Add Universal Links routing sample

universalLinksRouter.js

@@ -0,0 +1,69 @@
+import {useEffect} from 'react';
+import {Linking} from 'react-native';
+import {useShopifyCheckoutSheet} from '@shopify/checkout-sheet-kit';
+
+// [START universal-links.route-url]
+class StorefrontURL {
+  constructor(url) {
+    this.url = url;
+    this.parsedUrl = new URL(url);
+  }
+
+  isCheckout() {
+    return this.parsedUrl.pathname.includes('/checkouts/');
+  }
+
+  isCart() {
+    return (
+      this.parsedUrl.pathname === '/cart' ||
+      this.parsedUrl.pathname.startsWith('/cart/')
+    );
+  }
+
+  isThankYouPage() {
+    return /\/thank[-_]you/i.test(this.parsedUrl.pathname);
+  }
+}
+
+export function useUniversalLinksRouter({navigation}) {
+  const shopifyCheckout = useShopifyCheckoutSheet();
+
+  useEffect(() => {
+    async function routeUrl(url) {
+      const storefrontUrl = new StorefrontURL(url);
+
+      if (storefrontUrl.isCheckout() && !storefrontUrl.isThankYouPage()) {
+        shopifyCheckout.present(url);
+        return;
+      }
+
+      if (storefrontUrl.isCart()) {
+        navigation.navigate('Cart');
+        return;
+      }
+
+      if (await Linking.canOpenURL(url)) {
+        await Linking.openURL(url);
+      }
+    }
+
+    Linking.getInitialURL().then((url) => {
+      if (url) routeUrl(url);
+    });
+
+    const subscription = Linking.addEventListener('url', ({url}) => {
+      routeUrl(url);
+    });
+
+    return () => subscription.remove();
+  }, [navigation, shopifyCheckout]);
+}
+// [END universal-links.route-url]
+
+// [START universal-links.use-router]
+function Routes({navigation}) {
+  useUniversalLinksRouter({navigation});
+
+  return null;
+}
+// [END universal-links.use-router]