Setting/#7 DIContainer

Cherrish-iOS/Cherrish-iOS/App/Cherrish_iOSApp.swift

@@ -9,9 +9,15 @@ import SwiftUI
 
 @main
 struct Cherrish_iOSApp: App {
+
+    init() {
+        // TODO: 코디네이터에서 실행하기
+        DIContainer.shared.dependencyInjection()
+    }
+
     var body: some Scene {
         WindowGroup {
-            ContentView()
+            ViewFactory.makeTestView()
         }
     }
 }

Cherrish-iOS/Cherrish-iOS/App/DIContainer+.swift

@@ -0,0 +1,18 @@
+//
+//  AppDIContainer+.swift
+//  Cherrish-iOS
+//
+//  Created by 이나연 on 1/5/26.
+//
+
+import Foundation
+
+extension DIContainer {
+    func dependencyInjection() {
+        let dataDependencyAssembler = DataDependencyAssembler()
+        let domainDependencyAssembler = DomainDependencyAssembler(preAssembler: dataDependencyAssembler)
+        let presentationDependencyAssembler = PresentationDependencyAssembler(preAssembler: domainDependencyAssembler)
+
+        presentationDependencyAssembler.assemble()
+    }
+}

Cherrish-iOS/Cherrish-iOS/Core/DIContainer.swift

@@ -1,7 +1,35 @@
 //
-//  DIContainer.swift
+//  AppDIContainer.swift
 //  Cherrish-iOS
 //
 //  Created by 이나연 on 12/31/25.
 //
 
+import Foundation
+
+protocol DependencyAssembler {
+    func assemble()
+}
+
+final class DIContainer {
+
+    static let shared = DIContainer()
+
+    private init() { }
+
+    private var dependencies: [String: () -> Any] = [:]
+
+    func register<T>(type: T.Type, closure: @escaping () -> T) {
+        let key = String(describing: T.self)
+        dependencies[key] = closure
+    }
+
+    func resolve<T>(type: T.Type) -> T? {
+        let key = String(describing: T.self)
+        guard let closure = dependencies[key] else {
+            return nil
+        }
+
+        return closure() as? T
+    }
+}

Cherrish-iOS/Cherrish-iOS/Data/DataDependencyAssembler.swift

@@ -0,0 +1,16 @@
+//
+//  DataDependencyAssembler.swift
+//  Cherrish-iOS
+//
+//  Created by 이나연 on 1/5/26.
+//
+
+import Foundation
+
+final class DataDependencyAssembler: DependencyAssembler {
+    func assemble() {
+        DIContainer.shared.register(type: TestInterface.self) { 
+            return DefaultTestRepository()
+        }
+    }
+}

Cherrish-iOS/Cherrish-iOS/Data/Repository/TestRepository.swift

@@ -0,0 +1,14 @@
+//
+//  Repository.swift
+//  Cherrish-iOS
+//
+//  Created by 이나연 on 1/3/26.
+//
+
+import Foundation
+
+struct DefaultTestRepository: TestInterface {
+    func test() {
+        print("Repository Test!")
+    }
+}

Cherrish-iOS/Cherrish-iOS/Domain/DomainDependencyAssembler.swift

@@ -0,0 +1,28 @@
+//
+//  DomainDependencyAssembler.swift
+//  Cherrish-iOS
+//
+//  Created by 이나연 on 1/5/26.
+//
+
+import Foundation
+
+final class DomainDependencyAssembler: DependencyAssembler {
+    private let preAssembler: DependencyAssembler
+
+    init(preAssembler: DependencyAssembler) {
+        self.preAssembler = preAssembler
+    }
+
+    func assemble() {
+        preAssembler.assemble()
+
+        guard let testRepository = DIContainer.shared.resolve(type: TestInterface.self) else {
+            return
+        }
+
+        DIContainer.shared.register(type: TestUseCase.self) {
+            return DefaultTestUseCase(repository: testRepository)
+        }
+    }
+}

