Use lib

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "lib"]
+	path = lib
+	url = https://github.com/Toby222/web-drs-lib.git

lib

@@ -0,0 +1 @@
+Subproject commit 9fc4e8f80d335abc3ab02bfc24d64afcc91f3567

server.deno.ts

@@ -1,6 +1,9 @@
+import { WebSocketServer } from "https://deno.land/x/websocket@v0.1.3/mod.ts";
 import {
-  WebSocketServer
-} from "https://deno.land/x/websocket@v0.1.3/mod.ts";
+  isServerMessage,
+  isTextMessage,
+  MessageType,
+} from "./lib/types/ServerMessage.ts";
 
 const port = 8989;
 const timeout = 15000;
@@ -9,28 +12,29 @@ const server = new WebSocketServer(port);
 
 console.log("listening on port: " + port);
 
-function ackPkg() {
-  return JSON.stringify({
-    type: "ack",
-    date: Date.now(),
-  });
-}
-
 server.on("connection", function connection(socket) {
   function close() {
     socket.send("closing connection due to inactivity");
     socket.close();
   }
 
-  socket.on("message", function (message: string) {
-    console.log("message: " + message);
+  socket.on("message", function (rawMessage: string) {
+    console.log("message: " + rawMessage);
+
+    const message = JSON.parse(rawMessage);
+    if (!isServerMessage(message)) {
+      console.error(`Unexpected message received from client \`${message}\``);
+    }
+    if (isTextMessage(message)) {
       socket.send(
         JSON.stringify({
+          type: MessageType.TEXT,
           date: Date.now(),
           author: "ECHO Service",
-        content: message,
-      })
+          content: message.content,
+        }),
       );
+    }
     clearTimeout(closeTimeout);
     closeTimeout = setTimeout(close, timeout);
   });