Protocol For Enumeration - Swift 4

ProtocolInEnum.swift

//: Playground - noun: a place where people can play

import UIKit
import Foundation

var str = "Hello, playground"

protocol JSONRepresentable {
    var JSONRepresentation: AnyObject{ get }
}

protocol ParkingProviderProtocol: JSONRepresentable {
    
    associatedtype TypeSelf
    associatedtype RawType
    
    var value: RawType { get }
    var stopToPlaceCar: Bool { get }
    var description: String { get }
    
    static func with(intValue: RawType?) -> TypeSelf
    static var preferedOption: TypeSelf { get }
    static var all: [TypeSelf] { get }
    
}



enum ParkingProvider: ParkingProviderProtocol {
    
    typealias TypeSelf = ParkingProvider
    typealias RawType = Int
    
    case justDropOff
    case greenP
    case parkAndRide
    
    var value: RawType {
        switch self {
        case .justDropOff:
            return -1
        case .greenP:
            return 217
        case .parkAndRide:
            return 6
        }
    
    }
    var stopToPlaceCar: Bool {
        switch self {
        case .justDropOff:  return false
        case .parkAndRide:     return true
        case .greenP:   return true
        }
    }

    public var description: String {
        switch self {
        case .justDropOff: return "Get dropped off at stop"
        case .parkAndRide: return "Park at park and rides only_car"
        case .greenP: return "Park at Green P only"
        }
    }
    
    static func with(intValue: Int?) -> TypeSelf {
        
        guard let _rawValue = intValue else { return .justDropOff}
        
        switch _rawValue {
        case TypeSelf.justDropOff.value:
            return .justDropOff
        case TypeSelf.greenP.value:
            return .greenP
        case TypeSelf.parkAndRide.value:
            return .parkAndRide
        default:
            return .justDropOff
        }
        
    }
    static var preferedOption: TypeSelf {
        return .justDropOff
    }
    static var all: [TypeSelf] = [.justDropOff , .greenP, .parkAndRide]
    
    /* JSONrepresentable */
    var JSONRepresentation: AnyObject { return self.value as AnyObject }

    
}