#!/bin/bash
# convert flags from http://www.maxmind.com/flag.zip into pngs

if [ ! -r "$1" -o ! -d "$2" ]; then
	echo "Usage: $0 flag.zip <destination directory>"
	exit 1
fi

from="$1"
to="$2"
convert=`which convert`
unzip=`which unzip`

if [ ! -x "$convert" ]; then
	echo "you need the convert program from ImageMagick"
	exit 1
fi
if [ ! -x "$unzip" ]; then
	echo "you need the unzip program"
	exit 1
fi

set -e

unzip "$from" -d "$to"

cd "$to"
for i in flag/*.gif; do
	flag=${i##*/}
	flag=${flag%gif}png
	convert $i $flag
	rm $i
done
rmdir flag