initial commit

lib/mongodb.ts

@@ -0,0 +1,31 @@
+import { MongoClient } from "mongodb";
+
+if (!process.env.MONGODB_URI) {
+    throw new Error('Invalid environment variable: "MONGODB_URI"');
+}
+
+const uri = process.env.MONGODB_URI
+const options = {}
+
+let client
+let clientPromise: Promise<MongoClient>
+
+if (!process.env.MONGODB_URI) {
+    throw new Error('Please add your Mongo URI to .env.local')
+}
+
+if (process.env.NODE_ENV === 'development') {
+    // In development mode, use a global variable so that the value
+    // is preserved across module reloads caused by HMR (Hot Module Replacement).
+    if (!global._mongoClientPromise) {
+        client = new MongoClient(uri, options)
+        global._mongoClientPromise = client.connect()
+    }
+    clientPromise = global._mongoClientPromise
+} else {
+    // In production mode, it's best to not use a global variable.
+    client = new MongoClient(uri, options)
+    clientPromise = client.connect()
+}
+
+export default clientPromise