Files
studysprint/app/(tabs)/timer.tsx
2026-04-24 22:48:43 +02:00

680 lines
20 KiB
TypeScript

import * as Haptics from 'expo-haptics';
import * as React from 'react';
import {
Animated,
Dimensions,
Easing,
StatusBar,
StyleSheet,
Text,
TouchableOpacity,
View
} from 'react-native';
const { width, height } = Dimensions.get('window');
const colors = {
black: '#323F4E',
red: '#F76A6A',
text: '#ffffff',
};
const timers = [...Array(13).keys()].map((i) => (i === 0 ? 1 : i * 5));
const ITEM_SIZE = width * 0.38;
const ITEM_SPACING = (width - ITEM_SIZE) / 2;
const TIMER_UNIT_IN_SECONDS = 60; // Set to 60 for timer value to represent minutes
const HOLD_TO_CANCEL_MS = 2000;
const CANCEL_ANIMATION_DELAY_MS = 250
const placeholderTask = {
name: 'Read chapter 4',
description: 'Focus on the summary questions and write down anything unclear.',
};
function formatTime(totalSeconds: number) {
const minutes = Math.floor(totalSeconds / 60);
const seconds = totalSeconds % 60;
return `${minutes.toString().padStart(2, '0')}:${
seconds.toString().padStart(2, '0')}`;
}
export default function App() {
const [containerHeight, setContainerHeight] = React.useState(0)
const [duration, setDuration] = React.useState(timers[0])
const [timerIsRunning, setIsRunning] = React.useState(false)
const [timeRemaining, setTimeRemaining] = React.useState(0)
const scrollX = React.useRef(new Animated.Value(0)).current;
const timerAnimation = React.useRef(new Animated.Value(0)).current;
const buttonAnimation = React.useRef(new Animated.Value(0)).current;
const taskDetailsAnimation = React.useRef(new Animated.Value(0)).current;
const countdownAnimation = React.useRef(new Animated.Value(0)).current;
const countdownRef = React.useRef<ReturnType<typeof setInterval> | null>(null);
const cancelHoldTimeoutRef = React.useRef<ReturnType<typeof setTimeout> | null>(null);
const runningAnimationRef = React.useRef<Animated.CompositeAnimation | null>(null);
const progressAnimationRef = React.useRef<Animated.CompositeAnimation | null>(null);
const sessionStartedAtRef = React.useRef<number | null>(null);
const sessionDurationMsRef = React.useRef(0);
const cancelButtonAnimation = React.useRef(new Animated.Value(0)).current;
const pressedButtonAnimation = React.useRef(new Animated.Value(0)).current;
const focusModeAnimation = React.useRef(new Animated.Value(0)).current; // 0 = timer inactive, 1 = timer active
const cancelHoldAnimationDelayRef = React.useRef<ReturnType<typeof setTimeout> | null>(null);
const cancelAccelStartedRef = React.useRef(false);
const cancelHoldActiveRef = React.useRef(false);
const cancelHoldIdRef = React.useRef(0);
const cancelHoldStartedAtRef = React.useRef(0);
const cancelOverlayAnimation = React.useRef(new Animated.Value(0)).current;
React.useEffect(() => {
if (containerHeight > 0 && !timerIsRunning) {
timerAnimation.setValue(containerHeight);
}
}, [containerHeight, timerIsRunning, timerAnimation]);
const timerOverlayOpacity = React.useRef(new Animated.Value(1)).current;
const cancelButtonOpacity = cancelButtonAnimation;
const pressedButtonScale = pressedButtonAnimation.interpolate({
inputRange: [0, 1],
outputRange: [1, 0.90],
});
const cancelButtonTranslateY = cancelButtonAnimation.interpolate({
inputRange: [0, 1],
outputRange: [16, 0],
});
const timerOverlayTranslateY = Animated.add(
