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<?php
/**
* CLocale class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/

/**
* CLocale represents the data relevant to a locale.
*
* The data includes the number formatting information and date formatting information.
*
* @property string $id The locale ID (in canonical form).
* @property CNumberFormatter $numberFormatter The number formatter for this locale.
* @property CDateFormatter $dateFormatter The date formatter for this locale.
* @property string $decimalFormat The decimal format.
* @property string $currencyFormat The currency format.
* @property string $percentFormat The percent format.
* @property string $scientificFormat The scientific format.
* @property array $monthNames Month names indexed by month values (1-12).
* @property array $weekDayNames The weekday names indexed by weekday values (0-6, 0 means Sunday, 1 Monday, etc.).
* @property string $aMName The AM name.
* @property string $pMName The PM name.
* @property string $dateFormat Date format.
* @property string $timeFormat Date format.
* @property string $dateTimeFormat Datetime format, i.e., the order of date and time.
* @property string $orientation The character orientation, which is either 'ltr' (left-to-right) or 'rtl' (right-to-left).
* @property array $pluralRules Plural forms expressions.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package system.i18n
* @since 1.0
*/
class CLocale extends CComponent
{
/**
* @var string the directory that contains the locale data. If this property is not set,
* the locale data will be loaded from 'framework/i18n/data'.
* @since 1.1.0
*/
public static $dataPath;

private $_id;
private $_data;
private $_dateFormatter;
private $_numberFormatter;

/**
* Returns the instance of the specified locale.
* Since the constructor of CLocale is protected, you can only use
* this method to obtain an instance of the specified locale.
* @param string $id the locale ID (e.g. en_US)
* @return CLocale the locale instance
*/
public static function getInstance($id)
{
static $locales=array();
if(isset($locales[$id]))
return $locales[$id];
else
return $locales[$id]=new CLocale($id);
}

/**
* @return array IDs of the locales which the framework can recognize
*/
public static function getLocaleIDs()
{
static $locales;
if($locales===null)
{
$locales=array();
$dataPath=self::$dataPath===null ? dirname(__FILE__).DIRECTORY_SEPARATOR.'data' : self::$dataPath;
$folder=@opendir($dataPath);
while(($file=@readdir($folder))!==false)
{
$fullPath=$dataPath.DIRECTORY_SEPARATOR.$file;
if(substr($file,-4)==='.php' && is_file($fullPath))
$locales[]=substr($file,0,-4);
}
closedir($folder);
sort($locales);
}
return $locales;
}

/**
* Constructor.
* Since the constructor is protected, please use {@link getInstance}
* to obtain an instance of the specified locale.
* @param string $id the locale ID (e.g. en_US)
*/
protected function __construct($id)
{
$this->_id=self::getCanonicalID($id);
$dataPath=self::$dataPath===null ? dirname(__FILE__).DIRECTORY_SEPARATOR.'data' : self::$dataPath;
$dataFile=$dataPath.DIRECTORY_SEPARATOR.$this->_id.'.php';
if(is_file($dataFile))
$this->_data=require($dataFile);
else
throw new CException(Yii::t('yii','Unrecognized locale "{locale}".',array('{locale}'=>$id)));
}

/**
* Converts a locale ID to its canonical form.
* In canonical form, a locale ID consists of only underscores and lower-case letters.
* @param string $id the locale ID to be converted
* @return string the locale ID in canonical form
*/
public static function getCanonicalID($id)
{
return strtolower(str_replace('-','_',$id));
}

/**
* @return string the locale ID (in canonical form)
*/
public function getId()
{
return $this->_id;
}

/**
* @return CNumberFormatter the number formatter for this locale
*/
public function getNumberFormatter()
{
if($this->_numberFormatter===null)
$this->_numberFormatter=new CNumberFormatter($this);
return $this->_numberFormatter;
}

/**
* @return CDateFormatter the date formatter for this locale
*/
public function getDateFormatter()
{
if($this->_dateFormatter===null)
$this->_dateFormatter=new CDateFormatter($this);
return $this->_dateFormatter;
}

/**
* @param string $currency 3-letter ISO 4217 code. For example, the code "USD" represents the US Dollar and "EUR" represents the Euro currency.
* @return string the localized currency symbol. Null if the symbol does not exist.
*/
public function getCurrencySymbol($currency)
{
return isset($this->_data['currencySymbols'][$currency]) ? $this->_data['currencySymbols'][$currency] : null;
}

