From f1df98e25334c59a09f7e609a969610b57358a5c Mon Sep 17 00:00:00 2001
From: kim-seonwoo <sw204011@gmail.com>
Date: Wed, 9 Oct 2024 15:49:03 +0900
Subject: [PATCH] [Feat/#91] LoginViewModel Refactor

---
 .../Feature/LoginViewModel_Refactor.swift     | 115 ++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 HMH_Tuist_iOS/Projects/Features/LoginFeature/Sources/Refactor_LoginFeature_Combine/Feature/LoginViewModel_Refactor.swift

diff --git a/HMH_Tuist_iOS/Projects/Features/LoginFeature/Sources/Refactor_LoginFeature_Combine/Feature/LoginViewModel_Refactor.swift b/HMH_Tuist_iOS/Projects/Features/LoginFeature/Sources/Refactor_LoginFeature_Combine/Feature/LoginViewModel_Refactor.swift
new file mode 100644
index 00000000..5385cf99
--- /dev/null
+++ b/HMH_Tuist_iOS/Projects/Features/LoginFeature/Sources/Refactor_LoginFeature_Combine/Feature/LoginViewModel_Refactor.swift
@@ -0,0 +1,115 @@
+//
+//  LoginViewModel_refactore.swift
+//  LoginFeatureInterface
+//
+//  Created by Seonwoo Kim on 10/9/24.
+//  Copyright © 2024 HMH-iOS. All rights reserved.
+//
+
+import Combine
+import Core
+import DSKit
+import AuthenticationServices
+import KakaoSDKUser
+
+class LoginViewModel_Refactor: NSObject, ObservableObject {
+    
+    private var useCase: LoginUseCaseType
+    private var cancelBag = CancelBag()
+    
+    @Published private(set) var state = State(
+        loginStatus: .loginFailure
+    )
+    
+    init(useCase: LoginUseCaseType) {
+        self.useCase = useCase
+    }
+    
+    enum Action {
+        case kakaoLoginDidTap
+        case appleLoginDidTap
+    }
+    
+    struct State {
+        var loginStatus: LoginResponseType
+    }
+    
+    func send(action: Action) {
+        switch action {
+        case .kakaoLoginDidTap:
+            handleKakaoLogin()
+        case .appleLoginDidTap:
+            handleAppleLogin()
+        }
+    }
+    
+    private func handleKakaoLogin() {
+        if (UserApi.isKakaoTalkLoginAvailable()) {
+            UserApi.shared.loginWithKakaoTalk { [weak self] (oauthToken, error) in
+                if let error = error {
+                    print("Kakao login error: \(error)")
+                    return
+                }
+                if let oauthToken = oauthToken {
+                    let idToken = oauthToken.accessToken
+                    let token = "Bearer " + idToken
+                    self?.requestLoginWithSocialToken(platform: "KAKAO", token: token)
+                }
+            }
+        } else {
+            UserApi.shared.loginWithKakaoAccount { [weak self] (oauthToken, error) in
+                if let error = error {
+                    print("Kakao account login error: \(error)")
+                    return
+                }
+                if let oauthToken = oauthToken {
+                    let idToken = oauthToken.accessToken
+                    let token = "Bearer " + idToken
+                    self?.requestLoginWithSocialToken(platform: "KAKAO", token: token)
+                }
+            }
+        }
+    }
+    
+    private func handleAppleLogin() {
+        let request = ASAuthorizationAppleIDProvider().createRequest()
+        request.requestedScopes = [.fullName, .email]
+        
+        let authorizationController = ASAuthorizationController(authorizationRequests: [request])
+        authorizationController.delegate = self
+        authorizationController.performRequests()
+    }
+    
+    private func requestLoginWithSocialToken(platform: String, token: String) {
+        useCase.requestLogin(platform: platform, socialToken: token)
+            .sink { _ in
+            } receiveValue: {_ in 
+                bindLoginResponse()
+            }.store(in: cancelBag)
+    }
+    
+    private func bindLoginResponse() {
+        useCase.loginResponse
+            .sink(receiveCompletion: { _ in }, receiveValue: { [weak self] response in
+                self?.state.loginStatus = response
+            }).store(in: cancelBag)
+    }
+}
+
+extension LoginViewModel_Refactor: ASAuthorizationControllerDelegate {
+    
+    func authorizationController(controller: ASAuthorizationController, didCompleteWithAuthorization authorization: ASAuthorization) {
+        if let appleIDCredential = authorization.credential as? ASAuthorizationAppleIDCredential {
+            guard let identityToken = appleIDCredential.identityToken,
+                  let idTokenString = String(data: identityToken, encoding: .utf8) else {
+                print("Failed to get Apple ID token")
+                return
+            }
+            requestLoginWithSocialToken(platform: "APPLE", token: idTokenString)
+        }
+    }
+    
+    func authorizationController(controller: ASAuthorizationController, didCompleteWithError error: Error) {
+        print("Apple login error: \(error.localizedDescription)")
+    }
+}