Shell Programming and Scripting

#!/bin/bash
#
#################################
#
# Script to remove Postgres
#
#################################

#function
prompt_ynq () {
   echo -e "\e[01;31m${1}\e[00m"
   PS3="Maak je keuze ('s' voor stop): "
   INSTALL=false
   select ANSWER in "ja" "nee"; do
        case ${ANSWER} in
         *    ) INSTALL=${ANSWER};  break;;
      esac
   done
   check_stop ${INSTALL}
}

#function
check_stop () {
   if [ -z ${1} ]
   then
      echo -e "\n\e[01;31mYou've chosed to quit.\e[00m\n"
      exit
   fi
}

echo -e "\e[01;31mSearching for Postgres\e[00m"
sleep 3
echo ""

if [ -f postgres* ] && [ -f postgresql* ]
        then
        echo -e "\e[01;31mFound versions of Postgres:\e[00m"
        dpkg -l | grep postgres
        echo ""
        prompt_ynq "Do you want to remove this versions of Postgres?"

        if [ ${ANSWER} = "ja" ]
                then
                sudo apt-get --purge remove postgresql-* postgresql-client-* postgresql-client-common-* postgresql-common-* postgresql-contrib-*
                sudo rm -rf /var/lib/postgresql/
                sudo rm -rf /var/log/postgresql/
                sudo rm -rf /etc/postgresql/

        else
        echo ""
        echo -e "\e[01;31mYou've chosen to remove Postgres\e[00m"
        echo ""
        fi

        else
        echo "No Postgres found"
fi

prompt_ynq () {
   echo -e "\e[01;31m${1}\e[00m"
   PS3="Maak je keuze ('s' voor stop): "
   INSTALL=false
   select ANSWER in "ja" "nee"; do
         case ${ANSWER} in
         *    )         INSTALL=${ANSWER};  break;;
         esac
   done
   check_stop ${INSTALL} }

    read -p "$BORDER_LEFT $1 (y/n)" -n1 answer 
    printf "\r"
    tui-echo "$1 (y/n)" "$answer"
    case $answer in
        y|o|j|s|Y|O|J|S)
            # First letter of the meaning "yes" in these languages:
            # English, Français, Deutsch, Italiano
            exit 0    ;;
        *)  exit 1    ;;
    esac

if tui-bol-yesno "Question to answer"
then echo "yep"
else echo "nope"
fi