feat: [HL-92] Login <> Handle and integrate login use case 🍕

Domain/Package.swift

@@ -0,0 +1,29 @@
+// swift-tools-version: 5.7
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "Domain",
+    platforms: [.iOS(.v13)],
+    products: [
+        // Products define the executables and libraries a package produces, and make them visible to other packages.
+        .library(
+            name: "Domain",
+            targets: ["Domain"])
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages this package depends on.
+        .target(
+            name: "Domain",
+            dependencies: []),
+        .testTarget(
+            name: "DomainTests",
+            dependencies: ["Domain"])
+    ]
+)

Domain/README.md

@@ -0,0 +1,5 @@
+# Domain
+
+The Domain Layer is a crucial component of a software architecture that represents the 
+core business logic and rules of the application. It acts as the heart of the system, 
+encapsulating all the domain-specific logic and entities.

Domain/Sources/Domain/Entities/User.swift

@@ -0,0 +1,9 @@
+public struct User {
+    public let email: String
+    public let tokenID: String
+
+    public init(email: String, tokenID: String) {
+        self.email = email
+        self.tokenID = tokenID
+    }
+}

Domain/Sources/Domain/UseCases/LoginUseCase.swift

@@ -0,0 +1,3 @@
+public protocol LoginUseCase {
+    func login(email: String, password: String) async throws -> User
+}

Domain/Tests/DomainTests/DomainTests.swift

@@ -0,0 +1,10 @@
+import XCTest
+@testable import Domain
+
+final class DomainTests: XCTestCase {
+    func testExample() throws {
+        // This is an example of a functional test case.
+        // Use XCTAssert and related functions to verify your tests produce the correct
+        // results.
+    }
+}

