bank_management_system

#!/bin/bash

# Function to display the main menu
menu() 
{
    echo "================================================================================"
    echo "                        Bank Management System                                  "
    echo "================================================================================"
    echo "Enter 1 to Create a new account."
    echo "Enter 2 to Deposit."
    echo "Enter 3 to Withdraw."
    echo "Enter 4 to View account."
    echo "Enter 5 to Check balance."
    echo "Enter 6 to Delete account."
    echo "Enter 7 to Exit."
}

# Function to create a new account
newaccount()
{
    # Checking if the info.csv file exists, if not, creating it
    if [ ! -f info.csv ]
    then
        touch info.csv
    fi

    # Getting account details from user
    echo "Enter account no: "
    read accno

    # Validating account number input
    while ! [[ $accno =~ [0-9]+$ ]]
    do
        echo "Please Enter a valid no:"
        read accno
    done

    # Getting user account information
    echo "Please Enter Full Name : "
    read name
    echo
    echo "Enter Date of Birth: (Year-Month-Day)"
    read bday
    echo
    echo "Enter Email Address: "
    read email
    echo
    echo "Enter CNIC/ID Number :"
    read id
    echo
    echo "Enter City Name : "
    read city
    echo 
    echo "Enter Phone Number : "
    read phone
    echo
    echo "Select Account Type:"
    echo "1. Saving"
    echo "2. Current"
    read accountType

    # Validating account type input
    case $accountType in
        1) accountType="saving" ;;	
        2) accountType="current" ;;
        *) 
            echo " Please Enter a valid option! "
            read accountType
    esac

    # Getting initial deposit amount from user
    echo "Enter How much money you want to deposit: "
    read amount

    # Validating deposit amount input
    while ! [[ $amount =~ [0-9]+$ ]]
    do
        echo "Please Enter a valid amount:"
        read amount
    done

    # Appending account details to info.csv file
    echo "$accno, $name, $bday, $id, $email, $city, $phone, $accountType, $amount" >> info.csv

    echo " The account has been created successfully"
}

# Function to view account details
viewaccount()
{
    echo "Enter 1 to View Specific Account Details"
    echo "Enter 2 to View all existing accounts."
    read input

    if [ "$input" == "1" ]
    then
        echo
        echo "Input the ID number of the account:"
        read id_num
        echo "Here is the Details of the Customer: $id_num "
        echo ""ID","Name","DOB","CNIC","Email","City","PhoneNo","AccountType","Amount""
        awk -F"," -v num=$id_num '$1 == num' info.csv

    elif [ "$input" == "2" ]
    then
        echo
        echo "Here is the data of all accounts"
        awk '{print}' | column -t info.csv	
    else
        echo "false"
    fi
}

# Function to delete an account
deleteaccount()
{
    echo "Please Enter ID Of account to Delete"
    read id_num 
    
    # Removing account with given ID from info.csv
    awk -F"," -v num=$id_num '$1 != num' info.csv > delfile.csv
    cp delfile.csv info.csv
    echo "You have successfully deleted the account $id_num"	
}

# Function to deposit money into an account
deposit()
{
    echo "Enter ID Number"
    read id_num

    echo "Enter Amount You want to deposit"
    read amount

    # Validating deposit amount input
    while ! [[ $amount =~ [0-9]+$ ]]
    do
        echo "Please Enter a valid amount:"
        read amount
    done
    
    # Retrieving account details
    acno=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $1}')
    namee=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $2}')
    dob=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $3}')
    cnic=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $4}')
    mail=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $5}')
    cty=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $6}')
    phne=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $7}')
    acctype=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $8}')
    currentBalance=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $9}')

    # Displaing current balance and calculating new balance after deposit
    echo "Current balance: $currentBalance"
    newBalance=$(( currentBalance + amount ))
    echo "New Balance: $newBalance"
    
    # Removing account from info.csv file
    awk -F"," -v num=$id_num '$1 != num' info.csv > delfile.csv
    cp delfile.csv info.csv

    # Appending updated account details to info.csv file
    echo "$acno, $namee, $dob, $cnic, $mail, $cty, $phne, $acctype, $newBalance" >> info.csv
}

# Function to withdraw money from an account
withdraw()
{
    echo "Enter ID Number"
    read id_num

    echo "Enter Amount You want to withdraw"
    read amount

    # Validating withdrawal amount input
    while ! [[ $amount =~ [0-9]+$ ]]
    do
        echo "Please Enter a valid amount:"
        read amount
    done
    
    # Retrieving account details
    acno=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $1}')
    namee=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $2}')
    dob=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $3}')
    cnic=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $4}')
    mail=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $5}')
    cty=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $6}')
    phne=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $7}')
    acctype=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $8}')
    currentBalance=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $9}')

    echo "Old balance: $currentBalance"
    
    # Checking if withdrawal amount exceeds current balance
    if [ $amount -le $currentBalance ]
    then		
        newBalance=$(( currentBalance - amount ))
        echo "New Balance: $newBalance"
    
        # Removing account from info.csv file
        awk -F"," -v num=$id_num '$1 != num' info.csv > delfile.csv
        cp delfile.csv info.csv

        # Appending updated account details to info.csv
        echo "$acno, $namee, $dob, $cnic, $mail, $cty, $phne, $acctype, $newBalance" >> info.csv

    else
        echo "insufficient funds."
    fi
}

# Function to check balance of an account
checkbalance()
{
    echo "Please Enter ID Of account to check balance:"
    read id_num 
    
    # Retrieving current balance from info.csv file and displaying it
    currentBalance=$(awk -F"," -v num=$id_num '$1 == num' info.csv | awk -F"," '{print $9}')
    echo "Current balance: $currentBalance"	
}

# Main loop to display menu and execute selected operations
while [ "$option" != "7" ]
do
    menu
    echo "Enter option: "
    read option 
    case $option in
        1) newaccount
            read temp		
            clear;;

        2) deposit
            read temp
            clear;;

        3) withdraw
            read temp
            clear;;

        4) viewaccount
            read temp
            clear;;

        5) checkbalance
            read temp
            clear;;

        6) deleteaccount
            read temp
            clear;;

        7) exit;;

        *)
            echo "Select a Valid Option"
            read temp
            clear;;
            
    esac
done