#!/bin/bash

VERSION=1.1
APPNAME=poconvert #$(basename $0)
export TEXTDOMAIN=poconvert
export OUTPUT_CHARSET=UTF-8

LOGFILE=/tmp/$APPNAME/$APPNAME.log
CREDIT="$APPNAME version $VERSION"
TTY=""
tty | grep -q '^/dev/' && TTY="y"
usage() {
  if [ "$TTY" ] ; then
	echo "$CREDIT"
    gettext "convert po, mo files
  usage: poconvert SOURCE_FILE
  SOURCE_FILE can be a shell script, pot, po, or mo file."
   echo
  else splash "$CREDIT
$(gettext "Drop a file on the icon to convert po, mo.")"
  fi
}

TIMECOUNT=8
SPLASH=$(which yaf-splash)
splash() {
  [ "$DISPLAY" ] || return
  [ "$SPLASH" ] || return
  [ "$TIMEOUT" ] || TIMEOUT=4
  OPT=""
  while [ $# -gt 0 ]; do
    case "$1" in
    -*) OPT="$OPT $1"; shift; OPT="$OPT $1"; shift ;;
    *) break;;
    esac
  done
  [ "$XPID" ] && kill $XPID && XPID=""
  $SPLASH -timeout $TIMECOUNT $OPT -text "$@"
}
error() {
  MSG="$APPNAME: ERROR
 $@"
  if [ "$TTY" ]; then
    echo "$MSG"
  else
    splash -bg pink "$MSG"
  fi
}
fatal() {
 error "$@"
 exit 1
}
good() {
	MSG="$APPNAME: $@"
	if [ "$TTY" ]; then
    echo "$MSG"
  else
    splash -bg green "$MSG"
  fi
}
finish() {
  [ "$NEW" ] && OPERATION=$(gettext "'%s' is created.") || OPERATION=$(gettext "'%s' is updated.") 
  if [ $STATUS -eq 0 ] && [ -s "$TARGET" ]; then
    good "$(printf "$OPERATION" "$TARGET") $@"
    exit 0
  fi
  if [ -s "$LOGFILE" ]; then
    FAILED=$(gettext "Making '%s' failed.")
    fatal "$(printf "$FAILED" "$TARGET") $@
 $(cat $LOGFILE)"
  fi
  fatal "$@"
}

#dependency check
STATUS="y"
for P in msgfmt msgmerge msgunfmt xgettext; do
  [ -z "$(which $P)" ] && STATUS="" && break
done
if [ -z "$STATUS" ]; then
  usage
  fatal $(gettext "Some dependencies lacking. You need devx or poedit.")
fi

#source file
SRCFILE=$1
if [ -z "$SRCFILE" ]; then
  usage
  error $(gettext "No files specified.")
  exit 0
fi
NOTFOUND=$(gettext "'%s' not found.")
[ -f "$SRCFILE" ] || fatal $(printf "$NOTFOUND" "$SRCFILE")
  
# split source file name
DIR=$(dirname "$SRCFILE")
[ "$DIR" = '.' ] && DIR=$(pwd)
BASE=$(basename "$SRCFILE")
EXT=""
echo $BASE | grep -q '\.' && EXT=${BASE##*.}
[ "$EXT" ] && BASE=${BASE%%.$EXT}
#good "$DIR:$BASE:$EXT"

mkdir -p $(dirname $LOGFILE)
rm -f $LOGFILE
STATUS=0
NEW="y"
case "$EXT" in
pot) #make po
  TARGET=$DIR/$BASE.po
  if [ -s "$TARGET" ]; then
    NEW=""
    msgmerge --update "$TARGET" "$SRCFILE"  2>&1 > $LOGFILE
    STATUS=$?
    finish
  fi
  cp -f "$SRCFILE" "$TARGET"
  finish
  ;;
po) #make mo
  TARGET=$DIR/$BASE.mo
  [ -f "$TARGET" ] && NEW=""
  msgfmt -v -o "$TARGET" "$SRCFILE" 2>&1 > $LOGFILE
  STATUS=$?
  finish
  ;;
mo) # make po
  TARGET=$DIR/$BASE.po
  if [ -f "$TARGET" ] ;then
    NEW=""
    TARGET=$DIR/$BASE.po
    rm -f "$TARGET.bak"
    mv "$TARGET" "$TARGET.bak"
  fi
  msgunfmt -v -o "$TARGET" "$SRCFILE" 2>&1 > $LOGFILE
  STATUS=$?
  finish
  ;;
 *)
 NG=$(gettext "'%s' is not gettexted shell script.")
 # shell script?
 file "$SRCFILE" | grep -qw 'text' || fatal $(printf "$NG" "$SRCFILE")
 WORDS=$(grep '^[^#]*TEXTDOMAIN=' "$SRCFILE" | tail -n1| cut -s -d'=' -f2 | cut -d'#' -f1)
 for W in $WORDS; do DOMAIN=$W; break; done	# extract the first word
 [ "$DOMAIN" ] ||  fatal $(printf "$NG" "$SRCFILE")
 TARGET=$DIR/$DOMAIN.pot
 [ -f "$TARGET" ] && NEW=""
 ( cd "$DIR"
   xgettext --language=shell --from-code=utf8 --keyword=xmsg  --keyword=xecho --package-name=$BASE "$SRCFILE"  -o -  >"$TARGET" 2>$LOGFILE
  )
  STATUS=$?
  finish
  ;;
esac

#good "Done."