Rocket.Chat.ReactNative/app/views/room.js

import React from 'react';
import PropTypes from 'prop-types';
import { View, FlatList, StyleSheet } from 'react-native';
// import Markdown from 'react-native-simple-markdown';
import realm from '../lib/realm';
import RocketChat, { loadMessagesForRoom, sendMessage } from '../lib/meteor';

import Message from '../components/Message';
import MessageBox from '../components/MessageBox';
import KeyboardView from '../components/KeyboardView';

const styles = StyleSheet.create({
	container: {
		flex: 1
	},
	list: {
		flex: 1,
		transform: [{ scaleY: -1 }]
	},
	separator: {
		height: 1,
		// width: "86%",
		backgroundColor: '#CED0CE'
		// marginLeft: "14%"
	}
});

export default class RoomView extends React.Component {
	static propTypes = {
		navigation: PropTypes.object.isRequired
	}

	static navigationOptions = ({ navigation }) => ({
		title: realm.objectForPrimaryKey('subscriptions', navigation.state.params.sid).name
	});

	constructor(props) {
		super(props);
		this.rid = realm.objectForPrimaryKey('subscriptions', props.navigation.state.params.sid).rid;
		// this.rid = 'GENERAL';

		this.state = {
			dataSource: this.getMessages()
		};

		this.url = realm.objectForPrimaryKey('settings', 'Site_Url').value;
	}

	componentWillMount() {
		loadMessagesForRoom(this.rid);
		realm.addListener('change', this.updateState);
	}

	componentWillUnmount() {
		realm.removeListener('change', this.updateState);
	}

	getMessages = () => realm.objects('messages').filtered('_server.id = $0 AND rid = $1', RocketChat.currentServer, this.rid).sorted('ts', true)

	updateState = () => {
		this.setState({
			dataSource: this.getMessages()
		});
	};

	sendMessage = message => sendMessage(this.rid, message);

	renderSeparator = () => (
		<View style={styles.separator} />
	);

	renderItem = ({ item }) => (
		<Message
			id={item._id}
			item={item}
			baseUrl={this.url}
		/>
	);

	render() {
		return (
			<KeyboardView style={styles.container} keyboardVerticalOffset={64}>
				<FlatList
					ref={ref => this.listView = ref}
					style={styles.list}
					data={this.state.dataSource}
					extraData={this.state}
					renderItem={this.renderItem}
					keyExtractor={item => item._id}
					ItemSeparatorComponent={this.renderSeparator}
				/>
				<MessageBox
					onSubmit={this.sendMessage}
				/>
			</KeyboardView>
		);
	}
}