yfix/yf

<?php

// https://ecommpay.com/

class EcommPay
{
    private $_key_public = null;
    private $_key_private = null;

    private $options_level_max = 2;

    public function __construct($key_public, $key_private)
    {
        if (empty($key_public)) {
            throw new InvalidArgumentException('key_public (site_id) is empty');
        }
        if (empty($key_private)) {
            throw new InvalidArgumentException('key_private (salt) 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', 'private_test'])) {
            return  null;
        }
        $_name = '_key_' . $name;
        $_value = &$this->{ $_name };
        // set
        if ( ! empty($value) && is_string($value)) {
            $_value = $value;
        }
        // get
        return  $_value;
    }

    public function options_to_str(array $options, $is_request = true, $level = 1)
    {
        if ($level > $this->options_level_max) {
            return  null;
        }
        $result = [];
        ksort($options);
        foreach ($options as $key => $value) {
            $_value = null;
            switch (true) {
                case is_bool($value):
                    $_value = $value ? '1' : '0';
                    break;
                case is_scalar($value) && ! is_resource($value) && $value !== '':
                    $_value = (string) $value;
                    break;
                case is_array($value):
                    $_value = $this->options_to_str($value, $is_request, $level + 1);
                    break;
                default:
                    continue 2;
            }
            if ($_value === null) {
                continue;
            }
            if ($is_request) {
                $_value = $key . ':' . $_value;
            } else {
                $_value = $_value;
            }
            $result[$key] = $_value;
        }
        if ($is_request) {
            $separator = ';';
        } else {
            $separator = '';
        }
        $result = implode($separator, $result);
        return  $result;
    }

    public function signature(array $options, $is_request = true)
    {
        $_ = $options;
        $request = [];
        // compile string
        unset($_['signature'], $_['sign']);
        $str = $this->options_to_str($_, $is_request);
        // add salt
        $key = $this->_key_private;
        if ($is_request) {
            $separator = ';';
        } else {
            $separator = '';
        }
        $str = $str . $separator . $key;
        // create signature
        $result = $this->str_to_sign($str);
        // DEBUG
        // var_dump( $options, $str, $result );
        return  $result;
    }

    public function str_to_sign($str)
    {
        $result = sha1($str);
        return  $result;
    }
}