512 lines
19 KiB
Python
512 lines
19 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
|
|
import os
|
|
import random
|
|
import re
|
|
import sys
|
|
from select import select
|
|
|
|
import conf
|
|
from db import User, Session
|
|
from helpers import search_user, search_product, guess_data_type, argmax
|
|
from text_interface import context_commands, local_help_commands, help_commands, \
|
|
exit_commands
|
|
|
|
|
|
class ExitMenu(Exception):
|
|
pass
|
|
|
|
|
|
class Menu(object):
|
|
def __init__(self, name, items=None, prompt='> ',
|
|
return_index=True,
|
|
exit_msg=None, exit_confirm_msg=None, exit_disallowed_msg=None,
|
|
help_text=None, uses_db=False):
|
|
self.name = name
|
|
self.items = items if items is not None else []
|
|
self.prompt = prompt
|
|
self.return_index = return_index
|
|
self.exit_msg = exit_msg
|
|
self.exit_confirm_msg = exit_confirm_msg
|
|
self.exit_disallowed_msg = exit_disallowed_msg
|
|
self.help_text = help_text
|
|
self.context = None
|
|
self.uses_db = uses_db
|
|
self.session = None
|
|
|
|
def exit_menu(self):
|
|
if self.exit_disallowed_msg is not None:
|
|
print(self.exit_disallowed_msg)
|
|
return
|
|
if self.exit_confirm_msg is not None:
|
|
if not self.confirm(self.exit_confirm_msg, default=True):
|
|
return
|
|
raise ExitMenu()
|
|
|
|
def at_exit(self):
|
|
if self.exit_msg:
|
|
print(self.exit_msg)
|
|
|
|
def set_context(self, string, display=True):
|
|
self.context = string
|
|
if self.context is not None and display:
|
|
print(self.context)
|
|
|
|
def add_to_context(self, string):
|
|
self.context += string
|
|
|
|
def printc(self, string):
|
|
print(string)
|
|
if self.context is None:
|
|
self.context = string
|
|
else:
|
|
self.context += '\n' + string
|
|
|
|
def show_context(self):
|
|
print(self.header())
|
|
if self.context is not None:
|
|
print(self.context)
|
|
|
|
def item_is_submenu(self, i):
|
|
return isinstance(self.items[i], Menu)
|
|
|
|
def item_name(self, i):
|
|
if self.item_is_submenu(i):
|
|
return self.items[i].name
|
|
elif isinstance(self.items[i], tuple):
|
|
return self.items[i][1]
|
|
else:
|
|
return self.items[i]
|
|
|
|
def item_value(self, i):
|
|
if isinstance(self.items[i], tuple):
|
|
return self.items[i][0]
|
|
if self.return_index:
|
|
return i
|
|
return self.items[i]
|
|
|
|
# TODO: Allow default
|
|
def input_str(self, prompt=None, regex=None, length_range=(None, None),
|
|
empty_string_is_none=False, timeout=None):
|
|
if prompt is None:
|
|
prompt = self.prompt
|
|
if regex is not None:
|
|
while True:
|
|
result = self.input_str(prompt, length_range=length_range,
|
|
empty_string_is_none=empty_string_is_none)
|
|
if result is None or re.match(regex + '$', result):
|
|
return result
|
|
else:
|
|
print(f'Value must match regular expression "{regex}"')
|
|
if length_range != (None, None):
|
|
while True:
|
|
result = self.input_str(prompt, empty_string_is_none=empty_string_is_none)
|
|
if result is None:
|
|
length = 0
|
|
else:
|
|
length = len(result)
|
|
if ((length_range[0] and length < length_range[0]) or
|
|
(length_range[1] and length > length_range[1])):
|
|
if length_range[0] and length_range[1]:
|
|
print(f'Value must have length in range [{length_range[0]:d}, {length_range[1]:d}]')
|
|
elif length_range[0]:
|
|
print(f'Value must have length at least {length_range[0]:d}')
|
|
else:
|
|
print(f'Value must have length at most {length_range[1]:d}')
|
|
else:
|
|
return result
|
|
while True:
|
|
try:
|
|
if timeout:
|
|
# assuming line buffering
|
|
sys.stdout.write(prompt)
|
|
sys.stdout.flush()
|
|
rlist, _, _ = select([sys.stdin], [], [], timeout)
|
|
if not rlist:
|
|
# timeout occurred, simulate empty line
|
|
result = ''
|
|
else:
|
|
result = input().strip()
|
|
else:
|
|
result = input(prompt).strip()
|
|
except EOFError:
|
|
print('quit')
|
|
self.exit_menu()
|
|
continue
|
|
if result in exit_commands:
|
|
self.exit_menu()
|
|
continue
|
|
if result in help_commands:
|
|
self.general_help()
|
|
continue
|
|
if result in local_help_commands:
|
|
self.local_help()
|
|
continue
|
|
if result in context_commands:
|
|
self.show_context()
|
|
continue
|
|
if self.special_input_options(result):
|
|
continue
|
|
if empty_string_is_none and result == '':
|
|
return None
|
|
return result
|
|
|
|
def special_input_options(self, result):
|
|
"""
|
|
Handles special, magic input for input_str
|
|
|
|
Override this in subclasses to implement magic menu
|
|
choices. Return True if str was some valid magic menu
|
|
choice, False otherwise.
