#!/usr/bin/perl

use strict;
use warnings;
use diagnostics;

use File::Find;
use Date::Format;
use Date::Parse;

sub process {
    if (-f $_ && /\.html$/) {
	my $fn = $_;

	open(F, "<:utf8", $fn) or die("Cannot open ${File::Find::name}: $!");

	my @file = <F>;
	chomp(@file);
	close F;

	(my $date) = grep m%\w+, \w+ \d\d, \d\d\d\d%, @file;
	$date =~ m%\w+, (\w+ \d\d, \d\d\d\d)%;
	my $time = str2time($1);

	my ($in_text, $in_subject) = undef;
	my ($text, $subject) = "";
READ:	foreach (@file) {
	    if (m%<h3 class="post-title">%) { # Subject
		$in_subject = 1;
	    } elsif ($in_subject && $_ !~ m%</h3>%) {
		$subject = $_ if /\w/;
	    } elsif ($in_subject && $_ =~ m%</h3>%) {
		$in_subject = undef;
		$text = "$subject\n";
	    } elsif (m%<div class="post-body">%) { # Text
		$in_text = 1;
	    } elsif ($in_text && $_ !~ m%</div>%) { 
		$text .= $_ . "\n";
	    } elsif ($in_text && $_ =~ m%</div>%) {
		last READ;
	    }
	}

	$text =~ s/(\r|<p>|<\/p>|^\s*)//gm;
	$fn =~ s/html$/txt/;

	open(OUT, ">:encoding(iso-8859-15)", "/home/hynek/old-blog/new/$fn") or die "Cannot open for write: $!.";
	print OUT $text;
	close(OUT);
	utime $time, $time, ("/home/hynek/old-blog/new/$fn");
    }
}

find(\&process, ("tmp"));