[IMP] hr_payroll_hibou: Control the 'wage_type' at the HR Contract Level

This will make it possible to be more abstract with 'work_type' or 'worked days lines' and overtime.

hr_payroll_hibou/models/hr_contract.py

@@ -0,0 +1,20 @@
+from odoo import fields, models
+
+
+class HrContract(models.Model):
+    _inherit = 'hr.contract'
+
+    wage_type = fields.Selection([('monthly', 'Period Fixed Wage'), ('hourly', 'Hourly Wage')],
+                                 default='monthly', required=True, related=False)
+
+    def _get_contract_wage(self, work_type=None):
+        # Override if you pay differently for different work types
+        # In 14.0, this utilizes new computed field mechanism,
+        # but will still get the 'wage' field by default.
+        self.ensure_one()
+        return self[self._get_contract_wage_field(work_type=work_type)]
+
+    def _get_contract_wage_field(self, work_type=None):
+        if self.wage_type == 'hourly':
+            return 'hourly_wage'
+        return super()._get_contract_wage_field()