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<?php
/**
* Elgg language module
* Functions to manage language and translations.
*
* @package Elgg
* @subpackage Core
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
* @author Curverider Ltd
* @copyright Curverider Ltd 2008-2009
* @link http://elgg.org/
*/
/**
* Add a translation.
*
* Translations are arrays in the Zend Translation array format, eg:
*
* $english = array('message1' => 'message1', 'message2' => 'message2');
* $german = array('message1' => 'Nachricht1','message2' => 'Nachricht2');
*
* @param string $country_code Standard country code (eg 'en', 'nl', 'es')
* @param array $language_array Formatted array of strings
* @return true|false Depending on success
*/
function add_translation($country_code, $language_array) {
global $CONFIG;
if (!isset($CONFIG->translations))
$CONFIG->translations = array();
$country_code = strtolower($country_code);
$country_code = trim($country_code);
if (is_array($language_array) && sizeof($language_array) > 0 && $country_code != "") {
if (!isset($CONFIG->translations[$country_code])) {
$CONFIG->translations[$country_code] = $language_array;
} else {
$CONFIG->translations[$country_code] = array_merge($CONFIG->translations[$country_code],$language_array);
}
return true;
}
return false;
}
/**
* Detect the current language being used by the current site or logged in user.
*
*/
function get_current_language()
{
global $CONFIG;
$language = get_language();
if (!$language)
$language = 'en';
return $language;
}
/**
* Gets the current language in use by the system or user.
*
* [Marcus Povey 20090216: Not sure why this func is necessary.]
*
* @return string The language code (eg "en")
*/
function get_language() {
global $CONFIG;
$user = get_loggedin_user();
if ((empty($language)) && ($user) && ($user->language))
$language = $user->language;
if ((!$language) && ($CONFIG->language))
$language = $CONFIG->language;
if ($language) {
return $language;
}
return false;
}
/**
* Given a message shortcode, returns an appropriately translated full-text string
*
* @param string $message_key The short message code
* @param string $language Optionally, the standard language code (defaults to the site default, then English)
* @return string Either the translated string, or the original English string, or an empty string
*/
function elgg_echo($message_key, $language = "") {
global $CONFIG;
$language = get_language();
if (isset($CONFIG->translations[$language][$message_key])) {
return $CONFIG->translations[$language][$message_key];
} else if (isset($CONFIG->translations["en"][$message_key])) {
return $CONFIG->translations["en"][$message_key];
}
return $message_key;
}
/**
* When given a full path, finds translation files and loads them
*
* @param string $path Full path
* @param bool $load_all If true all languages are loaded, if false only the current language + en are loaded
*/
function register_translations($path, $load_all = false) {
global $CONFIG;
// Make a note of this path just incase we need to register this language later
if(!isset($CONFIG->language_paths)) $CONFIG->language_paths = array();
$CONFIG->language_paths[$path] = true;
// Get the current language based on site defaults and user preference
$current_language = get_current_language();
if (isset($CONFIG->debug) && $CONFIG->debug == true) error_log("Translations loaded from : $path");
if ($handle = opendir($path)) {
while ($language = readdir($handle)) {
if (
((in_array($language, array('en.php', $current_language . '.php'))) && (!is_dir($path . $language))) ||
(($load_all) && (strpos($language, '.php')!==false) && (!is_dir($path . $language)))
)
include_once($path . $language);
}
}
else
error_log("Missing translation path $path");
}
/**
* Reload all translations from all registered paths.
*
* This is only called by functions which need to know all possible translations, namely the
* statistic gathering ones.
*
* TODO: Better on demand loading based on language_paths array
*
* @return bool
*/
function reload_all_translations()
{
global $CONFIG;
static $LANG_RELOAD_ALL_RUN;
if ($LANG_RELOAD_ALL_RUN) return null;
foreach ($CONFIG->language_paths as $path => $dummy)
register_translations($path, true);
$LANG_RELOAD_ALL_RUN = true;
}
/**
* Return an array of installed translations as an associative array "two letter code" => "native language name".
*/
function get_installed_translations()
{
global $CONFIG;
// Ensure that all possible translations are loaded
reload_all_translations();
$installed = array();
foreach ($CONFIG->translations as $k => $v)
{
$installed[$k] = elgg_echo($k, $k);
$completeness = get_language_completeness($k);
if ((isadminloggedin()) && ($completeness<100) && ($k!='en'))
$installed[$k] .= " (" . $completeness . "% " . elgg_echo('complete') . ")";
}
return $installed;
}
/**
* Return the level of completeness for a given language code (compared to english)
*/
function get_language_completeness($language)
{
global $CONFIG;
// Ensure that all possible translations are loaded
reload_all_translations();
$language = sanitise_string($language);
$en = count($CONFIG->translations['en']);
$missing = get_missing_language_keys($language);
if ($missing) $missing = count($missing); else $missing = 0;
//$lang = count($CONFIG->translations[$language]);
$lang = $en - $missing;
return round(($lang / $en) * 100, 2);
}
/**
* Return the translation keys missing from a given language, or those that are identical to the english version.
*/
function get_missing_language_keys($language)
{
global $CONFIG;
// Ensure that all possible translations are loaded
reload_all_translations();
$missing = array();
foreach ($CONFIG->translations['en'] as $k => $v)
{
if ((!isset($CONFIG->translations[$language][$k]))
|| ($CONFIG->translations[$language][$k] == $CONFIG->translations['en'][$k]))
$missing[] = $k;
}
if (count($missing))
return $missing;
return false;
}
/**
* Initialise and register language translations.
*
*/
function languages_init()
{
register_translations(dirname(dirname(dirname(__FILE__))) . "/languages/");
}
register_elgg_event_handler('boot','system','languages_init',11); // Load languages after config.
?>
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