def read_reminder_params() -> Optional[Reminder]:
"""
read parameters from the user and build a Reminder object.
return a Reminder object, or None, meaning no action required (e.g. wrong
user parameters, or user aborted the action)
"""
title = input('What\'s the reminder: ')
dt = parse_time_str(input('When do you want to be reminded: '))
if dt is not None:
print(f'\n"{title}" on {dt.strftime(DATE_FORMAT)}\n')
save = read_yes_no('Do you want to save this?')
if save:
return Reminder(id=gen_id(), title=title, dt=dt)
def invoke_operation(args):
"""
inspect the program arguments and invoke the appropriate operation
"""
client = RemindersClient()
if args.interactive or args.create:
# prepare the reminder to create
if args.interactive:
reminder = read_reminder_params()
else:
title, time_str = args.create
dt = parse_time_str(time_str)
if dt is None:
return
reminder = Reminder(id=gen_id(),
title=title,
dt=dt,
all_day=args.all_day)
# execute creation if applicable
if reminder is not None:
if client.create_reminder(reminder):
print('Reminder set successfully:')
print(reminder)
elif args.get:
id = args.get
reminder = client.get_reminder(reminder_id=id)
if reminder is not None:
print(reminder)
elif args.delete:
id = args.delete
if client.delete_reminder(reminder_id=id):
print('Reminder deleted successfully')
elif args.list:
num_reminders = args.list
if num_reminders < 0:
print('argument to list command must be positive')
return
reminders = client.list_reminders(num_reminders=num_reminders)
if reminders is not None:
for r in sorted(reminders):
print(r)
else:
print('Wrong usage: no valid action was specified\n'
'please read help menu (-h) to see correct usage')