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<?php |
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declare(strict_types=1); |
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namespace AppLocalize; |
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use AppUtils\ConvertHelper\JSONConverter; |
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use AppUtils\FileHelper; |
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use AppUtils\FileHelper\FileInfo; |
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use AppUtils\FileHelper\FolderInfo; |
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use AppUtils\FileHelper_Exception; |
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class Localization_ClientGenerator |
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{ |
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public const ERROR_JS_FOLDER_NOT_FOUND = 39302; |
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public const ERROR_TARGET_FOLDER_NOT_WRITABLE = 39303; |
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protected Localization_Translator $translator; |
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protected ?FolderInfo $targetFolder = null; |
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protected ?FileInfo $cacheKeyFile = null; |
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protected ?string $cacheKey = null; |
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public function __construct() |
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{ |
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$this->translator = Localization::getTranslator(); |
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Localization::onLocaleChanged(function () { |
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$this->handleLocaleChanged(); |
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}); |
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Localization::onCacheKeyChanged(function () { |
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$this->handleCacheKeyChanged(); |
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}); |
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Localization::onClientFolderChanged(function () { |
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$this->handleFolderChanged(); |
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}); |
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} |
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private function getTargetFolder() : ?FolderInfo |
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{ |
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$folder = Localization::getClientFolder(); |
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if(!empty($folder)) { |
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return FolderInfo::factory($folder); |
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} |
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return null; |
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} |
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private function getCacheKeyFile() : ?FileInfo |
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{ |
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$folder = $this->getTargetFolder(); |
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if($folder !== null) { |
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return FileInfo::factory($folder.'/cachekey.txt'); |
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} |
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return null; |
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} |
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private function handleLocaleChanged() : void |
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{ |
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self::log('EVENT | Locale changed | Resetting internal cache.'); |
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$this->handleCacheKeyChanged(); |
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} |
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private function handleCacheKeyChanged() : void |
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{ |
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self::log('EVENT | Cache Key changed | Resetting internal cache.'); |
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$this->cacheKey = null; |
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self::$systemKey = null; |
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} |
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private function handleFolderChanged() : void |
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{ |
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self::log('EVENT | Client folder changed | Resetting internal cache.'); |
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$this->targetFolder = null; |
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$this->cacheKeyFile = null; |
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} |
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public static function setLoggingEnabled(bool $enabled) : void |
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{ |
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self::$logging = $enabled; |
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} |
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private static bool $logging = false; |
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private static function log(string $message, ...$args) : void |
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{ |
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if(self::$logging === false) { |
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return; |
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} |
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echo sprintf($message, ...$args).PHP_EOL; |
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} |
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public function getCacheKey() : ?string |
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{ |
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if(isset($this->cacheKey)) { |
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return $this->cacheKey; |
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} |
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$file = $this->getCacheKeyFile(); |
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if($file !== null && $file->exists()) { |
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$this->cacheKey = $file->getContents(); |
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} |
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return $this->cacheKey; |
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} |
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/** |
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* @throws Localization_Exception |
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* @throws FileHelper_Exception |
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*/ |
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public function writeFiles() : void |
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{ |
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self::log('Write Files'); |
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if($this->getCacheKey() === self::getSystemKey()) { |
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self::log('Write Files | SKIP | Still up to date.'); |
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return; |
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} |
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$targetFolder = $this->getTargetFolder(); |
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// no client libraries folder set: ignore. |
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if($targetFolder === null) { |
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self::log('Write Files | SKIP | No folder set.'); |
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return; |
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} |
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$targetFolder |
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->create() |
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->requireReadable(self::ERROR_TARGET_FOLDER_NOT_WRITABLE); |
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$this->writeLocaleFiles(); |
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$this->writeLibraryFiles(); |
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$this->writeCacheKey(); |
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} |
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/** |
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* Retrieves a list of all localization client |
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* files that are written to disk. This includes |
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* the locale files and the libraries required |
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* to make it work clientside. |
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* |
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* @return string[] |
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*/ |
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public function getFilesList() : array |
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{ |
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$files = array(); |
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foreach($this->libraries as $fileName) |
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{ |
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$files[] = $this->getLibraryFilePath($fileName); |
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} |
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foreach($this->getTargetLocales() as $locale) |
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{ |
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$files[] = $this->getLocaleFilePath($locale); |
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} |
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return $files; |
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} |
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protected function writeLocaleFiles() : void |
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{ |
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self::log('Write Files | Writing locales.'); |
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foreach(self::getTargetLocales() as $locale) |
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{ |
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$this->writeLocaleFile($locale); |
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} |
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} |
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/** |
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* @var string[] |
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*/ |
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protected array $libraries = array( |
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'translator.js', |
