wip league admin tools

core/racing/application/use-cases/UpdateLeagueMemberRoleUseCase.ts

@@ -3,6 +3,7 @@ import type { UseCaseOutputPort } from '@core/shared/application';
 import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
 import type { ILeagueMembershipRepository } from '../../domain/repositories/ILeagueMembershipRepository';
 import { LeagueMembership } from '../../domain/entities/LeagueMembership';
+import type { MembershipRoleValue } from '../../domain/entities/MembershipRole';
 
 export type UpdateLeagueMemberRoleInput = {
   leagueId: string;
@@ -16,6 +17,8 @@ export type UpdateLeagueMemberRoleResult = {
 
 export type UpdateLeagueMemberRoleErrorCode =
   | 'MEMBERSHIP_NOT_FOUND'
+  | 'INVALID_ROLE'
+  | 'CANNOT_DOWNGRADE_LAST_OWNER'
   | 'REPOSITORY_ERROR';
 
 export class UpdateLeagueMemberRoleUseCase {
@@ -40,11 +43,31 @@ export class UpdateLeagueMemberRoleUseCase {
         });
       }
 
+      const allowedRoles: MembershipRoleValue[] = ['owner', 'admin', 'steward', 'member'];
+      const requestedRole = input.newRole as MembershipRoleValue;
+
+      if (!allowedRoles.includes(requestedRole)) {
+        return Result.err({
+          code: 'INVALID_ROLE',
+          details: { message: 'Invalid membership role' },
+        });
+      }
+
+      const ownerCount = memberships.filter(m => m.role.toString() === 'owner').length;
+      const isTargetOwner = membership.role.toString() === 'owner';
+
+      if (isTargetOwner && requestedRole !== 'owner' && ownerCount <= 1) {
+        return Result.err({
+          code: 'CANNOT_DOWNGRADE_LAST_OWNER',
+          details: { message: 'Cannot downgrade the last owner' },
+        });
+      }
+
       const updatedMembership = LeagueMembership.create({
         id: membership.id,
         leagueId: membership.leagueId.toString(),
         driverId: membership.driverId.toString(),
-        role: input.newRole,
+        role: requestedRole,
         status: membership.status.toString(),
         joinedAt: membership.joinedAt.toDate(),
       });