address

#!/bin/bash

#######functions#################################################################

usage(){
    echo "	$0 [-s name] [-a] [-d name] [-l]"
    echo "	-s - find a record in the database by name"
    echo "	-a - add a record to the database"
    echo "	-d - remove the records containing the name given after -d"
    echo "	-l - list all the records in the database"
    exit
}

search(){
    RETURN_VALUE=1
    LINE_NUMBER=0
    for I in $(cat addresslib.txt | cut -d : -f 1 | tr ' ' '_'); do
	LINE_NUMBER=$(expr $LINE_NUMBER + 1)
	I=$(echo $I | tr '_' ' ')
	for J in $I; do
	    if [ $J = $1 ]; then
		display $LINE_NUMBER
		RETURN_VALUE=0
	    fi
	done
    done
    LINE_NUMBER=0
    for I in $(cat addresslib.txt | cut -d : -f 2 | tr ' ' '_'); do
	LINE_NUMBER=$(expr $LINE_NUMBER + 1)
	I=$(echo $I | tr '_' ' ')
	for J in $I; do
	    if [ $J = $1 ]; then
		display $LINE_NUMBER
		RETURN_VALUE=0
	    fi
	done
    done
    return $RETURN_VALUE
}

addEntry(){
    echo -n "First name: "
    read FNAME
    echo -n "Surname: "
    read SNAME
    echo -n "Address: "
    read ADDRESS
    echo -n "Email: "
    read EMAIL
    echo "$FNAME:$SNAME:$ADDRESS:$EMAIL" >> addresslib.txt
}

delete(){
    sed -i '/'${1}'/d' addresslib.txt
}

display(){
    RECORD=$(sed -n ${1}p addresslib.txt)
    echo "	Name: `echo $RECORD | cut -d : -f 1` `echo $RECORD | cut -d : -f 2`"
    echo "	Address: `echo $RECORD | cut -d : -f 3`"
    echo "	Email: `echo $RECORD | cut -d : -f 4`"
}

######main program#################################################################################

if [ ! -e addresslib.txt ]; then
    touch addresslib.txt
fi

while getopts 's:ad:lh?' opt
do
    case $opt in
	s)	search $OPTARG
		if [ $? -eq 1 ]; then
		    echo "Record not found"
		fi ;;
	a)	addEntry ;;
	d)	search $OPTARG
		if [ $? -eq 1 ]; then
		    echo "Record not found, nothing to delete"
		else
		    echo "Found the entries above. Are you sure you want to delete them? [y|n]"
		    read ANSWER
		    [ $ANSWER = y ] && delete $OPTARG
		fi ;;
	l)	LINE_NUMBER=0;
		for I in $(cat addresslib.txt | tr ' ' '_'); do
		    LINE_NUMBER=$(expr $LINE_NUMBER + 1)
		    display $LINE_NUMBER
		done ;;
	h|?)	usage ;;
    esac
done