Hi,

I'm dealing with a small problem here that I can't seem to overcome by myself. Any help would be greatly appreciated

Basically, I have three variables, EXTSUB1, EXTSUB2 and EXTSUB3. These variables carry a file the user provides. What I need is to check each of the variables and if the specific variables carries a file with a specific extension, then reset that variable. I currently have the following but would like to reduce this code, maybe even do it in one go for all three variables...

# Check file extensions and if they match the
# defined ones, reset the specific variable

case "${EXTSUB1##*.}" in
            ass|ASS|idx|IDX|sub|SUB|sup|SUP|ssa|SSA)
             echo
             echo "-> Subtitle format '${EXTSUB1##*.}' not supported!"
             echo "-> Skipping import..."
             EXTSUB1=
             ;;
esac
case "${EXTSUB2##*.}" in
             ass|ASS|idx|IDX|sub|SUB|sup|SUP|ssa|SSA)
             echo
             echo "-> Subtitle format '${EXTSUB2##*.}' not supported!"
             echo "-> Skipping import..."
             EXTSUB2=
             ;;
esac
case "${EXTSUB3##*.}" in
               ass|ASS|idx|IDX|sub|SUB|sup|SUP|ssa|SSA)
               echo
               echo "-> Subtitle format '${EXTSUB3##*.}' not supported!"
               echo "-> Skipping import..."
               EXTSUB3=
               ;;
esac

            for i in {1..3}; do
			if [ ! -z "${EXTSUB[$i]}" ]; then
				case "${EXTSUB[$i]##*.}" in
					idx|IDX|sub|SUB|sup|SUP|ass|ASS|SSA|SSA|ttxt|TTXT)
					echo
					echo "-> Subtitle format '$(echo ${EXTSUB[$i]##*.} | tr '[:lower:]' '[:upper:]')' not supported by OGM!"
					echo "-> Skipping import of '${EXTSUB[$i]}'"
					EXTSUB[$i]=
					;;
				esac
			fi
		done