|
|
"""
|
|
return False
|
|
|
|
def special_input_choice(self, in_str):
|
|
"""
|
|
Handle choices which are not simply menu items.
|
|
|
|
Override this in subclasses to implement magic menu
|
|
choices. Return True if str was some valid magic menu
|
|
choice, False otherwise.
|
|
"""
|
|
return False
|
|
|
|
def input_choice(self, number_of_choices, prompt=None):
|
|
if prompt is None:
|
|
prompt = self.prompt
|
|
while True:
|
|
result = self.input_str(prompt)
|
|
if result == '':
|
|
print('Please enter something')
|
|
# 'c' in main menu to change colours
|
|
elif result == 'c':
|
|
os.system('echo -e "\033[' + str(random.randint(40, 49)) + ';' + str(random.randint(30, 37)) + ';5m"')
|
|
os.system('clear')
|
|
self.show_context()
|
|
|
|
# 'cs' in main menu to change colours back to default
|
|
elif result == 'cs':
|
|
os.system('echo -e "\033[0m"')
|
|
os.system('clear')
|
|
self.show_context()
|
|
|
|
else:
|
|
if result.isdigit():
|
|
choice = int(result)
|
|
if choice == 0 and 10 <= number_of_choices:
|
|
return 10
|
|
if 0 < choice <= number_of_choices:
|
|
return choice
|
|
if not self.special_input_choice(result):
|
|
self.invalid_menu_choice(result)
|
|
|
|
def invalid_menu_choice(self, in_str):
|
|
print('Please enter a valid choice.')
|
|
|
|
def input_int(self, prompt=None, allowed_range=(None, None), null_allowed=False, default=None):
|
|
# TODO: Proper default handling
|
|
if prompt is None:
|
|
prompt = self.prompt
|
|
while True:
|
|
result = self.input_str(prompt)
|
|
if result == '':
|
|
if default is not None:
|
|
return default
|
|
elif null_allowed:
|
|
return False
|
|
try:
|
|
value = int(result)
|
|
if ((allowed_range[0] and value < allowed_range[0]) or
|
|
(allowed_range[1] and value > allowed_range[1])):
|
|
if allowed_range[0] and allowed_range[1]:
|
|
print(f'Value must be in range [{allowed_range[0]:d}, {allowed_range[1]:d}]')
|
|
elif allowed_range[0]:
|
|
print(f'Value must be at least {allowed_range[0]:d}')
|
|
else:
|
|
print(f'Value must be at most {allowed_range[1]:d}')
|
|
else:
|
|
return value
|
|
except ValueError:
|
|
print("Please enter an integer")
|
|
|
|
def input_user(self, prompt=None):
|
|
user = None
|
|
while user is None:
|
|
user = self.retrieve_user(self.input_str(prompt))
|
|
return user
|
|
|
|
def retrieve_user(self, search_str):
|
|
return self.search_ui(search_user, search_str, 'user')
|
|
|
|
def input_product(self, prompt=None):
|
|
product = None
|
|
while product is None:
|
|
product = self.retrieve_product(self.input_str(prompt))
|
|
return product
|
|
|
|
def retrieve_product(self, search_str):
|
|
return self.search_ui(search_product, search_str, 'product')
|
|
|
|
def input_thing(self, prompt=None, permitted_things=('user', 'product'),
|
|
add_nonexisting=(), empty_input_permitted=False, find_hidden_products=True):
|
|
result = None
|
|
while result is None:
|
|
search_str = self.input_str(prompt)
|
|
if search_str == '' and empty_input_permitted:
|
|
return None
|
|
result = self.search_for_thing(search_str, permitted_things, add_nonexisting, find_hidden_products)
|
|
return result
|
|
|
|
def input_multiple(self, prompt=None, permitted_things=('user', 'product'),
|
|
add_nonexisting=(), empty_input_permitted=False, find_hidden_products=True):
|
|
result = None
|
|
num = 0
|
|
while result is None:
|
|
search_str = self.input_str(prompt)
|
|
search_lst = search_str.split(" ")
|
|
if search_str == '' and empty_input_permitted:
|
|
return None
|
|
else:
|
|
result = self.search_for_thing(search_str, permitted_things, add_nonexisting, find_hidden_products)
|
|
num = 1
|
|
|
|
if (result is None) and (len(search_lst) > 1):
|
|
print('Interpreting input as "<number> <product>"')
|
|
try:
|
|
num = int(search_lst[0])
|
|
result = self.search_for_thing(" ".join(search_lst[1:]), permitted_things, add_nonexisting,
