Codable1.swift

struct Photo: Codable
{
    //String, URL, Bool and Date conform to Codable.
    var title: String
    var url: URL
    var isSample: Bool
    
    //The Dictionary is of type [String:String] and String already conforms to Codable.
    var metaData: [String:String]
    
    //PhotoType and Size are also Codable types
    var type: PhotoType
    var size: Size
}

struct Size: Codable
{
    var height: Double
    var width: Double
}

enum PhotoType: String, Codable
{
    case flower
    case animal
    case fruit
    case vegetable
}