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@kongpingfan
Created February 14, 2021 08:28
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import React from 'react';
import './App.css';
import PropTypes from 'prop-types';
import { BrowserRouter as Router, Route, NavLink, Link } from 'react-router-dom';
import { Divider, Form, Icon, Input, Modal, Button, Card, Menu, Dropdown,
Container, Header, Segment, Placeholder } from 'semantic-ui-react';
import Amplify, { Auth } from 'aws-amplify';
import API, { graphqlOperation } from '@aws-amplify/api';
import { AuthState, onAuthUIStateChange } from '@aws-amplify/ui-components';
import { AmplifyAuthenticator, AmplifySignUp } from '@aws-amplify/ui-react';
import * as queries from './graphql/queries';
import * as mutations from './graphql/mutations';
import * as subscriptions from './graphql/subscriptions';
import faker from 'faker';
import awsconfig from './aws-exports';
Amplify.configure(awsconfig);
const CATEGORIES = ['Outdoors', 'Cities'];
const COLORS = ['orange', 'yellow', 'green', 'blue', 'violet', 'purple', 'pink'];
function DealCardImage({dealName, minHeight, fontSize}) {
function dealColor(name) {
if (!name) name = '';
return COLORS[Math.floor(name.length % COLORS.length)];
}
return (
<Segment style={{minHeight, display: 'flex'}} inverted color={dealColor(dealName)} vertical>
<Header style={{margin: 'auto auto', fontSize}}>{dealName}</Header>
</Segment>
);
}
DealCardImage.propTypes = {
dealName: PropTypes.string,
minHeight: PropTypes.number,
fontSize: PropTypes.number
};
function DealCreation() {
const [modalOpen, setModalOpen] = React.useState(false);
const [name, setName] = React.useState();
const [category, setCategory] = React.useState();
function handleOpen() {
handleReset();
setModalOpen(true);
};
function handleReset() {
setName(faker.address.city())
setCategory(CATEGORIES[Math.floor(Math.random() * CATEGORIES.length)]);
}
function handleClose() {
setModalOpen(false);
};
async function handleSave(event) {
event.preventDefault();
await API.graphql(graphqlOperation(mutations.createDeal, { input: { name, category }}));
handleClose();
};
const options = CATEGORIES.map(c => ({ key: c, value: c, text: c}));
return (
<Modal
closeIcon
size='small'
open={modalOpen}
onOpen={handleOpen}
onClose={handleClose}
trigger={<p><Icon name='plus'/>Create new Deal</p>}>
<Modal.Header>Create new Deal</Modal.Header>
<Modal.Content>
<Form>
<Form.Field>
<label>Deal Name</label>
<Input fluid type='text' placeholder='Set Name' name='name' value={name || ''}
onChange={(e) => { setName(e.target.value); } }/>
</Form.Field>
<Form.Field>
<label>Category</label>
<Dropdown fluid placeholder='Select Category' selection options={options} value={category}
onChange={(e, data) => { setCategory(data.value); } }/>
</Form.Field>
{name ? (
<DealCardImage dealName={name} minHeight={320} fontSize={48}/>
) : (
<Segment style={{minHeight: 320}} secondary/>
)}
</Form>
</Modal.Content>
<Modal.Actions>
<Button content='Cancel' onClick={handleClose}/>
<Button primary labelPosition='right' content='Reset' icon='refresh' onClick={handleReset}/>
<Button positive labelPosition='right' icon='checkmark' content='Save' href='/'
disabled = {!(name && category)}
onClick={handleSave}/>
</Modal.Actions>
</Modal>
);
};
function DealsListCardGroup({ items, pageViewOrigin, cardStyle }) {
function dealCards() {
return items
.map(deal =>
<Card
key={deal.id}
as={Link} to={{ pathname: `/deals/${deal.id}`, state: { pageViewOrigin } }}
style={cardStyle}>
<DealCardImage dealName={deal.name} minHeight={140} fontSize={24}/>
<Card.Content>
