[APP-1787] Some analytics cleanup (#9736)

* Clean up flags

* Move getMetadataForLogger

* Nail down attributers

* Polyfill features cache

src/analytics/features/index.ts

@@ -1,10 +1,26 @@
+import {MMKV} from '@bsky.app/react-native-mmkv'
+import {setPolyfills} from '@growthbook/growthbook'
 import {GrowthBook} from '@growthbook/growthbook-react'
 
-import {type Metadata} from '#/analytics/metadata'
+import {getNavigationMetadata, type Metadata} from '#/analytics/metadata'
 import * as env from '#/env'
 
 export {Features} from '#/analytics/features/types'
 
+const CACHE = new MMKV({id: 'bsky_features_cache'})
+
+setPolyfills({
+  localStorage: {
+    getItem: key => {
+      const value = CACHE.getString(key)
+      return value != null ? JSON.parse(value) : null
+    },
+    setItem: async (key, value) => {
+      CACHE.set(key, JSON.stringify(value))
+    },
+  },
+})
+
 /**
  * We vary the amount of time we wait for GrowthBook to fetch feature
  * gates based on the strategy specified.
@@ -46,17 +62,28 @@ export async function refresh({strategy}: {strategy: FeatureFetchStrategy}) {
 }
 
 /**
- * Converts our metadata into GrowthBook attributes and sets them.
+ * Converts our metadata into GrowthBook attributes and sets them. GrowthBook
+ * attributes are manually configured in the GrowthBook dashboard. So these
+ * values need to match exactly. Therefore, let's add them here manually to and
+ * not spread them to avoid mistakes.
  */
-export function setAttributes({base, session, preferences}: Metadata) {
-  const {deviceId, sessionId, ...br} = base
+export function setAttributes({
+  base,
+  geolocation,
+  session,
+  preferences,
+}: Metadata) {
   features.setAttributes({
-    device_id: deviceId, // GrowthBook special field
-    session_id: sessionId, // GrowthBook special field
-    user_id: session?.did, // GrowthBook special field
-    id: session?.did, // GrowthBook special field
-    ...br,
-    ...(session || {}),
-    ...(preferences || {}),
+    deviceId: base.deviceId,
+    sessionId: base.sessionId,
+    platform: base.platform,
+    appVersion: base.appVersion,
+    countryCode: geolocation.countryCode,
+    regionCode: geolocation.regionCode,
+    did: session?.did,
+    isBskyPds: session?.isBskyPds,
+    appLanguage: preferences?.appLanguage,
+    contentLanguages: preferences?.contentLanguages,
+    currentScreen: getNavigationMetadata()?.currentScreen,
   })
 }

src/analytics/features/types.ts

@@ -1,7 +1,12 @@
 export enum Features {
-  DebugFeedContext = 'debug_show_feedcontext',
-  IsBskyTeam = 'is_bsky_team_member',
-  DisableOnboardingFindContacts = 'disable_onboarding_find_contacts',
-  DisableSettingsFindContacts = 'disable_settings_find_contacts',
-  DisableLiveNowBeta = 'disable_live_now_beta',
+  // core flags
+  IsBskyTeam = 'is_bsky_team',
+
+  // debug flags
+  DebugFeedContext = 'debug_feed_context',
+
+  // feature flags
+  ImportContactsOnboardingDisable = 'import_contacts:onboarding:disable',
+  ImportContactsSettingsDisable = 'import_contacts:settings:disable',
+  LiveNowBetaDisable = 'live_now_beta:disable',
 }