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<?php
/*
* This file is part of SwiftMailer.
* (c) 2004-2009 Chris Corbyn
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Standard factory for creating CharacterReaders.
*
* @author Chris Corbyn
*/
class Swift_CharacterReaderFactory_SimpleCharacterReaderFactory implements Swift_CharacterReaderFactory
{
/**
* A map of charset patterns to their implementation classes.
*
* @var array
*/
private static $map = [];
/**
* Factories which have already been loaded.
*
* @var Swift_CharacterReaderFactory[]
*/
private static $loaded = [];
/**
* Creates a new CharacterReaderFactory.
*/
public function __construct()
{
$this->init();
}
public function __wakeup()
{
$this->init();
}
public function init()
{
if (\count(self::$map) > 0) {
return;
}
$prefix = 'Swift_CharacterReader_';
$singleByte = [
'class' => $prefix.'GenericFixedWidthReader',
'constructor' => [1],
];
$doubleByte = [
'class' => $prefix.'GenericFixedWidthReader',
'constructor' => [2],
];
$fourBytes = [
'class' => $prefix.'GenericFixedWidthReader',
'constructor' => [4],
];
// Utf-8
self::$map['utf-?8'] = [
'class' => $prefix.'Utf8Reader',
'constructor' => [],
];
//7-8 bit charsets
self::$map['(us-)?ascii'] = $singleByte;
self::$map['(iso|iec)-?8859-?[0-9]+'] = $singleByte;
self::$map['windows-?125[0-9]'] = $singleByte;
self::$map['cp-?[0-9]+'] = $singleByte;
self::$map['ansi'] = $singleByte;
self::$map['macintosh'] = $singleByte;
self::$map['koi-?7'] = $singleByte;
self::$map['koi-?8-?.+'] = $singleByte;
self::$map['mik'] = $singleByte;
self::$map['(cork|t1)'] = $singleByte;
self::$map['v?iscii'] = $singleByte;
//16 bits
self::$map['(ucs-?2|utf-?16)'] = $doubleByte;
//32 bits
self::$map['(ucs-?4|utf-?32)'] = $fourBytes;
// Fallback
self::$map['.*'] = $singleByte;
}
/**
* Returns a CharacterReader suitable for the charset applied.
*
* @param string $charset
*
* @return Swift_CharacterReader
*/
public function getReaderFor($charset)
{
$charset = strtolower(trim($charset ?? ''));
foreach (self::$map as $pattern => $spec) {
$re = '/^'.$pattern.'$/D';
if (preg_match($re, $charset)) {
if (!\array_key_exists($pattern, self::$loaded)) {
$reflector = new ReflectionClass($spec['class']);
if ($reflector->getConstructor()) {
$reader = $reflector->newInstanceArgs($spec['constructor']);
} else {
$reader = $reflector->newInstance();
}
self::$loaded[$pattern] = $reader;
}
return self::$loaded[$pattern];
}
}
}
}
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