n false;
		}

		check_admin_referer( 'rank-math-save-redirections', 'security' );
		if ( ! Helper::has_cap( 'redirections' ) ) {
			return false;
		}

		$cmb    = cmb2_get_metabox( 'rank-math-redirections' );
		$values = $cmb->get_sanitized_values( $_POST );

		$values['redirection_category'] = isset( $values['redirection_category'] ) && is_array( $values['redirection_category'] ) ? $values['redirection_category'] : [];
		unset( $_POST['redirection_category'], $_POST['set_redirection_category'] );

		if ( empty( $values['id'] ) ) {
			$this->save_categories = $values['redirection_category'];
			$this->action( 'rank_math/redirection/saved', 'save_category_after_add' );
			return true;
		}

		wp_set_object_terms( $values['id'], array_map( 'absint', $values['redirection_category'] ), 'rank_math_redirection_category' );
		return true;
	}

	/**
	 * Save categories with a delay so that we know the new redirection ID.
	 *
	 * @param object $redirection Redirection object passed to the hook.
	 * @return bool
	 */
	public function save_category_after_add( $redirection ) {
		wp_set_object_terms( $redirection->get_id(), array_map( 'absint', $this->save_categories ), 'rank_math_redirection_category' );

		return true;
	}

	/**
	 * Checks if page status is set to trashed.
	 *
	 * @return bool
	 */
	protected function is_trashed_page() {
		return 'trashed' === Param::get( 'status' );
	}

	/**
	 * Output category filter dropdown and the submit button for it in the tablenav area.
	 *
	 * @param string $which "top" or "bottom".
	 * @return void
	 */
	public function category_filter( $which ) {
		if ( $this->is_trashed_page() ) {
			return;
		}

		$dropdown_args = [
			'taxonomy'          => 'rank_math_redirection_category',
			'show_option_all'   => false,
			'show_option_none'  => __( 'Select Category', 'rank-math-pro' ),
			'option_none_value' => 'none',
			'echo'              => false,
			'hierarchical'      => true,
			'name'              => 'redirection_category_filter_' . $which,
			'id'                => 'redirection-category-filter-' . $which,
			'selected'          => Param::get( 'redirection_category', '' ),
			'class'             => 'redirection-category-filter',
			'hide_empty'        => false,
		];

		$submit_args = [
			__( 'Filter', 'rank-math-pro' ), // text.
			'secondary category-filter-submit', // type.
			'rank_math_filter_redirections_' . $which, // name.
			false,  // wrap.
		];

		$clear_label    = __( 'Clear Filter', 'rank-math-pro' );
		$clear_url      = Helper::get_admin_url( 'redirections' );
		$clear_classes  = 'clear-redirection-category-filter';
		$clear_classes .= $dropdown_args['selected'] ? '' : ' hidden';
		$clear_button   = '<a href="' . $clear_url . '" class="' . esc_attr( $clear_classes ) . '" title="' . esc_attr( $clear_label ) . '"><span class="dashicons dashicons-dismiss"></span> ' . $clear_label . '</a>';

		$categories    = rtrim( wp_dropdown_categories( $dropdown_args ) );
		$submit_button = call_user_func_array( 'get_submit_button', $submit_args );

		echo sprintf( '%1$s%2$s%3$s', $categories, $submit_button, $clear_button );
	}

	/**
	 * Enqueue styles and scripts for Redirections & Redirection Categories screens.
	 *
	 * @param  string $hook Page hook prefix.
	 *
	 * @return void
	 */
	public function admin_scripts( $hook ) {
		$screen = get_current_screen();

		if ( ! in_array( $screen->id, [ 'rank-math_page_rank-math-redirections', 'edit-rank_math_redirection_category' ], true ) ) {
			return;
		}

		$url = RANK_MATH_PRO_URL . 'includes/modules/redirections/assets/';
		Helper::add_json( 'add_redirection_category_nonce', wp_create_nonce( 'add-rank_math_redirection_category' ) );
		wp_enqueue_style( 'rank-math-pro-redirections', $url . 'css/redirections.css', [], RANK_MATH_PRO_VERSION );
		wp_enqueue_script( 'rank-math-pro-redirections', $url . 'js/redirections.js', [], RANK_MATH_PRO_VERSION, true );
	}

	/**
	 * Extend get_redirections query to filter by category.
	 *
	 * @param object $table Table object.
	 * @param array  $args Get redirections function args.
	 * @return void
	 */
	public function get_redirections_query( $table, $args ) {
		$categories = Param::get( 'redirection_category' );
		if ( ! $categories ) {
			return;
		}

		$categories = array_map( 'absint', (array) $categories );

		global $wpdb;
		$table->leftJoin( $wpdb->term_relationships, $wpdb->prefix . 'rank_math_redirections.id', $wpdb->term_relationships . '.object_id' );
		$table->leftJoin( $wpdb->term_taxonomy, $wpdb->term_taxonomy . '.term_taxonomy_id', $wpdb->term_relationships . '.term_taxonomy_id' );
		$table->whereIn( $wpdb->term_taxonomy . '.term_id', $categories );
	}

	/**
	 * Import category from the Redirection plugin after importing the redirection itself.
	 *
	 * @param int   $redirection_id  Redirection ID of the imported redirection.
	 * @param array $source_data_row Data related to the redirection in the original table.
	 * @return void
	 */
	public function import_redirection_categories( $redirection_id, $source_data_row ) {
		if ( ! isset( $this->categories_imported ) ) {
			$this->import_categories_from_redirection_plugin();
		}

		if ( ! $source_data_row->group_id || ! isset( $this->import_categories[ $source_data_row->group_id ] ) ) {
			return;
		}

		wp_set_object_terms( $redirection_id, $this->import_categories[ $source_data_row->group_id ], 'rank_math_redirection_category' );
	}

	/**
	 * Import "groups" from Redirection plugin as redirection categories.
	 *
	 * @return bool
	 */
	public function import_categories_from_redirection_plugin() {
		global $wpdb;

		$count = 0;
		$rows  = $wpdb->get_results( "SELECT * FROM {$wpdb->prefix}redirection_groups" );

		$this->import_categories = [];

		if ( empty( $rows ) ) {
			$this->categories_imported = true;
			return false;
		}

		foreach ( (array) $rows as $row ) {
			$insert = wp_insert_term( $row->name, 'rank_math_redirection_category' );
			if ( ! is_array( $insert ) || ! isset( $insert['term_id'] ) ) {
				continue;
			}
			$this->import_categories[ $row->id ] = $insert['term_id'];
		}

		$this->categories_imported = true;
		return true;
	}

	/**
	 * Show link to go back to the Redirections from the Redirections Categories screen.
	 *
	 * @param string $taxonomy Current taxonomy.
	 *
	 * @return void
	 */
	public function back_to_redirections_link( $taxonomy ) {
		$link = Helper::get_admin_url( 'redirections' );
		echo '<p><a href="' . esc_url( $link ) . '">' . esc_html__( '&larr; Go Back to the Redirections', 'rank-math-pro' ) . '</a></p>';
	}
}