jellyfin-web/src/libraries/screensavermanager.js

import events from 'events';
import playbackManager from 'playbackManager';
import pluginManager from 'pluginManager';
import inputManager from 'inputManager';
import connectionManager from 'connectionManager';
import * as userSettings from 'userSettings';

function getMinIdleTime() {
    // Returns the minimum amount of idle time required before the screen saver can be displayed
    //time units used Millisecond
    return 180000;
}

let lastFunctionalEvent = 0;

function getFunctionalEventIdleTime() {
    return new Date().getTime() - lastFunctionalEvent;
}

events.on(playbackManager, 'playbackstop', function (e, stopInfo) {
    const state = stopInfo.state;
    if (state.NowPlayingItem && state.NowPlayingItem.MediaType == 'Video') {
        lastFunctionalEvent = new Date().getTime();
    }
});

function getScreensaverPlugin(isLoggedIn) {
    let option;
    try {
        option = userSettings.get('screensaver', false);
    } catch (err) {
        option = isLoggedIn ? 'backdropscreensaver' : 'logoscreensaver';
    }

    const plugins = pluginManager.ofType('screensaver');

    for (let i = 0, length = plugins.length; i < length; i++) {
        const plugin = plugins[i];

        if (plugin.id === option) {
            return plugin;
        }
    }

    return null;
}

function ScreenSaverManager() {
    let activeScreenSaver;

    function showScreenSaver(screensaver) {
        if (activeScreenSaver) {
            throw new Error('An existing screensaver is already active.');
        }

        console.debug('Showing screensaver ' + screensaver.name);

        screensaver.show();
        activeScreenSaver = screensaver;

        if (screensaver.hideOnClick !== false) {
            window.addEventListener('click', hide, true);
        }
        if (screensaver.hideOnMouse !== false) {
            window.addEventListener('mousemove', hide, true);
        }
        if (screensaver.hideOnKey !== false) {
            window.addEventListener('keydown', hide, true);
        }
    }

    function hide() {
        if (activeScreenSaver) {
            console.debug('Hiding screensaver');
            activeScreenSaver.hide();
            activeScreenSaver = null;
        }

        window.removeEventListener('click', hide, true);
        window.removeEventListener('mousemove', hide, true);
        window.removeEventListener('keydown', hide, true);
    }

    this.isShowing = () => {
        return activeScreenSaver != null;
    };

    this.show = function () {
        let isLoggedIn;
        const apiClient = connectionManager.currentApiClient();

        if (apiClient && apiClient.isLoggedIn()) {
            isLoggedIn = true;
        }

        const screensaver = getScreensaverPlugin(isLoggedIn);

        if (screensaver) {
            showScreenSaver(screensaver);
        }
    };

    this.hide = function () {
        hide();
    };

    const onInterval = () => {
        if (this.isShowing()) {
            return;
        }

        if (inputManager.idleTime() < getMinIdleTime()) {
            return;
        }

        if (getFunctionalEventIdleTime < getMinIdleTime()) {
            return;
        }

        if (playbackManager.isPlayingVideo()) {
            return;
        }

        this.show();
    };

    setInterval(onInterval, 10000);
}

export default new ScreenSaverManager;