#!/bin/sh
# Filename:      grml-setlang
# Purpose:       set language system-wide on grml system
# Authors:       grml-team (grml.org), (c) Michael Prokop <mika@grml.org>
# Bug-Reports:   see http://grml.org/bugs/
# License:       This file is licensed under the GPL v2.
################################################################################

PN="$(basename "$0")"
DIALOG=dialog
LANGFUNC=/etc/grml/language-functions

# notice: Debian's locales.postinst has been modified to write
# locale variables into /etc/default/locale instead of
# /etc/environment; the latter file is a PAM configuration file,
# so modifying it was a policy violation.
CONFFILE=/etc/default/locale

# shellcheck disable=SC1091
{
. /etc/grml/script-functions
. /etc/grml/lsb-functions
}

check4root || exit 100

eindent # as we are running inside grml boot sequence as well make sure we integrate fine

# allow writing $CONFFILE non-interactive via "grml-setlang $LANGUAGE"
if [ -n "$1" ] ; then
   NONINTERACTIVE=1
else
   NONINTERACTIVE=''
fi

if ! [ -r "$LANGFUNC" ] ; then
   echo "$LANGFUNC could not be read. Make sure you have package grml-autoconfig installed." >&2
   exit 1
fi

setvalue(){
  [ -n "$2" ] || return 1
  # already present in conffile?
  if grep -q "^${1}" "$CONFFILE" ; then
     sed -i "s#^${1}.*#${1}${2}#"  $CONFFILE
  # is the new Debian style /etc/default/locale present?
  elif grep -q "^# ${1}$" "$CONFFILE" ; then
     # shellcheck disable=SC1117
     sed -i "s#^\# ${1}#${1}${2}#" $CONFFILE
  else
     echo "$1${2}" >> $CONFFILE
  fi
}

# grml-small does not provide any further locales
if grep -q small /etc/grml_version 2>/dev/null ; then
   if [ -z "$NONINTERACTIVE" ] ; then
      LANG=C $DIALOG --stdout --msgbox "Notice: grml-small does not provide a full language setup.

You have to make sure the appropriate packages are installed." 0 0
      exit 1
   else
      esyslog user.notice "$PN" 'grml-small does not provide a full language setup.'
   fi
fi

# shellcheck disable=SC1091
{
[ -r /etc/environment ]    && . /etc/environment
[ -r /etc/default/locale ] && . /etc/default/locale
}
[ -n "$LANGUAGE" ] && DEFAULT_LANGUAGE="$LANGUAGE"

if [ -z "$DEFAULT_LANGUAGE" ] ; then
   DEFAULT_LANGUAGE=en
fi

if [ -z "$NONINTERACTIVE" ] ; then
# shellcheck disable=SC1010
{
   LANGUAGE=$(LANG=C $DIALOG --stdout --title "$PN" --default-item $DEFAULT_LANGUAGE --radiolist \
"Which language do you want to use?

This will affect \$LANG, \$LANGUAGE and \$LC_MESSAGES.

Notice: if you want to adjust /etc/locale.gen (defines
which locales should be generated by locale-gen)
please run 'dpkg-reconfigure locales' manually.

