Starter Packs (#4332)

Co-authored-by: Dan Abramov <dan.abramov@gmail.com>
Co-authored-by: Paul Frazee <pfrazee@gmail.com>
Co-authored-by: Eric Bailey <git@esb.lol>
Co-authored-by: Samuel Newman <mozzius@protonmail.com>

src/components/hooks/useStarterPackEntry.ts

@@ -0,0 +1,29 @@
+import React from 'react'
+
+import {httpStarterPackUriToAtUri} from 'lib/strings/starter-pack'
+import {useSetActiveStarterPack} from 'state/shell/starter-pack'
+
+export function useStarterPackEntry() {
+  const [ready, setReady] = React.useState(false)
+
+  const setActiveStarterPack = useSetActiveStarterPack()
+
+  React.useEffect(() => {
+    const href = window.location.href
+    const atUri = httpStarterPackUriToAtUri(href)
+
+    if (atUri) {
+      const url = new URL(href)
+      // Determines if an App Clip is loading this landing page
+      const isClip = url.searchParams.get('clip') === 'true'
+      setActiveStarterPack({
+        uri: atUri,
+        isClip,
+      })
+    }
+
+    setReady(true)
+  }, [setActiveStarterPack])
+
+  return ready
+}