pub async fn command() -> Result<(), String> {

    trace!("Running 'watch' command.");

    let (tx, rx) = std::sync::mpsc::channel();

    let steam = Steam::new();

    trace!("Detected localconfig @ {}.", &steam.localconfig);

    trace!("Updating launch options for startup.");

    let app_ids = steam.app_ids().unwrap_or_default();

    steam.update_all_launch_options(app_ids, map_launch_options());

    trace!("Starting the watch service...");

    let mut debouncer =

        new_debouncer(Duration::from_secs(2), None, tx).map_err(|e| e.to_string())?;

    debouncer

        .watcher()

        .watch(Path::new(&steam.localconfig), RecursiveMode::NonRecursive)

        .unwrap();

    let mut previous_hash = steam.get_hash();

    trace!("Launch service started!");

    for result in rx {

        match result {

                info!("Checking for changes...");

                let current_hash = steam.get_hash();

                if previous_hash == current_hash {

                    info!("No changes detected, skipping...");

                    info!("Changes detected!");

                    previous_hash = current_hash;

                    info!("Verifying all apps contain the launch options...");

                    let app_ids = steam.app_ids().unwrap_or_default();

                    steam.update_all_launch_options(app_ids, map_launch_options());

                    info!("All apps were updated successfully!");

            Err(error) => log::info!("Error {error:?}"),

    Ok(())

}

fn map_launch_options() -> Box<dyn Fn(Option<String>) -> String> {

    return Box::new(move |launch_options| {

        let launch_options = launch_options.unwrap_or_default();

        let command = "protontweaks %command%";

        if launch_options.contains(command) {

            return launch_options;

        }

        if launch_options.contains("%command%") {

            return launch_options.replace("%command%", command);

        }

        if launch_options.trim() == "" {

            return command.to_string();

        }

        launch_options + " " + command

    });

}