gotosocial/internal/db/bundb/list.go

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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 bundb
import (
"context"
"errors"
"fmt"
"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/log"
"github.com/superseriousbusiness/gotosocial/internal/state"
"github.com/uptrace/bun"
)
type listDB struct {
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db *WrappedDB
state *state.State
}
/*
LIST FUNCTIONS
*/
func (l *listDB) GetListByID(ctx context.Context, id string) (*gtsmodel.List, error) {
return l.getList(
ctx,
"ID",
func(list *gtsmodel.List) error {
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return l.db.NewSelect().
Model(list).
Where("? = ?", bun.Ident("list.id"), id).
Scan(ctx)
},
id,
)
}
func (l *listDB) getList(ctx context.Context, lookup string, dbQuery func(*gtsmodel.List) error, keyParts ...any) (*gtsmodel.List, error) {
list, err := l.state.Caches.GTS.List().Load(lookup, func() (*gtsmodel.List, error) {
var list gtsmodel.List
// Not cached! Perform database query.
if err := dbQuery(&list); err != nil {
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return nil, l.db.ProcessError(err)
}
return &list, nil
}, keyParts...)
if err != nil {
// already processed
return nil, err
}
if gtscontext.Barebones(ctx) {
// Only a barebones model was requested.
return list, nil
}
if err := l.state.DB.PopulateList(ctx, list); err != nil {
return nil, err
}
return list, nil
}
func (l *listDB) GetListsForAccountID(ctx context.Context, accountID string) ([]*gtsmodel.List, error) {
// Fetch IDs of all lists owned by this account.
var listIDs []string
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if err := l.db.
NewSelect().
TableExpr("? AS ?", bun.Ident("lists"), bun.Ident("list")).
Column("list.id").
Where("? = ?", bun.Ident("list.account_id"), accountID).
Order("list.id DESC").
Scan(ctx, &listIDs); err != nil {
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return nil, l.db.ProcessError(err)
}
if len(listIDs) == 0 {
return nil, nil
}
// Select each list using its ID to ensure cache used.
lists := make([]*gtsmodel.List, 0, len(listIDs))
for _, id := range listIDs {
list, err := l.state.DB.GetListByID(ctx, id)
if err != nil {
log.Errorf(ctx, "error fetching list %q: %v", id, err)
continue
}
lists = append(lists, list)
}
return lists, nil
}
func (l *listDB) PopulateList(ctx context.Context, list *gtsmodel.List) error {
var (
err error
errs = gtserror.NewMultiError(2)
)
if list.Account == nil {
// List account is not set, fetch from the database.
list.Account, err = l.state.DB.GetAccountByID(
gtscontext.SetBarebones(ctx),
list.AccountID,
)
if err != nil {
errs.Appendf("error populating list account: %w", err)
}
}
if list.ListEntries == nil {
// List entries are not set, fetch from the database.
list.ListEntries, err = l.state.DB.GetListEntries(
gtscontext.SetBarebones(ctx),
list.ID,
"", "", "", 0,
)
if err != nil {
errs.Appendf("error populating list entries: %w", err)
}
}
if err := errs.Combine(); err != nil {
return gtserror.Newf("%w", err)
}
return nil
}
func (l *listDB) PutList(ctx context.Context, list *gtsmodel.List) error {
return l.state.Caches.GTS.List().Store(list, func() error {
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_, err := l.db.NewInsert().Model(list).Exec(ctx)
return l.db.ProcessError(err)
})
}
func (l *listDB) UpdateList(ctx context.Context, list *gtsmodel.List, columns ...string) error {
list.UpdatedAt = time.Now()
if len(columns) > 0 {
// If we're updating by column, ensure "updated_at" is included.
columns = append(columns, "updated_at")
}
defer func() {
// Invalidate all entries for this list ID.
l.state.Caches.GTS.ListEntry().Invalidate("ListID", list.ID)
// Invalidate this entire list's timeline.
if err := l.state.Timelines.List.RemoveTimeline(ctx, list.ID); err != nil {
log.Errorf(ctx, "error invalidating list timeline: %q", err)
}
}()
return l.state.Caches.GTS.List().Store(list, func() error {
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_, err := l.db.NewUpdate().
Model(list).
Where("? = ?", bun.Ident("list.id"), list.ID).
Column(columns...).
Exec(ctx)
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return l.db.ProcessError(err)
})
}
func (l *listDB) DeleteListByID(ctx context.Context, id string) error {
// Load list by ID into cache to ensure we can perform
// all necessary cache invalidation hooks on removal.
