Client: rename internal WebSocket event handlers

public_html/js/client.js

@@ -4,55 +4,76 @@ class Client {
 	constructor(wsUri) {
 		this.wsUri = wsUri;
 
-		// Create WebSocket and set callbacks
+		// Create WebSocket and set internal callbacks
 		console.log("Initialize Client...")
 		this.webSocket = new WebSocket(wsUri);
-		this.webSocket.onopen = this.onOpen.bind(this);
-		this.webSocket.onclose = this.onClose.bind(this);
-		this.webSocket.onmessage = this.onMessage.bind(this);
-		this.webSocket.onerror = this.onError.bind(this);
+		this.webSocket.onopen = this._onSocketOpen.bind(this);
+		this.webSocket.onclose = this._onSocketClose.bind(this);
+		this.webSocket.onerror = this._onSocketError.bind(this);
+		this.webSocket.onmessage = this._onSocketMessage.bind(this);
 	}
 
-	// WebSocket event handlers
-	onOpen(evt) {
+	// Internal WebSocket event handlers
+	_onSocketOpen(evt) {
 		console.log("Connected to " + this.wsUri);
 
 		// Send init command containing chat ID and nickname
 		this.sendInit();
 	}
 
-	onClose(evt) {
+	_onSocketClose(evt) {
 		console.log("Connection closed (code " + evt.code + ").");
 	}
 
-	onMessage(evt) {
-		console.log("Received: " + evt.data);
-		this.parseMessage(evt.data);
-	}
-
-	onError(evt) {
+	_onSocketError(evt) {
 		console.error("Connection error: ", evt);
 	}
 
-	// Command senders
-	sendInit() {
-		// Define command as JSON object
-		let initObj = {
-			action: "init",
-			chat_id: "42",
-			nickname: "binaryDiv"
-		};
-
-		// Send command as JSON string
-		let initJson = JSON.stringify(initObj);
-		console.log("Sending init: " + initJson);
-		this.webSocket.send(initJson);
+	_onSocketMessage(evt) {
+		console.log("Received: " + evt.data);
+		this._parseMessage(evt.data);
 	}
 
-	// Message parsing
-	parseMessage(msgString) {
+	/**
+	 * Sends an arbitrary command as JSON.
+	 *
+	 * commandObj: The command as an object ('action' specifies type of command).
+	 */
+	sendCommand(commandObj) {
+		const commandJson = JSON.stringify(commandObj);
+		console.log("Sending command: " + commandJson);
+		this.webSocket.send(commandJson);
+	}
+
+	/**
+	 * Sends the 'init' command which sets up the session. Also sets the chat ID and nickname.
+	 */
+	sendInit() {
+		this.sendCommand({
+			action: "init",
+			chat_id: "42",
+			nickname: "binaryDiv",
+		});
+	}
+
+	/**
+	 * Sends the 'message' command which sends a chat message to the chat.
+	 *
+	 * msgText: The text of the chat message.
+	 */
+	sendChatMessage(msgText) {
+		this.sendCommand({
+			action: "message",
+			text: msgText,
+		});
+	}
+
+	/**
+	 * Parses an incoming JSON message and dispatches specific events.
+	 */
+	_parseMessage(msgString) {
 		try {
-			let msg = JSON.parse(msgString);
+			const msg = JSON.parse(msgString);
 
 			switch (msg.type) {
 				// Response to "init" command