package Dist::Zilla::Role::TextTemplate 6.031;
# ABSTRACT: something that renders a Text::Template template string

use Moose::Role;

use Dist::Zilla::Pragmas;

use namespace::autoclean;

#pod =head1 DESCRIPTION
#pod
#pod Plugins implementing TextTemplate may call their own C<L</fill_in_string>>
#pod method to render templates using L<Text::Template|Text::Template>.
#pod
#pod =cut

use Text::Template;

#pod =attr delim
#pod
#pod This attribute (which can't easily be set!) is a two-element array reference
#pod returning the Text::Template delimiters to use.  It defaults to C<{{> and
#pod C<}}>.
#pod
#pod =cut

# XXX: Later, add a way to set this in config. -- rjbs, 2008-06-02
has delim => (
  is   => 'ro',
  isa  => 'ArrayRef',
  lazy => 1,
  init_arg => undef,
  default  => sub { [ qw(  {{  }}  ) ] },
);

#pod =method fill_in_string
#pod
#pod   my $rendered = $plugin->fill_in_string($template, \%stash, \%arg);
#pod
#pod This uses Text::Template to fill in the given template using the variables
#pod given in the C<%stash>.  The stash becomes the HASH argument to Text::Template,
#pod so scalars must be scalar references rather than plain scalars.
#pod
#pod C<%arg> is dereferenced and passed in as extra arguments to Text::Template's
#pod C<new> routine.
#pod
#pod =cut

sub fill_in_string {
  my ($self, $string, $stash, $arg) = @_;

  $self->log_fatal("Cannot use undef as a template string")
    unless defined $string;

  my $tmpl = Text::Template->new(
    TYPE       => 'STRING',
    SOURCE     => $string,
    DELIMITERS => $self->delim,
    BROKEN     => sub { my %hash = @_; die $hash{error}; },
    %$arg,
  );

  $self->log_fatal("Could not create a Text::Template object from:\n$string")
    unless $tmpl;

  my $content = $tmpl->fill_in(%$arg, HASH => $stash);

  $self->log_fatal("Filling in the template returned undef for:\n$string")
    unless defined $content;

  return $content;
}

1;

__END__

=pod

=encoding UTF-8

=head1 NAME

Dist::Zilla::Role::TextTemplate - something that renders a Text::Template template string

=head1 VERSION

version 6.031

=head1 DESCRIPTION

Plugins implementing TextTemplate may call their own C<L</fill_in_string>>
method to render templates using L<Text::Template|Text::Template>.

=head1 PERL VERSION

This module should work on any version of perl still receiving updates from
the Perl 5 Porters.  This means it should work on any version of perl
released in the last two to three years.  (That is, if the most recently
released version is v5.40, then this module should work on both v5.40 and
v5.38.)

Although it may work on older versions of perl, no guarantee is made that the
minimum required version will not be increased.  The version may be increased
for any reason, and there is no promise that patches will be accepted to
lower the minimum required perl.

=head1 ATTRIBUTES

=head2 delim

This attribute (which can't easily be set!) is a two-element array reference
returning the Text::Template delimiters to use.  It defaults to C<{{> and
C<}}>.

=head1 METHODS

=head2 fill_in_string

  my $rendered = $plugin->fill_in_string($template, \%stash, \%arg);

This uses Text::Template to fill in the given template using the variables
given in the C<%stash>.  The stash becomes the HASH argument to Text::Template,
so scalars must be scalar references rather than plain scalars.

C<%arg> is dereferenced and passed in as extra arguments to Text::Template's
C<new> routine.

=head1 AUTHOR

Ricardo SIGNES 😏 <cpan@semiotic.systems>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2023 by Ricardo SIGNES.

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