Add for leave family

apps/sso-core/src/domain/auth-grpc.controller.ts

@@ -912,6 +912,11 @@ export class AuthGrpcController {
     return this.family.leaveFamily(command.requesterId, command.groupId, command.newOwnerUserId);
   }
 
+  @GrpcMethod('FamilyService', 'TransferFamilyOwnership')
+  transferFamilyOwnership(command: { requesterId: string; groupId: string; newOwnerUserId: string }) {
+    return this.family.transferFamilyOwnership(command.requesterId, command.groupId, command.newOwnerUserId);
+  }
+
   @GrpcMethod('FamilyService', 'SendFamilyInvite')
   async sendFamilyInvite(command: { requesterId: string; groupId: string; target?: string; inviteeUserId?: string }) {
     const invite = await this.family.sendInvite(command.requesterId, command.groupId, {

apps/sso-core/src/domain/family.service.ts

@@ -282,6 +282,34 @@ export class FamilyService {
 
   }
 
+  async transferFamilyOwnership(requesterId: string, groupId: string, newOwnerUserId: string) {
+
+    const group = await this.getGroupWithMembers(groupId);
+
+    this.assertOwner(group, requesterId);
+
+    if (newOwnerUserId === requesterId) {
+
+      throw new BadRequestException('Нельзя передать семью самому себе');
+
+    }
+
+    const otherHumans = this.getHumanMembers(group.members).filter((item) => item.userId !== requesterId);
+
+    if (!otherHumans.some((item) => item.userId === newOwnerUserId)) {
+
+      throw new BadRequestException('Новый глава семьи должен быть участником семьи');
+
+    }
+
+    await this.transferOwnership(group, requesterId, newOwnerUserId);
+
+    const updated = await this.getGroupWithMembers(groupId);
+
+    return this.toGroup(updated, requesterId);
+
+  }
+
   private async destroyGroupWithCleanup(group: {
 
     id: string;