gotosocial/internal/visibility/public_timeline.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

124 lines
3.9 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 visibility
import (
"context"
"time"
"github.com/superseriousbusiness/gotosocial/internal/cache"
"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
)
// StatusHomeTimelineable checks if given status should be included on requester's public timeline. Primarily relying on status visibility to requester and the AP visibility setting, and ignoring conversation threads.
func (f *Filter) StatusPublicTimelineable(ctx context.Context, requester *gtsmodel.Account, status *gtsmodel.Status) (bool, error) {
const vtype = cache.VisibilityTypePublic
// By default we assume no auth.
requesterID := noauth
if requester != nil {
// Use provided account ID.
requesterID = requester.ID
}
visibility, err := f.state.Caches.Visibility.LoadOne("Type,RequesterID,ItemID", func() (*cache.CachedVisibility, error) {
// Visibility not yet cached, perform timeline visibility lookup.
visible, err := f.isStatusPublicTimelineable(ctx, requester, status)
if err != nil {
return nil, err
}
// Return visibility value.
return &cache.CachedVisibility{
ItemID: status.ID,
RequesterID: requesterID,
Type: vtype,
Value: visible,
}, nil
}, vtype, requesterID, status.ID)
if err != nil {
if err == cache.SentinelError {
// Filter-out our temporary
// race-condition error.
return false, nil
}
return false, err
}
return visibility.Value, nil
}
func (f *Filter) isStatusPublicTimelineable(ctx context.Context, requester *gtsmodel.Account, status *gtsmodel.Status) (bool, error) {
if status.CreatedAt.After(time.Now().Add(24 * time.Hour)) {
// Statuses made over 1 day in the future we don't show...
log.Warnf(ctx, "status >24hrs in the future: %+v", status)
return false, nil
}
// Don't show boosts on timeline.
if status.BoostOfID != "" {
return false, nil
}
// Check whether status is visible to requesting account.
visible, err := f.StatusVisible(ctx, requester, status)
if err != nil {
return false, err
}
if !visible {
log.Trace(ctx, "status not visible to timeline requester")
return false, nil
}
for parent := status; parent.InReplyToURI != ""; {
// Fetch next parent to lookup.
parentID := parent.InReplyToID
if parentID == "" {
log.Warnf(ctx, "status not yet deref'd: %s", parent.InReplyToURI)
return false, cache.SentinelError
}
// Get the next parent in the chain from DB.
parent, err = f.state.DB.GetStatusByID(
gtscontext.SetBarebones(ctx),
parentID,
)
if err != nil {
return false, gtserror.Newf("error getting status parent %s: %w", parentID, err)
}
if parent.AccountID != status.AccountID {
// This is not a single author reply-chain-thread,
// instead is an actualy conversation. Don't timeline.
log.Trace(ctx, "ignoring multi-author reply-chain")
return false, nil
}
}
// This is either a visible status in a
// single-author thread, or a visible top
// level status. Show on public timeline.
return true, nil
}