[Feature] 구글 로그인 구현

.gitignore

@@ -1,3 +1,6 @@
+### Configuration ###
+Configuration/
+
 ### Firebase ###
 GoogleService-Info*.plist
 

Core/DesignSystem/DesignSystem.xcodeproj/project.pbxproj

@@ -272,6 +272,7 @@
 			buildSettings = {
 				ALLOW_TARGET_PLATFORM_SPECIALIZATION = YES;
 				BUILD_LIBRARY_FOR_DISTRIBUTION = YES;
+				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = 5DFZR8RCQR;
@@ -314,6 +315,7 @@
 			buildSettings = {
 				ALLOW_TARGET_PLATFORM_SPECIALIZATION = YES;
 				BUILD_LIBRARY_FOR_DISTRIBUTION = YES;
+				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = 5DFZR8RCQR;

Mark-In.xcodeproj/project.pbxproj

@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		57944D0C2DC52AEF00EF3D9A /* GoogleSignIn in Frameworks */ = {isa = PBXBuildFile; productRef = 57944D0B2DC52AEF00EF3D9A /* GoogleSignIn */; };
 		57AC56A22DA5120600BA84BD /* DesignSystem.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 57AC56A12DA511F800BA84BD /* DesignSystem.framework */; };
 		57AC56A32DA5120600BA84BD /* DesignSystem.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 57AC56A12DA511F800BA84BD /* DesignSystem.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		57AC56A42DA5120600BA84BD /* LinkMetadataKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 57AC567D2DA511F200BA84BD /* LinkMetadataKit.framework */; };
@@ -103,6 +104,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				57AC56A82DA5120600BA84BD /* Util.framework in Frameworks */,
+				57944D0C2DC52AEF00EF3D9A /* GoogleSignIn in Frameworks */,
 				57E1F9852DA8F9B40033F30C /* FirebaseAuth in Frameworks */,
 				57AC56A62DA5120600BA84BD /* LinkMetadataKitInterface.framework in Frameworks */,
 				57AC56A42DA5120600BA84BD /* LinkMetadataKit.framework in Frameworks */,
@@ -211,6 +213,7 @@
 				57E1F9862DA8F9B40033F30C /* FirebaseCore */,
 				57E1F9882DA8F9B40033F30C /* FirebaseFirestore */,
 				57B5F82D2DC08B400061F0DE /* FirebaseStorage */,
+				57944D0B2DC52AEF00EF3D9A /* GoogleSignIn */,
 			);
 			productName = "Mark-In";
 			productReference = 57BFD8C32DA4E19600648AD4 /* Mark-In.app */;
@@ -242,6 +245,7 @@
 			minimizedProjectReferenceProxies = 1;
 			packageReferences = (
 				57E1F9832DA8F9B40033F30C /* XCRemoteSwiftPackageReference "firebase-ios-sdk" */,
+				57944D0A2DC52AEF00EF3D9A /* XCRemoteSwiftPackageReference "GoogleSignIn-iOS" */,
 			);
 			preferredProjectObjectVersion = 77;
 			productRefGroup = 57BFD8C42DA4E19600648AD4 /* Products */;
@@ -321,6 +325,8 @@
 /* Begin XCBuildConfiguration section */
 		57BFD8CD2DA4E19700648AD4 /* Debug */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReferenceAnchor = 57BFD8C52DA4E19600648AD4 /* Mark-In */;
+			baseConfigurationReferenceRelativePath = Configuration/Debug.xcconfig;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
@@ -383,6 +389,8 @@
 		};
 		57BFD8CE2DA4E19700648AD4 /* Release */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReferenceAnchor = 57BFD8C52DA4E19600648AD4 /* Mark-In */;
+			baseConfigurationReferenceRelativePath = Configuration/Release.xcconfig;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
@@ -541,6 +549,14 @@
 /* End XCConfigurationList section */
 
 /* Begin XCRemoteSwiftPackageReference section */
+		57944D0A2DC52AEF00EF3D9A /* XCRemoteSwiftPackageReference "GoogleSignIn-iOS" */ = {
+			isa = XCRemoteSwiftPackageReference;
+			repositoryURL = "https://github.com/google/GoogleSignIn-iOS";
+			requirement = {
+				kind = exactVersion;
+				version = 7.0.0;
+			};
+		};
 		57E1F9832DA8F9B40033F30C /* XCRemoteSwiftPackageReference "firebase-ios-sdk" */ = {
 			isa = XCRemoteSwiftPackageReference;
 			repositoryURL = "https://github.com/firebase/firebase-ios-sdk";
@@ -552,6 +568,11 @@
 /* End XCRemoteSwiftPackageReference section */
 
 /* Begin XCSwiftPackageProductDependency section */
+		57944D0B2DC52AEF00EF3D9A /* GoogleSignIn */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = 57944D0A2DC52AEF00EF3D9A /* XCRemoteSwiftPackageReference "GoogleSignIn-iOS" */;
+			productName = GoogleSignIn;
+		};
 		57B5F82D2DC08B400061F0DE /* FirebaseStorage */ = {
 			isa = XCSwiftPackageProductDependency;
 			package = 57E1F9832DA8F9B40033F30C /* XCRemoteSwiftPackageReference "firebase-ios-sdk" */;

