package Catalyst::DispatchType::Chained;
-use strict;
-use base qw/Catalyst::DispatchType/;
+use Moose;
+extends 'Catalyst::DispatchType';
+
use Text::SimpleTable;
use Catalyst::ActionChain;
+use Catalyst::Utils;
use URI;
+use Scalar::Util ();
+use Encode 2.21 'decode_utf8';
+
+has _endpoints => (
+ is => 'rw',
+ isa => 'ArrayRef',
+ required => 1,
+ default => sub{ [] },
+ );
+
+has _actions => (
+ is => 'rw',
+ isa => 'HashRef',
+ required => 1,
+ default => sub{ {} },
+ );
+
+has _children_of => (
+ is => 'rw',
+ isa => 'HashRef',
+ required => 1,
+ default => sub{ {} },
+ );
+
+no Moose;
# please don't perltidy this. hairy code within.
=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 ) = @_;
=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 application authors
+
+=item * L<Catalyst::DispatchType> for implementation information.
+
+=back
=head1 METHODS
sub list {
my ( $self, $c ) = @_;
- return unless $self->{endpoints};
+ return unless $self->_endpoints;
+ my $avail_width = Catalyst::Utils::term_width() - 9;
+ my $col1_width = ($avail_width * .50) < 35 ? 35 : int($avail_width * .50);
+ my $col2_width = $avail_width - $col1_width;
my $paths = Text::SimpleTable->new(
- [ 35, 'Path Spec' ], [ 36, 'Private' ]
- );
+ [ $col1_width, 'Path Spec' ], [ $col2_width, 'Private' ],
+ );
+
+ my $has_unattached_actions;
+ my $unattached_actions = Text::SimpleTable->new(
+ [ $col1_width, 'Private' ], [ $col2_width, 'Missing parent' ],
+ );
ENDPOINT: foreach my $endpoint (
sort { $a->reverse cmp $b->reverse }
- @{ $self->{endpoints} }
+ @{ $self->_endpoints }
) {
- my $args = $endpoint->attributes->{Args}->[0];
- my @parts = (defined($args) ? (("*") x $args) : '...');
+ my $args = $endpoint->list_extra_info->{Args};
+
+ my @parts;
+ if($endpoint->has_args_constraints) {
+ @parts = map { "{$_}" } $endpoint->all_args_constraints;
+ } elsif(defined $endpoint->attributes->{Args}) {
+ @parts = (defined($endpoint->attributes->{Args}[0]) ? (("*") x $args) : '...');
+ }
+
my @parents = ();
my $parent = "DUMMY";
+ my $extra = $self->_list_extra_http_methods($endpoint);
+ my $consumes = $self->_list_extra_consumes($endpoint);
+ my $scheme = $self->_list_extra_scheme($endpoint);
my $curr = $endpoint;
while ($curr) {
- if (my $cap = $curr->attributes->{CaptureArgs}) {
- unshift(@parts, (("*") x $cap->[0]));
+ if (my $cap = $curr->list_extra_info->{CaptureArgs}) {
+ if($curr->has_captures_constraints) {
+ my $names = join '/', map { "{$_}" } $curr->all_captures_constraints;
+ unshift(@parts, $names);
+ } else {
+ unshift(@parts, (("*") x $cap));
+ }
}
- if (my $pp = $curr->attributes->{PartPath}) {
+ if (my $pp = $curr->attributes->{PathPart}) {
unshift(@parts, $pp->[0])
if (defined $pp->[0] && length $pp->[0]);
}
$parent = $curr->attributes->{Chained}->[0];
- $curr = $self->{actions}{$parent};
+ $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] || $endpoint)->reverse, $parent);
+ next ENDPOINT;
+ }
my @rows;
foreach my $p (@parents) {
my $name = "/${p}";
- if (my $cap = $p->attributes->{CaptureArgs}) {
- $name .= ' ('.$cap->[0].')';
+
+ if (defined(my $extra = $self->_list_extra_http_methods($p))) {
+ $name = "${extra} ${name}";
+ }
+ if (defined(my $cap = $p->list_extra_info->{CaptureArgs})) {
+ if($p->has_captures_constraints) {
+ my $tc = join ',', @{$p->captures_constraints};
+ $name .= " ($tc)";
+ } else {
+ $name .= " ($cap)";
+ }
+ }
+ if (defined(my $ct = $p->list_extra_info->{Consumes})) {
+ $name .= ' :'.$ct;
+ }
+ if (defined(my $s = $p->list_extra_info->{Scheme})) {
+ $scheme = uc $s;
}
+
unless ($p eq $parents[0]) {
$name = "-> ${name}";
}
push(@rows, [ '', $name ]);
}
- push(@rows, [ '', (@rows ? "=> " : '')."/${endpoint}" ]);
- $rows[0][0] = join('/', '', @parts);
+
+ my $endpoint_arg_info;
+ if($endpoint->has_args_constraints) {
+ my $tc = join ',', @{$endpoint->args_constraints};
+ $endpoint_arg_info .= " ($tc)";
+ } else {
+ $endpoint_arg_info .= defined($endpoint->attributes->{Args}[0]) ? " ($args)" : " (...)";
+ }
+ push(@rows, [ '', (@rows ? "=> " : '').($extra ? "$extra " : ''). ($scheme ? "$scheme: ":'')."/${endpoint_arg_info}". ($consumes ? " :$consumes":"" ) ]);
+ my @display_parts = map { $_ =~s/%([0-9A-Fa-f]{2})/chr(hex($1))/eg; decode_utf8 $_ } @parts;
+ $rows[0][0] = join('/', '', @display_parts) || '/';
$paths->row(@$_) for @rows;
}
