Alarm Clock v2.0

Alarm Clock v2.0

from time import ctime, clock, sleep
import winsound
import sys

def tadas_time(n):
    return round((int(n)-1) * 1.79 + 1, 1)

def get_num_tadas_from_user():
    try:
        print("Enter the number of taDAHs desired; Entering nothing will set the number to 1")
        n = input("\nHow many tadas?> ")
        if not n:
            print("The number of taDAHs was set to 1")
            return 1
        if int(n) < 1:
            print("The number of taDAHs must be at least 1, or the alarm won't sound")
            raise ValueError
        if int(n) > 3:
            print("Are you sure you want", n, "taDAHs? That will take", tadas_time(n), "seconds")
            print("Hit enter for 'yes'; enter any character if you want to change the number")
            ans = input("\nanswer?> ")
            if ans == '':
                print("The number of taDAHs was set to", n)
                return int(n)
            else:
                raise ValueError
        print("The number of taDAHs was set to", n)
        return int(n)
    except ValueError:
        return get_num_tadas_from_user()

def get_message_from_user():
    """
    The message is printed when the alarm rings.
    The idea is that the message will tell the user the reason
    for the alarm. Examples are, "Feed the cat", "Go to bed", "Write to Nick".
    """
    print("""
    Enter a message about what the alarm ringing means,
    in case you forget, or have several alarms set.
    Enter nothing if no message.
    """)
    message = input("\nMessage?> ")
    if message == '':
        print("no message entered")
        return None
    else:
        return message

def get_alarm_time_from_user(flag):
    if flag:
        print("""
        Enter an alarm time in 24-hour time.
        Both hours and minutes should be in 2 digits, separated by a colon.
        13:00, 22:45, 02:30, 00:05
        Military time will be converted to 24-hour time
        1300 -> 13:00, 0005 -> 00:05
        """)

    alarm_time = input("alarm time?> ")


    try:
        # The user uses something other than a colon (say a semicolon)
        # to separate hour and minute
        if len(alarm_time) == 5 and alarm_time[2] != ':':
            print("A colon should come between hours and minutes: 10:45.\n")
            raise ValueError

        if ':' not in alarm_time:
            if len(alarm_time) != 4:
                print("Military time should have exactly 4 digits.\n")
                raise ValueError
            if not alarm_time.isdigit():
                print("There's a non-digit in either the hours or minutes or both.\n")
                raise ValueError
            alarm_time = alarm_time[:2] + ':' + alarm_time[2:]

        if not (alarm_time.replace(':', '').isdigit()):
            print("You've put a non-digit in either the hours or minutes or both.\n")
            raise ValueError

        hour, minute = alarm_time.split(':')
        if len(hour) != 2 or len(minute) != 2:
            print("Both hours and minutes should have exactly 2 digits.\n")
            raise ValueError

        if not 0 <= int(hour) < 24:
            print("Hours should be >= 0 and less than 24.\n")
            raise ValueError

        if not 0 <= int(minute) < 60:
            print("Minutes should be >= 0 and less than 60.\n")
            raise ValueError

        print("\nIs", alarm_time, "the time you want? Hit enter for 'yes'; enter any character for 'no'.")
        ans = input("\nanswer?> ")
        if ans == '':
            return alarm_time
        else:
            flag = False
            return get_alarm_time_from_user(flag)
        return alarm_time

    except ValueError:
        flag = False
        return get_alarm_time_from_user(flag)

def tada_or_tadas(num_tadas):
    """
    Make "tada" plural when appropriate.

    "tada" is one of the sounds that come with Windows: taDAH.
    """
    if num_tadas == 1:
        return "taDAH"
    else:
        return "taDAHs"

def time2seconds(alarm_time):
    """time_string format = hh:mm, returns seconds as int."""
    hour, minute = alarm_time.split(':')
    return int(hour)*3600 + int(minute)*60

def today_or_tomorrow(alarm_time):
    now = ctime()[11:16]
    if time2seconds(now) > time2seconds(alarm_time):
        return "tomorrow"
    else:
        return "today"

def print_summary(alarm_time, today_tomorrow, num_tadas, message):
    print("\nThe alarm is set to ring at", alarm_time, today_tomorrow)
    if message:
        print(" with ", num_tadas, " ", tada_or_tadas(num_tadas), " and message, '", message, "'", sep='')
    else:
        print("with", num_tadas, tada_or_tadas(num_tadas), "and no message.")

def display_current_time():
    """
    Prints the current time as 24-hour time -- but no seconds.
    13:07, 05:00, 23:59, 00:02, etc.
    Each printing overwrites the previous one.
    """
    sys.stdout.flush()
    print("The time now is", ctime()[11:16], "\r", end='')

def main():
    # the flag will prevent the user being repeated shown all the instructions about entering alarm time.
    flag = True
    print("\n" * 9)

    # Get input from user.
    num_tadas = get_num_tadas_from_user()
    message = get_message_from_user()
    alarm_time = get_alarm_time_from_user(flag)

    # Print summary of alarm info.
    today_tomorrow = today_or_tomorrow(alarm_time)
    print_summary(alarm_time, today_tomorrow, num_tadas, message)

    # Main loop (wait until alarm time).
    print()
    while alarm_time != ctime()[11:16]:
        sleep(0.1)
        display_current_time()

    # Sound alarm
    for tada in range(0, num_tadas):
        winsound.PlaySound("/P31Working/Sounds/TaDa", winsound.SND_ALIAS)

    # Display alarm message and close.
    if message:
        print("\nmessage:", message, "\n")
    print()
    print("Hit Enter to close Alarm Clock.")
    input()


if __name__ == '__main__':
    main()