#!/bin/sh -e
#
# 2015 Dominique Roux (dominique.roux4 at gmail.com)
#
# 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/>.
#

#get params
section=$(cat "$__object/parameter/section")
key=$(cat "$__object/parameter/key")
value=$(cat "$__object/parameter/value")
file=$(cat "$__object/parameter/file" 2>/dev/null)
state=$(cat "$__object/parameter/state" 2>/dev/null)

#path variable default /etc/pacman.d
sec_path="/etc/pacman.d"

#allowed keys (from man pacman.conf)
allowed_option_keys="RootDir DBPath CacheDir GPGDir LogFile HoldPkg IgnorePkg IgnoreGroup Include Architecture XferCommand NoUpgrade NoExtract CleanMethod SigLevel LocalFileSigLevel RemoteFileSigLevel"
boolean_option_keys="UseSyslog Color UseDelta TotalDownload CheckSpace VerbosePkgLists"
allowed_repo_keys="Include Server SigLevel Usage"

#set global variables
MATCH=0

#function for check if array contain string
contains_element() {

    MATCH=0

    target=$1
    shift

    for key in "$@"; do
        if [ "${key}" = "${target}" ]; then
            MATCH=1
            return 0
        fi  
    done
    MATCH=0
}

if [ "${file}" ]; then
    __file "${sec_path}/plain_file_${file}"\
        --state exists --mode 666

    if [ "${state}" = "present" ]; then

        require="__file/${sec_path}/plain_file_${file}" __key_value "${file}_${key}" \
            --file "${sec_path}/plain_file_${file}" --key "${key}" --value "${value}" --delimiter ' = '

        exit 0

    elif [ "${state}" = "absent" ]; then
        require="__file/${sec_path}/plain_file_${file}" __key_value "${file}_${key}" \
                --state absent
        exit 0

    else
        echo "ERROR: Unknown state: ${state}" >&2
        exit 0
    fi
fi  

if [ "${section}" = "options" ]; then

    __file "${sec_path}/${section}"\
            --state exists --mode 666 --source - << eof
[${section}]
eof
    #check if key is valid
    #check for boolean value
    contains_element "${key}" "${boolean_option_keys}"

    if [ "${MATCH}" -eq 1 ]; then
        if [ "${value}" = "on" ]; then
            require="__file/${sec_path}/${section}" __line "${key}_${value}" \
                --file "${sec_path}/${section}" --line "${key}"
        elif [ "${value}" = "off" ]; then
            require="__file/${sec_path}/${section}" __line "${key}_${value}" \
                --file "${sec_path}/${section}" --line "${key}" --state absent
        fi
        
    else
        contains_element "${key}" "${allowed_option_keys}"

        if [ "${MATCH}" -eq 1 ]; then
            require="__file/${sec_path}/${section}" __key_value "${section}_${key}" \
                    --file "${sec_path}/${section}" --key "${key}" --value "${value}" --delimiter ' = '
        else
            echo "Key: ${key} is not valid. Have a look at man pacman.conf" >&2
        fi
    fi

else 
        __file "${sec_path}/repo_${section}"\
            --state exists --mode 666 --source - << eof
[${section}]
eof
    if [ "${state}" = "present" ]; then

        #check if key is valid
        contains_element "${key}" "${allowed_repo_keys}"
        if [ ${MATCH} -eq 0 ]; then
            exit
        fi
    
        require="__file/${sec_path}/repo_${section}" __key_value "${section}_${key}" \
                --file "${sec_path}/repo_${section}" --key "${key}" --value "${value}" --delimiter ' = '

    elif [ "${state}" = "absent" ]; then

        require="__file/${sec_path}/repo_${section}" __key_value "${section}_${key}" \
            --state absent

    else
        echo "ERROR: Unknown state: ${state}" >&2
    fi

fi