package main

import (
	"crypto/md5"
	"crypto/rand"
	"encoding/hex"
	"net/http"
)

func randomToken(length int) string {
	b := make([]byte, length)
	rand.Read(b)
	return hex.EncodeToString(b)
}

func genKey(length int) []byte {
	b := make([]byte, length)
	rand.Read(b)
	return b
}

func md5hex(s string) string {
	hash := md5.Sum([]byte(s))
	return hex.EncodeToString(hash[:])
}

func (app *App) GetCookie(r *http.Request, name string, dst interface{}) error {
	cookie, err := r.Cookie(name)
	if err != nil {
		return err
	}
	return app.CookieHandler.Decode(name, cookie.Value, dst)
}

func (app *App) SetCookie(w http.ResponseWriter, name string, v interface{}, exp int) {
	encoded, _ := app.CookieHandler.Encode(name, v)
	cookie := &http.Cookie{
		Name:     name,
		Value:    encoded,
		Path:     "/",
		HttpOnly: true,
		MaxAge:   exp,
	}
	http.SetCookie(w, cookie)
}