Add reinstate feature for deleted files

- Add MarkNotDeleted method to repository
- Add ReinstateFile method to service
- Add AdminReinstate handler
- Add /reinstate/:id route
- Add Reinstate button in admin menu for deleted files

internal/file/handlers.go

@@ -213,6 +213,23 @@ func (h *Handler) AdminForceDelete(c *gin.Context) {
 	c.Redirect(301, "/admin")
 }
 
+func (h *Handler) AdminReinstate(c *gin.Context) {
+	id := c.Param("id")
+
+	_, err := h.service.GetFileByID(id)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "file not found"})
+		return
+	}
+
+	if _, err := h.service.ReinstateFile(id); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.Redirect(301, "/admin")
+}
+
 func (h *Handler) Import(c *gin.Context) {
 	var records []ImportFileRecord
 

internal/file/repository.go

@@ -95,6 +95,12 @@ func (r *Repository) MarkDeleted(f *FileRecord) error {
 	return r.db.Save(f).Error
 }
 
+// MarkNotDeleted Restore a deleted record by setting Deleted to false
+func (r *Repository) MarkNotDeleted(f *FileRecord) error {
+	f.Deleted = false
+	return r.db.Save(f).Error
+}
+
 // Delete Permanently delete the record from the database
 func (r *Repository) Delete(f *FileRecord) error {
 	return r.db.Delete(f).Error

internal/file/routes.go

@@ -33,6 +33,7 @@ func RegisterRoutes(r *gin.RouterGroup, h *Handler) {
 
 	adminRoutes.GET("/delete/:id", h.AdminDelete)
 	adminRoutes.GET("/delete/fr/:id", h.AdminForceDelete)
+	adminRoutes.GET("/reinstate/:id", h.AdminReinstate)
 
 	adminRoutes.POST("/import", h.Import)
 	adminRoutes.GET("/export", h.Export)

internal/file/service.go

@@ -134,6 +134,29 @@ func (s *Service) ForceDelete(id string) (*FileRecord, error) {
 	return f, nil
 }
 
+func (s *Service) ReinstateFile(id string) (*FileRecord, error) {
+	f, err := s.repo.GetByID(id)
+	if err != nil {
+		return nil, err
+	}
+
+	if !f.Deleted {
+		return nil, ErrFileNotFound // or just return f, nil maybe?
+	}
+
+	// Check if file actually exists on disk
+	path := s.storageDir + "/" + f.ID
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		return nil, ErrFileNotFound
+	}
+
+	if err := s.repo.MarkNotDeleted(f); err != nil {
+		return nil, err
+	}
+
+	return f, nil
+}
+
 func (s *Service) GetPaginatedFiles(limit, offset int) ([]FileRecord, int, error) {
 	return s.repo.GetPaginated(limit, offset)
 }