<?php

/**

 * REST API: WP_REST_Block_Directory_Controller class

 *

 * @package WordPress

 * @subpackage REST_API

 * @since 5.5.0

 */

/**

 * Controller which provides REST endpoint for the blocks.

 *

 * @since 5.5.0

 *

 * @see WP_REST_Controller

 */

class WP_REST_Block_Directory_Controller extends WP_REST_Controller {

	/**

	 * Constructs the controller.

	 */

	public function __construct() {

		$this->namespace = 'wp/v2';

		$this->rest_base = 'block-directory';

	}

	/**

	 * Registers the necessary REST API routes.

	 */

	public function register_routes() {

		register_rest_route(

			$this->namespace,

			'/' . $this->rest_base . '/search',

			array(

				array(

					'methods'             => WP_REST_Server::READABLE,

					'callback'            => array( $this, 'get_items' ),

					'permission_callback' => array( $this, 'get_items_permissions_check' ),

					'args'                => $this->get_collection_params(),

				),

				'schema' => array( $this, 'get_public_item_schema' ),

			)

		);

	}

	/**

	 * Checks whether a given request has permission to install and activate plugins.

	 *

	 * @since 5.5.0

	 *

	 * @param WP_REST_Request $request Full details about the request.

	 *

	 * @return WP_Error|bool True if the request has permission, WP_Error object otherwise.

	 */

	public function get_items_permissions_check( $request ) {

		if ( ! current_user_can( 'install_plugins' ) || ! current_user_can( 'activate_plugins' ) ) {

			return new WP_Error(

				'rest_block_directory_cannot_view',

				__( 'Sorry, you are not allowed to browse the block directory.' ),

				array( 'status' => rest_authorization_required_code() )

			);

		}

		return true;

	}

	/**

	 * Search and retrieve blocks metadata

	 *

	 * @since 5.5.0

	 *

	 * @param WP_REST_Request $request Full details about the request.

	 *

	 * @return WP_Error|WP_REST_Response Response object on success, or WP_Error object on failure.

	 */

	public function get_items( $request ) {

		require_once ABSPATH . 'wp-admin/includes/plugin-install.php';

		require_once ABSPATH . 'wp-admin/includes/plugin.php';

		$response = plugins_api(

			'query_plugins',

			array(

				'block'    => $request['term'],

				'per_page' => $request['per_page'],

				'page'     => $request['page'],

			)

		);

		if ( is_wp_error( $response ) ) {

			$response->add_data( array( 'status' => 500 ) );

			return $response;

		}

		$result = array();

		foreach ( $response->plugins as $plugin ) {

			// If the API returned a plugin with empty data for 'blocks', skip it.

			if ( empty( $plugin['blocks'] ) ) {

				continue;

			}

			$data     = $this->prepare_item_for_response( $plugin, $request );

			$result[] = $this->prepare_response_for_collection( $data );

		}

		return rest_ensure_response( $result );

	}

	/**

	 * Parse block metadata for a block, and prepare it for an API repsonse.

	 *

	 * @since 5.5.0

	 *

	 * @param array           $plugin  The plugin metadata.

	 * @param WP_REST_Request $request Request object.

	 *

	 * @return WP_Error|WP_REST_Response Response object on success, or WP_Error object on failure.

	 */

	public function prepare_item_for_response( $plugin, $request ) {

		// There might be multiple blocks in a plugin. Only the first block is mapped.

		$block_data = reset( $plugin['blocks'] );

		// A data array containing the properties we'll return.

		$block = array(

			'name'                => $block_data['name'],

			'title'               => ( $block_data['title'] ? $block_data['title'] : $plugin['name'] ),

			'description'         => wp_trim_words( $plugin['description'], 30, '...' ),

			'id'                  => $plugin['slug'],

			'rating'              => $plugin['rating'] / 20,

			'rating_count'        => intval( $plugin['num_ratings'] ),

			'active_installs'     => intval( $plugin['active_installs'] ),

			'author_block_rating' => $plugin['author_block_rating'] / 20,

			'author_block_count'  => intval( $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 );

		$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'        => 'integer',

					'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'        => 'string',

					'context'     => array( 'view' ),

				),

				'author_block_rating' => array(

					'description' => __( 'The average rating of blocks published by the same author.' ),

					'type'        => 'integer',

					'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, in fuzzy human readable format.' ),

					'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'] );

		/**

		 * Filter 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 );

	}

}