// How to use:
// -----------
// 1. Enter the names of your emoticons in the variable ´emoticons´.
// 2. Reload the plugin.
// 3. Check the debug log for the converted shortcode.
// 4. Open the Emoticons dialog in Windows Live Messenger.
// 5. Select the emoticon you want a longer shortcode of, click on "Edit" and change the shortcode to the text you copied.
//
// (optional) 6. Change the unicode if it interferes with your messages.

// Unused Unicode used for emoticon short codes.
var characters = [ "◃", "◂" ];

// The names of the emoticons you're going to use.
var emoticons = [
	"blobcat",
	"kiss"
];

function OnEvent_Initialize(MessengerStart) {
	printEmoticonList();
}
function OnEvent_ChatWndSendMessage(ChatWnd, Message) {
	return replaceEmoticons(Message);
}

function printEmoticonList() {
	for (var i = 0; i < emoticons.length; i++) {
		var emoticonName = emoticons[i];
		var encoded = encodeIndex(i);
		Debug.Trace("Secret unicode for emoticon \"" + emoticonName + "\" is \"" + encoded + "\"");
	}
}
function replaceEmoticons(Message) {
	var readingEmoji = false;
	var startIndex = null;
	var emojiBuffer = "";
	
	for (var i = 0; i < Message.length; i++) {
		var char = Message.charAt(i);
		
		if (char === ":") {
			if (readingEmoji) {
				var emojiIndex = indexOf(emoticons, emojiBuffer);
				
				Debug.Trace("Searching for emoji called " + emojiBuffer);
				
				if (emojiIndex == -1) {
					// clear emoji buffer
					emojiBuffer = "";
				} else {
					// emoji found, replacing Message.
					Debug.Trace("Replacing emoji at " + i);
					var prefix = Message.substring(0, startIndex);
					var suffix = Message.substring(i + 1);
					Message = prefix + encodeIndex(emojiIndex) + suffix;
					readingEmoji = false;
				}
			} else {
				Debug.Trace("Started reading emoji");
				startIndex = i;
				readingEmoji = true;
			}
		} else if (readingEmoji) {
			emojiBuffer = emojiBuffer + char;
		}
	}
	
	return Message;
}
function encodeIndex(idx1) {
	var oldBits = idx1.toString(2);
	var newBits = "";
	
	for (var idx2 = 0; idx2 < oldBits.length; idx2++) {
		var oldChar = oldBits.charAt(idx2);
		var pos = parseInt(oldChar);
		var newChar = characters[pos];
		newBits = newBits + newChar;
	}
	
	return newBits;
}
function indexOf(array, element) {
	for (var i = 0; i < array.length; i++) {
		if (array[i] == element)
			return i;
	}
	
	return -1;
}