gotosocial/internal/db/bundb/media.go
kim 63fc9b6c3e
[chore] renames the GTS caches to DB caches (#3127)
* renames the `GTS` caches to `DB` caches, as it better references what they are

* change remaining Caches.GTS uses to Caches.DB
2024-07-24 10:41:43 +02:00

297 lines
8.2 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"
"errors"
"slices"
"time"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/paging"
"github.com/superseriousbusiness/gotosocial/internal/state"
"github.com/superseriousbusiness/gotosocial/internal/util"
"github.com/uptrace/bun"
)
type mediaDB struct {
db *bun.DB
state *state.State
}
func (m *mediaDB) GetAttachmentByID(ctx context.Context, id string) (*gtsmodel.MediaAttachment, error) {
return m.getAttachment(
ctx,
"ID",
func(attachment *gtsmodel.MediaAttachment) error {
return m.db.NewSelect().
Model(attachment).
Where("? = ?", bun.Ident("media_attachment.id"), id).
Scan(ctx)
},
id,
)
}
func (m *mediaDB) GetAttachmentsByIDs(ctx context.Context, ids []string) ([]*gtsmodel.MediaAttachment, error) {
// Load all media IDs via cache loader callbacks.
media, err := m.state.Caches.DB.Media.LoadIDs("ID",
ids,
func(uncached []string) ([]*gtsmodel.MediaAttachment, error) {
// Preallocate expected length of uncached media attachments.
media := make([]*gtsmodel.MediaAttachment, 0, len(uncached))
// Perform database query scanning
// the remaining (uncached) IDs.
if err := m.db.NewSelect().
Model(&media).
Where("? IN (?)", bun.Ident("id"), bun.In(uncached)).
Scan(ctx); err != nil {
return nil, err
}
return media, nil
},
)
if err != nil {
return nil, err
}
// Reorder the media by their
// IDs to ensure in correct order.
getID := func(m *gtsmodel.MediaAttachment) string { return m.ID }
util.OrderBy(media, ids, getID)
return media, nil
}
func (m *mediaDB) getAttachment(ctx context.Context, lookup string, dbQuery func(*gtsmodel.MediaAttachment) error, keyParts ...any) (*gtsmodel.MediaAttachment, error) {
return m.state.Caches.DB.Media.LoadOne(lookup, func() (*gtsmodel.MediaAttachment, error) {
var attachment gtsmodel.MediaAttachment
// Not cached! Perform database query
if err := dbQuery(&attachment); err != nil {
return nil, err
}
return &attachment, nil
}, keyParts...)
}
func (m *mediaDB) PutAttachment(ctx context.Context, media *gtsmodel.MediaAttachment) error {
return m.state.Caches.DB.Media.Store(media, func() error {
_, err := m.db.NewInsert().Model(media).Exec(ctx)
return err
})
}
func (m *mediaDB) UpdateAttachment(ctx context.Context, media *gtsmodel.MediaAttachment, columns ...string) error {
media.UpdatedAt = time.Now()
if len(columns) > 0 {
// If we're updating by column, ensure "updated_at" is included.
columns = append(columns, "updated_at")
}
return m.state.Caches.DB.Media.Store(media, func() error {
_, err := m.db.NewUpdate().
Model(media).
Where("? = ?", bun.Ident("media_attachment.id"), media.ID).
Column(columns...).
Exec(ctx)
return err
})
}
func (m *mediaDB) DeleteAttachment(ctx context.Context, id string) error {
// Load media into cache before attempting a delete,
// as we need it cached in order to trigger the invalidate
// callback. This in turn invalidates others.
media, err := m.GetAttachmentByID(gtscontext.SetBarebones(ctx), id)
if err != nil {
if errors.Is(err, db.ErrNoEntries) {
// not an issue.
err = nil
}
return err
}
// On return, ensure that media with ID is invalidated.
defer m.state.Caches.DB.Media.Invalidate("ID", id)
// Delete media attachment in new transaction.
err = m.db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
if media.AccountID != "" {
var account gtsmodel.Account
// Get related account model.
if _, err := tx.NewSelect().
Model(&account).
Where("? = ?", bun.Ident("id"), media.AccountID).
