CS-PreRelease_Task35.py

'''
Task 3.5
By Mark Wu
@markwu.me
'''

# import os
# import re
# import datetime
# datetime is a good module to use to check date, but for demonstration purpose this is not used.

# Initialization
member_list = [] # List

# The following are the functions used in the program

def validateuserID(instring):
    if len(instring) == 6 and instring[0].isupper() and instring[1:3].islower() and instring[3:].isnumeric():
        return True
    else:
        return False

def validateDate(instring = ''):
    # input format: MMDDYYYY
    if len(instring) == 8 and instring.isnumeric():
        month = int(instring[:2])
        day = int(instring[2:4])
        year = int(instring[-4:])
        if 0 <= month <= 12 and 0 <= day <= 31 and 1800 <= year <= 2016:
            formatted_date = '%i-%i-%i' % (month, day, year)
            return formatted_date
    return ''


def input_name():
    instr = input("Please input member's name >>>") # string
    while not 0 < len(instr) < 25 or instr in (','):
        print("Invalid name. A valid name should be less than 25 characters. Please input again.")
        instr = input("Please input member's name >>>")
    return instr


def input_id(member_name=''):
    instr = input("Please input member ID for %s >>>" % member_name)
    while not validateuserID(instr):
        print("Invalid ID. Please try again.")
        instr = input("Please input member ID for %s >>>" % member_name)
    return instr


def input_phone(member_name=''):
    instr = input("Please input the phone number for %s (11 digits) >>>" % member_name)
    while not instr.isnumeric() or len(instr) != 11:
        print("Invalid Phone Number (Should be 11 digits). Please try again.")
        instr = input("Please input the phone number for %s (11 digits) >>>" % member_name)
    return instr

def input_date(member_name=''):
    instr = input("Please input the membership start date for %s (MM-DD-YYYY) >>>" % member_name)

    result = validateDate(instr) # blank string acts as False
    while not result:
        print("Invalid membership start date (MM-DD-YYYY).")
        instr = input("Please input the membership start date for %s (MM-DD-YYYY) >>>" % member_name)
        result = validateDate(instr)
    return result


# Check if file exists:
# file_found = os.path.isfile('record.txt') # Boolean
file_found = True # Can't do this validation because I can't import

if file_found:
    try:
        with open('record.txt') as myfile:
            # following code to check the format of the existing file
            content = myfile.readlines()
            for each in content:
                each_member = each.split(',')
                each_member[1] = each_member[1].strip() # remove line breakers
                member_list.append(each_member)
        print("Existing file found. All new input will be added to the file.")

    except:
        # # remove bad files
        # try:
        #     os.remove('record.txt')
        #     print("Invalid record format. Bad file removed.")
        # except:
        #     print("Invalid record format. But bad file removal failed!")
        # finally:
        print("Due to inconsistent file, program is aborted")
        exit()

# Ask user to input data for each members
for each in member_list:
    member_name = each[0]
    print("\nNow please add data for %s." % member_name)
    each.append(input_phone(member_name))
    each.append(input_date(member_name))

# Create New File and store the result
try:
    with open('record_appended.txt', mode='w') as myfile:
        for each in member_list:
            newline = ','.join(each)
            myfile.write(newline + '\n')
        print('Data successfully stored.')
except:
    print("Can't create file! Please check file permission.")