CHALLENGE: 

Create the login functionality. Assuming that a user has now registered, they should be able to log in to the system using their unique username and secure password. If what they enters matches what is stored in the file, they're in!

SUGGESTED SOLUTION / CODE: 

Note: See if you can do better (and you should be able to). The solutions provided are basic, and allow for discussion on possible alternative methods and solutions.

#Netflix type system demo - FakeFlix
import csv
import sys
import string #for use in the secure password and other parts of the program

def main():
   menu()

def menu():
    print("************Welcome to FakeFlix Demo**************")
    print()

    choice = input("""
                      A: Please Register
                      B: Login
                      Q: Logout

                      Please enter your choice: """)

    if choice == "A" or choice =="a":
        register()
    elif choice == "B" or choice =="b":
        login()
    elif choice=="Q" or choice=="q":
        sys.exit
    else:
        print("You must only select either A or B")
        print("Please try again")
        menu()

def long_enough(pw):
    'Password must be at least 6 characters'
    return len(pw) >= 6

def short_enough(pw):
    'Password cannot be more than 12 characters'
    return len(pw) <= 12

def has_lowercase(pw):
    'Password must contain a lowercase letter'
    return len(set(string.ascii_lowercase).intersection(pw)) > 0

def has_uppercase(pw):
    'Password must contain an uppercase letter'
    return len(set(string.ascii_uppercase).intersection(pw)) > 0

def has_numeric(pw):
    'Password must contain a digit'
    return len(set(string.digits).intersection(pw)) > 0

def has_special(pw):
    'Password must contain a special character'
    return len(set(string.punctuation).intersection(pw)) > 0

def test_password(pw, tests=[long_enough, short_enough, has_lowercase, has_uppercase, has_numeric, has_special]):
    for test in tests:
        if not test(pw):
            print(test.__doc__)
            return False
    return True


def register():
  
    #user is prompted to input all the required fields
    print("Enter first name")
    global firstname
    firstname=input()
    print("Enter surname")
    global surname
    surname=input()
    print("Enter Date of Birth Format: dd/mm/yy")
    global dob
    dob=input()
    print("Enter first line of address")
    global firstlineaddress
    firstlineaddress=input()
    print("Enter Postcode")
    global postcode
    postcode=input()
    print("Enter Gender")
    global gender
    gender=input()
    print("Enter main genre of interest")
    global interest
    interest=input()
    print("Enter email address")
    global email
    email=input()
    substring=dob[-4:] #this sets the date of birth (last four characters that is the year) to substring
    print("Your unique username is", firstname+surname+substring)
    global username
    username=firstname+surname+substring
   #secure password checker
    passwordchecker()
    
                   

def passwordchecker():
   password=input("Please enter a password - must be secure and meet our format requirements")
   if test_password(password):
       with open('fakeflixfile.txt','a') as fakeflixfile:
        fakeflixfileWriter=csv.writer(fakeflixfile)
        fakeflixfileWriter.writerow([username,password,firstname,surname,dob,firstlineaddress,postcode,gender,interest,email])
        print("Record has been written to file")
        fakeflixfile.close()
        menu()
   else:
         passwordchecker()
         
    
def login():
   #set a variable (boolean type) to true if the user is NOT logged on
   notloggedin="true"
   #while the user is not logged on (i.e. while the login credentials provided do not work ...)
   while notloggedin=="true":
      print("***WELCOME - PLEASE LOGIN")
   
   #open the file we are reading from
      with open("fakeflixfile.txt",'r') as fakeflixfile:
     #prompt the user to enter their login details
         username=input("Enter username:-")
         password=input("Enter password:-")
      #call upon our reader (this allows us to work with our file)
         fakeflixfileReader=csv.reader(fakeflixfile)
      #for each row that is read by the Reader
         for row in fakeflixfileReader:
            for field in row:
            
            #search for the required matches in user entry against what is stored in the file
               if field==username and row[1]==password:
                  print("Granted")
                  displayfilms()
                  notloggedin="false"
                  
              
               
         
                                 
              
     
     

def displayfilms():
   print("*******************WELCOME to FAKEFLIX**************************")
   print("What would you like to watch today?")
   
      
    
#the program is initiated, so to speak, here
main()

Analyse

Write your own summary of the problem. What are your objectives? List the success criteria

Design Tools

Designing something or writing out some pseudocode before you actually write code is always a good idea! Get in to the habit of doing so! You can draw your flowchart here and screenshot it.

Try it yourself

Testing Table

You may want to read a little about Testing first. A teacher may go through some examples with you. Feel free to fill in the test table here, and screenshot it in to your powerpoint. Testing is absolutely essential once you have created a program!

Test No.	Description	Test Data(input)	Expected Outcome	Actual Outcome	Further Action?
1	Describe your test here. Is it a valid, valid-extreme,invalid, invalid extreme, or borderline test?
2
3
4
5

Coming soon!