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authorDaniel Friesel <derf@finalrewind.org>2020-09-10 20:48:13 +0200
committerDaniel Friesel <derf@finalrewind.org>2020-09-10 20:48:13 +0200
commitc5b5c1e9afa2f82ee4c234af14e07d07ade6b0d5 (patch)
tree144fbaee39572e0535a02b7585a535d6cf924cd9 /lib/DBInfoscreen/Helper/HAFAS.pm
parent8f657f59c7c306040f39057c02f705bb4a0c3158 (diff)
handle /map requests asynchronously
Diffstat (limited to 'lib/DBInfoscreen/Helper/HAFAS.pm')
-rw-r--r--lib/DBInfoscreen/Helper/HAFAS.pm122
1 files changed, 122 insertions, 0 deletions
diff --git a/lib/DBInfoscreen/Helper/HAFAS.pm b/lib/DBInfoscreen/Helper/HAFAS.pm
index c4f0883..d5d9a66 100644
--- a/lib/DBInfoscreen/Helper/HAFAS.pm
+++ b/lib/DBInfoscreen/Helper/HAFAS.pm
@@ -56,6 +56,54 @@ sub hafas_json_req {
return $json;
}
+sub get_json_p {
+ my ( $self, $cache, $url ) = @_;
+
+ my $promise = Mojo::Promise->new;
+
+ if ( my $content = $cache->thaw($url) ) {
+ $promise->resolve($content);
+ return $promise;
+ }
+
+ $self->{user_agent}->request_timeout(5)->get_p( $url => $self->{header} )
+ ->then(
+ sub {
+ my ($tx) = @_;
+
+ if ( my $err = $tx->error ) {
+ $self->{log}->warn(
+ "hafas->get_json_p($url): HTTP $err->{code} $err->{message}"
+ );
+ $promise->reject(
+ "GET $url returned HTTP $err->{code} $err->{message}");
+ return;
+ }
+ my $body
+ = encode( 'utf-8', decode( 'ISO-8859-15', $tx->res->body ) );
+
+ $body =~ s{^TSLs[.]sls = }{};
+ $body =~ s{;$}{};
+ $body =~ s{&#x0028;}{(}g;
+ $body =~ s{&#x0029;}{)}g;
+
+ my $json = decode_json($body);
+
+ $cache->freeze( $url, $json );
+
+ $promise->resolve($json);
+ }
+ )->catch(
+ sub {
+ my ($err) = @_;
+ $self->{log}->warn("get($url): $err");
+ $promise->reject($err);
+ }
+ )->wait;
+
+ return $promise;
+}
+
sub hafas_xml_req {
my ( $self, $cache, $url ) = @_;
@@ -188,6 +236,80 @@ sub trainsearch {
return $result;
}
+sub trainsearch_p {
+ my ( $self, %opt ) = @_;
+
+ my $base
+ = 'https://reiseauskunft.bahn.de/bin/trainsearch.exe/dn?L=vs_json&start=yes&rt=1';
+
+ if ( not $opt{date_yy} ) {
+ my $now = DateTime->now( time_zone => 'Europe/Berlin' );
+ $opt{date_yy} = $now->strftime('%d.%m.%y');
+ $opt{date_yyyy} = $now->strftime('%d.%m.%Y');
+ }
+
+ my $promise = Mojo::Promise->new;
+
+ $self->get_json_p( $self->{realtime_cache},
+ "${base}&date=$opt{date_yy}&trainname=$opt{train_no}" )->then(
+ sub {
+ my ($trainsearch) = @_;
+
+ # Fallback: Take first result
+ my $result = $trainsearch->{suggestions}[0];
+
+ # Try finding a result for the current date
+ for my $suggestion ( @{ $trainsearch->{suggestions} // [] } ) {
+
+ # Drunken API, sail with care. Both date formats are used interchangeably
+ if (
+ exists $suggestion->{depDate}
+ and ( $suggestion->{depDate} eq $opt{date_yy}
+ or $suggestion->{depDate} eq $opt{date_yyyy} )
+ )
+ {
+ # Train numbers are not unique, e.g. IC 149 refers both to the
+ # InterCity service Amsterdam -> Berlin and to the InterCity service
+ # Koebenhavns Lufthavn st -> Aarhus. One workaround is making
+ # requests with the stationFilter=80 parameter. Checking the origin
+ # station seems to be the more generic solution, so we do that
+ # instead.
+ if ( $opt{train_origin}
+ and $suggestion->{dep} eq $opt{train_origin} )
+ {
+ $result = $suggestion;
+ last;
+ }
+ }
+ }
+
+ if ($result) {
+
+ # The trip_id's date part doesn't seem to matter -- so far, HAFAS is
+ # happy as long as the date part starts with a number. HAFAS-internal
+ # tripIDs use this format (withouth leading zero for day of month < 10)
+ # though, so let's stick with it.
+ my $date_map = $opt{date_yyyy};
+ $date_map =~ tr{.}{}d;
+ $result->{trip_id} = sprintf( '1|%d|%d|%d|%s',
+ $result->{id}, $result->{cycle},
+ $result->{pool}, $date_map );
+ $promise->resolve($result);
+ }
+ else {
+ $promise->reject("Zug $opt{train_no} nicht gefunden");
+ }
+ }
+ )->catch(
+ sub {
+ my ($err) = @_;
+ $promise->reject($err);
+ }
+ )->wait;
+
+ return $promise;
+}
+
sub get_route_timestamps {
my ( $self, %opt ) = @_;