mongodb.ts

/* eslint-disable */

import mongoose from "mongoose";

const MONGODB_URI = process.env.MONGODB_URI;

if (!MONGODB_URI) {
  throw new Error("Please define the MONGODB_URI environment variable");
}
// Define the type for our cached mongoose connection
declare global {
  var mongoose:
    | {
        conn: typeof mongoose | null;
        promise: Promise<typeof mongoose> | null;
      }
    | undefined;
}

let cached = global.mongoose;

if (!cached) {
  cached = global.mongoose = { conn: null, promise: null };
}

export async function connectToDatabase() {
  // Now TypeScript knows cached is defined
  cached = cached || { conn: null, promise: null };

  if (cached.conn) {
    return cached.conn;
  }

  if (!cached.promise) {
    const opts = {
      bufferCommands: false,
    };

    cached.promise = mongoose
      .connect(MONGODB_URI as string, opts)
      .then(() => cached);
  }

  try {
    cached.conn = await cached.promise;
  } catch (e) {
    cached.promise = null;
    throw e;
  }

  return cached.conn;
}