[IMP] product_configurator: Price for custom values with formula

product_configurator/models/product_attribute.py

@@ -2,6 +2,7 @@
 
 from odoo import _, api, fields, models
 from odoo.exceptions import ValidationError
+from odoo.tools.safe_eval import test_python_expr
 
 
 class ProductAttribute(models.Model):
@@ -83,6 +84,34 @@ def onchange_val_custom_field(self):
     )
     uom_id = fields.Many2one(comodel_name="uom.uom", string="Unit of Measure")
     image = fields.Binary()
+    configurator_extra_price_formula = fields.Text(
+        string="Extra price formula",
+        help="Formula evaluated when computing "
+        "the extra price "
+        "for the custom value of this attribute.\n"
+        "The following variables are available:\n"
+        "- attribute: this attribute,\n"
+        "- config_session: the configuration session that configured the product,\n"
+        "- custom_value: the value provided by the user,\n"
+        "- product: the configured product,\n"
+        "The computed price "
+        "must be assigned to the `price` variable.",
+    )
+
+    @api.constrains(
+        "configurator_extra_price_formula",
+    )
+    def _constrain_configurator_extra_price_formula(self):
+        """Check syntax of added formula for 'exec' evaluation."""
+        for attribute in self:
+            price_formula = attribute.configurator_extra_price_formula
+            if price_formula:
+                error_message = test_python_expr(
+                    expr=price_formula,
+                    mode="exec",
+                )
+                if error_message:
+                    raise ValidationError(error_message)
 
     # TODO prevent the same attribute from being defined twice on the
     # attribute lines

product_configurator/models/product_config.py

@@ -1,9 +1,9 @@
 import logging
-from ast import literal_eval
 
 from odoo import _, api, fields, models
 from odoo.exceptions import UserError, ValidationError
 from odoo.tools.misc import flatten, formatLang
+from odoo.tools.safe_eval import safe_eval
 
 _logger = logging.getLogger(__name__)
 
@@ -332,6 +332,7 @@ class ProductConfigSession(models.Model):
 
     @api.depends(
         "value_ids",
+        "custom_value_ids.price",
         "product_tmpl_id.list_price",
         "product_tmpl_id.attribute_line_ids",
         "product_tmpl_id.attribute_line_ids.value_ids",
@@ -358,12 +359,7 @@ def _get_custom_vals_dict(self):
         {attribute_id: parsed_custom_value}"""
         custom_vals = {}
         for val in self.custom_value_ids:
-            if val.attribute_id.custom_type in ["float", "integer"]:
-                custom_vals[val.attribute_id.id] = literal_eval(val.value)
-            elif val.attribute_id.custom_type == "binary":
-                custom_vals[val.attribute_id.id] = val.attachment_ids
-            else:
-                custom_vals[val.attribute_id.id] = val.value
+            custom_vals[val.attribute_id.id] = val.eval()
         return custom_vals
 
     def _compute_config_step_name(self):
@@ -403,7 +399,7 @@ def get_cfg_weight(self, value_ids=None, custom_vals=None):
             value_ids = self.value_ids.ids
 
         if custom_vals is None:
-            custom_vals = {}
+            custom_vals = self._get_custom_vals_dict()
 
         product_tmpl = self.product_tmpl_id
 
@@ -827,20 +823,26 @@ def get_cfg_price(self, value_ids=None, custom_vals=None):
             value_ids = self.value_ids.ids
 
         if custom_vals is None:
-            custom_vals = {}
+            custom_vals = self._get_custom_vals_dict()
+
+        session_custom_values = self.custom_value_ids.filtered(
+            lambda cv: cv.attribute_id.id in custom_vals.keys()
+        )
+        custom_prices = session_custom_values.mapped("price")
+
+        price_extra = sum(custom_prices)
 
         product_tmpl = self.product_tmpl_id
         self = self.with_context(active_id=product_tmpl.id)
 
         value_ids = self.flatten_val_ids(value_ids)
 
-        price_extra = 0.0
         attr_val_obj = self.env["product.attribute.value"]
         av_ids = attr_val_obj.browse(value_ids)
         extra_prices = attr_val_obj.get_attribute_value_extra_prices(
             product_tmpl_id=product_tmpl.id, pt_attr_value_ids=av_ids
         )
-        price_extra = sum(extra_prices.values())
+        price_extra += sum(extra_prices.values())
         return product_tmpl.list_price + price_extra
 
     def _get_config_image(self, value_ids=None, custom_vals=None, size=None):
@@ -1608,6 +1610,43 @@ def _compute_val_name(self):
         column2="attachment_id",
         string="Attachments",
     )
+    price = fields.Float(
+        compute="_compute_price",
+        help="Price computed using attribute's 'Extra price formula'.",
+    )
+
+    def _eval_price_formula_variables_dict(self):
+        """Variables described in `product.attribute.configurator_extra_price_formula`."""
+        self.ensure_one()
+        return {
+            "attribute": self.attribute_id,
+            "config_session": self.cfg_session_id,
+            "custom_value": self.eval(),
+            "product": self.cfg_session_id.product_id,
+        }
+
+    def _eval_price_formula(self):
+        self.ensure_one()
+        price_formula = self.attribute_id.configurator_extra_price_formula
+        if price_formula:
+            variables_dict = self._eval_price_formula_variables_dict()
+            safe_eval(
+                price_formula,
+                globals_dict=variables_dict,
+                mode="exec",
+                nocopy=True,
+            )
+            price = variables_dict.get("price", 0)
+        else:
+            price = 0
+        return price
+
+    @api.depends(
+        "value",
+    )
+    def _compute_price(self):
+        for custom_value in self:
+            custom_value.price = custom_value._eval_price_formula()
 
