#!/bin/sh
LINES=$(sed -n '/<key>DeviceName<\/key>/=' preferences.plist)
NO=$(wc -l preferences.plist | cut -d ' ' -f 1)
LINES="$LINES $NO"
PAIR=""
STRLINES=""
for l in $LINES; do
	if [ -n "$PAIR" ]; then
		PAIR="$PAIR,$(( l - 1 ))"
		STRLINES="$STRLINES $(sed -n "$PAIR {/<string>ip1<\/string>/=}" preferences.plist)"
	fi
	PAIR="$l"
done
STRLINES="$(echo $STRLINES | cut -d ' ' -f 1)"
INSERTAT=""
for l in $(seq $STRLINES $NO); do
	INSERTAT=$(sed -n "$l,$l {/<\/dict>/=}" preferences.plist)
	if [ -n "$INSERTAT" ]; then
		break
	fi
done
if [ -z "$INSERTAT" ]; then
	echo "No insert position found." 1>&2
	exit 1;
fi
NEXTLINE=`sed -n "$((INSERTAT + 1)),$((INSERTAT + 1)) {/<key>Proxies<\/key>/=}" preferences.plist`
if [ -n "$NEXTLINE" ]; then
	echo "preferences.list already modified." 1>&2
	exit 1;
fi
cp preferences.plist preferences.plist.bak
head -n $INSERTAT preferences.plist > /tmp/preferences.plist.head
tail -n +$((INSERTAT + 1)) preferences.plist > /tmp/preferences.plist.tail
echo "			<key>Proxies</key>" > /tmp/preferences.plist.middle
echo "			<dict>" >> /tmp/preferences.plist.middle
echo "				<key>HTTPEnable</key>" >> /tmp/preferences.plist.middle
echo "				<integer>1</integer>" >> /tmp/preferences.plist.middle
echo "				<key>HTTPPort</key>" >> /tmp/preferences.plist.middle
echo "				<integer>8118</integer>" >> /tmp/preferences.plist.middle
echo "				<key>HTTPProxy</key>" >> /tmp/preferences.plist.middle
echo "				<string>localhost</string>" >> /tmp/preferences.plist.middle
echo "				<key>HTTPProxyType</key>" >> /tmp/preferences.plist.middle
echo "				<integer>1</integer>" >> /tmp/preferences.plist.middle
echo "				<key>HTTPSEnable</key>" >> /tmp/preferences.plist.middle
echo "				<integer>1</integer>" >> /tmp/preferences.plist.middle
echo "				<key>HTTPSPort</key>" >> /tmp/preferences.plist.middle
echo "				<integer>8118</integer>" >> /tmp/preferences.plist.middle
echo "				<key>HTTPSProxy</key>" >> /tmp/preferences.plist.middle
echo "				<string>localhost</string>" >> /tmp/preferences.plist.middle
echo "				<key>ProxyAutoConfigEnable</key>" >> /tmp/preferences.plist.middle
echo "				<integer>0</integer>" >> /tmp/preferences.plist.middle
echo "			</dict>" >> /tmp/preferences.plist.middle
cat /tmp/preferences.plist.head /tmp/preferences.plist.middle /tmp/preferences.plist.tail > preferences.plist
rm /tmp/preferences.plist.head /tmp/preferences.plist.middle /tmp/preferences.plist.tail