CAllMailMessage::addAttachment

static function addAttachment($arFields)
{
	global $DB;

	$arFields['FILE_NAME'] = trim($arFields['FILE_NAME']);

	$strSql = "SELECT ID, MAILBOX_ID, ATTACHMENTS FROM b_mail_message WHERE ID=".intval($arFields["MESSAGE_ID"]);
	$dbr = $DB->Query($strSql, false, "File: ".__FILE__."
Line: ".__LINE__);
	if(!($dbr_arr = $dbr->Fetch()))
		return false;

	$n = intval($dbr_arr["ATTACHMENTS"])+1;
	if (empty($arFields['FILE_NAME']))
	{
		$arFields['FILE_NAME'] = sprintf(
			'%u-%u-%u.%s',
			$dbr_arr['MAILBOX_ID'], $dbr_arr['ID'], $n,
			mb_strpos($arFields['CONTENT_TYPE'], 'message/') === 0 ? 'msg' : 'file'
		);
	}

	if(is_set($arFields, "CONTENT_TYPE"))
		$arFields["CONTENT_TYPE"] = mb_strtolower($arFields["CONTENT_TYPE"]);

	if(mb_strpos($arFields["CONTENT_TYPE"], "image/") === 0 && (!is_set($arFields, "IMAGE_WIDTH") || !is_set($arFields, "IMAGE_HEIGHT")) && is_set($arFields, "FILE_DATA"))
	{
		$filename = CTempFile::GetFileName(md5(uniqid("")).'.tmp');
		CheckDirPath($filename);
		if(file_put_contents($filename, $arFields["FILE_DATA"]) !== false)
		{
			$img_arr = CFile::GetImageSize($filename);
			$arFields["IMAGE_WIDTH"] = $img_arr? $img_arr[0]: 0;
			$arFields["IMAGE_HEIGHT"] = $img_arr? $img_arr[1]: 0;
		}
	}

	if(is_set($arFields, "FILE_DATA") && !is_set($arFields, "FILE_SIZE"))
		$arFields["FILE_SIZE"] = strlen($arFields["FILE_DATA"]);

	$file = array(
		'name'      => md5($arFields['FILE_NAME']),
		'size'      => $arFields['FILE_SIZE'],
		'type'      => $arFields['CONTENT_TYPE'],
		'content'   => $arFields['FILE_DATA'],
		'MODULE_ID' => 'mail'
	);

	if (!($file_id = CFile::saveFile($file, 'mail/attachment')))
	{
		CMail::option('attachment_failure', true);
		return false;
	}

	CMail::option('attachment_failure', false);

	unset($arFields['FILE_DATA']);
	$arFields['FILE_ID'] = $file_id;

	$ID = $DB->add('b_mail_msg_attachment', $arFields);

	if ($ID > 0)
	{
		$strSql = 'UPDATE b_mail_message SET ATTACHMENTS = ' . $n . ' WHERE ID = ' . intval($arFields['MESSAGE_ID']);
		$DB->query($strSql, false, 'File: '.__FILE__.'
Line: '.__LINE__);

		try
		{
			BitrixMailHelperAttachmentStorage::registerAttachment(array(
				'FILE_ID' => $arFields['FILE_ID'],
				'FILE_NAME' => $arFields['FILE_NAME'],
				'FILE_SIZE' => $arFields['FILE_SIZE'],
			));
		}
		catch (Exception $e)
		{
			Application::getInstance()->getExceptionHandler()->writeToLog($e);
		}
	}

	return $ID;
}