initializing the files and the memory bank.

packages/backend/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "backend",
+  "version": "0.1.0",
+  "private": true,
+  "description": "YouTube chat poller and realtime bridge.",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "dev": "ts-node src/index.ts",
+    "build": "tsc -p tsconfig.build.json",
+    "start": "node dist/index.js",
+    "lint": "eslint 'src/**/*.{ts,tsx}'"
+  }
+}

packages/backend/src/index.ts

@@ -0,0 +1,12 @@
+import { bootstrapInnertube, fetchChatBatch } from './ingestion/youtubei';
+
+export async function startBackend() {
+  console.log('Starting backend worker (youtubei ingestion pending).');
+  const state = await bootstrapInnertube();
+  console.log('Initial continuation state', state);
+  await fetchChatBatch(state);
+}
+
+if (require.main === module) {
+  void startBackend();
+}

packages/backend/src/ingestion/youtubei.ts

@@ -0,0 +1,18 @@
+export type ContinuationState = {
+  token: string | null;
+  apiKey?: string;
+};
+
+export async function bootstrapInnertube(): Promise<ContinuationState> {
+  // TODO: fetch initial visitor data and live chat continuation token via youtubei.js
+  return { token: null };
+}
+
+export async function fetchChatBatch(state: ContinuationState) {
+  // TODO: use youtubei.js to fetch messages with the provided continuation token
+  // return both normalized messages and the next continuation token
+  return {
+    messages: [],
+    next: state.token
+  };
+}

packages/backend/tsconfig.build.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "declaration": true,
+    "emitDeclarationOnly": false
+  }
+}

packages/backend/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "module": "CommonJS",
+    "target": "ES2021",
+    "noEmit": false
+  },
+  "include": ["src"]
+}