TronaldDump

Build & Run

• Xcode 11 & Swift 5
• Open TronaldDump.xcworkspace

App

• gets the tags on load from the API
• when a tag gets selected, the details screen gets shown
• tapping on a detail, goes to the source
• tries to load more details, using the next link from the previous response

Architecture

MVVM-C as the architecture

• ViewModel contains the business logic, requests data from the Api and converts the model to properties for the view to use
• ViewModels communicate to the ViewController using the delegate pattern. The ViewModel has a weak reference to a ViewModelDelegate which the ViewController implements.
• FlowCoordinator is used to go from different screens and pass data and dependencies.
• Flow is passed to the ViewModel. This is an abstraction of the FlowCoordinator, which can be used to mock in unit tests. ViewModel calls to flow to change screens.
• ViewModel communicates with the API via Actions. Actions is an abstraction to Services. This can be used to mock in unit tests as well.

Service

• Service is responsible for either getting the value from the API, if it fails it will try to get the value from the local storage
• It is also responsible for converting the data from the API request or Local storage to the App Models.
• If the request to the API is successful, it would be stored locally.
• The API request is the source of truth. The local storage is only used if there is no internet.

API

• Responses are data transfer objects used to decode the API Response. This decouples API shape changes to Model changes.
• The goal of decoupling is that the API group can ideally be moved to a different famework

Offline or Local storage

• CoreData is used to store tags and details that the user has previously visited.
• CoreData models are prefixed with Data. This also decouples changes to the local storage (for ex. going to Realm) throughout the app.

3rd party libraries

• Uses Cocoapods as a dependency manager
• Bright Futures for handling of asynchronous calls. This can be replaced by using delegates or the completion handlers / blocks.
• SnapKit is used as a DSL for ease in doing autolayout, this can be replaced by doing AutoLayout contraints natively.

Improvements

• Some improvements are listed as comments
• UI Testing
• Include more information on the details