feat: Add use based file scanner

1 files changed, 99 insertions, 0 deletions

diff --git a/pkg/worker/scanner/file_scanner.go b/pkg/worker/scanner/file_scanner.go
new file mode 100644
index 0000000..7c19a3d
--- /dev/null
+++ b/pkg/worker/scanner/file_scanner.go
@@ -0,0 +1,99 @@
+package scanner
+
+import (
+	"context"
+	"io/fs"
+	"mime"
+	"path/filepath"
+
+	"git.sr.ht/~gabrielgio/img/pkg/database/repository"
+	"git.sr.ht/~gabrielgio/img/pkg/fileop"
+	"git.sr.ht/~gabrielgio/img/pkg/list"
+	"git.sr.ht/~gabrielgio/img/pkg/worker"
+)
+
+type (
+	FileScanner struct {
+		mediaRepository repository.MediaRepository
+		userRepository  repository.UserRepository
+	}
+)
+
+var _ worker.ChanProcessor[string] = &FileScanner{}
+
+func NewFileScanner(
+	mediaRepository repository.MediaRepository,
+	userRepository repository.UserRepository,
+) *FileScanner {
+	return &FileScanner{
+		mediaRepository: mediaRepository,
+		userRepository:  userRepository,
+	}
+}
+
+func (f *FileScanner) Query(ctx context.Context) (<-chan string, error) {
+	c := make(chan string)
+
+	users, err := f.userRepository.List(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	// TODO: de duplicate file paths
+	paths := list.Map(users, func(u *repository.User) string { return u.Path })
+
+	go func(paths []string) {
+		defer close(c)
+		for _, p := range paths {
+			_ = filepath.Walk(p, func(path string, info fs.FileInfo, err error) error {
+				select {
+				case <-ctx.Done():
+					return filepath.SkipAll
+				default:
+				}
+
+				if info == nil {
+					return nil
+				}
+
+				if info.IsDir() && filepath.Base(info.Name())[0] == '.' {
+					return filepath.SkipDir
+				}
+
+				if info.IsDir() {
+					return nil
+				}
+
+				c <- path
+				return nil
+			})
+		}
+	}(paths)
+	return c, nil
+}
+
+func (f *FileScanner) Process(ctx context.Context, path string) error {
+	mimetype := mime.TypeByExtension(filepath.Ext(path))
+	supported := fileop.IsMimeTypeSupported(mimetype)
+	if !supported {
+		return nil
+	}
+
+	hash := fileop.GetHashFromPath(path)
+
+	exists, err := f.mediaRepository.Exists(ctx, hash)
+	if err != nil {
+		return err
+	}
+
+	if exists {
+		return nil
+	}
+
+	return f.mediaRepository.Create(ctx, &repository.CreateMedia{
+		Name:     filepath.Base(path),
+		Path:     path,
+		PathHash: hash,
+		MIMEType: mimetype,
+	})
+}