#!/usr/bin/env perl
use Mojolicious::Lite;
use Cache::File;
use DateTime;
use DateTime::Format::Strptime;
use App::VRR::Fakedisplay;
use Travel::Status::DE::VRR;
our $VERSION = '0.00';
sub get_results_for {
my ($city, $stop) = @_;
my $cache = Cache::File->new(
cache_root => '/tmp/vrr-fake',
default_expires => '900 sec',
);
my $results = $cache->thaw("${city} _ ${stop}");
if ( not $results ) {
my $status
= Travel::Status::DE::VRR->new(place => $city, name => $stop);
$results = [ [$status->results], $status->errstr ];
$cache->freeze( "${city} _ ${stop}", $results );
}
return @{$results};
}
sub handle_request {
my $self = shift;
my $city = $self->stash('city');
my $stop = $self->stash('stop');
$self->stash( title => 'vrr-fakedisplay' );
$self->stash( version => $VERSION );
$self->stash( params => $self->req->params->to_string);
$self->stash( height => 50 );
$self->stash( width => 180);
$self->render(
'main',
city => $city,
stop => $stop,
version => $VERSION,
title => "departures for ${city} ${stop}",
);
}
sub shorten_destination {
my ($dest, $city) = @_;
$dest =~ s{ ^ $city \s }{}x;
if (length($dest) > 20) {
$dest =~ s{^Dortmund}{DO} or
$dest =~ s{^Duisburg}{DU} or
$dest =~ s{^Düsseldorf}{D} or
$dest =~ s{^Essen}{E} or
$dest =~ s{^Gelsenkirchen}{GE} or
$dest =~ s{^Mülheim}{MH};
}
$dest = substr($dest, 0, 20);
return $dest;
}
sub render_image {
my $self = shift;
my $city = $self->stash('city');
my $stop = $self->stash('stop');
my $dt_now = DateTime->now(time_zone => 'Europe/Berlin');
my $color = $self->param('color') || '255,150,0';
my $width = $self->param('width') || 180;
my $height = $self->param('height') || 50;
my (@grep_line, @grep_platform);
my ($results, $errstr) = get_results_for($city, $stop);
my $png = App::VRR::Fakedisplay->new(width => 180, height => 50, color => [split(qr{,}, $color)]);
my $strp_simple = DateTime::Format::Strptime->new(
pattern => '%H:%M',
time_zone => 'floating',
);
my $strp_full = DateTime::Format::Strptime->new(
pattern => '%d.%m.%Y %H:%M',
time_zone => 'floating',
);
if ($self->param('line')) {
@grep_line = split(qr{,}, $self->param('line'));
}
if ($self->param('platform')) {
@grep_platform = split(qr{,}, $self->param('platform'));
}
$self->res->headers->content_type('image/png');
for my $d (@{$results}) {
my $line = $d->line;
my $platform = (split(qr{ }, $d->platform))[-1];
my $destination = $d->destination;
my $time = $d->time;
my $etr;
my $dt_dep = $strp_full->parse_datetime($time)
// $strp_simple->parse_datetime($time);
my $dt;
if ((@grep_line and not ($line ~~ \@grep_line)) or
(@grep_platform and not ($platform ~~ \@grep_platform))) {
next;
}
if ($time =~ m{ ^ \d\d? : \d\d $ }x) {
$dt = DateTime->new(
year => $dt_now->year,
month => $dt_now->month,
day => $dt_now->day,
hour => $dt_dep->hour,
minute => $dt_dep->minute,
second => $dt_dep->second,
time_zone => 'Europe/Berlin',
);
}
else {
$dt = $dt_dep;
}
my $duration = $dt->subtract_datetime($dt_now);
if ($duration->is_negative) {
next;
}
elsif ($duration->in_units('minutes') == 0) {
$etr = 'sofort';
}
elsif ($duration->in_units('hours') == 0) {
$etr = sprintf(
' %2d',
$duration->in_units('minutes'),
);
}
else {
last;
}
$destination = shorten_destination($destination, $city);
$png->draw_at(0, $line);
$png->draw_at(25, $destination);
$png->draw_at(144, $etr);
if ($etr ne 'sofort') {
$png->draw_at(161, 'min');
}
$png->new_line();
}
$self->render(data => $png->png);
}
get '/_redirect' => sub {
my $self = shift;
my $city = $self->param('city');
my $stop = $self->param('stop');
$self->redirect_to("/${city}/${stop}");
};
get '/' => \&handle_request;
get '/:city/:stop.png' => \&render_image;
get '/:city/:stop' => \&handle_request;
app->start();
__DATA__
@@ main.html.ep
<%= $title %>
% if ($city and $stop) {
% }
% else {
DB-Fakedisplay displays the next departures at a DB station, just like the big
LC display in the station itself.
% }
@@ not_found.html.ep
page not found
page not found