?<h3>D¨ızenle: class-wp-rest-block-patterns-controller.php</h3>
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/**
 * REST API: WP_REST_Block_Patterns_Controller class
 *
 * @package    WordPress
 * @subpackage REST_API
 * @since      6.0.0
 */

/**
 * Core class used to access block patterns via the REST API.
 *
 * @since 6.0.0
 *
 * @see WP_REST_Controller
 */
class WP_REST_Block_Patterns_Controller extends WP_REST_Controller {

	/**
	 * Defines whether remote patterns should be loaded.
	 *
	 * @since 6.0.0
	 * @var bool
	 */
	private $remote_patterns_loaded;

	/**
	 * An array that maps old categories names to new ones.
	 *
	 * @since 6.2.0
	 * @var array
	 */
	protected static $categories_migration = array(
		&#039;buttons&#039; =&gt; &#039;call-to-action&#039;,
		&#039;columns&#039; =&gt; &#039;text&#039;,
		&#039;query&#039;   =&gt; &#039;posts&#039;,
	);

	/**
	 * Constructs the controller.
	 *
	 * @since 6.0.0
	 */
	public function __construct() {
		$this-&gt;namespace = &#039;wp/v2&#039;;
		$this-&gt;rest_base = &#039;block-patterns/patterns&#039;;
	}

	/**
	 * Registers the routes for the objects of the controller.
	 *
	 * @since 6.0.0
	 */
	public function register_routes() {
		register_rest_route(
			$this-&gt;namespace,
			&#039;/&#039; . $this-&gt;rest_base,
			array(
				array(
					&#039;methods&#039;             =&gt; WP_REST_Server::READABLE,
					&#039;callback&#039;            =&gt; array( $this, &#039;get_items&#039; ),
					&#039;permission_callback&#039; =&gt; array( $this, &#039;get_items_permissions_check&#039; ),
				),
				&#039;schema&#039; =&gt; array( $this, &#039;get_public_item_schema&#039; ),
			)
		);
	}

	/**
	 * Checks whether a given request has permission to read block patterns.
	 *
	 * @since 6.0.0
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return true|WP_Error True if the request has read access, WP_Error object otherwise.
	 */
	public function get_items_permissions_check( $request ) {
		if ( current_user_can( &#039;edit_posts&#039; ) ) {
			return true;
		}

		foreach ( get_post_types( array( &#039;show_in_rest&#039; =&gt; true ), &#039;objects&#039; ) as $post_type ) {
			if ( current_user_can( $post_type-&gt;cap-&gt;edit_posts ) ) {
				return true;
			}
		}

		return new WP_Error(
			&#039;rest_cannot_view&#039;,
			__( &#039;Sorry, you are not allowed to view the registered block patterns.&#039; ),
			array( &#039;status&#039; =&gt; rest_authorization_required_code() )
		);
	}

	/**
	 * Retrieves all block patterns.
	 *
	 * @since 6.0.0
	 * @since 6.2.0 Added migration for old core pattern categories to the new ones.
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
	 */
	public function get_items( $request ) {
		if ( ! $this-&gt;remote_patterns_loaded ) {
			// Load block patterns from w.org.
			_load_remote_block_patterns(); // Patterns with the `core` keyword.
			_load_remote_featured_patterns(); // Patterns in the `featured` category.
			_register_remote_theme_patterns(); // Patterns requested by current theme.

			$this-&gt;remote_patterns_loaded = true;
		}

		$response = array();
		$patterns = WP_Block_Patterns_Registry::get_instance()-&gt;get_all_registered();
		foreach ( $patterns as $pattern ) {
			$migrated_pattern = $this-&gt;migrate_pattern_categories( $pattern );
			$prepared_pattern = $this-&gt;prepare_item_for_response( $migrated_pattern, $request );
			$response[]       = $this-&gt;prepare_response_for_collection( $prepared_pattern );
		}
		return rest_ensure_response( $response );
	}

	/**
	 * Migrates old core pattern categories to the new categories.
	 *
	 * Core pattern categories are revamped. Migration is needed to ensure
	 * backwards compatibility.
	 *
	 * @since 6.2.0
	 *
	 * @param array $pattern Raw pattern as registered, before applying any changes.
	 * @return array Migrated pattern.
	 */
	protected function migrate_pattern_categories( $pattern ) {
		// No categories to migrate.
		if (
			! isset( $pattern[&#039;categories&#039;] ) ||
			! is_array( $pattern[&#039;categories&#039;] )
		) {
			return $pattern;
		}

		foreach ( $pattern[&#039;categories&#039;] as $index =&gt; $category ) {
			// If the category exists as a key, then it needs migration.
			if ( isset( static::$categories_migration[ $category ] ) ) {
				$pattern[&#039;categories&#039;][ $index ] = static::$categories_migration[ $category ];
			}
		}

		return $pattern;
	}

	/**
	 * Prepare a raw block pattern before it gets output in a REST API response.
	 *
	 * @since 6.0.0
	 * @since 6.3.0 Added `source` property.
	 *
	 * @param array           $item    Raw pattern as registered, before any changes.
	 * @param WP_REST_Request $request Request object.
	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
	 */
	public function prepare_item_for_response( $item, $request ) {
		// Resolve pattern blocks so they don&#039;t need to be resolved client-side
		// in the editor, improving performance.
		$blocks          = parse_blocks( $item[&#039;content&#039;] );
		$blocks          = resolve_pattern_blocks( $blocks );
		$item[&#039;content&#039;] = serialize_blocks( $blocks );

