Yabacon\Paystack\Helpers\Caller

Complexity

Total Complexity

41

Size/Duplication

Total Lines	146
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	3

Test Coverage

Coverage

22.58%

Importance

Changes	1
Bugs	0	Features	0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	1
B	moveArgsToSentargs()	0	20	5
A	putArgsIntoEndpoint()	0	7	2
D	attemptGuzzle()	0	34	18
B	callEndpoint()	0	26	5
D	attemptCurl()	0	43	10

<?php

namespace Yabacon\Paystack\Helpers;

use \Closure;
use \Yabacon\Paystack\Contracts\RouteInterface;

class Caller
{
    private $use_guzzle=false;
    private $secret_key;

    public function __construct($paystackObj)
    {
        $this->secret_key = $paystackObj->secret_key;
        $this->use_guzzle = $paystackObj->use_guzzle;
    }

    public function moveArgsToSentargs(
        $interface,
        &$payload,
        &$sentargs
    ) {
        // check if interface supports args
        if (array_key_exists(RouteInterface:: ARGS_KEY, $interface)) {
            // to allow args to be specified in the payload, filter them out and put them in sentargs
            $sentargs = (!$sentargs) ? [ ] : $sentargs; // Make sure $sentargs is not null
            $args = $interface[RouteInterface::ARGS_KEY];
            while (list($key, $value) = each($payload)) {
                // check that a value was specified
                // with a key that was expected as an arg
                if (in_array($key, $args)) {
                    $sentargs[$key] = $value;
                    unset($payload[$key]);
                }
            }
        }
    }

    public function putArgsIntoEndpoint(&$endpoint, $sentargs)
    {
        // substitute sentargs in endpoint
        while (list($key, $value) = each($sentargs)) {
            $endpoint = str_replace('{' . $key . '}', $value, $endpoint);
        }
    }
    
    private function attemptGuzzle($method, $endpoint, $headers, $body)
    {
        if ($this->use_guzzle 
            && class_exists('\\GuzzleHttp\\Exception\\BadResponseException') 
            && class_exists('\\GuzzleHttp\\Exception\\ClientException') 
            && class_exists('\\GuzzleHttp\\Exception\\ConnectException') 
            && class_exists('\\GuzzleHttp\\Exception\\RequestException') 
            && class_exists('\\GuzzleHttp\\Exception\\ServerException') 
            && class_exists('\\GuzzleHttp\\Exception\\TooManyRedirectsException') 
            && class_exists('\\GuzzleHttp\\Client') 
            && class_exists('\\GuzzleHttp\\Psr7\\Request')
        ) {
            $request = new \GuzzleHttp\Psr7\Request(strtoupper($method), $endpoint, $headers, $body);
            $client = new \GuzzleHttp\Client();
            try {
                $response = $client->send($request);
            } catch (\Exception $e) {
                if (($e instanceof \GuzzleHttp\Exception\BadResponseException
                    || $e instanceof \GuzzleHttp\Exception\ClientException
                    || $e instanceof \GuzzleHttp\Exception\ConnectException
                    || $e instanceof \GuzzleHttp\Exception\RequestException
                    || $e instanceof \GuzzleHttp\Exception\ServerException
                    || $e instanceof \GuzzleHttp\Exception\TooManyRedirectsException) && $e->hasResponse()
                ) {
                    $response = $e->getResponse();
                } else {
                    throw $e;
                }
            }
            return $response;
        } else {
            return false;
        }
    }

    public function callEndpoint($interface, $payload = [ ], $sentargs = [ ])
    {
        $endpoint = Router::PAYSTACK_API_ROOT . $interface[RouteInterface::ENDPOINT_KEY];
        $method = $interface[RouteInterface::METHOD_KEY];

        $this->moveArgsToSentargs($interface, $payload, $sentargs);
        $this->putArgsIntoEndpoint($endpoint, $sentargs);
 
        $headers = ["Authorization"=>"Bearer " . $this->secret_key ];
        $body = '';
        if (($method === RouteInterface::POST_METHOD)
            || ($method === RouteInterface::PUT_METHOD)
        ) {
            $headers["Content-Type"] = "application/json";
            $body = json_encode($payload);
        } elseif ($method === RouteInterface::GET_METHOD) {
            $endpoint = $endpoint . '?' . http_build_query($payload);
        }
        // Use Guzzle if found, else use Curl
        $guzzleResponse = $this->attemptGuzzle($method, $endpoint, $headers, $body);
        if ($guzzleResponse !== false) {
            return $guzzleResponse;
        }
        
        return $this->attemptCurl($method, $endpoint, $headers, $body);
    }

    private function attemptCurl($method, $endpoint, $headers, $body)
    {
        //open connection
        $ch = \curl_init();
        \curl_setopt($ch, \CURLOPT_URL, $endpoint);

        if ($method === RouteInterface::POST_METHOD || $method === RouteInterface::PUT_METHOD) {
            ($method === RouteInterface:: POST_METHOD) && \curl_setopt($ch, \CURLOPT_POST, true);
            ($method === RouteInterface ::PUT_METHOD) && \curl_setopt($ch, \CURLOPT_CUSTOMREQUEST, "PUT");

            \curl_setopt($ch, \CURLOPT_POSTFIELDS, $body);
        }
        //flatten the headers
        $flattened_headers = [];
        while (list($key, $value) = each($headers)) {
            $flattened_headers[] = $key . ": " . $value;
        }
        \curl_setopt($ch, \CURLOPT_HTTPHEADER, $flattened_headers);
        \curl_setopt($ch, \CURLOPT_RETURNTRANSFER, 1);
        \curl_setopt($ch, \CURLOPT_SSLVERSION, 6);

        $response = \curl_exec($ch);
        
        if (\curl_errno($ch)) {   // should be 0
            // curl ended with an error
            $cerr = \curl_error($ch);
            \curl_close($ch);
            throw new \Exception("Curl failed with response: '" . $cerr . "'.");
        }

        // Decode JSON from Paystack:
        $resp = \json_decode($response);
        \curl_close($ch);

        if (json_last_error() !== JSON_ERROR_NONE || !$resp->status) {
            throw new \Exception(
                "Paystack Request failed with response: '" .
                ((json_last_error() === JSON_ERROR_NONE) ? $resp->message : $response) . "'."
            );
        }

        return $resp;
    }
}