#!/bin/sh

# Get images for a Rubik's cube state from http://cube.rider.biz/visualcube.php
# Can be used with a local installation of visualcube.

# Usage: cubeviz [type] [alg]
# See usage() for details
# Requires: curl, ImageMagick

visualcube="http://cube.rider.biz/visualcube.php"

usage() {
	echo "Usage: cubeviz [type] [alg]"
	echo "Types: trigger"
	echo "Alg: use the standard notation"
}

trigger() {
	alg="$(echo "$1" | tr "'" "3" | tr -d " ")"
	w="wwwwwwwww"
	y="yyyyyyyyy"
	l="lllllllll"
	d="ddddddddd"
	t="ttttttttt"
	ud="$visualcube?fmt=svg&fc=$y$l$l$y$l$l&size=200&view=plan"
	top="$ud&alg=$alg"
	bottom="$ud&alg=${alg}x2"
	s="$visualcube?fmt=svg&fc=$y$t$t$y$t$t&size=200&r=y30x-30"
	side="$s&co=30&alg=$alg"

	d="pics_tmp"
	f="trigger_$alg.png"

	# We need some temporary files because visualcube is broken
	# on Conrad's website and cannot output formats other than svg.
	mkdir "$d"
	curl "$top"    > $d/top.svg
	curl "$bottom" > $d/bottom.svg
	curl "$side"   > $d/side.svg

	c="convert -density 400"
	$c $d/top.svg $d/top.png
	$c $d/bottom.svg $d/bottom.png
	$c $d/side.svg $d/side.png

	montage -tile 2x2 -mode concatenate \
		$d/top.png $d/side.png $d/bottom.png $f

	rm -r "$d"
}

[ -z "$2" ] && usage && exit 1

case "$1" in
	trigger)
		trigger "$2"
		;;
	*)
		usage
		exit 1
		;;
esac