[SwiftUI] iOS13 Carousel View

struct CarouselView<Content: View>: View {
    private var numberOfItems: Int
    private var content: Content
    
    @State private var currentIndex: Int = 0
    
    init(numberOfItems: Int, @ViewBuilder content: () -> Content) {
        self.numberOfItems = numberOfItems
        self.content = content()
    }
    
    var body: some View {
        GeometryReader { geometry in
            HStack(spacing: 0) {
                self.content
                    .frame(width: geometry.size.width, height: geometry.size.height, alignment: .leading)
            }
            .frame(width: geometry.size.width, height: geometry.size.height, alignment: .leading)
            .offset(x: -CGFloat(self.currentIndex) * geometry.size.width, y: 0)
            .animation(.spring())
            .gesture(
                DragGesture()
                    .onEnded({ value in
                        if value.translation.width < 0 {
                            if self.currentIndex < self.numberOfItems - 1 {
                                self.currentIndex += 1
                            }
                        }
                        if value.translation.width > 0 {
                            if self.currentIndex > 0 {
                                self.currentIndex -= 1
                            }
                        }
                    })
            )
        }
    }
}