#!/bin/sh -e
#
# 2011-2013 Nico Schottelius (nico-cdist at schottelius.org)
# 2013-2022 Steven Armstrong (steven-cdist 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/>.
#

destination="/$__object_id"
state_should="$(cat "$__object/parameter/state")"
type="$(cat "$__object/explorer/type")"
stat_file="$__object/explorer/stat"
fire_onchange=''

get_current_value() {
    if [ -s "$stat_file" ]; then
        _name="$1"
        _value="$2"
        case "$_value" in
            [0-9]*)
                _index=2
            ;;
            *)
                _index=3
            ;;
        esac
        awk '/'"$_name"':/ { print $'$_index' }' "$stat_file"
        unset _name _value _index
    fi
}

set_group() {
    echo "chgrp '$1' '$destination'"
    echo "chgrp '$1'" >> "$__messages_out"
    fire_onchange=1
}

set_owner() {
    echo "chown '$1' '$destination'"
    echo "chown '$1'" >> "$__messages_out"
    fire_onchange=1
}

set_mode() {
    echo "chmod '$1' '$destination'"
    echo "chmod '$1'" >> "$__messages_out"
    fire_onchange=1
}

case "$state_should" in
    present|exists)
        if [ -f "$__object/files/upload-destination" ]; then
            final_destination="$destination"
            # We change the 'global' $destination variable here so we can
            # change attributes of the new/uploaded file before moving it
            # to it's final destination.
            destination="$(cat "$__object/files/upload-destination")"
        fi
        # Note: Mode - needs to happen last as a chown/chgrp can alter mode by
        #  clearing S_ISUID and S_ISGID bits (see chown(2))
        for attribute in group owner mode; do
            if [ -f "$__object/parameter/$attribute" ]; then
                value_should="$(cat "$__object/parameter/$attribute")"

                # format mode in four digits => same as stat returns
                if [ "$attribute" = mode ]; then
                    # Convert to four-digit octal number (printf interprets
                    # strings with leading 0s as octal!)
                    value_should=$(printf '%04o' "0${value_should}")
                fi

                value_is="$(get_current_value "$attribute" "$value_should")"
                if [ -f "$__object/files/set-attributes" ] || [ "$value_should" != "$value_is" ]; then
                    "set_$attribute" "$value_should"
                fi
            fi
        done
        if [ -f "$__object/files/upload-destination" ]; then
            # move uploaded file into place
            printf 'rm -rf "%s"\n' "$final_destination"
            printf 'mv "%s" "%s"\n' "$destination" "$final_destination"
        fi
        if [ -f "$__object/files/set-attributes" ]; then
            # set-attributes is created if file is created or uploaded in gencode-local
            fire_onchange=1
        fi
    ;;

    absent)
        if [ "$type" = "file" ]; then
            echo "rm -f '$destination'"
            echo remove >> "$__messages_out"
            fire_onchange=1
        fi
    ;;

    pre-exists)
        :
        ;;

    *)
        echo "Unknown state: $state_should" >&2
        exit 1
    ;;
esac

if [ -f "$__object/parameter/onchange" ]; then
    if [ -n "$fire_onchange" ]; then
        cat "$__object/parameter/onchange"
    fi
fi