Healthy.xcodeproj/project.pbxproj

@@ -41,6 +41,8 @@
 		025511D42A3D0A8B00295B91 /* CreateAccountViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 025511CC2A3D0A8B00295B91 /* CreateAccountViewModel.swift */; };
 		025511D52A3D0A8B00295B91 /* CreateAccountviewModelType.swift in Sources */ = {isa = PBXBuildFile; fileRef = 025511CD2A3D0A8B00295B91 /* CreateAccountviewModelType.swift */; };
 		025511D62A3D0A8B00295B91 /* CreateAccountViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 025511CE2A3D0A8B00295B91 /* CreateAccountViewController.swift */; };
+		02557D712A697DF90022756A /* LoginUseCase.swift in Sources */ = {isa = PBXBuildFile; fileRef = 02557D702A697DF90022756A /* LoginUseCase.swift */; };
+		02557D732A697E8E0022756A /* Domain in Frameworks */ = {isa = PBXBuildFile; productRef = 02557D722A697E8E0022756A /* Domain */; };
 		025A47532A336B05008BF85A /* DashboardViewModelType.swift in Sources */ = {isa = PBXBuildFile; fileRef = 025A474F2A336B05008BF85A /* DashboardViewModelType.swift */; };
 		025A47542A336B05008BF85A /* DashboardViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 025A47502A336B05008BF85A /* DashboardViewController.swift */; };
 		025A47552A336B05008BF85A /* DashboardViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 025A47512A336B05008BF85A /* DashboardViewModel.swift */; };
@@ -72,6 +74,7 @@
 		029C89142A71E79A00AF380B /* NewRecipesCollectionViewLayout.swift in Sources */ = {isa = PBXBuildFile; fileRef = 029C89132A71E79A00AF380B /* NewRecipesCollectionViewLayout.swift */; };
 		02C37B862A71CF5600FD58E5 /* NewRecipesView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 02C37B852A71CF5600FD58E5 /* NewRecipesView.swift */; };
 		02C3F8402A71CB3A000E62B2 /* UIView+ReuseIdentifier.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7918F03D2A1F6448000F36A5 /* UIView+ReuseIdentifier.swift */; };
+		02CB9B642A6ADE4E00C1E765 /* DefaultLoginUseCaseTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 02CB9B632A6ADE4E00C1E765 /* DefaultLoginUseCaseTests.swift */; };
 		02EEC3FB2A4C22C90007DA0C /* SavedRecipesViewModelMock.swift in Sources */ = {isa = PBXBuildFile; fileRef = 02EEC3FA2A4C22C90007DA0C /* SavedRecipesViewModelMock.swift */; };
 		02EEC3FD2A4C23090007DA0C /* SavedRecipesViewControllerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 02EEC3FC2A4C23090007DA0C /* SavedRecipesViewControllerTests.swift */; };
 		02EEC3FF2A4C244A0007DA0C /* SavedRecipesViewModelTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 02EEC3FE2A4C244A0007DA0C /* SavedRecipesViewModelTests.swift */; };
@@ -200,6 +203,8 @@
 		025511CC2A3D0A8B00295B91 /* CreateAccountViewModel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CreateAccountViewModel.swift; sourceTree = "<group>"; };
 		025511CD2A3D0A8B00295B91 /* CreateAccountviewModelType.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CreateAccountviewModelType.swift; sourceTree = "<group>"; };
 		025511CE2A3D0A8B00295B91 /* CreateAccountViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CreateAccountViewController.swift; sourceTree = "<group>"; };
+		02557D6E2A697C3D0022756A /* Domain */ = {isa = PBXFileReference; lastKnownFileType = wrapper; path = Domain; sourceTree = "<group>"; };
+		02557D702A697DF90022756A /* LoginUseCase.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoginUseCase.swift; sourceTree = "<group>"; };
 		025A474F2A336B05008BF85A /* DashboardViewModelType.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DashboardViewModelType.swift; sourceTree = "<group>"; };
 		025A47502A336B05008BF85A /* DashboardViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DashboardViewController.swift; sourceTree = "<group>"; };
 		025A47512A336B05008BF85A /* DashboardViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DashboardViewModel.swift; sourceTree = "<group>"; };
@@ -231,6 +236,7 @@
 		029C89112A71E78000AF380B /* NSLayoutConstraint+Helpers.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSLayoutConstraint+Helpers.swift"; sourceTree = "<group>"; };
 		029C89132A71E79A00AF380B /* NewRecipesCollectionViewLayout.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NewRecipesCollectionViewLayout.swift; sourceTree = "<group>"; };
 		02C37B852A71CF5600FD58E5 /* NewRecipesView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NewRecipesView.swift; sourceTree = "<group>"; };
+		02CB9B632A6ADE4E00C1E765 /* DefaultLoginUseCaseTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DefaultLoginUseCaseTests.swift; sourceTree = "<group>"; };
