#!/bin/sh
#   The above line causes this script to be run using the Bourne Shell (sh)
#######################################################################
#
#   Script to maintain a contacts database.
#
#######################################################################

#
#   Define the name of the file
#
fname=names.dat

#
#   If the file does not exist, create it
#
[ ! -f $fname ] && > $fname

#
#   Display the menu
#
clear
echo "\n\t\tSHELL PROGRAMMING DATABASE"
echo "\t\t\tMAIN MENU"
echo "\nWhat do you wish to do?\n"
echo "\t1.  Create records"
echo "\t2.  View records"
echo "\t3.  Search for records"
echo "\t4.  Delete records that match a pattern"
echo

#
#   Prompt for an answer
#
echo "Answer? \c"
read ans junk

#
#   Decide what to do
#
case "$ans" in
    1)
        #
        #   Read in the contact details from the keyboard
        #
        echo "Please enter the following contact details:"
        echo
        echo "Given name: \c"
        read name
        echo "   Surname: \c"
        read surname
        echo "   Address: \c"
        read address
        echo "      City: \c"
        read city
        echo "     State: \c"
        read state
        echo "       Zip: \c"
        read zip

        #
        #   Write the details to the text file
        #
        echo $name:$surname:$address:$city:$state:$zip >> $fname
        ;;
    2)
        #
        #   Show what's currently in the file
        #
        (
            echo
            echo Here are the current contacts in the database:
            echo
            cat $fname
        ) | more

        #
        #  And display how many there are
        #
        echo
        echo There are `cat $fname | wc -l` contacts in the database
        ;;
    3)
        echo The Search case is not implemented yet
        ;;
    4)
        echo The Delete case is not implemented yet
        ;;
    *)
        echo "That was an invalid choice"
        ;;
esac
