mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-10 11:19:50 +00:00
92 lines
2.3 KiB
Go
92 lines
2.3 KiB
Go
/*
|
|
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 bundb
|
|
|
|
import (
|
|
"context"
|
|
"strings"
|
|
|
|
"database/sql"
|
|
|
|
"github.com/superseriousbusiness/gotosocial/internal/db"
|
|
"github.com/uptrace/bun"
|
|
)
|
|
|
|
// processErrorResponse parses the given error and returns an appropriate DBError.
|
|
func processErrorResponse(err error) db.Error {
|
|
switch err {
|
|
case nil:
|
|
return nil
|
|
case sql.ErrNoRows:
|
|
return db.ErrNoEntries
|
|
default:
|
|
if strings.Contains(err.Error(), "duplicate key value violates unique constraint") {
|
|
return db.ErrAlreadyExists
|
|
}
|
|
return err
|
|
}
|
|
}
|
|
|
|
func exists(ctx context.Context, q *bun.SelectQuery) (bool, db.Error) {
|
|
count, err := q.Count(ctx)
|
|
|
|
exists := count != 0
|
|
|
|
err = processErrorResponse(err)
|
|
|
|
if err != nil {
|
|
if err == db.ErrNoEntries {
|
|
return false, nil
|
|
}
|
|
return false, err
|
|
}
|
|
|
|
return exists, nil
|
|
}
|
|
|
|
func notExists(ctx context.Context, q *bun.SelectQuery) (bool, db.Error) {
|
|
count, err := q.Count(ctx)
|
|
|
|
notExists := count == 0
|
|
|
|
err = processErrorResponse(err)
|
|
|
|
if err != nil {
|
|
if err == db.ErrNoEntries {
|
|
return true, nil
|
|
}
|
|
return false, err
|
|
}
|
|
|
|
return notExists, nil
|
|
}
|
|
|
|
// whereEmptyOrNull is a convenience function to return a bun WhereGroup that specifies
|
|
// that the given column should be EITHER an empty string OR null.
|
|
//
|
|
// Use it as follows:
|
|
//
|
|
// q = q.WhereGroup(" AND ", whereEmptyOrNull("whatever_column"))
|
|
func whereEmptyOrNull(column string) func(*bun.SelectQuery) *bun.SelectQuery {
|
|
return func(q *bun.SelectQuery) *bun.SelectQuery {
|
|
return q.
|
|
WhereOr("? IS NULL", bun.Ident(column)).
|
|
WhereOr("? = ''", bun.Ident(column))
|
|
}
|
|
}
|