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#!/usr/bin/env perl
use strict;
use warnings;
use 5.010;
use File::Slurp qw(read_file write_file);
use JSON;
use List::Util qw(any);
use XML::LibXML;
my $json_str = read_file('stations.json');
my %known_eva;
for my $station ( @{ JSON->new->utf8->decode($json_str) } ) {
$known_eva{ $station->{eva} } = 1;
}
# Norddeich and Norddeich Mole are illegaly coupled in the backend (they are
# different stations with different departure times). Ignore their EVA IDs.
delete $known_eva{8007768};
delete $known_eva{8004449};
# same goes for Essen-Dellwig / Essen-Dellwig Ost
delete $known_eva{8001903};
delete $known_eva{8001904};
my $xml_str = read_file('stations.xml');
my $tree = XML::LibXML->load_xml( string => $xml_str );
my %meta;
for my $station ( $tree->findnodes('//station') ) {
my $eva = $station->getAttribute('eva');
my $meta = $station->getAttribute('meta');
if ( $known_eva{$eva} and $meta ) {
for my $ref ( split( qr{[|]}, $meta ) ) {
if ( $known_eva{$ref} ) {
push( @{ $meta{$eva} }, 0 + $ref );
}
else {
say "Note: Ignoring $eva -> $ref (unknown)";
}
}
}
}
my $json_out = JSON->new->utf8->canonical->pretty->encode( {%meta} );
write_file( 'meta.json', $json_out );
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