaSBGetUrl = YaSBroot + "index.php?yasbtask=getshouts";
	YaSBSendUrl = YaSBroot + "index.php?yasbtask=addshout";
	YaSBto = YaSBrefresh;
	
	document.getElementById('yasbName').onblur = YaSBcheckName;
	document.getElementById('yasbSubmit').onclick = YaSBsendShout;
    document.getElementById('yasbChatForm').onsubmit = function () { return false; }
	// When user mouses over shoutbox
    document.getElementById('chatoutput').onmouseover = function () {
    	if (YaSBLoadTimes > 9) {
    		YaSBLoadTimes = 1;
			YaSBquery();
    	}
    	YaSBto = YaSBrefresh;
    }
	
    YaSBreloadCaptcha();
	YaSBcheckName(); //checks the initial value of the input name
	setTimeout('YaSBquery()', YaSBto); //initiates the first data query
}

/**
 * Query the server for new messages
 */
function YaSBquery() {
	latest = parseInt(document.getElementById('yasbID').value);
	if (httpReceiveChat.readyState == 4 || httpReceiveChat.readyState == 0) {
  		httpReceiveChat.open("GET",YaSBGetUrl + '&yasbID=' + latest + '&rand='+Math.floor(Math.random() * 1000000), true);
		httpReceiveChat.onreadystatechange = YaSBHandleChatRecive; 
  		httpReceiveChat.send(null);
		YaSBLoadTimes++;
	    if (YaSBLoadTimes > 9) YaSBto = YaSBto * 5 / 4;
	}
    setTimeout('YaSBquery()',YaSBto);
}

/**
 * Handle the AJAX server answer when recieveing new shouts
 */
function YaSBHandleChatRecive() {
	if (httpReceiveChat.readyState == 4) {
		results = httpReceiveChat.responseText.split('----'); 
		if (results.length >= 5) {
			for(i=0;i < (results.length-1);i=i+5) {
				YaSBInsertShout(results[i+1], results[i+2], results[i+3] , results[i+4]);
				document.getElementById('yasbID').value = parseInt(results[i]);
				document.getElementById('yasbTime').value = parseInt(results[i+4]);
			}
			YaSBto = YaSBrefresh;
			YaSBLoadTimes = 1;
			YaSBnotify();
		}
		YaSBUpdateLatestPost();
	}
}

/**
 * Insert a new shout at the begin of the list
 * @param uid the user id of the poster
 * @param Name the poster's name
 * @param Text the text
 * @param Time the timestamp the post has been send
 */
function YaSBInsertShout(uid,name,text, time) {
	insertO = document.getElementById("outputList");
	oLi = document.createElement('li');
	oSpan = document.createElement('span');
	oSpan.setAttribute('class','uname');
	oSpan.setAttribute('title',YaSBstrftime(time));
	
	oName = document.createTextNode(name);
	
	if (uid != 0) {
		oURL = document.createElement('a');
		oURL.href = 'index.php?option=com_comprofiler&task=userProfile&user='+uid;
		oURL.appendChild(oName);
	} else {
		oURL = oName;
	}
	
	oSpan.appendChild(oURL);
	oSpan.appendChild(document.createTextNode(' : '));
	oLi.appendChild(oSpan);
	oLi.innerHTML += text;
	insertO.insertBefore(oLi, insertO.firstChild);
}

/**
 * Format a Unix timestamp into human readable string
 * @param time Unix time stamp
 * @return String the human readable time
 */
function YaSBstrftime(time){
	myDate = new Date(time * 1000);
	ret = '';
	if( myDate.getDate().toString().length < 2 ){
		ret = ret + '0' + myDate.getDate().toString() + '.';
	}else{
		ret = ret + myDate.getDate().toString() + '.';
	}
	if( (myDate.getMonth()+1).toString().length < 2 ){
		ret = ret + '0' + (myDate.getMonth()+1).toString() + '.';
	}else{
		ret = ret + (myDate.getMonth()+1).toString() + '.';
	}
	ret = ret + myDate.getFullYear().toString().substring(2);
	ret = ret + ' - ';
	if( myDate.getHours().toString().length < 2 ){
		ret = ret + '0' + myDate.getHours().toString() + ':';
	}else{
		ret = ret + myDate.getHours().toString() + ':';
	}
	if( myDate.getMinutes().toString().length < 2 ){
		ret = ret + '0' + myDate.getMinutes().toString();
	}else{
		ret = ret + myDate.getMinutes().toString();
	}
	return ret;
}

