init

backend/Dockerfile

@@ -0,0 +1,23 @@
+FROM node:20-slim AS build
+
+WORKDIR /app
+
+COPY package*.json tsconfig.json ./
+RUN npm install
+
+COPY src ./src
+RUN npm run build
+
+# Finalny obraz
+FROM node:20-slim
+
+WORKDIR /app
+
+COPY --from=build /app/package*.json ./
+RUN npm install --omit=dev
+
+COPY --from=build /app/dist ./dist
+
+EXPOSE 3000
+CMD ["node", "dist/server.js"]
+

backend/_export

@@ -0,0 +1,16 @@
+> repo_export.txt  # wyczyść plik wynikowy
+
+while IFS= read -r file; do
+  # Pomijaj puste linie i pliki z katalogu _export
+  [[ -z "$file" || "$file" == *_export* ]] && continue
+
+  # Sprawdź, czy plik istnieje i nie jest ukryty
+  [[ -f "$file" && "$file" != */.* ]] || continue
+
+  echo "=== FILE: $file ==="
+  echo
+  cat "$file"
+  echo
+  echo
+done < files.txt > repo_export.txt
+

backend/_find

@@ -0,0 +1 @@
+find . \( -path "./node_modules" -o -path "./dist" \) -prune -o -print > files.txt

backend/docker-compose.yml

@@ -0,0 +1,31 @@
+version: "3.9"
+
+services:
+  postgres:
+    image: postgres:16
+    container_name: pg-demo
+    restart: always
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: demo
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    ports:
+      - "5432:5432"
+
+  backend:
+    build: .
+    container_name: backend-demo
+    restart: always
+    depends_on:
+      - postgres
+    environment:
+      DATABASE_URL: postgres://postgres:postgres@postgres:5432/demo
+      PORT: 3000
+    ports:
+      - "3000:3000"
+
+volumes:
+  pgdata:
+

backend/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "fastify-graphql-demo",
+  "version": "1.0.0",
+  "main": "dist/server.js",
+  "type": "module",
+  "scripts": {
+    "dev": "ts-node-dev --respawn --transpile-only src/server.ts",
+    "build": "tsc -p .",
+    "start": "node dist/server.js"
+  },
+  "dependencies": {
+    "fastify": "^4.26.2",
+    "mercurius": "^16.2.0",
+    "pg": "^8.11.3"
+  },
+  "devDependencies": {
+    "@types/node": "^22.7.4",
+    "@types/pg": "^8.15.5",
+    "ts-node-dev": "^2.0.0",
+    "typescript": "^5.6.3"
+  }
+}

backend/src/db.ts

@@ -0,0 +1,32 @@
+import pkg from "pg";
+const { Pool } = pkg;
+
+const pool = new Pool({
+  connectionString:
+    process.env.DATABASE_URL ||
+    "postgres://postgres:postgres@localhost:5432/demo",
+});
+
+export async function query<T extends pkg.QueryResultRow>(
+  q: string,
+  params?: any[]
+): Promise<T[]> {
+  const client = await pool.connect();
+  try {
+    const res = await client.query<T>(q, params);
+    return res.rows;
+  } finally {
+    client.release();
+  }
+}
+
+export async function initDB(): Promise<void> {
+  await query(`
+    CREATE TABLE IF NOT EXISTS pump_data (
+      id SERIAL PRIMARY KEY,
+      payload JSONB NOT NULL,
+      created_at TIMESTAMP DEFAULT now()
+    );
+  `);
+}
+

backend/src/server.ts

@@ -0,0 +1,65 @@
+import Fastify from "fastify";
+import mercurius from "mercurius";
+import { query, initDB } from "./db.js";
+
+const app = Fastify();
+
+// Healthchecki
+app.get("/healthz", async () => ({ status: "ok" }));
+app.get("/readyz", async () => ({ ready: true }));
+
+// Schemat GraphQL
+const schema = `
+  type PumpResult {
+    id: ID!
+    created_at: String!
+  }
+
+  type Query {
+    health: String!
+  }
+
+  type Mutation {
+    pump(payload: String!): PumpResult!
+  }
+`;
+
+const resolvers = {
+  Query: {
+    health: async () => "ok",
+  },
+  Mutation: {
+    pump: async (_: unknown, { payload }: { payload: string }) => {
+      const rows = await query<{ id: number; created_at: string }>(
+        "INSERT INTO pump_data(payload) VALUES($1) RETURNING id, created_at",
+        [payload]
+      );
+      return rows[0];
+    },
+  },
+};
+
+// Rejestracja GraphQL
+app.register(mercurius, {
+  schema,
+  resolvers,
+  graphiql: true,
+});
+
+const start = async () => {
+  try {
+    await initDB();
+
+    const port = Number(process.env.PORT) || 3000;
+    await app.listen(port, "0.0.0.0");
+
+    console.log(`🚀 Server running at http://0.0.0.0:${port}/graphql`);
+
+  } catch (err) {
+    console.error(err);
+    process.exit(1);
+  }
+};
+
+start();
+

backend/tsconfig.json

@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "ES2020",
+    "moduleResolution": "Node",
+    "outDir": "dist",
+    "rootDir": "src",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "skipLibCheck": true
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["node_modules"]
+}
+