Cherrish-iOS/Cherrish-iOS/Domain/Interface/Interface.swift → Cherrish-iOS/Cherrish-iOS/Domain/Interface/TestInterface.swift

@@ -6,3 +6,7 @@
 //
 
 import Foundation
+
+protocol TestInterface {
+    func test()
+}

Cherrish-iOS/Cherrish-iOS/Domain/UseCase/TestUseCase.swift

@@ -0,0 +1,25 @@
+//
+//  Usecase.swift
+//  Cherrish-iOS
+//
+//  Created by 이나연 on 1/3/26.
+//
+
+import Foundation
+
+protocol TestUseCase {
+    func execute()
+}
+
+struct DefaultTestUseCase: TestUseCase {
+    private let repository: TestInterface
+
+    init(repository: TestInterface) {
+        self.repository = repository
+    }
+
+    func execute() {
+        self.repository.test()
+        print("UseCase execute")
+    }
+}

Cherrish-iOS/Cherrish-iOS/Presentation/Feature/TestView.swift

@@ -0,0 +1,23 @@
+//
+//  ContentView.swift
+//  Cherrish-iOS
+//
+//  Created by 이나연 on 12/31/25.
+//
+
+import SwiftUI
+
+struct TestView: View {
+    @ObservedObject var viewModel: TestViewModel
+
+    var body: some View {
+        VStack {
+            Button(action:  {
+                viewModel.test()
+            }) {
+                Text("\(viewModel.text)")
+            }
+            .padding()
+        }
+    }
+}

Cherrish-iOS/Cherrish-iOS/Presentation/Feature/TestViewModel.swift

@@ -0,0 +1,23 @@
+//
+//  TestViewModel.swift
+//  Cherrish-iOS
+//
+//  Created by 이나연 on 1/5/26.
+//
+
+import Foundation
+
+final class TestViewModel: ObservableObject {
+    @Published var text: String = "터치해보세여"
+    private let testUseCase: TestUseCase
+
+    init(testUseCase: TestUseCase) {
+        self.testUseCase = testUseCase
+    }
+
+    func test() {
+        testUseCase.execute()
+        text = "버튼 터치했음!"
+        print("view model execute")
+    }
+}

Cherrish-iOS/Cherrish-iOS/Presentation/PresentationDependencyAssembler.swift

@@ -0,0 +1,31 @@
+//
+//  PresentationDependencyAssembler.swift
+//  Cherrish-iOS
+//
+//  Created by 이나연 on 1/5/26.
+//
+
+import Foundation
+
+final class PresentationDependencyAssembler: DependencyAssembler {
+    private let preAssembler: DependencyAssembler
+
+    init(preAssembler: DependencyAssembler) {
+        self.preAssembler = preAssembler
+    }
+
+    func assemble() {
+        preAssembler.assemble()
+
+        guard let testUseCase = DIContainer.shared.resolve(type: TestUseCase.self) else {
+            return
+        }
+
+        DIContainer.shared.register(type: TestViewModel.self) {
+            print("뷰모델 등록")
+            return TestViewModel(testUseCase: testUseCase)
+        }
+    }
+
+
+}

Cherrish-iOS/Cherrish-iOS/Presentation/ViewFactory.swift

@@ -0,0 +1,22 @@
+//
+//  ViewFactory.swift
+//  Cherrish-iOS
+//
+//  Created by 이나연 on 1/5/26.
+//
+
+import Foundation
+
+protocol ViewFactoryProtocol {
+    static func makeTestView() -> TestView
+}
+
+final class ViewFactory: ViewFactoryProtocol {
+    static func makeTestView() -> TestView {
+        guard let viewModel = DIContainer.shared.resolve(type: TestViewModel.self) else {
+            // TODO: DI 실패 시 기본으로 갈 곳 지정 
+            fatalError()
+        }
+        return TestView(viewModel: viewModel)
+    }
+}