_, err := l.GetListByID(
// Don't populate the entry;
// we only want the list ID.
gtscontext.SetBarebones(ctx),
id,
)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
// NOTE: even if db.ErrNoEntries is returned, we
// still run the below transaction to ensure related
// objects are appropriately deleted.
return err
}
defer func() {
// Invalidate this list from cache.
l.state.Caches.GTS.List().Invalidate("ID", id)
// Invalidate this entire list's timeline.
if err := l.state.Timelines.List.RemoveTimeline(ctx, id); err != nil {
log.Errorf(ctx, "error invalidating list timeline: %q", err)
}
}()
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return l.db.RunInTx(ctx, func(tx bun.Tx) error {
// Delete all entries attached to list.
if _, err := tx.NewDelete().
Table("list_entries").
Where("? = ?", bun.Ident("list_id"), id).
Exec(ctx); err != nil {
return err
}
// Delete the list itself.
_, err := tx.NewDelete().
Table("lists").
Where("? = ?", bun.Ident("id"), id).
Exec(ctx)
return err
})
}
/*
LIST ENTRY functions
*/
func (l *listDB) GetListEntryByID(ctx context.Context, id string) (*gtsmodel.ListEntry, error) {
return l.getListEntry(
ctx,
"ID",
func(listEntry *gtsmodel.ListEntry) error {
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return l.db.NewSelect().
Model(listEntry).
Where("? = ?", bun.Ident("list_entry.id"), id).
Scan(ctx)
},
id,
)
}
func (l *listDB) getListEntry(ctx context.Context, lookup string, dbQuery func(*gtsmodel.ListEntry) error, keyParts ...any) (*gtsmodel.ListEntry, error) {
listEntry, err := l.state.Caches.GTS.ListEntry().Load(lookup, func() (*gtsmodel.ListEntry, error) {
var listEntry gtsmodel.ListEntry
// Not cached! Perform database query.
if err := dbQuery(&listEntry); err != nil {
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return nil, l.db.ProcessError(err)
}
return &listEntry, nil
}, keyParts...)
if err != nil {
return nil, err // already processed
}
if gtscontext.Barebones(ctx) {
// Only a barebones model was requested.
return listEntry, nil
}
// Further populate the list entry fields where applicable.
if err := l.state.DB.PopulateListEntry(ctx, listEntry); err != nil {
return nil, err
}
return listEntry, nil
}
func (l *listDB) GetListEntries(ctx context.Context,
listID string,
maxID string,
sinceID string,
minID string,
limit int,
) ([]*gtsmodel.ListEntry, error) {
// Ensure reasonable
if limit < 0 {
limit = 0
}
// Make educated guess for slice size
var (
entryIDs = make([]string, 0, limit)
frontToBack = true
)
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q := l.db.
NewSelect().
TableExpr("? AS ?", bun.Ident("list_entries"), bun.Ident("entry")).
// Select only IDs from table
Column("entry.id").
// Select only entries belonging to listID.
Where("? = ?", bun.Ident("entry.list_id"), listID)
if maxID != "" {
// return only entries LOWER (ie., older) than maxID
q = q.Where("? < ?", bun.Ident("entry.id"), maxID)
}
if sinceID != "" {
// return only entries HIGHER (ie., newer) than sinceID
q = q.Where("? > ?", bun.Ident("entry.id"), sinceID)
}
if minID != "" {
// return only entries HIGHER (ie., newer) than minID
q = q.Where("? > ?", bun.Ident("entry.id"), minID)
// page up
frontToBack = false
}
if limit > 0 {
// limit amount of entries returned
q = q.Limit(limit)
}
if frontToBack {
// Page down.
q = q.Order("entry.id DESC")
} else {
// Page up.
q = q.Order("entry.id ASC")
}
if err := q.Scan(ctx, &entryIDs); err != nil {
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return nil, l.db.ProcessError(err)
}
if len(entryIDs) == 0 {
return nil, nil
}
// If we're paging up, we still want entries
// to be sorted by ID desc, so reverse ids slice.
// https://zchee.github.io/golang-wiki/SliceTricks/#reversing
if !frontToBack {
for l, r := 0, len(entryIDs)-1; l < r; l, r = l+1, r-1 {
entryIDs[l], entryIDs[r] = entryIDs[r], entryIDs[l]
}
}
// Select each list entry using its ID to ensure cache used.
listEntries := make([]*gtsmodel.ListEntry, 0, len(entryIDs))
for _, id := range entryIDs {
listEntry, err := l.state.DB.GetListEntryByID(ctx, id)
if err != nil {
log.Errorf(ctx, "error fetching list entry %q: %v", id, err)
continue
}
listEntries = append(listEntries, listEntry)
}
return listEntries, nil
}
func (l *listDB) GetListEntriesForFollowID(ctx context.Context, followID string) ([]*gtsmodel.ListEntry, error) {
var entryIDs []string
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if err := l.db.
