#!/usr/bin/env bash
# ------------------------------------------------------------------------------
# Copyright (c) 2013-2026 Geoffray Levasseur <fatalerrors@geoffray-levasseur.org>
# Protected by the BSD3 license. Please read bellow for details.
#
# * Redistribution and use in source and binary forms,
# * with or without modification, are permitted provided
# * that the following conditions are met:
# *
# *   Redistributions of source code must retain the above
# *   copyright notice, this list of conditions and the
# *   following disclaimer.
# *
# *   Redistributions in binary form must reproduce the above
# *   copyright notice, this list of conditions and the following
# *   disclaimer in the documentation and/or other materials
# *   provided with the distribution.
# *
# *   Neither the name of the copyright holder nor the names
# *   of any other contributors may be used to endorse or
# *   promote products derived from this software without
# *   specific prior written permission.
# *
# * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
# * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
# * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# * OF SUCH DAMAGE.
# ------------------------------------------------------------------------------

locale_check()
{
    locale -a | grep -qx "$1" || {
        disp W "Locale '$1' is not installed on this system."
        return 1
    }
    return 0
}


# ------------------------------------------------------------------------------
# Change locale to the given one in parameter
# Usage: setlocale <locale>
setlocale()
{
    local PARSED
    PARSED=$(getopt -o h --long help -n 'setlocale' -- "$@")
    if [[ $? -ne 0 ]]; then
        disp E "Invalid options, use \"setlocale --help\" to display usage."
        return 1
    fi
    eval set -- "$PARSED"
    while true; do
        case "$1" in
            -h|--help)
                printf "setlocale: Configure system environment locale variables.\n\n"
                printf "Usage: setlocale <locale>\n\n"
                printf "Options:\n"
                printf "  -h, --help        Display this help screen\n"
                return 0
                ;;
            --)
                shift
                break
                ;;
            *)
                disp E "Invalid options, use \"setlocale --help\" to display usage."
                return 1
                ;;
        esac
    done

    local loc=$1
    [[ -z $loc ]] && disp E "No locale specified." && return 1

    locale_check "$loc" || return 1

    export LANG=$loc
    export LC_MESSAGES=$loc
    export LC_TIME=$loc
    export LC_NUMERIC=$loc
    export LC_MONETARY=$loc
    export LC_COLLATE=$loc
    export LC_CTYPE=$loc

    disp I "Locale set to $loc."
}
export -f setlocale
# ------------------------------------------------------------------------------


# ------------------------------------------------------------------------------
# Special case : change locale to C standard
# Usage: setc
setc()
{
    # Locale definitions
    export LC_ALL=C
    disp I "Locale changed to standard C (POSIX)."
}
export -f setc
# ------------------------------------------------------------------------------


# ------------------------------------------------------------------------------
# Change locale to French
# Usage: setfr
setfr()
{
    # Set fr locale definitions
    setlocale "fr_FR.UTF-8"
}
export -f setfr
# ------------------------------------------------------------------------------


# ------------------------------------------------------------------------------
# Change locale to US (needed by Steam)
# Usage: setus
setus()
{
    setlocale "en_US.UTF-8"
}
export -f setus
# ------------------------------------------------------------------------------


# ------------------------------------------------------------------------------
# EOF