Switch database from SQLite to PostgreSQL

Replace in-memory JSON file storage with Prisma ORM using PostgreSQL.
Update environment variables and Prisma schema accordingly.

.env.example

@@ -1,3 +1,3 @@
-DATABASE_URL="file:./dev.db"
+DATABASE_URL="postgresql://postgres:postgres@localhost:5432/bikeapp?schema=public"
 OLLAMA_URL="http://localhost:11434"
 OLLAMA_MODEL="llama3.1:8b"

.env.local

@@ -0,0 +1,3 @@
+DATABASE_URL="postgresql://postgres:postgres@localhost:5432/bikeapp?schema=public"
+OLLAMA_URL="http://localhost:11434"
+OLLAMA_MODEL="llama3.1:8b"

package.json

@@ -1 +1,31 @@
-{"scripts":{"dev":"next dev","build":"next build","start":"next start","lint":"eslint src","db:seed":"tsx prisma/seed.ts"},"dependencies":{"@prisma/client":"^5.22.0","next":"^16.2.6","postcss":"^8.5.10","prisma":"^5.22.0","react":"^19.2.1","react-dom":"^19.2.1","sharp":"^0.33.5","zod":"^3.23.8"},"devDependencies":{"@types/node":"^20.17.6","@types/react":"^19.2.7","@types/react-dom":"^19.2.3","eslint":"^9.39.4","eslint-config-next":"^16.2.6","tsx":"^4.19.2","typescript":"^5.6.3"}}
+{
+    "scripts": {
+        "dev": "next dev",
+        "build": "next build",
+        "start": "next start",
+        "lint": "eslint src",
+        "db:seed": "tsx prisma/seed.ts",
+        "db:migrate": "prisma migrate dev",
+        "db:studio": "prisma studio",
+        "postinstall": "prisma generate"
+    },
+    "dependencies": {
+        "@prisma/client": "^5.22.0",
+        "next": "^16.2.6",
+        "postcss": "^8.5.10",
+        "prisma": "^5.22.0",
+        "react": "^19.2.1",
+        "react-dom": "^19.2.1",
+        "sharp": "^0.33.5",
+        "zod": "^3.23.8"
+    },
+    "devDependencies": {
+        "@types/node": "^20.17.6",
+        "@types/react": "^19.2.7",
+        "@types/react-dom": "^19.2.3",
+        "eslint": "^9.39.4",
+        "eslint-config-next": "^16.2.6",
+        "tsx": "^4.19.2",
+        "typescript": "^5.6.3"
+    }
+}

prisma/schema.prisma

@@ -4,7 +4,7 @@ generator client {
 }
 
 datasource db {
-  provider = "sqlite"
+  provider = "postgresql"
   url      = env("DATABASE_URL")
 }
 

src/app/api/ai/recommend/route.ts

@@ -26,7 +26,7 @@ export async function POST(request: Request) {
     .filter((product): product is Product => Boolean(product))
     .map((product) => setupVerification[product.id])
     .filter(Boolean);
-  const prefs = store.preferences();
+  const prefs = await store.preferences();
   const prompt = [
     "You are a professional mountain bike suspension and tire setup tuner.",
     "Combine manufacturer setup ranges, community setup patterns, and the rider's past preferences.",

src/app/api/builds/route.ts

@@ -21,7 +21,7 @@ const schema = z.object({
 });
 
 export async function GET() {
-  return NextResponse.json(store.listBuilds());
+  return NextResponse.json(await store.listBuilds());
 }
 
 export async function POST(request: Request) {
@@ -35,7 +35,7 @@ export async function POST(request: Request) {
     rearTireId: body.rearTireId,
   };
   const setup = { ...buildSetupDefaults(selection, body.rider), ...body.setup };
-  const build = store.createBuild({
+  const build = await store.createBuild({
     name: body.name,
     riderWeightKg: body.rider.weight,
     discipline: body.rider.discipline,

src/app/api/reviews/route.ts

@@ -19,6 +19,6 @@ const schema = z.object({
 
 export async function POST(request: Request) {
   const body = schema.parse(await request.json());
-  const review = store.createReview(body);
+  const review = await store.createReview(body);
   return NextResponse.json(review, { status: 201 });
 }

src/lib/db.ts

@@ -1,58 +1,36 @@
-import { mkdirSync, readFileSync, writeFileSync } from "node:fs";
-import path from "node:path";
+import { prisma } from "./prisma";
 
-type Database = {
-  builds: any[];
-  reviews: any[];
-};
-
-const dbPath = path.join(process.cwd(), "data", "bike-app.json");
-
-function readDb(): Database {
-  mkdirSync(path.dirname(dbPath), { recursive: true });
-  try {
-    return JSON.parse(readFileSync(dbPath, "utf8")) as Database;
-  } catch {
-    return { builds: [], reviews: [] };
-  }
-}
-
-function writeDb(data: Database) {
-  mkdirSync(path.dirname(dbPath), { recursive: true });
-  writeFileSync(dbPath, JSON.stringify(data, null, 2));
+function parseSetup(build: any) {
+    return {
+        ...build,
+        setup: build.setup ? JSON.parse(build.setup) : {},
+    };
 }
 
 export const store = {
-  listBuilds() {
-    return readDb().builds.sort((a, b) => String(b.createdAt).localeCompare(String(a.createdAt)));
-  },
-  createBuild(input: any) {
-    const data = readDb();
-    const build = {
-      id: crypto.randomUUID(),
-      ...input,
-      createdAt: new Date().toISOString(),
-    };
-    data.builds.unshift(build);
-    writeDb(data);
-    return build;
-  },
-  createReview(input: any) {
-    const data = readDb();
-    const review = {
-      id: crypto.randomUUID(),
-      ...input,
-      createdAt: new Date().toISOString(),
-    };
-    data.reviews.unshift(review);
-    writeDb(data);
-    return review;
-  },
-  preferences() {
-    const reviews = readDb().reviews;
-    return {
-      harshTendency: reviews.filter((review) => review.suspFeel >= 7).length,
-      softTendency: reviews.filter((review) => review.suspFeel <= 3).length,
-    };
-  },
+    async listBuilds() {
+        const builds = await prisma.bikeBuild.findMany({
+            orderBy: { createdAt: "desc" },
+        });
+        return builds.map(parseSetup);
+    },
+    async createBuild(input: any) {
+        const build = await prisma.bikeBuild.create({
+            data: {
+                ...input,
+                setup: JSON.stringify(input.setup ?? {}),
+            },
+        });
+        return parseSetup(build);
+    },
+    async createReview(input: any) {
+        return prisma.rideReview.create({ data: input });
+    },
+    async preferences() {
+        const reviews = await prisma.rideReview.findMany();
+        return {
+            harshTendency: reviews.filter((review) => review.suspFeel >= 7).length,
+            softTendency: reviews.filter((review) => review.suspFeel <= 3).length,
+        };
+    },
 };

src/lib/prisma.ts

@@ -0,0 +1,7 @@
+import { PrismaClient } from "@prisma/client";
+
+const globalForPrisma = globalThis as unknown as { prisma: PrismaClient };
+
+export const prisma = globalForPrisma.prisma ?? new PrismaClient();
+
+if (process.env.NODE_ENV !== "production") globalForPrisma.prisma = prisma;