or_block_count'  => (int) $plugin['author_block_count'],
			'author'              => wp_strip_all_tags( $plugin['author'] ),
			'icon'                => ( isset( $plugin['icons']['1x'] ) ? $plugin['icons']['1x'] : 'block-default' ),
			'last_updated'        => gmdate( 'Y-m-d\TH:i:s', strtotime( $plugin['last_updated'] ) ),
			'humanized_updated'   => sprintf(
				/* translators: %s: Human-readable time difference. */
				__( '%s ago' ),
				human_time_diff( strtotime( $plugin['last_updated'] ) )
			),
		);

		$this->add_additional_fields_to_object( $block, $request );

		$response = new WP_REST_Response( $block );

		if ( rest_is_field_included( '_links', $fields ) || rest_is_field_included( '_embedded', $fields ) ) {
			$response->add_links( $this->prepare_links( $plugin ) );
		}

		return $response;
	}

	/**
	 * Generates a list of links to include in the response for the plugin.
	 *
	 * @since 5.5.0
	 *
	 * @param array $plugin The plugin data from WordPress.org.
	 * @return array
	 */
	protected function prepare_links( $plugin ) {
		$links = array(
			'https://api.w.org/install-plugin' => array(
				'href' => add_query_arg( 'slug', urlencode( $plugin['slug'] ), rest_url( 'wp/v2/plugins' ) ),
			),
		);

		$plugin_file = $this->find_plugin_for_slug( $plugin['slug'] );

		if ( $plugin_file ) {
			$links['https://api.w.org/plugin'] = array(
				'href'       => rest_url( 'wp/v2/plugins/' . substr( $plugin_file, 0, - 4 ) ),
				'embeddable' => true,
			);
		}

		return $links;
	}

	/**
	 * Finds an installed plugin for the given slug.
	 *
	 * @since 5.5.0
	 *
	 * @param string $slug The WordPress.org directory slug for a plugin.
	 * @return string The plugin file found matching it.
	 */
	protected function find_plugin_for_slug( $slug ) {
		require_once ABSPATH . 'wp-admin/includes/plugin.php';

		$plugin_files = get_plugins( '/' . $slug );

		if ( ! $plugin_files ) {
			return '';
		}

		$plugin_files = array_keys( $plugin_files );

		return $slug . '/' . reset( $plugin_files );
	}

	/**
	 * Retrieves the theme's schema, conforming to JSON Schema.
	 *
	 * @since 5.5.0
	 *
	 * @return array Item schema data.
	 */
	public function get_item_schema() {
		if ( $this->schema ) {
			return $this->add_additional_fields_schema( $this->schema );
		}

		$this->schema = array(
			'$schema'    => 'http://json-schema.org/draft-04/schema#',
			'title'      => 'block-directory-item',
			'type'       => 'object',
			'properties' => array(
				'name'                => array(
					'description' => __( 'The block name, in namespace/block-name format.' ),
					'type'        => 'string',
					'context'     => array( 'view' ),
				),
				'title'               => array(
					'description' => __( 'The block title, in human readable format.' ),
					'type'        => 'string',
					'context'     => array( 'view' ),
				),
				'description'         => array(
					'description' => __( 'A short description of the block, in human readable format.' ),
					'type'        => 'string',
					'context'     => array( 'view' ),
				),
				'id'                  => array(
					'description' => __( 'The block slug.' ),
					'type'        => 'string',
					'context'     => array( 'view' ),
				),
				'rating'              => array(
					'description' => __( 'The star rating of the block.' ),
					'type'        => 'number',
					'context'     => array( 'view' ),
				),
				'rating_count'        => array(
					'description' => __( 'The number of ratings.' ),
					'type'        => 'integer',
					'context'     => array( 'view' ),
				),
				'active_installs'     => array(
					'description' => __( 'The number sites that have activated this block.' ),
					'type'        => 'integer',
					'context'     => array( 'view' ),
				),
				'author_block_rating' => array(
					'description' => __( 'The average rating of blocks published by the same author.' ),
					'type'        => 'number',
					'context'     => array( 'view' ),
				),
				'author_block_count'  => array(
					'description' => __( 'The number of blocks published by the same author.' ),
					'type'        => 'integer',
					'context'     => array( 'view' ),
				),
				'author'              => array(
					'description' => __( 'The WordPress.org username of the block author.' ),
					'type'        => 'string',
					'context'     => array( 'view' ),
				),
				'icon'                => array(
					'description' => __( 'The block icon.' ),
					'type'        => 'string',
					'format'      => 'uri',
					'context'     => array( 'view' ),
				),
				'last_updated'        => array(
					'description' => __( 'The date when the block was last updated.' ),
					'type'        => 'string',
					'format'      => 'date-time',
					'context'     => array( 'view' ),
				),
				'humanized_updated'   => array(
					'description' => __( 'The date when the block was last updated, in fuzzy human readable format.' ),
					'type'        => 'string',
					'context'     => array( 'view' ),
				),
			),
		);

		return $this->add_additional_fields_schema( $this->schema );
	}

	/**
	 * Retrieves the search params for the blocks collection.
	 *
	 * @since 5.5.0
	 *
	 * @return array Collection parameters.
	 */
	public function get_collection_params() {
		$query_params = parent::get_collection_params();

		$query_params['context']['default'] = 'view';

		$query_params['term'] = array(
			'description' => __( 'Limit result set to blocks matching the search term.' ),
			'type'        => 'string',
			'required'    => true,
			'minLength'   => 1,
		);

		unset( $query_params['search'] );

		/**
		 * Filters REST API collection parameters for the block directory controller.
		 *
		 * @since 5.5.0
		 *
		 * @param array $query_params JSON Schema-formatted collection parameters.
		 */
		return apply_filters( 'rest_block_directory_collection_params', $query_params );
	}
}