First public commit

utils/mongodb-client.ts

@@ -0,0 +1,32 @@
+// Import the dependency.
+import { MongoClient } from "mongodb";
+
+declare global {
+  // allow global `var` declarations
+  // eslint-disable-next-line no-var
+  var _mongoClientPromise: Promise<MongoClient>;
+}
+
+const uri = process.env.LEGACY_MONGODB_URI;
+
+let client;
+let clientPromise;
+
+export const getMongoClient = async () => {
+  if (!uri) {
+    return;
+  }
+
+  if (global._mongoClientPromise) {
+    return global._mongoClientPromise;
+  }
+
+  client = new MongoClient(uri);
+  clientPromise = client.connect();
+
+  if (process.env.NODE_ENV === "development") {
+    global._mongoClientPromise = clientPromise;
+  }
+
+  return clientPromise;
+};