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package Path::Dispatcher::Dispatch;
# ABSTRACT: a list of matches
our $VERSION = '1.08';
use Moo;
use MooX::TypeTiny;
use Try::Tiny;
use Carp qw(confess);
use Types::Standard qw(ArrayRef);
use Path::Dispatcher::Match;
has _matches => (
is => 'ro',
isa => ArrayRef,
default => sub { [] },
);
sub add_match {
my $self = shift;
$_->isa('Path::Dispatcher::Match')
or confess "$_ is not a Path::Dispatcher::Match"
for @_;
push @{ $self->{_matches} }, @_;
}
sub matches { @{ shift->{_matches} } }
sub has_match { scalar @{ shift->{_matches} } }
sub first_match { shift->{_matches}[0] }
# aliases
sub add_matches { goto \&add_match }
sub has_matches { goto \&has_match }
sub run {
my $self = shift;
my @args = @_;
my @matches = $self->matches;
my @results;
while (my $match = shift @matches) {
my $exception;
try {
local $SIG{__DIE__} = 'DEFAULT';
push @results, $match->run(@args);
# we always stop after the first match UNLESS they explicitly
# ask to continue on to the next rule
die "Path::Dispatcher abort\n";
}
catch {
$exception = $_;
};
last if $exception =~ /^Path::Dispatcher abort\n/;
next if $exception =~ /^Path::Dispatcher next rule\n/;
die $exception;
}
return @results if wantarray;
return $results[0];
}
__PACKAGE__->meta->make_immutable;
no Moo;
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Path::Dispatcher::Dispatch - a list of matches
=head1 VERSION
version 1.08
=head1 SYNOPSIS
my $dispatcher = Path::Dispatcher->new(
rules => [
Path::Dispatcher::Rule::Tokens->new(
tokens => [ 'attack', qr/^\w+$/ ],
block => sub { attack(shift->pos(2)) },
),
],
);
my $dispatch = $dispatcher->dispatch("attack goblin");
$dispatch->matches; # list of matches (in this case, one)
$dispatch->has_matches; # whether there were any matches
$dispatch->run; # attacks the goblin
=head1 DESCRIPTION
Dispatching creates a C<dispatch> which is little more than a (possibly empty!)
list of matches.
=head1 ATTRIBUTES
=head2 matches
The list of L<Path::Dispatcher::Match> that correspond to the rules that were
matched.
=head1 METHODS
=head2 run
Executes the first match.
Each match's L<Path::Dispatcher::Match/run> method is evaluated in scalar
context. The return value of this method is a list of these scalars (or the
first if called in scalar context).
=head1 SUPPORT
Bugs may be submitted through L<the RT bug tracker|https://rt.cpan.org/Public/Dist/Display.html?Name=Path-Dispatcher>
(or L<bug-Path-Dispatcher@rt.cpan.org|mailto:bug-Path-Dispatcher@rt.cpan.org>).
=head1 AUTHOR
Shawn M Moore, C<< <sartak at bestpractical.com> >>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2020 by Shawn M Moore.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