- $c->log->debug( "Loaded Path Part actions:\n" . $paths->draw );
+ $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;
+}
+
+sub _list_extra_http_methods {
+ my ( $self, $action ) = @_;
+ return unless defined $action->list_extra_info->{HTTP_METHODS};
+ return join(', ', @{$action->list_extra_info->{HTTP_METHODS}});
+
+}
+
+sub _list_extra_consumes {
+ my ( $self, $action ) = @_;
+ return unless defined $action->list_extra_info->{CONSUMES};
+ return join(', ', @{$action->list_extra_info->{CONSUMES}});
+}
+
+sub _list_extra_scheme {
+ my ( $self, $action ) = @_;
+ return unless defined $action->list_extra_info->{Scheme};
+ return uc $action->list_extra_info->{Scheme};
}
=head2 $self->match( $c, $path )
sub match {
my ( $self, $c, $path ) = @_;
- return 0 if @{$c->req->args};
+ my $request = $c->request;
+ return 0 if @{$request->args};
my @parts = split('/', $path);
- my ($chain, $captures) = $self->recurse_match($c, '/', \@parts);
+ my ($chain, $captures, $parts) = $self->recurse_match($c, '/', \@parts);
+
+ if ($parts && @$parts) {
+ for my $arg (@$parts) {
+ $arg =~ s/%([0-9A-Fa-f]{2})/chr(hex($1))/eg;
+ push @{$request->args}, $arg;
+ }
+ }
return 0 unless $chain;
my $action = Catalyst::ActionChain->from_chain($chain);
- $c->req->action("/${action}");
- $c->req->match("/${action}");
- $c->req->captures($captures);
+ $request->action("/${action}");
+ $request->match("/${action}");
+ $request->captures($captures);
$c->action($action);
$c->namespace( $action->namespace );
sub recurse_match {
my ( $self, $c, $parent, $path_parts ) = @_;
- my $children = $self->{children_of}{$parent};
+ my $children = $self->_children_of->{$parent};
return () unless $children;
+ my $best_action;
my @captures;
TRY: foreach my $try_part (sort { length($b) <=> length($a) }
keys %$children) {
}
my @try_actions = @{$children->{$try_part}};
TRY_ACTION: foreach my $action (@try_actions) {
+
+
if (my $capture_attr = $action->attributes->{CaptureArgs}) {
+ my $capture_count = $action->number_of_captures|| 0;
# Short-circuit if not enough remaining parts
- next TRY_ACTION unless @parts >= $capture_attr->[0];
+ next TRY_ACTION unless @parts >= $capture_count;
my @captures;
my @parts = @parts; # localise
# strip CaptureArgs into list
- push(@captures, splice(@parts, 0, $capture_attr->[0]));
+ push(@captures, splice(@parts, 0, $capture_count));
+
+ # check if the action may fit, depending on a given test by the app
+ next TRY_ACTION unless $action->match_captures($c, \@captures);
# try the remaining parts against children of this action
- my ($actions, $captures) = $self->recurse_match(
+ my ($actions, $captures, $action_parts, $n_pathparts) = $self->recurse_match(
$c, '/'.$action->reverse, \@parts
);
- if ($actions) {
- return [ $action, @$actions ], [ @captures, @$captures ];
+ # No best action currently
+ # OR The action has less parts
+ # OR The action has equal parts but less captured data (ergo more defined)
+ if ($actions &&
+ (!$best_action ||
+ $#$action_parts < $#{$best_action->{parts}} ||
+ ($#$action_parts == $#{$best_action->{parts}} &&
+ $#$captures < $#{$best_action->{captures}} &&
+ $n_pathparts > $best_action->{n_pathparts}))) {
+ my @pathparts = split /\//, $action->attributes->{PathPart}->[0];
+ $best_action = {
+ actions => [ $action, @$actions ],
+ captures=> [ @captures, @$captures ],
+ parts => $action_parts,
+ n_pathparts => scalar(@pathparts) + $n_pathparts,
+ };
}
- } else {
+ }
+ else {
{
local $c->req->{arguments} = [ @{$c->req->args}, @parts ];
next TRY_ACTION unless $action->match($c);
}
- push(@{$c->req->args}, @parts);
- return [ $action ], [ ];
+ my $args_attr = $action->attributes->{Args}->[0];
+ my $args_count = $action->comparable_arg_number;
+ my @pathparts = split /\//, $action->attributes->{PathPart}->[0];
+ # No best action currently
+ # OR This one matches with fewer parts left than the current best action,
+ # And therefore is a better match
+ # OR No parts and this expects 0
+ # The current best action might also be Args(0),
+ # but we couldn't chose between then anyway so we'll take the last seen
+ if (
+ !$best_action ||
+ @parts < @{$best_action->{parts}} ||
+ (
+ !@parts &&
+ defined($args_attr) &&
+ (
+ $args_count eq "0" &&
+ (
+ ($c->config->{use_chained_args_0_special_case}||0) ||
+ (
+ exists($best_action->{args_count}) && defined($best_action->{args_count}) ?
