mirror of
https://github.com/superseriousbusiness/gotosocial.git
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5e2bf0bdca* [chore] Remove years from all license headers Years or year ranges aren't required in license headers. Many projects have removed them in recent years and it avoids a bit of yearly toil. In many cases our copyright claim was also a bit dodgy since we added the 2021-2023 header to files created after 2021 but you can't claim copyright into the past that way. * [chore] Add license header check This ensures a license header is always added to any new file. This avoids maintainers/reviewers needing to remember to check for and ask for it in case a contribution doesn't include it. * [chore] Add missing license headers * [chore] Further updates to license header * Use the more common // indentend comment format * Remove the hack we had for the linter now that we use the // format * Add SPDX license identifier
85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package timeline
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import (
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"container/list"
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"context"
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"errors"
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)
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type indexedItems struct {
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data *list.List
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skipInsert SkipInsertFunction
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}
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type indexedItemsEntry struct {
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itemID string
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boostOfID string
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accountID string
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boostOfAccountID string
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}
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func (i *indexedItems) insertIndexed(ctx context.Context, newEntry *indexedItemsEntry) (bool, error) {
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if i.data == nil {
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i.data = &list.List{}
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}
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// if we have no entries yet, this is both the newest and oldest entry, so just put it in the front
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if i.data.Len() == 0 {
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i.data.PushFront(newEntry)
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return true, nil
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}
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var insertMark *list.Element
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var position int
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// We need to iterate through the index to make sure we put this item in the appropriate place according to when it was created.
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// We also need to make sure we're not inserting a duplicate item -- this can happen sometimes and it's not nice UX (*shudder*).
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for e := i.data.Front(); e != nil; e = e.Next() {
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position++
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entry, ok := e.Value.(*indexedItemsEntry)
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if !ok {
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return false, errors.New("insertIndexed: could not parse e as an indexedItemsEntry")
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}
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skip, err := i.skipInsert(ctx, newEntry.itemID, newEntry.accountID, newEntry.boostOfID, newEntry.boostOfAccountID, entry.itemID, entry.accountID, entry.boostOfID, entry.boostOfAccountID, position)
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if err != nil {
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return false, err
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}
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if skip {
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return false, nil
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}
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// if the item to index is newer than e, insert it before e in the list
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if insertMark == nil {
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if newEntry.itemID > entry.itemID {
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insertMark = e
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}
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}
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}
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if insertMark != nil {
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i.data.InsertBefore(newEntry, insertMark)
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return true, nil
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}
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// if we reach this point it's the oldest item we've seen so put it at the back
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i.data.PushBack(newEntry)
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return true, nil
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}
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