ATM

# By: Michael Sheinman
# Date: 2018-03-28 13:31:37.934330
# File Name: ATM project
# Description: Making a bank project
import sys
import os
import time
import re
from datetime import datetime
from decimal import Decimal


# Function to change the user file. Complete
def replaceFile(account, file):
    os.remove(account + '.txt')
    userFile = open(account + '.txt', 'w')
    # Rewrite here
    for line in range(len(file)):
        userFile.write(str(file[line]) + '\n')
    userFile.close()
    return file


# Recursion to make sure the pin numbers are the same
def equal(p):
    # If there is only one number left, we know all were equal
    if len(p) == 1:
        return True
    else:
        if p[0] == p[1]:
            # If they are equal, we have to check the next ones
            return equal(p[1:])
        else:
            return False

# Handles special cases such as 20 & 8 transactions
def is_special(account, file):
    myFile = open(account + 'history.txt')
    allTransactions = myFile.readlines()
    if len(allTransactions) % 8 == 0:
        now = datetime.now()
        current_time = "%s:%s %s / %s / %s" % (
        now.hour, now.minute, now.month, now.day, now.year)
        history_file = open(account + 'history.txt', 'a')
        history_file.write(current_time + '\n')
        history_file.write(str(-4.00) + '\n')
        if Decimal(file[4]) >= 4:
            file.pop(4)
            file.insert(4, str(Decimal(file[4]) -4))
        elif 0 < Decimal(file[4]) < 4:
            difference = 4 - Decimal(file[4])
            file.pop(4)
            file.pop(4)
            file.insert(4, str(0))
            file.insert(5, str(Decimal(file[5]) -difference))
            file = overdraftfunction(difference, file[2], current_time, file)
        else:
            to_be_used = file[5]
            file.pop(5)
            file.insert(5, Decimal(to_be_used) - 4)
    elif len(allTransactions) % 40 == 0:
        history_file = open(account + 'history.txt', 'r')
        myhistory = history_file.readlines()
        total = 0
        print("You have reached 20 transactions. Here they are:")
        for a in range(len(myhistory)):
            if not a % 2 == 0:
                total += Decimal(myhistory[a].split('\n')[0])
            sys.stdout.write(myhistory[a])
        if total > 0:
            print("\nYour net income is: %s" % total)
        else:
            print("\nYour net lose is: %s" % total)

    pass

# Account details.
def view(file):
    print(file)
    print("Account details:")
    print("_______________________")
    print("Card number: %s" % file[0])
    print("Balance: %s" % file[4])
    print("Overdraft: %s" % file[5])
    time.sleep(2)


# Printing transaction history
def print_transaction(account):
    transactions = open(account + 'history.txt', 'r')
    allTransactions = transactions.readlines()
    transactions.close()
    if len(allTransactions) == 0:
        print("No transactions yet")
    else:
        print("Transactions:")
        for tran in range(len(allTransactions)):
            sys.stdout.write(allTransactions[tran])


# Replacing the pin
def pin(current, account, file):
    while True:
        pin = input("Enter the new pin(must be 4 digits): ")
        if not re.search(r'^\d{4}$', pin):
            continue
        if equal(pin):
            continue
        if pin == current:
            continue
        if pins_check(pin):
            break
        else:
            print("This pin already exists")
    file.pop(1)
    file.insert(1, str(pin))
    print("Changing pin...")
    time.sleep(2)
    return replaceFile(account, file)


def withdraw(money, overdraft, file, account, gone_overdraft):
    if overdraft == 'True':
        gone_overdraft = Decimal(gone_overdraft)
    allOptions = {'1': 20, '2': 40, '3': 60, '4': 80, '5': 100, '6': 120, '7': 'other'}
    while True:
        option = input("Pick a withdraw option: 1) $20 2) $40 3) $60 4) $80 5) $100 6) $120 7) Other: ")
        if option not in allOptions.keys():
            continue
        break
    withdrawen = allOptions[option]
    if withdrawen == 'other':
        while True:
            withdrawen = input("Enter an amount: ")
            try:
                if Decimal(withdrawen) > 0:
                    break
            except Exception:
                continue
    withdrawen = Decimal(withdrawen)
    if money > withdrawen or overdraft == 'True' and money + gone_overdraft > withdrawen:
        sys.stdout.write("dispensing money")
        name = ".....\n"
        for char in name:
            sys.stdout.write(char)
            sys.stdout.flush()
            time.sleep(.5)
        if money > withdrawen:
            file.pop(4)
            file.insert(4, str(money - withdrawen))
        else:
            difference = withdrawen - money
            gone_overdraft -= difference
            now = datetime.now()
            current_time = "%s:%s %s / %s / %s" % (
            now.hour, now.minute, now.month, now.day, now.year)
            file =  overdraftfunction(gone_overdraft, file[2], current_time, file)
            money = 0
            file.pop(4)
            file.pop(4)
            file.insert(4, money)
            file.insert(5, gone_overdraft)

