Joomla component - b2j_contact - Sender will be the name/email of the sender instead of admin's and subject will get a random number

b2jadminmailer.php

<?php defined('_JEXEC') or die('Restricted access');

/* ------------------------------------------------------------------------
 * Bang2Joom Contact for Joomla 3.0+
 * ------------------------------------------------------------------------
 * Copyright (C) 2011-2013 Bang2Joom. All Rights Reserved.
 * @license - GNU/GPL, http://www.gnu.org/licenses/gpl.html
 * Author: Bang2Joom
 * Websites: http://www.bang2joom.com
  ------------------------------------------------------------------------
 * 
 * See for more information: http://www.bang2joom.com/forum/b2j-contact/1315-how-to-change-subject-or-senders-name-email 
 */

	$inc_dir = realpath(dirname(__FILE__));
	require_once($inc_dir . '/b2jdispatcher.php');

	class B2JAdminMailer extends B2JDispatcher
	{

		public function __construct(&$params, B2JMessageBoard &$messageboard, &$fieldsbuilder)
		{
			parent::__construct($params, $messageboard, $fieldsbuilder);
		}


		protected function LoadFields()
		{
		}


		public function Process()
		{
			$mail = JFactory::getMailer();

			$this->set_from($mail);
			$this->set_to($mail, "to_address", "addRecipient");
			$this->set_to($mail, "cc_address", "addCC");
			$this->set_to($mail, "bcc_address", "addBCC");

			$mail->setSubject(JMailHelper::cleanSubject($this->Params->get("email_subject", "")) . ' - #' . mt_rand(1000, 9999));

			$body = $this->body();
			$body .= $this->attachments($mail);
			$body .= PHP_EOL;

			$body .= $this->Application->getCfg("sitename") . " - " . $this->CurrentURL() . PHP_EOL;

			$body .= "Client: " . $this->ClientIPaddress() . " - " . $_SERVER['HTTP_USER_AGENT'] . PHP_EOL;

			$body = JMailHelper::cleanBody($body);
			$mail->setBody($body);

			$this->Logger->Write("---------------------------------------------------" . PHP_EOL . $body);

			return $this->send($mail);
		}

        private function getSenderEmailCustom($fallback){
            if (isset($this->FieldsBuilder->DynamicFields) and count($this->FieldsBuilder->DynamicFields) > 0){

                $senderArray = array();
                foreach ($this->FieldsBuilder->DynamicFields as $key => $field)
                {
                    if (!$field[0]->state){
                        continue;
                    }
                    foreach ($field[1] as $dynamicfield){
                        if ($dynamicfield->b2jFieldName == 'Email'){
                            $senderArray[0] = $dynamicfield->b2jFieldValue;
                        }

                        if ($dynamicfield->b2jFieldName == 'Name'){
                            $senderArray[1] = $dynamicfield->b2jFieldValue;
                        }
                    }
                }
                return empty($senderArray) ? $fallback : $senderArray;
            }
            return $fallback;
        }


		private function set_from(&$mail)
		{
			$emailhelper = new B2jEmailHelper($this->Params);
			$config = JComponentHelper::getParams("com_b2jcontact");

			$adminemailfrom = $config->get("adminemailfrom");
			$from = $emailhelper->convert($adminemailfrom);
			$mail->setSender($this->getSenderEmailCustom($from));

			//$adminemailreplyto = $config->get("adminemailreplyto");
			$adminemailreplyto = array();
			$adminemailreplyto['name'] = "";
			if (!isset($this->FieldsBuilder->senderEmail->b2jFieldValue) || empty($this->FieldsBuilder->senderEmail->b2jFieldValue)){
				$adminemailreplyto['email'] = "";
			}else{
				$adminemailreplyto['email'] = $this->FieldsBuilder->senderEmail->b2jFieldValue;
			}
			$replyto = $adminemailreplyto;
			//$replyto = $emailhelper->convert($adminemailreplyto);

			$mail->ClearReplyTos();
			$mail->addReplyTo($replyto);
		}


		private function set_to(&$mail, $param_name, $method)
		{
			if ($this->Params->get($param_name, NULL))
				$recipients = explode(",", $this->Params->get($param_name, ""));
			else
				$recipients = array();

			foreach ($recipients as $recipient)
			{
				if (empty($recipient)) continue;
				$mail->$method($recipient);
			}
		}


		protected function attachments(&$mail)
		{
			$result = "";
			$uploadmethod = intval($this->Params->get("uploadmethod", "1")); 

			if (count($this->FileList) && ($uploadmethod & 1)) $result .= JText::_($GLOBALS["COM_NAME"] . "_ATTACHMENTS") . PHP_EOL;
			foreach ($this->FileList as &$file)
			{
				$filename = 'components/' . $GLOBALS["com_name"] . '/uploads/' . $file;
				if ($uploadmethod & 1) $result .= JUri::base() . $filename . PHP_EOL;
				if ($uploadmethod & 2) $mail->addAttachment(JPATH_SITE . "/" . $filename);
			}

			return $result;
		}

	}
?>