Configuration will be written to $CONFFILE" 0 0 0 \
 at 'austria (unicode version)' off \
 at-iso 'austrian (iso version)' off \
 au 'austrial (unicode version)' off \
 au-iso 'australian (iso version)' off \
 be 'belgian (unicode version)' off \
 be-iso 'belgian (iso version)' off \
 bg 'bulgarian (unicode version)' off \
 bg-iso 'bulgarian (iso version)' off \
 br 'brazilian (unicode version)' off \
 br-iso 'brazilian (iso version)' off \
 ch 'swiss (unicode version)' off \
 ch-iso 'swiss (iso version)' off \
 cf 'french canadian' off \
 cn 'chinese (unicode version)' off \
 cn-iso 'chinese (iso version)' off \
 cs 'czech (unicode version)' off \
 cs-iso 'czech (iso version)' off \
 cz 'czech (unicode version)' off \
 cz-iso 'czech (iso version)' off \
 de 'german (unicode version)' off \
 de-iso 'german (iso version)' off \
 dk 'dansk (unicode version)' off \
 dk-iso 'dansk (iso version)' off \
 da 'dansk (unicode version)' off \
 da-iso 'dansk (iso version)' off \
 el 'greek (unicode version)' off \
 el-iso 'greek (iso version)' off \
 en 'english [us] (unicode version, grml default)' on \
 en-iso 'english [us] (iso version)' off \
 es 'spanish (unicode version)' off \
 es-iso 'spanish (iso version)' off \
 fi 'finnish (unicode version)' off \
 fi-iso 'finnish (iso version)' off \
 fr 'frensh (unicode version)' off \
 fr-iso 'frensh (iso version)' off \
 ga 'irish gaeilge (unicode version)' off \
 ga-iso 'irish gaeilge (iso version)' off \
 he 'hebrew (unicode version)' off \
 he-iso 'hebrew (iso version)' off \
 il 'hebrew (unicode version)' off \
 il-iso 'hebrew (iso version)' off \
 ie 'irish (unicode version)' off \
 ie-iso 'irish (iso version)' off \
 it 'italian (unicode version)' off \
 it-iso 'italian (iso version)' off \
 ja 'japanese (unicode version)' off \
 ja-iso 'japanese (iso version)' off \
 nl 'dutch (unicode version)' off \
 nl-iso 'dutch (iso version)' off \
 pl 'polish (unicode version)' off \
 pl-iso 'polisch (iso version)' off \
 pt 'portuguese (unicode version)' off \
 pt-iso 'portuguese (iso version)' off \
 ru 'russian (unicode version)' off \
 ru-iso 'russian (iso version)' off \
 sk 'slovak (unicode version)' off \
 sk-iso 'slovak (iso version)' off \
 sl 'slovenian (unicode version)' off \
 sl-iso 'slovenian (iso version)' off \
 tr 'turkish (unicode version)' off \
 tr-iso 'turkish (iso version)' off \
 tw 'chinese (traditional) (unicode version)' off \
 tw-iso 'chinese (traditional) (iso version)' off \
 uk 'british (unicode version)' off \
 uk-iso 'british (iso version)' off \
 us 'american (unicode version)' off \
 us-iso 'american (iso version)' off \
)
}

  retval=$?
  case $retval in
      (0)   # everything ok
            ;;
      (1)   echo "Cancel pressed." ; exit 1 ;;
      (255) echo "ESC pressed."    ; exit 1 ;;
  esac

else # non-interactive
  LANGUAGE="$1"
fi

if ! grep -qe "${LANGUAGE})" -qe "${LANGUAGE}|" $LANGFUNC ; then
   ewarn "Language ${LANGUAGE} not supported, using default." ; eend 0
fi

# fallback to C if using an ISO system (which is latin1 for LC_CTYPE);
# this should prevent users from broken ctype settings if the set
# locale isn't available on a remote system
if echo "$LANGUAGE" | grep -q -- '-iso' ; then
   LC_CTYPE=C
fi

# read in the file where all the $LANGUAGE stuff is defined
# shellcheck disable=SC1090
. $LANGFUNC

# make sure the file exists
if ! [ -r $CONFFILE ] ; then
cat > $CONFFILE <<EOF
# File generated by $PN on $(date)
LANG=$LANG
# LC_CTYPE=$LC_CTYPE
# LANGUAGE=$LANGUAGE
# TZ=$TZ
# other environment variables you might want to set:
# LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY
# LC_MESSAGES LC_PAPER LC_NAME LC_ADDRESS
# LC_TELEPHONE LC_MEASUREMENT LC_IDENTIFICATION
#
# Note: set LC_ALL to overwrite all LC_* variables
#       LC_ALL > LC_* > LANG
#       LANGUAGE is glibc only and binds stronger than LC_ALL
EOF
fi

setvalue 'LANG='     "$LANG"

retval=$?
case $retval in
    (0)
          if [ -z "$NONINTERACTIVE" ] ; then
             LANG=C $DIALOG --stdout --msgbox "Writing language settings ($LANGUAGE) to $CONFFILE was successful." 0 0
          else
             einfo "Writing language settings ($LANGUAGE) to $CONFFILE was successful."
             esyslog user.notice "$PN" "Writing language settings ($LANGUAGE) to $CONFFILE was successful." ; eend 0
          fi
          ;;
    *)
          if [ -z "$NONINTERACTIVE" ] ; then
             LANG=C $DIALOG --stdout --msgbox "Error writing settings for $LANGUAGE to $CONFFILE." 0 0
          else
             eerror "Error writing settings for $LANGUAGE to $CONFFILE." ; eend 1
             esyslog user.notice "$PN" "Error writing settings for $LANGUAGE to $CONFFILE."
          fi
          ;;
esac

eoutdent

## END OF FILE #################################################################