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// 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 migrations
import (
"context"
"database/sql"
"time"
previousgtsmodel "github.com/superseriousbusiness/gotosocial/internal/db/bundb/migrations/20211113114307_init"
newgtsmodel "github.com/superseriousbusiness/gotosocial/internal/db/bundb/migrations/20220214175650_media_cleanup"
"github.com/uptrace/bun"
)
func init() {
const batchSize = 100
up := func(ctx context.Context, db *bun.DB) error {
// we need to migrate media attachments into a new table
// see section 6 here: https://www.sqlite.org/lang_altertable.html
return db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
// create the new media attachments table
if _, err := tx.
NewCreateTable().
ModelTableExpr("new_media_attachments").
Model(&newgtsmodel.MediaAttachment{}).
IfNotExists().
Exec(ctx); err != nil {
return err
}
offset := time.Now()
// migrate existing media attachments into new table
migrateLoop:
for {
oldAttachments := []*previousgtsmodel.MediaAttachment{}
err := tx.
NewSelect().
Model(&oldAttachments).
// subtract a millisecond from the offset just to make sure we're not getting double entries (this happens sometimes)
Where("media_attachment.created_at < ?", offset.Add(-1*time.Millisecond)).
Order("media_attachment.created_at DESC").
Limit(batchSize).
Scan(ctx)
if err != nil && err != sql.ErrNoRows {
// there's been a real error
return err
}
if err == sql.ErrNoRows || len(oldAttachments) == 0 {
// we're finished migrating
break migrateLoop
}
// update the offset to the createdAt time of the oldest media attachment in the slice
offset = oldAttachments[len(oldAttachments)-1].CreatedAt
// for every old attachment, we need to make a new attachment out of it by taking the same values
newAttachments := []*newgtsmodel.MediaAttachment{}
for _, old := range oldAttachments {
new := &newgtsmodel.MediaAttachment{
ID: old.ID,
CreatedAt: old.CreatedAt,
UpdatedAt: old.UpdatedAt,
StatusID: old.StatusID,
URL: old.URL,
RemoteURL: old.RemoteURL,
Type: newgtsmodel.FileType(old.Type),
FileMeta: newgtsmodel.FileMeta{
Original: newgtsmodel.Original{
Width: old.FileMeta.Original.Width,
Height: old.FileMeta.Original.Height,
Size: old.FileMeta.Original.Size,
Aspect: old.FileMeta.Original.Aspect,
},
Small: newgtsmodel.Small{
Width: old.FileMeta.Small.Width,
Height: old.FileMeta.Small.Height,
Size: old.FileMeta.Small.Size,
Aspect: old.FileMeta.Small.Aspect,
},
Focus: newgtsmodel.Focus{
X: old.FileMeta.Focus.X,
Y: old.FileMeta.Focus.Y,
},
},
AccountID: old.AccountID,
Description: old.Description,
ScheduledStatusID: old.ScheduledStatusID,
Blurhash: old.Blurhash,
Processing: newgtsmodel.ProcessingStatus(old.Processing),
File: newgtsmodel.File{
Path: old.File.Path,
ContentType: old.File.ContentType,
FileSize: old.File.FileSize,
UpdatedAt: old.File.UpdatedAt,
},
Thumbnail: newgtsmodel.Thumbnail{
Path: old.Thumbnail.Path,
ContentType: old.Thumbnail.ContentType,
FileSize: old.Thumbnail.FileSize,
UpdatedAt: old.Thumbnail.UpdatedAt,
URL: old.Thumbnail.URL,
RemoteURL: old.Thumbnail.RemoteURL,
},
Avatar: old.Avatar,
Header: old.Header,
Cached: true,
}
newAttachments = append(newAttachments, new)
}
// insert this batch of new attachments, and then continue the loop
if _, err := tx.
NewInsert().
Model(&newAttachments).
ModelTableExpr("new_media_attachments").
Exec(ctx); err != nil {
return err
}
}
// we have all the data we need from the old table, so we can safely drop it now
if _, err := tx.NewDropTable().Model(&previousgtsmodel.MediaAttachment{}).Exec(ctx); err != nil {
return err
}
// rename the new table to the same name as the old table was
if _, err := tx.ExecContext(ctx, "ALTER TABLE new_media_attachments RENAME TO media_attachments;"); err != nil {
return err
}
// add an index to the new table
if _, err := tx.
NewCreateIndex().
Model(&newgtsmodel.MediaAttachment{}).
Index("media_attachments_id_idx").
Column("id").
Exec(ctx); err != nil {
return err
}
return nil
})
}
down := func(ctx context.Context, db *bun.DB) error {
return db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
return nil
})
}
if err := Migrations.Register(up, down); err != nil {
panic(err)
}
}
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