/**
* @param string $name symbol name
* @return string symbol
*/
public function getNumberSymbol($name)
{
return isset($this->_data['numberSymbols'][$name]) ? $this->_data['numberSymbols'][$name] : null;
}

/**
* @return string the decimal format
*/
public function getDecimalFormat()
{
return $this->_data['decimalFormat'];
}

/**
* @return string the currency format
*/
public function getCurrencyFormat()
{
return $this->_data['currencyFormat'];
}

/**
* @return string the percent format
*/
public function getPercentFormat()
{
return $this->_data['percentFormat'];
}

/**
* @return string the scientific format
*/
public function getScientificFormat()
{
return $this->_data['scientificFormat'];
}

/**
* @param integer $month month (1-12)
* @param string $width month name width. It can be 'wide', 'abbreviated' or 'narrow'.
* @param boolean $standAlone whether the month name should be returned in stand-alone format
* @return string the month name
*/
public function getMonthName($month,$width='wide',$standAlone=false)
{
if($standAlone)
return isset($this->_data['monthNamesSA'][$width][$month]) ? $this->_data['monthNamesSA'][$width][$month] : $this->_data['monthNames'][$width][$month];
else
return isset($this->_data['monthNames'][$width][$month]) ? $this->_data['monthNames'][$width][$month] : $this->_data['monthNamesSA'][$width][$month];
}

/**
* Returns the month names in the specified width.
* @param string $width month name width. It can be 'wide', 'abbreviated' or 'narrow'.
* @param boolean $standAlone whether the month names should be returned in stand-alone format
* @return array month names indexed by month values (1-12)
*/
public function getMonthNames($width='wide',$standAlone=false)
{
if($standAlone)
return isset($this->_data['monthNamesSA'][$width]) ? $this->_data['monthNamesSA'][$width] : $this->_data['monthNames'][$width];
else
return isset($this->_data['monthNames'][$width]) ? $this->_data['monthNames'][$width] : $this->_data['monthNamesSA'][$width];
}

/**
* @param integer $day weekday (0-7, 0 and 7 means Sunday)
* @param string $width weekday name width. It can be 'wide', 'abbreviated' or 'narrow'.
* @param boolean $standAlone whether the week day name should be returned in stand-alone format
* @return string the weekday name
*/
public function getWeekDayName($day,$width='wide',$standAlone=false)
{
$day=$day%7;
if($standAlone)
return isset($this->_data['weekDayNamesSA'][$width][$day]) ? $this->_data['weekDayNamesSA'][$width][$day] : $this->_data['weekDayNames'][$width][$day];
else
return isset($this->_data['weekDayNames'][$width][$day]) ? $this->_data['weekDayNames'][$width][$day] : $this->_data['weekDayNamesSA'][$width][$day];
}

/**
* Returns the week day names in the specified width.
* @param string $width weekday name width. It can be 'wide', 'abbreviated' or 'narrow'.
* @param boolean $standAlone whether the week day name should be returned in stand-alone format
* @return array the weekday names indexed by weekday values (0-6, 0 means Sunday, 1 Monday, etc.)
*/
public function getWeekDayNames($width='wide',$standAlone=false)
{
if($standAlone)
return isset($this->_data['weekDayNamesSA'][$width]) ? $this->_data['weekDayNamesSA'][$width] : $this->_data['weekDayNames'][$width];
else
return isset($this->_data['weekDayNames'][$width]) ? $this->_data['weekDayNames'][$width] : $this->_data['weekDayNamesSA'][$width];
}

/**
* @param integer $era era (0,1)
* @param string $width era name width. It can be 'wide', 'abbreviated' or 'narrow'.
* @return string the era name
*/
public function getEraName($era,$width='wide')
{
return $this->_data['eraNames'][$width][$era];
}

/**
* @return string the AM name
*/
public function getAMName()
{
return $this->_data['amName'];
}

/**
* @return string the PM name
*/
public function getPMName()
{
return $this->_data['pmName'];
}

/**
* @param string $width date format width. It can be 'full', 'long', 'medium' or 'short'.
* @return string date format
*/
public function getDateFormat($width='medium')
{
return $this->_data['dateFormats'][$width];
}

/**
* @param string $width time format width. It can be 'full', 'long', 'medium' or 'short'.
* @return string date format
*/
public function getTimeFormat($width='medium')
{
return $this->_data['timeFormats'][$width];
}

