projector-clock/clock.js at main · vkuhlmann/projector-clock · GitHub

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"use strict";


let clockUpdateLoop;
let isShowSeconds;
let clockEvents;
clockEvents = {};

let lastEventCheckTime = "";

function checkForClockEvents() {
    let d = new Date();
    let timeString = pad(d.getHours(), 2) + ":"
        + pad(d.getMinutes(), 2) + ":" + pad(d.getSeconds(), 2);
    let eventEntries = Object.entries(clockEvents).sort((a, b) => (a > b) ? 1 : ((a < b) ? -1 : 0));
    let i = 0;
    for (; i < eventEntries.length; i++) {
        if (eventEntries[i][0] > lastEventCheckTime)
            break;
    }

    for (; i < eventEntries.length; i++) {
        if (eventEntries[i][0] > timeString)
            break;
        eventEntries[i][1]();
    }
    lastEventCheckTime = timeString;
}

function updateClock() {
    let d = new Date();
    let timeString = pad(d.getHours(), 2) + ":"
        + pad(d.getMinutes(), 2);
    if (isShowSeconds) {
        timeString += ":" + pad(d.getSeconds(), 2);
    }

    $("#clockValue")[0].innerText = timeString;
    checkForClockEvents();
}

function setClockFontsize(points) {
    $("#clockValue")[0].style.fontSize = `${points}pt`;
}

function startClock() {
    stopClock();
    clockUpdateLoop = setInterval(updateClock, 200);
}

function stopClock() {
    if (clockUpdateLoop != null) {
        clearInterval(clockUpdateLoop);
        clockUpdateLoop = null;
    }
}

function showSeconds() {
    isShowSeconds = true;
}

function hideSeconds() {
    isShowSeconds = false;
}