start work rewriting timeline cache type

internal/cache/timeline.go

@@ -0,0 +1,131 @@
+// 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 cache
+
+import (
+	"codeberg.org/gruf/go-structr"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/cache/timeline"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/log"
+)
+
+type TimelineCaches struct {
+
+	// Home ...
+	Home TimelinesCache[*gtsmodel.Status]
+
+	// List ...
+	List TimelinesCache[*gtsmodel.Status]
+
+	// Public ...
+	Public timeline.StatusTimeline
+}
+
+func (c *Caches) initHomeTimelines() {
+	cap := 1000
+
+	log.Infof(nil, "cache size = %d", cap)
+
+	c.Timelines.Home.Init(structr.TimelineConfig[*gtsmodel.Status, string]{
+		PKey: "StatusID",
+		Indices: []structr.IndexConfig{
+			{Fields: "StatusID"},
+			{Fields: "AccountID"},
+			{Fields: "BoostOfStatusID"},
+			{Fields: "BoostOfAccountID"},
+		},
+		Copy: copyStatus,
+	}, cap)
+}
+
+func (c *Caches) initListTimelines() {
+	cap := 1000
+
+	log.Infof(nil, "cache size = %d", cap)
+
+	c.Timelines.List.Init(structr.TimelineConfig[*gtsmodel.Status, string]{
+		PKey: "StatusID",
+		Indices: []structr.IndexConfig{
+			{Fields: "StatusID"},
+			{Fields: "AccountID"},
+			{Fields: "BoostOfStatusID"},
+			{Fields: "BoostOfAccountID"},
+		},
+		Copy: copyStatus,
+	}, cap)
+}
+
+func (c *Caches) initPublicTimeline() {
+	cap := 1000
+
+	log.Infof(nil, "cache size = %d", cap)
+
+	c.Timelines.Public.Init(cap)
+}
+
+type TimelineStatus struct {
+
+	// ID ...
+	ID string
+
+	// AccountID ...
+	AccountID string
+
+	// BoostOfID ...
+	BoostOfID string
+
+	// BoostOfAccountID ...
+	BoostOfAccountID string
+
+	// Local ...
+	Local bool
+
+	// Loaded is a temporary field that may be
+	// set for a newly loaded timeline status
+	// so that statuses don't need to be loaded
+	// from the database twice in succession.
+	//
+	// i.e. this will only be set if the status
+	// was newly inserted into the timeline cache.
+	// for existing cache items this will be nil.
+	Loaded *gtsmodel.Status
+
+	// Prepared contains prepared frontend API
+	// model for the referenced status. This may
+	// or may-not be nil depending on whether the
+	// status has been "unprepared" since the last
+	// call to "prepare" the frontend model.
+	Prepared *apimodel.Status
+}
+
+func (s *TimelineStatus) Copy() *TimelineStatus {
+	var prepared *apimodel.Status
+	if s.Prepared != nil {
+		prepared = new(apimodel.Status)
+		*prepared = *s.Prepared
+	}
+	return &TimelineStatus{
+		ID:               s.ID,
+		AccountID:        s.AccountID,
+		BoostOfID:        s.BoostOfID,
+		BoostOfAccountID: s.BoostOfAccountID,
+		Loaded:           nil, // NEVER set
+		Prepared:         prepared,
+	}
+}