referrers for all platforms (#4514)

modules/expo-bluesky-swiss-army/android/src/main/java/expo/modules/blueskyswissarmy/referrer/ExpoBlueskyReferrerModule.kt

@@ -1,5 +1,8 @@
 package expo.modules.blueskyswissarmy.referrer
 
+import android.content.Intent
+import android.net.Uri
+import android.os.Build
 import android.util.Log
 import com.android.installreferrer.api.InstallReferrerClient
 import com.android.installreferrer.api.InstallReferrerStateListener
@@ -8,10 +11,53 @@ import expo.modules.kotlin.modules.Module
 import expo.modules.kotlin.modules.ModuleDefinition
 
 class ExpoBlueskyReferrerModule : Module() {
+  private var intent: Intent? = null
+  private var activityReferrer: Uri? = null
+
   override fun definition() =
     ModuleDefinition {
       Name("ExpoBlueskyReferrer")
 
+      OnNewIntent {
+        intent = it
+        activityReferrer = appContext.currentActivity?.referrer
+      }
+
+      AsyncFunction("getReferrerInfoAsync") {
+        val intentReferrer =
+          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            intent?.getParcelableExtra(Intent.EXTRA_REFERRER, Uri::class.java)
+          } else {
+            intent?.getParcelableExtra(Intent.EXTRA_REFERRER)
+          }
+
+        // Some apps explicitly set a referrer, like Chrome. In these cases, we prefer this since
+        // it's the actual website that the user came from rather than the app.
+        if (intentReferrer is Uri) {
+          val res =
+            mapOf(
+              "referrer" to intentReferrer.toString(),
+              "hostname" to intentReferrer.host,
+            )
+          intent = null
+          return@AsyncFunction res
+        }
+
+        // In all other cases, we'll just record the app that sent the intent.
+        if (activityReferrer != null) {
+          // referrer could become null here. `.toString()` though can be called on null
+          val res =
+            mapOf(
+              "referrer" to activityReferrer.toString(),
+              "hostname" to (activityReferrer?.host ?: ""),
+            )
+          activityReferrer = null
+          return@AsyncFunction res
+        }
+
+        return@AsyncFunction null
+      }
+
       AsyncFunction("getGooglePlayReferrerInfoAsync") { promise: Promise ->
         val referrerClient = InstallReferrerClient.newBuilder(appContext.reactContext).build()
         referrerClient.startConnection(

modules/expo-bluesky-swiss-army/src/Referrer/index.android.ts

@@ -1,9 +1,13 @@
 import {requireNativeModule} from 'expo'
 
-import {GooglePlayReferrerInfo} from './types'
+import {GooglePlayReferrerInfo, ReferrerInfo} from './types'
 
 export const NativeModule = requireNativeModule('ExpoBlueskyReferrer')
 
-export function getGooglePlayReferrerInfoAsync(): Promise<GooglePlayReferrerInfo> {
+export function getGooglePlayReferrerInfoAsync(): Promise<GooglePlayReferrerInfo | null> {
   return NativeModule.getGooglePlayReferrerInfoAsync()
 }
+
+export function getReferrerInfoAsync(): Promise<ReferrerInfo | null> {
+  return NativeModule.getReferrerInfoAsync()
+}

modules/expo-bluesky-swiss-army/src/Referrer/index.ios.ts

@@ -0,0 +1,37 @@
+import {SharedPrefs} from '../../index'
+import {NotImplementedError} from '../NotImplemented'
+import {GooglePlayReferrerInfo, ReferrerInfo} from './types'
+
+export function getGooglePlayReferrerInfoAsync(): Promise<GooglePlayReferrerInfo> {
+  throw new NotImplementedError()
+}
+
+export function getReferrerInfoAsync(): Promise<ReferrerInfo | null> {
+  const referrer = SharedPrefs.getString('referrer')
+  if (referrer) {
+    SharedPrefs.removeValue('referrer')
+    try {
+      const url = new URL(referrer)
+      return {
+        referrer,
+        hostname: url.hostname,
+      }
+    } catch (e) {
+      return {
+        referrer,
+        hostname: undefined,
+      }
+    }
+  }
+
+  const referrerApp = SharedPrefs.getString('referrerApp')
+  if (referrerApp) {
+    SharedPrefs.removeValue('referrerApp')
+    return {
+      referrer: referrerApp,
+      hostname: referrerApp,
+    }
+  }
+
+  return null
+}

modules/expo-bluesky-swiss-army/src/Referrer/index.ts

@@ -1,7 +1,10 @@
 import {NotImplementedError} from '../NotImplemented'
-import {GooglePlayReferrerInfo} from './types'
+import {GooglePlayReferrerInfo, ReferrerInfo} from './types'
 
-// @ts-ignore throws
 export function getGooglePlayReferrerInfoAsync(): Promise<GooglePlayReferrerInfo> {
   throw new NotImplementedError()
 }
+
+export function getReferrerInfoAsync(): Promise<ReferrerInfo | null> {
+  throw new NotImplementedError()
+}

modules/expo-bluesky-swiss-army/src/Referrer/index.web.ts

@@ -0,0 +1,34 @@
+import {Platform} from 'react-native'
+
+import {NotImplementedError} from '../NotImplemented'
+import {GooglePlayReferrerInfo, ReferrerInfo} from './types'
+
+export function getGooglePlayReferrerInfoAsync(): Promise<GooglePlayReferrerInfo> {
+  throw new NotImplementedError()
+}
+
+export function getReferrerInfoAsync(): Promise<ReferrerInfo | null> {
+  if (
+    Platform.OS === 'web' &&
+    // for ssr
+    typeof document !== 'undefined' &&
+    document != null &&
+    document.referrer
+  ) {
+    try {
+      const url = new URL(document.referrer)
+      if (url.hostname !== 'bsky.app') {
+        return {
+          referrer: url.href,
+          hostname: url.hostname,
+        }
+      }
+    } catch {
+      // If something happens to the URL parsing, we don't want to actually cause any problems for the user. Just
+      // log the error so we might catch it
+      console.error('Failed to parse referrer URL')
+    }
+  }
+
+  return null
+}

modules/expo-bluesky-swiss-army/src/Referrer/types.ts

@@ -1,7 +1,10 @@
-export type GooglePlayReferrerInfo =
-  | {
-      installReferrer?: string
-      clickTimestamp?: number
-      installTimestamp?: number
-    }
-  | undefined
+export type GooglePlayReferrerInfo = {
+  installReferrer?: string
+  clickTimestamp?: number
+  installTimestamp?: number
+}
+
+export type ReferrerInfo = {
+  referrer: string
+  hostname: string
+}