final product

tools/redisDAL.js

@@ -0,0 +1,45 @@
+const { createClient } = require("redis");
+
+class RedisDAL {
+  constructor() {
+    this.client = createClient({ url:"redis://my-redis:6379" });
+
+    this.client.on("error", (err) => {
+      console.error("Redis Client Error", err);
+    });
+  }
+
+  async connect() {
+    if (!this.client.isOpen) {
+      await this.client.connect();
+      console.log("Connected to Redis");
+    }
+  }
+
+  generateKey(prefix, params) {
+    const paramString = Object.entries(params)
+      .sort()
+      .map(([k, v]) => `${k}=${v}`)
+      .join("&");
+    return `${prefix}:${paramString}`;
+  }
+
+  async get(prefix, params) {
+    const key = this.generateKey(prefix, params);
+    const cached = await this.client.get(key);
+    if (cached) return JSON.parse(cached);
+    return null;
+  }
+
+  async set(prefix, params, data, ttl = 3600) {
+    const key = this.generateKey(prefix, params);
+    await this.client.set(key, JSON.stringify(data), { EX: ttl });
+  }
+
+  async del(prefix, params) {
+    const key = this.generateKey(prefix, params);
+    await this.client.del(key);
+  }
+}
+
+module.exports = new RedisDAL();