TYRONEMICHAEL

enum Mode {

    case small
    case medium

    struct Dimensions {
        let colorDepth: Int
        let width: Int
        let height: Int
    }

TYRONEMICHAEL

let authenticator = Authenticator()
authenticator.authenticateSuccessfully()
//authenticator.authenticateUnsuccessfully()

TYRONEMICHAEL

LoginContainer.instance.register(plugin: PostLoginSuccessPlugin.self, with: UserProfilePostLoginPluginImplementation())
LoginContainer.instance.register(plugin: PostLoginSuccessPlugin.self, with: UserFeedPostLoginPluginImplementation())
LoginContainer.instance.register(plugin: PostLoginSuccessPlugin.self, with: LocalStoragePostLoginPluginImplementation())
LoginContainer.instance.register(plugin: PostLoginFailurePlugin.self, with: LocalStoragePostLoginPluginImplementation())

TYRONEMICHAEL

final class UserProfilePostLoginPluginImplementation: PostLoginSuccessPlugin {

    func successfulLogin(userId: String) {
        print("Fetching user profile with id \(userId)...")
    }

}

final class UserFeedPostLoginPluginImplementation: PostLoginSuccessPlugin {

TYRONEMICHAEL

public final class Authenticator {
    
    public init() {}
    
    public func authenticateSuccessfully() {
        print("Logging in...")
        print("Logged in successfully...")
        LoginContainer.instance.resolve(forPlugin: PostLoginSuccessPlugin.self).forEach(successfulLogin)
    }
    

TYRONEMICHAEL

public final class LoginContainer {

    private var registry = [String: [() -> Any]]()
    private init() {}
    
}

public extension LoginContainer {
    
    static let instance = LoginContainer()

TYRONEMICHAEL

public enum FailedLogin: Error {
    
    case userNotFound
    
}

public protocol PostLoginFailurePlugin {
    
    func failedLogin(error: FailedLogin)
    

TYRONEMICHAEL

public typealias UserId = String

public protocol PostLoginSuccessPlugin {
    
    func successfulLogin(userId: UserId)
    
}

TYRONEMICHAEL

public final class Authenticator {
    
    public init() {}
    
    public func authenticateSuccessfully() {
        print("Logging in...")
        print("Logged in successfully...")
    }
    
    public func authenticateUnsuccessfully() {

TYRONEMICHAEL

func getCurrentUser() -> Promise<User> {
    if let existing = cache.getCurrentUser() { return existing }

    let user = Promise<User> { fulfill, reject in
        DispatchQueue.global(qos: .background).async {
            let user = self.dummyServiceCall()
            DispatchQueue.main.asyncAfter(deadline: self.delay) {
                fulfill(user)
            }
        }