#!/usr/bin/perl

# reorganize frontmatter

use warnings;
use strict;

use Path::Tiny;
use HTML::HTML5::Entities;

my $infile = shift;
my $outfile = shift || $infile;

$_ = path($infile)->slurp_utf8;

# swap sections → Copyright, TOC, Foreword, Preface
s|^((?:.*?\n)?)(= Preface(?:(?!\n=).)*\n)(= Copyright(?:(?!\n=).)*\n)(= Table(?:(?!\n=).)*\n)(= Foreword(?:(?!\n=).)*\n)(=.*)$|$1$3$4$5$2$6|s;

# drop section Copyright
s|^((?:.*?\n)?)(= Copyright(?:(?!\n=).)*\n)(=.*)$|$1$3|s;

path($outfile)->spew_utf8($_);

1;