Function selectByEmail

packages/core/api/src/admin/reads.ts:297–309

(
  directory: AdminUserDirectory,
  email: string,
  options: AdminUsersListOptions,
  read: (externalId: string) => Effect.Effect<T | null, AdminUsersError>,
)

 * "absent" the single-user path reports, not a storage fault.
 */
const selectByEmail = <T>(
  directory: AdminUserDirectory,
  email: string,
  options: AdminUsersListOptions,
  read: (externalId: string) => Effect.Effect<T | null, AdminUsersError>,
): Effect.Effect<readonly T[], AdminUsersError> =>
  Effect.gen(function* () {
    // An email no directory can resolve matches nothing, and costs no read.
    const wanted = yield* resolveEmailFilter(directory, email);
    if (wanted === null) return [];
    const row = yield* read(wanted);
    return row === null ? [] : pageOf([row], options);
  });

/**
 * The `?search=` read: FILTER by the directory, then PAGE through storage.