Router.swift

public protocol RouteType: ResponderType {
    var methods: Set<Method> { get }
    var path: String { get }
    var responder: ResponderType { get }
}

public protocol RouteMatcherType: ResponderType {
    var routes: [RouteType] { get set }
    var fallback: ResponderType { get set }
    func addRouteWithMethods(methods: Set<Method>, path: String, responder: ResponderType)
    func match(request: Request) -> ResponderType?
}

extension RouteMatcherType {
    public func respond(request: Request) throws -> Response {
        let responder = self.match(request) ?? self.fallback
        return try responder.respond(request)
    }
}

public struct Router: ResponderType {
    public let matcher: RouteMatcherType
    public let middleware: [MiddlewareType]

    public init(middleware: [MiddlewareType], matcher: RouteMatcherType) {
        self.middleware = middleware
        self.matcher = matcher
    }

    public func respond(request: Request) throws -> Response {
        return try middleware.intercept(matcher).respond(request)
    }
}