sebskuse / stackoverflowtopusers Goto Github PK

A sample project with zero dependencies showing how to retrieve and show the top list of users from the StackOverflow API.

I've included a sample response in the testing bundle so we can validate tests against a known response and not hit the network. Before writing any code, I tend to inspect an API using Paw. In the past i've set up team instances of this so we can share API structures, add upcoming API requests etc.

Models are decoded off the network using Swift's Decodable mechanism.

A thin wrapper around URLSession for testability. Requests made to the network conform to Request, and responses are decoded using Parsable - both Codable objects and custom responses (such as from an image request).

TopUsersRequest conforms to the Request protocol, which describes a call that can be made to the network.

Contexts wrap data fetching functionality for a View Model, creating a separation between making a network request and receiving data. These can be stubbed out in tests to just return the data.

When launching, the HomeViewModel receives a request from the HomeViewController to fetch users. These are then passed to the HomeDataSource, which understands how to enrich them with local state that the UserCell can handle (expanded state, blocked, followed, etc).

I'll often use something like Bond to make this binding easier - negating the need for the datasource.

Profile images are requested as the cells dequeue using a ProfileImageContext, which uses Session underneath.