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'md5.min.js' |
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); |
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/** |
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* @throws FileHelper_Exception |
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* @throws Localization_Exception |
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*/ |
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protected function writeLibraryFiles() : void |
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{ |
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$sourceFolder = FolderInfo::factory(__DIR__.'/../js'); |
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if(!$sourceFolder->exists()) |
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{ |
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throw new Localization_Exception( |
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'Unexpected folder structure encountered.', |
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sprintf( |
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'The [js] folder is not in the expected location at [%s].', |
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$sourceFolder |
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), |
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self::ERROR_JS_FOLDER_NOT_FOUND |
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); |
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} |
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foreach($this->libraries as $fileName) |
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{ |
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$targetFile = $this->getLibraryFilePath($fileName); |
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$sourceFile = $sourceFolder.'/'.$fileName; |
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FileHelper::copyFile($sourceFile, $targetFile); |
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} |
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} |
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/** |
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* @return Localization_Locale[] |
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*/ |
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protected static function getTargetLocales() : array |
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{ |
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$result = array(); |
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foreach(Localization::getAppLocales() as $locale) { |
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if($locale->isNative()) { |
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continue; |
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} |
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$result[] = $locale; |
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} |
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return $result; |
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} |
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protected static function getTargetLocaleIDs() : array |
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{ |
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$result = array(); |
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foreach(self::getTargetLocales() as $locale) { |
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$result[] = $locale->getName(); |
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} |
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return $result; |
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} |
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protected function getLibraryFilePath(string $fileName) : string |
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{ |
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return $this->getTargetFolder().'/'.$fileName; |
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} |
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protected function getLocaleFilePath(Localization_Locale $locale) : string |
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{ |
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return sprintf( |
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'%s/locale-%s.js', |
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$this->getTargetFolder(), |
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$locale->getLanguageCode() |
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); |
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} |
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/** |
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* Generates the JavaScript code to register all |
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* clientside strings using the bundled client |
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* libraries. |
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* |
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* The application has to decide how to serve this |
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* content in its pages: There are two main ways to |
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* do it: |
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* |
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* 1) Save it to a Javascript file and include that |
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* 2) Serve it as application/javascript content via PHP |
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* |
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* NOTE: Caching has to be handled on the application |
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* side. This method creates a fresh collection each time. |
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*/ |
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protected function writeLocaleFile(Localization_Locale $locale) : void |
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{ |
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self::log('Write Files | Writing locale [%s].', $locale->getName()); |
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$path = $this->getLocaleFilePath($locale); |
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$strings = $this->translator->getClientStrings($locale); |
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$tokens = array(); |
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foreach($strings as $hash => $text) |
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{ |
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if(empty($text)) { |
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continue; |
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} |
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$tokens[] = sprintf( |
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"a('%s',%s)", |
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$hash, |
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JSONConverter::var2json($text) |
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); |
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} |
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if(empty($tokens)) |
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{ |
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$content = '/* No strings found. */'; |
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} |
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else |
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{ |
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$content = |
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'/**'.PHP_EOL. |
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' * @generated '.date('Y-m-d H:i:s').PHP_EOL. |
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' */'.PHP_EOL. |
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'AppLocalize_Translator.'.implode('.', $tokens).';'; |
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} |
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FileHelper::saveFile($path, $content); |
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} |
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private static ?string $systemKey = null; |
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public static function getSystemKey() : string |
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{ |
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if(!isset(self::$systemKey)) { |
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self::$systemKey = sprintf( |
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'Lib:%s|System:%s|Locales:%s', |
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Localization::getClientLibrariesCacheKey(), |
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Localization::getVersion(), |
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implode(',', self::getTargetLocaleIDs()) |
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); |
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self::log('System Key generated: [%s].', self::$systemKey); |
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} |
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return self::$systemKey; |
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} |
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/** |
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* Generates the cache key file, which is used to determine |
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* automatically whether the client libraries need to be |
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* refreshed. |
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*/ |
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protected function writeCacheKey() : void |
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{ |
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$this->cacheKey = self::getSystemKey(); |
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$file = $this->getCacheKeyFile(); |
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if($file !== null) { |
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$file->putContents($this->cacheKey); |
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} |
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self::log('Write Files | Cache key written.'); |
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} |
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/** |
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* Whether the localization files have been written to |
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* disk this session. |
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* |
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* @return bool |
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*/ |
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public function areFilesWritten() : bool |
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{ |
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return $this->getCacheKey() === self::getSystemKey(); |
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} |
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} |
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