mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2025-10-30 23:12:25 -05:00
5e2bf0bdca* [chore] Remove years from all license headers Years or year ranges aren't required in license headers. Many projects have removed them in recent years and it avoids a bit of yearly toil. In many cases our copyright claim was also a bit dodgy since we added the 2021-2023 header to files created after 2021 but you can't claim copyright into the past that way. * [chore] Add license header check This ensures a license header is always added to any new file. This avoids maintainers/reviewers needing to remember to check for and ask for it in case a contribution doesn't include it. * [chore] Add missing license headers * [chore] Further updates to license header * Use the more common // indentend comment format * Remove the hack we had for the linter now that we use the // format * Add SPDX license identifier
113 lines
3.2 KiB
Go
113 lines
3.2 KiB
Go
// GoToSocial
|
|
// Copyright (C) GoToSocial Authors admin@gotosocial.org
|
|
// SPDX-License-Identifier: AGPL-3.0-or-later
|
|
//
|
|
// 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 bundb
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
|
|
"github.com/superseriousbusiness/gotosocial/internal/db"
|
|
"github.com/uptrace/bun"
|
|
"github.com/uptrace/bun/dialect"
|
|
)
|
|
|
|
// DBConn wrapps a bun.DB conn to provide SQL-type specific additional functionality
|
|
type DBConn struct {
|
|
errProc func(error) db.Error // errProc is the SQL-type specific error processor
|
|
*bun.DB // DB is the underlying bun.DB connection
|
|
}
|
|
|
|
// WrapDBConn wraps a bun DB connection to provide our own error processing dependent on DB dialect.
|
|
func WrapDBConn(dbConn *bun.DB) *DBConn {
|
|
var errProc func(error) db.Error
|
|
switch dbConn.Dialect().Name() {
|
|
case dialect.PG:
|
|
errProc = processPostgresError
|
|
case dialect.SQLite:
|
|
errProc = processSQLiteError
|
|
default:
|
|
panic("unknown dialect name: " + dbConn.Dialect().Name().String())
|
|
}
|
|
return &DBConn{
|
|
errProc: errProc,
|
|
DB: dbConn,
|
|
}
|
|
}
|
|
|
|
// RunInTx wraps execution of the supplied transaction function.
|
|
func (conn *DBConn) RunInTx(ctx context.Context, fn func(bun.Tx) error) db.Error {
|
|
return conn.ProcessError(func() error {
|
|
// Acquire a new transaction
|
|
tx, err := conn.BeginTx(ctx, nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var done bool
|
|
|
|
defer func() {
|
|
if !done {
|
|
_ = tx.Rollback()
|
|
}
|
|
}()
|
|
|
|
// Perform supplied transaction
|
|
if err := fn(tx); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Finally, commit
|
|
err = tx.Commit() //nolint:contextcheck
|
|
done = true
|
|
return err
|
|
}())
|
|
}
|
|
|
|
// ProcessError processes an error to replace any known values with our own db.Error types,
|
|
// making it easier to catch specific situations (e.g. no rows, already exists, etc)
|
|
func (conn *DBConn) ProcessError(err error) db.Error {
|
|
switch {
|
|
case err == nil:
|
|
return nil
|
|
case err == sql.ErrNoRows:
|
|
return db.ErrNoEntries
|
|
default:
|
|
return conn.errProc(err)
|
|
}
|
|
}
|
|
|
|
// Exists checks the results of a SelectQuery for the existence of the data in question, masking ErrNoEntries errors
|
|
func (conn *DBConn) Exists(ctx context.Context, query *bun.SelectQuery) (bool, db.Error) {
|
|
exists, err := query.Exists(ctx)
|
|
|
|
// Process error as our own and check if it exists
|
|
switch err := conn.ProcessError(err); err {
|
|
case nil:
|
|
return exists, nil
|
|
case db.ErrNoEntries:
|
|
return false, nil
|
|
default:
|
|
return false, err
|
|
}
|
|
}
|
|
|
|
// NotExists is the functional opposite of conn.Exists()
|
|
func (conn *DBConn) NotExists(ctx context.Context, query *bun.SelectQuery) (bool, db.Error) {
|
|
exists, err := conn.Exists(ctx, query)
|
|
return !exists, err
|
|
}
|