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This commit is contained in:
Christoffer Viken 2017-02-20 12:19:03 +00:00
parent 4d254c612f
commit 12ad58961c
10 changed files with 1538 additions and 1448 deletions
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1502
text_based.py
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8
text_interface/__init__.py Normal file
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# -*- coding: utf-8 -*-
exit_commands = ['exit', 'abort', 'quit', 'bye', 'eat flaming death', 'q']
help_commands = ['help', '?']
context_commands = ['what', '??']
local_help_commands = ['help!', '???']
faq_commands = ['faq']
restart_commands = ['restart']

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text_interface/addstock.py Normal file
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from math import ceil
import sqlalchemy
from db import Product, User, Transaction
from text_interface.helpermenus import Menu
class AddStockMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Add stock and adjust credit', uses_db=True)
self.help_text = '''
Enter what you have bought for PVVVV here, along with your user name and how
much money you're due in credits for the purchase when prompted.\n'''
self.user = None
def _execute(self):
questions = {
(False, False): 'Enter user id or a string of the form "<number> <product>"',
(False, True): 'Enter user id or more strings of the form "<number> <product>"',
(True, False): 'Enter a string of the form "<number> <product>"',
(True, True): 'Enter more strings of the form "<number> <product>", or an empty line to confirm'
}
self.user = None
self.products = {}
self.price = 0
while True:
self.print_info()
self.printc(questions[bool(self.user), bool(len(self.products))])
thing_price = 0
# Read in a 'thing' (product or user):
line = self.input_multiple(add_nonexisting=('user', 'product'), empty_input_permitted=True,
find_hidden_products=False)
if line:
(thing, amount) = line
if isinstance(thing, Product):
self.printc("%d of %s registered" % (amount, thing.name))
thing_price = self.input_int('What did you pay a piece? ', (1, 100000),
default=thing.price) * amount
self.price += thing_price
# once we get something in the
# purchase, we want to protect the
# user from accidentally killing it
self.exit_confirm_msg = 'Abort transaction?'
else:
# thing = None
if not self.complete_input():
if self.confirm('Not enough information entered. Abort transaction?', default=True):
return False
continue
break
# Add the thing to the pending adjustments:
self.add_thing_to_pending(thing, amount, thing_price)
if self.confirm('Do you want to change the credited amount?', default=False):
self.price = self.input_int('Total amount> ', (1, 100000), default=self.price)
self.perform_transaction()
def complete_input(self):
return bool(self.user) and len(self.products) and self.price
def print_info(self):
print(6 + Product.name_length) * '-'
if self.price:
print("Amount to be credited: %" + str(Product.name_length - 17) + "i") % self.price
if self.user:
print("User to credit: %" + str(Product.name_length - 10) + "s") % self.user.name
print('\n%-' + str(Product.name_length - 1) + 's Amount') % "Product"
print(6 + Product.name_length) * '-'
if len(self.products):
# print "Products added:"
# print (6+Product.name_length)*'-'
for product in self.products.keys():
print('%' + str(-Product.name_length) + 's %5i') % (product.name, self.products[product][0])
print(6 + Product.name_length) * '-'
def add_thing_to_pending(self, thing, amount, price):
if isinstance(thing, User):
if self.user:
print "Only one user may be credited for a purchase, transfer credit manually afterwards"
return
else:
self.user = thing
elif thing in self.products.keys():
print 'Already added this product, adding amounts'
self.products[thing][0] += amount
self.products[thing][1] += price
else:
self.products[thing] = [amount, price]
def perform_transaction(self):
# self.user.credit += self.price
description = self.input_str('Log message> ', length_range=(0, 50))
if description == '':
description = 'Purchased products for PVVVV, adjusted credit ' + str(self.price)
transaction = Transaction(self.user, -self.price, description)
transaction.perform_transaction()
self.session.add(transaction)
for product in self.products:
value = max(product.stock, 0) * product.price + self.products[product][1]
old_price = product.price
old_hidden = product.hidden
product.price = int(ceil(float(value) / (max(product.stock, 0) + self.products[product][0])))
product.stock += self.products[product][0]
product.hidden = False
print "New stock for %s: %d" % (product.name, product.stock), \
("- New price: " + str(product.price) if old_price != product.price else ""), \
("- Removed hidden status" if old_hidden != product.hidden else "")
try:
self.session.commit()
print "Success! Transaction performed:"
# self.print_info()
print "User %s's credit is now %i" % (self.user.name, self.user.credit)
except sqlalchemy.exc.SQLAlchemyError, e:
print 'Could not perform transaction: %s' % e

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text_interface/buymenu.py Normal file
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import conf
import sqlalchemy
from db import User, Purchase, PurchaseEntry, Transaction, Product
from text_interface.helpermenus import Menu
class BuyMenu(Menu):
def __init__(self, session=None):
Menu.__init__(self, 'Buy', uses_db=True)
if session:
self.session = session
self.superfast_mode = False
self.help_text = '''
Each purchase may contain one or more products and one or more buyers.
