makeTransaction

#!/bin/bash

source config

read -p "Enter the last four digits of your Account number: " accNo
accNo=ACC`printf %04d $accNo`
ACC_DIR=$(getent passwd $accNo | cut -d: -f6)
balanceFile=$ACC_DIR/Current_Balance.txt
Acc_Balance=`cat $balanceFile`

if [ -z $ACC_DIR ] || ! [ -d $ACC_DIR ] #The user must have permissions to read the directory
# Hence run the script as superUser
then
	echo "The user doesn't have an account in our bank"
	exit -2	#254
fi

# read -sp "Enter your PIN: " PIN
read -n1 -p "Credit(C) or Debit(D): " transaction ; echo
case $transaction in
 c | C)
	read -p "Enter amount: " amount
	Acc_Balance=$[ Acc_Balance + amount ]
	transSymbol="+"
;;
 d | D)
	read -p "Enter amount: " amount # To check D or C. I hardcoded twice
	if [ $Acc_Balance -lt $amount ]
	then
		echo "Balance not sufficient"
# Here I used Rs. (instead we can use money symbol from locale settings)
		echo Available balance is Rs. $Acc_Balance
		exit 200
	fi
	Acc_Balance=$[ Acc_Balance - amount ]
	transSymbol="-"
;;*) echo "Invalid Transaction"; exit 100;;
esac



DATE=`date +"%F %H:%M:%S"` # Note the time only if the transaction is successful. Hence, added at last
echo $Acc_Balance > $balanceFile
echo $accNo $transSymbol$amount $DATE >> $ACC_DIR/Transaction_History.txt
echo Transaction Successful
echo Available Balance: Rs. $Acc_Balance
#Model Transaction log
#ACC00022 +7636 2022-03-06 22:26:34