GoToSocial/internal/processing/timeline/common.go

72 lines
2.1 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 timeline
import (
"context"
"github.com/superseriousbusiness/gotosocial/internal/timeline"
)
// SkipInsert returns a function that satisifes SkipInsertFunction.
func SkipInsert() timeline.SkipInsertFunction {
// Gap to allow between a status or boost of status,
// and reinsertion of a new boost of that status.
// This is useful to avoid a heavily boosted status
// showing up way too often in a user's timeline.
const boostReinsertionDepth = 50
return func(
ctx context.Context,
newItemID string,
newItemAccountID string,
newItemBoostOfID string,
newItemBoostOfAccountID string,
nextItemID string,
nextItemAccountID string,
nextItemBoostOfID string,
nextItemBoostOfAccountID string,
depth int,
) (bool, error) {
if newItemID == nextItemID {
// Don't insert duplicates.
return true, nil
}
if newItemBoostOfID != "" {
if newItemBoostOfID == nextItemBoostOfID &&
depth < boostReinsertionDepth {
// Don't insert boosts of items
// we've seen boosted recently.
return true, nil
}
if newItemBoostOfID == nextItemID &&
depth < boostReinsertionDepth {
// Don't insert boosts of items when
// we've seen the original recently.
return true, nil
}
}
// Proceed with insertion
// (that's what she said!).
return false, nil
}
}