Enter products (by name or bar code) and buyers (by name or bar code)
in any order. The information gathered so far is displayed after each
addition, and you can type 'what' at any time to redisplay it.
When finished, write an empty line to confirm the purchase.\n'''
@staticmethod
def credit_check(user):
"""
:param user:
:type user: User
:rtype: boolean
"""
assert isinstance(user, User)
return user.credit > conf.low_credit_warning_limit
def low_credit_warning(self, user, timeout=False):
assert isinstance(user, User)
print "***********************************************************************"
print "***********************************************************************"
print ""
print "$$\ $$\ $$$$$$\ $$$$$$$\ $$\ $$\ $$$$$$\ $$\ $$\ $$$$$$\\"
print "$$ | $\ $$ |$$ __$$\ $$ __$$\ $$$\ $$ |\_$$ _|$$$\ $$ |$$ __$$\\"
print "$$ |$$$\ $$ |$$ / $$ |$$ | $$ |$$$$\ $$ | $$ | $$$$\ $$ |$$ / \__|"
print "$$ $$ $$\$$ |$$$$$$$$ |$$$$$$$ |$$ $$\$$ | $$ | $$ $$\$$ |$$ |$$$$\\"
print "$$$$ _$$$$ |$$ __$$ |$$ __$$< $$ \$$$$ | $$ | $$ \$$$$ |$$ |\_$$ |"
print "$$$ / \$$$ |$$ | $$ |$$ | $$ |$$ |\$$$ | $$ | $$ |\$$$ |$$ | $$ |"
print "$$ / \$$ |$$ | $$ |$$ | $$ |$$ | \$$ |$$$$$$\ $$ | \$$ |\$$$$$$ |"
print "\__/ \__|\__| \__|\__| \__|\__| \__|\______|\__| \__| \______/"
print ""
print "***********************************************************************"
print "***********************************************************************"
print ""
print "USER %s HAS LOWER CREDIT THAN %d." % (user.name, conf.low_credit_warning_limit)
print "THIS PURCHASE WILL CHARGE YOUR CREDIT TWICE AS MUCH."
print "CONSIDER PUTTING MONEY IN THE BOX TO AVOID THIS."
print ""
print "Do you want to continue with this purchase?"
if timeout:
print"THIS PURCHASE WILL AUTOMATICALLY BE PERFORMED IN 3 MINUTES!"
return self.confirm(prompt=">", default=True, timeout=180)
else:
return self.confirm(prompt=">", default=True)
def add_thing_to_purchase(self, thing, amount=1):
if isinstance(thing, User):
if thing.is_anonymous():
print '--------------------------------------------'
print'You are now purchasing as the user anonym.'
print'You have to put money in the anonym-jar.'
