add join and leave messages to minecraft script

DiscordClient.js

@@ -7,18 +7,17 @@ const opcodes = {
     EVENT: 0,
     CLIENT_HEARTBEAT: 1,
     IDENTIFY: 2,
-    RESUME: 6,
     INVALID_SESSION: 9,
     HELLO: 10,
     HEARTBEAT_ACK: 11,
 };
 
-const reconnectOnCloseCodes = [
-    1000, 1001, 4000, 4001, 4002, 4003, 4005, 4007, 4008, 4009
+const skipReconnectFor = [
+    4004, 4010, 4011, 4012, 4013, 4014
 ];
 
 class DiscordClient extends EventEmitter {
-    constructor(token, { intents, baseDomain="discord.com", gatewayUrl="wss://gateway.discord.gg/?v=9&encoding=json&compress=zlib-stream", apiBase="https://discord.com/api/v9" } = {}) {
+    constructor(token, { intents, gatewayUrl="wss://gateway.discord.gg/?v=9&encoding=json&compress=zlib-stream", apiBase="https://discord.com/api/v9" } = {}) {
         super();
         
         this.token = token;
@@ -79,19 +78,11 @@ class DiscordClient extends EventEmitter {
         };
     }
 
-    _getResumePayload() {
-        return {
-            token: this.token,
-            session_id: this.sessionId,
-            seq: this.seq
-        };
-    }
-
     _handleGatewayMessage(ws, message) {
         try {
             message = JSON.parse(message);
         } catch(e) {
-            console.error("error: DiscordClient: on `message`: failed to parse incoming message as JSON", e);
+            console.error("error: DiscordClient: on 'message': failed to parse incoming message as JSON", e);
             return;
         }
 
@@ -103,28 +94,20 @@ class DiscordClient extends EventEmitter {
 
         switch (message.op) {
             case opcodes.HELLO: {
+                console.log(`DiscordClient: HELLO; heartbeat_interval=${payload.heartbeat_interval}`);
                 this._setHeartbeat(payload.heartbeat_interval);
 
-                if (this.resuming) {
-                    console.warn("DiscordClient: resuming...");
-                    this.resuming = false;
-                    ws.send(JSON.stringify({
-                        op: opcodes.RESUME,
-                        d: this._getResumePayload()
-                    }));
-                } else {
                 ws.send(JSON.stringify({
                     op: opcodes.IDENTIFY,
                     d: this._getIdentifyPayload()
                 }));
-                }
                 break;
             }
 
             case opcodes.EVENT: {
                 switch (message.t) {
                     case "READY": {
-                        console.log("DiscordClient: ready");
+                        console.log("DiscordClient: READY");
                         this.user = payload.user;
                         this.sessionId = payload.session_id;
                         this.guilds = payload.guilds;
@@ -211,19 +194,8 @@ class DiscordClient extends EventEmitter {
             }
 
             case opcodes.INVALID_SESSION: {
-                if (message.d) {
-                    // connection is resumable, we are going to resume the connection
-                    this.resuming = true;
-                    this.connect();
-                } else {
-                    // connection is not resumable, wait some time and then send a new IDENTIFY payload
-                    setTimeout(() => {
-                        ws.send(JSON.stringify({
-                            op: opcodes.IDENTIFY,
-                            d: this._getIdentifyPayload()
-                        }));
-                    }, 3500);
-                }
+                console.error("DiscordClient: INVALID_SESSION - please check your authentication token");
+                console.error("DiscordClient: INVALID_SESSION: will not reconnect");
                 break;
             }
 
@@ -235,7 +207,9 @@ class DiscordClient extends EventEmitter {
     }
 
     connect() {
+        console.log("DiscordClient: connecting...");
         if (this.ws) {
+            console.log("DiscordClient: a websocket connection already exists, killing...");
             this.ws.removeAllListeners();
             this.ws.close();
             this.ws = null;
@@ -249,30 +223,37 @@ class DiscordClient extends EventEmitter {
         });
 
         // we decompressed the data, send it to the handler now
-        this.inflate.on("data", (message) => this._handleGatewayMessage(ws, message));
-
+        this.inflate.on("data", (message) =>
+            this._handleGatewayMessage(ws, message)
+        );
         ws.on("message", (data, isBinary) => {
             // pass the data to the decompressor
             this.inflate.write(data);
         });
 
