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|
#!/usr/bin/env perl
use strict;
use warnings;
use 5.014;
use utf8;
use Cache::Memory;
use Encode qw(decode);
use IO::Handle;
use Time::Progress;
use Travel::Status::DE::IRIS;
use Travel::Status::DE::IRIS::Stations;
STDOUT->autoflush(1);
my $now = DateTime->now( time_zone => 'Europe/Berlin' );
binmode( STDOUT, ':encoding(utf-8)' );
@ARGV = map { decode( 'UTF-8', $_ ) } @ARGV;
my ($dest_station, $train_type, $train_no, $max_stations) = @ARGV;
$max_stations //= 20;
my $main_cache = Cache::Memory->new(
namespace => 'IRISMain',
default_expires => '6 hours',
);
my $rt_cache = Cache::Memory->new(
namespace => 'IRISRT',
default_expires => '90 seconds'
);
sub get_train_or_undef {
my ($station, $ignore_errors) = @_;
my @candidates = Travel::Status::DE::IRIS::Stations::get_station($station);
if (@candidates == 1) {
$station = $candidates[0][0];
}
my $status = Travel::Status::DE::IRIS->new(
datetime => $now,
station => $station,
with_related => 0,
main_cache => $main_cache,
realtime_cache => $rt_cache,
lookahead => 300,
);
if (my $err = $status->errstr) {
if ($ignore_errors) {
return undef;
}
else {
say STDERR "Request error at ${station}: ${err}";
exit 1;
}
}
if (my $warn = $status->warnstr and not $ignore_errors) {
say STDERR "Request warning at ${station}: ${warn}";
}
my @res = grep { $_->type eq $train_type and $_->train_no eq $train_no } $status->results;
if (@res == 1) {
return $res[0];
}
return undef;
}
sub get_train_at_next_station_or_undef {
my ($train) = @_;
my @route_next = $train->route_post;
if (not @route_next) {
return (undef, undef);
}
return ($route_next[0], get_train_or_undef($route_next[0]));
}
sub get_train_at_prev_station_or_undef {
my ($train) = @_;
my @route_prev = $train->route_pre;
if (not @route_prev) {
return (undef, undef);
}
return ($route_prev[-1], get_train_or_undef($route_prev[-1]));
}
sub format_datetime {
my ($dt) = @_;
if (not defined $dt) {
return q{};
}
return $dt->strftime('%H:%M');
}
sub format_delay {
my ($delay) = @_;
if (not defined $delay) {
return q{};
}
return sprintf('%+d', $delay);
}
sub update_trainstatus {
my ($train) = @_;
return {
sched_arrival => $train->sched_arrival,
rt_arrival => $train->arrival,
sched_departure => $train->sched_departure,
rt_departure => $train->departure,
cancelled_arrival => $train->arrival_is_cancelled,
cancelled_departure => $train->departure_is_cancelled,
sched_platform => $train->sched_platform,
delay => $train->delay,
arrival_delay => $train->arrival_delay,
departure_delay => $train->departure_delay,
platform => $train->platform,
epoch => ($train->arrival // $train->departure)->epoch,
last_update => DateTime->now(time_zone => 'Europe/Berlin')->epoch,
};
}
my $initial_train = get_train_or_undef($dest_station);
if (not defined $initial_train) {
say STDERR "Did not find $train_type $train_no at $dest_station\n";
say STDERR "Note that its arrival must not be more than 5 hours in the future\n";
}
my @stations = ($initial_train->route_pre, $dest_station);
my @all_messages = $initial_train->messages;
if (@stations > $max_stations) {
splice(@stations, 0, @stations - $max_stations);
}
my %status = (
$dest_station => update_trainstatus($initial_train),
);
my $timer_current = 0;
my $timer_max = @stations;
my $timer = Time::Progress->new(
min => 1,
max => $timer_max,
);
for my $station (@stations) {
print $timer->report(
"\r\e[2KGetting initial departures %20b %p "
. "(${timer_current}/${timer_max}) ${station}",
++$timer_current
);
if (my $train = get_train_or_undef($station, 1)) {
$status{$station} = update_trainstatus($train);
}
else {
$status{$station}{skip} = 1;
}
}
print "\r\e[2K";
while (1) {
my $prev_epoch = 0;
my $now = DateTime->now(time_zone => 'Europe/Berlin');
for my $station (@stations) {
if ($status{$station}{skip}) {
printf("%30s ??:?? → ??:??\n\n", $station);
}
else {
my $epoch = $status{$station}{epoch};
my @messages = grep { $_->[0]->epoch > $prev_epoch and $_->[0]->epoch <= $epoch } @all_messages;
for my $message (@messages) {
printf("%30s %5s %s\n", q{}, $message->[0]->strftime('%H:%M'), $message->[1]);
}
if (@messages) {
print "\n";
}
if ($prev_epoch < $now->epoch and $now->epoch <= $epoch) {
printf("%30s %5s\n\n", '>' x 15, $now->strftime('%H:%M'));
}
printf("%30s %5s → %5s %s\n",
$station, format_datetime($status{$station}{sched_arrival}),
format_datetime($status{$station}{sched_departure}),
format_delay($status{$station}{delay}),
);
if ($status{$station}{arrival_delay} or $status{$station}{departure_delay}) {
printf("%30s %5s → %5s\n",
q{},
format_datetime($status{$station}{rt_arrival}),
format_datetime($status{$station}{rt_departure}),
);
}
print "\n";
$prev_epoch = $epoch;
}
}
sleep(60);
for my $station (@stations) {
if (my $train = get_train_or_undef($station, 1)) {
$status{$station} = update_trainstatus($train);
@all_messages = $train->messages;
}
}
say "\n----\n";
}
|