print '--------------------------------------------'
if not self.credit_check(thing):
if self.low_credit_warning(user=thing, timeout=self.superfast_mode):
Transaction(thing, purchase=self.purchase, penalty=2)
else:
return False
else:
Transaction(thing, purchase=self.purchase)
elif isinstance(thing, Product):
PurchaseEntry(self.purchase, thing, amount)
return True
def _execute(self, initial_contents=None):
self.print_header()
self.purchase = Purchase()
self.exit_confirm_msg = None
self.superfast_mode = False
if initial_contents is None:
initial_contents = []
for thing, num in initial_contents:
self.add_thing_to_purchase(thing, num)
def is_product(candidate):
return isinstance(candidate, Product)
if len(initial_contents) > 0 and all(map(is_product, initial_contents)):
self.superfast_mode = True
print '***********************************************'
print '****** Buy menu is in SUPERFASTmode[tm]! ******'
print '*** The purchase will be stored immediately ***'
print '*** when you enter a user. ***'
print '***********************************************'
while True:
self.print_purchase()
self.printc({(False, False): 'Enter user or product identification',
(False, True): 'Enter user identification or more products',
(True, False): 'Enter product identification or more users',
(True, True): 'Enter more products or users, or an empty line to confirm'
}[(len(self.purchase.transactions) > 0,
len(self.purchase.entries) > 0)])
# Read in a 'thing' (product or user):
line = self.input_multiple(add_nonexisting=('user', 'product'), empty_input_permitted=True,
find_hidden_products=False)
thing, num = line
# Possibly exit from the menu:
if thing is None:
if not self.complete_input():
if self.confirm('Not enough information entered. Abort purchase?',
default=True):
return False
continue
break
else:
# once we get something in the
# purchase, we want to protect the
# user from accidentally killing it
self.exit_confirm_msg = 'Abort purchase?'
# Add the thing to our purchase object:
if not self.add_thing_to_purchase(thing, amount=num):
continue
# In super-fast mode, we complete the purchase once we get a user:
if self.superfast_mode and isinstance(thing, User):
break
self.purchase.perform_purchase()
self.session.add(self.purchase)
try:
self.session.commit()
except sqlalchemy.exc.SQLAlchemyError, e:
print 'Could not store purchase: %s' % e
else:
print 'Purchase stored.'
self.print_purchase()
for t in self.purchase.transactions:
if not t.user.is_anonymous():
print 'User %s\'s credit is now %d kr' % (t.user.name, t.user.credit)
if t.user.credit < conf.low_credit_warning_limit:
print 'USER %s HAS LOWER CREDIT THAN %d, AND SHOULD CONSIDER PUTTING SOME MONEY IN THE BOX.' \
% (t.user.name, conf.low_credit_warning_limit)
return True
def complete_input(self):
return self.purchase.is_complete()
def format_purchase(self):
self.purchase.set_price()
transactions = self.purchase.transactions
entries = self.purchase.entries
if len(transactions) == 0 and len(entries) == 0:
return None
string = 'Purchase:'
string += '\n buyers: '
if len(transactions) == 0:
string += '(empty)'
else:
string += ', '.join(
map(lambda t: t.user.name + ("*" if t.user.credit < conf.user_recent_transaction_limit else ""),
transactions))
string += '\n products: '
if len(entries) == 0:
string += '(empty)'
else:
string += "\n "
string += '\n '.join(map(lambda e: '%dx %s (%d kr)' % (e.amount, e.product.name, e.product.price),
entries))
if len(transactions) > 1:
string += '\n price per person: %d kr' % self.purchase.price_per_transaction()
if any(t.penalty > 1 for t in transactions):
string += ' *(%d kr)' % (self.purchase.price_per_transaction() * 2)
string += '\n total price: %d kr' % self.purchase.price
if any(t.penalty > 1 for t in transactions):
string += '\n *total with penalty: %d kr' % sum(
self.purchase.price_per_transaction() * t.penalty for t in transactions)
return string
def print_purchase(self):
info = self.format_purchase()
if info is not None:
self.set_context(info)

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text_interface/editing.py Normal file
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import sqlalchemy
from db import User, Product
from text_interface.helpermenus import Menu, Selector
__all__ = ["AddUserMenu", "AddProductMenu", "EditProductMenu", "AdjustStockMenu", "CleanupStockMenu", "EditUserMenu"]
class AddUserMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Add user', uses_db=True)
def _execute(self):
self.print_header()
username = self.input_str('Username (should be same as PVV username)> ', User.name_re, (1, 10))
cardnum = self.input_str('Card number (optional)> ', User.card_re, (0, 10))
cardnum = cardnum.lower()
rfid = self.input_str('RFID (optional)> ', User.rfid_re, (0, 10))
user = User(username, cardnum, rfid)
self.session.add(user)
try:
self.session.commit()
print 'User %s stored' % username
except sqlalchemy.exc.IntegrityError, e:
print 'Could not store user %s: %s' % (username, e)
self.pause()
class EditUserMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Edit user', uses_db=True)
self.help_text = '''
The only editable part of a user is its card number and rfid.
