auth

var JwtAuthentication = func(next http.Handler) http.Handler {

	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

		notAuth := []string{
			"/api/admin",
			"/api/admin/login",
			"/api/admin/client/app",
			"/api/clients/login",
			"/ws",
		}

		requestPath := r.URL.Path

		for _, value := range notAuth {
			if value == requestPath {
				next.ServeHTTP(w, r)
				return
			}
		}

		tokenHeader := r.Header.Get("Authorization")

		if tokenHeader == "" {
			sendErrorResponse(w, "Missing auth token")
			return
		}

		splitted := strings.Split(tokenHeader, " ")
		if len(splitted) != 2 {
			sendErrorResponse(w, "Invalid/Malformed auth token")
			return
		}

		tokenPart := splitted[1]
		tk := &models.Token{}

		token, err := jwt.ParseWithClaims(tokenPart, tk, func(token *jwt.Token) (interface{}, error) {
			return []byte(os.Getenv("token_password")), nil
		})

		if err != nil {
			sendErrorResponse(w, "Malformed authentication token")
			return
		}

		if !token.Valid {
			sendErrorResponse(w, "Token is not valid")
			return
		}

		log.Printf("User %v", tk.UserID)
		ctx := context.WithValue(r.Context(), "user", tk.UserID)
		r = r.WithContext(ctx)
		next.ServeHTTP(w, r)
	})
}