gotosocial/internal/db/bundb/mention.go
kim 7ec1e1332e
[performance] overhaul struct (+ result) caching library for simplicity, performance and multiple-result lookups (#2535)
* rewrite cache library as codeberg.org/gruf/go-structr, implement in gotosocial

* use actual go-structr release version (not just commit hash)

* revert go toolchain changes (damn you go for auto changing this)

* fix go mod woes

* ensure %w is used in calls to errs.Appendf()

* fix error checking

* fix possible panic

* remove unnecessary start/stop functions, move to main Cache{} struct, add note regarding which caches require start/stop

* fix copy-paste artifact... 😇

* fix all comment copy-paste artifacts

* remove dropID() function, now we can just use slices.DeleteFunc()

* use util.Deduplicate() instead of collate(), move collate to util

* move orderByIDs() to util package and "generify"

* add a util.DeleteIf() function, use this to delete entries on failed population

* use slices.DeleteFunc() instead of util.DeleteIf() (i had the logic mixed up in my head somehow lol)

* add note about how collate differs from deduplicate
2024-01-19 12:57:29 +00:00

195 lines
5.3 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"
"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/log"
"github.com/superseriousbusiness/gotosocial/internal/state"
"github.com/superseriousbusiness/gotosocial/internal/util"
"github.com/uptrace/bun"
)
type mentionDB struct {
db *DB
state *state.State
}
func (m *mentionDB) GetMention(ctx context.Context, id string) (*gtsmodel.Mention, error) {
mention, err := m.state.Caches.GTS.Mention.LoadOne("ID", func() (*gtsmodel.Mention, error) {
var mention gtsmodel.Mention
q := m.db.
NewSelect().
Model(&mention).
Where("? = ?", bun.Ident("mention.id"), id)
if err := q.Scan(ctx); err != nil {
return nil, err
}
return &mention, nil
}, id)
if err != nil {
return nil, err
}
// Further populate the mention fields where applicable.
if err := m.PopulateMention(ctx, mention); err != nil {
return nil, err
}
return mention, nil
}
func (m *mentionDB) GetMentions(ctx context.Context, ids []string) ([]*gtsmodel.Mention, error) {
// Preallocate at-worst possible length.
uncached := make([]string, 0, len(ids))
// Load all mention IDs via cache loader callbacks.
mentions, err := m.state.Caches.GTS.Mention.Load("ID",
// Load cached + check for uncached.
func(load func(keyParts ...any) bool) {
for _, id := range ids {
if !load(id) {
uncached = append(uncached, id)
}
}
},
// Uncached mention loader function.
func() ([]*gtsmodel.Mention, error) {
// Preallocate expected length of uncached mentions.
mentions := make([]*gtsmodel.Mention, 0, len(uncached))
// Perform database query scanning
// the remaining (uncached) IDs.
if err := m.db.NewSelect().
Model(&mentions).
Where("? IN (?)", bun.Ident("id"), bun.In(uncached)).
Scan(ctx); err != nil {
return nil, err
}
return mentions, nil
},
)
if err != nil {
return nil, err
}
// Reorder the mentions by their
// IDs to ensure in correct order.
getID := func(m *gtsmodel.Mention) string { return m.ID }
util.OrderBy(mentions, ids, getID)
if gtscontext.Barebones(ctx) {
// no need to fully populate.
return mentions, nil
}
// Populate all loaded mentions, removing those we fail to
// populate (removes needing so many nil checks everywhere).
mentions = slices.DeleteFunc(mentions, func(mention *gtsmodel.Mention) bool {
if err := m.PopulateMention(ctx, mention); err != nil {
log.Errorf(ctx, "error populating mention %s: %v", mention.ID, err)
return true
}
return false
})
return mentions, nil
}
func (m *mentionDB) PopulateMention(ctx context.Context, mention *gtsmodel.Mention) (err error) {
var errs gtserror.MultiError
if mention.Status == nil {
// Set the mention originating status.
mention.Status, err = m.state.DB.GetStatusByID(
gtscontext.SetBarebones(ctx),
mention.StatusID,
)
if err != nil {
return gtserror.Newf("error populating mention status: %w", err)
}
}
if mention.OriginAccount == nil {
// Set the mention origin account model.
mention.OriginAccount, err = m.state.DB.GetAccountByID(
gtscontext.SetBarebones(ctx),
mention.OriginAccountID,
)
if err != nil {
return gtserror.Newf("error populating mention origin account: %w", err)
}
}
if mention.TargetAccount == nil {
// Set the mention target account model.
mention.TargetAccount, err = m.state.DB.GetAccountByID(
gtscontext.SetBarebones(ctx),
mention.TargetAccountID,
)
if err != nil {
return gtserror.Newf("error populating mention target account: %w", err)
}
}
return errs.Combine()
}
func (m *mentionDB) PutMention(ctx context.Context, mention *gtsmodel.Mention) error {
return m.state.Caches.GTS.Mention.Store(mention, func() error {
_, err := m.db.NewInsert().Model(mention).Exec(ctx)
return err
})
}
func (m *mentionDB) DeleteMentionByID(ctx context.Context, id string) error {
defer m.state.Caches.GTS.Mention.Invalidate("ID", id)
// Load mention into cache before attempting a delete,
// as we need it cached in order to trigger the invalidate
// callback. This in turn invalidates others.
_, err := m.GetMention(gtscontext.SetBarebones(ctx), id)
if err != nil {
if errors.Is(err, db.ErrNoEntries) {
// not an issue.
err = nil
}
return err
}
// Finally delete mention from DB.
_, err = m.db.NewDelete().
Table("mentions").
Where("? = ?", bun.Ident("id"), id).
Exec(ctx)
return err
}