#!/bin/sh
#
# 2012 Steven Armstrong (steven-cdist at armstrong.cc)
#
# This file is part of cdist.
#
# cdist 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.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#

user="$(cat "$__object/parameter/user" 2>/dev/null || echo "$__object_id")"
state_should="$(cat "$__object/parameter/state")"

os_version="$(cat "$__global/explorer/os_version")"
case "$os_version" in
    SUSE\ Linux\ Enterprise\ Server\ 11*VERSION\ =\ 11*)
        old=yes
        addparam="-A"
        delparam="-R"
    ;;
    *)
        old=no
        addparam="-a"
        delparam="-d"
    ;;
esac

mkdir "$__object/files"
# file has to be sorted for comparison with `comm`
sort "$__object/parameter/group" > "$__object/files/group.sorted"

case "$state_should" in
   present)
      changed_groups="$(comm -13 "$__object/explorer/group" "$__object/files/group.sorted")"
      action="$addparam"
   ;;
   absent)
      changed_groups="$(comm -12 "$__object/explorer/group" "$__object/files/group.sorted")"
      action="$delparam"
   ;;
esac

if [ -z "$changed_groups" ]; then
   # Nothing to do, move along
   exit 0
fi

for group in $changed_groups; do
   if [ "$old" = "no" ]; then
     echo "gpasswd $action \"$user\" \"$group\""
   else
     echo "usermod $action \"$group\" \"$user\""
   fi
done