referrers for all platforms (#4514)

src/lib/statsig/events.ts

@@ -25,6 +25,11 @@ export type LogEvents = {
   }
   'state:foreground:sampled': {}
   'router:navigate:sampled': {}
+  'deepLink:referrerReceived': {
+    to: string
+    referrer: string
+    hostname: string
+  }
 
   // Screen events
   'splash:signInPressed': {}

src/lib/statsig/statsig.tsx

@@ -28,8 +28,6 @@ type StatsigUser = {
     bundleDate: number
     refSrc: string
     refUrl: string
-    referrer: string
-    referrerHostname: string
     appLanguage: string
     contentLanguages: string[]
   }
@@ -37,29 +35,12 @@ type StatsigUser = {
 
 let refSrc = ''
 let refUrl = ''
-let referrer = ''
-let referrerHostname = ''
 if (isWeb && typeof window !== 'undefined') {
   const params = new URLSearchParams(window.location.search)
   refSrc = params.get('ref_src') ?? ''
   refUrl = decodeURIComponent(params.get('ref_url') ?? '')
 }
 
-if (
-  isWeb &&
-  typeof document !== 'undefined' &&
-  document != null &&
-  document.referrer
-) {
-  try {
-    const url = new URL(document.referrer)
-    if (url.hostname !== 'bsky.app') {
-      referrer = document.referrer
-      referrerHostname = url.hostname
-    }
-  } catch {}
-}
-
 export type {LogEvents}
 
 function createStatsigOptions(prefetchUsers: StatsigUser[]) {
@@ -222,8 +203,6 @@ function toStatsigUser(did: string | undefined): StatsigUser {
     custom: {
       refSrc,
       refUrl,
-      referrer,
-      referrerHostname,
       platform: Platform.OS as 'ios' | 'android' | 'web',
       bundleIdentifier: BUNDLE_IDENTIFIER,
       bundleDate: BUNDLE_DATE,