adding send email function to backend

/**
	 * Send mail to administrators
	 *
	 * @param   integer  $id  The id of the row to check out.
	 *
	 * @return void
	 */
	public function sendSystemMail($id)
	{
		// Get the id.
		$id = (!empty($id)) ? $id : (int) $this->getState('newsitem.id');

		$app = JFactory::getApplication('com_ochgotnews');
		$params = $app->getParams();

		if ($params->get('ochgotnews_mailonnew', true))
		{
			$user = JFactory::getUser();

			// Build the email subject and message
			$sitename = JFactory::getApplication()->get('sitename');
			$siteURL = JUri::root() . 'administrator/index.php?option=com_ochgotnews&task=newsitem.edit&id=' . $id;
			$subject = JText::sprintf('COM_OCHGOTNEWS_MAIL_SUBJECT', $sitename);
			$msg = JText::sprintf('COM_OCHGOTNEWS_MAIL_MESSAGE', $siteURL);

			// Get the user that are configured to receive system emails
			$db = JFactory::getDBO();
			$query = $db->getQuery(true);
			$query
				->select(array('name', 'email'))
				->from($db->quoteName('#__users'))
				->where($db->quotename('sendEmail') . ' = ' . $db->quote('1'));
			$db->setQuery($query);
			$recipients = $db->loadObjectList();

			foreach ($recipients as $recipient)
			{
				// Compile mailer function:
				$mailer = JFactory::getMailer()
				->setSubject($subject)
				->setBody($msg)
				->setSender(
					$user->email,
					$user->name
					)
				->addRecipient(
					$recipient->email,
					$recipient->name
					);

				$mailer->Send();
			}
		}
	}