First select an existing user, then enter a new card number for that
user, then rfid (write an empty line to remove the card number or rfid).
'''
def _execute(self):
self.print_header()
user = self.input_user('User> ')
self.printc('Editing user %s' % user.name)
card_str = '"%s"' % user.card
if user.card is None:
card_str = 'empty'
user.card = self.input_str('Card number (currently %s)> ' % card_str,
User.card_re, (0, 10),
empty_string_is_none=True)
if user.card:
user.card = user.card.lower()
rfid_str = '"%s"' % user.rfid
if user.rfid is None:
rfid_str = 'empty'
user.rfid = self.input_str('RFID (currently %s)> ' % rfid_str,
User.rfid_re, (0, 10),
empty_string_is_none=True)
try:
self.session.commit()
print 'User %s stored' % user.name
except sqlalchemy.exc.SQLAlchemyError, e:
print 'Could not store user %s: %s' % (user.name, e)
self.pause()
class AddProductMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Add product', uses_db=True)
def _execute(self):
self.print_header()
bar_code = self.input_str('Bar code> ', Product.bar_code_re, (8, 13))
name = self.input_str('Name> ', Product.name_re, (1, Product.name_length))
price = self.input_int('Price> ', (1, 100000))
product = Product(bar_code, name, price)
self.session.add(product)
try:
self.session.commit()
print 'Product %s stored' % name
except sqlalchemy.exc.SQLAlchemyError, e:
print 'Could not store product %s: %s' % (name, e)
self.pause()
class EditProductMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Edit product', uses_db=True)
def _execute(self):
self.print_header()
product = self.input_product('Product> ')
self.printc('Editing product %s' % product.name)
while True:
selector = Selector('Do what with %s?' % product.name,
items=[('name', 'Edit name'),
('price', 'Edit price'),
('barcode', 'Edit barcode'),
('hidden', 'Edit hidden status'),
('store', 'Store')])
what = selector.execute()
if what == 'name':
product.name = self.input_str('Name[%s]> ' % product.name, Product.name_re, (1, product.name_length))
elif what == 'price':
product.price = self.input_int('Price[%s]> ' % product.price, (1, 100000))
elif what == 'barcode':
product.bar_code = self.input_str('Bar code[%s]> ' % product.bar_code, Product.bar_code_re, (8, 13))
elif what == 'hidden':
product.hidden = self.confirm('Hidden[%s]' % ("Y" if product.hidden else "N"), False)
elif what == 'store':
try:
self.session.commit()
print 'Product %s stored' % product.name
except sqlalchemy.exc.SQLAlchemyError, e:
print 'Could not store product %s: %s' % (product.name, e)
self.pause()
return
elif what is None:
print 'Edit aborted'
return
else:
print 'What what?'
class AdjustStockMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Adjust stock', uses_db=True)
def _execute(self):
self.print_header()
product = self.input_product('Product> ')
print 'The stock of this product is: %d ' % product.stock
print 'Write the number of products you have added to the stock'
print 'Alternatively, correct the stock for any mistakes'
add_stock = self.input_int('Added stock> ', (-1000, 1000))
print 'You added %d to the stock of %s' % (add_stock, product)
product.stock += add_stock
print 'The stock is now %d' % product.stock
try:
self.session.commit()
print 'Stock is now stored'
self.pause()
except sqlalchemy.exc.SQLAlchemyError, e:
print 'Could not store stock: %s' % e
self.pause()
return
print 'The stock is now %d' % product.stock
class CleanupStockMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Stock Cleanup', uses_db=True)
def _execute(self):
self.print_header()
products = self.session.query(Product).filter(Product.stock != 0).all()
print "Every product in stock will be printed."
print "Entering no value will keep current stock or set it to 0 if it is negative."
print "Entering a value will set current stock to that value."
print "Press enter to begin."
