Commit | Line | Data |
4ed4fb42 |
1 | package Web::Dispatch; |
2 | |
3 | use Sub::Quote; |
4 | use Scalar::Util qw(blessed); |
1f4dd6f9 |
5 | |
6 | sub MAGIC_MIDDLEWARE_KEY { __PACKAGE__.'.middleware' } |
7 | |
4ed4fb42 |
8 | use Moo; |
9 | use Web::Dispatch::Parser; |
10 | use Web::Dispatch::Node; |
11 | |
12 | with 'Web::Dispatch::ToApp'; |
13 | |
14 | has app => (is => 'ro', required => 1); |
15 | has parser_class => ( |
16 | is => 'ro', default => quote_sub q{ 'Web::Dispatch::Parser' } |
17 | ); |
18 | has node_class => ( |
19 | is => 'ro', default => quote_sub q{ 'Web::Dispatch::Node' } |
20 | ); |
21 | has node_args => (is => 'ro', default => quote_sub q{ {} }); |
22 | has _parser => (is => 'lazy'); |
23 | |
24 | sub _build__parser { |
25 | my ($self) = @_; |
26 | $self->parser_class->new; |
27 | } |
28 | |
29 | sub call { |
30 | my ($self, $env) = @_; |
31 | $self->_dispatch($env, $self->app); |
32 | } |
33 | |
34 | sub _dispatch { |
35 | my ($self, $env, @match) = @_; |
36 | while (my $try = shift @match) { |
37 | if (ref($try) eq 'HASH') { |
38 | $env = { %$env, %$try }; |
39 | next; |
40 | } elsif (ref($try) eq 'ARRAY') { |
41 | return $try; |
42 | } |
69aaa28a |
43 | my @result = $self->_to_try($try, \@match)->($env, @match); |
4ed4fb42 |
44 | next unless @result and defined($result[0]); |
45 | if (ref($result[0]) eq 'ARRAY') { |
d9ae38d9 |
46 | if (@{$result[0]} == 1 and ref($result[0][0]) eq 'CODE') { |
47 | return $result[0][0]; |
48 | } |
4ed4fb42 |
49 | return $result[0]; |
5ba2eb68 |
50 | } elsif (blessed($result[0]) && $result[0]->isa('Plack::Middleware')) { |
51 | die "Multiple results but first one is a middleware ($result[0])" |
52 | if @result > 1; |
1f4dd6f9 |
53 | # middleware needs to uplevel exactly once to wrap the rest of the |
54 | # level it was created for - next elsif unwraps it |
55 | return { MAGIC_MIDDLEWARE_KEY, $result[0] }; |
5ba2eb68 |
56 | my $mw = $result[0]; |
1f4dd6f9 |
57 | } elsif ( |
58 | ref($result[0]) eq 'HASH' |
59 | and my $mw = $result[0]->{+MAGIC_MIDDLEWARE_KEY} |
60 | ) { |
5ba2eb68 |
61 | $mw->app(sub { $self->_dispatch($_[0], @match) }); |
62 | return $mw->to_app->($env); |
4ed4fb42 |
63 | } elsif (blessed($result[0]) && !$result[0]->can('to_app')) { |
64 | return $result[0]; |
65 | } else { |
66 | # make a copy so we don't screw with it assigning further up |
67 | my $env = $env; |
1f4dd6f9 |
68 | unshift @match, sub { $self->_dispatch($env, @result) }; |
4ed4fb42 |
69 | } |
70 | } |
71 | return; |
72 | } |
73 | |
74 | sub _to_try { |
69aaa28a |
75 | my ($self, $try, $more) = @_; |
4ed4fb42 |
76 | if (ref($try) eq 'CODE') { |
77 | if (defined(my $proto = prototype($try))) { |
78 | $self->_construct_node( |
79 | match => $self->_parser->parse($proto), run => $try |
80 | )->to_app; |
81 | } else { |
82 | $try |
83 | } |
69aaa28a |
84 | } elsif (!ref($try) and ref($more->[0]) eq 'CODE') { |
85 | $self->_construct_node( |
86 | match => $self->_parser->parse($try), run => shift(@$more) |
87 | )->to_app; |
4ed4fb42 |
88 | } elsif (blessed($try) && $try->can('to_app')) { |
89 | $try->to_app; |
90 | } else { |
91 | die "No idea how we got here with $try"; |
92 | } |
93 | } |
94 | |
95 | sub _construct_node { |
96 | my ($self, %args) = @_; |
69aaa28a |
97 | $self->node_class->new({ %{$self->node_args}, %args }); |
4ed4fb42 |
98 | } |
99 | |
100 | 1; |