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server/dukang-api/src/common/redis/redis.module.ts

@@ -0,0 +1,16 @@
+import { Global, Module } from '@nestjs/common';
+import Redis from 'ioredis';
+import { RedisService } from './redis.service';
+
+@Global()
+@Module({
+  providers: [
+    {
+      provide: 'REDIS_CLIENT',
+      useFactory: () => new Redis(process.env.REDIS_URL || 'redis://localhost:6379'),
+    },
+    RedisService,
+  ],
+  exports: ['REDIS_CLIENT', RedisService],
+})
+export class RedisModule {}

server/dukang-api/src/common/redis/redis.service.ts

@@ -0,0 +1,29 @@
+import { Inject, Injectable } from '@nestjs/common';
+import Redis from 'ioredis';
+
+@Injectable()
+export class RedisService {
+  constructor(@Inject('REDIS_CLIENT') private readonly redis: Redis) {}
+
+  get client() {
+    return this.redis;
+  }
+
+  async setJson(key: string, value: unknown, ttlSeconds?: number) {
+    const payload = JSON.stringify(value);
+    if (ttlSeconds) {
+      await this.redis.set(key, payload, 'EX', ttlSeconds);
+    } else {
+      await this.redis.set(key, payload);
+    }
+  }
+
+  async getJson<T>(key: string): Promise<T | null> {
+    const raw = await this.redis.get(key);
+    return raw ? (JSON.parse(raw) as T) : null;
+  }
+
+  async del(key: string) {
+    await this.redis.del(key);
+  }
+}