se adiciona extensions para la dian

FossilOrigin-Name: f5521ddbfb903915de88a26ba5197b67efa1ebfd66337061ee9e3653c59dd217

facho/fe/model/common.py

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+import facho.model as model
+import facho.model.fields as fields
+
+from datetime import date, datetime
+
+__all__ = ['Element', 'Name', 'Date', 'Time', 'Period', 'ID']
+
+class Element(model.Model):
+    """
+    Lo usuamos para elementos que solo manejan contenido
+    """
+    __name__ = 'Element'
+    
+class Name(model.Model):
+    __name__ = 'Name'
+
+class Date(model.Model):
+    __name__ = 'Date'
+
+    def __default_set__(self, value):
+        if isinstance(value, str):
+            return value
+        if isinstance(value, date):
+            return value.isoformat()
+
+    def __str__(self):
+        return str(self._value)
+
+class Time(model.Model):
+    __name__ = 'Time'
+
+    def __default_set__(self, value):
+        if isinstance(value, str):
+            return value
+        if isinstance(value, date):
+            return value.strftime('%H:%M:%S-05:00')
+
+    def __str__(self):
+        return str(self._value)
+
+class Period(model.Model):
+    __name__ = 'Period'
+
+    start_date = fields.Many2One(Date, name='StartDate', namespace='cbc')
+
+    end_date = fields.Many2One(Date, name='EndDate', namespace='cbc')
+
+class ID(model.Model):
+    __name__ = 'ID'
+
+    def __default_get__(self, name, value):
+        return self._value
+
+    def __str__(self):
+        return str(self._value)