[IMP] base: use helper methods for implied groups

In this PR, we add a helper method to add/remove implied groups - update the base to use these instead

Task 2610735

odoo/addons/base/models/res_config.py

@@ -577,10 +577,9 @@ class ResConfigSettings(models.TransientModel, ResConfigModuleInstallationMixin)
                 if self[name] == current_settings[name]:
                     continue
                 if int(self[name]):
-                    groups.write({'implied_ids': [Command.link(implied_group.id)]})
+                    groups._apply_group(implied_group)
                 else:
-                    groups.write({'implied_ids': [Command.unlink(implied_group.id)]})
-                    implied_group.write({'users': [Command.unlink(user.id) for user in groups.users]})
+                    groups._remove_group(implied_group)
 
         # config fields: store ir.config_parameters
         IrConfigParameter = self.env['ir.config_parameter'].sudo()

odoo/addons/base/models/res_users.py

@@ -1091,6 +1091,21 @@ class GroupsImplied(models.Model):
             self._check_one_user_type()
         return res
 
+    def _apply_group(self, implied_group):
+        """ Add the given group to the groups implied by the current group
+        :param implied_group: the implied group to add
+        """
+        if implied_group not in self.implied_ids:
+            self.write({'implied_ids': [Command.link(implied_group.id)]})
+
+    def _remove_group(self, implied_group):
+        """ Remove the given group from the implied groups of the current group
+        :param implied_group: the implied group to remove
+        """
+        if implied_group in self.implied_ids:
+            self.write({'implied_ids': [Command.unlink(implied_group.id)]})
+            implied_group.write({'users': [Command.unlink(user.id) for user in self.users]})
+
 class UsersImplied(models.Model):
     _inherit = 'res.users'