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<?php declare(strict_types=1); |
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namespace Getloy; |
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use \Exception; |
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/** |
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* Callback details |
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*/ |
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class CallbackDetails |
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{ |
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/** Payment completed successfully */ |
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const STATUS_SUCCESS = 'successful'; |
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protected $gateway; |
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protected $transactionId; |
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protected $status; |
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protected $amountPaid; |
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protected $currency; |
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/** |
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* Instantiate callback details |
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* |
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* @param Gateway $gateway |
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*/ |
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public function __construct(Gateway $gateway) |
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{ |
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$this->gateway = $gateway; |
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} |
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/** |
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* Parse and validate the body of a callback request. |
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* |
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* @param string $callbackBody Raw callback body. |
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* @throws Exception If the body is invalid. |
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*/ |
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public function parseCallback(string $callbackBody): void |
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{ |
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$callbackData = json_decode($callbackBody, true); |
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if (is_null($callbackData)) { |
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throw new Exception('Malformed callback body!'); |
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} |
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$this->validateCallback($callbackData); |
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} |
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/** |
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* Validate a parsed callback request. |
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* |
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* @param array $callbackBody Parsed callback body. |
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* @throws Exception If the body is invalid. |
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*/ |
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public function validateCallback(array $callbackBody): void |
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{ |
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$valueMap = [ |
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'transactionId' => [ |
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'name' =>'tid', |
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'type' => 'string', |
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], |
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'status' => [ |
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'name' =>'status', |
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'type' => 'string', |
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], |
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'amountPaid' => [ |
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'name' =>'amount_paid', |
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'type' => 'float', |
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], |
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'currency' => [ |
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'name' =>'currency', |
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'type' => 'string', |
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], |
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]; |
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foreach ($valueMap as $def => $callbackKey) { |
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if (!array_key_exists($callbackKey, $callbackBody)) { |
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throw new Exception( |
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sprintf('Callback received without required key "%s"!', $callbackKey) |
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); |
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} |
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$this->setProperty($def['name'], $callbackBody[$callbackKey], $def['type']); |
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} |
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if (!array_key_exists('auth_hash_ext', $callbackBody) |
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|| !$this->validateHash($callbackBody['auth_hash_ext']) |
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) { |
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throw new Exception('Callback hash validation failed!'); |
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} |
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} |
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/** |
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* Validate if the provided hash value matches the instance's callback details. |
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* |
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* @param string $hash The hash value. |
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* @return boolean True if the hash value is valid. |
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*/ |
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protected function validateHash(string $hash): bool |
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{ |
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$hashRecalc = hash_hmac( |
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'sha512', |
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sprintf( |
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'%s|%s|%s|%s|%s', |
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$this->gateway->getloyToken(), |
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$this->transactionId, |
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$this->amountPaid, |
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$this->currency, |
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$this->status |
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), |
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$this->gateway->getloyToken() |
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); |
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return $hash === $hashRecalc; |
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} |
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/** |
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* Convert and set property value. |
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* |
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* @param string $propName |
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* @param string $value |
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* @param string $type |
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*/ |
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protected function setProperty(string $propName, string $value, string $type = 'string') |
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{ |
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switch ($type) { |
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case 'float': |
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$this->$propName = (float) $value; |
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break; |
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default: |
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$this->$propName = $value; |
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} |
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} |
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/** |
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* Getter for transaction ID. |
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* |
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* @return string |
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*/ |
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public function transactionId(): string |
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{ |
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return $this->transactionId; |
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} |
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/** |
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* Getter for transaction status. |
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* |
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* @return string |
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*/ |
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public function status(): string |
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{ |
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return $this->status; |
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} |
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/** |
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* Getter for amount paid. |
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* |
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* @return float |
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*/ |
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public function amountPaid(): float |
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{ |
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return $this->amountPaid; |
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} |
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/** |
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* Getter for transaction currency. |
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* |
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* @return string |
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*/ |
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public function currency(): string |
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{ |
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return $this->currency; |
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} |
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} |
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getloy /
getloy-php
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