public function is_transaction_valid_post() { $main_id = $this->input->post('mainId'); $branch_id = $this->input->post('branchId'); $return_id_from_branch = $this->input->post('returnIdFromBranch'); $transaction = $this->input->post('transaction'); $settings_repo = new Settings_Repository($this->base_model->get_db_instance()); $branches_repo = new Branches_Repository($this->base_model->get_db_instance()); $returns_repo = new Returns_Repository($this->base_model->get_db_instance()); if ($transaction != Transaction_Type::Return_Items) { echo 1; } else { if ($settings_repo->get_settings()->app_id != $main_id) { echo -2; } else { if (!$branches_repo->branch_exists($branch_id)) { echo -1; } else { if ($returns_repo->return_exists_via_return_id_from_branch($return_id_from_branch, $branch_id)) { echo 0; } else { echo 2; } } } } // valid return }