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path: root/vnext/src/components/Chat.js
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import React, { useEffect, useState } from 'react';
import PropTypes from 'prop-types';
import ReactRouterPropTypes from 'react-router-prop-types';
import { UserType } from './Types';
import moment from 'moment';

import PM from './PM';
import MessageInput from './MessageInput';
import UserInfo from './UserInfo';

import { getChat, pm } from '../api';

import './Chat.css';

export default function Chat(props) {
    const [chats, setChats] = useState([]);
    useEffect(() => {        
        if (props.connection.addEventListener) {
            props.connection.addEventListener('msg', onMessage);
        }
        loadChat(props.match.params.user);
        console.log(props.connection);
        return () => {
            if (props.connection.removeEventListener) {
                props.connection.removeEventListener('msg', onMessage);
            }
        };
    }, [props.connection.readyState]);

    let loadChat = (uname) => {
        const { hash } = props.visitor;
        setChats([]);
        if (hash && uname) {
            getChat(uname)
                .then(response => {
                    setChats(response.data);
                });
        }
    };

    let onMessage = (json) => {
        const msg = JSON.parse(json.data);
        if (msg.user.uname === props.match.params.user) {
            setChats((oldChat) => {
                return [msg, ...oldChat];
            });
        }
    };

    let onSend = (template) => {
        pm(template.to.uname, template.body)
            .then(res => {
                loadChat(props.match.params.user);
            }).catch(console.log);
    };
    const uname = props.match.params.user;
    return (
        <div className="msg-cont">
            <UserInfo user={uname} />
            {uname ? (
                <div className="chatroom">
                    <ul className="Chat_messages">
                        {
                            chats.map((chat) =>
                                <PM key={moment.utc(chat.timestamp).valueOf()} chat={chat} {...props} />
                            )
                        }
                    </ul>
                    <MessageInput data={{ mid: 0, timestamp: '0', to: { uname: uname } }} onSend={onSend}>
                        Reply...
                            </MessageInput>
                </div>
            ) : (
                    <div className="chatroom no-selection"><p>No chat selected</p></div>
                )
            }
        </div>
    );
}

Chat.propTypes = {
    visitor: UserType.isRequired,
    match: ReactRouterPropTypes.match.isRequired,
    connection: PropTypes.object.isRequired
};