<?php declare(strict_types=1);
/*
 * This file is part of phpunit/php-file-iterator.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace SebastianBergmann\FileIterator;

use function array_filter;
use function array_map;
use function preg_match;
use function realpath;
use function str_replace;
use function strlen;
use function strpos;
use function substr;
use FilterIterator;

class Iterator extends FilterIterator
{
    public const PREFIX = 0;

    public const SUFFIX = 1;

    /**
     * @var string
     */
    private $basePath;

    /**
     * @var array
     */
    private $suffixes = [];

    /**
     * @var array
     */
    private $prefixes = [];

    /**
     * @var array
     */
    private $exclude = [];

    public function __construct(string $basePath, \Iterator $iterator, array $suffixes = [], array $prefixes = [], array $exclude = [])
    {
        $this->basePath = realpath($basePath);
        $this->prefixes = $prefixes;
        $this->suffixes = $suffixes;
        $this->exclude  = array_filter(array_map('realpath', $exclude));

        parent::__construct($iterator);
    }

    public function accept(): bool
    {
        $current  = $this->getInnerIterator()->current();
        $filename = $current->getFilename();
        $realPath = $current->getRealPath();

        if ($realPath === false) {
            return false;
        }

        return $this->acceptPath($realPath) &&
               $this->acceptPrefix($filename) &&
               $this->acceptSuffix($filename);
    }

    private function acceptPath(string $path): bool
    {
        // Filter files in hidden directories by checking path that is relative to the base path.
        if (preg_match('=/\.[^/]*/=', str_replace($this->basePath, '', $path))) {
            return false;
        }

        foreach ($this->exclude as $exclude) {
            if (strpos($path, $exclude) === 0) {
                return false;
            }
        }

        return true;
    }

    private function acceptPrefix(string $filename): bool
    {
        return $this->acceptSubString($filename, $this->prefixes, self::PREFIX);
    }

    private function acceptSuffix(string $filename): bool
    {
        return $this->acceptSubString($filename, $this->suffixes, self::SUFFIX);
    }

    private function acceptSubString(string $filename, array $subStrings, int $type): bool
    {
        if (empty($subStrings)) {
            return true;
        }

        $matched = false;

        foreach ($subStrings as $string) {
            if (($type === self::PREFIX && strpos($filename, $string) === 0) ||
                ($type === self::SUFFIX &&
                 substr($filename, -1 * strlen($string)) === $string)) {
                $matched = true;

                break;
            }
        }

        return $matched;
    }
}

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                        Request Example (guzzle)
                        

                        
                            
<?php
                            
 require_once('vendor/autoload.php');
                            
 $client = new \GuzzleHttp\Client();
                            
 $response = $client->request('POST', $base_url. 'v1/generate-token', [
                            
'headers' => [
                            
  'accept' => 'application/json',
                            
  'content-type' => 'application/json',
                            
 ],
                            
'form_params' => [
                            
  'client_id'     => '$client_id',
                            
  'secret_id'     => 'secret_id',
                            
  'env'           => 'env',
                            
  'merchant_id'   => 'merchant_id',
                            
 ],
                            
                            
]);
                            
echo $response->getBody();
                        
                    
                

                    
                        
**Response: SUCCESS (200 OK)**
                        
{
                        
 "message": {
                        
 "success": [
                        
  "Successfully token is generated"
                        
 ]
                        
},
                        
"data": {
                        
 "token":"eyJpdiI6InpkczhjTjhQdVhUL2lKQ0pSUUx6aUE9P
SIsInZhbHVlIjoiVGVBTVBDTXltbjNZcEIvdEJveGpTSno3TU5NRUtn
VkhCZ1pHTFNCUnZGQ2UxMnYxN202cEE1YVRDTEFsc0ZERExoTjdtL0dTL2x
oU3QzeUJJOExiMUx5T0w1L0llUXhTUkU1cWVLWEdEbEplb0dKNXcwbTNRM0
VxdkUwYzZuNFdtNkhMQ0pRZysyNWkvdzBxSlBoSVBSOGFTekNnR2RXNHVtc
G9lMGZOTmNCcm1hR3c5Sk9KTnB4Y3ltZDl6cm90MThrR21Ca3B1azc3bXRi
Q0J6SW96UVo1elNkU1ZqeE05bTcwWGp1MEUxWlJFdnNWTmpSbnVpeW92b2U
4dXZkUGgyb1VmK0luaGdyaFlsVTZlcVpVRnZlTG1DeFF6Ykk2T2h6Z3Jzbn
IyNHpNdHowSE5JdDR0Y0pZT20zUm1XYW8iLCJtYWMiOiJlY2M4NGE1OGUzYz
kzYzk0YzljNmVmNjE0YWI0ZDIwOGI3NDQ2YWEyY2ZhNzc0NzE4ZmY1ZmYyMz

                        IyZmQzNDY1IiwidGFnIjoiIn0=",
                        
},
                        
"type": "success"
                        
}
                    
                

                    
                        
**Response: ERROR (400 FAILED)**
                        
{
                        
 "message": {
                        
 "error": [
                        
  "Invalid credentials."
                        
 ]
                        
},
                        
"data": null,
                        
"type": "error"
                        
}