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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*/
namespace Piwik\Translation;
use Piwik\Config;
use Piwik\Piwik;
use Piwik\Translation\Loader\LoaderInterface;
/**
* Translates messages.
*
* @api
*/
class Translator
{
/**
* Contains the translated messages, indexed by the language name.
*
* @var array
*/
private $translations = [];
/**
* @var string
*/
private $currentLanguage;
/**
* @var string
*/
private $fallback = 'en';
/**
* Directories containing the translations to load.
*
* @var string[]
*/
private $directories = [];
/**
* @var LoaderInterface
*/
private $loader;
private const LIST_TYPE_AND = 'And';
private const LIST_TYPE_OR = 'Or';
public function __construct(LoaderInterface $loader, array $directories = null)
{
$this->loader = $loader;
$this->currentLanguage = $this->getDefaultLanguage();
if ($directories === null) {
// TODO should be moved out of this class
$directories = [PIWIK_INCLUDE_PATH . '/lang'];
}
$this->directories = $directories;
}
/**
* Clean a string that may contain HTML special chars, single/double quotes, HTML entities, leading/trailing whitespace
*
* @param string $s
* @return string
*/
public static function clean($s)
{
return html_entity_decode(trim($s), ENT_QUOTES, 'UTF-8');
}
/**
* Returns an internationalized string using a translation ID. If a translation
* cannot be found for the ID, the ID is returned.
*
* @param string $translationId Translation ID, eg, `General_Date`.
* @param array|string|int $args `sprintf` arguments to be applied to the internationalized
* string.
* @param string|null $language Optionally force the language.
* @return string The translated string or `$translationId`.
* @api
*/
public function translate($translationId, $args = [], $language = null)
{
$args = is_array($args) ? $args : [$args];
$translationId = $translationId ?? '';
if (strpos($translationId, "_") !== false) {
[$plugin, $key] = explode("_", $translationId, 2);
$language = is_string($language) ? $language : $this->currentLanguage;
$translationId = $this->getTranslation($translationId, $language, $plugin, $key);
}
if (count($args) == 0) {
return str_replace('%%', '%', $translationId);
}
return vsprintf($translationId, $args);
}
/**
* Converts the given list of items into a listing (e.g. One, Two, and Three)
*
* @param array $items
* @param string|null $language
* @return string
*/
public function createAndListing(array $items, string $language = null) : string
{
return $this->createListing(self::LIST_TYPE_AND, $items, $language);
}
/**
* Converts the given list of items into a or listing (e.g. One, Two, or Three)
*
* @param array $items
* @param string|null $language
* @return string
*/
public function createOrListing(array $items, string $language = null) : string
{
return $this->createListing(self::LIST_TYPE_OR, $items, $language);
}
/**
* @param string $listType type of the list (LIST_TYPE_AND or LIST_TYPE_OR)
* @param array $items
* @param string|null $language
* @return string
*/
private function createListing(string $listType, array $items, string $language = null) : string
{
switch (count($items)) {
case 0:
return '';
case 1:
return end($items);
case 2:
$pattern = $this->translate('Intl_ListPattern' . $listType . '2', [], $language);
return str_replace(['{0}', '{1}'], [$items[0], $items[1]], $pattern);
default:
$patternStart = $this->translate('Intl_ListPattern' . $listType . 'Start', [], $language);
$patternMiddle = $this->translate('Intl_ListPattern' . $listType . 'Middle', [], $language);
$patternEnd = $this->translate('Intl_ListPattern' . $listType . 'End', [], $language);
$result = $patternStart;
while (count($items) > 2) {
$pattern = count($items) > 3 ? $patternMiddle : $patternEnd;
$result = str_replace(['{0}', '{1}'], [array_shift($items), $pattern], $result);
}
return str_replace(['{0}', '{1}'], [$items[0], $items[1]], $result);
}
}
/**
* @return string
*/
public function getCurrentLanguage()
{
return $this->currentLanguage;
}
/**
* @param string $language
*/
public function setCurrentLanguage($language)
{
if (!$language) {
$language = $this->getDefaultLanguage();
}
$this->currentLanguage = $language;
}
/**
* @return string The default configured language.