|
|
find_hidden_products)
|
|
# Her kan det legges inn en except ValueError,
|
|
# men da blir det fort mye plaging av brukeren
|
|
except Exception as e:
|
|
print(e)
|
|
return result, num
|
|
|
|
def search_for_thing(self, search_str, permitted_things=('user', 'product'),
|
|
add_non_existing=(), find_hidden_products=True):
|
|
search_fun = {'user': search_user,
|
|
'product': search_product}
|
|
results = {}
|
|
result_values = {}
|
|
for thing in permitted_things:
|
|
results[thing] = search_fun[thing](search_str, self.session, find_hidden_products)
|
|
result_values[thing] = self.search_result_value(results[thing])
|
|
selected_thing = argmax(result_values)
|
|
if not results[selected_thing]:
|
|
thing_for_type = {'card': 'user', 'username': 'user',
|
|
'bar_code': 'product', 'rfid': 'rfid'}
|
|
type_guess = guess_data_type(search_str)
|
|
if type_guess is not None and thing_for_type[type_guess] in add_non_existing:
|
|
return self.search_add(search_str)
|
|
# print('No match found for "%s".' % search_str)
|
|
return None
|
|
return self.search_ui2(search_str, results[selected_thing], selected_thing)
|
|
|
|
@staticmethod
|
|
def search_result_value(result):
|
|
if result is None:
|
|
return 0
|
|
if not isinstance(result, list):
|
|
return 3
|
|
if len(result) == 0:
|
|
return 0
|
|
if len(result) == 1:
|
|
return 2
|
|
return 1
|
|
|
|
def search_add(self, string):
|
|
type_guess = guess_data_type(string)
|
|
if type_guess == 'username':
|
|
print(f'"{string}" looks like a username, but no such user exists.')
|
|
if self.confirm(f'Create user {string}?'):
|
|
user = User(string, None)
|
|
self.session.add(user)
|
|
return user
|
|
return None
|
|
if type_guess == 'card':
|
|
selector = Selector(f'"{string}" looks like a card number, but no user with that card number exists.',
|
|
[('create', f'Create user with card number {string}'),
|
|
('set', f'Set card number of an existing user to {string}')])
|
|
selection = selector.execute()
|
|
if selection == 'create':
|
|
username = self.input_str('Username for new user (should be same as PVV username)> ',
|
|
User.name_re, (1, 10))
|
|
user = User(username, string)
|
|
self.session.add(user)
|
|
return user
|
|
if selection == 'set':
|
|
user = self.input_user('User to set card number for> ')
|
|
old_card = user.card
|
|
user.card = string
|
|
print(f'Card number of {user.name} set to {string} (was {old_card})')
|
|
return user
|
|
return None
|
|
if type_guess == 'bar_code':
|
|
print('"%s" looks like the bar code for a product, but no such product exists.' % string)
|
|
return None
|
|
|
|
def search_ui(self, search_fun, search_str, thing):
|
|
result = search_fun(search_str, self.session)
|
|
return self.search_ui2(search_str, result, thing)
|
|
|
|
def search_ui2(self, search_str, result, thing):
|
|
if not isinstance(result, list):
|
|
return result
|
|
if len(result) == 0:
|
|
print(f'No {thing}s matching "{search_str}"')
|
|
return None
|
|
if len(result) == 1:
|
|
msg = f'One {thing} matching "{search_str}": {str(result[0])}. Use this?'
|
|
if self.confirm(msg, default=True):
|
|
return result[0]
|
|
return None
|
|
limit = 9
|
|
if len(result) > limit:
|
|
select_header = f'{len(result):d} {thing}s matching "{search_str}"; showing first {limit:d}'
|
|
select_items = result[:limit]
|
|
else:
|
|
select_header = f'{len(result):d} {thing}s matching "{search_str}"'
|
|
select_items = result
|
|
selector = Selector(select_header, items=select_items,
|
|
return_index=False)
|
|
return selector.execute()
|
|
|
|
@staticmethod
|
|
def confirm(prompt, default=None, timeout=None):
|
|
return ConfirmMenu(prompt, default, timeout).execute()
|
|
|
|
def header(self):
|
|
return f"[{self.name}]"
|
|
|
|
def print_header(self):
|
|
print("")
|
|
print(self.header())
|
|
|
|
def pause(self):
|
|
self.input_str('.')
