<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Mail
* @subpackage Storage
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id$
*/


/**
* @category Zend
* @package Zend_Mail
* @subpackage Storage
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/

interface Zend_Mail_Part_Interface extends RecursiveIterator
{
/**
* Check if part is a multipart message
*
* @return bool if part is multipart
*/
public function isMultipart();


/**
* Body of part
*
* If part is multipart the raw content of this part with all sub parts is returned
*
* @return string body
* @throws Zend_Mail_Exception
*/
public function getContent();

/**
* Return size of part
*
* @return int size
*/
public function getSize();

/**
* Get part of multipart message
*
* @param int $num number of part starting with 1 for first part
* @return Zend_Mail_Part wanted part
* @throws Zend_Mail_Exception
*/
public function getPart($num);

/**
* Count parts of a multipart part
*
* @return int number of sub-parts
*/
public function countParts();


/**
* Get all headers
*
* The returned headers are as saved internally. All names are lowercased. The value is a string or an array
* if a header with the same name occurs more than once.
*
* @return array headers as array(name => value)
*/
public function getHeaders();

/**
* Get a header in specificed format
*
* Internally headers that occur more than once are saved as array, all other as string. If $format
* is set to string implode is used to concat the values (with Zend_Mime::LINEEND as delim).
*
* @param string $name name of header, matches case-insensitive, but camel-case is replaced with dashes
* @param string $format change type of return value to 'string' or 'array'
* @return string|array value of header in wanted or internal format
* @throws Zend_Mail_Exception
*/
public function getHeader($name, $format = null);

/**
* Get a specific field from a header like content type or all fields as array
*
* If the header occurs more than once, only the value from the first header
* is returned.
*
* Throws a Zend_Mail_Exception if the requested header does not exist. If
* the specific header field does not exist, returns null.
*
* @param string $name name of header, like in getHeader()
* @param string $wantedPart the wanted part, default is first, if null an array with all parts is returned
* @param string $firstName key name for the first part
* @return string|array wanted part or all parts as array($firstName => firstPart, partname => value)
* @throws Zend_Exception, Zend_Mail_Exception
*/
public function getHeaderField($name, $wantedPart = 0, $firstName = 0);


/**
* Getter for mail headers - name is matched in lowercase
*
* This getter is short for Zend_Mail_Part::getHeader($name, 'string')
*
* @see Zend_Mail_Part::getHeader()
*
* @param string $name header name
* @return string value of header
* @throws Zend_Mail_Exception
*/
public function __get($name);

/**
* magic method to get content of part
*
* @return string content
*/
public function __toString();
}