[bugfix/chore] Refactor timeline code (#1656)

* start poking timelines

* OK yes we're refactoring, but it's nothing like the last time so don't worry

* more fiddling

* update tests, simplify Get

* thanks linter, you're the best, mwah mwah kisses

* do a bit more tidying up

* start buggering about with the prepare function

* fix little oopsie

* start merging lists into 1

* ik heb een heel zwaar leven
nee nee echt waar

* hey it works we did it reddit

* regenerate swagger docs

* tidy up a wee bit

* adjust paging

* fix little error, remove unused functions

1 files changed, 0 insertions, 91 deletions

diff --git a/internal/timeline/prepareditems.go b/internal/timeline/prepareditems.go
deleted file mode 100644
index 86bb6ad69..000000000
--- a/internal/timeline/prepareditems.go
+++ /dev/null
@@ -1,91 +0,0 @@
-// 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 (
-	"container/list"
-	"context"
-	"errors"
-)
-
-type preparedItems struct {
-	data       *list.List
-	skipInsert SkipInsertFunction
-}
-
-type preparedItemsEntry struct {
-	itemID           string
-	boostOfID        string
-	accountID        string
-	boostOfAccountID string
-	prepared         Preparable
-}
-
-func (p *preparedItems) insertPrepared(ctx context.Context, newEntry *preparedItemsEntry) error {
-	if p.data == nil {
-		p.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 p.data.Len() == 0 {
-		p.data.PushFront(newEntry)
-		return nil
-	}
-
-	var insertMark *list.Element
-	var position int
-	// We need to iterate through the index to make sure we put this entry in the appropriate place according to when it was created.
-	// We also need to make sure we're not inserting a duplicate entry -- this can happen sometimes and it's not nice UX (*shudder*).
-	for e := p.data.Front(); e != nil; e = e.Next() {
-		position++
-
-		entry, ok := e.Value.(*preparedItemsEntry)
-		if !ok {
-			return errors.New("insertPrepared: could not parse e as a preparedItemsEntry")
-		}
-
-		skip, err := p.skipInsert(ctx, newEntry.itemID, newEntry.accountID, newEntry.boostOfID, newEntry.boostOfAccountID, entry.itemID, entry.accountID, entry.boostOfID, entry.boostOfAccountID, position)
-		if err != nil {
-			return err
-		}
-		if skip {
-			return nil
-		}
-
-		// if the entry to index is newer than e, insert it before e in the list
-		if insertMark == nil {
-			if newEntry.itemID > entry.itemID {
-				insertMark = e
-			}
-		}
-
-		// make sure we don't insert a duplicate
-		if entry.itemID == newEntry.itemID {
-			return nil
-		}
-	}
-
-	if insertMark != nil {
-		p.data.InsertBefore(newEntry, insertMark)
-		return nil
-	}
-
-	// if we reach this point it's the oldest entry we've seen so put it at the back
-	p.data.PushBack(newEntry)
-	return nil
-}