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lib/mongodb.ts

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+import { MongoClient, MongoClientOptions } from 'mongodb';
+
+const MONGOHOST = process.env.MONGOHOST || 'localhost';
+const MONGOPORT = process.env.MONGOPORT || '27017';
+const MONGOAUTH = process.env.MONGOAUTH === 'true';
+const MONGOUSRP = process.env.MONGOUSRP || '';
+export const MONGOBASE = process.env.MONGOBASE || 'medizin';
+
+const MONGO_URL = MONGOAUTH
+  ? `mongodb://${MONGOUSRP}@${MONGOHOST}:${MONGOPORT}/?authSource=admin`
+  : `mongodb://${MONGOHOST}:${MONGOPORT}`;
+
+  console.log("auth:", MONGOAUTH, "url:", MONGO_URL)
+const options: MongoClientOptions = {};
+
+let client: MongoClient;
+let clientPromise: Promise<MongoClient>;
+
+declare global {
+  // eslint-disable-next-line no-var
+  var _mongoClientPromise: Promise<MongoClient> | undefined;
+}
+
+if (process.env.NODE_ENV === 'development') {
+  // In development, use a global variable to preserve the connection across HMR reloads
+  if (!global._mongoClientPromise) {
+    client = new MongoClient(MONGO_URL, options);
+    global._mongoClientPromise = client.connect();
+  }
+  clientPromise = global._mongoClientPromise;
+} else {
+  client = new MongoClient(MONGO_URL, options);
+  clientPromise = client.connect();
+}
+
+export default clientPromise;