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1 | package Catalyst::ActionChain; |
2 | |
3 | use strict; |
4 | use base qw/Catalyst::Action/; |
5 | |
6 | __PACKAGE__->mk_accessors(qw/chain/); |
7 | |
8 | use overload ( |
9 | |
10 | # Stringify to reverse for debug output etc. |
11 | q{""} => sub { shift->{reverse} }, |
12 | |
13 | # Codulate to execute to invoke the encapsulated action coderef |
14 | '&{}' => sub { my $self = shift; sub { $self->execute(@_); }; }, |
15 | |
16 | # Make general $stuff still work |
17 | fallback => 1, |
18 | |
19 | ); |
20 | |
21 | =head1 NAME |
22 | |
23 | Catalyst::ActionChain - Chain of Catalyst Actions |
24 | |
25 | =head1 SYNOPSIS |
26 | |
27 | See L<Catalyst>. |
28 | |
29 | =head1 DESCRIPTION |
30 | |
31 | This class represents a chain of Catalyst Actions. It behaves exactly like |
32 | the action at the *end* of the chain except on dispatch it will execute all |
33 | the actions in the chain in order. |
34 | |
35 | =head1 METHODS |
36 | |
37 | =head2 chain |
38 | |
39 | Accessor for the action chain; will be an arrayref of the Catalyst::Action |
40 | objects encapsulated by this chain. |
41 | |
42 | =head2 dispatch( $c ) |
43 | |
44 | Dispatch this action chain against a context; will dispatch the encapsulated |
45 | actions in order. |
46 | |
47 | =cut |
48 | |
49 | sub dispatch { |
50 | my ( $self, $c ) = @_; |
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51 | my @captures = @{$c->req->captures||[]}; |
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52 | my @chain = @{ $self->chain }; |
53 | my $last = pop(@chain); |
54 | foreach my $action ( @chain ) { |
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55 | my @args; |
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56 | if (my $cap = $action->attributes->{CaptureArgs}) { |
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57 | @args = splice(@captures, 0, $cap->[0]); |
58 | } |
59 | local $c->request->{arguments} = \@args; |
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60 | $action->dispatch( $c ); |
61 | } |
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62 | $last->dispatch( $c ); |
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63 | } |
64 | |
65 | =head2 from_chain( \@actions ) |
66 | |
67 | Takes a list of Catalyst::Action objects and constructs and returns a |
68 | Catalyst::ActionChain object representing a chain of these actions |
69 | |
70 | =cut |
71 | |
72 | sub from_chain { |
73 | my ( $self, $actions ) = @_; |
74 | my $final = $actions->[-1]; |
75 | return $self->new({ %$final, chain => $actions }); |
76 | } |
77 | |
78 | =head1 AUTHOR |
79 | |
80 | Matt S. Trout |
81 | |
82 | =head1 COPYRIGHT |
83 | |
84 | This program is free software, you can redistribute it and/or modify it under |
85 | the same terms as Perl itself. |
86 | |
87 | =cut |
88 | |
89 | 1; |