<?php
/**
* Work with licenses
*/
class Wpil_License
{
/**
* Register services
*/
public function register()
{
add_action('wp_ajax_wpil_license_activate', array(__CLASS__, 'ajax_wpil_license_activate'));
}
public static function init()
{
if (!empty($_GET['wpil_deactivate']))
{
update_option(WPIL_OPTION_LICENSE_STATUS, 'invalid');
update_option(WPIL_OPTION_LICENSE_LAST_ERROR, $message='Deactivated manually');
}
include WP_INTERNAL_LINKING_PLUGIN_DIR . '/templates/wpil_license.php';
}
/**
* Check if license is valid
*
* @return bool
*/
public static function isValid()
{
if (get_option('wpil_2_license_status') == 'valid') {
$prev = get_option('wpil_2_license_check_time');
$delta = $prev ? time() - strtotime($prev) : 0;
if (!$prev || $delta > (60*60*24*3) || !empty($_GET['wpil_check_license'])) {
$license = self::getKey();
self::check($license, $silent = true);
}
$status = get_option('wpil_2_license_status');
if ($status !== false && $status == 'valid') {
return true;
}
}
return true;
}
/**
* Get license key
*
* @param bool $key
* @return bool|mixed|void
*/
public static function getKey($key = false)
{
if (empty($key)) {
$key = get_option('wpil_2_license_key');
}
if (stristr($key, '-')) {
$ks = explode('-', $key);
$key = $ks[1];
}
return $key;
}
/**
* Check new license
*
* @param $license_key
* @param bool $silent
*/
public static function check($license_key, $silent = true)
{
$base_url_path = 'admin.php?page=link_whisper_license';
$item_id = self::getItemId($license_key);
$license = Wpil_License::getKey($license_key);
$code = null;
if (function_exists('curl_version')) {
//CURL is enabled
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, WPIL_STORE_URL);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS,
"edd_action=activate_license&license={$license}&item_id={$item_id}&url=".urlencode(home_url()));
$data = curl_exec($ch);
$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
// if the curl request failed, try file get contents
if(empty($code)){
$params = [
'edd_action' => 'activate_license',
'license' => $license,
'item_id' => $item_id,
'url' => urlencode(home_url()),
];
$data = file_get_contents(WPIL_STORE_URL . '/?' . http_build_query($params));
if (!empty($data)) {
$code = 200;
}
}
} else {
//CURL is disabled
$params = [
'edd_action' => 'activate_license',
'license' => $license,
'item_id' => $item_id,
'url' => urlencode(home_url()),
];
$data = file_get_contents(WPIL_STORE_URL . '/?' . http_build_query($params));
if (!empty($data)) {
$code = 200;
}
}
update_option(WPIL_OPTION_LICENSE_CHECK_TIME, date('c'));
if (empty($data) || $code !== 200) {
$error_message = !empty($ch) ? curl_error($ch) : '';
if ($error_message) {
$message = $error_message;
} else {
$message = "$code response code on activation, please try again or check code";
}
} else {
$license_data = json_decode($data);
if ($license_data->success === false) {
$message = self::getMessage($license, $license_data);
} else {
update_option(WPIL_OPTION_LICENSE_STATUS, $license_data->license);
update_option(WPIL_OPTION_LICENSE_KEY, $license);
update_option(WPIL_OPTION_LICENSE_DATA, var_export($license_data, true));
if (!$silent) {
$base_url = admin_url('admin.php?page=link_whisper_settings&licensing');
$message = __("License key `%s` was activated", 'wpil');
$message = sprintf($message, $license);
$redirect = add_query_arg(array('sl_activation' => 'true', 'message' => urlencode($message)), $base_url);
wp_redirect($redirect);
exit;
} else {
return;
}
}
}
if (!empty($ch)) {
curl_close($ch);
}
update_option(WPIL_OPTION_LICENSE_STATUS, 'invalid');
update_option(WPIL_OPTION_LICENSE_LAST_ERROR, $message);
if (!$silent) {
$base_url = admin_url($base_url_path);
$redirect = add_query_arg(array('sl_activation' => 'false', 'msg' => urlencode($message)), $base_url);
wp_redirect($redirect);
exit;
}
}
/**
* Check if a given site is licensed in the same plan as this site.
*
* @param string $site_url The url of the site we want to check.
