69 lines
2.7 KiB
C#
69 lines
2.7 KiB
C#
using MediatR;
|
|
using TakeoutSaaS.Application.App.Tenants.Commands;
|
|
using TakeoutSaaS.Application.App.Tenants.Dto;
|
|
using TakeoutSaaS.Domain.Tenants.Enums;
|
|
using TakeoutSaaS.Domain.Tenants.Repositories;
|
|
using TakeoutSaaS.Shared.Abstractions.Constants;
|
|
using TakeoutSaaS.Shared.Abstractions.Exceptions;
|
|
|
|
namespace TakeoutSaaS.Application.App.Tenants.Handlers;
|
|
|
|
/// <summary>
|
|
/// 更新公告处理器。
|
|
/// </summary>
|
|
public sealed class UpdateTenantAnnouncementCommandHandler(ITenantAnnouncementRepository announcementRepository)
|
|
: IRequestHandler<UpdateTenantAnnouncementCommand, TenantAnnouncementDto?>
|
|
{
|
|
public async Task<TenantAnnouncementDto?> Handle(UpdateTenantAnnouncementCommand request, CancellationToken cancellationToken)
|
|
{
|
|
// 1. 校验输入
|
|
if (string.IsNullOrWhiteSpace(request.Title) || string.IsNullOrWhiteSpace(request.Content))
|
|
{
|
|
throw new BusinessException(ErrorCodes.ValidationFailed, "公告标题和内容不能为空");
|
|
}
|
|
|
|
if (request.RowVersion == null || request.RowVersion.Length == 0)
|
|
{
|
|
throw new BusinessException(ErrorCodes.ValidationFailed, "RowVersion 不能为空");
|
|
}
|
|
|
|
// 2. 查询公告
|
|
var announcement = await announcementRepository.FindByIdAsync(request.TenantId, request.AnnouncementId, cancellationToken);
|
|
if (announcement == null)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
if (announcement.Status != AnnouncementStatus.Draft)
|
|
{
|
|
if (announcement.Status == AnnouncementStatus.Published)
|
|
{
|
|
throw new BusinessException(ErrorCodes.Conflict, "已发布公告不可编辑，要编辑已发布公告，请先撤销");
|
|
}
|
|
|
|
throw new BusinessException(ErrorCodes.Conflict, "仅草稿公告允许编辑");
|
|
}
|
|
|
|
// 3. 更新字段
|
|
announcement.Title = request.Title.Trim();
|
|
announcement.Content = request.Content;
|
|
announcement.TargetType = string.IsNullOrWhiteSpace(request.TargetType) ? announcement.TargetType : request.TargetType.Trim();
|
|
announcement.TargetParameters = request.TargetParameters;
|
|
announcement.RowVersion = request.RowVersion;
|
|
|
|
// 4. 持久化
|
|
try
|
|
{
|
|
await announcementRepository.UpdateAsync(announcement, cancellationToken);
|
|
await announcementRepository.SaveChangesAsync(cancellationToken);
|
|
}
|
|
catch (Exception exception) when (exception.GetType().Name == "DbUpdateConcurrencyException")
|
|
{
|
|
throw new BusinessException(ErrorCodes.Conflict, "公告已被修改，请刷新后重试");
|
|
}
|
|
|
|
// 5. 返回 DTO
|
|
return announcement.ToDto(false, null);
|
|
}
|
|
}
|