@flexpa/link-react-native
Version:
React Native SDK for integrating FlexpaLink into mobile applications
130 lines (129 loc) • 5 kB
JavaScript
import { useURL } from 'expo-linking';
import * as WebBrowser from 'expo-web-browser';
import qs from 'query-string';
import { useCallback, useEffect, useRef, useState } from 'react';
import { View, StyleSheet, Platform } from 'react-native';
import { WebView } from 'react-native-webview';
const styles = StyleSheet.create({ container: { flex: 1 } });
const escapeJs = (str) => str.replace(/'/g, "\\'").replace(/\n/g, '\\n').replace(/\r/g, '\\r');
/**
* FlexpaLink React Native component for OAuth flows
*/
export default function FlexpaLink({ publishableKey, userExternalId, redirectUri, onSuccess, onExit, containerStyle, webViewStyle, webViewProps = {}, }) {
const [resumeContext, setResumeContext] = useState();
const [key, setKey] = useState(0); // forces reload
const [interceptedUrl, setInterceptedUrl] = useState();
const [webViewSource, setWebViewSource] = useState(null);
const webRef = useRef(null);
const url = useURL();
const generateFlexpaLinkHtml = (resumeContextParam) => `
<!doctype html>
<html>
<head>
<meta name="viewport" content="width=device-width,initial-scale=1">
<style>html,body{margin:0;height:100%}</style>
</head>
<body>
<script src="https://js.flexpa.com/v1/"></script>
<script>
FlexpaLink.create({
publishableKey: '${escapeJs(publishableKey)}',
user: {
externalId: '${escapeJs(userExternalId)}'
},
redirectUrl: '${escapeJs(redirectUri)}',
onSuccess: (publicToken) => {
window.ReactNativeWebView.postMessage(JSON.stringify({
action: 'success',
data: { publicToken }
}));
},
onExit: (error) => {
window.ReactNativeWebView.postMessage(JSON.stringify({
action: 'exit',
data: { error }
}));
},
usage: 'MULTIPLE',
${resumeContextParam ? `_experimentalResumeContext: ${JSON.stringify(resumeContextParam)}` : ''}
});
${!resumeContextParam
? `
setTimeout(() => {
FlexpaLink.open();
}, 100);`
: ''}
</script>
</body>
</html>
`;
/* ---- Set initial webViewSource and update on resumeContext change ---- */
useEffect(() => {
const html = generateFlexpaLinkHtml(resumeContext);
setWebViewSource({ html });
setKey((k) => k + 1); // reload WebView
}, [resumeContext]);
/* ---- Deep-link handler using useURL hook ---- */
useEffect(() => {
if (url) {
if (Platform.OS === 'ios') {
WebBrowser.dismissAuthSession();
}
else {
WebBrowser.dismissBrowser();
}
const query = qs.parseUrl(url).query;
const resumeContext = query.resume_context;
if (typeof resumeContext === 'string') {
setResumeContext(resumeContext);
}
}
}, [url]);
/* ---- Handle intercepted URLs asynchronously ---- */
useEffect(() => {
if (interceptedUrl) {
const handleAuth = async () => {
try {
await WebBrowser.openAuthSessionAsync(interceptedUrl, redirectUri);
}
catch (error) {
if (onExit)
onExit(error);
}
};
void handleAuth();
setInterceptedUrl(undefined);
}
}, [interceptedUrl, redirectUri, onExit]);
/* ---- intercept payer auth nav ---- */
const intercept = useCallback((req) => {
// Allow navigation within Flexpa domains, intercept everything else
if (!req.url.startsWith('https://link.flexpa.com') &&
!req.url.startsWith('about:') &&
!req.url.startsWith('data:')) {
setInterceptedUrl(req.url);
return false;
}
return true;
}, []);
/* ---- msg from Flexpa JS ---- */
const handleMsg = ({ nativeEvent }) => {
try {
const m = JSON.parse(nativeEvent.data);
if (m.action === 'success')
onSuccess(m.data.publicToken);
if (m.action === 'exit' && onExit)
onExit(m.data.error);
}
catch (error) {
// eslint-disable-next-line no-console
console.warn('Failed to parse WebView message:', error);
if (onExit)
onExit(error);
}
};
return (<View style={[styles.container, containerStyle]}>
{webViewSource && (<WebView key={key} ref={webRef} originWhitelist={['*']} source={webViewSource} onShouldStartLoadWithRequest={intercept} onMessage={handleMsg} setSupportMultipleWindows={false} sharedCookiesEnabled style={webViewStyle} {...webViewProps}/>)}
</View>);
}
//# sourceMappingURL=FlexpaLink.js.map