AyeCode / invoicing

        $post_type = get_post_type_object( $this->post_type );

		if ( 'edit' === $request['context'] && ! current_user_can( $post_type->cap->edit_posts ) ) {

			return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to edit invoices.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );

		}

		// Read checks will be evaluated on a per invoice basis

		$post_type = get_post_type_object( $this->post_type );

		if ( ! current_user_can( $post_type->cap->create_posts ) ) {

			return new WP_Error( 

                'rest_cannot_create', 

                __( 'Sorry, you are not allowed to create invoices as this user.', 'invoicing' ), 

                array( 

                    'status' => rest_authorization_required_code(),

                )

            );

        }

		return true;

    }

		$post_type = get_post_type_object( $this->post_type );

		if ( ! current_user_can(  $post_type->cap->edit_post, $invoice->ID  ) ) {

			return new WP_Error( 

                'rest_cannot_edit', 

                __( 'Sorry, you are not allowed to update this invoice.', 'invoicing' ), 

                array( 

                    'status' => rest_authorization_required_code(),

                )

            );

        }

		return true;

	}