public function cancel_subscription() {

		// Invalid nonce or the form wasn't submitted.
		if ( ! llms_verify_nonce( '_cancel_sub_nonce', 'llms_cancel_subscription', 'POST' ) ) {
			return;
		} elseif ( empty( $_POST['order_id'] ) ) {
			return llms_add_notice( __( 'Something went wrong. Please try again.', 'lifterlms' ), 'error' );
		}

		$order = llms_get_post( llms_filter_input( INPUT_POST, 'order_id', FILTER_SANITIZE_NUMBER_INT ) );
		$uid   = get_current_user_id();

		if ( ! $order || $uid != $order->get( 'user_id' ) ) {
			return llms_add_notice( __( 'Something went wrong. Please try again.', 'lifterlms' ), 'error' );
		}

		$note = __( 'Subscription cancelled by student from account page.', 'lifterlms' );

		// Active subscriptions move to pending-cancel.
		// All other statuses are cancelled immediately.
		if ( 'llms-active' === $order->get( 'status' ) ) {
			$new_status = 'pending-cancel';
			$note      .= ' ' . __( 'Enrollment will be cancelled at the end of the prepaid period.', 'lifterlms' );
		} else {
			$new_status = 'cancelled';
		}

		$order->set_status( $new_status );
		$order->add_note( $note );

		do_action( 'llms_subscription_cancelled_by_student', $order, $uid );

	}