Migrated auth to Nitro

server/utils/database.ts

@@ -0,0 +1,48 @@
+import mongoose from "mongoose"
+
+let connectionPromise: Promise<typeof mongoose> | undefined
+
+/**
+ * Connect to the application's shared Mongoose instance.
+ * Concurrent callers share the same connection attempt, and failed attempts
+ * can be retried after the underlying cause has been corrected.
+ */
+export function connectToDatabase(uri: string): Promise<typeof mongoose> {
+	if (!uri) {
+		return Promise.reject(new Error("MongoDB runtime configuration is missing"))
+	}
+
+	if (mongoose.connection.readyState === 1) {
+		return Promise.resolve(mongoose)
+	}
+
+	if (connectionPromise) {
+		return connectionPromise
+	}
+
+	if (mongoose.connection.readyState === 2) {
+		connectionPromise = mongoose.connection
+			.asPromise()
+			.then(() => mongoose)
+			.catch((error: unknown) => {
+				throw error
+			})
+			.finally(() => {
+				connectionPromise = undefined
+			})
+
+		return connectionPromise
+	}
+
+	connectionPromise = mongoose
+		.connect(uri)
+		.then(() => mongoose)
+		.catch((error: unknown) => {
+			throw new Error("MongoDB connection failed", { cause: error })
+		})
+		.finally(() => {
+			connectionPromise = undefined
+		})
+
+	return connectionPromise
+}