Decodable+Parse.swift

extension Decodable {
    static func parse(json: String) -> Self? {
        guard let url = Bundle.main.url(forResource: json, withExtension: "json"),
              let data = try? Data(contentsOf: url),
              let output = try? JSONDecoder().decode(self, from: data) else {
              return nil
        }

        return output
    }
}