jellyfin-web/src/libraries/screensavermanager.js

define(['events', 'playbackManager', 'pluginManager', 'inputManager', 'connectionManager', 'userSettings'], function (events, playbackManager, pluginManager, inputManager, connectionManager, userSettings) {
    'use strict';

    playbackManager = playbackManager.default || playbackManager;

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

    var lastFunctionalEvent = 0;

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

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

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

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

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

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

        return null;
    }

    function ScreenSaverManager() {
        var self = this;
        var 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);
        }

        self.isShowing = function () {
            return activeScreenSaver != null;
        };

        self.show = function () {
            var isLoggedIn;
            var apiClient = connectionManager.currentApiClient();

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

            var screensaver = getScreensaverPlugin(isLoggedIn);

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

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

        function onInterval() {
            if (self.isShowing()) {
                return;
            }

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

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

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

            self.show();
        }

        setInterval(onInterval, 10000);
    }

    return new ScreenSaverManager();
});