feat: Add core services for user, category, item, and restaurant management, including caching and ownership verification.

src/user/user.module.ts

@@ -2,9 +2,10 @@ import { Module } from '@nestjs/common';
 import { UserController } from './user.controller';
 import { UserService } from './user.service';
 import { PrismaModule } from 'src/prisma/prisma.module';
+import { CacheModule } from 'src/cache/cache.module';
 
 @Module({
-  imports: [PrismaModule],
+  imports: [PrismaModule, CacheModule],
   controllers: [UserController],
   providers: [UserService],
 })

src/user/user.service.ts

@@ -1,9 +1,14 @@
 import { Injectable, NotFoundException } from '@nestjs/common';
 import { PrismaService } from 'src/prisma/prisma.service';
+import { CacheService } from 'src/cache/cache.service';
+import { keys } from 'src/cache/cache.keys';
 
 @Injectable()
 export class UserService {
-  constructor(private readonly prisma: PrismaService) {}
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly cache: CacheService,
+  ) {}
 
   async getAllUsers() {
     return this.prisma.user.findMany({
@@ -12,11 +17,17 @@ export class UserService {
   }
 
   async getUserById(id: string) {
+    const cacheKey = keys.user(id);
+    const cached = await this.cache.get(cacheKey);
+    if (cached) return cached;
+
     const user = await this.prisma.user.findUnique({
       where: { id },
       include: { accounts: true, sessions: true, restaurants: true },
     });
     if (!user) throw new NotFoundException('User not found');
+
+    await this.cache.set(cacheKey, user, 600);
     return user;
   }
 
@@ -25,7 +36,14 @@ export class UserService {
     await this.prisma.session.deleteMany({ where: { userId: id } });
     await this.prisma.account.deleteMany({ where: { userId: id } });
     await this.prisma.restaurant.deleteMany({ where: { ownerId: id } });
-    return this.prisma.user.delete({ where: { id } });
+
+    const deleted = await this.prisma.user.delete({ where: { id } });
+
+    // Invalidate caches
+    await this.cache.del(keys.user(id));
+    await this.cache.del(keys.userRestaurants(id));
+
+    return deleted;
   }
 
   async getSessionsByUserId(id: string) {