feat: add mongodb lib

Author: MikaelVallenet

Diff for: .env

@@ -1 +1,3 @@
-API_KEY=xx_xxx_xxxxxxx-xxxx-xxxx-xxxxxxxxxx
+API_KEY=sk_live_c5a297ee-11b8-49cb-87e6-dc2cf55e88fc
+MONGODB_URI=mongodb+srv://licenka:[email protected]/?retryWrites=true&w=majority
+DB_NAME=licenka

Diff for: lib/mongodb.js

@@ -0,0 +1,41 @@
+import { MongoClient } from 'mongodb';
+
+const MONGODB_URI = process.env.MONGODB_URI;
+const MONGODB_DB = process.env.DB_NAME;
+
+if (!MONGODB_URI) {
+    throw new Error('Define the MONGODB_URI environmental variable');
+}
+
+if (!MONGODB_DB) {
+    throw new Error('Define the MONGODB_DB environmental variable');
+}
+
+let cachedClient = null;
+let cachedDb = null;
+
+export async function connectToDatabase() {
+    if (cachedClient && cachedDb) {
+        return {
+            client: cachedClient,
+            db: cachedDb,
+        };
+    }
+
+    const opts = {
+        useNewUrlParser: true,
+        useUnifiedTopology: true,
+    };
+
+    let client = new MongoClient(MONGODB_URI, opts);
+    await client.connect();
+    let db = client.db(MONGODB_DB);
+
+    cachedClient = client;
+    cachedDb = db;
+
+    return {
+        client: cachedClient,
+        db: cachedDb,
+    };
+}