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