Rocket.Chat.ReactNative/app/presentation/RoomItem/index.js

import React from 'react';
import PropTypes from 'prop-types';
import { View, Text, Animated } from 'react-native';
import { RectButton, PanGestureHandler, State } from 'react-native-gesture-handler';

import Avatar from '../../containers/Avatar';
import I18n from '../../i18n';
import styles, {
	ROW_HEIGHT, ACTION_WIDTH, SMALL_SWIPE, LONG_SWIPE
} from './styles';
import UnreadBadge from './UnreadBadge';
import TypeIcon from './TypeIcon';
import LastMessage from './LastMessage';
import { capitalize, formatDate } from '../../utils/room';
import { LeftActions, RightActions } from './Actions';

export { ROW_HEIGHT };

const attrs = ['name', 'unread', 'userMentions', 'showLastMessage', 'alert', 'type', 'width', 'isRead', 'favorite'];

export default class RoomItem extends React.Component {
	static propTypes = {
		type: PropTypes.string.isRequired,
		name: PropTypes.string.isRequired,
		baseUrl: PropTypes.string.isRequired,
		showLastMessage: PropTypes.bool,
		_updatedAt: PropTypes.string,
		lastMessage: PropTypes.object,
		alert: PropTypes.bool,
		unread: PropTypes.number,
		userMentions: PropTypes.number,
		id: PropTypes.string,
		prid: PropTypes.string,
		onPress: PropTypes.func,
		userId: PropTypes.string,
		username: PropTypes.string,
		token: PropTypes.string,
		avatarSize: PropTypes.number,
		testID: PropTypes.string,
		width: PropTypes.number,
		favorite: PropTypes.bool,
		isRead: PropTypes.bool,
		rid: PropTypes.string,
		toggleFav: PropTypes.func,
		toggleRead: PropTypes.func,
		hideChannel: PropTypes.func
	}

	static defaultProps = {
		avatarSize: 48
	}

	// Making jest happy: https://github.com/facebook/react-native/issues/22175
	// eslint-disable-next-line no-useless-constructor
	constructor(props) {
		super(props);
		this.dragX = new Animated.Value(0);
		this.rowOffSet = new Animated.Value(0);
		this.transX = Animated.add(
			this.rowOffSet,
			this.dragX
		);
		this.state = {
			rowState: 0 // 0: closed, 1: right opened, -1: left opened
		};
		this._onGestureEvent = Animated.event(
			[{ nativeEvent: { translationX: this.dragX } }]
		);
		this._value = 0;
	}

	shouldComponentUpdate(nextProps) {
		const { lastMessage, _updatedAt } = this.props;
		const oldlastMessage = lastMessage;
		const newLastmessage = nextProps.lastMessage;

		if (oldlastMessage && newLastmessage && oldlastMessage.ts !== newLastmessage.ts) {
			return true;
		}
		if (_updatedAt && nextProps._updatedAt && nextProps._updatedAt.toISOString() !== _updatedAt.toISOString()) {
			return true;
		}
		// eslint-disable-next-line react/destructuring-assignment
		return attrs.some(key => nextProps[key] !== this.props[key]);
	}

	_onHandlerStateChange = ({ nativeEvent }) => {
		if (nativeEvent.oldState === State.ACTIVE) {
			this._handleRelease(nativeEvent);
		}
	};

	_handleRelease = (nativeEvent) => {
		const { translationX } = nativeEvent;
		const { rowState } = this.state;
		this._value = this._value + translationX;

		let toValue = 0;
		if (rowState === 0) { // if no option is opened
			if (translationX > 0 && translationX < LONG_SWIPE) {
				toValue = ACTION_WIDTH; // open left option if he swipe right but not enough to trigger action
				this.setState({ rowState: -1 });
			} else if (translationX >= LONG_SWIPE) {
				toValue = 0;
				this.toggleRead();
			} else if (translationX < 0 && translationX > -LONG_SWIPE) {
				toValue = -2 * ACTION_WIDTH; // open right option if he swipe left
				this.setState({ rowState: 1 });
			} else if (translationX <= -LONG_SWIPE) {
				toValue = 0;
				this.setState({ rowState: 0 });
				this.hideChannel();
			} else {
				toValue = 0;
			}
		}

		if (rowState === -1) { // if left option is opened
			if (this._value < SMALL_SWIPE) {
				toValue = 0;
				this.setState({ rowState: 0 });
			} else if (this._value > LONG_SWIPE) {
				toValue = 0;
				this.setState({ rowState: 0 });
				this.toggleRead();
			} else {
				toValue = ACTION_WIDTH;
			}
		}

		if (rowState === 1) { // if right option is opened
			if (this._value > -2 * SMALL_SWIPE) {
				toValue = 0;
				this.setState({ rowState: 0 });
			} else if (this._value < -LONG_SWIPE) {
				toValue = 0;
				this.setState({ rowState: 0 });
				this.hideChannel();
			} else {
				toValue = -2 * ACTION_WIDTH;
			}
		}
		this._animateRow(toValue);
	}

