<?php


namespace Kedrigern\Price;
 
header('Content-Type: text/html; charset=utf-8');

class PriceEntity {
    private $acceptable = array(
        "CZK", "EUR", "USD"
    );
    private $amount;

    public function __construct(){
        foreach($this->acceptable as $key => $row){
            $this->amount[$row] = 0;
        }
    }


    public function setAmount($amount, $type){
        if(in_array($type, $this->acceptable)){
            $this->amount[$type] += (double)$amount;
        }        
    }


}

abstract class Currency {

    public static function convert()
    {
        echo "Něco s tím prověď něbo se zblázním :)";
    }
}

class Price extends Currency {
    protected $priceEntity;

    protected function createPriceEntity(){
        if(!$this->priceEntity){
            $this->priceEntity = new PriceEntity();
        }        
    }

    public function add($amount, $type = "CZK"){
        
        $this->createPriceEntity();
        $this->priceEntity->setAmount($amount,$type);

    }
}

$currency = new Price();
$currency->add(3000,"USD");
$currency->add(2000,"CZK");
$prices = $currency->convert();