<Card.Header>{deal.name}</Card.Header>
<Card.Meta><Icon name='tag'/> {deal.category}</Card.Meta>
</Card.Content>
</Card>
);
};
return (
<Card.Group centered>
{dealCards()}
</Card.Group>
);
};
DealsListCardGroup.propTypes = {
items: PropTypes.array,
pageViewOrigin: PropTypes.string,
cardStyle: PropTypes.object
};
function DealsList() {
const [deals, setDeals] = React.useState([]);
React.useEffect(() => {
async function fetchData () {
const result = await API.graphql(graphqlOperation(queries.listDeals, { limit: 1000 }));
const deals = result.data.listDeals.items;
setDeals(deals);
}
fetchData();
}, []);
React.useEffect(() => {
let dealSubscription;
async function fetchData() {
dealSubscription = await API.graphql(graphqlOperation(subscriptions.onCreateDeal)).subscribe({
next: (dealData) => {
const newDeal = dealData.value.data.onCreateDeal;
setDeals([...deals, newDeal]);
}
});
}
fetchData();
return () => {
if (dealSubscription) {
dealSubscription.unsubscribe();
}
};
});
document.title = 'Travel Deals';
return (
<Container style={{ marginTop: 70 }}>
<DealsListCardGroup items={deals} pageViewOrigin='Browse'/>
</Container>
);
};
function DealDetails({ id, locationState }) {
const [deal, setDeal] = React.useState({});
const [loading, setLoading] = React.useState(true);
React.useEffect(() => {
async function loadDealInfo() {
const dealResult = await API.graphql(graphqlOperation(queries.getDeal, { id }));
const deal = dealResult.data.getDeal;
setDeal(deal);
setLoading(false);
document.title = `${deal.name} - Travel Deals`;
};
loadDealInfo();
return () => {
setDeal({});
setLoading(true);
};
}, [id, locationState]);
return (
<Container>
<NavLink to='/'><Icon name='arrow left'/>Back to Deals list</NavLink>
<Divider hidden/>
<Card key={deal.id} style={{ width: '100%', maxWidth: 720, margin: 'auto' }}>
{loading ? (
<Placeholder fluid style={{minHeight: 320}}>
<Placeholder.Image/>
</Placeholder>
) : (
<DealCardImage dealName={deal.name} minHeight={320} fontSize={48}/>
)}
{loading ? (
<Placeholder>
<Placeholder.Line/>
<Placeholder.Line/>
</Placeholder>
) : (
<Card.Content>
<Card.Header>{deal.name}</Card.Header>
<Card.Meta><Icon name='tag'/> {deal.category}</Card.Meta>
</Card.Content>
)}
</Card>
<Divider hidden/>
</Container>
);
};
DealDetails.propTypes = {
id: PropTypes.string,
locationState: PropTypes.object
};
function AuthStateApp() {
const [authState, setAuthState] = React.useState();
const [user, setUser] = React.useState();
React.useEffect(() => {
onAuthUIStateChange((nextAuthState, authData) => {
setAuthState(nextAuthState);
setUser(authData);
});
}, []);
document.title = 'Travel Deals';
return authState === AuthState.SignedIn && user ? (
<div className='App'>
<Router>
<Menu fixed='top' color='teal' inverted>
<Menu.Menu>
<Menu.Item header href='/'><Icon name='globe'/>Travel Deals</Menu.Item>
</Menu.Menu>
<Menu.Menu position='right'>
<Menu.Item link><DealCreation/></Menu.Item>
<Dropdown item simple text={user.username}>
<Dropdown.Menu>
<Dropdown.Item onClick={() => Auth.signOut()}><Icon name='power off'/>Log Out</Dropdown.Item>
</Dropdown.Menu>
</Dropdown>
</Menu.Menu>
</Menu>
<Container style={{ marginTop: 70 }}>
<Route path='/' exact component={() =>
<DealsList/>
}/>
<Route path='/deals/:dealId' render={props =>
<DealDetails id={props.match.params.dealId} locationState={props.location.state}/>
}/>
</Container>
</Router>
</div>
) : (
<AmplifyAuthenticator>
<AmplifySignUp slot='sign-up' formFields={[
{ type: 'username' },
{ type: 'password' },
{ type: 'email' }
]}/>
</AmplifyAuthenticator>
);
};
export default AuthStateApp;
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