Initial commit

Proof-of-concept implementation. Bugs will occur.
2026-02-12 01:18:46 +03:00
commit 13ac06c14b
553 changed files with 253003 additions and 0 deletions
--- a/internal/domains/filesystem/music_app_metadata.go
+++ b/internal/domains/filesystem/music_app_metadata.go
@@ -0,0 +1,158 @@
+package filesystem
+
+import (
+	"context"
+	"os"
+	"strings"
+	"syscall"
+	"time"
+
+	"github.com/hanwen/go-fuse/v2/fs"
+	"github.com/hanwen/go-fuse/v2/fuse"
+)
+
+type MusicAppMetadataFile struct {
+	fs.Inode
+
+	f    *FS
+	path string
+}
+
+var (
+	_ = (fs.NodeGetattrer)((*MusicAppMetadataFile)(nil))
+	_ = (fs.NodeOpener)((*MusicAppMetadataFile)(nil))
+	_ = (fs.NodeCreater)((*MusicAppMetadataFile)(nil))
+	_ = (fs.NodeWriter)((*MusicAppMetadataFile)(nil))
+	_ = (fs.NodeSetattrer)((*MusicAppMetadataFile)(nil))
+	_ = (fs.NodeUnlinker)((*MusicAppMetadataFile)(nil))
+)
+
+func (m *MusicAppMetadataFile) Getattr(ctx context.Context, fh fs.FileHandle, out *fuse.AttrOut) syscall.Errno {
+	info, err := os.Stat(m.path)
+	if err != nil {
+		out.Mode = fuse.S_IFREG | 0644
+		out.Nlink = 1
+		out.Ino = m.StableAttr().Ino
+		out.Size = 0
+		out.Mtime = uint64(time.Now().Unix())
+		out.Atime = out.Mtime
+		out.Ctime = out.Mtime
+		out.Blocks = 1
+
+		return 0
+	}
+
+	out.Mode = fuse.S_IFREG | uint32(info.Mode())
+	out.Nlink = 1
+	out.Ino = m.StableAttr().Ino
+	out.Size = uint64(info.Size())
+	out.Mtime = uint64(info.ModTime().Unix())
+	out.Atime = out.Mtime
+	out.Ctime = out.Mtime
+	out.Blocks = (out.Size + 511) / 512
+
+	return 0
+}
+
+func (m *MusicAppMetadataFile) Setattr(ctx context.Context, fh fs.FileHandle, in *fuse.SetAttrIn, out *fuse.AttrOut) syscall.Errno {
+	info, err := os.Stat(m.path)
+	if err != nil {
+		out.Mode = fuse.S_IFREG | 0644
+		out.Nlink = 1
+		out.Ino = m.StableAttr().Ino
+		out.Size = 0
+		out.Mtime = uint64(time.Now().Unix())
+		out.Atime = out.Mtime
+		out.Ctime = out.Mtime
+		out.Blocks = 1
+	} else {
+		out.Mode = fuse.S_IFREG | uint32(info.Mode())
+		out.Nlink = 1
+		out.Ino = m.StableAttr().Ino
+		out.Size = uint64(info.Size())
+		out.Mtime = uint64(info.ModTime().Unix())
+		out.Atime = out.Mtime
+		out.Ctime = out.Mtime
+		out.Blocks = (out.Size + 511) / 512
+	}
+
+	return 0
+}
+
+func (m *MusicAppMetadataFile) Create(ctx context.Context, name string, flags uint32, mode uint32, out *fuse.EntryOut) (node *fs.Inode, fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
+	file, err := os.Create(m.path)
+	if err != nil {
+		return nil, nil, 0, syscall.EIO
+	}
+
+	ch := m.NewInode(ctx, &MusicAppMetadataFile{path: m.path}, fs.StableAttr{
+		Mode: fuse.S_IFREG,
+		Ino:  m.f.nextInode(),
+	})
+
+	out.Mode = fuse.S_IFREG | 0644
+	out.Nlink = 1
+	out.Ino = ch.StableAttr().Ino
+	out.Size = 0
+	out.Mtime = uint64(time.Now().Unix())
+	out.Atime = out.Mtime
+	out.Ctime = out.Mtime
+	out.Blocks = 1
+
+	return ch, &File{file: file}, fuse.FOPEN_DIRECT_IO, 0
+}
+
+func (m *MusicAppMetadataFile) Open(ctx context.Context, flags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
+	if _, err := os.Stat(m.path); os.IsNotExist(err) {
+		if err := os.WriteFile(m.path, []byte{}, 0644); err != nil {
+			return nil, 0, syscall.EIO
+		}
+	}
+
+	file, err := os.OpenFile(m.path, int(flags), 0644)
+	if err != nil {
+		return nil, 0, syscall.EIO
+	}
+
+	return &File{file: file}, fuse.FOPEN_DIRECT_IO, 0
+}
+
+func (m *MusicAppMetadataFile) Write(ctx context.Context, fh fs.FileHandle, data []byte, off int64) (written uint32, errno syscall.Errno) {
+	handle, ok := fh.(*File)
+	if !ok {
+		return 0, syscall.EBADF
+	}
+
+	n, err := handle.file.WriteAt(data, off)
+	if err != nil {
+		return 0, syscall.EIO
+	}
+
+	return uint32(n), 0
+}
+
+func (m *MusicAppMetadataFile) Unlink(ctx context.Context, name string) syscall.Errno {
+	if err := os.Remove(m.path); err != nil {
+		return syscall.ENOENT
+	}
+	return 0
+}
+
+func (f *FS) isiTunesMetadata(name string) bool {
+	name = strings.ToLower(name)
+
+	return strings.HasPrefix(name, ".") ||
+		strings.Contains(name, "albumart") ||
+		strings.Contains(name, "folder") ||
+		strings.Contains(name, "itunes") ||
+		strings.HasSuffix(name, ".itl") ||
+		strings.HasSuffix(name, ".xml") ||
+		strings.HasSuffix(name, ".db")
+}
+
+func (f *FS) NewMusicAppMetadataFile(path string) *MusicAppMetadataFile {
+	return &MusicAppMetadataFile{
+		f:    f,
+		path: path,
+	}
+}