+ ($best_action->{args_count} ne 0) : 1
+ )
+ )
+ )
+ )
+ ){
+ $best_action = {
+ actions => [ $action ],
+ captures=> [],
+ parts => \@parts,
+ args_count => $args_count,
+ n_pathparts => scalar(@pathparts),
+ };
+ }
}
}
}
+ return @$best_action{qw/actions captures parts n_pathparts/} if $best_action;
return ();
}
return 0 unless @chained_attr;
- if (@chained_attr > 2) {
+ if (@chained_attr > 1) {
Catalyst::Exception->throw(
"Multiple Chained attributes not supported registering ${action}"
);
}
+ my $chained_to = $chained_attr[0];
- my $parent = $chained_attr[0];
-
- if (defined($parent) && length($parent)) {
- if ($parent eq '.') {
- $parent = '/'.$action->namespace;
- } elsif ($parent !~ m/^\//) {
- if ($action->namespace) {
- $parent = '/'.join('/', $action->namespace, $parent);
- } else {
- $parent = '/'.$parent; # special case namespace '' (root)
- }
- }
- } else {
- $parent = '/'
- }
-
- $action->attributes->{Chained} = [ $parent ];
+ Catalyst::Exception->throw(
+ "Actions cannot chain to themselves registering /${action}"
+ ) if ($chained_to eq '/' . $action);
- my $children = ($self->{children_of}{$parent} ||= {});
+ my $children = ($self->_children_of->{ $chained_to } ||= {});
my @path_part = @{ $action->attributes->{PathPart} || [] };
$part = $path_part[0];
} elsif (@path_part > 1) {
Catalyst::Exception->throw(
- "Multiple PathPart attributes not supported registering ${action}"
+ "Multiple PathPart attributes not supported registering " . $action->reverse()
);
}
if ($part =~ m(^/)) {
Catalyst::Exception->throw(
- "Absolute parameters to PathPart not allowed registering ${action}"
+ "Absolute parameters to PathPart not allowed registering " . $action->reverse()
);
}
- $action->attributes->{PartPath} = [ $part ];
+ my $encoded_part = URI->new($part)->canonical;
+ $encoded_part =~ s{(?<=[^/])/+\z}{};
+
+ $action->attributes->{PathPart} = [ $encoded_part ];
+
+ unshift(@{ $children->{$encoded_part} ||= [] }, $action);
- unshift(@{ $children->{$part} ||= [] }, $action);
+ $self->_actions->{'/'.$action->reverse} = $action;
- ($self->{actions} ||= {})->{'/'.$action->reverse} = $action;
+ if (exists $action->attributes->{Args} and exists $action->attributes->{CaptureArgs}) {
+ Catalyst::Exception->throw(
+ "Combining Args and CaptureArgs attributes not supported registering " .
+ $action->reverse()
+ );
+ }
unless ($action->attributes->{CaptureArgs}) {
- unshift(@{ $self->{endpoints} ||= [] }, $action);
+ unshift(@{ $self->_endpoints }, $action);
}
return 1;
my @captures = @$captures;
my $parent = "DUMMY";
my $curr = $action;
+ # If this is an action chain get the last action in the chain
+ if($curr->can('chain') ) {
+ $curr = ${$curr->chain}[-1];
+ }
while ($curr) {
- if (my $cap = $curr->attributes->{CaptureArgs}) {
- return undef unless @captures >= $cap->[0]; # not enough captures
- if ($cap->[0]) {
- unshift(@parts, splice(@captures, -$cap->[0]));
+ if (my $cap = $curr->number_of_captures) {
+ return undef unless @captures >= $cap; # not enough captures
+ if ($cap) {
+ unshift(@parts, splice(@captures, -$cap));
}
}
- if (my $pp = $curr->attributes->{PartPath}) {
+ if (my $pp = $curr->attributes->{PathPart}) {
unshift(@parts, $pp->[0])
if (defined($pp->[0]) && length($pp->[0]));
}
$parent = $curr->attributes->{Chained}->[0];
- $curr = $self->{actions}{$parent};
+ $curr = $self->_actions->{$parent};
}
return undef unless $parent eq '/'; # fail for dangling action
return undef if @captures; # fail for too many captures
return join('/', '', @parts);
-
+
+}
+
+=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;
+1;
+
=head1 USAGE
=head2 Introduction
'-----------------------+------------------------------'
...
