use Sub::Quote;
use Scalar::Util qw(blessed);
+
+sub MAGIC_MIDDLEWARE_KEY { __PACKAGE__.'.middleware' }
+
use Moo;
use Web::Dispatch::Parser;
use Web::Dispatch::Node;
sub call {
my ($self, $env) = @_;
- $self->_dispatch($env, $self->app);
+ my $res = $self->_dispatch($env, $self->app);
+ return $res->[0] if ref($res) eq 'ARRAY' and @{$res} == 1 and ref($res->[0]) eq 'CODE';
+ return $res;
}
sub _dispatch {
my ($self, $env, @match) = @_;
- while (my $try = shift @match) {
+ while (defined(my $try = shift @match)) {
+
+ return $try if ref($try) eq 'ARRAY';
if (ref($try) eq 'HASH') {
- $env = { %$env, %$try };
+ $env = { 'Web::Dispatch.original_env' => $env, %$env, %$try };
next;
- } elsif (ref($try) eq 'ARRAY') {
- return $try;
}
- my @result = $self->_to_try($try)->($env, @match);
+
+ my @result = $self->_to_try($try, \@match)->($env, @match);
next unless @result and defined($result[0]);
- if (ref($result[0]) eq 'ARRAY') {
- return $result[0];
- } elsif (blessed($result[0]) && $result[0]->can('wrap')) {
- return $result[0]->wrap(sub {
- $self->_dispatch($_[0], @match)
- })->($env);
- } elsif (blessed($result[0]) && !$result[0]->can('to_app')) {
- return $result[0];
- } else {
- # make a copy so we don't screw with it assigning further up
- my $env = $env;
- # try not to end up quite so bloody deep in the call stack
- if (@match) {
- unshift @match, sub { $self->_dispatch($env, @result) };
- } else {
- @match = @result;
- }
+
+ my $first = $result[0];
+
+ if (my $res = $self->_have_result($first, \@result, \@match, $env)) {
+
+ return $res;
}
+
+ # make a copy so we don't screw with it assigning further up
+ my $env = $env;
+ unshift @match, sub { $self->_dispatch($env, @result) };
}
+
return;
}
+sub _have_result {
+ my ($self, $first, $result, $match, $env) = @_;
+
+ if (ref($first) eq 'ARRAY') {
+ return $first;
+ }
+ elsif (blessed($first) && $first->isa('Plack::Middleware')) {
+ return $self->_uplevel_middleware($first, $result);
+ }
+ elsif (ref($first) eq 'HASH' and $first->{+MAGIC_MIDDLEWARE_KEY}) {
+ return $self->_redispatch_with_middleware($first, $match, $env);
+ }
+ elsif (
+ blessed($first) &&
+ not($first->can('to_app')) &&
+ not($first->isa('Web::Dispatch::Matcher'))
+ ) {
+ return $first;
+ }
+ return;
+}
+
+sub _uplevel_middleware {
+ my ($self, $match, $results) = @_;
+ die "Multiple results but first one is a middleware ($match)"
+ if @{$results} > 1;
+ # middleware needs to uplevel exactly once to wrap the rest of the
+ # level it was created for - next elsif unwraps it
+ return { MAGIC_MIDDLEWARE_KEY, $match };
+}
+
+sub _redispatch_with_middleware {
+ my ($self, $first, $match, $env) = @_;
+
+ my $mw = $first->{+MAGIC_MIDDLEWARE_KEY};
+
+ $mw->app(sub { $self->_dispatch($_[0], @{$match}) });
+
+ return $mw->to_app->($env);
+}
+
sub _to_try {
- my ($self, $try) = @_;
+ my ($self, $try, $more) = @_;
+
+ # sub (<spec>) {} becomes a dispatcher
+ # sub {} is a PSGI app and can be returned as is
+ # '<spec>' => sub {} becomes a dispatcher
+ # $obj isa WD:Predicates::Matcher => sub { ... } - become a dispatcher
+ # $obj w/to_app method is a Plack::App-like thing - call it to get a PSGI app
+ #
+
if (ref($try) eq 'CODE') {
if (defined(my $proto = prototype($try))) {
- $self->_construct_node(
- match => $self->_parser->parse($proto), run => $try
- )->to_app;
+ $self->_construct_node(match => $proto, run => $try)->to_app;
} else {
$try
}
+ } elsif (!ref($try) and ref($more->[0]) eq 'CODE') {
+ $self->_construct_node(match => $try, run => shift(@$more))->to_app;
+ } elsif (
+ (blessed($try) && $try->isa('Web::Dispatch::Matcher'))
+ and (ref($more->[0]) eq 'CODE')
+ ) {
+ $self->node_class->new({
+ %{$self->node_args},
+ match => $try,
+ run => shift(@$more)
+ })->to_app;
} elsif (blessed($try) && $try->can('to_app')) {
$try->to_app;
} else {
sub _construct_node {
my ($self, %args) = @_;
- @args{keys %$_} = values %$_ for $self->node_args;
- $self->node_class->new(\%args);
+ $args{match} = $self->_parser->parse($args{match});
+ $self->node_class->new({ %{$self->node_args}, %args });
}
1;