Rocket.Chat.ReactNative/app/views/RoomView/Banner.js

import React, { useState } from 'react';
import { Text, View } from 'react-native';
import PropTypes from 'prop-types';
import { BorderlessButton, ScrollView } from 'react-native-gesture-handler';
import Modal from 'react-native-modal';

import Markdown, { MarkdownPreview } from '../../containers/markdown';
import { CustomIcon } from '../../lib/Icons';
import { themes } from '../../constants/colors';
import styles from './styles';

const Banner = React.memo(
	({ text, title, theme, bannerClosed, closeBanner }) => {
		const [showModal, openModal] = useState(false);

		const toggleModal = () => openModal(prevState => !prevState);

		if (text && !bannerClosed) {
			return (
				<>
					<BorderlessButton
						style={[styles.bannerContainer, { backgroundColor: themes[theme].bannerBackground }]}
						testID='room-view-banner'
						onPress={toggleModal}>
						<MarkdownPreview msg={text} style={[styles.bannerText]} />
						<BorderlessButton onPress={closeBanner}>
							<CustomIcon color={themes[theme].auxiliaryText} name='close' size={20} />
						</BorderlessButton>
					</BorderlessButton>
					<Modal
						onBackdropPress={toggleModal}
						onBackButtonPress={toggleModal}
						useNativeDriver
						isVisible={showModal}
						animationIn='fadeIn'
						animationOut='fadeOut'>
						<View style={[styles.modalView, { backgroundColor: themes[theme].bannerBackground }]}>
							<Text style={[styles.bannerModalTitle, { color: themes[theme].auxiliaryText }]}>{title}</Text>
							<ScrollView style={styles.modalScrollView}>
								<Markdown msg={text} theme={theme} />
							</ScrollView>
						</View>
					</Modal>
				</>
			);
		}

		return null;
	},
	(prevProps, nextProps) =>
		prevProps.text === nextProps.text && prevProps.theme === nextProps.theme && prevProps.bannerClosed === nextProps.bannerClosed
);

Banner.propTypes = {
	text: PropTypes.string,
	title: PropTypes.string,
	theme: PropTypes.string,
	bannerClosed: PropTypes.bool,
	closeBanner: PropTypes.func
};

export default Banner;