feat: 增加角色/权限管理 API 与应用层命令

src/Application/TakeoutSaaS.Application/Identity/Handlers/DeleteRoleCommandHandler.cs

@@ -0,0 +1,23 @@
+using MediatR;
+using TakeoutSaaS.Application.Identity.Commands;
+using TakeoutSaaS.Domain.Identity.Repositories;
+using TakeoutSaaS.Shared.Abstractions.Tenancy;
+
+namespace TakeoutSaaS.Application.Identity.Handlers;
+
+/// <summary>
+/// 删除角色处理器。
+/// </summary>
+public sealed class DeleteRoleCommandHandler(
+    IRoleRepository roleRepository,
+    ITenantProvider tenantProvider)
+    : IRequestHandler<DeleteRoleCommand, bool>
+{
+    public async Task<bool> Handle(DeleteRoleCommand request, CancellationToken cancellationToken)
+    {
+        var tenantId = tenantProvider.GetCurrentTenantId();
+        await roleRepository.DeleteAsync(request.RoleId, tenantId, cancellationToken);
+        await roleRepository.SaveChangesAsync(cancellationToken);
+        return true;
+    }
+}