yar1vn/employeedirectory

Square take home assignment

Square Take Home Assignment

by Yariv Nissim

Builds Tools and Versions

Xcode 12.4 Swift 5

Libraries

UIKit Combine

Focus Areas

The architecture is a variation of MVVM with unidirectional data flow with Combine. The Employee Directory object fetches the data and returns a FetchState object that's a twist on Result since I wanted an initial state as well (aka none). The UI is updated automatically whenever the state changes (kind of like SwiftUI) in a single method updateUI.

Images are cached using a custom URLCache object defined on a custom URLSession. I decided to prefetch the small images while loading the directory. The images seemed relatively small (~24KB) and they all loaded very quickly even on a cellular connection. The full size images are currently not fetched at all. If there was a detail view then they would be loaded lazily and cached as well.

I created a custom icon as well and used the new UILaunchScreen key in info.plist. I left the main Storyboard even though it only adds a NavigationController. Sometimes less code is better.

Dependencies

None.

Device Focus

The app is universal and will work on iPhones and iPad an either orientation. It also supports dark mode, adaptive text sizes, and localized text.

Work Time

I spent about 6~7 hours on this project.

Anything else?

It's been a while since I built a project from scratch. Tried including some new frameworks like Combine, DiffableDataSource, List Layout, Cell Registration and Configuration.