feat(backend): add fastify api, auth, prisma schema and jobs

apps/backend/src/utils/errors.ts

@@ -0,0 +1,49 @@
+export class HttpError extends Error {
+  readonly statusCode: number;
+  readonly code: string;
+  readonly details?: unknown;
+
+  constructor(statusCode: number, code: string, message: string, details?: unknown) {
+    super(message);
+    this.name = 'HttpError';
+    this.statusCode = statusCode;
+    this.code = code;
+    this.details = details;
+  }
+}
+
+export class InvalidCredentialsError extends HttpError {
+  constructor() {
+    super(401, 'INVALID_CREDENTIALS', 'Invalid username or password');
+  }
+}
+
+export class UnauthorizedError extends HttpError {
+  constructor(message = 'Not authenticated') {
+    super(401, 'UNAUTHORIZED', message);
+  }
+}
+
+export class NotFoundError extends HttpError {
+  constructor(what = 'Resource') {
+    super(404, 'NOT_FOUND', `${what} not found`);
+  }
+}
+
+export class ConflictError extends HttpError {
+  constructor(message: string) {
+    super(409, 'CONFLICT', message);
+  }
+}
+
+export class ValidationError extends HttpError {
+  constructor(message: string, details?: unknown) {
+    super(400, 'VALIDATION', message, details);
+  }
+}
+
+export class ForbiddenError extends HttpError {
+  constructor(message = 'Forbidden') {
+    super(403, 'FORBIDDEN', message);
+  }
+}

apps/backend/src/utils/password.ts

@@ -0,0 +1,11 @@
+import bcrypt from 'bcryptjs';
+
+export const BCRYPT_ROUNDS = 12;
+
+export async function hashPassword(plain: string): Promise<string> {
+  return bcrypt.hash(plain, BCRYPT_ROUNDS);
+}
+
+export async function verifyPassword(plain: string, hash: string): Promise<boolean> {
+  return bcrypt.compare(plain, hash);
+}

apps/backend/src/utils/version.ts

@@ -0,0 +1,31 @@
+import { readFileSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
+import { dirname, resolve } from 'node:path';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+let cached: string | null = null;
+
+export function getBackendVersion(): string {
+  if (cached) return cached;
+  // Walk up until we find apps/backend/package.json.
+  const candidates = [
+    resolve(__dirname, '../../package.json'),
+    resolve(__dirname, '../../../package.json'),
+    resolve(process.cwd(), 'package.json'),
+  ];
+  for (const p of candidates) {
+    try {
+      const raw = readFileSync(p, 'utf-8');
+      const pkg = JSON.parse(raw) as { name?: string; version?: string };
+      if (pkg.name === '@family-wishlist/backend' && pkg.version) {
+        cached = pkg.version;
+        return cached;
+      }
+    } catch {
+      // try next
+    }
+  }
+  cached = '0.0.0';
+  return cached;
+}