<?php

final class FileCreateMailReceiver extends PhabricatorMailReceiver {

  public function isEnabled() {
    $app_class = 'PhabricatorFilesApplication';
    return PhabricatorApplication::isClassInstalled($app_class);
  }

  public function canAcceptMail(PhabricatorMetaMTAReceivedMail $mail) {
    $config_key = 'metamta.files.public-create-email';
    $create_address = PhabricatorEnv::getEnvConfig($config_key);
    if (!$create_address) {
      return false;
    }

    foreach ($mail->getToAddresses() as $to_address) {
      if ($this->matchAddresses($create_address, $to_address)) {
        return true;
      }
    }

    return false;
  }

  protected function processReceivedMail(
    PhabricatorMetaMTAReceivedMail $mail,
    PhabricatorUser $sender) {

    $attachment_phids = $mail->getAttachments();
    if (empty($attachment_phids)) {
      throw new PhabricatorMetaMTAReceivedMailProcessingException(
        MetaMTAReceivedMailStatus::STATUS_UNHANDLED_EXCEPTION,
        'Ignoring email to create files that did not include attachments.');
    }
    $first_phid = head($attachment_phids);
    $mail->setRelatedPHID($first_phid);

    $attachment_count = count($attachment_phids);
    if ($attachment_count > 1) {
      $subject = pht('You successfully uploaded %d files.', $attachment_count);
    } else {
      $subject = pht('You successfully uploaded a file.');
    }
    $subject_prefix =
      PhabricatorEnv::getEnvConfig('metamta.files.subject-prefix');

    $file_uris = array();
    foreach ($attachment_phids as $phid) {
      $file_uris[] =
        PhabricatorEnv::getProductionURI('/file/info/'.$phid.'/');
    }

    $body = new PhabricatorMetaMTAMailBody();
    $body->addRawSection($subject);
    $body->addTextSection(pht('FILE LINKS'), implode("\n", $file_uris));

    id(new PhabricatorMetaMTAMail())
      ->addTos(array($sender->getPHID()))
      ->setSubject($subject)
      ->setSubjectPrefix($subject_prefix)
      ->setFrom($sender->getPHID())
      ->setRelatedPHID($first_phid)
      ->setBody($body->render())
      ->saveAndSend();
  }

}