/**
* Obtain the referring affiliate's id.
* @param string $service by name
* @return int affiliate id or false if none applies
*/
public static function get_referrer_id($service = null)
{
$affiliate_id = false;
switch ($service) {
default:
if (isset($_COOKIE[AFFILIATES_COOKIE_NAME])) {
$affiliate_id = affiliates_check_affiliate_id_encoded(trim($_COOKIE[AFFILIATES_COOKIE_NAME]));
}
}
if (!$affiliate_id) {
if (get_option('aff_use_direct', true)) {
// Assume a direct referral
$affiliate_id = affiliates_get_direct_id();
}
}
return apply_filters('affiliates_service_affiliate_id', $affiliate_id, $service);
}
/**
* Looks in the query variables and sets a cookie with the affiliate id.
* Hook into parse_request.
* @param WP $wp the WordPress environment
* @link http://php.net/manual/en/function.setcookie.php
*/
function affiliates_parse_request(&$wp)
{
global $wpdb, $affiliates_options;
$pname = get_option('aff_pname', AFFILIATES_PNAME);
$affiliate_id = isset($wp->query_vars[$pname]) ? affiliates_check_affiliate_id_encoded(trim($wp->query_vars[$pname])) : null;
if (isset($wp->query_vars[$pname])) {
// affiliates-by-username uses this hook
$maybe_affiliate_id = apply_filters('affiliates_parse_request_affiliate_id', $wp->query_vars[$pname], $affiliate_id);
if ($maybe_affiliate_id !== null && $maybe_affiliate_id !== trim($wp->query_vars[$pname])) {
$affiliate_id = $maybe_affiliate_id;
}
}
if ($affiliate_id) {
$encoded_id = affiliates_encode_affiliate_id($affiliate_id);
$days = apply_filters('affiliates_cookie_timeout_days', get_option('aff_cookie_timeout_days', AFFILIATES_COOKIE_TIMEOUT_DAYS), $affiliate_id);
if ($days > 0) {
$expire = time() + AFFILIATES_COOKIE_TIMEOUT_BASE * $days;
} else {
$expire = 0;
}
if (class_exists('Affiliates_Campaign') && method_exists('Affiliates_Campaign', 'evaluate')) {
if (!empty($_REQUEST['cmid'])) {
if ($cmid = Affiliates_Campaign::evaluate($_REQUEST['cmid'], $affiliate_id)) {
$encoded_id .= '.' . $cmid;
}
}
}
setcookie(AFFILIATES_COOKIE_NAME, $encoded_id, $expire, SITECOOKIEPATH, COOKIE_DOMAIN);
affiliates_record_hit($affiliate_id);
affiliates_pixel_request();
unset($wp->query_vars[$pname]);
// we use this to avoid ending up on the blog listing page
if (get_option('aff_redirect', false) !== false) {
// use a redirect so that we end up on the desired url without the affiliate id dangling on the url
$current_url = (is_ssl() ? 'https://' : 'http://') . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
$current_url = remove_query_arg($pname, $current_url);
$current_url = preg_replace('#' . str_replace(AFFILIATES_PNAME, $pname, AFFILIATES_REGEX_PATTERN) . '#', '', $current_url);
// note that we must use delimiters other than / as these are used in AFFILIATES_REGEX_PATTERN
$status = apply_filters('affiliates_redirect_status_code', 302);
$status = intval($status);
switch ($status) {
case 300:
case 301:
case 302:
case 303:
case 304:
case 305:
case 306:
case 307:
break;
default:
$status = 302;
}
wp_redirect($current_url, $status);
exit;
// "wp_redirect() does not exit automatically and should almost always be followed by exit." @see http://codex.wordpress.org/Function_Reference/wp_redirect
}
} else {
affiliates_pixel_request();
}
}