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Migrate FloatingMessageCounter to function component #22912

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merged 2 commits into from
Aug 1, 2023
Merged

Migrate FloatingMessageCounter to function component #22912

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77e3595
Migrate FloatingMessageCounter to function component
AGarciaNY Jul 14, 2023
aa582d8
improved FloatingMessageCounter performance by using useCallback
AGarciaNY Jul 16, 2023
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108 changes: 50 additions & 58 deletions src/pages/home/report/FloatingMessageCounter/index.js
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import React, {PureComponent} from 'react';
import React, {useEffect, useMemo, useCallback} from 'react';
import {Animated, View} from 'react-native';
import PropTypes from 'prop-types';
import styles from '../../../../styles/styles';
Expand All @@ -7,7 +7,7 @@ import Text from '../../../../components/Text';
import Icon from '../../../../components/Icon';
import * as Expensicons from '../../../../components/Icon/Expensicons';
import themeColors from '../../../../styles/themes/default';
import withLocalize, {withLocalizePropTypes} from '../../../../components/withLocalize';
import useLocalize from '../../../../hooks/useLocalize';
import FloatingMessageCounterContainer from './FloatingMessageCounterContainer';

const propTypes = {
Expand All @@ -16,8 +16,6 @@ const propTypes = {

/** Callback to be called when user clicks the New Messages indicator */
onClick: PropTypes.func,

...withLocalizePropTypes,
};

const defaultProps = {
Expand All @@ -28,73 +26,67 @@ const defaultProps = {
const MARKER_INACTIVE_TRANSLATE_Y = -40;
const MARKER_ACTIVE_TRANSLATE_Y = 10;

class FloatingMessageCounter extends PureComponent {
constructor(props) {
super(props);
this.translateY = new Animated.Value(MARKER_INACTIVE_TRANSLATE_Y);
this.show = this.show.bind(this);
this.hide = this.hide.bind(this);
}

componentDidUpdate() {
if (this.props.isActive) {
this.show();
} else {
this.hide();
}
}
function FloatingMessageCounter(props) {
const {translate} = useLocalize();
const translateY = useMemo(() => new Animated.Value(MARKER_INACTIVE_TRANSLATE_Y), []);

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Note to self: This will calculate the value only once i.e. on mount.

show() {
Animated.spring(this.translateY, {
const show = useCallback(() => {
Animated.spring(translateY, {
toValue: MARKER_ACTIVE_TRANSLATE_Y,
duration: 80,
useNativeDriver: true,
}).start();
}
}, [translateY]);

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translateY will never change, right? Why is it in the dependency array?

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When running npm run lint it gives me a warning that useCallback is missing a dependency translateY. It suggests adding it or removing the dependency array. When I remove the dependency array and run lint again it tells me to add an array. I kept translateY as a dependency to keep lint happy 😅.

Would it be best to use something else other than useCallback

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no, this is fine the.

hide() {
Animated.spring(this.translateY, {
const hide = useCallback(() => {
Animated.spring(translateY, {
toValue: MARKER_INACTIVE_TRANSLATE_Y,
duration: 80,
useNativeDriver: true,
}).start();
}
}, [translateY]);

render() {
return (
<FloatingMessageCounterContainer
accessibilityHint={this.props.translate('accessibilityHints.scrollToNewestMessages')}
containerStyles={[styles.floatingMessageCounterTransformation(this.translateY)]}
>
<View style={styles.floatingMessageCounter}>
<View style={[styles.flexRow, styles.justifyContentBetween, styles.alignItemsCenter]}>
<Button
success
small
onPress={this.props.onClick}
>
<View style={[styles.flexRow, styles.alignItemsCenter]}>
<Icon
small
src={Expensicons.DownArrow}
fill={themeColors.textLight}
/>
<Text
selectable={false}
style={[styles.ml2, styles.buttonSmallText, styles.textWhite]}
>
{this.props.translate('newMessages')}
</Text>
</View>
</Button>
</View>
useEffect(() => {
if (props.isActive) {
show();
} else {
hide();
}
}, [props.isActive, show, hide]);

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looks good

return (
<FloatingMessageCounterContainer
accessibilityHint={translate('accessibilityHints.scrollToNewestMessages')}
containerStyles={[styles.floatingMessageCounterTransformation(translateY)]}
>
<View style={styles.floatingMessageCounter}>
<View style={[styles.flexRow, styles.justifyContentBetween, styles.alignItemsCenter]}>
<Button
success
small
onPress={props.onClick}
>
<View style={[styles.flexRow, styles.alignItemsCenter]}>
<Icon
small
src={Expensicons.DownArrow}
fill={themeColors.textLight}
/>
<Text
selectable={false}
style={[styles.ml2, styles.buttonSmallText, styles.textWhite]}
>
{translate('newMessages')}
</Text>
</View>
</Button>
</View>
</FloatingMessageCounterContainer>
);
}
</View>
</FloatingMessageCounterContainer>
);
}

FloatingMessageCounter.propTypes = propTypes;
FloatingMessageCounter.defaultProps = defaultProps;

export default withLocalize(FloatingMessageCounter);
FloatingMessageCounter.displayName = 'FloatingMessageCounter';
export default React.memo(FloatingMessageCounter);
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