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

export class UserCanUseApp extends RequestRequirement
{

  async handle( request:FastifyRequest, reply:FastifyReply ):Promise<Message[]>
  {
    let requestBody = request.body;
    let appData = requestBody as { token:string, appID:string };
    
    if ( ! appData )
    {
      return this.sendError( "No token data" );
    }

    if ( this.ums._settings.userApps.indexOf( appData.appID ) == -1 )
    {
      return this.sendError( "Invalid app id: " + appData.appID + ". Defined apps:" + this.ums._settings.userApps.join( ", " )  ); 
    }
    
    let user = await this.ums.getUser( request );

    let appPermissionID = "apps." + appData.appID; 

    let hasPermission = await this.ums.userDB.hasPermission( user, appPermissionID );

    if ( ! hasPermission )
    {
      return this.sendError( "Permission for app not found" );
    }

    return this.giveOK();
  }
}