package middleware

import (
	"net/http"
	"time"

	"git.staur.ca/stobbsm/clustvirt/lib/log"
)

// NoCache adds headers indicating the browser shouldn't cache
// any of the responses. Useful for debugging, should not be used
// on production
func NoCache(next http.Handler) http.Handler {
	log.Info("router.middleware").Str("middleware", "NoCache").Msg("middleware loaded")
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Add("Cache-Control", "no-cache, no-store, no-transform, must-revalidate, private, max-age=0")
		w.Header().Add("Expires", time.Unix(0, 0).UTC().Format(http.TimeFormat))
		w.Header().Add("Pragma", "no-cache")

		next.ServeHTTP(w, r)
	})
}