feat(modpack): modpack updates

internal/api/modpack_handler.go

@@ -1,20 +1,24 @@
 package api
 
 import (
+	"context"
 	"fmt"
 	"io"
 	"net/http"
 	"os"
 
+	"gitea.mrixs.me/minecraft-platform/backend/internal/core"
 	"gitea.mrixs.me/minecraft-platform/backend/internal/core/importer"
 	"gitea.mrixs.me/minecraft-platform/backend/internal/database"
 	"gitea.mrixs.me/minecraft-platform/backend/internal/models"
 )
 
 type ModpackHandler struct {
-	ModpackRepo *database.ModpackRepository
+	ModpackRepo    *database.ModpackRepository
+	JanitorService *core.FileJanitorService
 }
 
+// ImportModpack обрабатывает загрузку и импорт модпака.
 func (h *ModpackHandler) ImportModpack(w http.ResponseWriter, r *http.Request) {
 	if err := r.ParseMultipartForm(512 << 20); err != nil { // 512 MB лимит
 		http.Error(w, "File too large", http.StatusBadRequest)
@@ -65,4 +69,7 @@ func (h *ModpackHandler) ImportModpack(w http.ResponseWriter, r *http.Request) {
 
 	w.WriteHeader(http.StatusCreated)
 	fmt.Fprintf(w, "Modpack '%s' imported successfully with %d files.", modpack.DisplayName, len(files))
+
+	// Запускаем очистку в фоне, чтобы не блокировать ответ
+	go h.JanitorService.CleanOrphanedFiles(context.Background())
 }

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)
+}

internal/database/modpack_repository.go

@@ -1,4 +1,3 @@
-// File: backend/internal/database/modpack_repository.go
 package database
 
 import (
@@ -81,3 +80,24 @@ func (r *ModpackRepository) GetModpackManifest(ctx context.Context, modpackName
 
 	return manifest, nil
 }
+
+// GetAllFileHashes извлекает все уникальные хеши файлов из базы данных.
+func (r *ModpackRepository) GetAllFileHashes(ctx context.Context) (map[string]struct{}, error) {
+	query := "SELECT DISTINCT file_hash FROM modpack_files"
+	rows, err := r.DB.Query(ctx, query)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	hashes := make(map[string]struct{})
+	for rows.Next() {
+		var hash string
+		if err := rows.Scan(&hash); err != nil {
+			return nil, err
+		}
+		hashes[hash] = struct{}{}
+	}
+
+	return hashes, rows.Err()
+}