timerAnimation,
cancelOverlayAnimation
).interpolate({
inputRange: [0, Math.max(containerHeight, 1)],
outputRange: [0, Math.max(containerHeight, 1)],
extrapolate: 'clamp',
});
const countdownTranslateX = focusModeAnimation.interpolate({
inputRange: [0, 1],
outputRange: [0, -width * 0.30],
});
const countdownTranslateY = focusModeAnimation.interpolate({
inputRange: [0, 1],
outputRange: [0, -containerHeight * 0.35],
});
const countdownScale = focusModeAnimation.interpolate({
inputRange: [0, 1],
outputRange: [1, 0.55],
});
const opacity = buttonAnimation.interpolate({
inputRange: [0, 1],
outputRange: [1, 0]
});
const translateY = buttonAnimation.interpolate({
inputRange: [0, 1],
outputRange: [0, 200]
});
const inactiveTimerNumberOpacity = buttonAnimation.interpolate({
inputRange: [0, 1],
outputRange: [1, 0]
});
const taskDetailsOpacity = taskDetailsAnimation.interpolate({
inputRange: [0, 1],
outputRange: [0, 1]
});
const taskDetailsTranslateY = taskDetailsAnimation.interpolate({
inputRange: [0, 1],
outputRange: [20, 0]
});
const animateButtonPress = React.useCallback((pressed: boolean) => {
Animated.timing(pressedButtonAnimation, {
toValue: pressed ? 1 : 0,
duration: pressed ? 80 : 140,
useNativeDriver: true
}).start();
}, [pressedButtonAnimation]);
const cancelTimer = React.useCallback(() => {
if (!timerIsRunning){
return;
}
if (countdownRef.current) {
clearInterval(countdownRef.current);
countdownRef.current = null;
}
runningAnimationRef.current?.stop();
runningAnimationRef.current = null;
progressAnimationRef.current?.stop();
progressAnimationRef.current = null;
cancelOverlayAnimation.stopAnimation();
Animated.parallel([
Animated.timing(cancelButtonAnimation, {
toValue: 0,
duration: 180,
useNativeDriver: true
}),
Animated.timing(taskDetailsAnimation, {
toValue: 0,
duration: 220,
useNativeDriver: true
}),
Animated.timing(focusModeAnimation, {
toValue: 0,
duration: 250,
useNativeDriver: true
}),
Animated.timing(countdownAnimation, {
toValue: 0,
duration: 180,
useNativeDriver: true
}),
Animated.timing(timerAnimation, {
toValue: containerHeight,
duration: 300,
useNativeDriver: true
}),
Animated.timing(timerOverlayOpacity, {
toValue: 0,
duration: 120,
useNativeDriver: true,
}),
Animated.timing(cancelOverlayAnimation, {
toValue: 0,
duration: 120,
useNativeDriver: true,
})
]).start(() => {
Animated.timing(buttonAnimation, {
toValue: 0,
duration: 220,
useNativeDriver: true
})
.start(() => {
timerAnimation.setValue(containerHeight)
cancelOverlayAnimation.setValue(0);
timerOverlayOpacity.setValue(1);
setTimeRemaining(0);
setIsRunning(false);
});
})
}, [timerOverlayOpacity, buttonAnimation, cancelButtonAnimation,
cancelOverlayAnimation, containerHeight, countdownAnimation, timerAnimation,
timerIsRunning, taskDetailsAnimation, focusModeAnimation]);
const startCancelHold = React.useCallback(() => {
animateButtonPress(true);
cancelHoldIdRef.current += 1;
const cancelHoldId = cancelHoldIdRef.current;
cancelHoldActiveRef.current = true;
cancelHoldStartedAtRef.current = Date.now();
cancelAccelStartedRef.current = false;
cancelHoldAnimationDelayRef.current = setTimeout(() => {
cancelHoldAnimationDelayRef.current = null;
if (!cancelHoldActiveRef.current || cancelHoldIdRef.current !== cancelHoldId) {
return;
}
cancelAccelStartedRef.current = true;