/**
 * Update the time displayes in the top of the shoutbox.
 * @return void
 */
function YaSBUpdateLatestPost(){
	//Get the time in seconds the last post is away
	now = new Date();
	last = parseInt(document.getElementById('yasbTime').value)-10;
	timeSince = Math.floor((now.getTime()/1000)-last);
	if(timeSince<0){
		timeSince = 0;
	}

	//figure out the first component of the strings
	for(i = 0;i < YaSBlanTime.length; i++){
		val = parseInt(YaSBlanTime[i][0]);
		name = YaSBlanTime[i][1];
		names = YaSBlanTime[i][2];
		count = Math.floor(timeSince/val);
		if(count > 0){
			break;
		}
	}

	retStr = (count==1)?('1 '+name):(count.toString()+' '+names);
	//the second part
	if( i+1 < YaSBlanTime.length ){
		val2 = parseInt(YaSBlanTime[i+1][0]);
		name2 = YaSBlanTime[i+1][1];
		names2 = YaSBlanTime[i+1][2];
		count2 = Math.floor((timeSince-(val*count))/val2);
		if(count2 > 0){
			retStr = retStr + ', ' + ( (count2==1) ? ('1 '+name2) : (count2.toString()+' '+names2) );
		}
	}
		
	retStr = retStr + ' ' + YaSBlanTimeSince;
	
	response = document.getElementById("responseTime");
	response.innerHTML = retStr;
}

/**
 * Play the sound applet if it is to find
 * @return void
 */
function YaSBnotify(){
	media = document.getElementById('yasbMedia');
	if (Boolean(media) && YaSBSound && navigator.javaEnabled()){
		media.play();
	}
}

/**
 * Parse the user entered values and send the shout to the server
 * @return void
 */
function YaSBsendShout() {
	if(document.images.captImg){
		if(document.forms['yasbChatForm'].elements['yasbCheck'].value == ''){
			alert(YaSBlanCaptWarning);
			return;
		}
	}

	currentChatText = document.getElementById('yasbText').value;
	if (currentChatText == ''){ return; }
	if (httpSendChat.readyState == 4 || httpSendChat.readyState == 0) {
		currentName = document.getElementById('yasbName').value;
		param = 'yasbName='+ encodeURIComponent(currentName)+'&yasbText='+ encodeURIComponent(currentChatText);
		if(document.images.captImg){
			param = param + '&yasbCode='  + document.getElementById('yasbCode').value;
			param = param + '&yasbCheck=' + document.getElementById('yasbCheck').value;
		}
		httpSendChat.open("POST", YaSBSendUrl, true);
		httpSendChat.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
		httpSendChat.onreadystatechange = YaSBHandleSendChat;
		httpSendChat.send(param);
	}
	YaSBcheckName();
}

/**
 * Handle the server's answer when sending a shout
 * @return void
 */
function YaSBHandleSendChat(){
	if (httpSendChat.readyState == 4) {
		error = httpSendChat.responseText;
		if(error != ''){
			if( document.getElementById("chatError") ){
				document.getElementById("chatError").innerHTML = error;
			}else{
				pElem = document.createElement('p');
				pElem.setAttribute('id', 'chatError');
				pElem.innerHTML = error;
				document.getElementById('yasbChatForm').insertBefore(
						pElem,
						document.getElementById('yasbChatForm').firstChild);
			}
		}else{
			if(document.getElementById('chatError')){
				document.getElementById('yasbChatForm').removeChild(
						document.getElementById('chatError'));
			}
		}
		document.getElementById('yasbText').value = '';
		YaSBreloadCaptcha();
		YaSBquery();
	}
}