 		02EEC3FA2A4C22C90007DA0C /* SavedRecipesViewModelMock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SavedRecipesViewModelMock.swift; sourceTree = "<group>"; };
 		02EEC3FC2A4C23090007DA0C /* SavedRecipesViewControllerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SavedRecipesViewControllerTests.swift; sourceTree = "<group>"; };
 		02EEC3FE2A4C244A0007DA0C /* SavedRecipesViewModelTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SavedRecipesViewModelTests.swift; sourceTree = "<group>"; };
@@ -321,6 +327,7 @@
 				6D611B9F2A299E3600A1FC65 /* GoogleSignInSwift in Frameworks */,
 				025511B72A3C623000295B91 /* NewRelic in Frameworks */,
 				6DDA138D2A1109E8004390D4 /* Factory in Frameworks */,
+				02557D732A697E8E0022756A /* Domain in Frameworks */,
 				0296F7952A4342B500DBC86A /* FacebookLogin in Frameworks */,
 				6D611B9D2A299E3600A1FC65 /* GoogleSignIn in Frameworks */,
 			);
@@ -457,6 +464,14 @@
 			path = CreateAccount;
 			sourceTree = "<group>";
 		};
+		02557D6F2A697D8E0022756A /* UseCases */ = {
+			isa = PBXGroup;
+			children = (
+				02557D702A697DF90022756A /* LoginUseCase.swift */,
+			);
+			path = UseCases;
+			sourceTree = "<group>";
+		};
 		025A474E2A336AE3008BF85A /* Dashboard */ = {
 			isa = PBXGroup;
 			children = (
@@ -523,6 +538,7 @@
 		027DDA122A0E6A660052818C = {
 			isa = PBXGroup;
 			children = (
+				02557D6E2A697C3D0022756A /* Domain */,
 				02892EC52A585558001A3DB4 /* Networking */,
 				027DDA1D2A0E6A660052818C /* Healthy */,
 				027DDA342A0E6A680052818C /* HealthyTests */,
@@ -597,6 +613,7 @@
 				025511C32A3D058800295B91 /* AppCoordinator.swift */,
 				027DDA1E2A0E6A660052818C /* AppDelegate.swift */,
 				027DDA202A0E6A660052818C /* SceneDelegate.swift */,
+				02557D6F2A697D8E0022756A /* UseCases */,
 			);
 			path = Classes;
 			sourceTree = "<group>";
@@ -680,6 +697,14 @@
 			name = Frameworks;
 			sourceTree = "<group>";
 		};
+		02CB9B5F2A6AD5DD00C1E765 /* LoginUseCase */ = {
+			isa = PBXGroup;
+			children = (
+				02CB9B632A6ADE4E00C1E765 /* DefaultLoginUseCaseTests.swift */,
+			);
+			path = LoginUseCase;
+			sourceTree = "<group>";
+		};
 		02EEC3F92A4C22B70007DA0C /* Mocks */ = {
 			isa = PBXGroup;
 			children = (
@@ -826,6 +851,7 @@
 		6DFEC6202A2E97FF0090B2E2 /* Modules */ = {
 			isa = PBXGroup;
 			children = (
+				02CB9B5F2A6AD5DD00C1E765 /* LoginUseCase */,
 				6DA228F92A431FC60011E43E /* Search */,
 				B2B7AEE22A3B4CE500AF04F5 /* MainTabBarController */,
 				A21C51F62A42FF6400850B15 /* SavedRecipes */,
@@ -1067,6 +1093,7 @@
 				0296F7922A4342B500DBC86A /* FacebookCore */,
 				0296F7942A4342B500DBC86A /* FacebookLogin */,
 				02892EC72A58575C001A3DB4 /* Networking */,
+				02557D722A697E8E0022756A /* Domain */,
 			);
 			productName = Healthy;
 			productReference = 027DDA1B2A0E6A660052818C /* Healthy.app */;
@@ -1213,7 +1240,7 @@
 		025511B82A3C624E00295B91 /* NewRelic */ = {
 			isa = PBXShellScriptBuildPhase;
 			alwaysOutOfDate = 1;
-			buildActionMask = 2147483647;
+			buildActionMask = 12;
 			files = (
 			);
 			inputFileListPaths = (
@@ -1330,6 +1357,7 @@
 				79311FD82A19214700764707 /* UITextField+Style.swift in Sources */,
 				0255119F2A3C5D7300295B91 /* SearchViewModel.swift in Sources */,
 				B2D402DF2A3BB1D700FDB941 /* UILabel+Style.swift in Sources */,
+				02557D712A697DF90022756A /* LoginUseCase.swift in Sources */,
 				A2FA41112A44412500C9C9A0 /* UIView+Style.swift in Sources */,
 				6D2145472A44C9EB0085C519 /* SearchFilter.swift in Sources */,
 				79311FD02A191D3700764707 /* FormTextField.swift in Sources */,
@@ -1376,6 +1404,7 @@
 				6DFEC6232A2E982C0090B2E2 /* LoginViewControllerTests.swift in Sources */,
 				B85D26A72A3902DF000A463D /* EmailValidatorsTests.swift in Sources */,
 				6DFEC6252A2EA5770090B2E2 /* LoginViewModelMock.swift in Sources */,
+				02CB9B642A6ADE4E00C1E765 /* DefaultLoginUseCaseTests.swift in Sources */,
 				B29ABA5C2A3469CA00171A0C /* MainTapBarControllerTest.swift in Sources */,
 				A21C51FB2A43036A00850B15 /* UITableViewMock.swift in Sources */,
 				A21C51F92A42FF8D00850B15 /* SavedRecipesTableViewCellTests.swift in Sources */,
@@ -1766,6 +1795,10 @@
 			package = 025511B52A3C623000295B91 /* XCRemoteSwiftPackageReference "newrelic-ios-agent-spm" */;
 			productName = NewRelic;
 		};
+		02557D722A697E8E0022756A /* Domain */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = Domain;
+		};
 		02892EC72A58575C001A3DB4 /* Networking */ = {
 			isa = XCSwiftPackageProductDependency;
 			productName = Networking;

