[생성 패턴] Abstract Factory Pattern

Abstract Factory 패턴은 매트릭스 관계를 가진 클래스 오브젝트를 생성할 때 유용하다.

핵심은 각각의 테마를 가진 오브젝트를 하나의 팩토리에서 만든다는 것이다.

// Protocols for components
protocol Button {
    func click()
}

protocol CheckBox {
    func check()
}

protocol ScrollBar {
    func scroll()
}

// Dark theme implementations
class DarkButton: Button {
    func click() {
        print("dark click")
    }
}

class DarkCheckBox: CheckBox {
    func check() {
        print("dark check")
    }
}

class DarkScrollBar: ScrollBar {
    func scroll() {
        print("dark scroll")
    }
}

// Light theme implementations
class LightButton: Button {
    func click() {
        print("light click")
    }
}

class LightCheckBox: CheckBox {
    func check() {
        print("light check")
    }
}

class LightScrollBar: ScrollBar {
    func scroll() {
        print("light scroll")
    }
}

// UIFactory protocol and its implementations
protocol UIFactory {
    func getButton() -> Button
    func getCheckBox() -> CheckBox
    func getScrollBar() -> ScrollBar
}

class DarkUIFactory: UIFactory {
    func getButton() -> Button {
        return DarkButton()
    }

    func getCheckBox() -> CheckBox {
        return DarkCheckBox()
    }

    func getScrollBar() -> ScrollBar {
        return DarkScrollBar()
    }
}

class LightUIFactory: UIFactory {
    func getButton() -> Button {
        return LightButton()
    }

    func getCheckBox() -> CheckBox {
        return LightCheckBox()
    }

    func getScrollBar() -> ScrollBar {
        return LightScrollBar()
    }
}

// Using the factories
let darkFactory = DarkUIFactory()
let darkButton = darkFactory.getButton()
let darkCheckBox = darkFactory.getCheckBox()
let darkScrollBar = darkFactory.getScrollBar()

darkButton.click()
darkCheckBox.check()
darkScrollBar.scroll()

/*
dark click
dark check
dark scroll
*/

let lightFactory = LightUIFactory()
let lightButton = lightFactory.getButton()
let lightCheckBox = lightFactory.getCheckBox()
let lightScrollBar = lightFactory.getScrollBar()

lightButton.click()
lightCheckBox.check()
lightScrollBar.scroll()

/*
light click
light check
light scroll
*/