        # Rewrite file point
        now = datetime.now()
        current_time = "%s:%s %s / %s / %s\n" % (now.hour, now.minute, now.month, now.day, now.year)
        history_file = open(account + 'history.txt', 'a')
        history_file.write(current_time + '\n')
        history_file.write(str(-withdrawen) + '\n')
        history_file.close()
        is_special(account, file)
        return replaceFile(account, file)
    else:
        print("No enough money")
        return file


def deposit(file, userMoney, account):
    allDeposits = []
    while True:
        while True:
            money = input("Enter money to Deposit(done to quit): ".lower())
            try:
                if Decimal(money) < 0:
                    continue
                break
            except Exception:
                # Value error means a string was entered
                if money == "done":
                    break
                else:
                    continue

        if money != 'done':
            allDeposits.append(money)
            time.sleep(2)
            print("Deposit accepted")
        else:
            break
    total = 0
    for i in range(len(allDeposits)):
        total += Decimal(allDeposits[i])
    if file[3] == 'True' and Decimal(file[5]) < 500:
        if total + Decimal(file[5]) <= 500:
            newOverDraft = Decimal(file[5]) + total
        else:
            subtract = total - Decimal(file[5])
            newOverDraft = 500
            another_varaible_to_store_total = total - subtract
            userMoney += another_varaible_to_store_total
    else:
        userMoney += total
        if file[3] == 'True':
            newOverDraft = 500
        else:
            newOverDraft = "Not in action"
    file.pop(4)
    file.insert(4, str(userMoney))
    file.pop(5)
    file.insert(5, str(newOverDraft))
    now = datetime.now()
    current_time = "%s:%s %s / %s / %s\n" % (now.hour, now.minute, now.month, now.day, now.year)
    history_file = open(account + 'history.txt', 'a')
    history_file.write(current_time)
    history_file.write(str(total) + '\n')
    history_file.close()
    is_special(account, file)
    return replaceFile(account, file)


# Function that will notify the user when they go beyond overdraft
def overdraftfunction(howfar, email, time, file):
    import smtplib
    from email.mime.multipart import MIMEMultipart
    from email.mime.text import MIMEText

    # variables for to and from
    the_overdraft = str(Decimal(file[5]) - Decimal(howfar))
    charge = str(Decimal(the_overdraft) * Decimal(0.25))
    howfar -= Decimal(charge)
    myadd = "[email protected]"
    youradd = email

    msg = MIMEMultipart()
    msg['From'] = myadd
    msg['To'] = youradd
    msg['Subject'] = "ATM project"

    # body of text
    body = "Dir Sir/Madam, Your recent transaction at (%s) shows that you have gone into your overdraft.  " \
           "You overdraft protection is $%s.  " \
           "You have gone $%s into your overdraft, leaving you with a balance of $%s in your overdraft. " \
           "This is including a small service charge of $%s (25 percent of $%s) has been added to your account. Thank you." % \
           (time, file[5], the_overdraft, howfar, charge, the_overdraft)
    msg.attach(MIMEText(body, "plain"))

    server = smtplib.SMTP("smtp.gmail.com", 587)
    server.starttls()
    server.login(myadd, 'mikejack')
    text = msg.as_string()
    server.sendmail(myadd, youradd, text)
    server.quit()
    to_be_used = file[5]
    file.pop(5)
    file.insert(5, str(Decimal(to_be_used) - Decimal(charge)))
    return replaceFile(file[0], file)


# Function that lets the user pay bills
def bills(file, userMoney, account, overdraft, email, overdraftAmount):
    if overdraft == 'True':
        overdraftAmount = Decimal(overdraftAmount)
    billName = input("Enter bill name: ")
    while True:
        accountNumber = input("Enter account number(must be 6 digits): ")
        if re.search(r'^\d{6}$', accountNumber):
            break
    while True:
        amount = input("Enter amount to be paid: ")
        try:
            if Decimal(amount) > 0:
                break
            else:
                continue
        except Exception:
            # Exception indicates decimal error.
            continue
    amount = Decimal(amount)
    # The if statements checks where the money should go (overdraft/balance)
    if userMoney > amount or overdraft == 'True' and userMoney + overdraftAmount > amount:
        if userMoney > amount:
            userMoney -= amount
            file.pop(4)
            file.insert(4, userMoney)
        else:
            userMoney = 0
            goneIntoOverdraft = overdraftAmount - (amount - userMoney)
            now = datetime.now()
            current_time = "%s:%s %s / %s / %s" % (
            now.hour, now.minute, now.month, now.day, now.year)
            file = overdraftfunction(goneIntoOverdraft, email, current_time, file)
            file.pop(4)
            file.pop(4)
            file.insert(4, userMoney)
            file.insert(5, goneIntoOverdraft)
        now = datetime.now()
        current_time = "%s:%s %s / %s / %s\n" % (now.hour, now.minute, now.month, now.day, now.year)
        history_file = open(account + 'history.txt', 'a')
        history_file.write(current_time + '\n')
        history_file.write(str(-amount) + '\n')
        history_file.close()
        is_special(account, file)
        return replaceFile(account, file)
    else:
        print("Not enough money")
        return file


