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<?php |
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namespace Samerior\MobileMoney\Mpesa\Library; |
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use Samerior\MobileMoney\Mpesa\Exceptions\MpesaException; |
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use GuzzleHttp\Exception\RequestException; |
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use Illuminate\Support\Facades\Cache; |
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use Psr\Http\Message\ResponseInterface; |
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use Samerior\MobileMoney\Mpesa\Repositories\EndpointsRepository; |
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/** |
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* Class Authenticator |
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* |
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* @package Samerior\MobileMoney\Mpesa\Library |
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*/ |
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class Authenticator |
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{ |
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/** |
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* @var string |
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*/ |
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protected $endpoint; |
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/** |
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* @var Core |
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*/ |
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protected $engine; |
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/** |
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* @var Authenticator |
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*/ |
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protected static $instance; |
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/** |
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* @var bool |
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*/ |
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public $alt = false; |
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/** |
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* @var string |
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*/ |
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private $credentials; |
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/** |
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* Authenticator constructor. |
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* |
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* @param Core $core |
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* @throws MpesaException |
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*/ |
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public function __construct(Core $core) |
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{ |
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$this->engine = $core; |
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$this->endpoint = EndpointsRepository::build('auth'); |
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self::$instance = $this; |
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} |
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/** |
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* @param bool $bulk |
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* @return string |
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* @throws MpesaException |
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* @throws \GuzzleHttp\Exception\GuzzleException |
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*/ |
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public function authenticate($bulk = false): ?string |
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{ |
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if ($bulk) { |
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$this->alt = true; |
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} |
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$this->generateCredentials(); |
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if (config('samerior.mpesa.cache_credentials', false) && !empty($key = $this->getFromCache())) { |
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return $key; |
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} |
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try { |
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$response = $this->makeRequest(); |
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if ($response->getStatusCode() === 200) { |
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$body = \json_decode($response->getBody()); |
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$this->saveCredentials($body); |
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return $body->access_token; |
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} |
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throw new MpesaException($response->getReasonPhrase()); |
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} catch (RequestException $exception) { |
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$message = $exception->getResponse() ? |
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$exception->getResponse()->getReasonPhrase() : |
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$exception->getMessage(); |
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throw $this->generateException($message); |
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} |
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} |
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/** |
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* @param $reason |
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* @return MpesaException |
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*/ |
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private function generateException($reason): ?MpesaException |
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{ |
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switch (\strtolower($reason)) { |
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case 'bad request: invalid credentials': |
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return new MpesaException('Invalid consumer key and secret combination'); |
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default: |
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return new MpesaException($reason); |
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} |
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} |
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/** |
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* @return $this |
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*/ |
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private function generateCredentials(): self |
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{ |
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$key = \config('samerior.mpesa.c2b.consumer_key'); |
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$secret = \config('samerior.mpesa.c2b.consumer_secret'); |
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if ($this->alt) { |
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//lazy way to switch to a different app in case of bulk |
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$key = \config('samerior.mpesa.b2c.consumer_key'); |
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$secret = \config('samerior.mpesa.b2c.consumer_secret'); |
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} |
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$this->credentials = \base64_encode($key . ':' . $secret); |
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return $this; |
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} |
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/** |
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* @return ResponseInterface |
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* @throws \GuzzleHttp\Exception\GuzzleException |
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*/ |
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private function makeRequest(): ResponseInterface |
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{ |
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return $this->engine->client->request( |
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'GET', |
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$this->endpoint, |
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[ |
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'headers' => [ |
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'Authorization' => 'Basic ' . $this->credentials, |
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'Content-Type' => 'application/json', |
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], |
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] |
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); |
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} |
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/** |
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* @return mixed |
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*/ |
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private function getFromCache() |
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{ |
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return Cache::get($this->credentials); |
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} |
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/** |
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* Store the credentials in the cache. |
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* |
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* @param $credentials |
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*/ |
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private function saveCredentials($credentials) |
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{ |
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Cache::put($this->credentials, $credentials->access_token, 30); |
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} |
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} |
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samerior /
mobile-money