cancelOverlayAnimation.setValue(0);
const elapsedHoldMs = Date.now() - cancelHoldStartedAtRef.current;
const remainingHoldMs = Math.max(1, HOLD_TO_CANCEL_MS - elapsedHoldMs);
const sessionStartedAt = sessionStartedAtRef.current ?? Date.now();
const elapsedAtCancelMs = Date.now() + remainingHoldMs - sessionStartedAt;
const expectedProgress = elapsedAtCancelMs / sessionDurationMsRef.current;
const clampedProgress = Math.max(0, Math.min(expectedProgress, 1));
const expectedYAtCancel = containerHeight * clampedProgress;
const cancelOffset = Math.max(0, containerHeight - expectedYAtCancel);
Animated.timing(cancelOverlayAnimation, {
toValue: cancelOffset,
duration: remainingHoldMs,
easing: Easing.in(Easing.quad),
useNativeDriver: true
}).start(({ finished }) => {
if (!finished || cancelHoldIdRef.current !== cancelHoldId) {
return;
}
});
}, CANCEL_ANIMATION_DELAY_MS);
cancelHoldTimeoutRef.current = setTimeout(() => {
cancelHoldActiveRef.current = false;
cancelHoldIdRef.current += 1;
cancelAccelStartedRef.current = false;
Haptics.notificationAsync(Haptics.NotificationFeedbackType.Warning)
cancelTimer();
cancelHoldTimeoutRef.current = null;
}, HOLD_TO_CANCEL_MS);
}, [animateButtonPress, cancelOverlayAnimation, cancelTimer, containerHeight]);
const finishTimer = React.useCallback(() => {
Animated.parallel([
Animated.timing(countdownAnimation, {
toValue: 0,
duration: 200,
useNativeDriver: true
}),
Animated.timing(focusModeAnimation, {
toValue: 0,
duration: 250,
useNativeDriver: true
}),
Animated.timing(taskDetailsAnimation, {
toValue: 0,
duration: 300,
useNativeDriver: true
})
]).start(() => {
Animated.parallel([
Animated.timing(buttonAnimation, {
toValue: 0,
duration: 300,
useNativeDriver: true
}),
Animated.timing(cancelButtonAnimation, {
toValue: 0,
duration: 300,
useNativeDriver: true
}),
]).start(() => {
setIsRunning(false);
/* TODO
Implement store and send of ellapsed time value in seconds to DB
for total time spent statistic
*/
})
})
}, [countdownAnimation, focusModeAnimation, taskDetailsAnimation, buttonAnimation, cancelButtonAnimation]);
const startProgressAnimation = React.useCallback((fromY: number) => {
const elapsedRatio = fromY / containerHeight;
const remainingMs = sessionDurationMsRef.current * (1 - elapsedRatio);
sessionStartedAtRef.current = Date.now() - sessionDurationMsRef.current * elapsedRatio;
timerAnimation.setValue(fromY);
const progressAnimation = Animated.timing(timerAnimation, {
toValue: containerHeight,
duration: remainingMs,
useNativeDriver: true
});
progressAnimationRef.current = progressAnimation;
progressAnimation.start(({ finished }) => {
progressAnimationRef.current = null;
if (!finished) {
return;
}
finishTimer();
});
}, [finishTimer, containerHeight, timerAnimation]);
const stopCancelHold = React.useCallback(() => {
animateButtonPress(false);
cancelHoldActiveRef.current = false;
cancelHoldIdRef.current += 1;
if (cancelHoldTimeoutRef.current) {
clearTimeout(cancelHoldTimeoutRef.current);
cancelHoldTimeoutRef.current = null;
}
if (cancelHoldAnimationDelayRef.current) {
clearTimeout(cancelHoldAnimationDelayRef.current);
cancelHoldAnimationDelayRef.current = null;
}
if (!cancelAccelStartedRef.current) {
return;
}
cancelAccelStartedRef.current = false;
cancelOverlayAnimation.stopAnimation((currentOffset) => {
cancelOverlayAnimation.setValue(currentOffset);