|
|
|
|
@staticmethod
|
|
def general_help():
|
|
print('''
|
|
DIBBLER HELP
|
|
|
|
The following commands are recognized (almost) everywhere:
|
|
|
|
help, ? -- display this help
|
|
what, ?? -- redisplay the current context
|
|
help!, ??? -- display context-specific help (if any)
|
|
faq -- display frequently asked questions (with answers)
|
|
exit, quit, etc. -- exit from the current menu
|
|
|
|
When prompted for a user, you can type (parts of) the user name or
|
|
card number. When prompted for a product, you can type (parts of) the
|
|
product name or barcode.
|
|
|
|
About payment and "credit": When paying for something, use either
|
|
Dibbler or the good old money box -- never both at the same time.
|
|
Dibbler keeps track of a "credit" for each user, which is the amount
|
|
of money PVVVV owes the user. This value decreases with the
|
|
appropriate amount when you register a purchase, and you may increase
|
|
it by putting money in the box and using the "Adjust credit" menu.
|
|
''')
|
|
|
|
def local_help(self):
|
|
if self.help_text is None:
|
|
print('no help here')
|
|
else:
|
|
print('')
|
|
print(f'Help for {self.header()}:')
|
|
print(self.help_text)
|
|
|
|
def execute(self, **kwargs):
|
|
self.set_context(None)
|
|
try:
|
|
if self.uses_db and not self.session:
|
|
self.session = Session()
|
|
return self._execute(**kwargs)
|
|
except ExitMenu:
|
|
self.at_exit()
|
|
return None
|
|
finally:
|
|
if self.session is not None:
|
|
self.session.close()
|
|
self.session = None
|
|
|
|
def _execute(self, **kwargs):
|
|
# TODO: This is a very awkward line. Is there a better way of doing this?
|
|
line_format = '%' + str(len(str(len(self.items)))) + 'd ) %s'
|
|
while True:
|
|
self.print_header()
|
|
self.set_context(None)
|
|
if len(self.items) == 0:
|
|
self.printc('(empty menu)')
|
|
self.pause()
|
|
return None
|
|
for i in range(len(self.items)):
|
|
self.printc(line_format % (i + 1, self.item_name(i)))
|
|
item_i = self.input_choice(len(self.items), prompt=self.prompt) - 1
|
|
if self.item_is_submenu(item_i):
|
|
self.items[item_i].execute()
|
|
else:
|
|
return self.item_value(item_i)
|
|
|
|
|
|
class MessageMenu(Menu):
|
|
def __init__(self, name, message, pause_after_message=True):
|
|
Menu.__init__(self, name)
|
|
self.message = message.strip()
|
|
self.pause_after_message = pause_after_message
|
|
|
|
def _execute(self):
|
|
self.print_header()
|
|
print('')
|
|
print(self.message)
|
|
if self.pause_after_message:
|
|
self.pause()
|
|
|
|
|
|
class ConfirmMenu(Menu):
|
|
def __init__(self, prompt='confirm?', default=None, timeout=0):
|
|
Menu.__init__(self, 'question', prompt=prompt,
|
|
exit_disallowed_msg='Please answer yes or no')
|
|
self.default = default
|
|
self.timeout = timeout
|
|
|
|
def _execute(self):
|
|
options = {True: '[y]/n', False: 'y/[n]', None: 'y/n'}[self.default]
|
|
while True:
|
|
result = self.input_str(f'{self.prompt} ({options}): ', timeout=self.timeout)
|
|
result = result.lower().strip()
|
|
if result in ['y', 'yes']:
|
|
return True
|
|
elif result in ['n', 'no']:
|
|
return False
|
|
elif self.default is not None and result == '':
|
|
return self.default
|
|
else:
|
|
print('Please answer yes or no')
|
|
|
|
|
|
class Selector(Menu):
|
|
def __init__(self, name, items=None, prompt='select> ', return_index=True, exit_msg=None, exit_confirm_msg=None,
|
|
help_text=None):
|
|
if items is None:
|
|
items = []
|
|
Menu.__init__(self, name, items, prompt, return_index, exit_msg)
|
|
|
|
def header(self):
|
|
return self.name
|
|
|
|
def print_header(self):
|
|
print(self.header())
|
|
|
|
def local_help(self):
|
|
if self.help_text is None:
|
|
print('This is a selection menu. Enter one of the listed numbers, or')
|
|
print('\'exit\' to go out and do something else.')
|
|
else:
|
|
print('')
|
|
print(f'Help for selector ({self.name}):')
|
|
print(self.help_text)
|