/**
* Given an url, returns the actual link, taking in accounts the current
* language subdirectory and the current path.
* If the url is an absolute path (i.e. starting with '/') will be prepended
* the current language sub-directory.
* If the url is a relative path, will translated to an absolute path where
* the root is the language subdirectory.
* If the url is not a path (absolute urls, fragments, etc) is left as it is.
*
* The current language subdirectory and the current path are taken from the
* LocaleLinkService.
*
* If the multi-language support is disabled this method will do nothing and
* returns the path as given.
*
* @param $url (String)
* @return (String)
*/
function trlink($url)
{
// Check if the multi-language support is enabled
if (!LocaleService::isMultilangEnabled()) {
return $url;
}
// Parse the url
$linkParts = parse_url($url);
if ($linkParts === false) {
return $url;
}
// It is an absolute url or there isn't no any path
if (isset($linkParts['host']) || !isset($linkParts['path'])) {
return $url;
}
// The link's path
$linkPath = $linkParts['path'];
// Get the current lang dir and the current page path
$langDir = LocaleLinkService::getLangDir();
$currentPath = LocaleLinkService::getPagePath();
// Join the current path with the link path
$resultUrl = '';
if (substr($linkPath, 0, 1) === '/') {
// An absolute path => Replace the current one
$resultUrl = $linkPath;
} else {
// Relative paths => Merge with the current one
// Note: the $currentPath is always absolute (start with '/') and it never
// contains a trailing slash ('/')
if ($currentPath === '/') {
$resultUrl = '/' . $linkPath;
} else {
$resultUrl = dirname($currentPath) . '/' . $linkPath;
}
}
// Using http_build_url
// Available here without PECL:
// // Join the current path with the link path
// $resParts = [];
// $linkParts['path'] = $currentPath;
// http_build_url(
// $linkParts,
// array('path' => $linkPath),
// HTTP_URL_JOIN_PATH,
// $resParts
// );
// // Add the language dir
// if (!empty($langDir)) {
// $resParts['path'] = "/{$langDir}" . $resParts['path'];
// }
// return http_build_url($resParts);
// Add the language dir
if (!empty($langDir)) {
$resultUrl = "/{$langDir}" . $resultUrl;
}
// Build the final url, preserving query string and fragment
if (isset($linkParts['query'])) {
$resultUrl .= '?' . $linkParts['query'];
}
if (isset($linkParts['fragment'])) {
$resultUrl .= '#' . $linkParts['fragment'];
}
return $resultUrl;
}
