mirror of
https://github.com/dnote/dnote
synced 2026-03-14 22:45:50 +01:00
53 lines
1.9 KiB
Go
53 lines
1.9 KiB
Go
/* Copyright 2025 Dnote Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package app
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import (
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"time"
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"github.com/dnote/dnote/pkg/server/database"
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"github.com/pkg/errors"
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"gorm.io/gorm"
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)
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// incrementUserUSN increment the given user's max_usn by 1
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// and returns the new, incremented max_usn
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func incrementUserUSN(tx *gorm.DB, userID int) (int, error) {
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// First, get the current max_usn to detect transition from empty server
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var user database.User
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if err := tx.Select("max_usn, full_sync_before").Where("id = ?", userID).First(&user).Error; err != nil {
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return 0, errors.Wrap(err, "getting current user state")
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}
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// If transitioning from empty server (MaxUSN=0) to non-empty (MaxUSN=1),
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// set full_sync_before to current timestamp to force all other clients to full sync
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if user.MaxUSN == 0 && user.FullSyncBefore == 0 {
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currentTime := time.Now().Unix()
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if err := tx.Table("users").Where("id = ?", userID).Update("full_sync_before", currentTime).Error; err != nil {
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return 0, errors.Wrap(err, "setting full_sync_before on empty server transition")
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}
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}
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if err := tx.Table("users").Where("id = ?", userID).Update("max_usn", gorm.Expr("max_usn + 1")).Error; err != nil {
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return 0, errors.Wrap(err, "incrementing user max_usn")
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}
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if err := tx.Select("max_usn").Where("id = ?", userID).First(&user).Error; err != nil {
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return 0, errors.Wrap(err, "getting the updated user max_usn")
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}
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return user.MaxUSN, nil
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}
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