Service.swift

    enum Environment: String {
        case production
        case homologation
        case development
        case custom
    }

    static func preferredEnvironment() -> Environment {
        if let env = UserDefaults.standard.string(forKey: "environment") {
            return Environment(rawValue: env)!
        }
        return Environment.production
    }

    static func enviromentUrl(_ environment: Environment) -> URL? {
        if let path = Bundle.main.url(forResource: "Service", withExtension: "plist"),
            let data = try? Data(contentsOf: path) {
            if let result = try! PropertyListSerialization.propertyList(from: data, options: [], format: nil) as? [String:String] {
                return URL(string: result[environment.rawValue]!)
            }
        }
        return nil
    }