feat: add mini ordering catalog and order APIs

src/Domain/TakeoutSaaS.Domain/Orders/Entities/Order.cs

@@ -0,0 +1,92 @@
+using TakeoutSaaS.Domain.Orders.Enums;
+using TakeoutSaaS.Domain.Payments.Enums;
+using TakeoutSaaS.Shared.Abstractions.Entities;
+
+namespace TakeoutSaaS.Domain.Orders.Entities;
+
+/// <summary>
+/// 小程序订单聚合根。
+/// </summary>
+public sealed class Order : MultiTenantEntityBase
+{
+    /// <summary>
+    /// 订单号。
+    /// </summary>
+    public string OrderNo { get; set; } = string.Empty;
+    /// <summary>
+    /// 门店 ID。
+    /// </summary>
+    public long StoreId { get; set; }
+    /// <summary>
+    /// 下单渠道。
+    /// </summary>
+    public OrderChannel Channel { get; set; } = OrderChannel.MiniProgram;
+    /// <summary>
+    /// 履约方式。
+    /// </summary>
+    public DeliveryType DeliveryType { get; set; } = DeliveryType.Delivery;
+    /// <summary>
+    /// 订单状态。
+    /// </summary>
+    public OrderStatus Status { get; set; } = OrderStatus.PendingPayment;
+    /// <summary>
+    /// 支付状态。
+    /// </summary>
+    public PaymentStatus PaymentStatus { get; set; } = PaymentStatus.Unpaid;
+    /// <summary>
+    /// 顾客姓名。
+    /// </summary>
+    public string? CustomerName { get; set; }
+    /// <summary>
+    /// 顾客手机号。
+    /// </summary>
+    public string? CustomerPhone { get; set; }
+    /// <summary>
+    /// 桌号。
+    /// </summary>
+    public string? TableNo { get; set; }
+    /// <summary>
+    /// 排队号。
+    /// </summary>
+    public string? QueueNumber { get; set; }
+    /// <summary>
+    /// 预约 ID。
+    /// </summary>
+    public long? ReservationId { get; set; }
+    /// <summary>
+    /// 商品原价合计。
+    /// </summary>
+    public decimal ItemsAmount { get; set; }
+    /// <summary>
+    /// 优惠金额。
+    /// </summary>
+    public decimal DiscountAmount { get; set; }
+    /// <summary>
+    /// 应付金额。
+    /// </summary>
+    public decimal PayableAmount { get; set; }
+    /// <summary>
+    /// 实付金额。
+    /// </summary>
+    public decimal PaidAmount { get; set; }
+    /// <summary>
+    /// 支付时间。
+    /// </summary>
+    public DateTime? PaidAt { get; set; }
+    /// <summary>
+    /// 完成时间。
+    /// </summary>
+    public DateTime? FinishedAt { get; set; }
+    /// <summary>
+    /// 取消时间。
+    /// </summary>
+    public DateTime? CancelledAt { get; set; }
+    /// <summary>
+    /// 取消原因。
+    /// </summary>
+    public string? CancelReason { get; set; }
+    /// <summary>
+    /// 订单备注。
+    /// </summary>
+    public string? Remark { get; set; }
+}

src/Domain/TakeoutSaaS.Domain/Orders/Entities/OrderItem.cs

@@ -0,0 +1,50 @@
+using TakeoutSaaS.Shared.Abstractions.Entities;
+
+namespace TakeoutSaaS.Domain.Orders.Entities;
+
+/// <summary>
+/// 订单明细。
+/// </summary>
+public sealed class OrderItem : MultiTenantEntityBase
+{
+    /// <summary>
+    /// 订单 ID。
+    /// </summary>
+    public long OrderId { get; set; }
+    /// <summary>
+    /// 商品 ID。
+    /// </summary>
+    public long ProductId { get; set; }
+    /// <summary>
+    /// 商品名称。
+    /// </summary>
+    public string ProductName { get; set; } = string.Empty;
+    /// <summary>
+    /// SKU 名称。
+    /// </summary>
+    public string? SkuName { get; set; }
+    /// <summary>
+    /// 单位。
+    /// </summary>
+    public string? Unit { get; set; }
+    /// <summary>
+    /// 数量。
+    /// </summary>
+    public int Quantity { get; set; }
+    /// <summary>
+    /// 单价。
+    /// </summary>
+    public decimal UnitPrice { get; set; }
+    /// <summary>
+    /// 优惠金额。
+    /// </summary>
+    public decimal DiscountAmount { get; set; }
+    /// <summary>
+    /// 小计。
+    /// </summary>
+    public decimal SubTotal { get; set; }
+    /// <summary>
+    /// 属性 JSON。
+    /// </summary>
+    public string? AttributesJson { get; set; }
+}

