#!/bin/sh
# Copyright (C) 2015  Bogatov Dmitry <KAction@gnu.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

hostname="$__object_id"
state="$(cat "$__object/parameter/state")"

# First remove all lines for given hostname and then insert again.
# Otherwise, we risk having multiple entries for same hostname.
#
# There is a corner case, which we do not handle. Namely, /etc/hosts
# format allows several host names on single line, like following:
#
#     192.168.15.16 foo bar
#
# If this type manages hostname `foo', then hostname bar will get erased.

__line "__hosts/delete/${hostname}" \
       --state absent               \
       --regex " ${hostname}[ ]*$"  \
       --file /etc/hosts
export require="__line/__hosts/delete/${hostname}"

case "$state" in
    absent)
        : # Nothing to do
        ;;
    present)
        ip="$(cat "$__object/parameter/ip")"
        __line "__hosts/insert/${hostname}" \
               --line "${ip} ${hostname}"   \
               --file /etc/hosts
        ;;
    *)
        echo "ERROR: type (${__type##*/}) does not support state \`$state'"
        exit 1
esac