dojo.provide("dojox.xmpp.util");
dojo.require("dojox.string.Builder");

dojox.xmpp.util.xmlEncode = function(str) {
	if(str) {
		str = str.replace("&", "&amp;").replace(">", "&gt;").replace("<", "&lt;").replace("'", "&apos;").replace('"', "&quot;");
	}
	return str;
}

dojox.xmpp.util.encodeJid = function(jid) {
		var buffer = new dojox.string.Builder();
		for(var i =0; i < jid.length; i++) {
			var ch = jid.charAt(i);
			var rep = ch;
			switch(ch){
				case ' ' : 
					rep = "\\20";
				break;
				case '"' :
					rep = "\\22"; 
				break;
				case '#' :
					rep = "\\23"; 
				break;
				case '&' :
					rep = "\\26"; 
				break;
				case "'" :
					rep = "\\27"; 
				break;
				case '/' :
					rep = "\\2f"; 
				break;
				case ':' :
					rep = "\\3a"; 
				break;
				case '<' :
					rep = "\\3c"; 
				break;
				case '>' :
					rep = "\\3e"; 
				break;			
			}
			buffer.append(rep);
		}
		return buffer.toString();
	}

dojox.xmpp.util.decodeJid = function(jid) {
	
	jid = jid.replace(/\\([23][02367acef])/g, function(match) {
			switch(match){
				case "\\20" : 
					return  ' ';
				case "\\22"  :
					return '"'; 
				case "\\23" :
					return '#' ; 
				case "\\26" :
					return  '&'; 
				case "\\27" :
					return   "'"; 
				case "\\2f" :
					return  '/'; 
				case "\\3a" :
					return ':' ; 
				case "\\3c" :
					return  '<'; 
				case "\\3e" :
					return  '>'; 
			}
			return "ARG";
	});
	
	return jid;
}


dojox.xmpp.util.createElement = function(tag, attributes, terminal){
	var elem = new dojox.string.Builder("<");
	elem.append(tag + " ");

	for (var attr in attributes){
		elem.append(attr + '="');
		elem.append(attributes[attr]);
		elem.append('" ');
	}	
	
	if (terminal){
		elem.append("/>");		
	}else{
		elem.append(">");
	}

	return elem.toString();
}

dojox.xmpp.util.stripHtml = function(str){
	// summary
	//		Strips all HTML, including attributes and brackets
	//		| <div onmouse="doBadThing()">Click <b>Me</b></div>
	//		| becomes: Click Me
	var re=/<[^>]*?>/gi;
	for (var i=0; i<arguments.length; i++) {}
	return str.replace(re, "");
}

dojox.xmpp.util.decodeHtmlEntities = function(str){
	// Summary: decodes HTML entities to js characters so the string can be 
	// fed to a textarea.value
	var ta = dojo.doc.createElement("textarea");
	ta.innerHTML = str.replace(/</g,"&lt;").replace(/>/g,"&gt;");
	return ta.value;
}

dojox.xmpp.util.htmlToPlain = function(str){
	str = dojox.xmpp.util.decodeHtmlEntities(str);
	str = str.replace(/<br\s*[i\/]{0,1}>/gi,"\n");
	str = dojox.xmpp.util.stripHtml(str);
	return str;
}

dojox.xmpp.util.Base64 = {};
dojox.xmpp.util.Base64.keylist = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

dojox.xmpp.util.Base64.encode = function(input){
	var output = "";
	var c1, c2, c3;
	var encoded1, encoded2, encoded3, encoded4;
	var i = 0;

	do {
		c1 = c2 = c3 = "";
		encoded1 = encoded2 = encoded3 = encoded4 = "";

		c1 = input.charCodeAt(i++);
		c2 = input.charCodeAt(i++);
		c3 = input.charCodeAt(i++);

		encoded1 = c1 >> 2;
		encoded2 = ((c1 & 3) << 4) | (c2 >> 4);
		encoded3 = ((c2 & 15) << 2) | (c3 >> 6);
		encoded4 = c3 & 63;

		if (isNaN(c2)) {
			encoded3 = encoded4 = 64;
		} else if (isNaN(c3)) {
			encoded4 = 64;
		}

		output = output + dojox.xmpp.util.Base64.keylist.charAt(encoded1) + dojox.xmpp.util.Base64.keylist.charAt(encoded2) +
		dojox.xmpp.util.Base64.keylist.charAt(encoded3) + dojox.xmpp.util.Base64.keylist.charAt(encoded4);

	} while (i < input.length);

	return output;
}


dojox.xmpp.util.Base64.decode = function(input){
	var output = "";
	var c1, c2, c3;
	var encoded1, encoded2, encoded3, encoded4 = "";
	var i = 0;

	do {
		c1 = c2 = c3 = "";
		encoded1 = encoded2 = encoded3 = encoded4 = "";

		encoded1 = dojox.xmpp.util.Base64.keylist.indexOf(input.charAt(i++));
		encoded2 = dojox.xmpp.util.Base64.keylist.indexOf(input.charAt(i++));
		encoded3 = dojox.xmpp.util.Base64.keylist.indexOf(input.charAt(i++));
		encoded4 = dojox.xmpp.util.Base64.keylist.indexOf(input.charAt(i++));

		c1 = (encoded1 << 2) | (encoded2 >> 4);
		c2 = ((encoded2 & 15) << 4) | (encoded3 >> 2);
		c3 = ((encoded3 & 3) << 6) | encoded4;

		output = output + String.fromCharCode(c1);

		if (encoded3 != 64) {
			output = output + String.fromCharCode(c2);
		}

		if (encoded4 != 64) {
			output = output + String.fromCharCode(c3);
		}
	} while (i < input.length);

	return output;
}