library-ts/node/users/requirements/user/UserIsLoggedIn.ts

import { FastifyRequest, FastifyReply } from 'fastify';
import { RequestRequirement } from '../RequestRequirement';
import { Message } from '../../../../browser/messages/Message';

export class UserIsLoggedIn extends RequestRequirement
{

  async handle( request:FastifyRequest, reply:FastifyReply ):Promise<Message[]>
  {
    let requestBody = request.body;
    let tokenData = requestBody as { token:string };

    if ( ! tokenData )
    {
      return Promise.resolve( [ Message.Error( "No token data" )] );
    }

    let tokenID = tokenData.token;

    let session = this._handler._ums._sessions.get( tokenID );

    if ( ! session )
    {
      return Promise.resolve( [ Message.Error( "No session for token:" + tokenID )] );
    }

    let token = this._handler._ums.tokenDB._tokens.get( tokenID );

    let isValid = await this._handler._ums.tokenDB.validate( token, request.ip );

    if ( ! isValid )
    {
      return Promise.resolve( [ Message.Error( "Invalid token"  + tokenID )] );
    }

    return Promise.resolve( [] );  
  }
}