$response_body );
		$data = json_decode( $json, true );

		if ( empty( $data ) ) {
			$message = $data === null ? 'Invalid JSON' : 'Empty JSON';

			wpforms_log(
				'Cached data: ' . $message,
				[
					'class'          => static::class,
					'cache_file'     => $this->settings['cache_file'],
					'remote_source'  => $this->settings['remote_source'],
					'json_result'    => $message,
					'code'           => $response_code,
					'headers'        => $response_headers,
					'content_length' => $response_body_len,
					'body'           => $response_body_log,
				],
				[
					'type' => [ 'error' ],
				]
			);

			return [];
		}

		return $this->prepare_cache_data( $data );
	}

	/**
	 * Schedule updates.
	 *
	 * @since 1.6.8
	 */
	public function schedule_update_cache() {

		// Just skip if not need to register scheduled action.
		if ( empty( $this->settings['update_action'] ) ) {
			return;
		}

		$tasks = wpforms()->get( 'tasks' );

		if (
			! $tasks instanceof Tasks ||
			$tasks->is_scheduled( $this->settings['update_action'] ) !== false
		) {
			return;
		}

		$tasks->create( $this->settings['update_action'] )
			->recurring( time() + $this->settings['cache_ttl'], $this->settings['cache_ttl'] )
			->params()
			->register();
	}

	/**
	 * Complete the cache directory.
	 *
	 * @since 1.6.8
	 */
	public function cache_dir_complete() {

		if ( ! $this->updated ) {
			return;
		}

		wpforms_create_upload_dir_htaccess_file();
		wpforms_create_cache_dir_htaccess_file();
		wpforms_create_index_html_file( $this->cache_dir );
		wpforms_create_index_php_file( $this->cache_dir );
	}

	/**
	 * Invalidate cache.
	 *
	 * @since 1.8.7
	 */
	public function invalidate_cache() {

		Transient::delete( $this->cache_key );
	}

	/**
	 * Prepare data to store in a local cache.
	 *
	 * @since 1.6.8
	 *
	 * @param array|mixed $data Raw data received by the remote request.
	 *
	 * @return array Prepared data for caching.
	 */
	protected function prepare_cache_data( $data ): array {

		if ( empty( $data ) || ! is_array( $data ) ) {
			return [];
		}

		return $data;
	}

	/**
	 * Maybe update transient duration time.
	 *
	 * Allows updating transient duration time if it's less than expiration time.
	 * To do this, overwrite this method in child classes.
	 *
	 * @since 1.8.7
	 *
	 * @param array $data Data received by the remote request.
	 *
	 * @return bool|array
	 */
	protected function maybe_update_transient( array $data ) {

		return $data;
	}
}