feat(modpack): modpack updates

internal/core/file_janitor.go

@@ -0,0 +1,61 @@
+package core
+
+import (
+	"context"
+	"log"
+	"os"
+	"path/filepath"
+
+	"gitea.mrixs.me/minecraft-platform/backend/internal/database"
+)
+
+// FileJanitorService отвечает за очистку осиротевших файлов.
+type FileJanitorService struct {
+	ModpackRepo *database.ModpackRepository
+	StoragePath string
+}
+
+// NewFileJanitorService создает новый экземпляр сервиса-уборщика.
+func NewFileJanitorService(repo *database.ModpackRepository, storagePath string) *FileJanitorService {
+	return &FileJanitorService{
+		ModpackRepo: repo,
+		StoragePath: storagePath,
+	}
+}
+
+// CleanOrphanedFiles сканирует хранилище и удаляет файлы, отсутствующие в БД.
+func (s *FileJanitorService) CleanOrphanedFiles(ctx context.Context) {
+	log.Println("Janitor: Starting orphaned file cleanup...")
+
+	liveHashes, err := s.ModpackRepo.GetAllFileHashes(ctx)
+	if err != nil {
+		log.Printf("Janitor: Error getting live hashes from DB: %v", err)
+		return
+	}
+
+	diskFiles, err := os.ReadDir(s.StoragePath)
+	if err != nil {
+		log.Printf("Janitor: Error reading storage directory %s: %v", s.StoragePath, err)
+		return
+	}
+
+	removedCount := 0
+	for _, file := range diskFiles {
+		if file.IsDir() {
+			continue
+		}
+
+		fileName := file.Name()
+		if _, isLive := liveHashes[fileName]; !isLive {
+			filePath := filepath.Join(s.StoragePath, fileName)
+			if err := os.Remove(filePath); err != nil {
+				log.Printf("Janitor: Failed to remove orphaned file %s: %v", filePath, err)
+			} else {
+				log.Printf("Janitor: Removed orphaned file %s", filePath)
+				removedCount++
+			}
+		}
+	}
+
+	log.Printf("Janitor: Cleanup complete. Removed %d orphaned files.", removedCount)
+}