     def eval(self):
         """Return custom value evaluated using the related custom field type"""

product_configurator/tests/__init__.py

@@ -7,3 +7,4 @@
 # from . import test_product_attribute
 # from . import test_product_config
 # from . import test_wizard
+from . import test_custom_attribute_price

product_configurator/tests/test_custom_attribute_price.py

@@ -0,0 +1,112 @@
+#  Copyright 2024 Simone Rubino - Aion Tech
+#  License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo.fields import first
+from odoo.tests import Form, TransactionCase
+from odoo.tools.safe_eval import safe_eval
+
+
+class TestCustomAttributePrice(TransactionCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        # The product attribute view only shows configuration fields
+        # (such as `val_custom`)
+        # when called with a specific context
+        # that is set by this action
+        configuration_attributes_action = cls.env.ref(
+            "product_configurator.action_attributes_view"
+        )
+        action_eval_context = configuration_attributes_action._get_eval_context()
+        configuration_attribute_context = safe_eval(
+            configuration_attributes_action.context, globals_dict=action_eval_context
+        )
+        configuration_attribute_model = cls.env["product.attribute"].with_context(
+            **configuration_attribute_context
+        )
+
+        custom_attribute_form = Form(configuration_attribute_model)
+        custom_attribute_form.name = "Test custom attribute"
+        custom_attribute_form.val_custom = True
+        cls.custom_attribute = custom_attribute_form.save()
+        cls.custom_attribute_value = cls.env.ref(
+            "product_configurator.custom_attribute_value"
+        )
+
+        regular_attribute_form = Form(configuration_attribute_model)
+        regular_attribute_form.name = "Test custom attribute"
+        regular_attribute_form.val_custom = False
+        with regular_attribute_form.value_ids.new() as value:
+            value.name = "Test value 1"
+        cls.regular_attribute = regular_attribute_form.save()
+
+        product_template_form = Form(cls.env["product.template"])
+        product_template_form.name = "Test configurable product"
+        with product_template_form.attribute_line_ids.new() as custom_line:
+            custom_line.attribute_id = cls.custom_attribute
+        with product_template_form.attribute_line_ids.new() as regular_line:
+            regular_line.attribute_id = cls.regular_attribute
+            regular_line.value_ids.add(first(cls.regular_attribute.value_ids))
+        product_template = product_template_form.save()
+        product_template.config_ok = True
+        cls.product_template = product_template
+
+    def test_integer_multiplier_formula(self):
+        """The custom attribute has a formula `custom_value` * `multiplier`,
+        check that the configuration's price is computed correctly.
+        """
+        # Arrange
+        regular_attribute = self.regular_attribute
+
+        multiplier = 5
+        custom_value = 3
+        custom_attribute = self.custom_attribute
+        custom_attribute.custom_type = "integer"
+        custom_attribute.configurator_extra_price_formula = (
+            "price = custom_value * %s" % multiplier
+        )
+        custom_attribute_value = self.custom_attribute_value
+
+        product_template = self.product_template
+
+        # Act: configure the product
+        wizard_action = product_template.configure_product()
+        wizard = self.env[wizard_action["res_model"]].browse(wizard_action["res_id"])
+        self.assertEqual(wizard.state, "select")
+        wizard.action_next_step()
+        self.assertEqual(wizard.state, "configure")
+        fields_prefixes = wizard._prefixes
+        field_prefix = fields_prefixes.get("field_prefix")
+        custom_field_prefix = fields_prefixes.get("custom_field_prefix")
+        wizard.write(
+            {
+                field_prefix
+                + str(regular_attribute.id): first(regular_attribute.value_ids).id,
+                field_prefix + str(custom_attribute.id): custom_attribute_value.id,
+                custom_field_prefix + str(custom_attribute.id): custom_value,
+            }
+        )
+        wizard.action_config_done()
+
+        # Assert
+        configured_session = wizard.config_session_id
+        configured_custom_value = configured_session.custom_value_ids
+        self.assertEqual(configured_custom_value.price, custom_value * multiplier)
+
+        expected_configuration_price = (
+            product_template.list_price + configured_custom_value.price
+        )
+        self.assertEqual(configured_session.price, expected_configuration_price)
+
+        # Act: change the custom value
+        new_custom_value = 2
+        configured_custom_value.value = "%s" % new_custom_value
+
+        # Assert: the price has changed
+        new_expected_custom_price = new_custom_value * multiplier
+        self.assertEqual(configured_custom_value.price, new_expected_custom_price)
+
+        new_expected_configuration_price = (
+            product_template.list_price + configured_custom_value.price
+        )
+        self.assertEqual(configured_session.price, new_expected_configuration_price)

product_configurator/views/product_attribute_view.xml

@@ -82,6 +82,9 @@
                         <group>
                             <field name="search_ok" />
                         </group>
+                        <group>
+                            <field name="configurator_extra_price_formula" />
+                        </group>
                     </group>
                 </page>
             </xpath>

product_configurator/views/product_config_view.xml

@@ -172,6 +172,7 @@
                                 <tree editable="bottom">
                                     <field name="attribute_id" />
                                     <field name="value" />
+                                    <field name="price" />
                                     <field
                                         name="attachment_ids"
                                         widget="many2many_tags"