#!/usr/bin/env sh

IFS='    '

cat SOURCES |
while read region htmlurl ; do

	html="html/$region.html"
	svg="svg/$region.svg"
	png="png/$region.png"

	if ! test -s "$html"; then
		rm -f "$html" "$svg" "$png"
		echo "Downloading:	$region	$htmlurl"
		if ! wget -q -O "$html" "${htmlurl}"; then
			echo "ERROR: failed downloading html: ${htmlurl}"
			continue
		fi
		if ! grep -q public_domain $html; then
			echo "WARNING: flag NOT in public domain; check license"
		fi
	fi

	if ! test -s "$svg"; then
		svgurl=`cat "$html" | LANG=C sed 's@.*href="\(https://upload.wikimedia.org/wikipedia/commons/[^"]*[.]svg\)".*@\1@' | grep '^https://upload.wikimedia.org' | grep -v '/archive/' | head -n1`
		if test "x$svgurl" = x; then
			echo "ERROR: cannot find SVG URL in $html"
			continue
		fi
		svgdata="`wget -q -O - "$svgurl"`"
		if test "x$svgdata" = x; then
			echo "ERROR: failed downloading SVG: $svgurl"
			continue
		fi
		echo "$svgdata" > $svg.dos
		if ! (dos2unix -q $svg.dos || fromdos $svg.dos); then
			echo "ERROR: dos2unix failed."
			#XXX rm -f $svg.dos
			continue
		else
			mv $svg.dos $svg
		fi
	fi

	if ! test -s "$png"; then
		if ! rsvg-convert $svg > $png.tmp; then
			echo "ERROR rsvg-convert failed."
			rm -f $png.tmp
			continue
		fi
		if !  optipng -quiet $png.tmp; then
			echo "ERROR: optipng failed."
			rm -f $png.tmp
			continue
		else
			mv $png.tmp $png
		fi
	fi

done