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Firebase real-time chatroom app using react class based components
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class App extends Component { | |
constructor() { | |
super(); | |
this.state = { | |
joined: false, | |
nickname: "", | |
email: "", | |
msg: "", | |
messages: {}, | |
}; | |
this.chatRoom = db.ref().child('chatrooms').child('global'); | |
this.handleNewMessages = snap => { | |
console.log(snap.val()); | |
// if not null then update state | |
if (snap.val()) this.setState({ messages: snap.val() }); | |
}; | |
} | |
componentDidMount() { | |
// subscribe | |
this.chatRoom.on('value', this.handleNewMessages); | |
} | |
componentWillUnmount() { | |
// unsubscribe | |
this.chatRoom.off('value', this.handleNewMessages); | |
} | |
handleNameChange = e => this.setState({ nickname: e.target.value }); | |
handleEmailChange = e => this.setState({ email: e.target.value }); | |
handleClick = e => { | |
// register the nickname | |
db.ref().child('nicknames').push({ | |
nickname: this.state.nickname, | |
email: this.state.email, | |
}); | |
this.setState({ joined: true }); | |
}; | |
handleMsgChange = e => this.setState({ msg: e.target.value }); | |
handleKeyDown = e => { | |
if (e.key === "Enter") { | |
// send the msg | |
this.chatRoom.push({ | |
sender: this.state.nickname, | |
msg: this.state.msg, | |
}); | |
// clear the field | |
this.setState({ msg: "" }); | |
} | |
}; | |
render() { | |
return ( | |
<div className="App"> | |
{!this.state.joined ? ( | |
<div className="joinForm"> | |
<input placeholder="Nickname" value={this.state.nickname} onChange={this.handleNameChange} /><br /> | |
<input placeholder="Email" value={this.state.email} onChange={this.handleEmailChange} /><br /> | |
<button onClick={this.handleClick}>Join</button> | |
</div> | |
) : ( | |
<div className="chat"> | |
<div className="messages"> | |
{Object.keys(this.state.messages).map(message => { | |
// Check if the msg is from the user | |
if (this.state.messages[message]["sender"] === this.state.nickname) | |
return ( | |
<div className="message"> | |
<span id="me">{this.state.messages[message]["sender"]} :</span><br /> | |
{this.state.messages[message]["msg"]} | |
</div> | |
); | |
else | |
return ( | |
<div className="message"> | |
<span id="sender">{this.state.messages[message]["sender"]} :</span><br /> | |
{this.state.messages[message]["msg"]} | |
</div> | |
); | |
})} | |
</div> | |
<input placeholder="msg" onChange={this.handleMsgChange} onKeyDown={this.handleKeyDown} value={this.state.msg} /><br /> | |
</div> | |
)} | |
</div> | |
); | |
} | |
} |
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