File Coverage

lib/Sisimai/Lhost/X1.pm

Criterion	Covered	Total	%
statement	45	48	93.7
branch	20	22	90.9
condition	7	9	77.7
subroutine	6	6	100.0
pod	2	2	100.0
total	80	87	91.9

package Sisimai::Lhost::X1;
use parent 'Sisimai::Lhost';
use v5.26;
use strict;
use warnings;

sub description { 'Unknown MTA #1' }
sub inquire {
    # Detect an error from Unknown MTA #1
    # @param    [Hash] mhead    Message headers of a bounce email
    # @param    [String] mbody  Message body of a bounce email
    # @return   [Hash]          Bounce data list and message/rfc822 part
    # @return   [undef]         failed to decode or the arguments are missing
    # @since v4.1.3
    my $class = shift;
    my $mhead = shift // return undef;
    my $mbody = shift // return undef;

    my $proceedsto = 0;
       $proceedsto = 1 if index($mhead->{'subject'}, 'Returned Mail: ') == 0;
       $proceedsto = 1 if index($mhead->{'subject'}, 'Mail Delivery Failure') == 0;
       $proceedsto = 1 if Sisimai::String->aligned(\$mhead->{'from'}, ['"Mail Deliver', 'System" ']);
    return undef unless $proceedsto;

    state $indicators = __PACKAGE__->INDICATORS;
    state $boundaries = ['Content-Type: message/rfc822', 'Received: from '];
    state $markingsof = {'message' => ['The original message was received at ']};

    my $dscontents = [__PACKAGE__->DELIVERYSTATUS]; my $v = undef;
    my $emailparts = Sisimai::RFC5322->part($mbody, $boundaries);
    my $readcursor = 0;     # (Integer) Points the current cursor position
    my $recipients = 0;     # (Integer) The number of 'Final-Recipient' header
    my $datestring = '';    # (String) Date string

    for my $e ( split("\n", $emailparts->[0]) ) {
        # Read error messages and delivery status lines from the head of the email to the previous
        # line of the beginning of the original message.
        unless( $readcursor ) {
            # Beginning of the bounce message or message/delivery-status part
            $readcursor |= $indicators->{'deliverystatus'} if index($e, $markingsof->{'message'}->[0]) == 0;
            next;
        }
        next if ($readcursor & $indicators->{'deliverystatus'}) == 0 || $e eq "";

        # The original message was received at Thu, 29 Apr 2010 23:34:45 +0900 (JST)
        # from [e-mail]
        #
        # ---The following addresses had delivery errors---
        #
        # [e-mail] [User unknown]
        $v = $dscontents->[-1];

        if( Sisimai::String->aligned(\$e, ['@', ' [', ']']) ) {
            # [e-mail] [User unknown]
            if( $v->{'recipient'} ) {
                # There are multiple recipient addresses in the message body.
                push @$dscontents, __PACKAGE__->DELIVERYSTATUS;
                $v = $dscontents->[-1];
            }
            my $p1 = index($e, ' ');
            my $p2 = index($e, ']');
            $v->{'recipient'} = substr($e, 0, $p1);
            $v->{'diagnosis'} = substr($e, $p1 + 2, $p2 - $p1 - 2);
            $recipients++;

        } elsif( index($e, $markingsof->{'message'}->[0]) == 0 ) {
            # The original message was received at Thu, 29 Apr 2010 23:34:45 +0900 (JST)
            $datestring = substr($e, length $markingsof->{'message'}->[0],);
        }
    }
    return undef unless $recipients;

    $_->{'date'} = $datestring || '' for @$dscontents;
    return {"ds" => $dscontents, "rfc822" => $emailparts->[1]};
}

1;
__END__