Implement full auth flow in iOS

src/platform/urls.tsx

@@ -1,4 +1,5 @@
-import {isIOS, isAndroid} from './detection'
+import {Linking} from 'react-native'
+import {isIOS, isAndroid, isNative, isWeb} from './detection'
 
 export function makeAppUrl(path = '') {
   if (isIOS) {
@@ -10,3 +11,27 @@ export function makeAppUrl(path = '') {
     return `${window.location.origin}${path}`
   }
 }
+
+export function extractHashFragment(url: string): string {
+  return url.split('#')[1] || ''
+}
+
+export async function getInitialURL(): Promise<string> {
+  if (isNative) {
+    const url = await Linking.getInitialURL()
+    if (url) {
+      return url
+    }
+    return makeAppUrl()
+  } else {
+    // @ts-ignore window exists -prf
+    return window.location.toString()
+  }
+}
+
+export function clearHash() {
+  if (isWeb) {
+    // @ts-ignore window exists -prf
+    window.location.hash = ''
+  }
+}