self.pause()
changed_products = []
for product in products:
oldstock = product.stock
product.stock = self.input_int(product.name, (0, 10000), default=max(0, oldstock))
self.session.add(product)
if oldstock != product.stock:
changed_products.append((product, oldstock))
try:
self.session.commit()
print 'New stocks are now stored.'
self.pause()
except sqlalchemy.exc.SQLAlchemyError, e:
print 'Could not store stock: %s' % e
self.pause()
return
for p in changed_products:
print p[0].name, ".", p[1], "->", p[0].stock

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# -*- coding: utf-8 -*-
from .helpermenus import MessageMenu, Menu
class FAQMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Frequently Asked Questions')
self.items = [MessageMenu('What is the meaning with this program?',
'''
We want to avoid keeping lots of cash in PVVVV\'s money box and to
make it easy to pay for stuff without using money. (Without using
money each time, that is. You do of course have to pay for the things
you buy eventually).
Dibbler stores a "credit" amount for each user. When you register a
purchase in Dibbler, this amount is decreased. To increase your
credit, add money to the money box and use "Adjust credit" to tell
Dibbler about it.
'''),
MessageMenu('Can I still pay for stuff using cash?',
'Yes. You can safely ignore this program completely.'),
MessageMenu('How do I exit from a submenu/dialog/thing?',
'Type "exit" or C-d.'),
MessageMenu('What does "." mean?',
'''
The "." character, known as "full stop" or "period", is most often
used to indicate the end of a sentence.
It is also used by Dibbler to indicate that the program wants you to
read some text before continuing. Whenever some output ends with a
line containing only a period, you should read the lines above and
then press enter to continue.
'''),
MessageMenu('Why is the user interface so terribly unintuitive?',
'''
Answer #1: It is not.
Answer #2: We are trying to compete with PVV\'s microwave oven in
userfriendliness.
Answer #3: YOU are unintuitive.
'''),
MessageMenu('Why is there no help command?',
'There is. Have you tried typing "help"?'),
MessageMenu('Where are the easter eggs? I tried saying "moo", but nothing happened.',
'Don\'t say "moo".'),
MessageMenu('Why does the program speak English when all the users are Norwegians?',
u'Godt spørsmål. Det virket sikkert som en god idé der og da.'),
MessageMenu('I found a bug; is there a reward?',
'''
No.
But if you are certain that it is a bug, not a feature, then you
should fix it (or better: force someone else to do it).
Follow this procedure:
1. Check out the Dibbler code from https://dev.pvv.ntnu.no/svn/dibbler
2. Fix the bug.
3. Check that the program still runs (and, preferably, that the bug is
in fact fixed).
4. Commit.
5. Update the running copy from svn:
$ su -
# su -l -s /bin/bash pvvvv
$ cd dibbler
$ svn up
6. Type "restart" in Dibbler to replace the running process by a new
one using the updated files.
'''),
MessageMenu('My question isn\'t listed here; what do I do?',
'''
DON\'T PANIC.
Follow this procedure:
1. Ask someone (or read the source code) and get an answer.
2. Check out the Dibbler code from https://dev.pvv.ntnu.no/svn/dibbler
3. Add your question (with answer) to the FAQ and commit.
4. Update the running copy from svn:
$ su -
# su -l -s /bin/bash pvvvv
$ cd dibbler
$ svn up
5. Type "restart" in Dibbler to replace the running process by a new
one using the updated files.