Exec(ctx); err != nil && !errors.Is(err, db.ErrNoEntries) {
return gtserror.Newf("error selecting account: %w", err)
}
var set func(*bun.UpdateQuery) *bun.UpdateQuery
switch {
case *media.Avatar && account.AvatarMediaAttachmentID == id:
set = func(q *bun.UpdateQuery) *bun.UpdateQuery {
return q.Set("? = NULL", bun.Ident("avatar_media_attachment_id"))
}
case *media.Header && account.HeaderMediaAttachmentID == id:
set = func(q *bun.UpdateQuery) *bun.UpdateQuery {
return q.Set("? = NULL", bun.Ident("header_media_attachment_id"))
}
}
if set != nil {
// Note: this handles not found.
//
// Update the account model.
q := tx.NewUpdate().
Table("accounts").
Where("? = ?", bun.Ident("id"), account.ID)
if _, err := set(q).Exec(ctx); err != nil {
return gtserror.Newf("error updating account: %w", err)
}
}
}
if media.StatusID != "" {
var status gtsmodel.Status
// Get related status model.
if _, err := tx.NewSelect().
Model(&status).
Where("? = ?", bun.Ident("id"), media.StatusID).
Exec(ctx); err != nil && !errors.Is(err, db.ErrNoEntries) {
return gtserror.Newf("error selecting status: %w", err)
}
// Delete all instances of this deleted media ID from status attachments.
updatedIDs := slices.DeleteFunc(status.AttachmentIDs, func(s string) bool {
return s == id
})
if len(updatedIDs) != len(status.AttachmentIDs) {
// Note: this handles not found.
//
// Attachments changed, update the status.
if _, err := tx.NewUpdate().
Table("statuses").
Where("? = ?", bun.Ident("id"), status.ID).
Set("? = ?", bun.Ident("attachment_ids"), updatedIDs).
Exec(ctx); err != nil {
return gtserror.Newf("error updating status: %w", err)
}
}
}
// Finally delete this media.
if _, err := tx.NewDelete().
Table("media_attachments").
Where("? = ?", bun.Ident("id"), id).
Exec(ctx); err != nil {
return gtserror.Newf("error deleting media: %w", err)
}
return nil
})
return err
}
func (m *mediaDB) GetAttachments(ctx context.Context, page *paging.Page) ([]*gtsmodel.MediaAttachment, error) {
maxID := page.GetMax()
limit := page.GetLimit()
attachmentIDs := make([]string, 0, limit)
q := m.db.NewSelect().
Table("media_attachments").
Column("id").
Order("id DESC")
if maxID != "" {
q = q.Where("id < ?", maxID)
}
if limit != 0 {
q = q.Limit(limit)
}
if err := q.Scan(ctx, &attachmentIDs); err != nil {
return nil, err
}
return m.GetAttachmentsByIDs(ctx, attachmentIDs)
}
func (m *mediaDB) GetRemoteAttachments(ctx context.Context, page *paging.Page) ([]*gtsmodel.MediaAttachment, error) {
maxID := page.GetMax()
limit := page.GetLimit()
attachmentIDs := make([]string, 0, limit)
q := m.db.NewSelect().
Table("media_attachments").
Column("id").
Where("remote_url IS NOT NULL").
Order("id DESC")
if maxID != "" {
q = q.Where("id < ?", maxID)
}
if limit != 0 {
q = q.Limit(limit)
}
if err := q.Scan(ctx, &attachmentIDs); err != nil {
return nil, err
}
return m.GetAttachmentsByIDs(ctx, attachmentIDs)
}
func (m *mediaDB) GetCachedAttachmentsOlderThan(ctx context.Context, olderThan time.Time, limit int) ([]*gtsmodel.MediaAttachment, error) {
attachmentIDs := make([]string, 0, limit)
q := m.db.
NewSelect().
Table("media_attachments").
Column("id").
Where("cached = true").
Where("remote_url IS NOT NULL").
Where("created_at < ?", olderThan).
Order("created_at DESC")
if limit != 0 {
q = q.Limit(limit)
}
if err := q.Scan(ctx, &attachmentIDs); err != nil {
return nil, err
}
return m.GetAttachmentsByIDs(ctx, attachmentIDs)
}