ref: project structure

application/Permissions/Commands/CreateRole.cs

@@ -0,0 +1,40 @@
+using AutoMapper;
+using MediatR;
+using mws.backend.dotnet.application.Common;
+using mws.backend.dotnet.domain.Roles;
+
+namespace mws.backend.dotnet.application.Permissions;
+
+public record CreateRoleCommand(SaveRoleRequest Request) : IRequest<RoleDto>;
+
+public class CreateRoleHandler(IUnitOfWork uow, IMapper mapper) : IRequestHandler<CreateRoleCommand, RoleDto>
+{
+    public async Task<RoleDto> Handle(CreateRoleCommand command, CancellationToken ct)
+    {
+        var name = command.Request.Name.Trim();
+        if (string.IsNullOrWhiteSpace(name))
+        {
+            throw new BadRequestException("Role name is required");
+        }
+
+        if (await uow.Roles.ExistsByNameAsync(name, null, ct))
+        {
+            throw new BadRequestException("Role name already exists");
+        }
+
+        var now = DateTime.UtcNow;
+        var role = new Role
+        {
+            Id = Guid.NewGuid(),
+            Name = name,
+            IsSystem = false,
+            CreatedAt = now,
+            UpdatedAt = now,
+            Permissions = RolePermissionBuilder.Build(command.Request.Permissions),
+        };
+
+        uow.Roles.Add(role);
+        await uow.SaveChangesAsync(ct);
+        return mapper.Map<RoleDto>(role);
+    }
+}