/**
 * Reload the Captcha image with a new value if the image tag exists
 * @return void
 */
function YaSBreloadCaptcha(){
	if(!document.images.captImg){return;}
	code = Math.floor(Math.random()*511)+2;
	img = YaSBbase + "media/captcha.php?code=" + code;
	img = img + "&d=" + Math.floor(Math.random()*10000);
	document.images.captImg.src = img;
	document.getElementById('yasbCode').value = code;
	document.getElementById('yasbCheck').value = '';
}

/**
 * Switch sound notifications on or off depending on the current state
 * @return void
 */
function YaSBtoggleSound(){
	//get the new sound prederences
	YaSBSound = (YaSBgetCookie("yasbSound")!=1);
	if( YaSBSound ){
		if(navigator.javaEnabled()){
			document.cookie = "yasbSound=1;expires="+expiryDate+";path=/;";
			document.getElementById('yasbSoundSwitch').src = YaSBbase+"media/sound_1.gif";
			document.getElementById('yasbMediaCnt').innerHTML = '<applet code="SoundPlayer.class" codebase="'+YaSBbase+'media/" id="yasbMedia" width="0" height="0">'+
				'<param name="SoundFileName" value="'+YaSBbase+'media/msg.wav" />'+
				'</applet>';
		}else{
			alert(YaSBlanJavaWarning);
			document.getElementById('yasbSoundSwitch').src = YaSBbase+"media/sound_0.gif";
		}
	}else{
		document.cookie = "yasbSound=0;expires="+expiryDate+";path=/;";
		document.getElementById('yasbSoundSwitch').src = YaSBbase+"media/sound_0.gif";
		container = document.getElementById('yasbMediaCnt');
		while(container.hasChildNodes()){
			container.removeChild(container.firstChild);
		}
	}
}

/**
 * Guess the Name of the shouter, if a user enters an own name, use that
 * @return void
 */
function YaSBcheckName() {
	
	nameCookie = YaSBgetCookie('yasbName');
	nameField = document.getElementById('yasbName');
		
	if (nameCookie && nameField.value == '') {
		nameField.value = nameCookie;
		return;
	}
	
	if (nameField.value == '') {
		nameField.value = 'guest_'+ Math.floor((Math.random() * 9000) + 1000);
	}
	
	if (nameField.value != nameCookie) {
		document.cookie = "yasbName="+nameField.value+";expires="+expiryDate+";path=/";
	}
}

/**
 * Handle the pessed enter event in the text or captcha field
 * @param field a reference to the field
 * @param event the event stranmitted
 * @return boolen true if nothing was done
 */
function YaSBEnter(field,event) {
	var theCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
	if (theCode == 13) {
		//Enter was pressed
		if( document.images.captImg ){
			if(document.getElementById('yasbCheck').value == ''){
				document.getElementById('yasbCheck').focus();
				return false;
			}else if(document.getElementById('yasbText').value == ''){
				document.getElementById('yasbText').focus();
				return false;
			}else{
				YaSBsendShout();
				return false;
			}
		}else{
			YaSBsendShout();
			return false;
		}
	} 
	else return true;
}

/**
 * Return the value of the cookie with the name 'name'
 * @param name string the cookie's name
 * @return string the cookie's value
 */
function YaSBgetCookie(name) {
	var dc = document.cookie;
	var prefix = name + "=";
	var begin = dc.indexOf("; " + prefix);
	if (begin == -1) {
		begin = dc.indexOf(prefix);
		if (begin != 0) return null;
	}else{
	    begin += 2;
	}
	var end = document.cookie.indexOf(";", begin);
	if (end == -1){
		end = dc.length;
	}
	return unescape(dc.substring(begin + prefix.length, end));
}

