siyuan/kernel/model/assets_watcher.go

120 lines
3.0 KiB
Go

// SiYuan - Refactor your thinking
// Copyright (c) 2020-present, b3log.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 <https://www.gnu.org/licenses/>.
//go:build !darwin
package model
import (
"os"
"path/filepath"
"time"
"github.com/88250/gulu"
"github.com/fsnotify/fsnotify"
"github.com/siyuan-note/logging"
"github.com/siyuan-note/siyuan/kernel/cache"
"github.com/siyuan-note/siyuan/kernel/util"
)
var assetsWatcher *fsnotify.Watcher
func WatchAssets() {
if util.ContainerAndroid == util.Container || util.ContainerIOS == util.Container || util.ContainerHarmony == util.Container {
return
}
go func() {
watchAssets()
}()
}
func watchAssets() {
assetsDir := filepath.Join(util.DataDir, "assets")
if nil != assetsWatcher {
assetsWatcher.Close()
}
var err error
if assetsWatcher, err = fsnotify.NewWatcher(); err != nil {
logging.LogErrorf("add assets watcher for folder [%s] failed: %s", assetsDir, err)
return
}
go func() {
defer logging.Recover()
var (
timer *time.Timer
lastEvent fsnotify.Event
)
timer = time.NewTimer(100 * time.Millisecond)
<-timer.C // timer should be expired at first
for {
select {
case event, ok := <-assetsWatcher.Events:
if !ok {
return
}
lastEvent = event
timer.Reset(time.Millisecond * 100)
if lastEvent.Op&fsnotify.Rename == fsnotify.Rename || lastEvent.Op&fsnotify.Write == fsnotify.Write {
IndexAssetContent(lastEvent.Name)
} else if lastEvent.Op&fsnotify.Remove == fsnotify.Remove {
RemoveIndexAssetContent(lastEvent.Name)
}
case err, ok := <-assetsWatcher.Errors:
if !ok {
return
}
logging.LogErrorf("watch assets failed: %s", err)
case <-timer.C:
//logging.LogInfof("assets changed: %s", lastEvent)
if lastEvent.Op&fsnotify.Write == fsnotify.Write {
IncSync()
}
// 重新缓存资源文件,以便使用 /资源 搜索
go cache.LoadAssets()
if lastEvent.Op&fsnotify.Remove == fsnotify.Remove {
RemoveIndexAssetContent(lastEvent.Name)
} else {
IndexAssetContent(lastEvent.Name)
}
}
}
}()
if !gulu.File.IsDir(assetsDir) {
os.MkdirAll(assetsDir, 0755)
}
if err = assetsWatcher.Add(assetsDir); err != nil {
logging.LogErrorf("add assets watcher for folder [%s] failed: %s", assetsDir, err)
}
//logging.LogInfof("added file watcher [%s]", assetsDir)
}
func CloseWatchAssets() {
if nil != assetsWatcher {
assetsWatcher.Close()
}
}