Eris

Name Eris is inspired from here

Architecture

Architecture is divided in the following independently injectable and testable layers.

Layers are defined here.

Coordinator

Application Screenflow and later Push Routing handler.

View

Display of data. Data is being displayed in the form of Models and views confrom to ModelConfigurable to populate data via configure(model:) method

ViewController

Controller contains logic of view's state representation and pass actions to viewModel

ViewModel

• ViewModel does all the business logic implementation with or without help of mappers.
• Also it informs view-controller about the state update via bindings.
• Mapper are the Domain Usecases. Any domain logic will be injected in the form of independently tested usecases. Idea is to keep Domain-Layer independent from ViewModels thus can be widely reuseable. Current implementation doesn't contain any domain logic thus doesn't contain any mapper.

Repository

Its an abstraction layer between ViewModel and Data Stores that encapuslates Data-source layer. Currently there are two data sources, Network and CoreData. This layer can encapulate further data sources aswel i-e Remote Configurations etc

Interactor

Network: Its a wrapper written on top of Swift Package Ceres which fetch and decode data into inferred model object.

Persistor

CoreData: Persistor encapsulates CoreData and fetches and updates data.

Considerations

Following are few considerations while writing code

• Code is following MVVM-C Architecture.
• Every layer is interfaced via dependency management and lays foundation for high level DI-Framework
• Code is testable and mocks can easily replaced with original objects
• Code is following iOS Swift Style Guidelines and have same styling throughtout the code.
• Project is structured to scale as big as it can be
• Folder structure is highligting the architecture
• Network is implemented as an independent Module (Swift Package)
• Layers are interfaced together via Protocols
• Dependency resolution is being done via Factory.

Testing Notes

• NWPath.Status doesn't return .satisfied on simulator so for getting best results please test on device.

Notes

A detailed article was published on Medium and can be found here