trait XdebugRequestTrait

trait XdebugRequestTrait {
    
    /**
     * Adds xdebug cookies, from request setup.
     *
     * In order to debug web tests you need to either set a cookie, have the
     * Xdebug session in the URL or set an environment variable in case of CLI
     * requests. If the developer listens to connection on the parent site, by
     * default the cookie is not forwarded to the client side, so you cannot
     * debug the code running on the child site. In order to make debuggers work
     * this bit of information is forwarded. Make sure that the debugger listens
     * to at least three external connections.
     *
     * @param \Symfony\Component\HttpFoundation\Request $request
     *   The request.
     *
     * @return array
     *   The extracted cookies.
     */
    protected function extractCookiesFromRequest(Request $request) : array {
        $cookie_params = $request->cookies;
        $cookies = [];
        if ($cookie_params->has('XDEBUG_SESSION')) {
            $cookies['XDEBUG_SESSION'][] = $cookie_params->get('XDEBUG_SESSION');
        }
        // For CLI requests, the information is stored in $_SERVER.
        $server = $request->server;
        if ($server->has('XDEBUG_SESSION')) {
            $cookies['XDEBUG_SESSION'][] = $server->get('XDEBUG_SESSION');
        }
        elseif ($server->has('XDEBUG_CONFIG')) {
            // $_SERVER['XDEBUG_CONFIG'] has the form "key1=value1 key2=value2 ...".
            $pairs = array_filter(explode(' ', $server->get('XDEBUG_CONFIG')), function ($value) {
                return str_contains($value, '=');
            });
            foreach ($pairs as $pair) {
                [
                    $key,
                    $value,
                ] = explode('=', $pair, 2);
                // Account for key-value pairs being separated by multiple spaces.
                if (trim($key, ' ') == 'idekey') {
                    $cookies['XDEBUG_SESSION'][] = trim($value, ' ');
                }
            }
        }
        return $cookies;
    }

}