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1 | package Catalyst::ActionChain; |
2 | |
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3 | use Moose; |
4 | extends qw(Catalyst::Action); |
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5 | |
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6 | has chain => (is => 'rw'); |
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7 | no Moose; |
8 | |
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9 | =head1 NAME |
10 | |
11 | Catalyst::ActionChain - Chain of Catalyst Actions |
12 | |
13 | =head1 SYNOPSIS |
14 | |
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15 | See L<Catalyst::Manual::Intro> for more info about Chained actions. |
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16 | |
17 | =head1 DESCRIPTION |
18 | |
19 | This class represents a chain of Catalyst Actions. It behaves exactly like |
20 | the action at the *end* of the chain except on dispatch it will execute all |
21 | the actions in the chain in order. |
22 | |
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23 | =cut |
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24 | |
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25 | sub dispatch { |
26 | my ( $self, $c ) = @_; |
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27 | my @captures = @{$c->req->captures||[]}; |
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28 | my @chain = @{ $self->chain }; |
29 | my $last = pop(@chain); |
30 | foreach my $action ( @chain ) { |
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31 | my @args; |
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32 | if (my $cap = $action->number_of_captures) { |
33 | @args = splice(@captures, 0, $cap); |
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34 | } |
35 | local $c->request->{arguments} = \@args; |
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36 | $action->dispatch( $c ); |
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37 | |
38 | # break the chain if exception occurs in the middle of chain |
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39 | return if (@{$c->error} && $c->config->{abort_chain_on_error_fix}); |
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40 | } |
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41 | $last->dispatch( $c ); |
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42 | } |
43 | |
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44 | sub from_chain { |
45 | my ( $self, $actions ) = @_; |
46 | my $final = $actions->[-1]; |
47 | return $self->new({ %$final, chain => $actions }); |
48 | } |
49 | |
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50 | sub number_of_captures { |
51 | my ( $self ) = @_; |
52 | my $chain = $self->chain; |
53 | my $captures = 0; |
54 | |
55 | $captures += $_->number_of_captures for @$chain; |
56 | return $captures; |
57 | } |
58 | |
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59 | __PACKAGE__->meta->make_immutable; |
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60 | 1; |
61 | |
62 | __END__ |
63 | |
64 | =head1 METHODS |
65 | |
66 | =head2 chain |
67 | |
68 | Accessor for the action chain; will be an arrayref of the Catalyst::Action |
69 | objects encapsulated by this chain. |
70 | |
71 | =head2 dispatch( $c ) |
72 | |
73 | Dispatch this action chain against a context; will dispatch the encapsulated |
74 | actions in order. |
75 | |
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76 | =head2 from_chain( \@actions ) |
77 | |
78 | Takes a list of Catalyst::Action objects and constructs and returns a |
79 | Catalyst::ActionChain object representing a chain of these actions |
80 | |
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81 | =head2 number_of_captures |
82 | |
83 | Returns the total number of captures for the entire chain of actions. |
84 | |
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85 | =head2 meta |
86 | |
87 | Provided by Moose |
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88 | |
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89 | =head1 AUTHORS |
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90 | |
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91 | Catalyst Contributors, see Catalyst.pm |
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92 | |
93 | =head1 COPYRIGHT |
94 | |
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95 | This library is free software. You can redistribute it and/or modify it under |
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96 | the same terms as Perl itself. |
97 | |
98 | =cut |