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function App() { | |
const [nickname, setNickname] = useState(""); | |
const [email, setEmail] = useState(""); | |
const [joined, setJoined] = useState(false); | |
const [msg, setMsg] = useState(""); | |
const [messages, setMessages] = useState({}); | |
const chatRoom = db.ref().child('chatrooms').child('global'); | |
useEffect(() => { | |
const handleNewMessages = snap => { | |
if (snap.val()) setMessages(snap.val()); | |
} | |
chatRoom.on('value', handleNewMessages); | |
return () => { | |
chatRoom.off('value', handleNewMessages); | |
}; | |
}); | |
const handleNameChange = e => setNickname(e.target.value); | |
const handleEmailChange = e => setEmail(e.target.value); | |
const handleClick = e => { | |
db.ref().child('nicknames').push({ | |
nickname, | |
email, | |
}); | |
setJoined(true); | |
}; | |
const handleMsgChange = e => setMsg(e.target.value); | |
const handleKeyDown = e => { | |
if (e.key === "Enter") { | |
chatRoom.push({ | |
sender: nickname, | |
msg, | |
}); | |
setMsg(""); | |
} | |
}; | |
return ( | |
<div className="App"> | |
{!joined ? ( | |
<div className="joinForm"> | |
<input placeholder="Nickname" value={nickname} onChange={handleNameChange} /><br /> | |
<input placeholder="Email" value={email} onChange={handleEmailChange} /><br /> | |
<button onClick={handleClick}>Join</button> | |
</div> | |
) : ( | |
<div className="chat"> | |
<div className="messages"> | |
{Object.keys(messages).map(message => { | |
if (messages[message]["sender"] === nickname) | |
return ( | |
<div className="message"> | |
<span id="me">{messages[message]["sender"]} :</span><br /> | |
{messages[message]["msg"]} | |
</div> | |
); | |
else | |
return ( | |
<div className="message"> | |
<span id="sender">{messages[message]["sender"]} :</span><br /> | |
{messages[message]["msg"]} | |
</div> | |
); | |
})} | |
</div> | |
<input placeholder="msg" onChange={handleMsgChange} onKeyDown={handleKeyDown} value={msg} /><br /> | |
</div> | |
)} | |
</div> | |
); | |
} |
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