v3-api/src/chat-attachments/attachment-session-expert.guard.ts

import {
  CanActivate,
  ExecutionContext,
  Injectable,
  UnauthorizedException,
} from '@nestjs/common';
import { ChatService } from 'src/socket/support-management/chat.service';

@Injectable()
export class AttachmentSessionExpertGuard implements CanActivate {
  constructor(private readonly chatService: ChatService) {}

  async canActivate(context: ExecutionContext): Promise<boolean> {
    const req = context.switchToHttp().getRequest();
    const sessionId = req.params?.sessionId as string;
    const admin = req.admin;
    if (!admin?._id) {
      throw new UnauthorizedException('expert_token_required');
    }
    await this.chatService.assertParticipantCanUploadVoice(
      sessionId,
      String(admin._id),
      'Expert',
    );
    return true;
  }
}