package mux

import "net/http"

// MiddlewareFunc is a function which receives an http.Handler and returns another http.Handler.

// Typically, the returned handler is a closure which does something with the http.ResponseWriter and http.Request passed

// to it, and then calls the handler passed as parameter to the MiddlewareFunc.

type MiddlewareFunc func(http.Handler) http.Handler

// middleware interface is anything which implements a MiddlewareFunc named Middleware.

type middleware interface {

Middleware(handler http.Handler) http.Handler

}

// MiddlewareFunc also implements the middleware interface.

func (mw MiddlewareFunc) Middleware(handler http.Handler) http.Handler {

return mw(handler)

}

// Use appends a MiddlewareFunc to the chain. Middleware can be used to intercept or otherwise modify requests and/or responses, and are executed in the order that they are applied to the Router.

func (r *Router) Use(mwf MiddlewareFunc) {

r.middlewares = append(r.middlewares, mwf)

}

// useInterface appends a middleware to the chain. Middleware can be used to intercept or otherwise modify requests and/or responses, and are executed in the order that they are applied to the Router.

func (r *Router) useInterface(mw middleware) {

r.middlewares = append(r.middlewares, mw)

}