Palindrome Dates

## Name: Jaewon Son
## Date: October 15 2023
## Honor Statement: I have not given or received any unauthorized assistance on this assignment.
## Link: https://youtu.be/KQdLfmQy13c


def date1():

    """Generate a list of dates in the DD/MM/YYYY format.

    Returns:
        list: Returns a list of dates for Jan, Mar, May, Jul, Aug. Oct, and Dec in the 21st century.
    """

    month_with_31_days = ['01', '03', '05', '07', '08', '10', '12']

    date_list1 = []

    for year in range(2000, 2100):
        for month in month_with_31_days:
            for day in range(1, 32):   # 31 days
                date = f"{day}/{month}/{year}"   # DD/MM/YYYY format
                date = date.zfill(10)   # Fixed as a 10-character string
                date_list1.append(date)

    return date_list1


def date2():

    """Generate a list of dates in the DD/MM/YYYY format.

    Returns:
        list: Returns a list of dates for Apr, Jun, Sep, and Nov in the 21st century.
    """

    month_with_30_days = ['04', '06', '09', '11']

    date_list2 = []

    for year in range(2000, 2100):
        for month in month_with_30_days:
            for day in range(1, 31):   # 30 days
                date = f"{day}/{month}/{year}"   # DD/MM/YYYY format
                date = date.zfill(10)   # Fixed as a 10-character string
                date_list2.append(date)

    return date_list2


def date3():

    """Generate a list of dates in the DD/MM/YYYY format.

    Returns:
        list: Returns a list of dates for Feb in the 21st century.
    """

    month_with_28_days = ['02']

    date_list3 = []

    for year in range(2000, 2100):
        for month in month_with_28_days:
            for day in range(1, 29):   # 28 days
                date = f"{day}/{month}/{year}"   # DD/MM/YYYY format
                date = date.zfill(10)   # Fixed as a 10-character string
                date_list3.append(date)

    return date_list3


def palindrome_date(date_list):

    """Test if a date is a palindrome date.

    Returns:
        list: Returns a list of palindrome dates.
    """

    palindrome_date_list = []

    for date in date_list:   # Checking whether a date is a palindrome or not.
        if date[0] == date[9]:
            if date[1] == date[8]:
                if date[3] == date[7]:
                    if date[4] == date[6]:
                        palindrome_date_list.append(date)

    return palindrome_date_list


def write_text_file(palindrome_dates_list):

    """Write palindrome dates to a text file.
    """
   
    palindrome_dates_list_file = open(r"C:\Users\LG\Desktop\DEPAUL UNIV\2023 Fall\Python Programming\DSC 430 - Week 6\JaewonSon_Assignment_0601_Palindrome_Dates.txt", 'w')

    for palindrome_dates in palindrome_dates_list:
        palindrome_dates_list_file.write(f"{palindrome_dates}\n")   # Write palindrome dates into a separate line

    palindrome_dates_list_file.close()


def main():

    """Main function for the Palindrome Dates.
    """

    date_list = date1() + date2() + date3()
    date_list.sort()

    palindrome_date_list = palindrome_date(date_list)
    
    write_text_file(palindrome_date_list)


if __name__ == "__main__":
    main()