Healthy/Classes/Modules/Onboarding/Login/LoginViewController.swift

@@ -116,14 +116,20 @@ private extension LoginViewController {
         viewModel.isLoadingIndicatorPublisher
             .sink { _ in
                 // TODO: Show loading indicator.
+
             }
             .store(in: &subscriptions)
     }
 
     func bindErrorMessage() {
-        viewModel.isShowErrorMessagePublisher
-            .sink { _ in
-                // TODO: Show error message.
+        viewModel.errorPublisher
+            .sink { [weak self] error in
+                let alertController = UIAlertController(
+                    title: "Error!!",
+                    message: error.localizedDescription,
+                    preferredStyle: .alert)
+
+                self?.present(alertController, animated: true)
             }
             .store(in: &subscriptions)
     }

Healthy/Classes/Modules/Onboarding/Login/LoginViewModel.swift

@@ -1,18 +1,26 @@
 import Foundation
 import Combine
+import Domain
+import Factory
+import UIKit
 
 final class LoginViewModel {
+    @Injected(\.loginUseCase) private var loginUseCase
     private unowned let coordinator: OnboardingCoordinator
     private var subscriptions = Set<AnyCancellable>()
     @Published private var email: String = ""
     @Published private var password: String = ""
     @Published private var isLoadingState: Bool = false
-    @Published private var isShowErrorMessage: String = ""
+    @Published private var errorSubject = PassthroughSubject<Error, Never>()
     @Published private var isLoginEnabled: Bool = true
     @Published private var isLoginStatus: Bool = false
 
+    // Add a reference to the UIButton that you want to animate
+    private weak var signInButton: UIButton?
+
     init(coordinator: OnboardingCoordinator) {
         self.coordinator = coordinator
+        _ = User(email: "[email protected]", tokenID: "12345678")
     }
 }
 
@@ -29,12 +37,25 @@ extension LoginViewModel: LoginViewModelInput {
     }
 
     func performSignIn() {
-        // Sending API Request
-        // Caching User
-        // Did complete signIn
-        DispatchQueue.global().asyncAfter(deadline: .now() + 1) {
+        Task { @MainActor in
+            // show loading
             DispatchQueue.main.async {
+                self.signInButton?.startAnimating()
+            }
+            defer {
+                // dismiss loading
+                DispatchQueue.main.async {
+                    self.signInButton?.stopAnimating()
+                }
+            }
+            do {
+                _ = try await loginUseCase.login(
+                    email: email,
+                    password: password)
                 self.coordinator.didFinishSignIn()
+            } catch {
+                // handle error
+                print(error)
             }
         }
     }
@@ -51,6 +72,7 @@ extension LoginViewModel: LoginViewModelInput {
                 // End loading
             } catch {
                 // Show error
+                errorSubject.send(error)
             }
         }
     }
@@ -59,12 +81,13 @@ extension LoginViewModel: LoginViewModelInput {
 // MARK: Output
 
 extension LoginViewModel: LoginViewModelOutput {
+
     var isLoadingIndicatorPublisher: AnyPublisher<Bool, Never> {
         $isLoadingState.eraseToAnyPublisher()
     }
 