Animated.timing(cancelOverlayAnimation, {
toValue: 0,
duration: 750,
easing: Easing.in(Easing.bounce),
useNativeDriver: true
}).start();
});
}, [animateButtonPress, cancelOverlayAnimation]);
const animation = React.useCallback(() => {
if (timerIsRunning || containerHeight === 0) {
return;
}
Haptics.notificationAsync(Haptics.NotificationFeedbackType.Success)
setIsRunning(true);
taskDetailsAnimation.setValue(0);
countdownAnimation.setValue(0);
cancelOverlayAnimation.setValue(0);
const totalSeconds = duration * TIMER_UNIT_IN_SECONDS;
setTimeRemaining(totalSeconds);
sessionStartedAtRef.current = Date.now();
sessionDurationMsRef.current = totalSeconds * 1000;
if (countdownRef.current) {
clearInterval(countdownRef.current);
countdownRef.current = null;
}
countdownRef.current = setInterval(() => {
setTimeRemaining((currentTime) => {
if (currentTime <= 1) {
if (countdownRef.current) {
clearInterval(countdownRef.current);
countdownRef.current = null;
}
return 0;
}
return currentTime -1;
});
}, 1000);
const runningAnimation = Animated.sequence([
Animated.parallel([
Animated.timing(buttonAnimation, {
toValue: 1,
duration: 300,
useNativeDriver: true
}),
Animated.timing(cancelButtonAnimation, {
toValue: 1,
duration: 300,
useNativeDriver: true
}),
Animated.timing(countdownAnimation, {
toValue: 1,
duration: 300,
useNativeDriver: true
}),
Animated.timing(timerAnimation, {
toValue: 0,
duration: 300,
useNativeDriver: true
}),
]),
Animated.timing(focusModeAnimation, {
toValue: 1,
duration: 450,
useNativeDriver: true
}),
Animated.timing(taskDetailsAnimation, {
toValue: 1,
duration: 500,
useNativeDriver: true
}),
]);
runningAnimationRef.current = runningAnimation;
runningAnimation.start(({ finished }) => {
runningAnimationRef.current = null;
if (!finished) {
return;
}
startProgressAnimation(0);
});
}, [cancelButtonAnimation, countdownAnimation,
buttonAnimation, cancelOverlayAnimation, taskDetailsAnimation,
timerAnimation, focusModeAnimation, duration, timerIsRunning, containerHeight, startProgressAnimation]);
return (
<View style={styles.container}
onLayout={(event) => {
setContainerHeight(event.nativeEvent.layout.height);
}}>
<StatusBar hidden />
<Animated.View
style={[StyleSheet.absoluteFillObject, {
height: containerHeight,
width,
backgroundColor: colors.red,
transform: [{
translateY: timerOverlayTranslateY
}]
}]}
/>
<Animated.View
style={[
StyleSheet.absoluteFillObject,
{
justifyContent: 'flex-end',
alignItems: 'center',
paddingBottom: 100,
opacity,
transform: [{
translateY
}]
},
]}>
<TouchableOpacity
disabled={timerIsRunning}
onPress={animation}
onPressIn={() => animateButtonPress(true)}
onPressOut={() => animateButtonPress(false)}>
<Animated.View style={[styles.roundButton,
{
transform: [{ scale: pressedButtonScale }],
},
]}>
<Text className='text-text-main text-xl'>Start</Text>
<Text className='text-text-main text-xl'>Sprint</Text>
</Animated.View>
</TouchableOpacity>
</Animated.View>
<Animated.View
pointerEvents={timerIsRunning? 'auto' : 'none'}
style={[
styles.cancelButtonContainer,
{
opacity: cancelButtonOpacity,
transform: [{translateY: cancelButtonTranslateY}],
},
]}>
<TouchableOpacity
onPressIn={startCancelHold}
onPressOut={stopCancelHold}>
<Animated.View style={[styles.cancelButton,
{
transform: [{ scale: pressedButtonScale }],
