117 lines
3.8 KiB
PHP
117 lines
3.8 KiB
PHP
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<?php
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/**
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* CGettextMessageSource class file.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.yiiframework.com/
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* @copyright 2008-2013 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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/**
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* CGettextMessageSource represents a message source that is based on GNU Gettext.
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*
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* Each CGettextMessageSource instance represents the message tranlations
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* for a single domain. And each message category represents a message context
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* in Gettext. Translated messages are stored as either a MO or PO file,
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* depending on the {@link useMoFile} property value.
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*
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* All translations are saved under the {@link basePath} directory.
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* Translations in one language are kept as MO or PO files under an individual
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* subdirectory whose name is the language ID. The file name is specified via
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* {@link catalog} property, which defaults to 'messages'.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @package system.i18n
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* @since 1.0
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*/
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class CGettextMessageSource extends CMessageSource
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{
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const CACHE_KEY_PREFIX='Yii.CGettextMessageSource.';
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const MO_FILE_EXT='.mo';
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const PO_FILE_EXT='.po';
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/**
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* @var integer the time in seconds that the messages can remain valid in cache.
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* Defaults to 0, meaning the caching is disabled.
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*/
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public $cachingDuration=0;
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/**
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* @var string the ID of the cache application component that is used to cache the messages.
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* Defaults to 'cache' which refers to the primary cache application component.
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* Set this property to false if you want to disable caching the messages.
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*/
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public $cacheID='cache';
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/**
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* @var string the base path for all translated messages. Defaults to null, meaning
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* the "messages" subdirectory of the application directory (e.g. "protected/messages").
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*/
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public $basePath;
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/**
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* @var boolean whether to load messages from MO files. Defaults to true.
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* If false, messages will be loaded from PO files.
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*/
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public $useMoFile=true;
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/**
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* @var boolean whether to use Big Endian to read and write MO files.
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* Defaults to false. This property is only used when {@link useMoFile} is true.
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*/
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public $useBigEndian=false;
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/**
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* @var string the message catalog name. This is the name of the message file (without extension)
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* that stores the translated messages. Defaults to 'messages'.
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*/
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public $catalog='messages';
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/**
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* Initializes the application component.
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* This method overrides the parent implementation by preprocessing
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* the user request data.
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*/
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public function init()
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{
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parent::init();
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if($this->basePath===null)
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$this->basePath=Yii::getPathOfAlias('application.messages');
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}
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/**
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* Loads the message translation for the specified language and category.
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* @param string $category the message category
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* @param string $language the target language
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* @return array the loaded messages
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*/
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protected function loadMessages($category, $language)
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{
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$messageFile=$this->basePath . DIRECTORY_SEPARATOR . $language . DIRECTORY_SEPARATOR . $this->catalog;
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if($this->useMoFile)
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$messageFile.=self::MO_FILE_EXT;
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else
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$messageFile.=self::PO_FILE_EXT;
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if ($this->cachingDuration > 0 && $this->cacheID!==false && ($cache=Yii::app()->getComponent($this->cacheID))!==null)
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{
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$key = self::CACHE_KEY_PREFIX . $messageFile . "." . $category;
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if (($data=$cache->get($key)) !== false)
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return unserialize($data);
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}
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if (is_file($messageFile))
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{
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if($this->useMoFile)
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$file=new CGettextMoFile($this->useBigEndian);
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else
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$file=new CGettextPoFile();
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$messages=$file->load($messageFile,$category);
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if(isset($cache))
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{
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$dependency=new CFileCacheDependency($messageFile);
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$cache->set($key,serialize($messages),$this->cachingDuration,$dependency);
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}
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return $messages;
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}
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else
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return array();
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}
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}
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