# Xerl (c) 2005-2011, 2013-2015 by Paul Buetow
#
# 	E-Mail: xerl@dev.buetow.org 	WWW: https://xerl.buetow.org
#
# This is free software, you may use it and distribute it under the same
# terms as Perl itself.

package Xerl::XML::SAXHandler;

use base qw(XML::SAX::Base);

use strict;
use warnings;

use 5.14.0;

use Data::Dumper;

use Xerl::Base;
use Xerl::XML::Element;

sub start_document {
  my ( $self, $doc ) = @_;

  $self->{xerl}{root}    = undef;
  $self->{xerl}{current} = undef;
  $self->{xerl}{stack}   = [];

  return undef;
}

sub start_element {
  my ( $self, $doc ) = @_;
  my $x = $self->{xerl};

  if ( defined $x->{current} ) {
    push @{ $x->{stack} }, $x->{current};
    $x->{root} = $x->{current} unless defined $x->{root};
  }

  my %params = map { $_->{Name} => $_->{Value} } values %{ $doc->{Attributes} };

 # Extract name and flags from a tag such as: <NAME.xerl.FLAG1.FLAG2.FLAGN...>..
  my ( $name, @flags ) = _GET_NAME_N_FLAG( $doc->{Name} );

  $x->{current} = Xerl::XML::Element->new();
  $x->{current}->set_text('');
  $x->{current}->set_name($name);
  $x->{current}->set( "flag_$_", 1 ) for @flags;
  $x->{current}->set_params( \%params ) if %params;

  ${ $x->{stack} }[-1]->push_array( $x->{current} ) if @{ $x->{stack} };

  return undef;
}

sub characters {
  my ( $self, $doc ) = @_;
  my $x = $self->{xerl};

  my $data = $doc->{Data};
  $data =~ s/!!LT!!/</g;
  $data =~ s/!!GT!!/>/g;
  $data =~ s/!!N!!/&/g;

  $x->{current}{text} .= $data;

  return undef;
}

sub end_element {
  my ( $self, $doc ) = @_;
  my $x = $self->{xerl};

  $x->{current} = pop @{ $x->{stack} };

  return undef;
}

sub _GET_NAME_N_FLAG ($) {
  my $string = shift;

  my ( $name, $flags ) = $string =~ /^(.+)\.xerl\.(.*)$/;

  if ( defined $flags ) {
    return ( $name, split( /\./, $flags ) );
  }
  else {
    return ($string);
  }
}

1;