[IMP] product: factorize contextual price

This commit factorizes contextual price in order to ease further
inheritance.

task-2382027

addons/product/models/product_product.py

@@ -704,12 +704,4 @@ class ProductProduct(models.Model):
 
     def _get_contextual_price(self):
         self.ensure_one()
-        # YTI TODO: During website_sale cleaning, we should get rid of those crappy context thing
-        pricelist = self.product_tmpl_id._get_contextual_pricelist()
-        if not pricelist:
-            return 0.0
-
-        quantity = self.env.context.get('quantity', 1.0)
-        uom = self.env['uom.uom'].browse(self.env.context.get('uom'))
-        date = self.env.context.get('date')
-        return pricelist._get_product_price(self, quantity, uom=uom, date=date)
+        return self.product_tmpl_id._get_contextual_price(self)

addons/product/models/product_template.py

@@ -1273,7 +1273,7 @@ class ProductTemplate(models.Model):
             'template': '/product/static/xls/product_template.xls'
         }]
 
-    def _get_contextual_price(self):
+    def _get_contextual_price(self, product=None):
         self.ensure_one()
         # YTI TODO: During website_sale cleaning, we should get rid of those crappy context thing
         pricelist = self._get_contextual_pricelist()
@@ -1283,7 +1283,7 @@ class ProductTemplate(models.Model):
         quantity = self.env.context.get('quantity', 1.0)
         uom = self.env['uom.uom'].browse(self.env.context.get('uom'))
         date = self.env.context.get('date')
-        return pricelist._get_product_price(self, quantity, uom=uom, date=date)
+        return pricelist._get_product_price(product or self, quantity, uom=uom, date=date)
 
     def _get_contextual_pricelist(self):
         """ Get the contextual pricelist