#!/bin/bash

PROG_PATH='/usr/bin/joe'
REWRITE_FILE='1'
CHARSET_TO='utf8'

usage(){
	echo "usage: $PROG_ALIAS koi8|win <filename>"
	exit 0
}

if [ "$1" != "" ] && [ "$2" != "" ]; then

	#-------------------- detect charset
	CHARSET_FROM=''
	case $1 in
	'koi8') CHARSET_FROM='koi8-r'
	;;
	'win') CHARSET_FROM='cp1251'
	;;
	*) usage
	;;
	esac

	#-------------------- define directoty
	TMP_DIRECTORY='/tmp/translate/';
	if [ ! -d $TMP_DIRECTORY ]; then
		echo "!!!! No such directory $TMP_DIRECTORY"
		if [ ! -d /tmp/ ]; then
			echo "!!!! No such directory /tmp/"
			if [ /bin/mkdir -m 0777 /tmp/ ]; then
				echo "!!!! Create directory /tmp/"
			else
				echo "!!!! Not created /tmp/ : Permission denied"
				exit 0
			fi
		fi
		if /bin/mkdir -m 0777 $TMP_DIRECTORY ; then
			echo "!!!! Create directory $TMP_DIRECTORY"
		else
			echo "!!!! Not created $TMP_DIRECTORY : Permission denied"
			exit 0
		fi
	fi

	#-------------------- define filename
	FILE_ORIG=$2
	if ! echo $FILE_ORIG | grep '^\/' > /dev/null 2>&1 ; then
		PUTH_PWD=`pwd`
		FILE_ORIG=`echo $PUTH_PWD/$FILE_ORIG`
	fi
	FILE_TMP=`echo "$FILE_ORIG" | sed -e 's/\//\.\./g'`
	FILE_TMP=`echo $TMP_DIRECTORY$FILE_TMP`
	
	#-------------------- define user && group
	USER=`ls -l $FILE_ORIG | sed -e 's/^[^ ]* [^ ]* //' -e 's/ .*//'`
	GROUP=`ls -l $FILE_ORIG | sed -e 's/^[^ ]* [^ ]* [^ ]* //' -e 's/ .*//'`

	#-------------------- create copy origcharset
	if /bin/cp $FILE_ORIG $FILE_TMP.origcharset ; then
		/bin/chmod 0666 $FILE_TMP.origcharset
		echo "!!!! create file $FILE_TMP.origcharset"
	else
		echo "!!!! Error create file $FILE_TMP.origcharset"
		exit 0
	fi
	
	#-------------------- change charset
	if /usr/bin/iconv -f $CHARSET_FROM -t $CHARSET_TO -o $FILE_TMP $FILE_ORIG ; then
		/bin/chmod 0666 $FILE_TMP
		echo "!!!! change charset from $CHARSET_FROM in $CHARSET_TO"
	else
		echo "!!!! Error change charset in file $FILE_ORIG"
		exit 0
	fi
	
	#-------------------- run program view/edit
	echo "!!!! start $PROG_PATH $FILE_TMP"
	$PROG_PATH $FILE_TMP
	
	#-------------------- rewrite file
	if [ $REWRITE_FILE != 0 ]; then 
		#-------------------- back change charset
		if /usr/bin/iconv -t $CHARSET_FROM -f $CHARSET_TO -o $FILE_ORIG $FILE_TMP ; then
			echo "!!!! change charset from $CHARSET_TO in $CHARSET_FROM"
		else
			echo "!!!! Error change charset in file $FILE_ORIG"
			echo "!!!! Save BAK file $FILE_TMP"
			exit 0
		fi
		#-------------------- restore user && group
		/bin/chown $USER:$GROUP $FILE_ORIG
	fi
else
	$PROG_PATH $1 $2
fi