クリーンアーキテクチャっぽいプログラムをSwiftで書いてみた

DDDもクリーンアーキテクチャもまだ完全に理解すらしていませんが、それっぽいものをSwift(iOSアプリ)で書いてみたので公開します。

mySampleApp
|-Presentation
|  |-ViewController
|  |  |-SampleViewController.swift
|  |
|  |-View
|  |  |-SampleTextView.swift
|
|-Domain
|  |-Service
|  |  |-SampleService.swift
|  |
|  |-Model
|  |  |-GreetingText.swift
|
|-Infra
   |-Repository
      |-SampleRepository.swift
      |-SampleRepositoryImpl.swift

SampleViewController.swift
import SwiftUI

struct SampleViewController: View {
    var body: some View {
SampleTextView()
    }
}

SampleTextView.swift
import SwiftUI

struct SampleTextView: View {
    var body: some View {
        echoGreeting()
    }

// TODO: emitしたい
private func echoGreeting() -> Text {
let sampleService = SampleService(sampleRepository: SampleRepositoryImpl())
let greetingText = sampleService.getGreeting()
return Text(greetingText.toString())
}
}

SampleService.swift
import Foundation

struct SampleService {

private var sampleRepository: SampleRepository

init(sampleRepository: SampleRepository) {
self.sampleRepository = sampleRepository
}

func getGreeting() -> GreetingText {
return self.sampleRepository.getGreeting()
}
}

GreetingText.swift
import Foundation

struct GreetingText {

private var value: String

init(value: String) {
self.value = value
}

func toString() -> String {
return self.value
}
}

Interface

SampleRepository.swift
import Foundation

protocol SampleRepository {
func getGreeting() -> GreetingText
}

Implement

SampleRepositoryImpl.swift
import Foundation

struct SampleRepositoryImpl: SampleRepository {
func getGreeting() -> GreetingText {
return GreetingText(value: "hello")
}
}