function head_reference_translation()
{
//get the id of the current page
$url = isset($_SERVER["HTTPS"]) && $_SERVER["HTTPS"] == "on" ? "https://" : "http://";
$url .= $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];
$post_id = url_to_postid($url);
// get all available languages
$languages = uls_get_available_languages();
$curren_code = uls_get_user_language();
// get current language
// delete the current language site
$code_value = array_search($curren_code, $languages);
unset($languages[$code_value]);
// build the url to be tranlation
$url = '';
// get url from where it's using
if (is_home()) {
$url = get_home_url();
} else {
if (is_archive() || is_search() || is_author() || is_category() || is_tag() || is_date()) {
$url = uls_get_browser_url();
}
}
// get browser url
// if exits the url so, translate this
if (!empty($url)) {
// use all available languages and get the url translation
foreach ($languages as $language => $code) {
$translation_url = uls_get_url_translated($url, $code);
echo '<link rel="alternate" hreflang="' . substr($code, 0, 2) . '" href="' . $translation_url . '" />';
}
}
// build url to the home
if (!empty($post_id) && empty($url)) {
// change the filter
global $uls_permalink_convertion;
$uls_permalink_convertion = false;
// use all available languages and get the url translation
foreach ($languages as $language => $code) {
// get the post_id translation if the current page has translation
$translation_id = uls_get_post_translation_id($post_id, $code);
if (!empty($translation_id)) {
$translation_url = uls_get_url_translated(get_permalink($translation_id), $code);
echo '<link rel="alternate" hreflang="' . substr($code, 0, 2) . '" href="' . $translation_url . '" />';
}
}
// leave the global car like it was before
$uls_permalink_convertion = true;
}
}
/**
* This function creates a set of links with available languages.
*
* @param $url string base URL to convert.
* @param $url_type string type of language flag to add in the URL (query_var, prefix, subdomain)
* @param $type string type of links to generate (links, select) (TO-DO: select isn't available yet.)
* @param $only_lang_name if it is true, then the links don't contain the country name.
* @param $class string additional CSS class to add in the div of links generated.
*
* @return string returns the HTML code with links to translated versions.
*/
function uls_language_link_switch($url = null, $url_type = 'prefix', $type = 'links', $only_lang_name = true, $class = null)
{
//if URL is null, then it uses the current URL
if (null == $url) {
$url = uls_get_browser_url();
}
//get the available languages
$available_languages = uls_get_available_languages();
$class = null == $class ? 'uls-language-link-switch' : 'uls-language-link-switch ' . $class;
//get the current language
$current_language = uls_get_user_language();
if ('' == $current_language) {
$current_language = uls_get_site_language();
}
//set conversion of permalinks to true
global $uls_permalink_convertion;
$uls_permalink_convertion = true;
ob_start();
?>
<div class="<?php
echo $class;
?>
">
<?php
include 'uls-languages.php';
foreach ($available_languages as $code) {
if (isset($country_languages[$code])) {
if ($only_lang_name) {
$label = substr($country_languages[$code], 0, strpos($country_languages[$code], ' '));
} else {
$label = $country_languages[$code];
}
} else {
$label = $code;
}
$displayed = false;
if ($code == $current_language) {
$displayed = true;
?>
<span class="<?php
echo 'selected-language';
?>
"><?php
echo __($label, 'user-language-switch');
?>
</span>
<?php
} else {
//$current_post_id = empty($post->ID) ? url_to_postid($url) : $post->ID;
$current_post_id = url_to_postid($url);
if (0 == $current_post_id && !is_home()) {
wp_reset_query();
the_post();
$current_post_id = get_the_ID();
}
//if the current page has a post related
if (0 != $current_post_id) {
$translation_id = uls_get_post_translation_id($current_post_id, $code);
if (false !== $translation_id) {
$displayed = true;
?>
<a href="<?php
echo uls_get_url_translated(get_permalink($translation_id), $code);
?>
"><?php
echo __($label, 'user-language-switch');
?>
</a>
<?php
}
//translation url
?>
<?php
}
//current_post_id
?>
<?php
}
//if the translation isn't displayed yet
if (!$displayed) {
//get the translation based on the URL
$translation_url = uls_get_url_map_translation($url);
if (false !== $translation_url) {
?>
<a href="<?php
echo uls_get_url_translated($translation_url, $code);
?>
"><?php
echo __($label, 'user-language-switch');
?>
</a>
<?php
} else {
?>
<a href="<?php
echo uls_get_url_translated($url, $code);
?>
"><?php
echo __($label, 'user-language-switch');
?>
</a>
<?php
}
?>
<?php
}
//displayed
?>
<?php
}
?>
</div>
<?php
$res = ob_get_contents();
ob_end_clean();
//reset conversion of permalinks
$uls_permalink_convertion = false;
return $res;
}
function uls_link_filter($post_url, $post = null)
{
//if global change is enabled
global $uls_permalink_convertion;
if (!$uls_permalink_convertion) {
return $post_url;
}
//TO-DO: what happen if user is in backend? see next line
//if user is in backend
if (is_admin()) {
return $post_url;
}
//echo "enter: " . $post_url . "<br/>";
if (null == $post) {
return $post_url;
}
$post_id = $post;
if (is_object($post)) {
$post_id = $post->ID;
}
//echo "post_id: " . $post_id . "<br/>";
//get post language
$post_language = uls_get_post_language($post_id);
//get language from URL
$language = uls_get_user_language_from_url();
//get the general options
$options = uls_get_options();
//echo "lang: " . $language . "<br/>";
//if there is a language in the URL, then append the language in the link
if (false !== $language) {
//get the translation of the post
$translation_id = uls_get_post_translation_id($post_id, $language);
//echo "Trans2: $translation_id <br/>";
if ($translation_id == $post_id) {
return uls_get_url_translated($post_url, $language, $options["url_type"]);
} elseif (false !== $translation_id) {
return get_permalink($translation_id);
} else {
return uls_get_url_translated($post_url, $language, $options["url_type"]);
}
}
//if language is the same to the user saved language
$saved_language = uls_get_user_saved_language();
//echo "saved: $saved_language<br/>";
if (false === $saved_language) {
$saved_language = uls_get_site_language();
}
if ($post_language == $saved_language) {
return $post_url;
} else {
//get the translation of the post
$translation_id = uls_get_post_translation_id($post_id, $language);
//echo "Trans: $translation_id <br/>";
if ($translation_id == $post_id) {
return $post_url;
} elseif (false !== $translation_id) {
return get_permalink($translation_id);
}
}
//add language to the url
return uls_get_url_translated($post_url, $saved_language, $options["url_type"]);
}