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wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-explat/src/class-explat.php

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+<?php
+/**
+ * Package description here
+ *
+ * @package automattic/jetpack-explat
+ */
+
+namespace Automattic\Jetpack;
+
+use Automattic\Jetpack\Connection\Rest_Authentication;
+use Automattic\Jetpack\ExPlat\REST_Controller;
+
+/**
+ * Class description.
+ */
+class ExPlat {
+
+	/**
+	 * ExPlat package version
+	 *
+	 * @var string
+	 */
+	const PACKAGE_VERSION = '0.4.33';
+
+	/**
+	 * Initializer.
+	 * Used to configure the ExPlat package
+	 *
+	 * @return void
+	 */
+	public static function init() {
+		if ( did_action( 'jetpack_explat_initialized' ) ) {
+			return;
+		}
+
+		// Set up the REST authentication hooks.
+		Rest_Authentication::init();
+
+		add_action( 'rest_api_init', array( REST_Controller::class, 'register' ) );
+
+		// Runs right after the Jetpack ExPlat package is initialized.
+		do_action( 'jetpack_explat_initialized' );
+	}
+}

wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-explat/src/class-rest-controller.php

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+<?php
+/**
+ * The ExPlat Rest Controller class.
+ * Registers the REST routes for ExPlat backend
+ *
+ * @package automattic/jetpack-explat
+ */
+
+namespace Automattic\Jetpack\ExPlat;
+
+use Automattic\Jetpack\Connection\Client;
+use Automattic\Jetpack\Connection\Manager as Jetpack_Connection;
+use WP_Error;
+use WP_REST_Request;
+use WP_REST_Response;
+use WP_REST_Server;
+
+/**
+ * Registers general REST routes for ExPlat.
+ */
+class REST_Controller {
+	/**
+	 * Namespace for the REST API.
+	 *
+	 * @var string
+	 */
+	public static $namespace = 'jetpack/v4/explat';
+
+	/**
+	 * Current version of the ExPlat API and components
+	 *
+	 * @var string
+	 */
+	const EXPLAT_API_VERSION = '0.1.0';
+
+	/**
+	 * Base API URI for WordPress.com
+	 *
+	 * @var string
+	 */
+	const WPCOM_API_BASE_URL = 'https://public-api.wordpress.com/wpcom/v2';
+
+	/**
+	 * Registers the REST routes on the `rest_api_init` hook.
+	 *
+	 * Instantiated here, rather than eagerly, so the controller class only loads
+	 * on requests that reach `rest_api_init`. Static so the callback can be
+	 * unregistered.
+	 *
+	 * @access public
+	 */
+	public static function register() {
+		( new self() )->register_rest_routes();
+	}
+
+	/**
+	 * Registers the REST routes.
+	 *
+	 * @access public
+	 * @static
+	 */
+	public function register_rest_routes() {
+		register_rest_route(
+			static::$namespace,
+			'assignments',
+			array(
+				'methods'             => WP_REST_Server::READABLE,
+				'callback'            => array( $this, 'get_assignments' ),
+				'permission_callback' => '__return_true',
+				'args'                => array(
+					'experiment_name'   => array(
+						'type' => 'string',
+					),
+					'anon_id'           => array(
+						'type' => 'string',
+					),
+					'as_connected_user' => array(
+						'type' => 'boolean',
+					),
+					'platform'          => array(
+						'type'    => 'string',
+						'enum'    => array( 'jetpack', 'calypso', 'wpcom' ),
+						'default' => 'jetpack',
+					),
+				),
+			)
+		);
+	}
+
+	/**
+	 * Get the assignments for a given experiment and anon_id
+	 *
+	 * @param WP_REST_Request $request The REST request object.
+	 * @return WP_REST_Response|WP_Error
+	 */
+	public function get_assignments( $request ) {
+		$response          = null;
+		$is_user_connected = ( new Jetpack_Connection() )->is_user_connected();
+		$platform          = $request->get_param( 'platform' );
+		$request_path      = '/experiments/' . self::EXPLAT_API_VERSION . '/assignments/' . $platform;
+		$args              = array(
+			'experiment_names' => $request['experiment_name'],
+			'anon_id'          => $request['anon_id'],
+		);
+
+		if ( $request['as_connected_user'] && $is_user_connected ) {
+			$response = Client::wpcom_json_api_request_as_user(
+				add_query_arg( $args, $request_path ),
+				'v2',
+				array(
+					'headers' => array(
+						'User-Agent' => 'Jetpack MU WPCOM Plugin Experiment Assignment',
+					),
+				)
+			);
+		} else {
+			$response = wp_remote_get(
+				add_query_arg( $args, self::WPCOM_API_BASE_URL . $request_path )
+			);
+		}
+
+		if ( is_wp_error( $response ) ) {
+			return new WP_Error(
+				'wp_error_fetching_assignment',
+				$response->get_error_message(),
+				array( 'status' => 500 )
+			);
+		}
+
+		$response_code = wp_remote_retrieve_response_code( $response );
+
+		if ( 200 !== $response_code ) {
+			return new WP_Error(
+				'http_error_fetching_assignment',
+				wp_remote_retrieve_response_message( $response ),
+				array( 'status' => $response_code )
+			);
+		}
+
+		return rest_ensure_response(
+			json_decode( wp_remote_retrieve_body( $response ), true )
+		);
+	}
+}