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1. 지난 소스코드 복습하기


2. 소스코드 수정하기


▶ AppShell.js


<MenuItem onClick={this.handleDrawerToggle}>
<Link component={RouterLink} to="/">
홈 화면
</Link>
</MenuItem>
<MenuItem onClick={this.handleDrawerToggle}>
<Link component={RouterLink} to="/texts">
텍스트 관리
</Link>
</MenuItem>
<MenuItem onClick={this.handleDrawerToggle}>
<Link component={RouterLink} to="/words">
단어 관리
</Link>
</MenuItem>


▶ Words.js


import React from 'react';
import Card from '@material-ui/core/Card';
import CardContent from '@material-ui/core/CardContent';
import Typography from '@material-ui/core/Typography';
import { withStyles } from '@material-ui/core/styles';
import Grid from '@material-ui/core/Grid';
import Button from '@material-ui/core/Button';
import Fab from '@material-ui/core/Fab';
import AddIcon from '@material-ui/icons/Add';
import Dialog from '@material-ui/core/Dialog';
import DialogActions from '@material-ui/core/DialogActions';
import DialogContent from '@material-ui/core/DialogContent';
import DialogTitle from '@material-ui/core/DialogTitle';
import TextField from '@material-ui/core/TextField';

const styles = theme => ({
fab: {
position: 'fixed',
bottom: '20px',
right: '20px'
},
});

const databaseURL = "https://react-example-55161.firebaseio.com/";

class Words extends React.Component {
constructor() {
super();
this.state = {
words: {},
dialog: false,
word: '',
weight: ''
};
}

_get() {
fetch(`${databaseURL}/words.json`).then(res => {
if(res.status != 200) {
throw new Error(res.statusText);
}
return res.json();
}).then(words => this.setState({words: words}));
}

_post(word) {
return fetch(`${databaseURL}/words.json`, {
method: 'POST',
body: JSON.stringify(word)
}).then(res => {
if(res.status != 200) {
throw new Error(res.statusText);
}
return res.json();
}).then(data => {
let nextState = this.state.words;
nextState[data.name] = word;
this.setState({words: nextState});
});
}

_delete(id) {
return fetch(`${databaseURL}/words/${id}.json`, {
method: 'DELETE'
}).then(res => {
if(res.status != 200) {
throw new Error(res.statusText);
}
return res.json();
}).then(() => {
let nextState = this.state.words;
delete nextState[id];
this.setState({words: nextState});
});
}

componentDidMount() {
this._get();
}

handleDialogToggle = () => this.setState({
dialog: !this.state.dialog
})

handleValueChange = (e) => {
let nextState = {};
nextState[e.target.name] = e.target.value;
this.setState(nextState);
}

handleSubmit = () => {
const word = {
word: this.state.word,
weight: this.state.weight
}
this.handleDialogToggle();
if (!word.word && !word.weight) {
return;
}
this._post(word);
}

handleDelete = (id) => {
this._delete(id);
}

render() {
const { classes } = this.props;
return (
<div>
{Object.keys(this.state.words).map(id => {
const word = this.state.words[id];
return (
<div key={id}>
<Card>
<CardContent>
<Typography color="textSecondary" gutterBottom>
가중치: {word.weight}
</Typography>
<Grid container>
<Grid item xs={6}>
<Typography variant="h5" component="h2">
{word.word}
</Typography>
</Grid>
<Grid item xs={6}>
<Button variant="contained" color="primary" onClick={() => this.handleDelete(id)}>삭제</Button>
</Grid>
</Grid>
</CardContent>
</Card>
<br />
</div>
);
})}
<Fab color="primary" className={classes.fab} onClick={this.handleDialogToggle}>
<AddIcon />
</Fab>
<Dialog open={this.state.dialog} onClose={this.handleDialogToggle}>
<DialogTitle>단어 추가</DialogTitle>
<DialogContent>
<TextField label="단어" type="text" name="word" value={this.state.word} onChange={this.handleValueChange}/><br/>
<TextField label="가중치" type="number" name="weight" value={this.state.weight} onChange={this.handleValueChange}/><br/>
</DialogContent>
<DialogActions>
<Button variant="contained" color="primary" onClick={this.handleSubmit}>추가</Button>
<Button variant="outlined" color="primary" onClick={this.handleDialogToggle}>닫기</Button>
</DialogActions>
</Dialog>
</div>
);
}
}

export default withStyles(styles)(Words);


※ 실행 결과 ※





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