misc.js

/**
 * Formats the Time to be nicely formatted for printing to the user.
 * @param {*} seconds
 * @returns the formatted time as a string
 */
export function formatTime(seconds) {
    let text = "";

    let secondsLeft = seconds;

    let hours = Math.floor(secondsLeft / 3600);
    secondsLeft -= hours * 3600;

    let minutes = Math.floor(secondsLeft / 60);
    secondsLeft -= minutes * 60;
    secondsLeft = Math.floor(secondsLeft);

    if (hours > 0) {
        text += hours.toString();
        text += ":";
    }

    if (minutes < 10 && hours > 0) {
        text += "0";
    }

    text += minutes.toString();

    text += ":";
    if (secondsLeft < 10) {
        text += "0";
    }

    text += secondsLeft.toString();

    return text;
}

/**
 * Takes a Time String like 2:47 (2min 47) and returns the time in seconds.
 * @param {*} text a string like 2:47 or 1:12:10 (1h, 12min, 10sec)
 */
function parseTimeInput(text) {
    const timeArray = text.split(":");
    let timerSeconds = 0;

    for (let i = 0; i < timeArray.length; i++) {
        let time = timeArray[timeArray.length - 1 - i];
        let timeValue = parseInt(time);

        // Seconds
        if (i == 0) {
            timerSeconds += timeValue;
            // Minutes
        } else if (i == 1) {
            timerSeconds += timeValue * 60;
            // Hours
        } else if (i == 2) {
            timerSeconds += timeValue * 60 * 60;
        }
    }

    return timerSeconds;
}

// Handles colon insertion
function timeInputColonHandler(text) {
    // filter all characters except 0-9
    let numberString = "";

    for (let i = 0; i < text.length; i++) {
        let c = text[i];
        if (c >= '0' && c <= '9') {
            numberString += c;
        }
    }

    let numIndex = 0;
    let finalText = "";
    // After every second number, add a colon
    for (let i = numberString.length - 1; i >= 0; i--) {
        numIndex++;

        if (numIndex == 3) {
            numIndex = 1;
            finalText = ":" + finalText;
        }

        finalText = numberString[i] + finalText;
    }

    return finalText;
}