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// 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 (
"maps"
"sync/atomic"
)
// StatusTimelines is a concurrency safe map of StatusTimeline{}
// objects, optimizing *very heavily* for reads over writes.
type StatusTimelines struct {
ptr atomic.Pointer[map[string]*StatusTimeline] // ronly except by CAS
cap int
}
// Init stores the given argument(s) such that any created StatusTimeline{}
// objects by MustGet() will initialize them with the given arguments.
func (t *StatusTimelines) Init(cap int) { t.cap = cap }
// MustGet will attempt to fetch StatusTimeline{} stored under key, else creating one.
func (t *StatusTimelines) MustGet(key string) *StatusTimeline {
var tt *StatusTimeline
for {
// Load current ptr.
cur := t.ptr.Load()
// Get timeline map to work on.
var m map[string]*StatusTimeline
if cur != nil {
// Look for existing
// timeline in cache.
tt = (*cur)[key]
if tt != nil {
return tt
}
// Get clone of current
// before modifications.
m = maps.Clone(*cur)
} else {
// Allocate new timeline map for below.
m = make(map[string]*StatusTimeline)
}
if tt == nil {
// Allocate new timeline.
tt = new(StatusTimeline)
tt.Init(t.cap)
}
// Store timeline
// in new map.
m[key] = tt
// Attempt to update the map ptr.
if !t.ptr.CompareAndSwap(cur, &m) {
// We failed the
// CAS, reloop.
continue
}
// Successfully inserted
// new timeline model.
return tt
}
}
// Delete will delete the stored StatusTimeline{} under key, if any.
func (t *StatusTimelines) Delete(key string) {
for {
// Load current ptr.
cur := t.ptr.Load()
// Check for empty map / not in map.
if cur == nil || (*cur)[key] == nil {
return
}
// Get clone of current
// before modifications.
m := maps.Clone(*cur)
// Delete ID.
delete(m, key)
// Attempt to update the map ptr.
if !t.ptr.CompareAndSwap(cur, &m) {
// We failed the
// CAS, reloop.
continue
}
// Successfully
// deleted ID.
return
}
}
// RemoveByStatusIDs calls RemoveByStatusIDs() for each of the stored StatusTimeline{}s.
func (t *StatusTimelines) RemoveByStatusIDs(statusIDs ...string) {
if p := t.ptr.Load(); p != nil {
for _, tt := range *p {
tt.RemoveByStatusIDs(statusIDs...)
}
}
}
// RemoveByAccountIDs calls RemoveByAccountIDs() for each of the stored StatusTimeline{}s.
func (t *StatusTimelines) RemoveByAccountIDs(accountIDs ...string) {
if p := t.ptr.Load(); p != nil {
for _, tt := range *p {
tt.RemoveByAccountIDs(accountIDs...)
}
}
}
// UnprepareByStatusIDs calls UnprepareByStatusIDs() for each of the stored StatusTimeline{}s.
func (t *StatusTimelines) UnprepareByStatusIDs(statusIDs ...string) {
if p := t.ptr.Load(); p != nil {
for _, tt := range *p {
tt.UnprepareByStatusIDs(statusIDs...)
}
}
}
// UnprepareByAccountIDs calls UnprepareByAccountIDs() for each of the stored StatusTimeline{}s.
func (t *StatusTimelines) UnprepareByAccountIDs(accountIDs ...string) {
if p := t.ptr.Load(); p != nil {
for _, tt := range *p {
tt.UnprepareByAccountIDs(accountIDs...)
}
}
}
// Unprepare attempts to call UnprepareAll() for StatusTimeline{} under key.
func (t *StatusTimelines) Unprepare(key string) {
if p := t.ptr.Load(); p != nil {
if tt := (*p)[key]; tt != nil {
tt.UnprepareAll()
}
}
}
// UnprepareAll calls UnprepareAll() for each of the stored StatusTimeline{}s.
func (t *StatusTimelines) UnprepareAll() {
if p := t.ptr.Load(); p != nil {
for _, tt := range *p {
tt.UnprepareAll()
}
}
}
// Trim calls Trim() for each of the stored StatusTimeline{}s.
func (t *StatusTimelines) Trim() {
if p := t.ptr.Load(); p != nil {
for _, tt := range *p {
tt.Trim()
}
}
}
// Clear attempts to call Clear() for StatusTimeline{} under key.
func (t *StatusTimelines) Clear(key string) {
if p := t.ptr.Load(); p != nil {
if tt := (*p)[key]; tt != nil {
tt.Clear()
}
}
}
// ClearAll calls Clear() for each of the stored StatusTimeline{}s.
func (t *StatusTimelines) ClearAll() {
if p := t.ptr.Load(); p != nil {
for _, tt := range *p {
tt.Clear()
}
}
}
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