price.py

   1 # -*- coding: utf-8 -*-
   2 ############################################################
   3 # Copyright © 2009 Benoît PIN <pinbe@luxia.fr>             #
   4 # Cliché - http://luxia.fr                                 #
   5 #                                                          #
   6 # This program is free software; you can redistribute it   #
   7 # and/or modify it under the terms of the Creative Commons #
   8 # "Attribution-Noncommercial 2.0 Generic"                  #
   9 # http://creativecommons.org/licenses/by-nc/2.0/           #
  10 ############################################################
  11 """
  12 Pricing types
  13
  14
  15
  16 """
  17
  18 from Globals import Persistent
  19 from AccessControl import ModuleSecurityInfo
  20 from utils import Message as _
  21 from utils import translate
  22 from zope.globalrequest import getRequest
  23
  24 msecurity = ModuleSecurityInfo('Products.photoprint.price')
  25 msecurity.declarePublic('Price')
  26
  27 class Price(object, Persistent) :
  28         """
  29         Price of an object which have VAT tax.
  30         """
  31         __allow_access_to_unprotected_subobjects__ = 1
  32
  33         def __init__(self, taxedPrice, rate=0) :
  34                 """price is initialized with taxed value"""
  35                 self._rate = float(rate)
  36                 self._setTaxed(taxedPrice)
  37
  38         @property
  39         def rate(self):
  40                 return self._localeStrNum(self._rate)
  41
  42         def _setTaxed(self, value) :
  43                 self._taxed = value
  44                 self._price = value / (1 + self._rate)
  45
  46         @property
  47         def taxed(self) :
  48                 return self._localeStrNum(self._taxed)
  49
  50         @property
  51         def value(self) :
  52                 return self._localeStrNum(self._price)
  53
  54         @property
  55         def tax(self) :
  56                 tax = self._rate * self._price
  57                 return self._localeStrNum(tax)
  58
  59         @property
  60         def vat(self) :
  61                 "returns vat rate in percent"
  62                 vat = self._rate * 100
  63                 return self._localeStrNum(vat)
  64
  65         def _localeStrNum(self, n) :
  66                 i = int(n)
  67                 if i == n :
  68                         return str(i)
  69                 else :
  70                         n = str(round(n, 2))
  71                         i, d = n.split('.')
  72                         ds = _(u'${i}.${d}', mapping={'i':i, 'd':d}, default=n)
  73                         return  translate(ds).encode('utf-8')
  74
  75         def getValues(self) :
  76                 values = {'value':self._price,
  77                                   'taxed': self._taxed,
  78                                   'rate':self._rate}
  79                 return values
  80
  81
  82         def __add__(self, other) :
  83                 taxed = self._taxed + other._taxed
  84                 value = self._price + other._price
  85                 rate = (taxed - value ) / float(value)
  86                 return Price(taxed, rate)
  87
  88         def __div__(self, other) :
  89                 return Price(self._taxed / other, self._rate)
  90
  91         def __mul__(self, other) :
  92                 return Price(self._taxed * other, self._rate)
  93
  94         def __repr__(self):
  95                 return '%s with VAT' % self.taxed