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#!/usr/bin/env perl
#
# Copyright (c) 2022 Omar Polo <op@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
use v5.10;
use strict;
use warnings;
my $in_pre = 0;
my $in_list = 0;
while (<>) {
chomp;
if ($in_pre && m/^```/) {
$in_pre = 0;
say "</pre>";
} elsif (!$in_pre && m/^```/) {
if ($in_list) {
$in_list = 0;
say "</ul>";
}
$in_pre = 1;
print "<pre>";
} elsif ($in_pre) {
say san($_);
} elsif ($in_list && m/^$/) {
say "</ul>";
$in_list = 0;
} elsif (m/^\*\s+(.*)/) { # NB: at least one space
if (!$in_list) {
$in_list = "item";
say "<ul>";
} elsif ($in_list eq "link") {
$in_list = "item";
say "</ul>";
say "<ul>";
}
output("li", $1);
} elsif (m/^=>\s*([^\s]*)\s*(.*)$/) {
my $href = $1;
my $alt = $2;
# special case: images
if ($1 =~ /\.(png|jpg|svg)$/) {
if ($in_list) {
say "</ul>";
$in_list = 0;
}
say "<img src='$href' alt='$alt' />";
next;
}
if (!$in_list) {
$in_list = "link";
say "<ul class='link-list'>";
} elsif ($in_list eq "item") {
$in_list = "link";
say "</ul>";
say "<ul class='link-list'>";
}
$_ = $alt || $href;
say "<li><a href='$href'>". san() ."</a></li>";
} elsif (m/^###\s*(.*)$/) {
output("h3", $1);
} elsif (m/^##\s*(.*)$/) {
output("h2", $1);
} elsif (m/^#\s*(.*)$/) {
output("h1", $1);
} elsif (m/^>\s*(.*)$/) {
output("blockquote", $1);
} else {
output("p", $_);
}
}
sub san {
s/&/\&/g;
s/</\</g;
s/>/\>/g;
return $_;
}
sub output {
my ($tn, $content) = @_;
if (!$in_list && $tn eq "li") {
$in_list = 1;
say "<ul>";
}
if ($in_list && $tn ne "li") {
$in_list = 0;
say "</ul>";
}
if ($tn eq "p" && $content eq "") {
return;
}
$_ = $content;
say "<$tn>". san() ."</$tn>";
}
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