ImageDescriptors.swift

extension ImageDescriptor where ImageReference == UIImage {
    static let logo = ImageDescriptor<UIImage>(
        imageReference: UIImage(named: "logo")!.withRenderingMode(.alwaysTemplate),
        properties: UIImageView.Properties(
            contentMode: .center,
            backgroundColor: .white,
            tintColor: .lightGray,
            accessibilityIdentifier: "logoImage"
        )
    )

    static let loading = ImageDescriptor<UIImage>(
        imageReference: UIImage.animatedLoadingImage,
        properties: UIImageView.Properties(
            contentMode: .center,
            backgroundColor: UIColor(white: 0.93, alpha: 1),
            tintColor: .lightGray,
            accessibilityIdentifier: "loadingImage"
        )
    )

    static let failure = ImageDescriptor<UIImage>(
        imageReference: UIImage(named: "loading_failure")!,
        properties: UIImageView.Properties(
            contentMode: .center,
            backgroundColor: .red,
            tintColor: .white,
            accessibilityIdentifier: "failureImage"
        )
    )
}

extension ImageDescriptor where ImageReference == URL {
    static func productImage(with productImageURL: URL) -> ImageDescriptor<URL> {
        return ImageDescriptor<URL>(
            imageReference: productImageURL,
            properties: UIImageView.Properties(
                contentMode: .scaleAspectFill,
                backgroundColor: .white,
                tintColor: .black,
                accessibilityIdentifier: "productImage"
            )
        )
    }
}

extension UIImage {
    static let animatedLoadingImage: UIImage = {
        let loadingImages = (0 ..< 10).map({ UIImage(named: "loading\($0).gif")! })
        let animatedLoadingImage = UIImage.animatedImage(with: loadingImages, duration: 0.5)!
        return animatedLoadingImage
    }()
}