SDLC_WMS/Server/Wms.Core.Domain.Task/CommandHandlers/BypassCommandHandler.cs

using AutoMapper;
using Kean.Domain.Task.Commands;
using Kean.Domain.Task.Enums;
using Kean.Domain.Task.Events;
using Kean.Domain.Task.Models;
using Kean.Domain.Task.Repositories;
using Kean.Domain.Task.SharedServices.Proxies;
using Kean.Infrastructure.Configuration;
using System;
using System.Linq;
using System.Threading;

namespace Kean.Domain.Task.CommandHandlers
{
    /// <summary>
    /// 创建输送命令处理程序
    /// </summary>
    public sealed class BypassCommandHandler : CommandHandler<BypassCommand>
    {
        private readonly ICommandBus _commandBus; // 命令总线
        private readonly INotification _notifications; // 总线通知
        private readonly IMapper _mapper; // 模型映射
        private readonly ITaskRepository _taskRepository; // 任务仓库
        private readonly IWarehouseRepository _warehouseRepository; // 库房仓库
        private readonly BarcodeInterpreter _barcodeInterpreter; // 条码解释器
        private readonly BarcodeValidator _barcodeValidator; // 条码验证器
        private readonly StockProxy _stockProxy; // 仓储域代理

        /// <summary>
        /// 依赖注入
        /// </summary>
        public BypassCommandHandler(
            ICommandBus commandBus,
            INotification notifications,
            IMapper mapper,
            ITaskRepository taskRepository,
            IWarehouseRepository warehouseRepository,
            BarcodeInterpreter barcodeInterpreter,
            BarcodeValidator barcodeValidator,
            StockProxy stockProxy)
        {
            _commandBus = commandBus;
            _notifications = notifications;
            _mapper = mapper;
            _taskRepository = taskRepository;
            _warehouseRepository = warehouseRepository;
            _barcodeInterpreter = barcodeInterpreter;
            _barcodeValidator = barcodeValidator;
            _stockProxy = stockProxy;
        }

        /// <summary>
        /// 处理程序
        /// </summary>
        public override async System.Threading.Tasks.Task Handle(BypassCommand command, CancellationToken cancellationToken)
        {
            if (command.ValidationResult.IsValid)
            {
                // 条码格式校验
                if (!await _barcodeValidator.Validate(command.Barcode))
                {
                    await _commandBus.Notify(nameof(command.Barcode), "条码格式不正确", command.Barcode,
                            cancellationToken: cancellationToken);
                    return;
                }
                // 任务重复
                if (await _taskRepository.HasTask(command.Barcode))
                {
                    await _commandBus.Notify(nameof(command.Barcode), "托盘正在执行任务", command.Barcode,
                            cancellationToken: cancellationToken);
                    return;
                }
                var pallet = await _barcodeInterpreter.Interpret(command.Barcode);
                // 不允许操作立库中的库存
                var cell = await _stockProxy.GetCell(command.Barcode);
                if (cell.HasValue && await _warehouseRepository.IsCell(cell.Value) == true)
                {
                    await _commandBus.Notify(nameof(command.Barcode), "不允许操作立库中的库存", command.Barcode,
                            cancellationToken: cancellationToken);
                    return;
                }
                // 获取操作位置
                var original = command.Original switch
                {
                    int i => await _warehouseRepository.GetStationById(i),
                    long i => await _warehouseRepository.GetStationById((int)i),
                    string s when s.StartsWith("name:") => await _warehouseRepository.GetStationByName(s[5..], command.Warehouse),
                    string s when s.StartsWith("device:") => await _warehouseRepository.GetStationByDevice(s[7..], command.Warehouse),
                    Station s => s,
                    _ => null
                };
                // 操作位置可用性
                if (original?.Warehouse != command.Warehouse
                    || original.AllowIn != true
                    || original.Pallet?.Contains(pallet) == false
                    || original.Spec?.Adaptive(command.Spec) == false)
                {
                    await _commandBus.Notify(nameof(command.Original), "操作位置不正确", command.Original,
                            cancellationToken: cancellationToken);
                    return;
                }
                // 获取目标位置
                var destination = command.Destination switch
                {
                    int i => await _warehouseRepository.GetStationById(i),
                    long i => await _warehouseRepository.GetStationById((int)i),
                    string s when s.StartsWith("name:") => await _warehouseRepository.GetStationByName(s[5..], command.Warehouse),
                    string s when s.StartsWith("device:") => await _warehouseRepository.GetStationByDevice(s[7..], command.Warehouse),
                    Station s => s,
                    _ => null
                };
                // 目标位置可用性
                if (destination?.Warehouse != command.Warehouse
                    || destination.AllowOut != true
                    || destination.Pallet?.Contains(pallet) == false
                    || destination.Spec?.Adaptive(command.Spec) == false)
                {
                    await _commandBus.Notify(nameof(command.Destination), "目标位置不正确", command.Destination,
                        cancellationToken: cancellationToken);
                    return;
                }
                // 时间戳
                command.Timestamp ??= DateTime.Now;
                // 切点事件
                var event0 = _mapper.Map<BypassExecutingEvent>(command);
                event0.Original = original;
                event0.Destination = destination;
                await _commandBus.Trigger(event0, cancellationToken);
                if (!_notifications.Any())
                {
                    // 创建任务
                    var task = _mapper.Map<Models.Task>(command);
                    task.Type = TaskType.Bypass;
                    task.Original = original.Id;
                    task.Destination = destination.Id;
                    Output(nameof(command.Id), await _taskRepository.CreateTask(task));
                    // 成功事件
                    var event1 = _mapper.Map<BypassSuccessEvent>(command);
                    event1.Original = original;
                    event1.Destination = destination;
                    await _commandBus.Trigger(event1, cancellationToken);
                    // 手动
                    if (command.Manual && !_notifications.Any())
                    {
                        await _commandBus.Execute(new CompleteCommand { Id = command.Id }, cancellationToken);
                    }
                }
            }
            else
            {
                await _commandBus.Notify(command.ValidationResult,
                    cancellationToken: cancellationToken);
            }
        }
    }
}