NewSelect().
TableExpr("? AS ?", bun.Ident("list_entries"), bun.Ident("entry")).
// Select only IDs from table
Column("entry.id").
// Select only entries belonging with given followID.
Where("? = ?", bun.Ident("entry.follow_id"), followID).
Scan(ctx, &entryIDs); err != nil {
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return nil, l.db.ProcessError(err)
}
if len(entryIDs) == 0 {
return nil, nil
}
// Select each list entry using its ID to ensure cache used.
listEntries := make([]*gtsmodel.ListEntry, 0, len(entryIDs))
for _, id := range entryIDs {
listEntry, err := l.state.DB.GetListEntryByID(ctx, id)
if err != nil {
log.Errorf(ctx, "error fetching list entry %q: %v", id, err)
continue
}
listEntries = append(listEntries, listEntry)
}
return listEntries, nil
}
func (l *listDB) PopulateListEntry(ctx context.Context, listEntry *gtsmodel.ListEntry) error {
var err error
if listEntry.Follow == nil {
// ListEntry follow is not set, fetch from the database.
listEntry.Follow, err = l.state.DB.GetFollowByID(
gtscontext.SetBarebones(ctx),
listEntry.FollowID,
)
if err != nil {
return fmt.Errorf("error populating listEntry follow: %w", err)
}
}
return nil
}
func (l *listDB) PutListEntries(ctx context.Context, entries []*gtsmodel.ListEntry) error {
defer func() {
// Collect unique list IDs from the entries.
listIDs := collate(func(i int) string {
return entries[i].ListID
}, len(entries))
for _, id := range listIDs {
// Invalidate the timeline for the list this entry belongs to.
if err := l.state.Timelines.List.RemoveTimeline(ctx, id); err != nil {
log.Errorf(ctx, "error invalidating list timeline: %q", err)
}
}
}()
// Finally, insert each list entry into the database.
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return l.db.RunInTx(ctx, func(tx bun.Tx) error {
for _, entry := range entries {
if err := l.state.Caches.GTS.ListEntry().Store(entry, func() error {
_, err := tx.
NewInsert().
Model(entry).
Exec(ctx)
return err
}); err != nil {
return err
}
}
return nil
})
}
func (l *listDB) DeleteListEntry(ctx context.Context, id string) error {
// Load list entry into cache to ensure we can perform
// all necessary cache invalidation hooks on removal.
entry, err := l.GetListEntryByID(
// Don't populate the entry;
// we only want the list ID.
gtscontext.SetBarebones(ctx),
id,
)
if err != nil {
if errors.Is(err, db.ErrNoEntries) {
// Already gone.
return nil
}
return err
}
defer func() {
// Invalidate this list entry upon delete.
l.state.Caches.GTS.ListEntry().Invalidate("ID", id)
// Invalidate the timeline for the list this entry belongs to.
if err := l.state.Timelines.List.RemoveTimeline(ctx, entry.ListID); err != nil {
log.Errorf(ctx, "error invalidating list timeline: %q", err)
}
}()
// Finally delete the list entry.
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_, err = l.db.NewDelete().
Table("list_entries").
Where("? = ?", bun.Ident("id"), id).
Exec(ctx)
return err
}
func (l *listDB) DeleteListEntriesForFollowID(ctx context.Context, followID string) error {
var entryIDs []string
// Fetch entry IDs for follow ID.
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if err := l.db.
NewSelect().
Table("list_entries").
Column("id").
Where("? = ?", bun.Ident("follow_id"), followID).
Order("id DESC").
Scan(ctx, &entryIDs); err != nil {
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return l.db.ProcessError(err)
}
for _, id := range entryIDs {
// Delete each separately to trigger cache invalidations.
if err := l.DeleteListEntry(ctx, id); err != nil {
return err
}
}
return nil
}
// collate will collect the values of type T from an expected slice of length 'len',
// passing the expected index to each call of 'get' and deduplicating the end result.
func collate[T comparable](get func(int) T, len int) []T {
ts := make([]T, 0, len)
tm := make(map[T]struct{}, len)
for i := 0; i < len; i++ {
// Get next.
t := get(i)
if _, ok := tm[t]; !ok {
// New value, add
// to map + slice.
ts = append(ts, t)
tm[t] = struct{}{}
}
}
return ts
}