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editor-fs-locks.go
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editor-fs-locks.go
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// Copyright (c) 2023 The Go-Enjin Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package fs_editor
import (
"fmt"
"os"
"strings"
"github.com/go-corelibs/path"
"github.com/go-enjin/be/pkg/userbase"
)
func (f *CEditorFeature[MakeTypedFeature]) LockEditorFile(eid, fsid, filePath string) (err error) {
if !userbase.IsValidEID(eid) {
err = fmt.Errorf("invalid EID value")
return
}
checkPath := path.TrimSlashes(filePath)
lockPath := checkPath + ".~lock"
for _, efs := range f.EditingFileSystems {
if efs.Tag().String() == fsid {
var hasRWFS, exists bool
for _, mountedPoints := range efs.GetMountedPoints() {
for _, mountPoint := range mountedPoints {
if !strings.HasPrefix("/"+lockPath, mountPoint.Mount) {
continue
} else if hasRWFS = mountPoint.RWFS != nil; hasRWFS {
if exists = mountPoint.RWFS.Exists(checkPath); exists {
err = mountPoint.RWFS.WriteFile(lockPath, []byte(eid), 0664)
return
}
}
}
}
if !hasRWFS {
err = fmt.Errorf("%s filesystem is read-only", fsid)
return
}
err = os.ErrNotExist
return
}
}
err = os.ErrNotExist
return
}
func (f *CEditorFeature[MakeTypedFeature]) IsEditorFileLocked(fsid, filePath string) (eid string, locked bool) {
checkPath := path.TrimSlashes(filePath)
lockPath := checkPath + ".~lock"
for _, efs := range f.EditingFileSystems {
if efs.Tag().String() == fsid {
for _, mountedPoints := range efs.GetMountedPoints() {
for _, mountPoint := range mountedPoints {
if !strings.HasPrefix("/"+lockPath, mountPoint.Mount) {
continue
} else if mountPoint.RWFS != nil {
if mountPoint.RWFS.Exists(lockPath) {
if data, err := mountPoint.RWFS.ReadFile(lockPath); err == nil {
if value := string(data); userbase.IsValidEID(value) {
eid = value
locked = true
return
}
}
return
}
}
}
}
return
}
}
return
}
func (f *CEditorFeature[MakeTypedFeature]) UnLockEditorFile(fsid, filePath string) (err error) {
if _, locked := f.IsEditorFileLocked(fsid, filePath); !locked {
return
}
checkPath := path.TrimSlashes(filePath)
lockPath := checkPath + ".~lock"
for _, efs := range f.EditingFileSystems {
if efs.Tag().String() == fsid {
for _, mountedPoints := range efs.GetMountedPoints() {
for _, mountPoint := range mountedPoints {
if !strings.HasPrefix("/"+lockPath, mountPoint.Mount) {
continue
} else if mountPoint.RWFS != nil && mountPoint.RWFS.Exists(lockPath) {
err = mountPoint.RWFS.Remove(lockPath)
return
}
}
}
return
}
}
return
}