124 lines
4.1 KiB
Python
124 lines
4.1 KiB
Python
'''
|
|
This module provides functions for interactive command line UIs.
|
|
'''
|
|
####################################################################################################
|
|
## ABC_CHOOSER #####################################################################################
|
|
####################################################################################################
|
|
|
|
def _abc_make_option_letters(options):
|
|
import math
|
|
import string
|
|
from voussoirkit import basenumber
|
|
option_letters = {}
|
|
letter_length = math.ceil(len(options) / 26)
|
|
for (index, option) in enumerate(options):
|
|
letter = basenumber.to_base(index, 26, alphabet=string.ascii_lowercase)
|
|
letter = letter.rjust(letter_length, 'a')
|
|
option_letters[letter] = option
|
|
|
|
return option_letters
|
|
|
|
def abc_chooser(options, prompt='', must_pick=False):
|
|
'''
|
|
Given a list of options, the user will pick one by the corresponding letter.
|
|
The return value is the item from the options list, or None if must_pick is
|
|
False and the user entered nothing.
|
|
'''
|
|
option_letters = _abc_make_option_letters(options)
|
|
|
|
while True:
|
|
message = []
|
|
for (letter, option) in option_letters.items():
|
|
message.append(f'{letter}. {option}')
|
|
print('\n'.join(message))
|
|
choice = input(prompt).strip().lower()
|
|
|
|
if not choice:
|
|
if must_pick:
|
|
print()
|
|
continue
|
|
else:
|
|
return
|
|
|
|
if choice not in option_letters:
|
|
print()
|
|
continue
|
|
|
|
return option_letters[choice]
|
|
|
|
def abc_chooser_many(options, prompt='', label='X'):
|
|
'''
|
|
Given a list of options, the user may pick zero or many options by their
|
|
corresponding letter. They can toggle the options on and off as long as
|
|
they like, and submit their selection by entering one more blank line.
|
|
The return value is a list of items from the options list.
|
|
'''
|
|
selected = set()
|
|
option_letters = _abc_make_option_letters(options)
|
|
|
|
while True:
|
|
message = []
|
|
for (letter, option) in option_letters.items():
|
|
this_label = label if letter in selected else ''
|
|
this_label = this_label.center(len(label))
|
|
message.append(f'{letter}. [{this_label}] {option}')
|
|
print('\n'.join(message))
|
|
|
|
choice = input(prompt).strip().lower()
|
|
|
|
if not choice:
|
|
break
|
|
|
|
if choice not in option_letters:
|
|
print()
|
|
continue
|
|
|
|
if choice in selected:
|
|
selected.remove(choice)
|
|
else:
|
|
selected.add(choice)
|
|
print()
|
|
|
|
choices = [option_letters[letter] for letter in option_letters if letter in selected]
|
|
return choices
|
|
|
|
####################################################################################################
|
|
## GETPERMISSION ###################################################################################
|
|
####################################################################################################
|
|
|
|
YES_STRINGS = ['yes', 'y']
|
|
NO_STRINGS = ['no', 'n']
|
|
|
|
def getpermission(
|
|
prompt=None,
|
|
*,
|
|
yes_strings=YES_STRINGS,
|
|
no_strings=NO_STRINGS,
|
|
must_pick=False,
|
|
):
|
|
'''
|
|
Prompt the user with a yes or no question.
|
|
|
|
Return True for yes, False for no, and None if undecided.
|
|
|
|
You can customize the strings that mean yes or no. For example, you could
|
|
create a "type the name of the thing you're about to delete" prompt.
|
|
|
|
If `must_pick`, then undecided is not allowed and the input will repeat
|
|
until they choose an acceptable answer. Either way, the intended usage of
|
|
`if getpermission():` will always only accept in case of explicit yes.
|
|
'''
|
|
if prompt is not None:
|
|
print(prompt)
|
|
while True:
|
|
answer = input(f'{yes_strings[0]}/{no_strings[0]}> ').strip()
|
|
yes = answer.lower() in (option.lower() for option in yes_strings)
|
|
no = answer.lower() in (option.lower() for option in no_strings)
|
|
if yes or no or not must_pick:
|
|
break
|
|
|
|
if yes:
|
|
return True
|
|
if no:
|
|
return False
|
|
return None
|