price.py

   1 # -*- coding: utf-8 -*-
   2 #######################################################################################
   3 # Copyright © 2009 Benoît Pin <pin@cri.ensmp.fr>                                      #
   4 # Plinn - http://plinn.org                                                            #
   5 #                                                                                     #
   6 #                                                                                     #
   7 #   This program is free software; you can redistribute it and/or                     #
   8 #   modify it under the terms of the GNU General Public License                       #
   9 #   as published by the Free Software Foundation; either version 2                    #
  10 #   of the License, or (at your option) any later version.                            #
  11 #                                                                                     #
  12 #   This program is distributed in the hope that it will be useful,                   #
  13 #   but WITHOUT ANY WARRANTY; without even the implied warranty of                    #
  14 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                     #
  15 #   GNU General Public License for more details.                                      #
  16 #                                                                                     #
  17 #   You should have received a copy of the GNU General Public License                 #
  18 #   along with this program; if not, write to the Free Software                       #
  19 #   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.   #
  20 #######################################################################################
  21 """
  22 Pricing types
  23
  24
  25
  26 """
  27
  28 from Globals import Persistent
  29 from AccessControl import ModuleSecurityInfo
  30 from utils import Message as _
  31 from utils import translate
  32 from zope.globalrequest import getRequest
  33
  34 msecurity = ModuleSecurityInfo('Products.photoprint.price')
  35 msecurity.declarePublic('Price')
  36
  37 class Price(object, Persistent) :
  38         """
  39         Price of an object which have VAT tax.
  40         """
  41         __allow_access_to_unprotected_subobjects__ = 1
  42
  43         def __init__(self, taxedPrice, rate=0) :
  44                 """price is initialized with taxed value"""
  45                 self._rate = float(rate)
  46                 self._setTaxed(taxedPrice)
  47
  48         @property
  49         def rate(self):
  50                 return self._localeStrNum(self._rate)
  51
  52         def _setTaxed(self, value) :
  53                 self._taxed = value
  54                 self._price = value / (1 + self._rate)
  55
  56         @property
  57         def taxed(self) :
  58                 return self._localeStrNum(self._taxed)
  59
  60         @property
  61         def value(self) :
  62                 return self._localeStrNum(self._price)
  63
  64         @property
  65         def tax(self) :
  66                 tax = self._rate * self._price
  67                 return self._localeStrNum(tax)
  68
  69         @property
  70         def vat(self) :
  71                 "returns vat rate in percent"
  72                 vat = self._rate * 100
  73                 return self._localeStrNum(vat)
  74
  75         def _localeStrNum(self, n) :
  76                 i = int(n)
  77                 if i == n :
  78                         return str(i)
  79                 else :
  80                         n = str(round(n, 2))
  81                         i, d = n.split('.')
  82                         ds = _(u'${i}.${d}', mapping={'i':i, 'd':d}, default=n)
  83                         return  translate(ds).encode('utf-8')
  84
  85         def getValues(self) :
  86                 values = {'value':self._price,
  87                                   'taxed': self._taxed,
  88                                   'rate':self._rate}
  89                 return values
  90
  91
  92         def __add__(self, other) :
  93                 taxed = self._taxed + other._taxed
  94                 value = self._price + other._price
  95                 rate = (taxed - value ) / float(value)
  96                 return Price(taxed, rate)
  97
  98         def __div__(self, other) :
  99                 return Price(self._taxed / other, self._rate)
 100
 101         def __mul__(self, other) :
 102                 return Price(self._taxed * other, self._rate)
 103
 104         def __repr__(self):
 105                 return '%s with VAT' % self.taxed