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<?php
/* --------------------------------------------------------------
   MailerAdapter.inc.php 2015-07-20 gm
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2015 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

MainFactory::load_class('MailerAdapterInterface');

/**
 * Class MailerAdapter
 *
 * This class provides a communication layer with the external mailing library
 * in order to isolate the library-specific code.
 *
 * @category System
 * @package  Email
 */
class MailerAdapter implements MailerAdapterInterface
{
    /**
     * PHPMailer Instance
     *
     * @var PHPMailer
     */
    protected $mailer;
    
    /**
     * Used for punycode encoding.
     *
     * @var TrueBV\Punycode
     */
    protected $punycode;
    
    /**
     * @var bool
     */
    protected $useHtmlMail;
    
    
    /**
     * Class Constructor
     *
     * @param PHPMailer       $mailer   PHPMailer instance.
     * @param TrueBV\Punycode $punycode Punycode encoder instance.
     * @param \BoolType       $useHtmlMail
     */
    public function __construct(PHPMailer $mailer, TrueBV\Punycode $punycode, \BoolType $useHtmlMail = null)
    {
        $this->mailer      = $mailer;
        $this->punycode    = $punycode;
        $this->useHtmlMail = $useHtmlMail ? $useHtmlMail->asBool() : false;
    }
    
    
    /**
     * Sends a single email.
     *
     * @param EmailInterface $email Contains email information.
     *
     * @throws Exception If mailer library fails to send the email.
     */
    public function send(EmailInterface $email)
    {
        $mail = clone $this->mailer;
        
        // Set Email Sender Contact
        $mail->From     = $this->punycode->encode((string)$email->getSender()->getEmailAddress());
        $mail->FromName = (string)$email->getSender()->getContactName();
        
        // Set Email Recipient Contact
        $mail->addAddress($this->punycode->encode((string)$email->getRecipient()->getEmailAddress()),
                          (string)$email->getRecipient()->getContactName());
        
        // Set Email Reply To Contact
        if($email->getReplyTo() !== null)
        {
            $mail->addReplyTo($this->punycode->encode((string)$email->getReplyTo()->getEmailAddress()),
                              (string)$email->getReplyto()->getContactName());
        }
        
        // Set Email BCC Contacts
        foreach($email->getBcc()->getArray() as $contact)
        {
            $mail->addBCC($this->punycode->encode((string)$contact->getEmailAddress()),
                          (string)$contact->getContactName());
        }
        
        // Set Email CC Contacts
        foreach($email->getBcc()->getArray() as $contact)
        {
            $mail->addCC($this->punycode->encode((string)$contact->getEmailAddress()),
                         (string)$contact->getContactName());
        }
        
        // Set Email Attachments
        foreach($email->getAttachments()->getArray() as $attachment)
        {
            $attachmentPath = (string)$attachment->getPath();
            if(!file_exists($attachmentPath) || !is_file($attachmentPath))
            {
                throw new AttachmentNotFoundException('Attachment file does not exist or is not a file: '
                                                      . $attachmentPath, $attachmentPath);
            }
            
            $mail->addAttachment((string)$attachment->getPath(), (string)$attachment->getName());
        }
        
        // Set Email Subject and Content
        $mail->Subject = (string)$email->getSubject();
        
        if($this->useHtmlMail)
        {
            $mail->IsHTML(true);
            $mail->Body    = (string)$email->getContentHtml();
            $mail->AltBody = (string)$email->getContentPlain();
        }
        else
        {
            $mail->isHTML(false);
            $mail->Body = (string)$email->getContentPlain();
        }
        
        // Empty mail body validation check. PHPMailer will not send mails without content.
        if($mail->Body === '')
        {
            $mail->Body = PHP_EOL;
        }
        
        // Send Email
        if(!$mail->send())
        {
            throw new Exception('Mailer library could not send email: ' . $mail->ErrorInfo);
        }
    }
}