pgeN5AhN

1<?php
2
3class UnitPay
4{
5    private $event;
6
7    public function __construct(UnitPayEvent $event)
8    {
9        $this->event = $event;
10    }
11
12    public function getResult()
13    {
14        $request = $_GET;
15
16        if (empty($request['method'])
17            || empty($request['params'])
18            || !is_array($request['params'])
19        )
20        {
21            return $this->getResponseError('Invalid request');
22        }
23
24        $method = $request['method'];
25        $params = $request['params'];
26
27        if ($params['signature'] != $this->getSha256SignatureByMethodAndParams($method, $params, Config::SECRET_KEY))
28        {
29            return $this->getResponseError('Incorrect digital signature');
30        }
31
32        $unitPayModel = UnitPayModel::getInstance();
33
34        if ($method == 'check')
35        {
36            if ($unitPayModel->getPaymentByUnitpayId($params['unitpayId']))
37            {
38                // Платеж уже существует
39                return $this->getResponseSuccess('Payment already exists');
40            }
41
42            $itemsCount = floor($params['sum'] / Config::ITEM_PRICE);
43
44            if ($itemsCount <= 0)
45            {
46                return $this->getResponseError('Суммы ' . $params['sum'] . ' руб. не достаточно для оплаты товара ' .
47                    'стоимостью ' . Config::ITEM_PRICE . ' руб.');
48            }
49
50            if (!$unitPayModel->createPayment(
51                $params['unitpayId'],
52                $params['account'],
53                $params['sum'],
54                $itemsCount
55            ))
56            {
57                return $this->getResponseError('Unable to create payment database');
58            }
59
60            $checkResult = $this->event->check($params);
61            if ($checkResult !== true)
62            {
63                return $this->getResponseError($checkResult);
64            }
65
66            return $this->getResponseSuccess('CHECK is successful');
67        }
68
69        if ($method == 'pay')
70        {
71            $payment = $unitPayModel->getPaymentByUnitpayId(
72                $params['unitpayId']
73            );
74
75            if ($payment && $payment->status == 1)
76            {
77                return $this->getResponseSuccess('Payment has already been paid');
78            }
79
80            if (!$unitPayModel->confirmPaymentByUnitpayId($params['unitpayId']))
81            {
82                return $this->getResponseError('Unable to confirm payment database');
83            }
84
85            $this->event
86                ->pay($params);
87
88            return $this->getResponseSuccess('PAY is successful');
89        }
90
91	return $this->getResponseError($method.' not supported');
92    }
93
94    private function getResponseSuccess($message)
95    {
96        return json_encode(
97            array(
98                'result' => array(
99                    'message' => $message
100                )
101            )
102        );
103    }
104
105    private function getResponseError($message)
106    {
107        return json_encode(
108            array(
109                'error' => array(
110                    'message' => $message
111                )
112            )
113        );
114    }
115
116    /**
117     * @param       $method
118     * @param array $params
119     * @param       $secretKey
120     *
121     * @return string
122     */
123    private function getSha256SignatureByMethodAndParams($method, array $params, $secretKey)
124    {
125        ksort($params);
126        unset($params['sign']);
127        unset($params['signature']);
128        array_push($params, $secretKey);
129        array_unshift($params, $method);
130
131        return hash('sha256', join('{up}', $params));
132    }
133}