+
+        ws.on("open", () => {
+            console.log("DiscordClient: WebSocket 'open'")
+        });
+
         ws.on("close", (code, reason) => {
             reason = reason.toString();
-            console.error(`DiscordClient: on \`close\`: disconnected from gateway: code \`${code}\`, reason \`${reason}\``);
+            console.error(`DiscordClient: on 'close': disconnected from gateway: code '${code}', reason '${reason}'`);
 
             this.emit("close", code, reason);
             this._setHeartbeat(-1);
-            if (reconnectOnCloseCodes.includes(code)) {
-                this.resuming = true;
+            if (skipReconnectFor.includes(code)) {
+                console.error("DiscordClient: on 'close': the exit code above is in skipReconnectFor, and thus the server will not reconnect.");
+            } else {
+                console.log("DiscordClient: on 'close': the client will now attempt to reconnect...");
                 this.connect();
             }
         });
 
         ws.on("error", (e) => {
-            console.error("DiscordClient: websocket error:", e);
-            console.log("DiscordClient: reconnecting?");
+            console.error("DiscordClient: on 'error': websocket error:", e);
+            console.log("DiscordClient: on 'error': reconnecting due to previous websocket error...");
             this._setHeartbeat(-1);
-            this.resuming = true;
             this.connect();
         });
     }

scripts/minecraft.js

@@ -23,6 +23,8 @@ const messageTypes = {
 };
 
 const chatMessageRegex = /^\[(?:.*?)\]: \<(?<username>.*)\> (?<message>.*)/;
+const joinNotificationRegex = /^\[(?:.*?)\]: (?<username>.*) joined the game/;
+const leaveNotificationRegex = /^\[(?:.*?)\]: (?<username>.*) left the game/;
 const rconConnection = new Rcon("localhost", "25575", process.env.RCON_PASSWORD);
 
 export default class GatewayClient {
@@ -91,7 +93,7 @@ export default class GatewayClient {
             console.log("gateway: open");
         });
         this.ws.on("close", () => {
-            console.log("gateway: closed");
+            console.log("gateway: closed, reconnecting in 4000ms");
             setTimeout(() => {
                 console.log("gateway: reconnecting");
                 this.connect(token);
@@ -141,10 +143,10 @@ async function main() {
     rconConnection.on("error", (e) => {
         console.error("rcon: got error", e);
         if (!rconConnection.hasAuthed) {
-            console.log("rcon: reconnecting in 1200ms due to error before hasAuthed");
+            console.log("rcon: reconnecting in 5000ms due to error before hasAuthed (server might not be up yet?)");
             setTimeout(() => {
                 rconConnection.connect();
-            }, 1200);
+            }, 5000);
         }
     });
     const gateway = new GatewayClient(GATEWAY_ORIGIN);
@@ -160,12 +162,24 @@ async function main() {
     process.stdin.on("data", async (rawDataBuffer) => {
         const stringData = rawDataBuffer.toString().trim();
         console.log(stringData);
-        const result = chatMessageRegex.exec(stringData);
-        if (!result)
-            return;
-        const { username, message } = result.groups;
 
-        await sendBridgeMessageAs(TARGET_GUILD_ID, TARGET_CHANNEL_ID, message, username, null);
+        const joinResult = joinNotificationRegex.exec(stringData);
+        if (joinResult) {
+            await sendBridgeMessageAs(TARGET_GUILD_ID, TARGET_CHANNEL_ID, `**${joinResult.groups.username}** joined the game`, null, null);
+            return;
+        }
+
+        const leaveResult = leaveNotificationRegex.exec(stringData);
+        if (leaveResult) {
+            await sendBridgeMessageAs(TARGET_GUILD_ID, TARGET_CHANNEL_ID, `**${leaveResult.groups.username}** left the game`, null, null);
+            return;
+        }
+
+        const messageResult = chatMessageRegex.exec(stringData);
+        if (messageResult) {
+            await sendBridgeMessageAs(TARGET_GUILD_ID, TARGET_CHANNEL_ID, messageResult.groups.message, messageResult.groups.username, null);
+            return;
+        }
     });
 }