-Here's a more detailed specification of the attributes belonging to
+Here's a more detailed specification of the attributes belonging to
C<:Chained>:
=head2 Attributes
C</foo/bar/...>. If you don't specify C<:PathPart> it has the same
effect as using C<:PathPart>, it would default to the action name.
+=item PathPrefix
+
+Sets PathPart to the path_prefix of the current controller.
+
=item Chained
Has to be specified for every child in the chain. Possible values are
-absolute and relative private action paths, with the relatives pointing
-to the current controller, or a single slash C</> to tell Catalyst that
-this is the root of a chain. The attribute C<:Chained> without aguments
-also defaults to the C</> behavior.
+absolute and relative private action paths or a single slash C</> to
+tell Catalyst that this is the root of a chain. The attribute
+C<:Chained> without arguments also defaults to the C</> behavior.
+Relative action paths may use C<../> to refer to actions in parent
+controllers.
Because you can specify an absolute path to the parent action, it
doesn't matter to Catalyst where that parent is located. So, if your
C</foo/bar>. That action chains directly to C</>, so the C</bar/*/baz/*>
chain comes out as the end product.
+=item ChainedParent
+
+Chains an action to another action with the same name in the parent
+controller. For Example:
+
+ # in MyApp::Controller::Foo
+ sub bar : Chained CaptureArgs(1) { ... }
+
+ # in MyApp::Controller::Foo::Moo
+ sub bar : ChainedParent Args(1) { ... }
+
+This builds a chain like C</bar/*/bar/*>.
+
=item CaptureArgs
Must be specified for every part of the chain that is not an
attribute) but has no C<:CaptureArgs> attribute is treated by Catalyst
as a chain end.
+Allowed values for CaptureArgs is a single integer (CaptureArgs(2), meaning two
+allowed) or you can declare a L<Moose>, L<MooseX::Types> or L<Type::Tiny>
+named constraint such as CaptureArgs(Int,Str) would require two args with
+the first being a Integer and the second a string. You may declare your own
+custom type constraints and import them into the controller namespace:
+
+ package MyApp::Controller::Root;
+
+ use Moose;
+ use MooseX::MethodAttributes;
+ use MyApp::Types qw/Int/;
+
+ extends 'Catalyst::Controller';
+
+ sub chain_base :Chained(/) CaptureArgs(1) { }
+
+ sub any_priority_chain :Chained(chain_base) PathPart('') Args(1) { }
+
+ sub int_priority_chain :Chained(chain_base) PathPart('') Args(Int) { }
+
+If you use a reference type constraint in CaptureArgs, it must be a type
+like Tuple in L<Types::Standard> that allows us to determine the number of
+args to match. Otherwise this will raise an error during startup.
+
+See L<Catalyst::RouteMatching> for more.
+
=item Args
By default, endpoints receive the rest of the arguments in the path. You
C<@_> after the context object. They can also be reached through
C<$c-E<gt>request-E<gt>arguments>.
+You should see 'Args' in L<Catalyst::Controller> for more details on using
+type constraints in your Args declarations.
+
=back
=head2 Auto actions, dispatching and forwarding
C<auto> actions will be run before the chain dispatching begins. In
every other aspect, C<auto> actions behave as documented.
-The C<forward>ing to other actions does just what you would expect. But if
-you C<detach> out of a chain, the rest of the chain will not get called
-after the C<detach>.
+The C<forward>ing to other actions does just what you would expect. i.e.
+only the target action is run. The actions that that action is chained
+to are not run.
+If you C<detach> out of a chain, the rest of the chain will not get
+called after the C<detach>.
+
+=head2 match_captures
+
+A method which can optionally be implemented by actions to
+stop chain matching.
+
+See L<Catalyst::Action> for further details.
-=head1 AUTHOR
+=head1 AUTHORS
-Matt S Trout <mst@shadowcatsystems.co.uk>
+Catalyst Contributors, see Catalyst.pm
=head1 COPYRIGHT
-This program is free software, you can redistribute it and/or modify it under
+This library is free software. You can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
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