AddCustomerOrderCommandHandler.swift

protocol CustomerRepositoryProtocol {
    
}

protocol ProductRepositoryProtocol {
    
}

struct ConversionRate {
    var fromCurrency : String
    var toCurrency : String
    var ratio = 0.0
}

protocol ForienExchangeProtocol {
    func conversionRates() -> [ConversionRate]
}

protocol RequestHandlerProtocol {
    associatedtype command
    func handle(request : command, canCancel : Bool)
}

class AddCustomerOrderCommandHandler : RequestHandlerProtocol {
    typealias command = AddCustomerOrderCommand
    
    private (set) var customerRepository : CustomerRepositoryProtocol
    private (set) var productRepositoty : ProductRepositoryProtocol
    private (set) var foreignExchange : ForienExchangeProtocol
    
    init(customerRepository : CustomerRepositoryProtocol,
         productRepositoty : ProductRepositoryProtocol,
         foreignExchange : ForienExchangeProtocol) {
        self.customerRepository = customerRepository
        self.productRepositoty = productRepositoty
        self.foreignExchange = foreignExchange
    }
    
    func handle(request: AddCustomerOrderCommand, canCancel: Bool) {
        //
    }
}