Mark-In/Resources/Info.plist

@@ -1,5 +1,21 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
-<dict/>
+<dict>
+	<key>GIDClientID</key>
+	<string>$(GID_CLIENT)</string>
+	<key>CFBundleURLTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeRole</key>
+			<string>Editor</string>
+			<key>CFBundleURLName</key>
+			<string>$(URL_SCHEMES)</string>
+			<key>CFBundleURLSchemes</key>
+			<array>
+				<string>$(URL_SCHEMES)</string>
+			</array>
+		</dict>
+	</array>
+</dict>
 </plist>

Mark-In/Sources/App/Mark_InApp.swift

@@ -8,6 +8,7 @@
 import SwiftUI
 
 import FirebaseCore
+import GoogleSignIn
 
 import DesignSystem
 
@@ -17,19 +18,23 @@ struct Mark_InApp: App {
   init() {
     FontLoader.registerFont()
 
-    //    Self.configureFirebase()
+    configureFirebase()
+    configureGoogleSignIn()
   }
 
   var body: some Scene {
     WindowGroup {
       MainView()
         .frame(minWidth: 500, minHeight: 500)
+        .onOpenURL { url in
+          GIDSignIn.sharedInstance.handle(url)
+        }
     }
   }
 }
 
 extension Mark_InApp {
-  static func configureFirebase() {
+  private func configureFirebase() {
 #if DEBUG
     let resource = "GoogleService-Info-Dev"
 #else
@@ -45,4 +50,12 @@ extension Mark_InApp {
 
     FirebaseApp.configure(options: options)
   }
+
+  private func configureGoogleSignIn() {
+    guard let clientID = FirebaseApp.app()?.options.clientID else {
+      fatalError("No client ID found in Firebase configuration")
+    }
+    let config = GIDConfiguration(clientID: clientID)
+    GIDSignIn.sharedInstance.configuration = config
+  }
 }

Mark-In/Sources/Feature/Login/LoginView.swift

@@ -110,6 +110,7 @@ private struct SignInButtonList: View {
 
       SignInButton(provider: .google) {
         // TODO: 구글 로그인 로직
+        loginViewModel.send(.googleLoginButtonTapped)
       }
     }
   }

Mark-In/Sources/Feature/Login/LoginViewModel.swift

@@ -10,6 +10,7 @@ import AuthenticationServices
 import SwiftUI
 
 import FirebaseAuth
+import GoogleSignIn
 
 import Util
 
@@ -21,6 +22,7 @@ final class LoginViewModel: Reducer {
 
   enum Action {
     case appleLoginButtonTapped(AuthorizationController)
+    case googleLoginButtonTapped
 
     case signInError(SignInError)
 
@@ -48,15 +50,15 @@ final class LoginViewModel: Reducer {
       return .run { [nonce = requestProvider.currentNonce] in
 
         /// 중간에 로그인을 취소하거나, 애플 로그인 인증 방식이 아닌 경우는 빈 액션 반환
-        /// (에러 상황은 아니고, 어떠한 액션을 던질 필요가 없음)
+        /// (에러 상황은 아니기 때문에 어떠한 액션을 던질 필요가 없음)
         guard let result = try? await authController.performRequest(request),
               case let .appleID(idCredential) = result else { return .empty }
 
         /// 애플 로그인 정보에 필요한 정보들이 누락되는 경우
         guard let nonce,
               let appleIDToken = idCredential.identityToken,
               let idTokenString = String(data: appleIDToken, encoding: .utf8) else {
-          return .signInError(.invalid)
+          return .signInError(.missingData)
         }
 
         /// Firebase 인증 요청을 위한 AuthCredential 생성
@@ -69,11 +71,39 @@ final class LoginViewModel: Reducer {
         return .firebaseAuthRequest(credential)
       }
 
-    // TODO: 에러 처리 필요
+    case .googleLoginButtonTapped:
+
+      guard let windowScene = NSApplication.shared.windows.first else {
+        return .none
+      }
+
+      return .run {
+        do {
+          /// 구글 로그인 요청
+          let result = try await GIDSignIn.sharedInstance.signIn(withPresenting: windowScene)
+
+          /// 로그인에 필요한 정보(IDToken)가 누락된 경우
+          guard let idToken = result.user.idToken?.tokenString else {
+            return .signInError(.missingData)
+          }
+
+          /// Firebase 인증 요청을 위한 AuthCredential 생성
+          let credential = GoogleAuthProvider.credential(
+            withIDToken: idToken,
+            accessToken: result.user.accessToken.tokenString
+          )
+
+          return .firebaseAuthRequest(credential)
+        } catch {
+          return .signInError(.invalid)
+        }
+      }
+
+      // TODO: 에러 처리 필요
     case .signInError(_):
       return .none
 
-    // TODO: 현재는 러프하고 구현된 상태. 구글 로그인까지 구현 후 디테일 수정
+      // TODO: 구글 로그인까지 구현 후 디테일 수정
     case .firebaseAuthRequest(let credential):
       return .run {
         do {
@@ -109,14 +139,15 @@ final class LoginViewModel: Reducer {
     case .run(let action):
       Task {
         let newAction = await action()
-        send(newAction)
+        await send(newAction)
       }
     }
   }
 }
 
 extension LoginViewModel {
   enum SignInError: Error {
+    case missingData
     case invalid
   }
 }