# ------------------------------------------------------------------------------
# Configure locale
# This file is part of the init.sh project
# Copyright (c) 2019-2021 Geoffray Levasseur <fatalerrors@geoffray-levasseur.org>
# ------------------------------------------------------------------------------
# This file is distributed under 3-clause BSD license.
# The complete license agreement can be obtained at:
# https://opensource.org/licenses/BSD-3-Clause
# ------------------------------------------------------------------------------
# Variable:
#  * LOCALESET: List of locale that will be supported by system
#  * SYSLOCALE: Default system wide locale
#
# Both case will be formated in that way (with exemple for French:
#                           fr_FR.UTF-8
#                           ^   ^   ^
#                           |   |   |
#     ISO-631-1 language code   |   |
#  ISO 3166-2 country subdivision   |
#                                   Character table (ISO or UTF)
# ------------------------------------------------------------------------------

export VER_conf_locale="0.1.5"

conf_locale()
{
    pkginst locales locales-all
    local gen_fname=/etc/locale.gen
    backup_dist $gen_fname
    tag_file $gen_fname

    # Removing locales not in the list
    prnt I "Deactivating initial locales from installation..."
    if [[ $(grep -v '^#' $gen_fname | grep -v -e '^[[:space:]]*$') ]]; then
        grep -v '^#' $gen_fname | grep -v -e '^[[:space:]]*$' |
            while read -r line; do
                sed -i "s/$line/# $line/" $gen_fname
            done
    fi

    # Adding locales not yet enabled
    for loc in $LOCALESET; do
        prnt I "Activation de la locale ${loc}..."
        sed -i "/^# $loc /s/^# //" $gen_fname
    done
    unset loc
    unset gen_fname

    prnt I "Regenerating locales cache..."
    locale-gen

    prnt I "Defining system language..."
    [[ -z $SYSLOCALE ]] &&
        export SYSLOCALE=C

    local sys_fname=/etc/default/locale
    backup_dist $sys_fname
    tag_file $sys_fname
    echo "LANG=$SYSLOCALE" >> $sys_fname

    # We define all LC_* but LC_ALL as recommended by GNU
    for cfg in ADDRESS IDENTIFICATION MEASUREMENT MONETARY NAME NUMERIC PAPER \
            TELEPHONE TIME; do
        echo "LC_$cfg=$SYSLOCALE" >> $sys_fname
    done
}

precheck_conf_locale()
{
    if [[ -z $LOCALESET ]]; then
        prnt W "No locales definition!"
    else
        prnt m "Available locales will be: $LOCALESET"
    fi

    if [[ -z $SYSLOCALE ]]; then
        prnt W "No system locale defined, we will use C as default."
        export SYSLOCALE="C"
    fi
    prnt m "The default locale will be $SYSLOCALE"
}

export -f conf_locale
export -f precheck_conf_locale

# EOF