Added message queue handling

lib/Client.js

@@ -61,7 +61,8 @@ var Client = (function () {
 		this.serverCache = [];
 		this.pmChannelCache = [];
 		this.readyTime = null;
-		this.optionsQueue = {};
+		this.checkingQueue = {};
+		this.messageQueue = {};
 	}
 
 	_createClass(Client, [{
@@ -607,7 +608,18 @@ var Client = (function () {
 
 					if (self.options.queue) {
 						//we're QUEUEING messages, so sending them sequentially based on servers.
-						self.addMessageQueue(destination);
+						if (!self.messageQueue[destination]) {
+							self.messageQueue[destination] = [];
+						}
+
+						self.messageQueue[destination].push({
+							content: message,
+							mentions: mentions,
+							then: [resolve, callback],
+							error: [reject, callback]
+						});
+
+						self.checkQueue(destination);
 					} else {
 						self._sendMessage(destination, message, mentions).then(mgood)["catch"](mbad);
 					}
@@ -1379,6 +1391,45 @@ var Client = (function () {
 				});
 			});
 		}
+	}, {
+		key: "checkQueue",
+		value: function checkQueue(channelID) {
+			var _this = this;
+
+			var self = this;
+
+			if (!this.checkingQueue[channelID]) {
+				(function () {
+					var doNext = function doNext() {
+						if (self.messageQueue[channelID].length === 0) {
+							done();
+							return;
+						}
+						var msgToSend = self.messageQueue[channelID][0];
+						self._sendMessage(channelID, msgToSend.content, msgToSend.mentions).then(function (msg) {
+							msgToSend.then[0](msg);
+							msgToSend.then[1](null, msg);
+							self.messageQueue[channelID].shift();
+							doNext();
+						})["catch"](function (err) {
+							msgToSend["catch"][0](err);
+							msgToSend["catch"][1](err);
+							self.messageQueue[channelID].shift();
+							doNext();
+						});
+					};
+
+					var done = function done() {
+						self.checkingQueue[channelID] = false;
+						return;
+					};
+
+					//if we aren't already checking this queue.
+					_this.checkingQueue[channelID] = true;
+					doNext();
+				})();
+			}
+		}
 	}, {
 		key: "uptime",
 		get: function get() {