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<?php |
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namespace YabaCon\Paystack\Helpers; |
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use \Closure; |
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use \YabaCon\Paystack\Contracts\RouteInterface; |
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/** |
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* Router |
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* Insert description here |
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* |
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* @category |
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* @package |
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* @author |
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* @copyright |
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* @license |
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* @version |
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* @link |
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* @see |
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* @since |
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*/ |
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class Router |
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{ |
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private $route; |
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private $route_class; |
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private $secret_key; |
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private $use_guzzle=false; |
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const ID_KEY = 'id'; |
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const PAYSTACK_API_ROOT = 'https://api.paystack.co'; |
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const HEADER_KEY = 'header'; |
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const BODY_KEY = 'body'; |
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/** |
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* moveArgsToSentargs |
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* Insert description here |
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* |
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* @param $interface |
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* @param $payload |
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* @param $sentargs |
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* |
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* @return |
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* |
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* @access |
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* @static |
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* @see |
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* @since |
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*/ |
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private function moveArgsToSentargs( |
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$interface, |
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&$payload, |
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&$sentargs |
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) { |
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// check if interface supports args |
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if (array_key_exists(RouteInterface:: ARGS_KEY, $interface)) { |
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// to allow args to be specified in the payload, filter them out and put them in sentargs |
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$sentargs = (!$sentargs) ? [ ] : $sentargs; // Make sure $sentargs is not null |
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$args = $interface[RouteInterface::ARGS_KEY]; |
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while (list($key, $value) = each($payload)) { |
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// check that a value was specified |
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// with a key that was expected as an arg |
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if (in_array($key, $args)) { |
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$sentargs[$key] = $value; |
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unset($payload[$key]); |
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} |
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} |
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} |
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} |
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/** |
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* putArgsIntoEndpoint |
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* Insert description here |
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* |
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* @param $endpoint |
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* @param $sentargs |
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* |
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* @return |
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* |
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* @access |
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* @static |
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* @see |
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* @since |
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*/ |
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private function putArgsIntoEndpoint(&$endpoint, $sentargs) |
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{ |
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// substitute sentargs in endpoint |
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while (list($key, $value) = each($sentargs)) { |
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$endpoint = str_replace('{' . $key . '}', $value, $endpoint); |
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} |
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} |
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/** |
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* callViaCurl |
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* Insert description here |
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* |
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* @param $interface |
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* @param $payload |
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* @param $sentargs |
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* |
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* @return |
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* |
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* @access |
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* @static |
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* @see |
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* @since |
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*/ |
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private function callViaCurl($interface, $payload = [ ], $sentargs = [ ]) |
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{ |
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$endpoint = Router::PAYSTACK_API_ROOT . $interface[RouteInterface::ENDPOINT_KEY]; |
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$method = $interface[RouteInterface::METHOD_KEY]; |
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$this->moveArgsToSentargs($interface, $payload, $sentargs); |
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$this->putArgsIntoEndpoint($endpoint, $sentargs); |
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$headers = ["Authorization"=>"Bearer " . $this->secret_key ]; |
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if (($method === RouteInterface::POST_METHOD)|| |
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($method === RouteInterface::PUT_METHOD)) { |
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$headers["Content-Type"] = "application/json"; |
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$body = json_encode($payload); |
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} elseif ($method === RouteInterface::GET_METHOD) { |
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$endpoint = $endpoint . '?' . http_build_query($payload); |
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$body=''; |
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} |
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// Use Guzzle if found, else use Curl |
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if ($this->use_guzzle && class_exists('\\GuzzleHttp\\Client') && class_exists('\\GuzzleHttp\\Psr7\\Request')) { |
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$request = new \GuzzleHttp\Psr7\Request(strtoupper($method), $endpoint, $headers, $body); |
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$client = new \GuzzleHttp\Client(['http_errors' => false]); |
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$response = $client->send($request); |
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return $response; |
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} else { |
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//open connection |
