TypingStart handler

src/client/websocket/packets/WebSocketPacketManager.js

@@ -35,6 +35,7 @@ class WebSocketPacketManager {
 		this.register(Constants.WSEvents.PRESENCE_UPDATE, 'PresenceUpdate');
 		this.register(Constants.WSEvents.USER_UPDATE, 'UserUpdate');
 		this.register(Constants.WSEvents.VOICE_STATE_UPDATE, 'VoiceStateUpdate');
+		this.register(Constants.WSEvents.TYPING_START, 'TypingStart');
 	}
 
 	get client() {

src/client/websocket/packets/handlers/TypingStart.js

@@ -0,0 +1,62 @@
+'use strict';
+
+const AbstractHandler = require('./AbstractHandler');
+const Structure = name => require(`../../../../structures/${name}`);
+const Constants = require('../../../../util/Constants');
+const CloneObject = require('../../../../util/CloneObject');
+
+const Role = Structure('User');
+
+class TypingData {
+	constructor(since, lastTimestamp, _timeout) {
+		this.since = since;
+		this.lastTimestamp = lastTimestamp;
+		this._timeout = _timeout;
+	}
+
+	resetTimeout(_timeout) {
+		clearTimeout(this._timeout);
+		this._timeout = _timeout;
+	}
+
+	get elapsedTime() {
+		return Date.now() - this.since;
+	}
+}
+
+class TypingStartHandler extends AbstractHandler {
+
+	constructor(packetManager) {
+		super(packetManager);
+	}
+
+	handle(packet) {
+		let data = packet.d;
+		let client = this.packetManager.client;
+		let channel = client.store.get('channels', data.channel_id);
+		let user = client.store.get('users', data.user_id);
+		let timestamp = new Date(data.timestamp * 1000);
+
+		if (channel && user) {
+			if (channel.typingMap[user.id]) {
+				// already typing, renew
+				let mapping = channel.typingMap[user.id];
+				mapping.lastTimestamp = timestamp;
+				mapping.resetTimeout(tooLate());
+			} else {
+				channel.typingMap[user.id] = new TypingData(timestamp, timestamp, tooLate());
+				client.emit(Constants.Events.TYPING_START, channel, user);
+			}
+		}
+
+		function tooLate() {
+			return setTimeout(() => {
+				client.emit(Constants.Events.TYPING_STOP, channel, user, channel.typingMap[user.id]);
+				delete channel.typingMap[user.id];
+			}, 6000);
+		}
+	}
+
+};
+
+module.exports = TypingStartHandler;