我在 Facebook Auth 流程中使用了 Promises
混合/facebook.js
const promises = {
init: () => {
return new Promise((resolve, reject) => {
if (typeof FB !== 'undefined') {
resolve();
} else {
window.fbAsyncInit = () => {
FB.init({
appId : '<app_id>',
cookie : true,
xfbml : true,
version : 'v2.5'
});
resolve();
};
(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/sdk.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
}
});
},
checkLoginState: () => {
return new Promise((resolve, reject) => {
FB.getLoginStatus((response) => {
response.status === 'connected' ? resolve(response) : reject(response);
});
});
},
login: () => {
return new Promise((resolve, reject) => {
FB.login((response) => {
response.status === 'connected' ? resolve(response) : reject(response);
});
});
},
logout: () => {
return new Promise((resolve, reject) => {
FB.logout((response) => {
response.authResponse ? resolve(response) : reject(response);
});
});
},
fetch: () => {
return new Promise((resolve, reject) => {
FB.api(
'/me',
{fields: 'first_name, last_name, gender'},
response => response.error ? reject(response) : resolve(response)
);
});
}
}
export const Facebook = {
doLogin() {
this.setState({
loading: true
}, () => {
promises.init()
.then(
promises.checkLoginState,
error => { throw error; }
)
.then(
response => { this.setState({status: response.status}); },
promises.login
)
.then(
promises.fetch,
error => { throw error; }
)
.then(
response => { this.setState({loading: false, data: response, status: 'connected'}); },
error => { throw error; }
)
.catch((error) => {
this.setState({loading: false, data: {}, status: 'unknown'});
console.warn(error);
});
});
},
doLogout() {
this.setState({
loading: true
}, () => {
promises.init()
.then(
promises.checkLoginState,
error => { throw error; }
)
.then(
promises.logout,
error => { this.setState({data: {}, status: 'unknown'}); }
)
.then(
response => { this.setState({loading: false, data: {}, status: 'unknown'}); },
error => { throw error; }
)
.catch(error => {
this.setState({loading: false, data: {}, status: 'unknown'});
console.warn(error);
});
});
},
checkStatus() {
this.setState({
loading: true
}, () => {
promises.init()
.then(
promises.checkLoginState,
error => { throw error; }
)
.then(
response => { this.setState({status: response.status}); },
error => { throw error; }
)
.then(
promises.fetchUser,
error => { throw error; }
)
.then(
response => { this.setState({loading: false, data: response, status: 'connected'}); },
error => { throw error; }
)
.catch((error) => {
this.setState({loading: false, data: {}, status: 'unknown'});
console.warn(error);
});
});
}
};
配置文件.jsx
import {Facebook} from './mixins/Facebook.js';
import {Button} from 'react-bootstrap';
const ProfileHandler = React.createClass({
mixins: [Facebook],
componentDidMount() {
this.checkStatus();
},
getInitialState() {
return {
status: 'unknown',
loading: false,
data: {}
};
},
render() {
const loading = this.state.loading ? <p>Please wait, profile is loading ...</p> : null;
const message = this.state.status === 'connected'
? (<div>
Hi {data.name}!
<Button onClick={this.doLogout}>Logout</Button>
</div>)
: (<Button onClick={this.doLogin}>Login</Button>);
return (
<div>
{message}
{loading}
</div>
);
}
});