电商仓储物料管理系统：发货物料拣选 / 包装物料库存预警（提升发货效率）

// 库存预警服务示例
public class InventoryAlertService
{
    private readonly IInventoryRepository _inventoryRepo;
    private readonly INotificationService _notificationService;
    
    public InventoryAlertService(IInventoryRepository inventoryRepo, 
                                INotificationService notificationService)
    {
        _inventoryRepo = inventoryRepo;
        _notificationService = notificationService;
    }
    
    // 检查库存水平并触发预警
    public async Task CheckInventoryLevels()
    {
        var materials = await _inventoryRepo.GetLowStockMaterialsAsync();
        
        foreach (var material in materials)
        {
            if (material.CurrentStock <= material.SafetyStockLevel)
            {
                // 触发库存预警通知
                await _notificationService.SendLowStockAlertAsync(
                    material.Id, 
                    material.Name, 
                    material.CurrentStock, 
                    material.SafetyStockLevel);
            }
        }
    }
}

// 库存物料实体类
public class PackagingMaterial
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string SKU { get; set; }
    public int CurrentStock { get; set; }
    public int SafetyStockLevel { get; set; }
    public int ReorderPoint { get; set; }
    public DateTime LastRestocked { get; set; }
}