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package Travel::Status::DE::HAFAS::StopFinder;
use strict;
use warnings;
use 5.014;
use utf8;
no if $] >= 5.018, warnings => 'experimental::smartmatch';
use Carp qw(confess);
use Encode qw(decode);
use JSON;
use LWP::UserAgent;
our $VERSION = '2.03';
sub new {
my ( $obj, %conf ) = @_;
my $lang = $conf{language} // 'd';
my $ua = $conf{ua};
if ( not $ua ) {
my %lwp_options = %{ $conf{lwp_options} // { timeout => 10 } };
$ua = LWP::UserAgent->new(%lwp_options);
$ua->env_proxy;
}
my $reply;
if ( not $conf{input} ) {
confess('You need to specify an input value');
}
if ( not $conf{url} ) {
confess('You need to specify a URL');
}
my $ref = {
developer_mode => $conf{developer_mode},
post => {
getstop => 1,
REQ0JourneyStopsS0A => 255,
REQ0JourneyStopsS0G => $conf{input},
},
};
bless( $ref, $obj );
my $url = $conf{url} . "/${lang}n";
$reply = $ua->post( $url, $ref->{post} );
if ( $reply->is_error ) {
$ref->{errstr} = $reply->status_line;
return $ref;
}
$ref->{raw_reply} = $reply->decoded_content;
$ref->{raw_reply} =~ s{ ^ SLs [.] sls = }{}x;
$ref->{raw_reply} =~ s{ ; SLs [.] showSuggestion [(] [)] ; $ }{}x;
if ( $ref->{developer_mode} ) {
say $ref->{raw_reply};
}
$ref->{json} = from_json( $ref->{raw_reply} );
return $ref;
}
sub errstr {
my ($self) = @_;
return $self->{errstr};
}
sub results {
my ($self) = @_;
$self->{results} = [];
for my $result ( @{ $self->{json}->{suggestions} } ) {
if ( $result->{typeStr} eq '[Bhf/Hst]' ) {
push(
@{ $self->{results} },
{
name => decode( 'iso-8859-15', $result->{value} ),
id => $result->{extId}
}
);
}
}
return @{ $self->{results} };
}
1;
__END__
=head1 NAME
Travel::Status::DE::HAFAS::StopFinder - Interface to HAFAS-based online stop
finder services
=head1 SYNOPSIS
use Travel::Status::DE::HAFAS::StopFinder;
my $sf = Travel::Status::DE::HAFAS::StopFinder->new(
url => 'http://reiseauskunft.bahn.de/bin/ajax-getstop.exe',
input => 'Borbeck',
);
if (my $err = $sf->errstr) {
die("Request error: ${err}\n");
}
for my $candidate ($sf->results) {
printf("%s (%s)\n", $candidate->{name}, $candidate->{id});
}
=head1 VERSION
version 2.03
=head1 DESCRIPTION
Travel::Status::DE::HAFAS::StopFinder is an interface to the stop finder
service of HAFAS based arrival/departure monitors, for instance the one
available at L<http://reiseauskunft.bahn.de/bin/ajax-getstop.exe/dn>.
It takes a string (usually a location or station name) and reports all
stations and stops which are lexically similar to it.
=head1 METHODS
=over
=item my $stopfinder = Travel::Status::DE::HAFAS::StopFinder->new(I<%opts>)
Looks up stops as specified by I<opts> and teruns a new
Travel::Status::DE::HAFAS::StopFinder element with the results. Dies if the
wrong I<opts> were passed.
Supported I<opts> are:
=over
=item B<input> => I<string>
string to look up, e.g. "Borbeck" or "Koeln Bonn Flughafen". Mandatory.
=item B<url> => I<url>
Base I<url> of the stop finder service, without the language and mode
suffix ("/dn" and similar). Mandatory. See Travel::Status::DE::HAFAS(3pm)'s
B<get_services> method for a list of URLs.
=item B<language> => I<language>
Set language. Accepted arguments are B<d>eutsch, B<e>nglish, B<i>talian and
B<n> (dutch), depending on the used service.
It is unknown if this option has any effect.
=item B<lwp_options> => I<\%hashref>
Passed on to C<< LWP::UserAgent->new >>. Defaults to C<< { timeout => 10 } >>,
you can use an empty hashref to override it.
=back
=item $status->errstr
In case of an error in the HTTP request, returns a string describing it. If
no error occurred, returns undef.
=item $status->results
Returns a list of stop candidates. Each list element is a hash reference. The
hash keys are B<id> (IBNR / UIC station code) and B<name> (stop name). Both can
be used as input for the Travel::Status::DE::HAFAS(3pm) constructor.
If no matching results were found or the parser / http request failed, returns
the empty list.
=back
=head1 DIAGNOSTICS
None.
=head1 DEPENDENCIES
=over
=item * LWP::UserAgent(3pm)
=item * JSON(3pm)
=back
=head1 BUGS AND LIMITATIONS
Unknown.
=head1 SEE ALSO
Travel::Status::DE::HAFAS(3pm).
=head1 AUTHOR
Copyright (C) 2015-2017 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>
=head1 LICENSE
This module is licensed under the same terms as Perl itself.
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