private function calculate_redirection_url( $redirect_type ) {

		$available = $this->is_available_to_user( get_current_user_id() );

		if ( ! $available && 'no' === $this->get( 'checkout_redirect_forced' ) ) {
			$redirect_type = 'membership';
		}

		// by default, no special redirection is needed.
		$redirection = '';

		switch ( $redirect_type ) {

			// redirect to itself.
			case 'self':
				/**
				 * Only set up when it is a member's only access plan with forced redirection to course.
				 * This will ensure that on a regular access plan, no special parameter is added to querystring.
				 * At the same time, if it is a members' only access plan,
				 * after membership checkout we'd like to force redirect to course
				 */
				if ( ! $available && llms_parse_bool( $this->get( 'checkout_redirect_forced' ) ) ) {
					$redirection = get_permalink( $this->get( 'product_id' ) );
				}
				break;

			case 'page':
				$redirection = get_permalink( $this->get( 'checkout_redirect_page' ) );
				break;

			case 'url':
				$redirection = $this->get( 'checkout_redirect_url' );
				break;

		}

		return $redirection;

	}