package main

import "net/http"

type conditionalMiddlewareFunc func(r *http.Request) bool

// conditionalMiddleware simply uses handler a if condition is true and handler
// b if condition is false.
func conditionalMiddleware(condition conditionalMiddlewareFunc,
	a, b http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if condition(r) {
			a.ServeHTTP(w, r)
		} else {
			b.ServeHTTP(w, r)
		}
	})
}