87 lines
2.5 KiB
Go
87 lines
2.5 KiB
Go
/*
|
|
GoToSocial
|
|
Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
|
|
|
|
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 (
|
|
"container/list"
|
|
"context"
|
|
"errors"
|
|
)
|
|
|
|
type indexedItems struct {
|
|
data *list.List
|
|
skipInsert SkipInsertFunction
|
|
}
|
|
|
|
type indexedItemsEntry struct {
|
|
itemID string
|
|
boostOfID string
|
|
accountID string
|
|
boostOfAccountID string
|
|
}
|
|
|
|
func (i *indexedItems) insertIndexed(ctx context.Context, newEntry *indexedItemsEntry) (bool, error) {
|
|
if i.data == nil {
|
|
i.data = &list.List{}
|
|
}
|
|
|
|
// if we have no entries yet, this is both the newest and oldest entry, so just put it in the front
|
|
if i.data.Len() == 0 {
|
|
i.data.PushFront(newEntry)
|
|
return true, nil
|
|
}
|
|
|
|
var insertMark *list.Element
|
|
var position int
|
|
// We need to iterate through the index to make sure we put this item in the appropriate place according to when it was created.
|
|
// We also need to make sure we're not inserting a duplicate item -- this can happen sometimes and it's not nice UX (*shudder*).
|
|
for e := i.data.Front(); e != nil; e = e.Next() {
|
|
position++
|
|
|
|
entry, ok := e.Value.(*indexedItemsEntry)
|
|
if !ok {
|
|
return false, errors.New("insertIndexed: could not parse e as an indexedItemsEntry")
|
|
}
|
|
|
|
skip, err := i.skipInsert(ctx, newEntry.itemID, newEntry.accountID, newEntry.boostOfID, newEntry.boostOfAccountID, entry.itemID, entry.accountID, entry.boostOfID, entry.boostOfAccountID, position)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
if skip {
|
|
return false, nil
|
|
}
|
|
|
|
// if the item to index is newer than e, insert it before e in the list
|
|
if insertMark == nil {
|
|
if newEntry.itemID > entry.itemID {
|
|
insertMark = e
|
|
}
|
|
}
|
|
}
|
|
|
|
if insertMark != nil {
|
|
i.data.InsertBefore(newEntry, insertMark)
|
|
return true, nil
|
|
}
|
|
|
|
// if we reach this point it's the oldest item we've seen so put it at the back
|
|
i.data.PushBack(newEntry)
|
|
return true, nil
|
|
}
|