SWVL Challenge

A demo app for SWVL:

• The app architecture is MVC and follows Cocoa design patterns whenever fit.

• Views are composed of storyboards and custom xib.

• A single ViewController that manages and ties everything together.

• The model consists of a singleton Lines class which provides a globally accessible, shared instance. It has the property linesList which is a struct LinesList which consist of an array of a struct Line, which in turn contains a struct Station, which has struct Location. All structs are conforming to Codable protocol which helps converting them at ease to and from external representations such as JSON.

• All networking are done via the singleton class of NetworkManager, which is a unified access point to make HTTP requests. And each type of request is done via a dedicated method.

• When the main view controller MapViewController first loaded, it subscribes to a custom Notification, then asks the Lines model via its singleton instance to fetch the lines, which in turn fetches them via the API using the NetworkManager. And then posts a notification using the NotificationCenter via property observer. The notification is received by the subscribed MapViewController and refreshes the lines asynchronously.