Data

An in-memory store, a row type, and a mapper. This is where the API client would sit.

clean-architectureflutter

lib/data/notes/. NoteStore is an in-memory list of rows. It stands where an API client would sit. The repository does not call HTTP. The wrapped client in Composition root is ready for that call. The row keeps createdAtMicros. The entity keeps a DateTime.

dart

factory NoteRow.fromNote(Note note) {
  return NoteRow(
    id: note.id,
    title: note.title,
    body: note.body,
    createdAtMicros: note.createdAt.microsecondsSinceEpoch,
  );
}

save appends a row and returns nothing. findAll maps each row with toNote, which uses the Note constructor. Rows here were written after Note.create, so the list keeps a title the domain already accepted. A store that can hold a row create would refuse should follow Infrastructure: run the invariant on load, or fail the load.

The files are lib/data/notes/note_row.dart and lib/data/notes/note_repository_impl.dart.

The same mapping sits at the edge of an HTTP or Serverpod call when the store is no longer memory. flutter test starts no server because the list is the store.

Next: Presentation.