src/Domain/TakeoutSaaS.Domain/Orders/Entities/OrderStatusHistory.cs

@@ -0,0 +1,31 @@
+using TakeoutSaaS.Domain.Orders.Enums;
+using TakeoutSaaS.Shared.Abstractions.Entities;
+
+namespace TakeoutSaaS.Domain.Orders.Entities;
+
+/// <summary>
+/// 订单状态流转记录。
+/// </summary>
+public sealed class OrderStatusHistory : MultiTenantEntityBase
+{
+    /// <summary>
+    /// 订单 ID。
+    /// </summary>
+    public long OrderId { get; set; }
+    /// <summary>
+    /// 变更后的状态。
+    /// </summary>
+    public OrderStatus Status { get; set; }
+    /// <summary>
+    /// 操作人 ID。
+    /// </summary>
+    public long? OperatorId { get; set; }
+    /// <summary>
+    /// 备注。
+    /// </summary>
+    public string? Notes { get; set; }
+    /// <summary>
+    /// 发生时间。
+    /// </summary>
+    public DateTime OccurredAt { get; set; } = DateTime.UtcNow;
+}

src/Domain/TakeoutSaaS.Domain/Orders/Enums/DeliveryType.cs

@@ -0,0 +1,20 @@
+namespace TakeoutSaaS.Domain.Orders.Enums;
+
+/// <summary>
+/// 履约方式。
+/// </summary>
+public enum DeliveryType
+{
+    /// <summary>
+    /// 堂食。
+    /// </summary>
+    DineIn = 0,
+    /// <summary>
+    /// 自提。
+    /// </summary>
+    Pickup = 1,
+    /// <summary>
+    /// 配送。
+    /// </summary>
+    Delivery = 2
+}

src/Domain/TakeoutSaaS.Domain/Orders/Enums/OrderChannel.cs

@@ -0,0 +1,20 @@
+namespace TakeoutSaaS.Domain.Orders.Enums;
+
+/// <summary>
+/// 下单渠道。
+/// </summary>
+public enum OrderChannel
+{
+    /// <summary>
+    /// 未知渠道。
+    /// </summary>
+    Unknown = 0,
+    /// <summary>
+    /// 小程序。
+    /// </summary>
+    MiniProgram = 1,
+    /// <summary>
+    /// 扫码点餐。
+    /// </summary>
+    ScanToOrder = 2
+}

src/Domain/TakeoutSaaS.Domain/Orders/Enums/OrderStatus.cs

@@ -0,0 +1,32 @@
+namespace TakeoutSaaS.Domain.Orders.Enums;
+
+/// <summary>
+/// 订单状态。
+/// </summary>
+public enum OrderStatus
+{
+    /// <summary>
+    /// 待付款。
+    /// </summary>
+    PendingPayment = 0,
+    /// <summary>
+    /// 已付款待制作。
+    /// </summary>
+    AwaitingPreparation = 1,
+    /// <summary>
+    /// 制作中。
+    /// </summary>
+    InProgress = 2,
+    /// <summary>
+    /// 待取餐或待送达。
+    /// </summary>
+    Ready = 3,
+    /// <summary>
+    /// 已完成。
+    /// </summary>
+    Completed = 4,
+    /// <summary>
+    /// 已取消。
+    /// </summary>
+    Cancelled = 5
+}

src/Domain/TakeoutSaaS.Domain/Orders/Repositories/IOrderRepository.cs

@@ -0,0 +1,30 @@
+using TakeoutSaaS.Domain.Orders.Entities;
+
+namespace TakeoutSaaS.Domain.Orders.Repositories;
+
+/// <summary>
+/// 订单写仓储。
+/// </summary>
+public interface IOrderRepository
+{
+    /// <summary>
+    /// 新增订单。
+    /// </summary>
+    Task AddAsync(Order order, CancellationToken cancellationToken = default);
+    /// <summary>
+    /// 批量新增订单明细。
+    /// </summary>
+    Task AddItemsAsync(IReadOnlyCollection<OrderItem> items, CancellationToken cancellationToken = default);
+    /// <summary>
+    /// 新增状态流转记录。
+    /// </summary>
+    Task AddStatusHistoryAsync(OrderStatusHistory history, CancellationToken cancellationToken = default);
+    /// <summary>
+    /// 查询可写订单。
+    /// </summary>
+    Task<Order?> FindAsync(long tenantId, long orderId, CancellationToken cancellationToken = default);
+    /// <summary>
+    /// 保存变更。
+    /// </summary>
+    Task SaveChangesAsync(CancellationToken cancellationToken = default);
+}

src/Domain/TakeoutSaaS.Domain/Payments/Enums/PaymentStatus.cs

@@ -0,0 +1,28 @@
+namespace TakeoutSaaS.Domain.Payments.Enums;
+
+/// <summary>
+/// 支付状态。
+/// </summary>
+public enum PaymentStatus
+{
+    /// <summary>
+    /// 未支付。
+    /// </summary>
+    Unpaid = 0,
+    /// <summary>
+    /// 支付中。
+    /// </summary>
+    Paying = 1,
+    /// <summary>
+    /// 已支付。
+    /// </summary>
+    Paid = 2,
+    /// <summary>
+    /// 支付失败。
+    /// </summary>
+    Failed = 3,
+    /// <summary>
+    /// 已退款。
+    /// </summary>
+    Refunded = 4
+}