#!/bin/sh

set -e

case "$1" in
    purge)
	update-rc.d metaproxy remove >/dev/null

	# copy of metaproxy.user, which is gone at this point
	SERVER_HOME=/var/metaproxy
	SERVER_USER=metaproxy
	SERVER_NAME="Metaproxy user"
	SERVER_GROUP=metaproxy

        # find first and last SYSTEM_UID numbers
        for LINE in `grep SYSTEM_UID /etc/adduser.conf | grep -v "^#"`; do
            case $LINE in
		FIRST_SYSTEM_UID*)
                    FIRST_SYSTEM_UID=`echo $LINE | cut -f2 -d '='`
                    ;;
		LAST_SYSTEM_UID*)
                    LAST_SYSTEM_UID=`echo $LINE | cut -f2 -d '='`
                    ;;
		*)
                    ;;
            esac
        done
        # Remove system account if necessary
        CREATEDUSER=$SERVER_USER
        if [ -n "$FIRST_SYSTEM_UID" ] && [ -n "$LAST_SYSTEM_UID" ]; then
            if USERID=`getent passwd $CREATEDUSER | cut -f 3 -d ':'`; then
		if [ -n "$USERID" ]; then
		    if [ "$FIRST_SYSTEM_UID" -le "$USERID" ] && \
			[ "$USERID" -le "$LAST_SYSTEM_UID" ]; then
			echo -n "Removing $CREATEDUSER system user.."
			deluser --quiet $CREATEDUSER || true
			echo "..done"
		    fi
		fi
            fi
	fi
        # Remove system group if necessary
	CREATEDGROUP=$SERVER_GROUP
	FIRST_USER_GID=`grep ^USERS_GID /etc/adduser.conf | cut -f2 -d '='`
	if [ -n "$FIRST_USER_GID" ]; then
            if GROUPGID=`getent group $CREATEDGROUP | cut -f 3 -d ':'`; then
		if [ -n "$GROUPGID" ]; then
		    if [ "$FIRST_USER_GID" -gt "$GROUPGID" ]; then
			echo -n "Removing $CREATEDGROUP group.."
			delgroup --only-if-empty $CREATEDGROUP || true
			echo "..done"
		    fi
		fi
            fi
	fi
	;;
esac