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London | 26-ITP-May | Chun Yan Wong | Sprint 3 | oAlarmclock #1368

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London | 26-ITP-May | Chun Yan Wong | Sprint 3 | oAlarmclock #1368

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35fceee
Fix console log to access houseNumber in address object
cywong-dev Jul 29, 2026
9394322
Fix iteration over author object
cywong-dev Jul 29, 2026
637ccab
Fix access method for house number in address object
cywong-dev Jul 29, 2026
b7494f7
Fix iteration method for author object
cywong-dev Jul 29, 2026
42e07b8
Change title to 'Alarm clock app'
cywong-dev Aug 3, 2026
0a19a38
Implement countdown timer and alarm functionality
cywong-dev Aug 3, 2026
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2 changes: 1 addition & 1 deletion Sprint-2/debug/author.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,5 +12,5 @@ const author = {
};

for (const value of author) {
console.log(value);
console.log(value);
}
133 changes: 133 additions & 0 deletions Sprint-3/alarmclock/alarmclock.js
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
/*
function setAlarm() {}

// DO NOT EDIT BELOW HERE
Expand All @@ -23,3 +24,135 @@ function pauseAlarm() {
}

window.onload = setup;
*/


let countdownInterval = null;
let flashInterval = null;
let timeRemaining = 0;
let isPaused = false;

function formatTime(totalSeconds) {
const minutes = Math.floor(totalSeconds / 60);
const seconds = totalSeconds % 60;

const padMinutes = String(minutes).padStart(2, "0");
const padSeconds = String(seconds).padStart(2, "0");

return `${padMinutes}:${padSeconds}`;
}

function updateDisplay() {
const timeRemainingElement = document.getElementById("timeRemaining");
if (timeRemainingElement) {
timeRemainingElement.innerText = `Time Remaining: ${formatTime(timeRemaining)}`;
}
}

function startFlashingBackground() {
let isRed = false;
flashInterval = setInterval(() => {
document.body.style.backgroundColor = isRed ? "#ffffff" : "#ff4d4d";
isRed = !isRed;
}, 500);
}

function stopFlashingBackground() {
if (flashInterval) {
clearInterval(flashInterval);
flashInterval = null;
}
document.body.style.backgroundColor = "";
}

function setAlarm() {
const alarmInput = document.getElementById("alarmSet");

// If currently paused, resume countdown
if (isPaused) {
isPaused = false;
startCountdown();
return;
}

// If an active alarm is already running, toggle pause state
if (countdownInterval !== null) {
isPaused = true;
clearInterval(countdownInterval);
countdownInterval = null;
return;
}

// Read time from input field
const inputSeconds = parseInt(alarmInput.value, 10);
if (isNaN(inputSeconds) || inputSeconds <= 0) {
alert("Please enter a valid number of seconds.");
return;
}

timeRemaining = inputSeconds;
stopFlashingBackground();
updateDisplay();
startCountdown();
}

function startCountdown() {
// Clear any existing timer before starting a new one
if (countdownInterval) {
clearInterval(countdownInterval);
}

countdownInterval = setInterval(() => {
timeRemaining -= 1;
updateDisplay();

if (timeRemaining <= 0) {
clearInterval(countdownInterval);
countdownInterval = null;
playAlarm();
startFlashingBackground();
}
}, 1000);
}

// Override pauseAlarm to also clear screen effects and reset timers
const originalPauseAlarm = pauseAlarm;
pauseAlarm = function () {
if (typeof originalPauseAlarm === "function") {
originalPauseAlarm();
} else {
audio.pause();
}

// Reset state
if (countdownInterval) {
clearInterval(countdownInterval);
countdownInterval = null;
}
isPaused = false;
stopFlashingBackground();
};

// DO NOT EDIT BELOW HERE

var audio = new Audio("alarmsound.mp3");

function setup() {
document.getElementById("set").addEventListener("click", () => {
setAlarm();
});

document.getElementById("stop").addEventListener("click", () => {
pauseAlarm();
});
}

function playAlarm() {
audio.play();
}

function pauseAlarm() {
audio.pause();
}

window.onload = setup;
2 changes: 1 addition & 1 deletion Sprint-3/alarmclock/index.html
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Expand Up @@ -4,7 +4,7 @@
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" href="style.css" />
<title>Title here</title>
<title>Alarm clock app</title>
</head>
<body>
<div class="centre">
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