function YaSBSmilies(){
	if(!YaSBsmilyList){return;}

	if (YaSBsmilyWindow){
		YaSBsmilyWindow.close();
	}
	YaSBsmilyWindow = window.open("", "add_smileys", "toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,width=500,height=600,resizable=yes,dependent=yes");
	YaSBsmilyWindow.document.write('<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">\n<html>');
	YaSBsmilyWindow.document.write('\n\t<head>\n\t\t<title>Emoticons</title>\n\t\t <style>\n\t\t.tborder\n\t\t\t{\n\t\t\t\t\tborder-top: solid  1px #454545;\n\t\t\t\t\tborder-left: solid 1px #454545;\n\t\t\t\t\tborder-right: solid  1px black;\n\t\t\t\t\tborder-bottom: solid 1px black;\n\t\t\t\t\tbackground-color: #ffffff;\n\t\t\t\t\tpadding: 0px;\n\t\t\t\t\tborder-collapse:collapse;\n\t\t\t}\n\t\tbody\n\t\t\t{\n\t\t\t\t\tbackground-color: #cccccc;\n\t\t\t\t\tmargin: 0px;\n\t\t\t\t\tpadding: 5px 20px 5px 20px;\n\t\t\t}\n\t\tbody, td\n\t\t\t{\n\t\t\t\t\tcolor: #ffffff;\n\t\t\t\t\tfont-size: small;\n\t\t\t\t\tfont-family: tahoma, helvetica, serif;\n\t\t\t}\n\t\t.titlebg, tr.titlebg td\n\t\t\t{\n\t\t\t\t\tbackground-color: #333333;\n\t\t\t\t\tfont-weight: bold;\n\t\t\t\t\tcolor: #eeeeee;\n\t\t\t\t\tfont-style: normal;\n\t\t\t}\n\t\t.windowbg\n\t\t\t{\n\t\t\t\t\tfont-family: tahoma, helvetica, serif;\n\t\t\t\t\tcolor: #ffffff;\n\t\t\t\t\tbackground-color: #eeeeee;\n\t\t\t\t\tborder-top: solid  1px #606060;\n\t\t\t\t\tborder-left: solid 1px #606060;\n\t\t\t\t\tborder-right: solid  1px black;\n\t\t\t\t\tborder-bottom: solid 1px black;\n\t\t\t}\n\t\t</style> \n\t</head>');
	YaSBsmilyWindow.document.write('\n\t<body style="margin: 1ex;">\n\t\t<table width="100%" cellpadding="5" cellspacing="0" border="0" class="tborder">\n\t\t\t<tr class="titlebg"><td align="left">'+YaSBlanChoose+'</td></tr>\n\t\t\t<tr class="windowbg"><td align="left">');

	for (i = 0; i < YaSBsmilyList.length; i++)
	{
		YaSBsmilyList[i][2] = YaSBsmilyList[i][0].replace(/"/g, '&quot;');
		YaSBsmilyWindow.document.write('<a href="javascript:void(0);" onclick="window.opener.YaSBinsrtSmily(&quot; ' + YaSBsmilyList[i][0] + '&quot;); window.focus(); return false;"><img src="' + YaSBbase + 'smilies/' + YaSBsmilyList[i][1] + '" alt="' + YaSBsmilyList[i][2] + '" title="' + YaSBsmilyList[i][2] + '" style="padding: 4px;" border="0" /></a> ');
	}
	YaSBsmilyWindow.document.write("<br />");

	YaSBsmilyWindow.document.write('</td></tr>\n\t\t\t<tr><td align="center" class="windowbg"><a href="javascript:window.close();\">'+YaSBlanClose+'</a></td></tr>\n\t\t</table>\n\t</body>\n</html>');
	YaSBsmilyWindow.document.close();
	YaSBsmilyWindow.focus();	
}

function YaSBinsrtSmily(smily){
	textarea = document.getElementById('yasbText');
	if(!textarea){return;}
	if (typeof(textarea.caretPos) != "undefined" && textarea.createTextRange){// Attempt to create a text range (IE).
		var caretPos = textarea.caretPos;
		caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? smily + ' ' : smily;
		caretPos.select();
	}
	
