智能订餐管理系统核心功能拆解：订单管理 + 库存联动 + 数据统计一步到位，2025实操指南

// 订单状态枚举定义
public enum OrderStatus
{
    Pending,      // 待确认
    Confirmed,    // 已确认
    Preparing,    // 制作中
    Delivering,   // 配送中
    Completed,    // 已完成
    Cancelled     // 已取消
}

// 订单实体类
public class Order
{
    public int Id { get; set; }
    public string OrderNumber { get; set; }
    public OrderStatus Status { get; set; }
    public DateTime CreatedAt { get; set; }
    public decimal TotalAmount { get; set; }
    
    // 导航属性
    public virtual ICollection OrderItems { get; set; }
}

// 库存服务实现
public class InventoryService
{
    private readonly AppDbContext _context;
    
    public InventoryService(AppDbContext context)
    {
        _context = context;
    }
    
    // 扣减库存方法
    public async Task DeductInventoryAsync(int productId, decimal quantity)
    {
        var inventory = await _context.Inventories
            .FirstOrDefaultAsync(i => i.ProductId == productId);
            
        if (inventory == null || inventory.Quantity < quantity)
            return false;
            
        inventory.Quantity -= quantity;
        inventory.LastUpdated = DateTime.Now;
        
        await _context.SaveChangesAsync();
        return true;
    }
}

// 销售数据统计示例
async function getSalesData(startDate, endDate) {
  try {
    const response = await fetch(`/api/analytics/sales?start=${startDate}&end=${endDate}`);
    const data = await response.json();
    
    // 处理销售数据
    const dailySales = processDailySales(data);
    const popularItems = identifyPopularItems(data);
    
    return { dailySales, popularItems };
  } catch (error) {
    console.error('获取销售数据失败:', error);
    throw error;
  }
}

// 热门菜品识别
function identifyPopularItems(salesData) {
  return salesData
    .reduce((acc, order) => {
      order.items.forEach(item => {
        const existing = acc.find(i => i.id === item.productId);
        if (existing) {
          existing.quantity += item.quantity;
          existing.revenue += item.price * item.quantity;
        } else {
          acc.push({
            id: item.productId,
            name: item.productName,
            quantity: item.quantity,
            revenue: item.price * item.quantity
          });
        }
      });
      return acc;
    }, [])
    .sort((a, b) => b.quantity - a.quantity)
    .slice(0, 10); // 返回前10名热门菜品
}