*/
public function getDefaultLanguage()
{
$generalSection = Config::getInstance()->General;
// the config may not be available (for example, during environment setup), so we default to 'en'
// if the config cannot be found.
return @$generalSection['default_language'] ?: 'en';
}
/**
* Generate javascript translations array
*/
public function getJavascriptTranslations()
{
$clientSideTranslations = array();
foreach ($this->getClientSideTranslationKeys() as $id) {
[$plugin, $key] = explode('_', $id, 2);
$clientSideTranslations[$id] = $this->decodeEntitiesSafeForHTML($this->getTranslation($id, $this->currentLanguage, $plugin, $key));
}
$js = 'var translations = ' . json_encode($clientSideTranslations) . ';';
$js .= "\n" . 'if (typeof(piwik_translations) == \'undefined\') { var piwik_translations = new Object; }' . 'for(var i in translations) { piwik_translations[i] = translations[i];} ';
return $js;
}
/**
* Decodes all entities in the given string except of > and <
*
* @param string $text
* @return string
*/
private function decodeEntitiesSafeForHTML(string $text) : string
{
// replace encoded html tag entities, as they need to remain encoded
$text = str_replace(['>', '<'], ['###gt###', '###lt###'], $text);
// decode all remaining entities
$text = html_entity_decode($text);
// recover encoded html tag entities
return str_replace(['###gt###', '###lt###'], ['>', '<'], $text);
}
/**
* Returns the list of client side translations by key. These translations will be outputted
* to the translation JavaScript.
*/
private function getClientSideTranslationKeys()
{
$result = array();
/**
* Triggered before generating the JavaScript code that allows i18n strings to be used
* in the browser.
*
* Plugins should subscribe to this event to specify which translations
* should be available to JavaScript.
*
* Event handlers should add whole translation keys, ie, keys that include the plugin name.
*
* **Example**
*
* public function getClientSideTranslationKeys(&$result)
* {
* $result[] = "MyPlugin_MyTranslation";
* }
*
* @param array &$result The whole list of client side translation keys.
*/
Piwik::postEvent('Translate.getClientSideTranslationKeys', array(&$result));
$result = array_unique($result);
return $result;
}
/**
* Add a directory containing translations.
*
* @param string $directory
*/
public function addDirectory($directory)
{
if (isset($this->directories[$directory])) {
return;
}
// index by name to avoid duplicates
$this->directories[$directory] = $directory;
// clear currently loaded translations to force reloading them
$this->translations = array();
}
/**
* Should be used by tests only, and this method should eventually be removed.
*/
public function reset()
{
$this->currentLanguage = $this->getDefaultLanguage();
$this->directories = array(PIWIK_INCLUDE_PATH . '/lang');
$this->translations = array();
}
/**
* @param string $translation
* @return null|string
*/
public function findTranslationKeyForTranslation($translation)
{
foreach ($this->getAllTranslations() as $key => $translations) {
$possibleKey = array_search($translation, $translations);
if (!empty($possibleKey)) {
return $key . '_' . $possibleKey;
}
}
return null;
}
/**
* Returns all the translation messages loaded.
*
* @return array
*/
public function getAllTranslations()
{
$this->loadTranslations($this->currentLanguage);
if (!isset($this->translations[$this->currentLanguage])) {
return array();
}
return $this->translations[$this->currentLanguage];
}
private function getTranslation($id, $lang, $plugin, $key)
{
$this->loadTranslations($lang);
if (isset($this->translations[$lang][$plugin]) && isset($this->translations[$lang][$plugin][$key])) {
return $this->translations[$lang][$plugin][$key];
}
/**
* Fallback for keys moved to new Intl plugin to avoid untranslated string in non core plugins
* @todo remove this in Piwik 3.0
*/
if ($plugin != 'Intl') {
if (isset($this->translations[$lang]['Intl']) && isset($this->translations[$lang]['Intl'][$key])) {
return $this->translations[$lang]['Intl'][$key];
}
}
// fallback
if ($lang !== $this->fallback) {
return $this->getTranslation($id, $this->fallback, $plugin, $key);
}
return $id;
}
private function loadTranslations($language)
{
if (empty($language) || isset($this->translations[$language])) {
return;
}
$this->translations[$language] = $this->loader->load($language, $this->directories);
}
}