#!/usr/bin/env perl

use strict;
use utf8;
use Getopt::Std;
use File::Slurp;
use Text::FrontMatter::YAML;

$::VERSION = "2.0.0";

getopts("ne", \my %opts);

my $metavar;
if (defined $opts{n}) {
    # "new" post
    $metavar = "created";
} elsif (defined $opts{e}) {
    # "edited" post
    $metavar = "modified";
} else {
    die "Neither -n[ew] nor -e[dited] are defined!";
}

my $timestamp = time;

my $fname = shift @ARGV;

my $fdata = read_file($fname);
my $mdfm = Text::FrontMatter::YAML->new(
    document_string => $fdata
);

my $metadata = $mdfm->frontmatter_hashref;
$metadata->{$metavar} = $timestamp;

my $wrfm = Text::FrontMatter::YAML->new(
    frontmatter_hashref => $metadata,
    data_text => $mdfm->data_text
);

write_file($fname, $wrfm->document_string);

1;