''')]

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# -*- 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, safe_str, 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.header_format = '[%s]'
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_format % self.name
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]
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 'Value must match regular expression "%s"' % 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 'Value must have length in range [%d,%d]' % length_range
elif length_range[0]:
print 'Value must have length at least %d' % length_range[0]
else:
print 'Value must have length at most %d' % length_range[1]
else:
return result
while True:
try:
# result = None
# It is replaced either way
if timeout:
# assuming line buffering
sys.stdout.write(safe_str(prompt))
sys.stdout.flush()
rlist, _, _ = select([sys.stdin], [], [], timeout)
if not rlist:
# timeout occurred, simulate empty line
result = ''
else:
result = unicode(raw_input(), conf.input_encoding).strip()
else:
result = unicode(raw_input(safe_str(prompt)), conf.input_encoding).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):
if prompt is None:
prompt = self.prompt
if default is not None:
prompt += ("[%s] " % default)
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 'Value must be in range [%d,%d]' % allowed_range
elif allowed_range[0]:
print 'Value must be at least %d' % allowed_range[0]
else:
print 'Value must be at most %d' % allowed_range[1]
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 '"%s" looks like a username, but no such user exists.' % string
if self.confirm('Create user %s?' % string):
user = User(string, None)
self.session.add(user)
return user
return None
if type_guess == 'card':
selector = Selector('"%s" looks like a card number, but no user with that card number exists.' % string,
[('create', 'Create user with card number %s' % string),
('set', 'Set card number of an existing user to %s' % 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 'Card number of %s set to %s (was %s)' % (user.name, string, 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 'No %ss matching "%s"' % (thing, search_str)
return None
if len(result) == 1:
msg = 'One %s matching "%s": %s. Use this?' % \
(thing, search_str, unicode(result[0]))
if self.confirm(msg, default=True):
return result[0]
return None
limit = 9
if len(result) > limit:
select_header = '%d %ss matching "%s"; showing first %d' % \
(len(result), thing, search_str, limit)
select_items = result[:limit]
else:
select_header = '%d %ss matching "%s"' % \
(len(result), thing, search_str)
select_items = result
selector = Selector(select_header, items=select_items,
return_index=False)
return selector.execute()
def confirm(self, prompt, default=None, timeout=None):
return ConfirmMenu(prompt, default, timeout).execute()
def print_header(self):
print ""
print self.header_format % self.name
def pause(self):
self.input_str('.')
def general_help(self):
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 'Help for %s:' % (self.header_format % self.name)
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):
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('%s (%s) ' % (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)
self.header_format = '%s'
def print_header(self):
print self.header_format % self.name
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 'Help for selector (%s):' % self.name
print self.help_text

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# -*- coding: utf-8 -*-
import os
import sys
from db import Session
from text_interface import faq_commands, restart_commands
from text_interface.buymenu import BuyMenu
from text_interface.faq import FAQMenu
from text_interface.helpermenus import Menu
def restart():
# Does not work if the script is not executable, or if it was
# started by searching $PATH.
os.execv(sys.argv[0], sys.argv)
class MainMenu(Menu):
def special_input_choice(self, in_str):
mv = in_str.split()
if len(mv) == 2 and mv[0].isdigit():
num = int(mv[0])
item_name = mv[1]
else:
num = 1
item_name = in_str
buy_menu = BuyMenu(Session())
thing = buy_menu.search_for_thing(item_name, find_hidden_products=False)
if thing:
buy_menu.execute(initial_contents=[(thing, num)])
self.show_context()
return True
return False
def special_input_options(self, result):
if result in faq_commands:
FAQMenu().execute()
return True
if result in restart_commands:
if self.confirm('Restart Dibbler?'):
restart()
pass
return True
return False
def invalid_menu_choice(self, in_str):
print self.show_context()

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import conf
import sqlalchemy
from db import Transaction, Product, User
from helpers import less
from text_interface.helpermenus import Menu, Selector
class TransferMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Transfer credit between users',
uses_db=True)
def _execute(self):
self.print_header()
amount = self.input_int('Transfer amount> ', (1, 100000))
self.set_context('Transfering %d kr' % amount, display=False)
user1 = self.input_user('From user> ')
self.add_to_context(' from ' + user1.name)
user2 = self.input_user('To user> ')
self.add_to_context(' to ' + user2.name)
t1 = Transaction(user1, amount,
'transfer to ' + user2.name)
t2 = Transaction(user2, -amount,
'transfer from ' + user1.name)
t1.perform_transaction()
t2.perform_transaction()
self.session.add(t1)
self.session.add(t2)
try:
self.session.commit()
print 'Transfered %d kr from %s to %s' % (amount, user1, user2)
print 'User %s\'s credit is now %d kr' % (user1, user1.credit)
print 'User %s\'s credit is now %d kr' % (user2, user2.credit)
except sqlalchemy.exc.SQLAlchemyError, e:
print 'Could not perform transfer: %s' % e
# self.pause()
class ShowUserMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Show user', uses_db=True)
def _execute(self):
self.print_header()
user = self.input_user('User name, card number or RFID> ')
print 'User name: %s' % user.name
print 'Card number: %s' % user.card
print 'RFID: %s' % user.rfid
print 'Credit: %s kr' % user.credit
selector = Selector('What do you want to know about %s?' % user.name,
items=[('transactions', 'Recent transactions (List of last ' + str(
conf.user_recent_transaction_limit) + ')'),
('products', 'Which products %s has bought, and how many' % user.name),
('transactions-all', 'Everything (List of all transactions)')])
what = selector.execute()
if what == 'transactions':
self.print_transactions(user, conf.user_recent_transaction_limit)
elif what == 'products':
self.print_purchased_products(user)
elif what == 'transactions-all':
self.print_all_transactions(user)
else:
print 'What what?'
