competitionvalidation.php

<?php
class Competition_Validation extends Validation {
    protected $competition;
    protected $guess;

    public function init(){
        $this->add_rule( 'name' , 'required' );
        $this->add_rule( 'email' , 'required' );
        $this->add_rule( 'email' , 'email' );
        $this->add_rule( 'answer' , array( $this , 'valid_competition' ) );
        $this->add_rule( 'email' , array( $this , 'ip_cant_enter' ) );
    }

    public function valid_competition( Validation $v , $field ){
        $this->competition = Competitions::factory( $this->d() )->get_latest_live();
        if ( !$this->competition->loaded() ) return false;

        foreach ( $this->competition->answers() as $answer ) {
            if ( (int) $answer['id'] === (int) $v->$field ) $this->guess = $answer;
        }
        return $this->guess ? true : false;
    }
    
    public function ip_cant_enter( Validation $v , $field ){
        if ( !$this->competition ) return false;
        $entries = $this->d()
            ->db
            ->query('select count(*) c
            from competitionGuesses
            where ip = :ip and competitionId = :competitionid' , array(
                'ip'            => $_SERVER['REMOTE_ADDR'],
                'competitionid' => $this->competition->id
            ))
            ->shift();
        return $entries['c'] > 0 ? false : true;
    }
}
?>