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$ch = \curl_init(); |
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// set url |
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\curl_setopt($ch, \CURLOPT_URL, $endpoint); |
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if ($method === RouteInterface::POST_METHOD || $method === RouteInterface::PUT_METHOD) { |
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($method === RouteInterface:: POST_METHOD) && \curl_setopt($ch, \CURLOPT_POST, true); |
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($method === RouteInterface ::PUT_METHOD) && \curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT"); |
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\curl_setopt($ch, \CURLOPT_POSTFIELDS, $body); |
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} |
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//flatten the headers |
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$flattened_headers = []; |
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while (list($key, $value) = each($headers)) { |
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$flattened_headers[] = $key . ": " . $value; |
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} |
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\curl_setopt($ch, \CURLOPT_HTTPHEADER, $flattened_headers); |
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\curl_setopt($ch, \CURLOPT_RETURNTRANSFER, 1); |
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\curl_setopt($ch, \CURLOPT_HEADER, 1); |
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$response = \curl_exec($ch); |
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// Then, after your \curl_exec call: |
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$header_size = \ curl_getinfo($ch, CURLINFO_HEADER_SIZE); |
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$header = substr($response, 0, $header_size); |
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$header = $this->headers_from_lines(explode("\n", trim($header))); |
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$body = substr($response, $header_size); |
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$body = json_decode($body, true); |
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//close connection |
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\curl_close($ch); |
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return [ |
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Router ::HEADER_KEY => $header, Router::BODY_KEY => $body ]; |
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} |
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} |
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function headers_from_lines($lines) |
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{ |
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$headers = []; |
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foreach ($lines as $line) { |
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$parts = explode(':', $line, 2); |
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$headers[trim($parts[0])][] = isset($parts[1]) |
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? trim($parts[1]) |
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: null; |
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} |
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return $headers; |
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} |
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/** |
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* __call |
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* Insert description here |
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* |
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* @param $methd |
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* @param $sentargs |
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* |
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* @return |
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* |
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* @access |
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* @static |
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* @see |
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* @since |
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*/ |
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public function __call($methd, $sentargs) |
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{ |
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$method = ($methd === 'list' ? 'getList' : $methd ); |
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if (array_key_exists($method, $this->methods) && is_callable($this->methods[$method])) { |
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return call_user_func_array($this->methods[$method], $sentargs); |
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} else { |
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// User attempted to call a function that does not exist |
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throw new \Exception('Function "' . $method . '" does not exist for "' . $this->route . "'."); |
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} |
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} |
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/** |
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* __construct |
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* Insert description here |
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* |
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* @param $route |
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* @param $secret_key |
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* |
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* @return |
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* |
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* @access |
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* @static |
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* @see |
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* @since |
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*/ |
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public function __construct($route, $paystackObj) |
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{ |
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$this->route = strtolower($route); |
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$this->route_class = 'YabaCon\\Paystack\\Routes\\' . ucwords($route); |
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$this->secret_key = $paystackObj->secret_key; |
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$this->use_guzzle = $paystackObj->use_guzzle; |
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$mets = get_class_methods($this->route_class); |
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// add methods to this object per method, except root |
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foreach ($mets as $mtd) { |
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if ($mtd === 'root') { |
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// skip root method |
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continue; |
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} |
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/** |
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* array |
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* Insert description here |
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* |
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* @param $params |
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* @param array |
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* @param $sentargs |
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* |
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* @return |
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* |
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* @access |
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* @static |
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* @see |
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* @since |
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*/ |
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$mtdFunc = function ( |
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array $params = [ ], |
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array $sentargs = [ ] |
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) use ($mtd) { |
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$interface = call_user_func($this->route_class . '::' . $mtd); |
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// TODO: validate params and sentargs against definitions |
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return $this->callViaCurl($interface, $params, $sentargs); |
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}; |
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$this->methods[$mtd] = \Closure::bind($mtdFunc, $this, get_class()); |
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} |
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} |
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} |
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If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: