Basic usage of Router for Network calls

NetworkHandler.swift

// Swift 3 
// Alamofire 4

enum Router: URLRequestConvertible {
    case updateUser(userId: Int, body:[String:Any])
 
    var method: HTTPMethod {
        switch self {
        case . updateUser(_,_):
            return .put
        }
    }
 
    var path: String {
        switch self {
            case . updateUser(let userId,_):
            return "/users/\(userId)"
        }
    }
 
    var parameters: [String: Any]? {
        switch self {
        case . updateUser(_, let body):
            return body
        }
    }
 
    var encoding:ParameterEncoding {
        switch self {
        case . updateUser(_,_):
            // This will set HTTP multipart request
            return URLEncoding(destination: .httpBody)
        }
    }
 
    func asURLRequest() throws -> URLRequest {
        // Do more here...
        return try self.encoding.encode(request, with: self.parameters)
    }
}
 
 
///
// # How to use it.
let params: [String: Any]?
 
let manager = SessionManager(configuration: URLSessionConfiguration.default)

manager.request(Router.updateUser(userId: 1, body: params))
.responseJSON()