Refactor user email confirmation + password reset handling (#919)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/api/pulls/919
Co-authored-by: konrad <konrad@kola-entertainments.de>
Co-committed-by: konrad <konrad@kola-entertainments.de>

pkg/migration/20210713213622.go

@@ -0,0 +1,71 @@
+// Vikunja is a to-do list application to facilitate your life.
+// Copyright 2018-2021 Vikunja and contributors. All rights reserved.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public Licensee 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 Licensee for more details.
+//
+// You should have received a copy of the GNU Affero General Public Licensee
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package migration
+
+import (
+	"src.techknowlogick.com/xormigrate"
+	"xorm.io/xorm"
+)
+
+type users20210713213622 struct {
+	ID       int64 `xorm:"bigint autoincr not null unique pk" json:"id"`
+	IsActive bool  `xorm:"null" json:"-"`
+	Status   int   `xorm:"default 0" json:"-"`
+}
+
+func (users20210713213622) TableName() string {
+	return "users"
+}
+
+func init() {
+	migrations = append(migrations, &xormigrate.Migration{
+		ID:          "20210713213622",
+		Description: "Add users status instead of is_active",
+		Migrate: func(tx *xorm.Engine) error {
+			err := tx.Sync2(users20210713213622{})
+			if err != nil {
+				return err
+			}
+
+			users := []*users20210713213622{}
+			err = tx.Find(&users)
+			if err != nil {
+				return err
+			}
+
+			for _, user := range users {
+				if user.IsActive {
+					continue
+				}
+
+				user.Status = 1 // 1 is "email confirmation required" - as that's the only way is_active was used before we'll use that
+				_, err := tx.
+					Where("id = ?", user.ID).
+					Cols("status").
+					Update(user)
+				if err != nil {
+					return err
+				}
+			}
+
+			return dropTableColum(tx, "users", "is_active")
+		},
+		Rollback: func(tx *xorm.Engine) error {
+			return nil
+		},
+	})
+}