function initUiObservers(store, _router) {
    let keyHistory = [];

    document.addEventListener('keypress', (event) => {
        if (event.target.tagName === 'INPUT') {
            return;
        }

        keyHistory = keyHistory
            .concat({
                key: event.key,
                time: new Date().getTime(),
            })
            .slice(-3);

        if (keyHistory.length === 3
            && keyHistory.every(input => input.key === 's')
            && new Date().getTime() - keyHistory[0].time < 1000
        ) {
            store.dispatch('setSfw', false);
            return;
        }

        if (event.key === 's') {
            store.dispatch('setSfw', true);
        }
    });
}

export default initUiObservers;