피드 상세화면에 필요한 Domain영역과 Data 영역을 정의해 보았습니다.

HomeCafeRecipes/HomeCafeRecipes/Domain/Interactor/RecipeDetailInteractor.swift

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+//
+//  RecipeDetailInteractor.swift
+//  HomeCafeRecipes
+//
+//  Created by 김건호 on 6/27/24.
+//
+
+import Foundation
+import RxSwift
+
+protocol RecipeDetailInteractorDelegate: AnyObject {
+    func fetchedRecipe(result: Result<Recipe, Error>)
+}
+
+protocol InputRecipeDetailInteractor {
+    func viewDidLoad()
+}
+
+protocol OutputRecipeDetailInteractor {
+    var recipe: Observable<Result<Recipe, Error>> { get }
+}
+
+class RecipeDetailInteractor: InputRecipeDetailInteractor, OutputRecipeDetailInteractor {
+
+    private let fetchRecipeDetailUseCase: FetchRecipeDetailUseCase
+    private let recipeID: Int
+    private let disposeBag = DisposeBag()
+    private let recipeDetailSubject = PublishSubject<Result<Recipe, Error>>()
+    weak var delegate: RecipeDetailInteractorDelegate?
+
+    var recipe: Observable<Result<Recipe, Error>> {
+        return recipeDetailSubject.asObservable()
+    }
+
+    init(fetchRecipeDetailUseCase: FetchRecipeDetailUseCase, recipeID: Int) {
+        self.fetchRecipeDetailUseCase = fetchRecipeDetailUseCase
+        self.recipeID = recipeID
+    }
+
+    func setDelegate(_ delegate: RecipeDetailInteractorDelegate) {
+        self.delegate = delegate
+        bindOutputs()
+    }
+
+    private func bindOutputs() {
+        recipe
+            .subscribe(onNext: { [weak self] result in
+                self?.delegate?.fetchedRecipe(result: result)
+            })
+            .disposed(by: disposeBag)
+    }
+
+    func viewDidLoad() {
+        fetchRecipeDetail()
+    }
+
+    private func fetchRecipeDetail() {
+        fetchRecipeDetailUseCase.execute(recipeID: recipeID)
+            .subscribe { [weak self] result in
+                self?.handleResult(result)
+            }
+            .disposed(by: disposeBag)
+    }
+
+    private func handleResult(_ result: Result<Recipe, Error>) {
+        switch result {
+        case .success(let recipe):
+            self.recipeDetailSubject.onNext(.success(recipe))
+        case .failure(let error):
+            self.recipeDetailSubject.onNext(.failure(error))
+        }
+    }
+}