issue #124 Add afip_code to currency model. Add method get_afip_rate …

…to Rate model.

Teniamos hard-coded los códigos de las monedas de AFIP.
Se agrega el campo afip_code al modelo currency y se cargan algunos
valores vía xml (PES, DOL, Libra esterlina, Peso Uruguay, Real).

Se agrega metodo de consulta de cotización en el modelo Rate. Por ahora
no se hace uso de este método.

Tener en cuenta que la devolución de las cotizaciones son siempre de la forma:
 1 monda extranjera -> XX.XX peso argentino

Si la moneda fuerte es el peso argentino, entonces las cotizaciones en
las monedas extranjeras debería den ser:

 1 peso argentino -> xx.xx moneda extranjera.

REL:
 issue #172

TODO:
 Faltaría agregar al resto de las monedas.
 Consultar cotizacion de la moneda al hacer nota de crédito.

__init__.py

@@ -8,6 +8,7 @@
 from . import pos
 from . import bank
 from . import party
+from . import currency
 
 __all__ = ['register']
 
@@ -23,6 +24,7 @@ def register():
         invoice.AfipWSTransaction,
         bank.BankAccount,
         party.Party,
+        currency.Currency,
         module='account_invoice_ar', type_='model')
     Pool.register(
         invoice.CreditInvoice,

currency.py

@@ -0,0 +1,76 @@
+# The COPYRIGHT file at the top level of this repository contains
+# the full copyright notices and license terms.
+import datetime
+from pyafipws.wsfev1 import WSFEv1
+from pyafipws.wsfexv1 import WSFEXv1
+from . import afip_auth
+
+from trytond.model import fields
+from trytond.pyson import Eval, If, In
+from trytond.pool import PoolMeta
+
+__all__ = ['Currency', 'Rate']
+
+
+class Currency(metaclass=PoolMeta):
+    __name__ = 'currency.currency'
+    afip_code = fields.Char('AFIP Code', size=3,
+        help="The 3 digits AFIP currency code.")
+
+
+class Rate(metaclass=PoolMeta):
+    __name__ = 'currency.currency.rate'
+
+    def get_afip_rate(self, service='wsfex'):
+        '''
+        get rate from afip webservice.
+        '''
+        pool = Pool()
+        Company = pool.get('company.company')
+        company_id = Transaction().context.get('company')
+        if not company_id:
+            logger.error('The company is not defined')
+            cls.raise_user_error('company_not_defined')
+        company = Company(company_id)
+        # authenticate against AFIP:
+        auth_data = company.pyafipws_authenticate(service=service)
+
+        if service == 'wsfe':
+            ws = WSFEv1()
+            if company.pyafipws_mode_cert == 'homologacion':
+                WSDL = 'https://wswhomo.afip.gov.ar/wsfev1/service.asmx?WSDL'
+            elif company.pyafipws_mode_cert == 'produccion':
+                WSDL = (
+                    'https://servicios1.afip.gov.ar/wsfev1/service.asmx?WSDL')
+        elif service == 'wsfex':
+            ws = WSFEXv1()
+            if company.pyafipws_mode_cert == 'homologacion':
+                WSDL = 'https://wswhomo.afip.gov.ar/wsfexv1/service.asmx?WSDL'
+            elif company.pyafipws_mode_cert == 'produccion':
+                WSDL = (
+                    'https://servicios1.afip.gov.ar/wsfexv1/service.asmx?WSDL')
+        else:
+            logger.critical('AFIP ws is not yet supported! %s', service)
+            cls.raise_user_error('webservice_not_supported', service)
+
+        cache_dir = afip_auth.get_cache_dir()
+        ws.LanzarExcepciones = True
+        try:
+            ws.Conectar(wsdl=wsdl, cache=cache_dir)
+        except Exception as e:
+            msg = ws.Excepcion + ' ' + str(e)
+            logger.error('WSAA connecting to afip: %s' % msg)
+            cls.raise_user_error('wsaa_error', msg)
+        ws.Cuit = vat_number
+        ws.Token = auth_data['token']
+        ws.Sign = auth_data['sign']
+
+        if not date:
+            Date = pool.get('ir.date')
+            today = Date.today().strftime("%Y%m%d")
+        if not self.currency.afip_code:
+            logger.error('AFIP code is empty %s', self.currency.code)
+            cls.raise_user_error('afip_code_empty')
+
+        self.rate = Decimal(ws.GetParamCtz('DOL'))
+        self.date = datetime.datetime.strptime(ws.FchCotiz, '%Y%m%d').date()

currency.xml

@@ -2,10 +2,36 @@
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
 <tryton>
+    <data>
+
+        <record model="ir.ui.view" id="currency_view_form">
+            <field name="model">currency.currency</field>
+            <field name="inherit" ref="currency.currency_view_form"/>
+            <field name="name">currency_form</field>
+        </record>
+
+    </data>
+
     <data skiptest="1" grouped="1">
 
         <record model="currency.currency" id="currency.usd">
             <field name="symbol">U$S</field>
+            <field name="afip_code">DOL</field>
+        </record>
+        <record model="currency.currency" id="currency.ars">
+            <field name="afip_code">PES</field>
+        </record>
+        <record model="currency.currency" id="currency.eur">
+            <field name="afip_code">060</field>
+        </record>
+        <record model="currency.currency" id="currency.gbp">
+            <field name="afip_code">021</field>
+        </record>
+        <record model="currency.currency" id="currency.brl">
+            <field name="afip_code">012</field>
+        </record>
+        <record model="currency.currency" id="currency.uyu">
+            <field name="afip_code">011</field>
         </record>
     </data>
 

invoice.py

@@ -1329,11 +1329,14 @@ def strip_accents(text):
         else:
             ctz = self.company.currency.rate / self.currency.rate
 
-        if self.currency.code == 'ARS':
-            moneda_id = 'PES'
-        else:
-            moneda_id = {'USD': 'DOL', 'EUR': '060'}[self.currency.code]
+        if not self.currency.afip_code:
+            if batch:
+                logger.error('missing_currency_afip_code: Invoice: %s, '
+                    'currency afip code is not setted.' % self.id)
+                return (ws, True)
+            self.raise_user_error('missing_currency_afip_code')
 
+        moneda_id = self.currency.afip_code
         moneda_ctz = "{:.{}f}".format(ctz, 6)
 
         # foreign trade data: export permit, country code, etc.:

view/currency_form.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<!-- The COPYRIGHT file at the top level of this repository contains
+     the full copyright notices and license terms. -->
+<data>
+    <xpath expr="/form/field[@name='numeric_code']" position="after">
+        <label name="afip_code"/>
+        <field name="afip_code"/>
+    </xpath>
+</data>