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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 LWP::UserAgent;
my $json_str = read_file('stations.json');
my $stations = JSON->new->utf8->decode($json_str);
@{$stations} = sort { $a->{name} cmp $b->{name} } @{$stations};
my $ua = LWP::UserAgent->new();
$ua->env_proxy;
for my $station ( @{$stations} ) {
if ( not $station->{latlong} ) {
say "Requesting location for $station->{name} ...";
my $res = $ua->get(
sprintf( 'https://v5.db.transport.rest/stops/%07d',
$station->{eva} )
);
if ( $res->is_error ) {
say ' transport.rest returned error ' . $res->status_line;
}
else {
my $content = $res->decoded_content;
my $json = JSON->new->utf8->decode($content);
if ( $json and $json->{location} and $json->{location}{latitude} ) {
$station->{latlong} = [ $json->{location}{latitude},
$json->{location}{longitude} ];
}
else {
say ' transport.rest has no location';
}
}
}
}
my $json_out = JSON->new->utf8->canonical->pretty->encode($stations);
write_file( 'stations.json', $json_out );
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