yfix/yf

<?php

class Privat24
{
    protected $_currency_allow = ['EUR', 'UAH', 'USD'];
    protected $_signature_allow = [
        'amt',         // amount
        'ccy',         // currency
        'details',
        'ext_details',
        'pay_way',     // privat24
        'order',       // order_id
        'merchant',
        // 'return_url',
        // 'server_url',
    ];
    protected $_key_public = null;
    protected $_key_private = null;

    public function __construct($key_public, $key_private)
    {
        if (empty($key_public)) {
            throw new InvalidArgumentException('key_public (merchant) is empty');
        }
        if (empty($key_private)) {
            throw new InvalidArgumentException('key_private is empty');
        }
        $this->_key_public = $key_public;
        $this->_key_private = $key_private;
    }

    public function key($name = 'public', $value = null)
    {
        if ( ! in_array($name, ['public', 'private'])) {
            return  null;
        }
        $_name = '_key_' . $name;
        $_value = &$this->{ $_name };
        // set
        if ( ! empty($value) && is_string($value)) {
            $_value = $value;
        }
        // get
        return  $_value;
    }

    public function signature($options, $is_request = true)
    {
        $_ = &$options;
        if ($is_request) {
            $request = [];
            foreach ((array) $this->_signature_allow as $key) {
                $request[] = $key . '=' . $_[$key];
            }
            $request = implode('&', $request);
            $_ = $request;
        }
        $result = $this->str_to_sign($_);
        return  $result;
    }

    public function str_to_sign($str)
    {
        $signature = sha1(md5($str . $this->_key_private));
        return  $signature;
    }
}