Network Bound Resource

Generic implementation of the network-bound-resource algorithm in Dart.

Usage

Your repository class should extend NetworkBoundResource.

// For example ...
class MyRepositoryImpl extends NetworkBoundResource implements IMyRepository {}

Then, you can use the fetch() method which returns a stream of Resource objects. For example

Stream<Resource<MapEntry<String, List<String>>>> fetchPackageDependencies(
    String package,
) async* {
    yield* fetch<MapEntry<String, List<String>>, List<String>>(
        fetchFromAPI: () async => await _fetchDependencies(package),
        loadFromDB: () {
            final versions = _mockDB[package];
            return versions != null ? MapEntry(package, versions) : null;
        },
        storeToDB: (entry) => _persistDependencies(entry.key, entry.value),
        shouldFetch: (entry) => entry == null || !_mockDB.containsKey(package),
        mapDTOToEntity: (versions) => MapEntry(package, versions),
    );
}