CountriesVIP

VIP (View–Interactor–Presenter) architecture — a modern Swift rewrite of the classic countries assignment, styled for fintech portfolio demos.

Highlights

Area	Implementation
VIP	Strict View → Interactor → Presenter boundaries
Concurrency	async/await country fetch
UI	Dark fintech presentation layer
Testing	Interactor unit tests without SwiftUI

VIP layers

Layer	Type	Role
View	CountriesView	SwiftUI, user events, renders state
Interactor	CountriesInteractor	Business logic, async data fetch
Presenter	CountriesPresenter	Formats data for the view
Entity	Country	Plain models
Router	(inline in app shell)	Navigation wiring

Data flows View → Interactor → Presenter → View; the interactor never imports SwiftUI.

Architecture

flowchart LR
    V[CountriesView] --> I[CountriesInteractor]
    I --> P[CountriesPresenter]
    P --> V
    I --> API[Country API / mock]

Loading

Screenshots

Replace docs/screenshots/countries-list.png with a loaded list capture (see docs/screenshots/README.md).

Countries list

Screen recordings: Simulator → Record Screen.

Build & run

xcodegen generate
open CountriesVIP.xcodeproj
# iPhone simulator → ⌘R

CI: xcodebuild -project CountriesVIP.xcodeproj -scheme CountriesVIP -destination 'generic/platform=iOS Simulator' CODE_SIGNING_ALLOWED=NO build

Tests: ⌘U.

Revolut-relevant signals

• Strict layer boundaries (testable interactors)
• async/await loading
• Presentation separated from domain logic
• Portfolio-friendly VIP reference implementation

Fintech-inspired — not affiliated with Revolut Ltd.