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Current File : /usr/share/perl5/Email/Sender/Transport/Maildir.pm
package Email::Sender::Transport::Maildir 2.600;
# ABSTRACT: deliver mail to a maildir on disk

use Moo;
with 'Email::Sender::Transport';

use Errno ();
use Fcntl;
use File::Path 2.06;
use File::Spec;

use Sys::Hostname;

use MooX::Types::MooseLike::Base qw(Bool);

#pod =head1 DESCRIPTION
#pod
#pod This transport delivers into a maildir.  The maildir's location may be given as
#pod the F<dir> argument to the constructor, and defaults to F<Maildir> in the
#pod current directory (at the time of transport initialization).
#pod
#pod If the directory does not exist, it will be created.
#pod
#pod By default, three headers will be added:
#pod
#pod  * X-Email-Sender-From - the envelope sender
#pod  * X-Email-Sender-To   - the envelope recipients (one header per rcpt)
#pod  * Lines               - the number of lines in the body
#pod
#pod These can be controlled with the C<add_lines_header> and
#pod C<add_envelope_headers> constructor arguments.
#pod
#pod The L<Email::Sender::Success> object returned on success has a C<filename>
#pod method that returns the filename to which the message was delivered.
#pod
#pod =cut

{
  package
    Email::Sender::Success::MaildirSuccess;
  use Moo;
  use MooX::Types::MooseLike::Base qw(Str);
  extends 'Email::Sender::Success';
  has filename => (
    is  => 'ro',
    isa => Str,
    required => 1,
  );
  no Moo;
}


my $HOSTNAME;
BEGIN { ($HOSTNAME = hostname) =~ s/\..*//; }
sub _hostname { $HOSTNAME }

my $MAILDIR_TIME    = 0;
my $MAILDIR_COUNTER = 0;

has [ qw(add_lines_header add_envelope_headers) ] => (
  is  => 'ro',
  isa => Bool,
  default => sub { 1 },
);

has dir => (
  is  => 'ro',
  required => 1,
  default  => sub { File::Spec->catdir(File::Spec->curdir, 'Maildir') },
);

sub send_email {
  my ($self, $email, $env) = @_;

  my $dupe = Email::Abstract->new(\do { $email->as_string });

  if ($self->add_envelope_headers) {
    $dupe->set_header('X-Email-Sender-From' =>
      (defined $env->{from} ? $env->{from} : '-'),
    );

    my @to = grep {; defined } @{ $env->{to} };
    $dupe->set_header('X-Email-Sender-To'   => (@to ? @to : '-'));
  }

  $self->_ensure_maildir_exists;

  $self->_add_lines_header($dupe) if $self->add_lines_header;
  $self->_update_time;

  my $fn = $self->_deliver_email($dupe);

  return Email::Sender::Success::MaildirSuccess->new({
    filename => $fn,
  });
}

sub _ensure_maildir_exists {
  my ($self) = @_;

  for my $dir (qw(cur tmp new)) {
    my $subdir = File::Spec->catdir($self->dir, $dir);
    next if -d $subdir;

    Email::Sender::Failure->throw("couldn't create $subdir: $!")
      unless File::Path::make_path($subdir) || -d $subdir;
  }
}

sub _add_lines_header {
  my ($class, $email) = @_;
  return if $email->get_header("Lines");
  my $lines = $email->get_body =~ tr/\n/\n/;
  $email->set_header("Lines", $lines);
}

sub _update_time {
  my $time = time;
  if ($MAILDIR_TIME != $time) {
    $MAILDIR_TIME    = $time;
    $MAILDIR_COUNTER = 0;
  } else {
    $MAILDIR_COUNTER++;
  }
}

sub _deliver_email {
  my ($self, $email) = @_;

  my ($tmp_filename, $tmp_fh) = $self->_delivery_fh;

  # if (eval { $email->can('stream_to') }) {
  #  eval { $mail->stream_to($fh); 1 } or return;
  #} else {
  my $string = $email->as_string;
  $string =~ s/\x0D\x0A/\x0A/g unless $^O eq 'MSWin32';
  print $tmp_fh $string
    or Email::Sender::Failure->throw("could not write to $tmp_filename: $!");

  close $tmp_fh
    or Email::Sender::Failure->throw("error closing $tmp_filename: $!");

  my $target_name = File::Spec->catfile($self->dir, 'new', $tmp_filename);

  my $ok = rename(
    File::Spec->catfile($self->dir, 'tmp', $tmp_filename),
    $target_name,
  );

  Email::Sender::Failure->throw("could not move $tmp_filename from tmp to new")
    unless $ok;

  return $target_name;
}

sub _delivery_fh {
  my ($self) = @_;

  my $hostname = $self->_hostname;

  my ($filename, $fh);
  until ($fh) {
    $filename = join q{.}, $MAILDIR_TIME, $$, ++$MAILDIR_COUNTER, $hostname;
    my $filespec = File::Spec->catfile($self->dir, 'tmp', $filename);
    sysopen $fh, $filespec, O_CREAT|O_EXCL|O_WRONLY;
    binmode $fh;
    Email::Sender::Failure->throw("cannot create $filespec for delivery: $!")
      unless $fh or $!{EEXIST};
  }

  return ($filename, $fh);
}

no Moo;
1;

__END__

=pod

=encoding UTF-8

=head1 NAME

Email::Sender::Transport::Maildir - deliver mail to a maildir on disk

=head1 VERSION

version 2.600

=head1 DESCRIPTION

This transport delivers into a maildir.  The maildir's location may be given as
the F<dir> argument to the constructor, and defaults to F<Maildir> in the
current directory (at the time of transport initialization).

If the directory does not exist, it will be created.

By default, three headers will be added:

 * X-Email-Sender-From - the envelope sender
 * X-Email-Sender-To   - the envelope recipients (one header per rcpt)
 * Lines               - the number of lines in the body

These can be controlled with the C<add_lines_header> and
C<add_envelope_headers> constructor arguments.

The L<Email::Sender::Success> object returned on success has a C<filename>
method that returns the filename to which the message was delivered.

=head1 PERL VERSION

This library should run on perls released even a long time ago.  It should work
on any version of perl released in the last five years.

Although it may work on older versions of perl, no guarantee is made that the
minimum required version will not be increased.  The version may be increased
for any reason, and there is no promise that patches will be accepted to lower
the minimum required perl.

=head1 AUTHOR

Ricardo Signes <cpan@semiotic.systems>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2022 by Ricardo Signes.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=cut

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