( 'wp_login' === $current_filter ) {
			$user = get_user_by( 'ID', $args[1]->data->ID );
		} else {
			$user = wp_get_current_user();
		}

		$roles           = new Roles();
		$translated_role = $roles->translate_user_to_role( $user );

		$actor = array(
			'wpcom_user_id'    => null,
			'external_user_id' => $user->ID ?? null,
			'display_name'     => $user->display_name ?? null,
			'user_email'       => $user->user_email ?? null,
			'user_roles'       => $user->roles ?? null,
			'translated_role'  => $translated_role ? $translated_role : null,
			'is_cron'          => defined( 'DOING_CRON' ) ? DOING_CRON : false,
			'is_rest'          => defined( 'REST_API_REQUEST' ) ? REST_API_REQUEST : false,
			'is_xmlrpc'        => defined( 'XMLRPC_REQUEST' ) ? XMLRPC_REQUEST : false,
			'is_wp_rest'       => defined( 'REST_REQUEST' ) ? REST_REQUEST : false,
			'is_ajax'          => defined( 'DOING_AJAX' ) ? DOING_AJAX : false,
			'is_wp_admin'      => is_admin(),
			'is_cli'           => defined( 'WP_CLI' ) ? WP_CLI : false,
			'from_url'         => $this->get_request_url(),
		);

		if ( $this->should_send_user_data_with_actor( $current_filter ) ) {
			$ip = IP_Utils::get_ip();

			$actor['ip']         = $ip ? $ip : '';
			$actor['user_agent'] = isset( $_SERVER['HTTP_USER_AGENT'] ) ? sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) : 'unknown';
		}

		$raw_mcp_header = '';
		if ( isset( $_SERVER['HTTP_X_WPCOM_MCP'] ) && is_string( $_SERVER['HTTP_X_WPCOM_MCP'] ) ) {
			$raw_mcp_header = trim( wp_unslash( $_SERVER['HTTP_X_WPCOM_MCP'] ) ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Sanitization happens below.
		}

		if ( ! empty( $raw_mcp_header ) && preg_match( '/^[A-Za-z0-9+\/=]+$/', $raw_mcp_header ) ) {
			// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode -- Decoding MCP header payload.
			$decoded = base64_decode( $raw_mcp_header, true );
			if ( false !== $decoded ) {
				$mcp_data = json_decode( $decoded, true );
				if ( is_array( $mcp_data ) ) {
					if ( isset( $mcp_data['mcp_client_name'] ) && is_string( $mcp_data['mcp_client_name'] ) ) {
						$actor['mcp_client_name'] = sanitize_text_field( $mcp_data['mcp_client_name'] );
					}
					if ( isset( $mcp_data['mcp_client_version'] ) && is_string( $mcp_data['mcp_client_version'] ) ) {
						$actor['mcp_client_version'] = sanitize_text_field( $mcp_data['mcp_client_version'] );
					}
					if ( ! empty( $actor['mcp_client_name'] ) || ! empty( $actor['mcp_client_version'] ) ) {
						$actor['is_mcp_agent'] = true;
					}
				}
			}
		}

		/**
		 * Filters the actor data attached to sync events.
		 *
		 * Actor data identifies who or what triggered a sync event (user info,
		 * request context, MCP client details, etc.) and is sent alongside every
		 * event to WordPress.com.
		 *
		 * @since 4.33.0
		 *
		 * @param array $actor Associative array of actor information.
		 */
		$actor = apply_filters( 'jetpack_sync_actor_data', $actor );

		// Ensure the filter returns a valid array.
		if ( ! is_array( $actor ) ) {
			$actor = array();
		}

		// Sanitize string values added via the filter.
		foreach ( $actor as $key => $value ) {
			if ( is_string( $value ) ) {
				$actor[ $key ] = sanitize_text_field( $value );
			}
		}

		return $actor;
	}

	/**
	 * Should user data be sent as the actor?
	 *
	 * @param string $current_filter The current WordPress filter being executed.
	 * @return bool
	 */
	public function should_send_user_data_with_actor( $current_filter ) {
		$should_send = in_array( $current_filter, array( 'jetpack_wp_login', 'wp_logout', 'jetpack_valid_failed_login_attempt' ), true );
		/**
		 * Allow or deny sending actor's user data ( IP and UA ) during a sync event
		 *
		 * @since 1.6.3
		 * @since-jetpack 5.8.0
		 *
		 * @module sync
		 *
		 * @param bool True if we should send user data
		 * @param string The current filter that is performing the sync action
		 */
		return apply_filters( 'jetpack_sync_actor_user_data', $should_send, $current_filter );
	}

	/**
	 * Sets Listener defaults.
	 */
	public function set_defaults() {
		$this->sync_queue      = new Queue( 'sync' );
		$this->full_sync_queue = new Queue( 'full_sync' );
		$this->set_queue_size_limit( Settings::get_setting( 'max_queue_size' ) );
		$this->set_queue_lag_limit( Settings::get_setting( 'max_queue_lag' ) );
	}

	/**
	 * Get the request URL.
	 *
	 * @return string Request URL, if known. Otherwise, wp-admin or home_url.
	 */
	public function get_request_url() {
		if ( isset( $_SERVER['HTTP_HOST'] ) && isset( $_SERVER['REQUEST_URI'] ) ) {
			// phpcs:ignore WordPress.Security.ValidatedSanitizedInput -- False positive, sniff misses the call to esc_url_raw.
			return esc_url_raw( 'http' . ( isset( $_SERVER['HTTPS'] ) ? 's' : '' ) . '://' . wp_unslash( "{$_SERVER['HTTP_HOST']}{$_SERVER['REQUEST_URI']}" ) );
		}
		return is_admin() ? get_admin_url( get_current_blog_id() ) : home_url();
	}
}