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package WWW::Efa;
use strict;
use warnings;
use 5.010;
use Carp qw/croak confess/;
use XML::LibXML;
use WWW::Mechanize;
my $VERSION = '1.3+git';
sub new {
my ($obj, $post) = @_;
my $ref = {};
my $firsturl
= 'http://efa.vrr.de/vrr/XSLT_TRIP_REQUEST2?language=de&itdLPxx_transpCompany=vrr';
my $posturl = 'http://efa.vrr.de/vrr/XSLT_TRIP_REQUEST2';
$ref->{'mech'} = WWW::Mechanize->new(
autocheck => 1,
);
$ref->{'mech'}->get($firsturl);
$ref->{'mech'}->submit_form(
form_name => 'jp',
fields => $post,
);
# XXX (workaround)
# The content actually is iso-8859-1. But HTML::Message doesn't actually
# decode character strings when they have that encoding. However, it
# doesn't check for latin-1, which is an alias for iso-8859-1.
$ref->{'html_reply'} = $ref->{'mech'}->response()->decoded_content(
charset => 'latin-1'
);
return bless($ref, $obj);
}
sub new_from_html {
my ($obj, $html) = @_;
my $ref = {};
$ref->{'html_reply'} = $html;
return bless($ref, $obj);
}
sub parse_initial {
my ($tree) = @_;
my $con_part = 0;
my $con_no;
my $cons;
my $xp_td = XML::LibXML::XPathExpression->new('//table//table/tr/td');
my $xp_img = XML::LibXML::XPathExpression->new('./img');
foreach my $td (@{$tree->findnodes($xp_td)}) {
my $colspan = $td->getAttribute('colspan') // 0;
my $class = $td->getAttribute('class') // q{};
if ( $colspan != 8 and $class !~ /^bgColor2?$/ ) {
next;
}
if ($colspan == 8) {
if ($td->textContent() =~ / (?<no> \d+ ) \. .+ Fahrt /x) {
$con_no = $+{'no'} - 1;
$con_part = 0;
next;
}
}
if ($class =~ /^bgColor2?$/) {
if ($class eq 'bgColor' and ($con_part % 2) == 1) {
$con_part++;
}
elsif ($class eq 'bgColor2' and ($con_part % 2) == 0) {
$con_part++;
}
}
if (
defined $con_no and not $td->exists($xp_img)
and $td->textContent() !~ /^\s*$/
)
{
push(@{$cons->[$con_no]->[$con_part]}, $td->textContent());
}
}
if (defined $con_no) {
return $cons;
}
else {
confess('efa.vrr.de returned no connections, check your input data');
}
}
sub parse_pretty {
my ($con_parts) = @_;
my $elements;
my @next_extra;
for my $con (@{$con_parts}) {
my $hash;
# Note: Changes @{$con} elements
foreach my $str (@{$con}) {
$str =~ s/[\s\n\t]+/ /gs;
$str =~ s/^ //;
$str =~ s/ $//;
}
if (@{$con} < 5) {
@next_extra = @{$con};
next;
}
# @extra may contain undef values
foreach my $extra (@next_extra) {
if ($extra) {
push(@{$hash->{'extra'}}, $extra);
}
}
@next_extra = undef;
if ($con->[0] !~ / \d{2} : \d{2} /ox) {
splice(@{$con}, 0, 0, q{});
splice(@{$con}, 4, 0, q{});
$con->[7] = q{};
}
elsif ($con->[4] =~ / Plan: \s ab /ox) {
push(@{$hash->{'extra'}}, splice(@{$con}, 4, 1));
}
foreach my $extra (splice(@{$con}, 8, -1)) {
push (@{$hash->{'extra'}}, $extra);
}
$hash->{'dep_time'} = $con->[0];
# always "ab" $con->[1];
$hash->{'dep_stop'} = $con->[2];
$hash->{'train_line'} = $con->[3];
$hash->{'arr_time'} = $con->[4];
# always "an" $con->[5];
$hash->{'arr_stop'} = $con->[6];
$hash->{'train_dest'} = $con->[7];
push(@{$elements}, $hash);
}
return($elements);
}
sub parse {
my ($self) = @_;
my $tree = XML::LibXML->load_html(
string => $self->{'html_reply'},
);
my $raw_cons = parse_initial($tree);
for my $raw_con (@{$raw_cons}) {
push(@{$self->{'connections'}}, parse_pretty($raw_con));
}
$self->{'tree'} = $tree;
}
sub check_ambiguous {
my ($self) = @_;
my $ambiguous = 0;
my $tree = $self->{'tree'};
my $xp_select = XML::LibXML::XPathExpression->new('//select');
my $xp_option = XML::LibXML::XPathExpression->new('./option');
foreach my $select (@{$tree->findnodes($xp_select)}) {
$ambiguous = 1;
printf {*STDERR} (
"Ambiguous input for %s\n",
$select->getAttribute('name'),
);
foreach my $val ($select->findnodes($xp_option)) {
print {*STDERR} "\t";
say {*STDERR} $val->textContent();
}
}
if ($ambiguous) {
exit 1;
}
}
sub check_no_connections {
my ($self) = @_;
my $tree = $self->{'tree'};
my $xp_err_img = XML::LibXML::XPathExpression->new(
'//td/img[@src="images/ausrufezeichen.jpg"]');
my $err_node = $tree->findnodes($xp_err_img)->[0];
if ($err_node) {
say {*STDERR} 'Looks like efa.vrr.de showed an error.';
say {*STDERR} 'I will now try to dump the error message:';
say {*STDERR} $err_node->parentNode()->parentNode()->textContent();
exit 2;
}
}
sub connections {
my ($self) = @_;
return(@{$self->{'connections'}});
}
1;
|