		$fields = $this-&gt;get_fields_for_response( $request );
		$keys   = array(
			&#039;name&#039;          =&gt; &#039;name&#039;,
			&#039;title&#039;         =&gt; &#039;title&#039;,
			&#039;content&#039;       =&gt; &#039;content&#039;,
			&#039;description&#039;   =&gt; &#039;description&#039;,
			&#039;viewportWidth&#039; =&gt; &#039;viewport_width&#039;,
			&#039;inserter&#039;      =&gt; &#039;inserter&#039;,
			&#039;categories&#039;    =&gt; &#039;categories&#039;,
			&#039;keywords&#039;      =&gt; &#039;keywords&#039;,
			&#039;blockTypes&#039;    =&gt; &#039;block_types&#039;,
			&#039;postTypes&#039;     =&gt; &#039;post_types&#039;,
			&#039;templateTypes&#039; =&gt; &#039;template_types&#039;,
			&#039;source&#039;        =&gt; &#039;source&#039;,
		);
		$data   = array();
		foreach ( $keys as $item_key =&gt; $rest_key ) {
			if ( isset( $item[ $item_key ] ) &amp;&amp; rest_is_field_included( $rest_key, $fields ) ) {
				$data[ $rest_key ] = $item[ $item_key ];
			}
		}

		$context = ! empty( $request[&#039;context&#039;] ) ? $request[&#039;context&#039;] : &#039;view&#039;;
		$data    = $this-&gt;add_additional_fields_to_object( $data, $request );
		$data    = $this-&gt;filter_response_by_context( $data, $context );
		return rest_ensure_response( $data );
	}

	/**
	 * Retrieves the block pattern schema, conforming to JSON Schema.
	 *
	 * @since 6.0.0
	 * @since 6.3.0 Added `source` property.
	 *
	 * @return array Item schema data.
	 */
	public function get_item_schema() {
		if ( $this-&gt;schema ) {
			return $this-&gt;add_additional_fields_schema( $this-&gt;schema );
		}

		$schema = array(
			&#039;$schema&#039;    =&gt; &#039;http://json-schema.org/draft-04/schema#&#039;,
			&#039;title&#039;      =&gt; &#039;block-pattern&#039;,
			&#039;type&#039;       =&gt; &#039;object&#039;,
			&#039;properties&#039; =&gt; array(
				&#039;name&#039;           =&gt; array(
					&#039;description&#039; =&gt; __( &#039;The pattern name.&#039; ),
					&#039;type&#039;        =&gt; &#039;string&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;title&#039;          =&gt; array(
					&#039;description&#039; =&gt; __( &#039;The pattern title, in human readable format.&#039; ),
					&#039;type&#039;        =&gt; &#039;string&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;content&#039;        =&gt; array(
					&#039;description&#039; =&gt; __( &#039;The pattern content.&#039; ),
					&#039;type&#039;        =&gt; &#039;string&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;description&#039;    =&gt; array(
					&#039;description&#039; =&gt; __( &#039;The pattern detailed description.&#039; ),
					&#039;type&#039;        =&gt; &#039;string&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;viewport_width&#039; =&gt; array(
					&#039;description&#039; =&gt; __( &#039;The pattern viewport width for inserter preview.&#039; ),
					&#039;type&#039;        =&gt; &#039;number&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;inserter&#039;       =&gt; array(
					&#039;description&#039; =&gt; __( &#039;Determines whether the pattern is visible in inserter.&#039; ),
					&#039;type&#039;        =&gt; &#039;boolean&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;categories&#039;     =&gt; array(
					&#039;description&#039; =&gt; __( &#039;The pattern category slugs.&#039; ),
					&#039;type&#039;        =&gt; &#039;array&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;keywords&#039;       =&gt; array(
					&#039;description&#039; =&gt; __( &#039;The pattern keywords.&#039; ),
					&#039;type&#039;        =&gt; &#039;array&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;block_types&#039;    =&gt; array(
					&#039;description&#039; =&gt; __( &#039;Block types that the pattern is intended to be used with.&#039; ),
					&#039;type&#039;        =&gt; &#039;array&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;post_types&#039;     =&gt; array(
					&#039;description&#039; =&gt; __( &#039;An array of post types that the pattern is restricted to be used with.&#039; ),
					&#039;type&#039;        =&gt; &#039;array&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;template_types&#039; =&gt; array(
					&#039;description&#039; =&gt; __( &#039;An array of template types where the pattern fits.&#039; ),
					&#039;type&#039;        =&gt; &#039;array&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
				),
				&#039;source&#039;         =&gt; array(
					&#039;description&#039; =&gt; __( &#039;Where the pattern comes from e.g. core&#039; ),
					&#039;type&#039;        =&gt; &#039;string&#039;,
					&#039;readonly&#039;    =&gt; true,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
					&#039;enum&#039;        =&gt; array(
						&#039;core&#039;,
						&#039;plugin&#039;,
						&#039;theme&#039;,
						&#039;pattern-directory/core&#039;,
						&#039;pattern-directory/theme&#039;,
						&#039;pattern-directory/featured&#039;,
					),
				),
			),
		);

		$this-&gt;schema = $schema;

		return $this-&gt;add_additional_fields_schema( $this-&gt;schema );
	}
}
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