Как запретить пользователю вступать еще раз ?

<?php
 
class modelTournament extends cmsModel {
 
	public function addTournament($tournament){
 
		return $this->insert('tournaments', $tournament);
 
	}	
 
	public function updateTournament($id, $tournament){
 
		return $this->update('tournaments', $id, $tournament);
 
	}		
 
	public function deleteTournament($id){
 
		return $this->delete('tournaments', $id);
 
	}	
 
	public function getTournament($id){
 
		$tournament = $this->getItemById('tournaments', $id);
 
		$this->filterEqual('tournament_id', $id);
 
		$this->join('cms_users', 'u', 'u.id = i.user_id');
 
		$this->select('u.nickname', 'user_nickname');
 
		$tournament['teams'] = $this->get('team');
 
		return $tournament;
 
	}		
 
	public function getTournaments(){
 
		return $this->get('tournaments');
 
	}
 
	public function getTournamentsCount(){
 
		return $this->getCount('tournaments');
 
	}
 
	public function addTeam($team){
 
		$team_id = $this->insert('team', $team);
 
		$this->filterEqual('id', $team['tournament_id']);
 
		$this->increment('tournaments','users_count');
 
		return $team_id;
 
	}
 
	public function isUserInTournament($user_id, $tournament_id){
 
		$this->filterEqual('user_id', $user_id);
		$this->filterEqual('tournament_id', $tournament_id);
 
		$result = $this->getCount('team');
 
		$this->resetFilters();
 
		return $result;
 
	}	
 
		public function setTournamentStatus($tournament_id, $status){
 
		return $this->update('tournaments', $tournament_id, array(
			'status' => $status
		));
 
	}
 
		public function getTeam($id){
 
		return $this->getItemById('team', $id);
	}
 
		public function deleteTeam($id){
 
		$config = cmsConfig::getInstance();
 
		$team = $this->getTeam($id);
 
		$this->delete('team', $id);
 
		$this->filterEqual('id', $team['tournament_id']);		
		$this->decrement('tournaments', 'users_count');
 
		$tournament = $this->getTournament($team['tournament_id']);
 
		if ($tournament['status'] == tournament::STATUS_MODERATION){
			if ($tournament['users_count'] < $tournament['min_users']){
				$this->setTournamentStatus($tournament['id'], tournament::STATUS_PENDING);
			}
		}
 
	}
 
}

 
 
<?php
 
class actionTournamentJoin extends cmsAction {
 
	public function run($tournament_id){
 
		if (!$tournament_id) { cmsCore::error404(); }
 
		$tournament = $this->model->getTournament($tournament_id);
 
		if (!$tournament || $tournament['status'] != tournament::STATUS_PENDING) { 
			cmsCore::error404();
		}
		if(cmsUser::get('tournament_id')){
        cmsUser::addSessionMessage('Вы уже в команде', 'error');
        $this->redirectBack();
		}
 
		$user = cmsUser::getInstance();
		$is_user_in_tournament = $user->is_admin ? false : $is_max;
 
		if ($is_user_in_tournament){
			cmsCore::error404();
		}
 
		$errors = false;
 
		$form = $this->getForm('join');
 
		$is_submitted = $this->request->has('submit');
 
		$team = $form->parse($this->request, $is_submitted);
 
		$user = cmsUser::getInstance();
 
 
		if ($is_submitted){
 
			$errors = $form->validate($this, $team);
 
			if (!$errors){
 
				$team['tournament_id'] = $tournament_id;
				$team['user_id'] = $user->id;
				$this->model->addTeam($team);	
 
				$tournament = $this->model->getTournament($tournament_id);
 
				if ($tournament['users_count'] >= $tournament['min_users']){
 
					$this->model->setTournamentStatus($tournament_id, tournament::STATUS_MODERATION);
 
 
				}
 
 
				$this->redirectToAction('event', array($tournament_id));	
			}
 
			if ($errors){
				cmsUser::addSessionMessage(LANG_FORM_ERRORS, 'error');
			}
 
		}
 
		$template = cmsTemplate::getInstance();
 
		$template->render('form_join', array(
			'form' => $form,
			'errors' => $errors,
			'team' => $team,
			'tournament' => $tournament
		));
 
	}
 
}
 

 

                                        

                                            

                                                                                        

        

                    
                            
            

    

                    
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