From 8e25a1a880a37d276d72b43dff50d0e1925c67e3 Mon Sep 17 00:00:00 2001
From: Brent Vatne <brentvatne@gmail.com>
Date: Wed, 19 Aug 2020 12:29:13 -0700
Subject: [PATCH] =?UTF-8?q?=F0=9F=8C=8A=20Add=20Expo=20managed=20workflow?=
 =?UTF-8?q?=20support=20for=20SDK=2039+?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This is done by using the ExpoRandom native module if it exists.
---
 getRandomBase64.expo.js |  8 ++++++++
 getRandomBase64.js      |  3 +++
 index.js                |  8 ++++----
 readme.md               | 15 ++++++++++++---
 4 files changed, 27 insertions(+), 7 deletions(-)
 create mode 100644 getRandomBase64.expo.js
 create mode 100644 getRandomBase64.js

diff --git a/getRandomBase64.expo.js b/getRandomBase64.expo.js
new file mode 100644
index 0000000..d18bacc
--- /dev/null
+++ b/getRandomBase64.expo.js
@@ -0,0 +1,8 @@
+import { NativeModules } from 'react-native';
+
+// In the Expo managed workflow the getRandomBase64 method is provided by ExpoRandom.getRandomBase64String
+if (!NativeModules.ExpoRandom) {
+  throw new Error('Expo managed workflow support for react-native-get-random-values is only available in SDK 39 and higher.');
+}
+
+export default NativeModules.ExpoRandom.getRandomBase64String;
\ No newline at end of file
diff --git a/getRandomBase64.js b/getRandomBase64.js
new file mode 100644
index 0000000..f6db264
--- /dev/null
+++ b/getRandomBase64.js
@@ -0,0 +1,3 @@
+import { NativeModules } from 'react-native';
+
+export default NativeModules.RNGetRandomValues.getRandomBase64;
\ No newline at end of file
diff --git a/index.js b/index.js
index 4f9ded5..57f034a 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,5 @@
-const RNGetRandomValues = require('react-native').NativeModules.RNGetRandomValues
-const base64Decode = require('fast-base64-decode')
+import getRandomBase64 from './getRandomBase64'
+import base64Decode from 'fast-base64-decode'
 
 class TypeMismatchError extends Error {}
 class QuotaExceededError extends Error {}
@@ -31,7 +31,7 @@ function getRandomValues (array) {
     throw new QuotaExceededError('Can only request a maximum of 65536 bytes')
   }
 
-  // Calling RNGetRandomValues.getRandomBase64 in debug mode leads to the error
+  // Calling getRandomBase64 in debug mode leads to the error
   // "Calling synchronous methods on native modules is not supported in Chrome".
   // So in that specific case we fall back to just using Math.random.
   if (__DEV__) {
@@ -40,7 +40,7 @@ function getRandomValues (array) {
     }
   }
 
-  base64Decode(RNGetRandomValues.getRandomBase64(array.byteLength), new Uint8Array(array.buffer, array.byteOffset, array.byteLength))
+  base64Decode(getRandomBase64(array.byteLength), new Uint8Array(array.buffer, array.byteOffset, array.byteLength))
 
   return array
 }
diff --git a/readme.md b/readme.md
index c924669..92b2255 100644
--- a/readme.md
+++ b/readme.md
@@ -1,14 +1,16 @@
-# `getRandomValues` for React Native
+# `crypo.getRandomValues` for React Native
 
-A small implementation of `getRandomValues` for React Native.
+A small implementation of `crypto.getRandomValues` for React Native. This is useful to polyfill for libraries like [uuid](https://www.npmjs.com/package/uuid) that depend on it.
 
 ## Installation
 
 ```sh
 npm install --save react-native-get-random-values
-cd ios && pod install && cd ..
+npx pod-install
 ```
 
+> 💡 If you use the Expo managed workflow you will see "CocoaPods is not supported in this project" - this is fine, it's not necessary.
+
 ## Usage
 
 This library works as a polyfill for the global `crypto.getRandomValues`.
@@ -18,6 +20,13 @@ This library works as a polyfill for the global `crypto.getRandomValues`.
 import 'react-native-get-random-values'
 ```
 
+Now you can use `uuid` or other libraries that assume `crypto.getRandomValues` is available.
+
+```javascript
+import { v4 as uuid } from 'uuid';
+console.log(uuid());
+```
+
 ## API
 
 ### `crypto.getRandomValues(typedArray)`