dynmap/web/js/chat.js

var ip;
$.ajax({
	type: "GET",
	url: "//jsonip.appspot.com/?callback=?",
	dataType: "jsonp",
	success: function(getip) { ip = getip.ip; }
	});

componentconstructors['chat'] = function(dynmap, configuration) {
	return {
		dynmap: dynmap,
		initialize: function() {
			// Provides 'chat'-events by monitoring the world-updates.
			$(dynmap).bind('worldupdate', function(event, update) {
				swtch(update.type, {
					chat: function() {
						$(dynmap).trigger('chat', [{source: 'player', name: update.playerName, text: update.message}]);
					},
					webchat: function() {
						$(dynmap).trigger('chat', [{source: 'web', name: update.playerName, text: update.message}]);
					}
				});
			});
			
			if (dynmap.options.allowwebchat) {
				// Accepts 'sendchat'-events to send chat messages to the server.
				$(dynmap).bind('sendchat', function(event, message) {
					var data = '{"name":"'+ip+'","message":"'+message+'"}';
					$.ajax({
						type: 'POST',
						url: 'up/sendmessage',
						data: data,
						dataType: 'json',
						success: function(response) {
							//handle response
							if(response) {
								$(dynmap).trigger('chat', [{source: 'me', name: ip, text: message}]);
							}
						}
					});
				});
			}
		}
	};
};