Add push notification extensions (#4005)

* add wav

* add sound to config

* add extension to `updateExtensions.sh`

* add ios source files

* add a build extension

* add a new module

* use correct type on ios

* update the build plugin

* add android handler

* create a patch for expo-notifications

* basic android implementation

* add entitlements for notifications extension

* add some generic logic for ios

* add age check logic

* add extension to app config

* remove dash

* move directory

* rename again

* update privacy manifest

* add prefs storage ios

* better types

* create interface for setting and getting prefs

* add notifications prefs for android

* add functions to module

* add types to js

* add prefs context

* add web stub

* wrap the app

* fix types

* more preferences for ios

* add a test toggle

* swap vars

* update patch

* fix patch error

* fix typo

* sigh

* sigh

* get stored prefs on launch

* anotehr type

* simplify

* about finished

* comment

* adjust plugin

* use supported file types

* update NSE

* futureproof ios

* futureproof android

* update sound file name

* handle initialization

* more cleanup

* update js types

* strict js types

* set the notification channel

* rm

* add silent channel

* add mute logic

* update patch

* podfile

* adjust channels

* fix android channel

* update readme

* oreo or higher

* nit

* don't use getValue

* nit

4 files changed, 145 insertions, 0 deletions

diff --git a/modules/expo-background-notification-handler/src/BackgroundNotificationHandlerProvider.tsx b/modules/expo-background-notification-handler/src/BackgroundNotificationHandlerProvider.tsx
new file mode 100644
index 000000000..6ecdd1d47
--- /dev/null
+++ b/modules/expo-background-notification-handler/src/BackgroundNotificationHandlerProvider.tsx
@@ -0,0 +1,70 @@
+import React from 'react'
+
+import {BackgroundNotificationHandlerPreferences} from './ExpoBackgroundNotificationHandler.types'
+import {BackgroundNotificationHandler} from './ExpoBackgroundNotificationHandlerModule'
+
+interface BackgroundNotificationPreferencesContext {
+  preferences: BackgroundNotificationHandlerPreferences
+  setPref: <Key extends keyof BackgroundNotificationHandlerPreferences>(
+    key: Key,
+    value: BackgroundNotificationHandlerPreferences[Key],
+  ) => void
+}
+
+const Context = React.createContext<BackgroundNotificationPreferencesContext>(
+  {} as BackgroundNotificationPreferencesContext,
+)
+export const useBackgroundNotificationPreferences = () =>
+  React.useContext(Context)
+
+export function BackgroundNotificationPreferencesProvider({
+  children,
+}: {
+  children: React.ReactNode
+}) {
+  const [preferences, setPreferences] =
+    React.useState<BackgroundNotificationHandlerPreferences>({
+      playSoundChat: true,
+    })
+
+  React.useEffect(() => {
+    ;(async () => {
+      const prefs = await BackgroundNotificationHandler.getAllPrefsAsync()
+      setPreferences(prefs)
+    })()
+  }, [])
+
+  const value = React.useMemo(
+    () => ({
+      preferences,
+      setPref: async <
+        Key extends keyof BackgroundNotificationHandlerPreferences,
+      >(
+        k: Key,
+        v: BackgroundNotificationHandlerPreferences[Key],
+      ) => {
+        switch (typeof v) {
+          case 'boolean': {
+            await BackgroundNotificationHandler.setBoolAsync(k, v)
+            break
+          }
+          case 'string': {
+            await BackgroundNotificationHandler.setStringAsync(k, v)
+            break
+          }
+          default: {
+            throw new Error(`Invalid type for value: ${typeof v}`)
+          }
+        }
+
+        setPreferences(prev => ({
+          ...prev,
+          [k]: v,
+        }))
+      },
+    }),
+    [preferences],
+  )
+
+  return <Context.Provider value={value}>{children}</Context.Provider>
+}
diff --git a/modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandler.types.ts b/modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandler.types.ts
new file mode 100644
index 000000000..5fbd302da
--- /dev/null
+++ b/modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandler.types.ts
@@ -0,0 +1,40 @@
+export type ExpoBackgroundNotificationHandlerModule = {
+  getAllPrefsAsync: () => Promise<BackgroundNotificationHandlerPreferences>
+  getBoolAsync: (forKey: string) => Promise<boolean>
+  getStringAsync: (forKey: string) => Promise<string>
+  getStringArrayAsync: (forKey: string) => Promise<string[]>
+  setBoolAsync: (
+    forKey: keyof BackgroundNotificationHandlerPreferences,
+    value: boolean,
+  ) => Promise<void>
+  setStringAsync: (
+    forKey: keyof BackgroundNotificationHandlerPreferences,
+    value: string,
+  ) => Promise<void>
+  setStringArrayAsync: (
+    forKey: keyof BackgroundNotificationHandlerPreferences,
+    value: string[],
+  ) => Promise<void>
+  addToStringArrayAsync: (
+    forKey: keyof BackgroundNotificationHandlerPreferences,
+    value: string,
+  ) => Promise<void>
+  removeFromStringArrayAsync: (
+    forKey: keyof BackgroundNotificationHandlerPreferences,
+    value: string,
+  ) => Promise<void>
+  addManyToStringArrayAsync: (
+    forKey: keyof BackgroundNotificationHandlerPreferences,
+    value: string[],
+  ) => Promise<void>
+  removeManyFromStringArrayAsync: (
+    forKey: keyof BackgroundNotificationHandlerPreferences,
+    value: string[],
+  ) => Promise<void>
+}
+
+// TODO there are more preferences in the native code, however they have not been added here yet.
+// Don't add them until the native logic also handles the notifications for those preference types.
+export type BackgroundNotificationHandlerPreferences = {
+  playSoundChat: boolean
+}
diff --git a/modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandlerModule.ts b/modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandlerModule.ts
new file mode 100644
index 000000000..d6517893a
--- /dev/null
+++ b/modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandlerModule.ts
@@ -0,0 +1,8 @@
+import {requireNativeModule} from 'expo-modules-core'
+
+import {ExpoBackgroundNotificationHandlerModule} from './ExpoBackgroundNotificationHandler.types'
+
+export const BackgroundNotificationHandler =
+  requireNativeModule<ExpoBackgroundNotificationHandlerModule>(
+    'ExpoBackgroundNotificationHandler',
+  )
diff --git a/modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandlerModule.web.ts b/modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandlerModule.web.ts
new file mode 100644
index 000000000..29e27fd0f
--- /dev/null
+++ b/modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandlerModule.web.ts
@@ -0,0 +1,27 @@
+import {
+  BackgroundNotificationHandlerPreferences,
+  ExpoBackgroundNotificationHandlerModule,
+} from './ExpoBackgroundNotificationHandler.types'
+
+// Stub for web
+export const BackgroundNotificationHandler = {
+  getAllPrefsAsync: async () => {
+    return {} as BackgroundNotificationHandlerPreferences
+  },
+  getBoolAsync: async (_: string) => {
+    return false
+  },
+  getStringAsync: async (_: string) => {
+    return ''
+  },
+  getStringArrayAsync: async (_: string) => {
+    return []
+  },
+  setBoolAsync: async (_: string, __: boolean) => {},
+  setStringAsync: async (_: string, __: string) => {},
+  setStringArrayAsync: async (_: string, __: string[]) => {},
+  addToStringArrayAsync: async (_: string, __: string) => {},
+  removeFromStringArrayAsync: async (_: string, __: string) => {},
+  addManyToStringArrayAsync: async (_: string, __: string[]) => {},
+  removeManyFromStringArrayAsync: async (_: string, __: string[]) => {},
+} as ExpoBackgroundNotificationHandlerModule