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import { useEffect, useState, useCallback } from 'react'
import { useParams } from 'react-router-dom'
import dayjs from 'dayjs'
import utc from 'dayjs/plugin/utc'
dayjs.extend(utc)
import PM from './PM'
import MessageInput from './MessageInput'
import UserInfo from './UserInfo'
import { getChat, pm } from '../api'
import { useVisitor } from './VisitorContext'
import { Helmet } from 'react-helmet'
/**
*
* @typedef {object} ChatProps
* @property {EventSource} connection
*/
/**
* Chat component
* @param {ChatProps} props
*/
export default function Chat(props) {
const [visitor] = useVisitor()
const [messages, setMessages] = useState([])
const params = useParams()
let loadChat = useCallback((uname) => {
const { hash } = visitor
if (hash && uname) {
getChat(uname)
.then(response => {
setMessages(response.data)
}).catch(console.log)
}
}, [visitor])
let onMessage = useCallback((json) => {
const msg = JSON.parse(json.data)
if (msg.user.uname === params.user) {
setMessages((oldChat) => {
return [msg, ...oldChat]
})
}
}, [params.user])
let onSend = async ({ body }) => {
let result = false
let res = await pm(params.user, body).catch(console.error)
result = res.status == 200
return result
}
useEffect(() => {
if (props.connection.addEventListener) {
props.connection.addEventListener('msg', onMessage)
}
loadChat(params.user)
console.log(props.connection)
return () => {
if (props.connection.removeEventListener) {
props.connection.removeEventListener('msg', onMessage)
}
}
}, [props.connection, onMessage, loadChat, params.user])
const uname = params.user
return (
<div className="msg-cont">
<Helmet>
<title>PM: {uname}</title>
</Helmet>
<UserInfo uname={uname} />
{uname ? (
<div className="chatroom">
<ul className="Chat_messages">
{
messages.map((chat) =>
<PM key={dayjs.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>
)
}
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