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<?php

namespace Give\Tracking\TrackingData;

use Give\Tracking\Contracts\TrackData;

/**
 * Class ServerData
 *
 * Represents the server data.
 *
 * @package Give\Tracking\TrackingData
 * @since 2.10.0
 */
class ServerData implements TrackData
{

    /**
     * Returns the collection data.
     *
     * @since 2.10.0
     *
     * @return array The collection data.
     */
    public function get()
    {
        return $this->getServerData();
    }

    /**
     * Returns the values with server details.
     *
     * @since 2.10.0
     *
     * @return array Array with the value.
     */
    private function getServerData()
    {
        $server_data = [];

        // Validate if the server address is a valid IP-address.
        $ipaddress = filter_input(INPUT_SERVER, 'SERVER_ADDR', FILTER_VALIDATE_IP);
        if ($ipaddress) {
            $server_data['server_ip'] = $ipaddress;
            $server_data['server_hostname'] = gethostbyaddr($ipaddress);
        }

        $server_data['server_os'] = php_uname();
        $server_data['php_version'] = PHP_VERSION;
        $server_data = array_merge($server_data, $this->getCurlInfo());

        return $server_data;
    }

    /**
     * Returns details about the curl version.
     *
     * @since 2.10.0
     *
     * @return array|null The curl info. Or null when curl isn't available..
     */
    private function getCurlInfo()
    {
        if ( ! function_exists('curl_version')) {
            return null;
        }

        $curl = curl_version();

        $ssl_support = 1;
        if ( ! $curl['features'] && CURL_VERSION_SSL) {
            $ssl_support = 0;
        }

        return [
            'curl_version' => $curl['version'],
            'is_ssl' => $ssl_support,
        ];
    }
}