public function __construct()
{
$cacheDir = __DIR__ . '/../../../../../app/cache/';
$issueFileCacheDir = $cacheDir . 'api_issue_file/';
if (!is_dir($cacheDir) || !is_dir($issueFileCacheDir)) {
mkdir($issueFileCacheDir, 0775, true);
}
if (!file_exists($issueFileCacheDir . 'sampleIssueFile')) {
file_put_contents($issueFileCacheDir . 'sampleIssueFile', file_get_contents($this->sampleIssueFile));
}
$this->sampleIssueFileEncoded = base64_encode(file_get_contents($issueFileCacheDir . 'sampleIssueFile'));
}