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_file.go
+++ b/internal/domains/filesystem/music_file.go
@@ -0,0 +1,146 @@
+package filesystem
+
+import (
+	"context"
+	"log"
+	"os"
+	"path/filepath"
+	"syscall"
+	"time"
+
+	"github.com/hanwen/go-fuse/v2/fs"
+	"github.com/hanwen/go-fuse/v2/fuse"
+)
+
+type MusicFile struct {
+	fs.Inode
+
+	f           *FS
+	sourcePath  string
+	virtualName string
+	isMetaFile  bool
+}
+
+var (
+	_ = (fs.NodeGetattrer)((*MusicFile)(nil))
+	_ = (fs.NodeOpener)((*MusicFile)(nil))
+	_ = (fs.NodeSetattrer)((*MusicFile)(nil))
+)
+
+func (f *MusicFile) Getattr(ctx context.Context, fh fs.FileHandle, out *fuse.AttrOut) syscall.Errno {
+	if f.isMetaFile {
+		metaPath := filepath.Join(f.f.metadataDir, f.virtualName)
+
+		if info, err := os.Stat(metaPath); err == nil {
+			out.Mode = fuse.S_IFREG | 0644
+			out.Nlink = 1
+			out.Ino = f.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
+		} else {
+			out.Mode = fuse.S_IFREG | 0644
+			out.Nlink = 1
+			out.Ino = f.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 | 0444
+	out.Nlink = 1
+	out.Ino = f.StableAttr().Ino
+	out.Blocks = 1
+
+	if size, err := f.f.cacher.GetStat(f.sourcePath); err == nil {
+		out.Size = uint64(size)
+		out.Blocks = (out.Size + 511) / 512
+	} else {
+		out.Size = 0
+	}
+
+	out.Mtime = uint64(time.Now().Unix())
+	out.Atime = out.Mtime
+	out.Ctime = out.Mtime
+
+	return 0
+}
+
+func (f *MusicFile) Setattr(ctx context.Context, fh fs.FileHandle, in *fuse.SetAttrIn, out *fuse.AttrOut) syscall.Errno {
+	if f.isMetaFile {
+		metaPath := filepath.Join(f.f.metadataDir, f.virtualName)
+		if info, err := os.Stat(metaPath); err == nil {
+			out.Mode = fuse.S_IFREG | 0644
+			out.Nlink = 1
+			out.Ino = f.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
+		} else {
+			out.Mode = fuse.S_IFREG | 0644
+			out.Nlink = 1
+			out.Ino = f.StableAttr().Ino
+			out.Size = 0
+			out.Mtime = uint64(time.Now().Unix())
+			out.Atime = out.Mtime
+			out.Ctime = out.Mtime
+			out.Blocks = 1
+		}
+
+		return 0
+	}
+
+	return syscall.EPERM
+}
+
+func (f *MusicFile) Open(ctx context.Context, flags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
+	if f.isMetaFile {
+		metaPath := filepath.Join(f.f.metadataDir, f.virtualName)
+
+		file, err := os.OpenFile(metaPath, int(flags), 0644)
+		if err != nil && os.IsNotExist(err) {
+			file, err = os.Create(metaPath)
+		}
+		if err != nil {
+			return nil, 0, syscall.EIO
+		}
+
+		return &File{file: file}, fuse.FOPEN_DIRECT_IO, 0
+	}
+
+	if flags&fuse.O_ANYWRITE != 0 {
+		return nil, 0, syscall.EPERM
+	}
+
+	entry, err := f.f.cacher.GetFileDTO(f.sourcePath)
+	if err != nil {
+		log.Printf("Failed to convert %s to ALAC: %v", filepath.Base(f.sourcePath), err)
+
+		return nil, 0, syscall.EIO
+	}
+
+	file, err := os.Open(entry.Path)
+	if err != nil {
+		return nil, 0, syscall.EIO
+	}
+
+	return &File{file: file}, fuse.FOPEN_KEEP_CACHE, 0
+}
+
+func (f *FS) NewMusicFile(sourcePath, virtualName string, isMetaFile bool) *MusicFile {
+	return &MusicFile{
+		f:           f,
+		sourcePath:  sourcePath,
+		virtualName: virtualName,
+		isMetaFile:  isMetaFile,
+	}
+}