[REF] hr_timesheet_overtime: Make more extensible

Signed-off-by: Carmen Bianca BAKKER <[email protected]>

hr_timesheet_overtime/models/account_analytic_line.py

@@ -31,17 +31,19 @@ def _update_values(self, values):
         Update values if date or unit_amount fields have changed
         """
         if "date" in values or "unit_amount" in values:
+            # TODO: self.date and self.unit_amount do not exist when called from
+            # create().
             date = values.get("date", self.date)
             unit_amount = values.get("unit_amount", self.unit_amount)
-
-            # rate management
-            weekday = fields.Date.from_string(date).weekday()
-            rate = (
-                self.env["resource.overtime.rate"]
-                .search([("dayofweek", "=", weekday)], limit=1)
-                .rate
-                or 1.0
-            )
-
-            # update
-            values["unit_amount"] = unit_amount * rate
+            values["unit_amount"] = unit_amount * self.rate_for_date(date)
+
+    @api.model
+    def rate_for_date(self, date):
+        # n.b. from_string also works on date objects, returning itself.
+        weekday = fields.Date.from_string(date).weekday()
+        return (
+            self.env["resource.overtime.rate"]
+            .search([("dayofweek", "=", weekday)], limit=1)
+            .rate
+            or 1.0
+        )