init

.gitignore

@@ -0,0 +1,140 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.*
+!.env.example
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+.output
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Sveltekit cache directory
+.svelte-kit/
+
+# vitepress build output
+**/.vitepress/dist
+
+# vitepress cache directory
+**/.vitepress/cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# Firebase cache directory
+.firebase/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v3
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+
+# Vite logs files
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*

index.js

@@ -0,0 +1,111 @@
+import WebSocket, { WebSocketServer } from 'ws';
+
+let hostConnection;
+let displayConnection;
+
+const wss = new WebSocketServer({
+    port: 12345,
+}, () => {
+    console.log("Websocket Server started\nListening on Port 12345")
+});
+
+wss.on('connection', (ws) => {
+    console.log("Trying to connect");
+    ws.on('error', console.error);
+
+    ws.on('message', (data) => {
+        if (ws == hostConnection || ws == displayConnection) return;
+        console.log('received: %s', data);
+        if (data == "HOST") {
+            if (hostConnection === undefined) {
+                hostConnection = ws;
+                initHostConnection();
+            }
+            else
+            {
+                ws.send("ERROR HOST");
+                ws.close();
+            }
+        } else if (data == "DISPLAY") {
+            if (displayConnection === undefined) {
+                displayConnection = ws;
+                initDisplayConnection();
+            }
+            else
+            {
+                ws.send("ERROR DISPLAY");
+                ws.close();
+            }
+        }
+        else
+        {
+            ws.send("ERROR MESSAGE");
+            ws.close();
+        }
+    })
+
+    // ws.send('Connected to server');
+});
+
+function initHostConnection() {
+    console.log("Initialize Host connection...");
+
+    hostConnection.on('message', (data) => {
+        console.log("[HOST] " + data);
+        if (displayConnection) {
+            displayConnection.send("" + data);
+        }
+    });
+
+    hostConnection.on('error', (data) => {
+        console.error("[HOST] " + data);
+        hostConnection = undefined;
+        if (displayConnection) {
+            displayConnection.send("HOST-DISCONNECTED");
+        }
+    });
+
+    hostConnection.on('close', (code, reason) => {
+        console.error("[HOST] " + code + " " + reason);
+        hostConnection = undefined;
+        if (displayConnection) {
+            displayConnection.send("HOST-DISCONNECTED");
+        }
+    });
+
+    hostConnection.send("HOST");
+    if (displayConnection) {
+        displayConnection.send("HOST-CONNECTED");
+        hostConnection.send("DISPLAY-CONNECTED");
+    }
+}
+
+function initDisplayConnection() {
+    console.log("Initialize Display connection...");
+
+    displayConnection.on('message', (data) => {
+        console.log("[DISPLAY] " + data);
+    });
+
+    displayConnection.on('error', (data) => {
+        console.error("[DISPLAY] " + data);
+        displayConnection = undefined;
+        if (hostConnection) {
+            hostConnection.send("DISPLAY-DISCONNECTED");
+        }
+    });
+
+    displayConnection.on('close', (code, reason) => {
+        console.error("[DISPLAY] " + code + " " + reason);
+        displayConnection = undefined;
+        if (hostConnection) {
+            hostConnection.send("DISPLAY-DISCONNECTED");
+        }
+    });
+
+    displayConnection.send("DISPLAY");
+    if (hostConnection) {
+        hostConnection.send("DISPLAY-CONNECTED");
+        displayConnection.send("HOST-CONNECTED");
+    }
+}

package-lock.json

@@ -0,0 +1,37 @@
+{
+  "name": "jeopardyserver",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "jeopardyserver",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "ws": "^8.18.3"
+      }
+    },
+    "node_modules/ws": {
+      "version": "8.18.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.3.tgz",
+      "integrity": "sha512-PEIGCY5tSlUt50cqyMXfCzX+oOPqN0vuGqWzbcJ2xvnkzkq46oOpz7dQaTDBdfICb4N14+GARUDw2XV2N4tvzg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    }
+  }
+}

package.json

@@ -0,0 +1,15 @@
+{
+  "name": "jeopardyserver",
+  "version": "1.0.0",
+  "description": "",
+  "license": "ISC",
+  "author": "",
+  "type": "module",
+  "main": "index.js",
+  "scripts": {
+    "dev": "node index.js"
+  },
+  "dependencies": {
+    "ws": "^8.18.3"
+  }
+}