adding redis, tasks, api calls

app/db/redis/redis.js

@@ -0,0 +1,82 @@
+const { createClient } = require('redis');
+
+class RedisClient {
+  constructor(host) {
+    this._host = host;
+  }
+
+  get client() {
+    return this._client;
+  }
+
+  async connect() {
+    const client = createClient({
+      socket: {
+        host: this._host,
+      },
+    });
+    client.on('error', (err) => console.log('Redis Client Error', err));
+    await client.connect();
+    this._client = client;
+    return client;
+  }
+
+  async set(key, value) {
+    await this._client.set(key, value);
+    return value;
+  }
+
+  async get(key) {
+    const value = await this._client.get(key);
+    return value;
+  }
+
+  async disconnect() {
+    await this._client.disconnect();
+  }
+
+}
+
+RedisClient.setPair = async function(key, value) {
+  const redis = new RedisClient(process.env.REDIS_HOST);
+  await redis.connect();
+  await redis.set(key, JSON.stringify(value));
+  await redis.disconnect();
+}
+
+RedisClient.getPair = async function(key) {
+  const redis = new RedisClient(process.env.REDIS_HOST);
+  await redis.connect();
+  const value = await redis.get(key);
+  await redis.disconnect();
+  return JSON.parse(value);
+}
+
+RedisClient.setCollection = async function(array) {
+  const redis = new RedisClient(process.env.REDIS_HOST);
+
+  await redis.connect();
+  if (Array.isArray(array)) {
+    for (let index = 0; index < array.length; index++) {
+      const pair = array[index];
+      if (Array.isArray(pair)) {
+        await redis.set(pair[0], JSON.stringify(pair[1]));
+      } else {
+        await redis.set(pair.key, JSON.stringify(pair.value));
+      }
+    }
+  } else {
+    for (const key in array) {
+      if (Object.hasOwnProperty.call(array, key)) {
+        const value = array[key];
+        await redis.set(key, JSON.stringify(value));
+      }
+    }
+  }
+  await redis.disconnect();
+}
+
+
+module.exports = {
+  RedisClient,
+};