validate new account requests

internal/module/account/validation.go

@@ -0,0 +1,57 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"errors"
+
+	"github.com/gotosocial/gotosocial/internal/db"
+	"github.com/gotosocial/gotosocial/internal/util"
+	"github.com/gotosocial/gotosocial/pkg/mastotypes"
+)
+
+func validateCreateAccount(form *mastotypes.AccountCreateRequest, reasonRequired bool, db db.DB) error {
+	if err := util.ValidateSignUpUsername(form.Username); err != nil {
+		return err
+	}
+
+	if err := util.ValidateEmail(form.Email); err != nil {
+		return err
+	}
+
+	if err := util.ValidateSignUpPassword(form.Password); err != nil {
+		return err
+	}
+
+	if !form.Agreement {
+		return errors.New("agreement to terms and conditions not given")
+	}
+
+	if err := util.ValidateLanguage(form.Locale); err != nil {
+		return err
+	}
+
+	if err := util.ValidateSignUpReason(form.Reason, reasonRequired); err != nil {
+		return err
+	}
+
+	//TODO: validate new email address and new username
+
+	return nil
+}