-    var isShowErrorMessagePublisher: AnyPublisher<String, Never> {
-        $isShowErrorMessage.eraseToAnyPublisher()
+    var errorPublisher: AnyPublisher<Error, Never> {
+        errorSubject.eraseToAnyPublisher()
     }
 
     var isLoginEnabledPublisher: AnyPublisher<Bool, Never> {

Healthy/Classes/Modules/Onboarding/Login/LoginViewModelType.swift

@@ -14,7 +14,7 @@ protocol LoginViewModelInput {
 
 protocol LoginViewModelOutput {
     var isLoadingIndicatorPublisher: AnyPublisher<Bool, Never> { get }
-    var isShowErrorMessagePublisher: AnyPublisher<String, Never> { get }
+    var errorPublisher: AnyPublisher<Error, Never> { get }
     var isLoginEnabledPublisher: AnyPublisher<Bool, Never> { get }
     var isLoginStatusPublisher: AnyPublisher<Bool, Never> { get }
 }

Healthy/Classes/UseCases/LoginUseCase.swift

@@ -0,0 +1,30 @@
+import Domain
+import Networking
+import Factory
+import Foundation
+
+extension Container {
+    var loginUseCase: Factory<LoginUseCase> {
+        Factory(self) {
+            DefaultLoginUseCase()
+        }
+    }
+}
+
+final class DefaultLoginUseCase: LoginUseCase {
+
+    @Injected(\.networking) private var networking
+
+    func login(email: String, password: String) async throws -> User {
+        // TODO: replace mock Request with Actual Request
+        let request = LoginRequest(email: email, password: password)
+        do {
+            _ = try await networking.dispatch(request)
+            return User(email: "[email protected]", tokenID: "12345678")
+
+        } catch {
+            // If Error
+            throw NSError(domain: "Some Error", code: -1)
+        }
+    }
+}

HealthyTests/Classes/Modules/LoginUseCase/DefaultLoginUseCaseTests.swift

@@ -0,0 +1,28 @@
+import XCTest
+@testable import Domain
+@testable import Networking
+@testable import Healthy
+
+final class DefaultLoginUseCaseTests: XCTestCase {
+    var loginUseCase: DefaultLoginUseCase!
+
+    override func setUp() {
+        super.setUp()
+        loginUseCase = DefaultLoginUseCase()
+    }
+
+    override func tearDown() {
+        loginUseCase = nil
+        super.tearDown()
+    }
+
+    func testLogin() async throws {
+        let email = "[email protected]"
+        let password = "password"
+
+        let user = try await loginUseCase.login(email: email, password: password)
+
+        XCTAssertEqual(user.email, "[email protected]")
+        XCTAssertEqual(user.tokenID, "12345678")
+    }
+}

HealthyTests/Classes/Modules/Onboarding/Login/Mocks/LoginViewModelMock.swift

@@ -2,13 +2,14 @@ import Combine
 @testable import Healthy
 
 final class LoginViewModelMock: LoginViewModelType {
+    private let errorSubject = PassthroughSubject<Error, Never>()
 
-    var isLoadingIndicatorPublisher: AnyPublisher<Bool, Never> {
-        Just(false).eraseToAnyPublisher()
+    var errorPublisher: AnyPublisher<Error, Never> {
+        errorSubject.eraseToAnyPublisher()
     }
 
-    var isShowErrorMessagePublisher: AnyPublisher<String, Never> {
-        Just("").eraseToAnyPublisher()
+    var isLoadingIndicatorPublisher: AnyPublisher<Bool, Never> {
+        Just(false).eraseToAnyPublisher()
     }
 
     var isLoginEnabledPublisher: AnyPublisher<Bool, Never> {