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authorDaniel Friesel <derf@finalrewind.org>2022-01-28 21:58:12 +0100
committerDaniel Friesel <derf@finalrewind.org>2022-01-28 21:58:12 +0100
commit37c0aa5bb513da2cb6de7f673e97bc5192384e06 (patch)
treeb564ad785cd11a6578c49a4dcaf14980c1ba476e /lib/Travel/Status/DE/IRIS.pm
parentc5c197f16c7d77ef4e1592ceb19116c71f319791 (diff)
prepare async support. TODO: meta / related station handling
Diffstat (limited to 'lib/Travel/Status/DE/IRIS.pm')
-rw-r--r--lib/Travel/Status/DE/IRIS.pm231
1 files changed, 231 insertions, 0 deletions
diff --git a/lib/Travel/Status/DE/IRIS.pm b/lib/Travel/Status/DE/IRIS.pm
index f46cb2b..1c21339 100644
--- a/lib/Travel/Status/DE/IRIS.pm
+++ b/lib/Travel/Status/DE/IRIS.pm
@@ -31,6 +31,72 @@ sub try_load_xml {
return ( $tree, undef );
}
+sub new_p {
+ my ( $class, %opt ) = @_;
+ my $promise = $opt{promise}->new;
+
+ if ( not $opt{station} ) {
+ return $promise->reject('station flag must be passed');
+ }
+
+ my $self = $class->new( %opt, async => 1 );
+ $self->{promise} = $opt{promise};
+
+ my $lookahead_steps = int( $self->{lookahead} / 60 );
+ if ( ( 60 - $self->{datetime}->minute ) < ( $self->{lookahead} % 60 ) ) {
+ $lookahead_steps++;
+ }
+ my $lookbehind_steps = int( $self->{lookbehind} / 60 );
+ if ( $self->{datetime}->minute < ( $self->{lookbehind} % 60 ) ) {
+ $lookbehind_steps++;
+ }
+
+ $self->get_station_p(
+ name => $opt{station},
+ )->then(
+ sub {
+ my ($station) = @_;
+ $self->{station} = $station;
+ $self->{related_stations} = [];
+
+ my $dt_req = $self->{datetime}->clone;
+ my @subreq
+ = ( $self->get_timetable_p( $self->{station}{uic}, $dt_req ) );
+ for ( 1 .. $lookahead_steps ) {
+ $dt_req->add( hours => 1 );
+ push( @subreq,
+ $self->get_timetable_p( $self->{station}{uic}, $dt_req ) );
+ }
+ $dt_req = $self->{datetime}->clone;
+ for ( 1 .. $lookbehind_steps ) {
+ $dt_req->subtract( hours => 1 );
+ push( @subreq,
+ $self->get_timetable_p( $self->{station}{uic}, $dt_req ) );
+ }
+
+ return $self->{promise}->all(@subreq);
+ }
+ )->then(
+ sub {
+ return $self->get_realtime_p;
+ }
+ )->then(
+ sub {
+ $self->postprocess_results;
+ $promise->resolve($self);
+ return;
+ }
+ )->catch(
+ sub {
+ my ($err) = @_;
+ $promise->reject($err);
+ return;
+ }
+ )->wait;
+
+ return $promise;
+}
+
sub new {
my ( $class, %opt ) = @_;
@@ -74,6 +140,10 @@ sub new {
$lookbehind_steps++;
}
+ if ( $opt{async} ) {
+ return $self;
+ }
+
if ( not $self->{user_agent} ) {
my %lwp_options = %{ $opt{lwp_options} // { timeout => 10 } };
$self->{user_agent} = LWP::UserAgent->new(%lwp_options);
@@ -182,6 +252,55 @@ sub postprocess_results {
$self->create_replacement_refs;
}
+sub get_with_cache_p {
+ my ( $self, $cache, $url ) = @_;
+
+ if ( $self->{developer_mode} ) {
+ say "GET $url";
+ }
+
+ my $promise = $self->{promise}->new;
+
+ if ($cache) {
+ my $content = $cache->thaw($url);
+ if ($content) {
+ if ( $self->{developer_mode} ) {
+ say ' cache hit';
+ }
+ return $promise->resolve($content);
+ }
+ }
+
+ if ( $self->{developer_mode} ) {
+ say ' cache miss';
+ }
+
+ my $res = $self->{user_agent}->get_p($url)->then(
+ sub {
+ my ($tx) = @_;
+ if ( my $err = $tx->error ) {
