diff options
Diffstat (limited to 'lib')
| -rwxr-xr-x | lib/WWW/Efa.pm | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/lib/WWW/Efa.pm b/lib/WWW/Efa.pm new file mode 100755 index 0000000..3ec8443 --- /dev/null +++ b/lib/WWW/Efa.pm @@ -0,0 +1,225 @@ +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; |