mattermost-mobile/app/screens/reaction_list/reaction_header.js

// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

import PropTypes from 'prop-types';
import React, {PureComponent} from 'react';
import {
    Animated,
    Platform,
    ScrollView,
} from 'react-native';
import {NativeViewGestureHandler} from 'react-native-gesture-handler';

import {makeStyleSheetFromTheme} from '@utils/theme';

import ReactionHeaderItem from './reaction_header_item';

export default class ReactionHeader extends PureComponent {
    static propTypes = {
        forwardedRef: PropTypes.object,
        selected: PropTypes.string.isRequired,
        onSelectReaction: PropTypes.func.isRequired,
        reactions: PropTypes.array.isRequired,
        theme: PropTypes.object.isRequired,
    };

    handleOnPress = (emoji) => {
        this.props.onSelectReaction(emoji);
    };

    renderReactionHeaderItems = () => {
        const {selected, reactions, theme} = this.props;

        return reactions.map((reaction) => (
            <ReactionHeaderItem
                key={reaction.name}
                count={reaction.count}
                emojiName={reaction.name}
                highlight={selected === reaction.name}
                onPress={this.handleOnPress}
                theme={theme}
            />
        ));
    };

    render() {
        const {theme} = this.props;
        const style = getStyleSheet(theme);

        return (
            <NativeViewGestureHandler
                ref={this.props.forwardedRef}
            >
                <Animated.View style={style.container}>
                    <ScrollView
                        alwaysBounceHorizontal={false}
                        horizontal={true}
                        overScrollMode='never'
                    >
                        {this.renderReactionHeaderItems()}
                    </ScrollView>
                </Animated.View>
            </NativeViewGestureHandler>
        );
    }
}

const getStyleSheet = makeStyleSheetFromTheme((theme) => {
    return {
        container: {
            backgroundColor: theme.centerChannelBg,
            height: 36.5,
            paddingHorizontal: 0,
            width: '100%',
            maxWidth: 450,
            ...Platform.select({
                android: {
                    borderTopRightRadius: 2,
                    borderTopLeftRadius: 2,
                },
                ios: {
                    borderTopRightRadius: 10,
                    borderTopLeftRadius: 10,
                },
            }),
        },
    };
});