+ $promise->reject(
+ "GET $url returned HTTP $err->{code} $err->{messag}");
+ return;
+ }
+ my $content = $tx->res->body;
+ if ($cache) {
+ $cache->freeze( $url, \$content );
+ }
+ $promise->resolve($content);
+ return;
+ }
+ )->catch(
+ sub {
+ my ($err) = @_;
+ $promise->reject($err);
+ return;
+ }
+ )->wait;
+
+ return $promise;
+}
+
sub get_with_cache {
my ( $self, $cache, $url ) = @_;
@@ -218,6 +337,48 @@ sub get_with_cache {
return ( $content, undef );
}
+sub get_station_p {
+ my ( $self, %opt ) = @_;
+
+ my $promise = $self->{promise}->new;
+ my $station = $opt{name};
+
+ $self->get_with_cache_p( $self->{main_cache},
+ $self->{iris_base} . '/station/' . $station )->then(
+ sub {
+ my ($raw) = @_;
+ my ( $xml_st, $xml_err ) = try_load_xml($raw);
+ if ($xml_err) {
+ $promise->reject('Failed to parse station data: Invalid XML');
+ return;
+ }
+ my $station_node = ( $xml_st->findnodes('//station') )[0];
+
+ if ( not $station_node ) {
+ $promise->reject(
+ "Station '$station' has no associated timetable");
+ return;
+ }
+ $promise->resolve(
+ {
+ uic => $station_node->getAttribute('eva'),
+ name => $station_node->getAttribute('name'),
+ ds100 => $station_node->getAttribute('ds100'),
+ }
+ );
+ return;
+ }
+ )->catch(
+ sub {
+ my ($err) = @_;
+ $promise->reject($err);
+ return;
+ }
+ )->wait;
+
+ return $promise;
+}
+
sub get_station {
my ( $self, %opt ) = @_;
@@ -393,6 +554,41 @@ sub add_result {
return $result;
}
+sub get_timetable_p {
+ my ( $self, $eva, $dt ) = @_;
+
+ my $promise = $self->{promise}->new;
+
+ $self->get_with_cache_p( $self->{main_cache},
+ $dt->strftime( $self->{iris_base} . "/plan/${eva}/%y%m%d/%H" ) )->then(
+ sub {
+ my ($raw) = @_;
+ my ( $xml, $xml_err ) = try_load_xml($raw);
+ if ($xml_err) {
+ $promise->reject(
+ 'Failed to parse a schedule part: Invalid XML');
+ return;
+ }
+ my $station
+ = ( $xml->findnodes('/timetable') )[0]->getAttribute('station');
+
+ for my $s ( $xml->findnodes('/timetable/s') ) {
+
+ $self->add_result( $station, $eva, $s );
+ }
+ $promise->resolve;
+ return;
+ }
+ )->catch(
+ sub {
+ my ($err) = @_;
+ $promise->reject($err);
+ return;
+ }
+ )->wait;
+ return $promise;
+}
+
sub get_timetable {
my ( $self, $eva, $dt ) = @_;
@@ -422,6 +618,36 @@ sub get_timetable {
return $self;
}
+sub get_realtime_p {
+ my ($self) = @_;
+
+ my $promise = $self->{promise}->new;
+
+ my $eva = $self->{station}{uic};
+ $self->get_with_cache_p( $self->{rt_cache},
+ $self->{iris_base} . "/fchg/${eva}" )->then(
+ sub {
+ my ($raw) = @_;
+ my ( $xml, $xml_err ) = try_load_xml($raw);
+ if ($xml_err) {
+ $promise->reject(
+ 'Failed to parse a schedule part: Invalid XML');
+ return;
+ }
+ $self->parse_realtime( $eva, $xml );
+ $promise->resolve;
+ return;
+ }
+ )->catch(
+ sub {
+ my ($err) = @_;
+ $promise->reject("Failed to fetch realtime data: $err");
+ return;
+ }
+ )->wait;
+ return $promise;
+}
+
sub get_realtime {
my ($self) = @_;
@@ -443,6 +669,11 @@ sub get_realtime {
return $self;
}
+ $self->parse_realtime( $eva, $xml );
+}
+
+sub parse_realtime {
+ my ( $self, $eva, $xml ) = @_;
my $station = ( $xml->findnodes('/timetable') )[0]->getAttribute('station');
for my $s ( $xml->findnodes('/timetable/s') ) {