},
]}
>
<Text className='text-text-main text-xl'>Hold to end sprint</Text>
</Animated.View>
</TouchableOpacity>
</Animated.View>
<Animated.View
pointerEvents= 'none'
style={[
styles.countdownOverlay, {
opacity: countdownAnimation,
transform: [
{translateX: countdownTranslateX},
{translateY: countdownTranslateY},
{scale: countdownScale},
],
},
]}
>
<Text style= {styles.countdownText}>{formatTime(timeRemaining)}</Text>
</Animated.View>
<View
style={{
position: 'absolute',
top: containerHeight / 3,
left: 0,
right: 0,
flex: 1,
}}>
<Animated.FlatList
data={timers}
scrollEnabled={!timerIsRunning}
keyExtractor={item => item.toString()}
horizontal
bounces={false}
onScroll={Animated.event(
[{nativeEvent: {contentOffset: {x: scrollX}}}],
{ useNativeDriver: true}
)}
showsHorizontalScrollIndicator={false}
onMomentumScrollEnd={ev => {
if (timerIsRunning) {
return;
}
const index = Math.round(ev.nativeEvent.contentOffset.x / ITEM_SIZE);
const clampedIndex = Math.max(0, Math.min(index, timers.length - 1));
setDuration(timers[clampedIndex]);
}}
snapToInterval={ITEM_SIZE}
decelerationRate={"fast"}
style={{flexGrow: 0}}
contentContainerStyle={{
paddingHorizontal: ITEM_SPACING
}}
renderItem={({item, index}) => {
const timerText = item;
const inputRange = [
(index - 1) * ITEM_SIZE,
index * ITEM_SIZE,
(index + 1) * ITEM_SIZE,
]
const normalOpacity = scrollX.interpolate({
inputRange,
outputRange: [.4, 1, .4]
})
const opacity = Animated.multiply(normalOpacity, inactiveTimerNumberOpacity);
const scale = scrollX.interpolate({
inputRange,
outputRange: [.7, 1, .7]
})
return <View style={{width: ITEM_SIZE, justifyContent: 'center', alignItems: 'center'}}>
<Animated.Text style={[styles.text, {
opacity,
transform: [{
scale
}]
}]}>
{timerText}
</Animated.Text>
</View>
}
}
/>
</View>
<Animated.View
pointerEvents="none"
style={[
styles.taskDetails,
{
opacity: taskDetailsOpacity,
transform: [{
translateY: taskDetailsTranslateY
}]
}
]}>
<Text style={styles.taskName}>{placeholderTask.name}</Text>
<Text style={styles.taskDescription}>{placeholderTask.description}</Text>
</Animated.View>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: colors.black,
},
roundButton: {
width: 80,
height: 80,
borderRadius: 80,
backgroundColor: '#beb9a7',
alignItems: 'center',
justifyContent: 'center',
},
text: {
fontSize: ITEM_SIZE * 0.8,
fontFamily: 'Menlo',
color: colors.text,
fontWeight: '900',
},
taskDetails: {
position: 'absolute',
top: height * 0.34,
left: 32,
right: 32,
alignItems: 'center',
},
taskName: {
color: colors.text,
fontSize: 32,
fontWeight: '800',
textAlign: 'center',
},
taskDescription: {
color: colors.text,
fontSize: 24,
lineHeight: 32,
marginTop: 20,
textAlign: 'center',
},
countdownText: {
fontSize: ITEM_SIZE * 0.32,
fontFamily: 'Menlo',
color: colors.text,
fontWeight: '900',
textAlign: 'center',
},
cancelButtonContainer: {
position: 'absolute',
left: 0,
right: 0,
bottom: 44,
alignItems: 'center',
zIndex: 2,
},
cancelButton: {
minWidth: 112,
height: 44,
borderRadius: 22,
borderWidth: 1,
borderColor: 'rgba(155, 155, 155, 0.35)',
backgroundColor: '#beb9a7',
alignItems: 'center',
justifyContent: 'center',
paddingHorizontal: 22,
position: 'relative',
overflow: 'hidden',
},
countdownOverlay: {
position: 'absolute',
top: height / 3,
left: 0,
right: 0,
alignItems: 'center',
},
});