#!/bin/sh
#
# 2011 Steven Armstrong (steven-cdist at armstrong.cc)
# 2012 Nico Schottelius (nico-cdist at schottelius.org)
#
# 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/>.
#

key="$__object_id"
[ -f "$__object/parameter/key" ] && key="$(cat "$__object/parameter/key")"

state_should="$(cat "$__object/parameter/state")"

file="$(cat "$__object/parameter/file")"
delimiter="$(cat "$__object/parameter/delimiter")"
# escape double quotes, as that is what we use ourself below
value_escaped="$(cat "$__object/parameter/value" | sed -e "s/\([\"]\)/\\\\\1/g")"
state_is="$(cat "$__object/explorer/state")"

[ "$state_is" = "$state_should" ] && exit 0

case "$state_should" in
    absent)
        # remove lines starting with key
        cat << DONE
tmpfile=\$(mktemp ${file}.cdist.XXXXXXXXXX)
# preserve ownership and permissions by copying existing file over tmpfile
cp -p "$file" "\$tmpfile"
sed '/^$key\($delimiter\+\)/d' "$file" > "\$tmpfile"
mv -f "\$tmpfile" "$file"
DONE
    ;;
    present)
        case "$state_is" in
            absent)
                # add new key and value
                printf 'echo "%s%s%s" >> "%s"' "$key" "$delimiter" "$value_escaped" "$file"
            ;;
            wrongvalue)
                # change exisiting value
                cat << DONE
tmpfile=\$(mktemp ${file}.cdist.XXXXXXXXXX)
# preserve ownership and permissions by copying existing file over tmpfile
cp -p "$file" "\$tmpfile"
sed "s|^$key\($delimiter\+\).*|$key\\1$value_escaped|" "$file" > "\$tmpfile"
mv -f "\$tmpfile" "$file"
DONE
            ;;
            *)
                echo "Unknown explorer state: $state_is" >&2
                exit 1
        esac
    ;;
    *)
       echo "Unknown state: $state_should" >&2
       exit 1
esac