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<?php defined('_JEXEC') or die;
/**
 * @package   Fox Contact for Joomla
 * @copyright Copyright (c) Fox Labs, all rights reserved.
 * @license   Distributed under the terms of the GNU General Public License GNU/GPL v3 http://www.gnu.org/licenses/gpl-3.0.html
 * @see       Documentation: http://www.fox.ra.it/forum/2-documentation.html
 */

class Swift_Mime_SimpleHeaderSet implements Swift_Mime_HeaderSet
{
	private $_factory;
	private $_headers = array();
	private $_order = array();
	private $_required = array();
	private $_charset;
	
	public function __construct(Swift_Mime_HeaderFactory $factory, $charset = null)
	{
		$this->_factory = $factory;
		if (isset($charset))
		{
			$this->setCharset($charset);
		}
	
	}
	
	
	public function setCharset($charset)
	{
		$this->_charset = $charset;
		$this->_factory->charsetChanged($charset);
		$this->_notifyHeadersOfCharset($charset);
	}
	
	
	public function addMailboxHeader($name, $addresses = null)
	{
		$this->_storeHeader($name, $this->_factory->createMailboxHeader($name, $addresses));
	}
	
	
	public function addDateHeader($name, $timestamp = null)
	{
		$this->_storeHeader($name, $this->_factory->createDateHeader($name, $timestamp));
	}
	
	
	public function addTextHeader($name, $value = null)
	{
		$this->_storeHeader($name, $this->_factory->createTextHeader($name, $value));
	}
	
	
	public function addParameterizedHeader($name, $value = null, $params = array())
	{
		$this->_storeHeader($name, $this->_factory->createParameterizedHeader($name, $value, $params));
	}
	
	
	public function addIdHeader($name, $ids = null)
	{
		$this->_storeHeader($name, $this->_factory->createIdHeader($name, $ids));
	}
	
	
	public function addPathHeader($name, $path = null)
	{
		$this->_storeHeader($name, $this->_factory->createPathHeader($name, $path));
	}
	
	
	public function has($name, $index = 0)
	{
		$lowerName = strtolower($name);
		if (!array_key_exists($lowerName, $this->_headers))
		{
			return false;
		}
		
		if (func_num_args() < 2)
		{
			return (bool) count($this->_headers[$lowerName]);
		}
		
		return array_key_exists($index, $this->_headers[$lowerName]);
	}
	
	
	public function set(Swift_Mime_Header $header, $index = 0)
	{
		$this->_storeHeader($header->getFieldName(), $header, $index);
	}
	
	
	public function get($name, $index = 0)
	{
		$name = strtolower($name);
		if (func_num_args() < 2)
		{
			if ($this->has($name))
			{
				$values = array_values($this->_headers[$name]);
				return array_shift($values);
			}
		
		}
		else
		{
			if ($this->has($name, $index))
			{
				return $this->_headers[$name][$index];
			}
		
		}
	
	}
	
	
	public function getAll($name = null)
	{
		if (!isset($name))
		{
			$headers = array();
			foreach ($this->_headers as $collection)
			{
				$headers = array_merge($headers, $collection);
			}
			
			return $headers;
		}
		
		$lowerName = strtolower($name);
		if (!array_key_exists($lowerName, $this->_headers))
		{
			return array();
		}
		
		return $this->_headers[$lowerName];
	}
	
	
	public function listAll()
	{
		$headers = $this->_headers;
		if ($this->_canSort())
		{
			uksort($headers, array($this, '_sortHeaders'));
		}
		
		return array_keys($headers);
	}
	
	
	public function remove($name, $index = 0)
	{
		$lowerName = strtolower($name);
		unset($this->_headers[$lowerName][$index]);
	}
	
	
	public function removeAll($name)
	{
		$lowerName = strtolower($name);
		unset($this->_headers[$lowerName]);
	}
	
	
	public function newInstance()
	{
		return new self($this->_factory);
	}
	
	
	public function defineOrdering(array $sequence)
	{
		$this->_order = array_flip(array_map('strtolower', $sequence));
	}
	
	
	public function setAlwaysDisplayed(array $names)
	{
		$this->_required = array_flip(array_map('strtolower', $names));
	}
	
	
	public function charsetChanged($charset)
	{
		$this->setCharset($charset);
	}
	
	
	public function toString()
	{
		$string = '';
		$headers = $this->_headers;
		if ($this->_canSort())
		{
			uksort($headers, array($this, '_sortHeaders'));
		}
		
		foreach ($headers as $collection)
		{
			foreach ($collection as $header)
			{
				if ($this->_isDisplayed($header) || $header->getFieldBody() != '')
				{
					$string .= $header->toString();
				}
			
			}
		
		}
		
		return $string;
	}
	
	
	public function __toString()
	{
		return $this->toString();
	}
	
	
	private function _storeHeader($name, Swift_Mime_Header $header, $offset = null)
	{
		if (!isset($this->_headers[strtolower($name)]))
		{
			$this->_headers[strtolower($name)] = array();
		}
		
		if (!isset($offset))
		{
			$this->_headers[strtolower($name)][] = $header;
		}
		else
		{
			$this->_headers[strtolower($name)][$offset] = $header;
		}
	
	}
	
	
	private function _canSort()
	{
		return count($this->_order) > 0;
	}
	
	
	private function _sortHeaders($a, $b)
	{
		$lowerA = strtolower($a);
		$lowerB = strtolower($b);
		$aPos = array_key_exists($lowerA, $this->_order) ? $this->_order[$lowerA] : -1;
		$bPos = array_key_exists($lowerB, $this->_order) ? $this->_order[$lowerB] : -1;
		if (-1 === $aPos && -1 === $bPos)
		{
			return $a > $b ? -1 : 1;
		}
		
		if ($aPos == -1)
		{
			return 1;
		}
		elseif ($bPos == -1)
		{
			return -1;
		}
		
		return $aPos < $bPos ? -1 : 1;
	}
	
	
	private function _isDisplayed(Swift_Mime_Header $header)
	{
		return array_key_exists(strtolower($header->getFieldName()), $this->_required);
	}
	
	
	private function _notifyHeadersOfCharset($charset)
	{
		foreach ($this->_headers as $headerGroup)
		{
			foreach ($headerGroup as $header)
			{
				$header->setCharset($charset);
			}
		
		}
	
	}
	
	
	public function __clone()
	{
		$this->_factory = clone $this->_factory;
		foreach ($this->_headers as $groupKey => $headerGroup)
		{
			foreach ($headerGroup as $key => $header)
			{
				$this->_headers[$groupKey][$key] = clone $header;
			}
		
		}
	
	}

}

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