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authorDaniel Friesel <derf@finalrewind.org>2022-10-03 19:14:33 +0200
committerDaniel Friesel <derf@finalrewind.org>2022-10-03 19:14:33 +0200
commit9558a677da410ca35ab6bfc43f965ba012c341e4 (patch)
treeae93559dfc115f48a585cb7f349c1a0336c14287 /lib/Travel/Status
parentbe8d1ea0395de818b8f3f6b8610ccdedd19fe71a (diff)
support async operation with promises (new_p constructor)
Diffstat (limited to 'lib/Travel/Status')
-rw-r--r--lib/Travel/Status/DE/HAFAS.pm100
1 files changed, 94 insertions, 6 deletions
diff --git a/lib/Travel/Status/DE/HAFAS.pm b/lib/Travel/Status/DE/HAFAS.pm
index 2f1834c..174ebf6 100644
--- a/lib/Travel/Status/DE/HAFAS.pm
+++ b/lib/Travel/Status/DE/HAFAS.pm
@@ -178,11 +178,13 @@ sub new {
my ( $obj, %conf ) = @_;
my $service = $conf{service};
- my %lwp_options = %{ $conf{lwp_options} // { timeout => 10 } };
+ my $ua = $conf{user_agent};
- my $ua = $conf{user_agent} // LWP::UserAgent->new(%lwp_options);
-
- $ua->env_proxy;
+ if ( not $ua ) {
+ my %lwp_options = %{ $conf{lwp_options} // { timeout => 10 } };
+ $ua = LWP::UserAgent->new(%lwp_options);
+ $ua->env_proxy;
+ }
if ( not $conf{station} ) {
confess('You need to specify a station');
@@ -264,7 +266,7 @@ sub new {
%{ $hafas_instance{$service}{request} }
};
- my $json = JSON->new->utf8;
+ my $json = $self->{json} = JSON->new->utf8;
# The JSON request is the cache key, so if we have a cache we must ensure
# that JSON serialization is deterministic.
@@ -288,6 +290,11 @@ sub new {
}
}
+ if ( $conf{async} ) {
+ $self->{url} = $url;
+ return $self;
+ }
+
if ( $conf{json} ) {
$self->{raw_json} = $conf{json};
}
@@ -316,12 +323,43 @@ sub new {
return $self;
}
+sub new_p {
+ my ( $obj, %conf ) = @_;
+ my $promise = $conf{promise}->new;
+
+ if ( not $conf{station} ) {
+ return $promise->reject('station flag must be passed');
+ }
+
+ my $self = $obj->new( %conf, async => 1 );
+ $self->{promise} = $conf{promise};
+
+ $self->post_with_cache_p( $self->{url} )->then(
+ sub {
+ my ($content) = @_;
+ $self->{raw_json} = $self->{json}->decode($content);
+ $self->check_mgate;
+ $self->parse_mgate;
+ $promise->resolve($self);
+ return;
+ }
+ )->catch(
+ sub {
+ my ($err) = @_;
+ $promise->reject($err);
+ return;
+ }
+ )->wait;
+
+ return $promise;
+}
+
sub post_with_cache {
my ( $self, $url ) = @_;
my $cache = $self->{cache};
if ( $self->{developer_mode} ) {
- say "GET $url";
+ say "POST $url";
}
if ($cache) {
@@ -358,6 +396,56 @@ sub post_with_cache {
return ( $content, undef );
}
+sub post_with_cache_p {
+ my ( $self, $url ) = @_;
+ my $cache = $self->{cache};
+
+ if ( $self->{developer_mode} ) {
+ say "POST $url";
+ }
+
+ my $promise = $self->{promise}->new;
+
+ if ($cache) {
+ my $content = $cache->thaw( $self->{post} );
+ if ($content) {
+ if ( $self->{developer_mode} ) {
+ say ' cache hit';
+ }
+ return $promise->resolve( ${$content} );
+ }
+ }
+
+ if ( $self->{developer_mode} ) {
+ say ' cache miss';
+ }
+
+ $self->{ua}->post_p( $url, $self->{post} )->then(
+ sub {
+ my ($tx) = @_;
+ if ( my $err = $tx->error ) {
+ $promise->reject(
+ "POST $url returned HTTP $err->{code} $err->{message}");
+ return;
+ }
+ my $content = $tx->res->body;
+ if ($cache) {
+ $cache->freeze( $self->{post}, \$content );
+ }
+ $promise->resolve($content);
+ return;
+ }
+ )->catch(
+ sub {
+ my ($err) = @_;
+ $promise->reject($err);
+ return;
+ }
+ )->wait;
+
+ return $promise;
+}
+
sub check_mgate {
my ($self) = @_;