/**
* Builds a raw email message by the given parameters
*
* @param string[] $to The array of recipients
* @param string $subject The subject of the email
* @param string $plain The Plain text version of the email
* @param string $html The HTML version of the email
* @param Attachment[] $attachments The array of attachments to send
* @return string The built raw email
* @throws RawEmailException
*/
public function build(array $to, $subject, $plain, $html, array $attachments = array())
{
if (!self::isPresent($plain) && !self::isPresent($html)) {
throw new RawEmailException("Either 'plain' or 'html' parameter must be passed");
}
$outerBoundary = new Boundary(Boundary::generate());
$innerBoundary = new Boundary(Boundary::generate());
$content = new ContentBuilder();
$basic = new Item();
$basic->addField(new Field(Field::RETURN_PATH, array($this->returnPath)));
$basic->addField(new Field(Field::FROM, array($this->from)));
$basic->addField(new Field(Field::TO, array(join(', ', $to))));
$basic->addField(new Field(Field::SUBJECT, array($subject)));
$basic->addField(new Field(Field::MIME_VERSION, array('1.0')));
$basic->addField(new Field(Field::CONTENT_TYPE, array('multipart/mixed', "boundary={$outerBoundary->getBoundary()}")));
$content->insertItem($basic);
$content->insertBoundary($outerBoundary);
$message = new Item();
$message->addField(new Field(Field::CONTENT_TYPE, array('multipart/alternative', "boundary={$innerBoundary->getBoundary()}")));
$content->insertItem($message);
if (self::isPresent($plain)) {
$content->insertBoundary($innerBoundary);
$plainItem = new Item();
$plainItem->addField(new Field(Field::CONTENT_TRANSFER_ENCODING, array('base64')));
$plainItem->addField(new Field(Field::CONTENT_TYPE, array('text/plain', 'charset=UTF-8', 'format=flowed')));
$plainItem->setValue(base64_encode($plain));
$content->insertItem($plainItem);
}
if (self::isPresent($html)) {
$content->insertBoundary($innerBoundary);
$htmlItem = new Item();
$htmlItem->addField(new Field(Field::CONTENT_TRANSFER_ENCODING, array('7bit')));
$htmlItem->addField(new Field(Field::CONTENT_TYPE, array('text/html', 'charset=UTF-8')));
$htmlItem->setValue($html);
$content->insertItem($htmlItem);
}
$content->closeBoundary($innerBoundary);
foreach ($attachments as $attachment) {
$content->insertBoundary($outerBoundary);
$item = new Item();
$item->addField(new Field(Field::CONTENT_DISPOSITION, array('attachment', "filename=\"{$attachment->getName()}\"")));
$item->addField(new Field(Field::CONTENT_TYPE, array($attachment->getContentType(), "name=\"{$attachment->getName()}\"")));
$item->addField(new Field(Field::CONTENT_TRANSFER_ENCODING, array('base64')));
$item->setValue($attachment->getBody());
$content->insertItem($item);
}
$content->closeBoundary($outerBoundary);
return $content->getOutput();
}
