X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=catagits%2FCatalyst-Runtime.git;a=blobdiff_plain;f=lib%2FCatalyst%2FDispatchType%2FChained.pm;h=602894c5276ca7330ce07f92bcc00097e469e591;hp=399a3788c6083e9b4dacaa4b765f52170f66d450;hb=26dc649ad1a74622697f25fcbf29e806e75fcd2f;hpb=d21a2b27d12dd019f96f1ff1a5139728373ae779

diff --git a/lib/Catalyst/DispatchType/Chained.pm b/lib/Catalyst/DispatchType/Chained.pm
index 399a378..602894c 100644
--- a/lib/Catalyst/DispatchType/Chained.pm
+++ b/lib/Catalyst/DispatchType/Chained.pm
@@ -5,6 +5,7 @@ extends 'Catalyst::DispatchType';
 
 use Text::SimpleTable;
 use Catalyst::ActionChain;
+use Catalyst::Utils;
 use URI;
 
 has _endpoints => (
@@ -38,6 +39,8 @@ Catalyst::DispatchType::Chained - Path Part DispatchType
 
 =head1 SYNOPSIS
 
+Path part matching, allowing several actions to sequentially take care of processing a request:
+
   #   root action - captures one argument after it
   sub foo_setup : Chained('/') PathPart('foo') CaptureArgs(1) {
       my ( $self, $c, $foo_arg ) = @_;
@@ -52,7 +55,16 @@ Catalyst::DispatchType::Chained - Path Part DispatchType
 
 =head1 DESCRIPTION
 
-See L</USAGE>.
+Dispatch type managing default behaviour.  For more information on
+dispatch types, see:
+
+=over 4
+
+=item * L<Catalyst::Manual::Intro> for how they affect website authors
+
+=item * L<Catalyst::DispatchType> for implementation information.
+
+=back
 
 =head1 METHODS
 
@@ -67,9 +79,15 @@ sub list {
 
     return unless $self->_endpoints;
 
+    my $column_width = Catalyst::Utils::term_width() - 35 - 9;
     my $paths = Text::SimpleTable->new(
-                    [ 35, 'Path Spec' ], [ 36, 'Private' ]
-                );
+       [ 35, 'Path Spec' ], [ $column_width, 'Private' ],
+    );
+
+    my $has_unattached_actions;
+    my $unattached_actions = Text::SimpleTable->new(
+        [ 35, 'Private' ], [ 36, 'Missing parent' ],
+    );
 
     ENDPOINT: foreach my $endpoint (
                   sort { $a->reverse cmp $b->reverse }
@@ -92,7 +110,11 @@ sub list {
             $curr = $self->_actions->{$parent};
             unshift(@parents, $curr) if $curr;
         }
-        next ENDPOINT unless $parent eq '/'; # skip dangling action
+        if ($parent ne '/') {
+            $has_unattached_actions = 1;
+            $unattached_actions->row('/'.$parents[0]->reverse, $parent);
+            next ENDPOINT;
+        }
         my @rows;
         foreach my $p (@parents) {
             my $name = "/${p}";
@@ -110,6 +132,8 @@ sub list {
     }
 
     $c->log->debug( "Loaded Chained actions:\n" . $paths->draw . "\n" );
+    $c->log->debug( "Unattached Chained actions:\n", $unattached_actions->draw . "\n" )
+        if $has_unattached_actions;
 }
 
 =head2 $self->match( $c, $path )
@@ -245,8 +269,13 @@ sub register {
           "Multiple Chained attributes not supported registering ${action}"
         );
     }
+    my $chained_to = $chained_attr[0];
 
-    my $children = ($self->_children_of->{ $chained_attr[0] } ||= {});
+    Catalyst::Exception->throw(
+      "Actions cannot chain to themselves registering /${action}"
+    ) if ($chained_to eq '/' . $action);
+
+    my $children = ($self->_children_of->{ $chained_to } ||= {});
 
     my @path_part = @{ $action->attributes->{PathPart} || [] };
 
@@ -319,6 +348,31 @@ sub uri_for_action {
    
 }
 
+=head2 $c->expand_action($action)
+
+Return a list of actions that represents a chained action. See 
+L<Catalyst::Dispatcher> for more info. You probably want to
+use the expand_action it provides rather than this directly.
+
+=cut
+
+sub expand_action {
+    my ($self, $action) = @_;
+
+    return unless $action->attributes && $action->attributes->{Chained};
+
+    my @chain;
+    my $curr = $action;
+
+    while ($curr) {
+        push @chain, $curr;
+        my $parent = $curr->attributes->{Chained}->[0];
+        $curr = $self->_actions->{$parent};
+    }
+
+    return Catalyst::ActionChain->from_chain([reverse @chain]);
+}
+
 __PACKAGE__->meta->make_immutable;
 
 =head1 USAGE