/**
* @return string datetime format, i.e., the order of date and time.
*/
public function getDateTimeFormat()
{
return $this->_data['dateTimeFormat'];
}

/**
* @return string the character orientation, which is either 'ltr' (left-to-right) or 'rtl' (right-to-left)
* @since 1.1.2
*/
public function getOrientation()
{
return isset($this->_data['orientation']) ? $this->_data['orientation'] : 'ltr';
}

/**
* @return array plural forms expressions
*/
public function getPluralRules()
{
return isset($this->_data['pluralRules']) ? $this->_data['pluralRules'] : array();
}

/**
* Converts a locale ID to a language ID.
* A language ID consists of only the first group of letters before an underscore or dash.
* @param string $id the locale ID to be converted
* @return string the language ID
* @since 1.1.9
*/
public function getLanguageID($id)
{
// normalize id
$id = $this->getCanonicalID($id);
// remove sub tags
if(($underscorePosition=strpos($id, '_'))!== false)
{
$id = substr($id, 0, $underscorePosition);
}
return $id;
}

/**
* Converts a locale ID to a script ID.
* A script ID consists of only the last four characters after an underscore or dash.
* @param string $id the locale ID to be converted
* @return string the script ID
* @since 1.1.9
*/
public function getScriptID($id)
{
// normalize id
$id = $this->getCanonicalID($id);
// find sub tags
if(($underscorePosition=strpos($id, '_'))!==false)
{
$subTag = explode('_', $id);
// script sub tags can be distigused from territory sub tags by length
if (strlen($subTag[1])===4)
{
$id = $subTag[1];
}
else
{
$id = null;
}
}
else
{
$id = null;
}
return $id;
}

/**
* Converts a locale ID to a territory ID.
* A territory ID consists of only the last two to three letter or digits after an underscore or dash.
* @param string $id the locale ID to be converted
* @return string the territory ID
* @since 1.1.9
*/
public function getTerritoryID($id)
{
// normalize id
$id = $this->getCanonicalID($id);
// find sub tags
if (($underscorePosition=strpos($id, '_'))!== false)
{
$subTag = explode('_', $id);
// territory sub tags can be distigused from script sub tags by length
if (isset($subTag[2]) && strlen($subTag[2])<4)
{
$id = $subTag[2];
}
elseif (strlen($subTag[1])<4)
{
$id = $subTag[1];
}
else
{
$id = null;
}
}
else
{
$id = null;
}
return $id;
}

/**
* Gets a localized name from i18n data file (one of framework/i18n/data/ files).
*
* @param string $id array key from an array named by $category.
* @param string $category data category. One of 'languages', 'scripts' or 'territories'.
* @return string the localized name for the id specified. Null if data does not exist.
* @since 1.1.9
*/
public function getLocaleDisplayName($id=null, $category='languages')
{
$id = $this->getCanonicalID($id);
if (($category == 'languages') && ($id=$this->getLanguageID($id)) && (isset($this->_data[$category][$id])))
{
return $this->_data[$category][$id];
}
elseif (($category == 'scripts') && ($id=$this->getScriptID($id)) && (isset($this->_data[$category][$id])))
{
return $this->_data[$category][$id];
}
elseif (($category == 'territories') && ($id=$this->getTerritoryID($id)) && (isset($this->_data[$category][$id])))
{
return $this->_data[$category][$id];
}
elseif (isset($this->_data[$category][$id]))
{
return $this->_data[$category][$id];
}
else {
return null;
}
}

/**
* @param string $id Unicode language identifier from IETF BCP 47. For example, the code "en_US" represents U.S. English and "en_GB" represents British English.
* @return string the local display name for the language. Null if the language code does not exist.
* @since 1.1.9
*/
public function getLanguage($id)
{
return $this->getLocaleDisplayName($id, 'languages');
}

/**
* @param string $id Unicode script identifier from IETF BCP 47. For example, the code "en_US" represents U.S. English and "en_GB" represents British English.
* @return string the local display name for the script. Null if the script code does not exist.
* @since 1.1.9
*/
public function getScript($id)
{
return $this->getLocaleDisplayName($id, 'scripts');
}

/**
* @param string $id Unicode territory identifier from IETF BCP 47. For example, the code "en_US" represents U.S. English and "en_GB" represents British English.
* @return string the local display name for the territory. Null if the territory code does not exist.
* @since 1.1.9
*/
public function getTerritory($id)
{
return $this->getLocaleDisplayName($id, 'territories');
}
}
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