#!/usr/bin/env perl
use strict;
use warnings;

use File::Cat;
use File::Slurp;
use Text::Markdown "markdown";

sub page {
	my ($pageFile, $pageTitle, $pageContent, $pageType, $id) = @_;
	unless(defined $pageType) {
		$pageType = "body"; # default page type 
	}
	open my $outHandle, ">>", "output/$pageFile";
	# Write header and insert page title
	open my $inHandle, "<", "template/header.html";
	while(<$inHandle>) {
		$_ =~ s/\$title/$pageTitle/;
		print $outHandle $_;
	}
	close $inHandle;
	# Write content and footer
	if(defined $id) {
		print $outHandle "<$pageType id=\"$id\">";
	}
	else {
		print $outHandle "<$pageType>";
	}
	print $outHandle $pageContent;
	print $outHandle "</$pageType>";
	cat "template/footer.html", $outHandle;
	close $outHandle;
	
	# Create gzip version
	`gzip -k output/$pageFile`;
}

# Build about
print "Building about\n";
my $aboutContent = read_file "static/about.md";
$aboutContent = markdown $aboutContent;
page "about.html", "About", $aboutContent;

# Build articles
my @articleList;
while(<*.md>) {
	my $articleFile = $_;
	print "Processing $articleFile\n";

	# Extract article title from the title in MD article
	open my $articleHandle, "<", $articleFile;
	my $headLine = <$articleHandle>;
	$headLine = substr $headLine, 2, -1;
	close $articleHandle;

	# Extract output file name: MD file name without the date
	my $pageFile = substr $articleFile, 9, -3;
	$pageFile .= ".html";

	# Build article
	my $articleContent = read_file $articleFile;
	$articleContent = markdown $articleContent;
	page $pageFile, $headLine, $articleContent, "article";

	# Add article to index
	my $year = substr $articleFile, 0, 4;
	my $month = substr $articleFile, 4, 2;
	my $day = substr $articleFile, 6, 2;
	push @articleList, "* [$month-$day-$year $headLine]($pageFile \"$headLine\")\n";
}

# Build index with article list in reverse (most recent first)
print "Building index\n";
my $indexContent = read_file "static/index.md";
foreach(reverse @articleList) {
	$indexContent .= $_;
}
$indexContent = markdown $indexContent;
page "index.html", "blog.vdouillet.fr", $indexContent, "body", "index-body";