* @return bool
*/
public static function check_site_license($site_url = '')
{
if(empty($site_url)){
return false;
}
// if the site has been recently checked and does have a valid license
if(self::check_cached_site_licenses($site_url)){
// return true
return true;
}
$license_key = self::getKey();
$item_id = self::getItemId($license_key);
$license = Wpil_License::getKey($license_key);
$code = null;
if (function_exists('curl_version')) {
//CURL is enabled
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, WPIL_STORE_URL);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS,
"edd_action=check_license&license={$license}&item_id={$item_id}&url=".urlencode($site_url));
$data = curl_exec($ch);
$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
} else {
//CURL is disabled
$params = [
'edd_action' => 'check_license',
'license' => $license,
'item_id' => $item_id,
'url' => urlencode($site_url),
];
$data = file_get_contents(WPIL_STORE_URL . '/?' . http_build_query($params));
if (!empty($data)) {
$code = 200;
}
}
if (!empty($ch)) {
curl_close($ch);
}
if (empty($data) || $code !== 200) {
return false;
} else {
$license_data = json_decode($data);
if(isset($license_data->license) && 'valid' === $license_data->license){
self::update_cached_site_list($site_url);
return true;
}
}
return false;
}
/**
* Checks a site url against the cached list of known licensed urls.
* Returns if the site is licensed and has been checked recently
*
* @param string $site_url
* @return bool
**/
public static function check_cached_site_licenses($site_url = ''){
$site_urls = get_option('wpil_cached_valid_sites', array());
if(empty($site_urls) || empty($site_url)){
return false;
}
$time = time();
foreach($site_urls as $url_data){
if($site_url === $url_data['site_url'] && $time < $url_data['expiration']){
return true;
}
}
return false;
}
/**
* Updates the cached site list with news of licensed sites.
*
**/
public static function update_cached_site_list($site_url = ''){
if(empty($site_url)){
return false;
}
$site_cache = get_option('wpil_cached_valid_sites', array());
foreach($site_cache as $key => $site_data){
if($site_data['site_url'] === $site_url){
unset($site_cache[$key]);
}
}
$site_cache[] = array('site_url' => $site_url, 'expiration' => (time() + (60*60*24*3)) );
update_option('wpil_cached_valid_sites', $site_cache);
}
/**
* Get current license ID
*
* @param string $license_key
* @return false|string
*/
public static function getItemId($license_key = '')
{
if ($license_key && stristr($license_key, '-')) {
$ks = explode('-', $license_key);
return $ks[0];
}
$item_id = file_get_contents(dirname(__DIR__) . '/../store-item-id.txt');
return $item_id;
}
/**
* Get license message
*
* @param $license
* @param $license_data
* @return string
*/
public static function getMessage($license, $license_data)
{
switch ($license_data->error) {
case 'expired' :
$d = date_i18n(get_option('date_format'), strtotime($license_data->expires, current_time('timestamp')));
$message = sprintf('Your license key %s expired on %s. Please renew your subscription to continue using Link Whisper.', $license, $d);
break;
case 'revoked' :
$message = 'Your License Key `%s` has been disabled';
break;
case 'missing' :
$message = 'Missing License `%s`';
break;
case 'invalid' :
case 'site_inactive' :
$message = 'The License Key `%s` is not active for this URL.';
break;
case 'item_name_mismatch' :
$message = 'It appears this License Key (%s) is used for a different product. Please log into your linkwhisper.com user account to find your Link Whisper License Key.';
break;
case 'no_activations_left':
$message = 'The License Key `%s` has reached its activation limit. Please upgrade your subscription to add more sites.';
break;
case 'invalid_item_id':
$message = "The License Key `%s` doesn't go to any known products. Fairly often this is caused by a mistake in entering the License Key or after upgrading your Link Whisper subscription. If you've just upgraded your subscription, please delete Link Whisper from your site and download a fresh copy from linkwhisper.com.";
break;
default :
$message = "Error on activation: " . $license_data->error;
break;
}
if (stristr($message, '%s')) {
$message = sprintf($message, $license);
}
return $message;
}
/**
* Activate license
*/
public static function activate()
{
if (!isset($_POST['hidden_action']) || $_POST['hidden_action'] != 'activate_license' || !check_admin_referer('wpil_activate_license_nonce', 'wpil_activate_license_nonce')) {
return;
}
$license = sanitize_text_field(trim($_POST['wpil_license_key']));
self::check($license, $silent = false);
}
/**
* Activate license via ajax call
**/
public static function ajax_wpil_license_activate(){
}
}
