CHANGE: unified user session getter

Backend/models/user.go

@@ -14,6 +14,25 @@ type User struct {
 	Arbeitszeit    float32 `json:"arbeitszeit"`
 }
 
+func (u *User) GetUserFromSession(Session *scs.SessionManager, ctx context.Context) (User, error) {
+	var user User
+	var err error
+	if helper.GetEnv("GO_ENV", "production") == "debug" {
+		user, err = (*User).GetByPersonalNummer(nil, 123)
+	} else {
+		if !Session.Exists(ctx, "user") {
+			log.Println("No user in session storage!")
+			return user, errors.New("No user in session storage!")
+		}
+		user, err = (*User).GetByPersonalNummer(nil, Session.GetInt(ctx, "user"))
+	}
+	if err != nil {
+		log.Println("Cannot get user from session!")
+		return user, err
+	}
+	return user, nil
+}
+
 func (u *User) GetAll() ([]User, error) {
 	qStr, err := DB.Prepare((`SELECT card_uid, vorname, nachname FROM personal_daten;`))
 	var users []User