	else if (typeof(textarea.selectionStart) != "undefined"){// Mozilla text range replace.
		var begin = textarea.value.substr(0, textarea.selectionStart);
		var end = textarea.value.substr(textarea.selectionEnd);
		var scrollPos = textarea.scrollTop;

		textarea.value = begin + smily + end;
		if (textarea.setSelectionRange){
			textarea.focus();
			textarea.setSelectionRange(begin.length + smily.length, begin.length + smily.length);
		}
		textarea.scrollTop = scrollPos;
	}else{// Just put it on the end.
		textarea.value += text;
		textarea.focus(textarea.value.length - 1);
	}
}

/**
 * Switch the visibiliy of the help content on or off depending on the current settings
 * @param obj the parant element of the ToggleHelp
 * @return void
 */
function YaSBtoggleHelp(obj){
	if(obj.getElementById('bbHelpContent').style.display=='none'){
		obj.getElementById('bbHelpContent').style.display='';
	}else{
		obj.getElementById('bbHelpContent').style.display='none';
	}
}

function YaSBbbCode(code){
	textarea = document.getElementById('yasbText');
	if(!textarea){return}
	colDef = false;
	if(code.indexOf('=') > -1){
		code = code.substring(0, code.indexOf('=') );
		colDef = true;
	}

	if (typeof(document.selection) != "undefined"){// Attempt to create a text range (IE).
		textarea.focus ();
		start = -document.selection.createRange().text.length;
		Sel = document.selection.createRange ();
		Sel.moveStart ('character', -textarea.value.length);
		stop = Sel.text.length;
		start += stop;
		text = textarea.value;
		textarea.value = text.substring(0, start) + "["+code+(colDef?"=":"")+"]"+
					text.substring(start,stop) + "[/" + code+ "]"+
					text.substring(stop);
		range = textarea.createTextRange();
		if(colDef || start==stop){
			CPos = start + 2 + code.length;
		}else{
			CPos = start + 7 + 2*code.length;
		}
		range.collapse(true);
		range.moveEnd('character', CPos);
		range.moveStart('character', CPos);
		range.select();
	}else if (typeof(textarea.selectionStart) != "undefined"){// Mozilla text range replace.
		selStart = textarea.selectionStart;
		selStop = textarea.selectionEnd;
		begin = textarea.value.substring(0, selStart);
		middle = textarea.value.substring(selStart,selStop);
		end = textarea.value.substring(selStop);
		scrollPos = textarea.scrollTop;
		textarea.value = begin + "[" + code;
		if(colDef){textarea.value = textarea.value + "=";}
		textarea.value = textarea.value  + "]" + middle + "[/" + code + "]" + end;
		textarea.scrollTop = scrollPos;
		textarea.focus();
		if(colDef || middle.length == 0){
			CPos = selStart + 2 + code.length
		}else{
			CPos = selStop + 5 + 2 * code.length
		}
		textarea.setSelectionRange(CPos,CPos);
	}else{// Just put it on the end.
		textarea.value += "[" + code + (colDef?'=':'') + "][/" + code + "]";
		textarea.focus();
	}
}

/**
 * Returns an XMLHttpRequestObject
 * @return XMLHttpRequest
 */
//as found here: http://www.webpasties.com/xmlHttpRequest
function getHTTPObject() {
	var xmlHttp = null;
	// Mozilla, Opera, Safari sowie Internet Explorer (ab v7)
	if (typeof XMLHttpRequest != 'undefined') {
	    xmlHttp = new XMLHttpRequest();
	}
	if (!xmlHttp) {
	    // Internet Explorer 6 und älter
	    try {
	        xmlHttp  = new ActiveXObject("Msxml2.XMLHTTP");
	    } catch(e) {
	        try {
	            xmlHttp  = new ActiveXObject("Microsoft.XMLHTTP");
	        } catch(e) {
	            xmlHttp  = false;
	        }
	    }
	}
	return xmlHttp;
}