<h3>Düzenle: class-wp-classic-to-block-menu-converter.php</h3>
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/**
 * WP_Classic_To_Block_Menu_Converter class
 *
 * @package WordPress
 * @since 6.3.0
 */

/**
 * Converts a Classic Menu to Block Menu blocks.
 *
 * @since 6.3.0
 */
class WP_Classic_To_Block_Menu_Converter {

	/**
	 * Converts a Classic Menu to blocks.
	 *
	 * @since 6.3.0
	 *
	 * @param WP_Term $menu The Menu term object of the menu to convert.
	 * @return string|WP_Error The serialized and normalized parsed blocks on success,
	 *                         an empty string when there are no menus to convert,
	 *                         or WP_Error on invalid menu.
	 */
	public static function convert( $menu ) {

		if ( ! is_nav_menu( $menu ) ) {
			return new WP_Error(
				&#039;invalid_menu&#039;,
				__( &#039;The menu provided is not a valid menu.&#039; )
			);
		}

		$menu_items = wp_get_nav_menu_items( $menu-&gt;term_id, array( &#039;update_post_term_cache&#039; =&gt; false ) );

		if ( empty( $menu_items ) ) {
			return &#039;&#039;;
		}

		// Set up the $menu_item variables.
		// Adds the class property classes for the current context, if applicable.
		_wp_menu_item_classes_by_context( $menu_items );

		$menu_items_by_parent_id = static::group_by_parent_id( $menu_items );

		$first_menu_item = isset( $menu_items_by_parent_id[0] )
			? $menu_items_by_parent_id[0]
			: array();

		$inner_blocks = static::to_blocks(
			$first_menu_item,
			$menu_items_by_parent_id
		);

		return serialize_blocks( $inner_blocks );
	}

	/**
	 * Returns an array of menu items grouped by the id of the parent menu item.
	 *
	 * @since 6.3.0
	 *
	 * @param array $menu_items An array of menu items.
	 * @return array
	 */
	private static function group_by_parent_id( $menu_items ) {
		$menu_items_by_parent_id = array();

		foreach ( $menu_items as $menu_item ) {
			$menu_items_by_parent_id[ $menu_item-&gt;menu_item_parent ][] = $menu_item;
		}

		return $menu_items_by_parent_id;
	}

	/**
	 * Turns menu item data into a nested array of parsed blocks
	 *
	 * @since 6.3.0
	 *
	 * @param array $menu_items              An array of menu items that represent
	 *                                       an individual level of a menu.
	 * @param array $menu_items_by_parent_id An array keyed by the id of the
	 *                                       parent menu where each element is an
	 *                                       array of menu items that belong to
	 *                                       that parent.
	 * @return array An array of parsed block data.
	 */
	private static function to_blocks( $menu_items, $menu_items_by_parent_id ) {

		if ( empty( $menu_items ) ) {
			return array();
		}

		$blocks = array();

		foreach ( $menu_items as $menu_item ) {
			$class_name       = ! empty( $menu_item-&gt;classes ) ? implode( &#039; &#039;, (array) $menu_item-&gt;classes ) : null;
			$id               = ( null !== $menu_item-&gt;object_id &amp;&amp; &#039;custom&#039; !== $menu_item-&gt;object ) ? $menu_item-&gt;object_id : null;
			$opens_in_new_tab = null !== $menu_item-&gt;target &amp;&amp; &#039;_blank&#039; === $menu_item-&gt;target;
			$rel              = ( null !== $menu_item-&gt;xfn &amp;&amp; &#039;&#039; !== $menu_item-&gt;xfn ) ? $menu_item-&gt;xfn : null;
			$kind             = null !== $menu_item-&gt;type ? str_replace( &#039;_&#039;, &#039;-&#039;, $menu_item-&gt;type ) : &#039;custom&#039;;

			$block = array(
				&#039;blockName&#039; =&gt; isset( $menu_items_by_parent_id[ $menu_item-&gt;ID ] ) ? &#039;core/navigation-submenu&#039; : &#039;core/navigation-link&#039;,
				&#039;attrs&#039;     =&gt; array(
					&#039;className&#039;     =&gt; $class_name,
					&#039;description&#039;   =&gt; $menu_item-&gt;description,
					&#039;id&#039;            =&gt; $id,
					&#039;kind&#039;          =&gt; $kind,
					&#039;label&#039;         =&gt; $menu_item-&gt;title,
					&#039;opensInNewTab&#039; =&gt; $opens_in_new_tab,
					&#039;rel&#039;           =&gt; $rel,
					&#039;title&#039;         =&gt; $menu_item-&gt;attr_title,
					&#039;type&#039;          =&gt; $menu_item-&gt;object,
					&#039;url&#039;           =&gt; $menu_item-&gt;url,
				),
			);

			$block[&#039;innerBlocks&#039;]  = isset( $menu_items_by_parent_id[ $menu_item-&gt;ID ] )
			? static::to_blocks( $menu_items_by_parent_id[ $menu_item-&gt;ID ], $menu_items_by_parent_id )
			: array();
			$block[&#039;innerContent&#039;] = array_map( &#039;serialize_block&#039;, $block[&#039;innerBlocks&#039;] );

			$blocks[] = $block;
		}

		return $blocks;
	}
}
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