	_animateRow = (toValue) => {
		this.rowOffSet.setValue(this._value);
		this._value = toValue;
		this.dragX.setValue(0);
		Animated.spring(this.rowOffSet, {
			toValue,
			bounciness: 0,
			useNativeDriver: true
		}).start();
	}

	close = () => {
		this.setState({ rowState: 0 });
		this._animateRow(0);
	}

	toggleFav = () => {
		const { toggleFav, rid, favorite } = this.props;
		if (toggleFav) {
			toggleFav(rid, favorite);
		}
		this.close();
	}

	toggleRead = () => {
		const { toggleRead, rid, isRead } = this.props;
		if (toggleRead) {
			toggleRead(rid, isRead);
		}
	}

	hideChannel = () => {
		const { hideChannel, rid, type } = this.props;
		if (hideChannel) {
			hideChannel(rid, type);
		}
	}

	onToggleReadPress = () => {
		this.toggleRead();
		this.close();
	}

	onHidePress = () => {
		this.hideChannel();
		this.close();
	}

	onPress = () => {
		const { rowState } = this.state;
		if (rowState !== 0) {
			this.close();
			return;
		}
		const { onPress } = this.props;
		if (onPress) {
			onPress();
		}
	}

	render() {
		const {
			unread, userMentions, name, _updatedAt, alert, testID, type, avatarSize, baseUrl, userId, username, token, id, prid, showLastMessage, lastMessage, isRead, width, favorite
		} = this.props;

		const date = formatDate(_updatedAt);

		let accessibilityLabel = name;
		if (unread === 1) {
			accessibilityLabel += `, ${ unread } ${ I18n.t('alert') }`;
		} else if (unread > 1) {
			accessibilityLabel += `, ${ unread } ${ I18n.t('alerts') }`;
		}

		if (userMentions > 0) {
			accessibilityLabel += `, ${ I18n.t('you_were_mentioned') }`;
		}

		if (date) {
			accessibilityLabel += `, ${ I18n.t('last_message') } ${ date }`;
		}

		return (
			<PanGestureHandler
				minDeltaX={20}
				onGestureEvent={this._onGestureEvent}
				onHandlerStateChange={this._onHandlerStateChange}
			>
				<Animated.View>
					<LeftActions
						transX={this.transX}
						isRead={isRead}
						width={width}
						onToggleReadPress={this.onToggleReadPress}
					/>
					<RightActions
						transX={this.transX}
						favorite={favorite}
						width={width}
						toggleFav={this.toggleFav}
						onHidePress={this.onHidePress}
					/>
					<Animated.View
						style={
							{
								transform: [{ translateX: this.transX }]
							}
						}
					>
						<RectButton
							onPress={this.onPress}
							activeOpacity={0.8}
							underlayColor='#e1e5e8'
							testID={testID}
							style={styles.button}
						>
							<View
								style={styles.container}
								accessibilityLabel={accessibilityLabel}
							>
								<Avatar text={name} size={avatarSize} type={type} baseUrl={baseUrl} style={styles.avatar} userId={userId} token={token} />
								<View style={styles.centerContainer}>
									<View style={styles.titleContainer}>
										<TypeIcon type={type} id={id} prid={prid} />
										<Text style={[styles.title, alert && styles.alert]} ellipsizeMode='tail' numberOfLines={1}>{ name }</Text>
										{_updatedAt ? <Text style={[styles.date, alert && styles.updateAlert]} ellipsizeMode='tail' numberOfLines={1}>{ capitalize(date) }</Text> : null}
									</View>
									<View style={styles.row}>
										<LastMessage lastMessage={lastMessage} type={type} showLastMessage={showLastMessage} username={username} alert={alert} />
										<UnreadBadge unread={unread} userMentions={userMentions} type={type} />
									</View>
								</View>
							</View>
						</RectButton>
					</Animated.View>
				</Animated.View>
			</PanGestureHandler>
		);
	}
}