connect.mjs

// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import {Connector} from '@google-cloud/cloud-sql-connector';
import knex from 'knex';

export async function connect({ instanceConnectionName, user, databaseName }) {
  const connector = new Connector();
  const clientOpts = await connector.getOptions({
    instanceConnectionName,
    ipType: 'PUBLIC',
    authType: 'IAM',
  });

  const database = knex({
    client: 'pg',
    connection: {
      ...clientOpts,
      user,
      database: databaseName,
    },
  });

  return {
    database,
    async close() {
      await database.destroy();
      connector.close();
    }
  };
};