arcnyxx.net.git

#!/bin/sh
# snail - markdown compiler
# Copyright (C) 2024 ArcNyxx <me@arcnyxx.net>
# see LICENCE file for licensing information

get() {
	printf "%s\n" "${2#??}" | cut "-d${3:- }" "-f$1"
}

read -r TITLE
read -r SUBTITLE
read -r META
read -r DATE

[ "$DATE" ] && { DATE="<p><time>$DATE</time></p>" ; read -r NULL ; } || DATE=''

# sed command removes html tags and contents
printf "`cat head.html`\n" \
        "`./snail "$META" | sed 's|<[^>]*>||g'`" \
        "`./snail "$TITLE" | sed 's|<[^>]*>||g'`" \
        "`./snail "$TITLE"`" "`./snail "$SUBTITLE"`" "$DATE"

MODE=
while IFS= read -r LINE ; do
	if [ -z "$LINE" ] ; then
		echo '</section>\n<section>'
	elif [ "${LINE#\ !}" != "$LINE" ] ; then
		echo "<h1>`./snail "${LINE#??}"`</h1>"
	elif [ "${LINE#\ \?}" != "$LINE" ] ; then
		echo "<h2>`./snail "${LINE#??}"`</h2>"
	elif [ "${LINE#\ #}" != "$LINE" ] ; then
		printf "%s %s\n" "<img src='`get 1 "$LINE"`'" \
			"alt='`./snail \`get 2 "$LINE"\``'>"
	elif [ "${LINE#\ ^}" != "$LINE" ] ; then
		echo '<video controls>'
		printf "%s %s\n" "<source src='`get 1 "$LINE"`'" \
			"type='video/mp4' alt='`./snail \`get 2 "$LINE"\``'>"
		echo '</video>'
	elif [ "${LINE#\ \~}" != "$LINE" ] ; then
		printf "%s %s\n" "<object data='`get 1 "$LINE"`'" \
			"type='application/pdf' height='80%'>"
		printf "%s%s\n" "<a href='`get 1 "$LINE"`'>" \
			"`./snail \`get 2 "$LINE"\``</a>"
		echo '</object>'
	elif [ "${LINE#\ \ }" != "$LINE" ] ; then
		if [ "$MODE" != '</ul>' ] ; then
			[ "$MODE" ] && echo "$MODE"
			echo "<ul class='l'>"
			MODE='</ul>'
		fi
		echo "<li>`./snail "${LINE#??}"`</li>"
	elif [ "${LINE#\ -}" != "$LINE" ] ; then
		if [ "$MODE" != '</ul>' ] ; then
			[ "$MODE" ] && echo "$MODE"
			echo '<ul>'
			MODE='</ul>'
		fi
		echo "<li>`./snail "${LINE#??}"`</li>"
	elif [ "${LINE#\ \`}" != "$LINE" ] ; then
		LINE="${LINE#??}"
		if [ "$MODE" != '</code></pre>' ] ; then
			if [ "`printf '%s' "$LINE" | head -c 1`" = '\' \
					-a "`printf '%s' "${LINE#??}" | \
					head -c 1`" != '\' ] ; then
				CLASS=" class='`printf '%s' "${LINE#?}" \
					| head -c 1`'"
				LINE="${LINE#??}"
			elif [ "`printf '%s' "$LINE" | head -c 2`" \
					= '\\' ] ; then
				LINE="${LINE#?}"
			fi
			printf "%s" "<pre><code$CLASS>"
			MODE='</code></pre>'
		fi
		printf "%s\n" "`./snail "$LINE"`"
	elif [ "${LINE#\ \$}" != "$LINE" ] ; then
		printf '<article>\n<div>\n'
		printf "%s%s\n" "<h1><a href='`get 1 "$LINE" \|`'>" \
			"`get 3 "$LINE" \|`</a></h1>"
		printf '</div>\n<div>\n'
		printf "%s\n" "<p>`get 4 "$LINE" \|`</p>"
		printf "%s\n" "<p>(<time>`get 2 "$LINE" \|`</time>)</p>"
		printf '</div>\n</article>\n'
	else
		if [ "$MODE" ] ; then
			echo "$MODE"
			MODE=
		fi
		printf "%s\n" "<p>`./snail "$LINE"`</p>"
	fi
done

cat foot.html