package Sisimai::Reason::SystemError;
use feature ':5.10';
use strict;
use warnings;

sub text  { 'systemerror' }
sub description { 'Email returned due to system error on the remote host' }
sub match {
    # Try to match that the given text and regular expressions
    # @param    [String] argv1  String to be matched with regular expressions
    # @return   [Integer]       0: Did not match
    #                           1: Matched
    # @since v4.0.0
    my $class = shift;
    my $argv1 = shift // return undef;
    my $index = [
        "can't create user output file",
        'could not load drd for domain',
        'internal error reading data',  # Microsoft
        'internal server error: operation now in progress', # Microsoft
        'interrupted system call',
        'it encountered an error while being processed',
        'it would create a mail loop',
        'local configuration error',
        'local error in processing',
        'loop was found in the mail exchanger',
        'loops back to myself',
        'mail system configuration error',
        'server configuration error',
        'service currently unavailable',
        'system config error',
        'temporary local problem',
        'timeout waiting for input',
    ];

    return 1 if grep { rindex($argv1, $_) > -1 } @$index;
    return 0;
}

sub true {
    # The bounce reason is system error or not
    # @param    [Sisimai::Data] argvs   Object to be detected the reason
    # @return   [Integer]               1: is system error
    #                                   0: is not system error
    # @see http://www.ietf.org/rfc/rfc2822.txt
    return undef;
}

1;
__END__

=encoding utf-8

=head1 NAME

Sisimai::Reason::SystemError - Bounce reason is C<systemerror> or not.

=head1 SYNOPSIS

    use Sisimai::Reason::SystemError;
    print Sisimai::Reason::SystemError->match('5.3.5 System config error'); # 1

=head1 DESCRIPTION

Sisimai::Reason::SystemError checks the bounce reason is C<systemerror> or not.
This class is called only Sisimai::Reason class.

This is the error that an email has bounced due to system error on the remote
host such as LDAP connection failure or other internal system error.

    <kijitora@example.net>: 
    Unable to contact LDAP server. (#4.4.3)I'm not going to try again; this
    message has been in the queue too long.

=head1 CLASS METHODS

=head2 C<B<text()>>

C<text()> returns string: C<systemerror>.

    print Sisimai::Reason::SystemError->text;  # systemerror

=head2 C<B<match(I<string>)>>

C<match()> returns 1 if the argument matched with patterns defined in this class.

    print Sisimai::Reason::SystemError->match('5.3.5 System config error'); # 1

=head2 C<B<true(I<Sisimai::Data>)>>

C<true()> returns 1 if the bounce reason is C<systemerror>. The argument must be
Sisimai::Data object and this method is called only from Sisimai::Reason class.

=head1 AUTHOR

azumakuniyuki

=head1 COPYRIGHT

Copyright (C) 2014-2018 azumakuniyuki, All rights reserved.

=head1 LICENSE

This software is distributed under The BSD 2-Clause License.

=cut