Allowing PS_MONGO_URI to be a 3-replica set URI

[whygee-dev]

Currently the logic behind normalizing mongo config does not handle properly a 3-replica set URI

export function normalizeMongoConfig(options: BaseMongoConfigDecoded) {
  let uri = urijs.parse(options.uri);

  const database = options.database ?? uri.path?.substring(1) ?? '';

  const userInfo = uri.userinfo?.split(':');

  const username = options.username ?? userInfo?.[0];
  const password = options.password ?? userInfo?.[1];

  if (database == '') {
    throw new ServiceError(ErrorCode.PSYNC_S1105, `MongoDB connection: database required`);
  }

  delete uri.userinfo;

  const lookupOptions: LookupOptions = {
    reject_ip_ranges: options.reject_ip_ranges ?? []
  };
  const lookup = makeHostnameLookupFunction(uri.host ?? '', lookupOptions);

  return {
    uri: urijs.serialize(uri),
    database,

    username,
    password,

    lookup
  };
}

For example,

mongodb://mongodb-0.mongodb.powersync.svc.cluster.local:27017,mongodb-1.mongodb.powersync.svc.cluster.local:27017,mongodb-2.mongodb.powersync.svc.cluster.local:27017/powersync_test?replicaSet=rs0 resolves to

{
  database: 'mongodb-1.mongodb.powersync.svc.cluster.local:27017,mongodb-2.mongodb.powersync.svc.cluster.local:27017/powersync_test',
}

I suggest using mongodb-connection-string-url

[whygee-dev]

Opened a PR