@staticmethod
def print_all_transactions(user):
num_trans = len(user.transactions)
string = '%s\'s transactions (%d):\n' % (user.name, num_trans)
for t in user.transactions[::-1]:
string += ' * %s: %s %d kr, ' % \
(t.time.strftime('%Y-%m-%d %H:%M'),
{True: 'in', False: 'out'}[t.amount < 0],
abs(t.amount))
if t.purchase:
string += 'purchase ('
string += ', '.join(map(lambda e: e.product.name,
t.purchase.entries))
string += ')'
if t.penalty > 1:
string += ' * %dx penalty applied' % t.penalty
else:
string += t.description
string += '\n'
less(string)
@staticmethod
def print_transactions(user, limit=10):
num_trans = len(user.transactions)
if num_trans <= limit:
string = '%s\'s transactions (%d):\n' % (user.name, num_trans)
else:
string = '%s\'s transactions (%d, showing only last %d):\n' % (user.name, num_trans, limit)
for t in user.transactions[-1:-limit - 1:-1]:
string += ' * %s: %s %d kr, ' % \
(t.time.strftime('%Y-%m-%d %H:%M'),
{True: 'in', False: 'out'}[t.amount < 0],
abs(t.amount))
if t.purchase:
string += 'purchase ('
string += ', '.join(map(lambda e: e.product.name,
t.purchase.entries))
string += ')'
if t.penalty > 1:
string += ' * %dx penalty applied' % t.penalty
else:
string += t.description
string += '\n'
less(string)
@staticmethod
def print_purchased_products(user):
products = []
for ref in user.products:
product = ref.product
count = ref.count
products.append((product, count))
num_products = len(products)
if num_products == 0:
print 'No products purchased yet'
else:
text = ''
text += 'Products purchased:\n'
for product, count in products:
text += u'{0:<47} {1:>3}\n'.format(product.name, count)
less(text)
class UserListMenu(Menu):
def __init__(self):
Menu.__init__(self, 'User list', uses_db=True)
def _execute(self):
self.print_header()
user_list = self.session.query(User).all()
total_credit = self.session.query(sqlalchemy.func.sum(User.credit)).first()[0]
line_format = '%-12s | %6s\n'
hline = '---------------------\n'
text = ''
text += line_format % ('username', 'credit')
text += hline
for user in user_list:
text += line_format % (user.name, user.credit)
text += hline
text += line_format % ('total credit', total_credit)
less(text)
class AdjustCreditMenu(Menu): # reimplements ChargeMenu; these should be combined to one
def __init__(self):
Menu.__init__(self, 'Adjust credit', uses_db=True)
def _execute(self):
self.print_header()
user = self.input_user('User> ')
print 'User %s\'s credit is %d kr' % (user.name, user.credit)
self.set_context('Adjusting credit for user %s' % user.name, display=False)
print '(Note on sign convention: Enter a positive amount here if you have'
print 'added money to the PVVVV money box, a negative amount if you have'
print 'taken money from it)'
amount = self.input_int('Add amount> ', (-100000, 100000))
print '(The "log message" will show up in the transaction history in the'
print '"Show user" menu. It is not necessary to enter a message, but it'
print 'might be useful to help you remember why you adjusted the credit)'
description = self.input_str('Log message> ', length_range=(0, 50))
if description == '':
description = 'manually adjusted credit'
transaction = Transaction(user, -amount, description)
transaction.perform_transaction()
self.session.add(transaction)
try:
self.session.commit()
print 'User %s\'s credit is now %d kr' % (user.name, user.credit)
except sqlalchemy.exc.SQLAlchemyError, e:
print 'Could not store transaction: %s' % e
# self.pause()
class ProductListMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Product list', uses_db=True)
def _execute(self):
self.print_header()
text = ''
product_list = self.session.query(Product).filter(Product.hidden.is_(False)).order_by(Product.stock.desc())