def menu(file):
    while True:
        print("Welcome to the menu. You may pick one of the following options:"
              "\n1. View your account details"
              "\n2. Change PIN"
              "\n3. Withdraw money"
              "\n4. Deposit money"
              "\n5. Pay bills"
              "\n6. View History"
              "\n7. Quit")
        navigation = input("Pick option: ")
        if navigation == '1':
            view(file)
        elif navigation == '2':
            file = pin(file[1], file[0], file)
        elif navigation == '3':
            file = withdraw(Decimal(file[4]), file[3], file, file[0], file[5])
        elif navigation == '4':
            file = deposit(file, Decimal(file[4]), file[0])
        elif navigation == '5':
            file = bills(file, Decimal(file[4]), file[0], file[3], file[2], file[5])
        elif navigation == '6':
            print_transaction(file[0])
        elif navigation == '7':
            print_transaction(file[0])
            return


def pins_check(pin_input):
    if os.path.exists('pins.txt'):
        pins = open('pins.txt', 'r')
        myFile = pins.readlines()
        pins.close()
        for pin in range(len(myFile)):
            new = myFile[pin].replace('\n', '')
            myFile.pop(pin)
            myFile.insert(pin, new)
        if pin_input in myFile:
            return False
        else:
            myPin = open('pins.txt', 'a')
            myPin.write(pin_input + '\n')
            myPin.close()
            return True

    else:
        pins = open('pins.txt', 'w')
        pins.write(pin_input + '\n')
        pins.close()
        return True

def signup():
    # Card input
    while True:
        card = input("Enter the card number(must be 4 digits): ")
        if not re.search(r'^\d{4}$', card):
            continue
        if equal(card):
            continue
        break
    # PIN input
    while True:
        pin = input("Enter the pin number(must be 4 digits): ")
        if not re.search(r'^\d{4}$', pin):
            continue
        if equal(pin):
            continue
        if pins_check(pin):
            break
        else:
            print("The pin already exists")
    # Gmail input
    while True:
        email = input("Enter email(gmail only): ")
        if '@gmail.com' in email:
            break
    # Overdraft protection input
    while True:
        print("Would you like to sign up for overdraft protection?")
        prompt_overdraft = input("y for yes, n for no, i for 'what is overdraft?' ")
        if prompt_overdraft == 'y' or prompt_overdraft == 'yes':
            overdraft = 'True'
            break
        elif prompt_overdraft == 'n' or prompt_overdraft == 'no':
            overdraft = 'False'
            break
        elif prompt_overdraft == 'i':
            print("Overdraft allows you to go beyond 0 to maximum of $500\n"
                  "Each time you go beyond the overdraft, you will be charged with 25% of your overdraft\n"
                  "An email will be sent to you each time you go beyond the overdraft. ")
    userFile = open(card + '.txt', 'w')
    userFile.write(card + '\n' + pin + '\n' + email + '\n' + overdraft + '\n' + '0' + '\n')
    if overdraft == 'True':
        userFile.write('500')
    else:
        userFile.write('Not in action')
    userFile.close()
    user_history_file = open(card + 'history.txt', 'w')
    user_history_file.close()
    sys.stdout.write("redirecting to login")
    name = ".....\n"
    for char in name:
        sys.stdout.write(char)
        sys.stdout.flush()
        time.sleep(.6)
    login()


def login():
    while True:
        card_login = input("Enter your card number: ")
        if not os.path.exists(card_login + '.txt'):
            continue
        break
    user_file = open(card_login + '.txt')
    userLines = user_file.readlines()
    # The process of removing the line spacing
    for line in range(len(userLines)):
        new = userLines[line].replace('\n', '')
        userLines.pop(line)
        userLines.insert(line, new)
    user_file.close()

    actual_pin = userLines[1]
    while True:
        pin_login = input("Enter your pin: ")
        if not pin_login == actual_pin:
            continue
        break

    menu(userLines)
    return


while True:
    enter = input("Would you like to sign in(I) or sign up(U): ".lower())
    if enter == 'i':
        login()
        break
    elif enter == 'u':
        signup()
        break

Instructions are here:
https://sites.google.com/site/delaneyteaching/functions--project