total_value = 0
for p in product_list:
total_value += p.price * p.stock
line_format = '%-15s | %5s | %-' + str(Product.name_length) + 's | %5s \n'
text += line_format % ('bar code', 'price', 'name', 'stock')
text += 78 * '-' + '\n'
for p in product_list:
text += line_format % (p.bar_code, p.price, p.name, p.stock)
text += 78 * '-' + '\n'
text += line_format % ('Total value', total_value, '', '',)
less(text)
class ProductSearchMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Product search', uses_db=True)
def _execute(self):
self.print_header()
self.set_context('Enter (part of) product name or bar code')
product = self.input_product()
print 'Result: %s, price: %d kr, bar code: %s, stock: %d, hidden: %s' % (product.name, product.price,
product.bar_code, product.stock,
("Y" if product.hidden else "N"))
# self.pause()

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import sqlalchemy
from db import PurchaseEntry, Product, User
from helpers import less
from sqlalchemy import desc
from sqlalchemy import func
from statistikkHelpers import statisticsTextOnly
from text_interface.helpermenus import Menu
__all__ = ["ProductPopularityMenu", "ProductRevenueMenu", "BalanceMenu", "LoggedStatisticsMenu"]
class ProductPopularityMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Products by popularity', uses_db=True)
def _execute(self):
self.print_header()
text = ''
sub = \
self.session.query(PurchaseEntry.product_id,
func.count('*').label('purchase_count')) \
.group_by(PurchaseEntry.product_id) \
.subquery()
product_list = \
self.session.query(Product, sub.c.purchase_count) \
.outerjoin((sub, Product.product_id == sub.c.product_id)) \
.order_by(desc(sub.c.purchase_count)) \
.filter(sub.c.purchase_count is not None) \
.all()
line_format = '%10s | %-' + str(Product.name_length) + 's\n'
text += line_format % ('items sold', 'product')
text += '-' * 58 + '\n'
for product, number in product_list:
text += line_format % (number, product.name)
less(text)
class ProductRevenueMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Products by revenue', uses_db=True)
def _execute(self):
self.print_header()
text = ''
sub = \
self.session.query(PurchaseEntry.product_id,
func.count('*').label('purchase_count')) \
.group_by(PurchaseEntry.product_id) \
.subquery()
product_list = \
self.session.query(Product, sub.c.purchase_count) \
.outerjoin((sub, Product.product_id == sub.c.product_id)) \
.order_by(desc(sub.c.purchase_count * Product.price)) \
.filter(sub.c.purchase_count is not None) \
.all()
line_format = '%7s | %10s | %5s | %-' + str(Product.name_length) + 's\n'
text += line_format % ('revenue', 'items sold', 'price', 'product')
text += '-' * (31 + Product.name_length) + '\n'
for product, number in product_list:
text += line_format % (number * product.price, number, product.price, product.name)
less(text)
class BalanceMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Total balance of PVVVV', uses_db=True)
def _execute(self):
self.print_header()
text = ''
total_value = 0
product_list = self.session.query(Product).all()
for p in product_list:
total_value += p.stock * p.price
total_credit = self.session.query(sqlalchemy.func.sum(User.credit)).first()[0]
total_balance = total_value - total_credit
line_format = '%15s | %5d \n'
text += line_format % ('Total value', total_value)
text += 24 * '-' + '\n'
text += line_format % ('Total credit', total_credit)
text += 24 * '-' + '\n'
text += line_format % ('Total balance', total_balance)
less(text)
class LoggedStatisticsMenu(Menu):
def __init__(self):
Menu.__init__(self, 'Statistics from log', uses_db=True)
def _execute(self):
statisticsTextOnly()