From 70cdd2b350bf2777ddc6ff41a1481b526bc438b5 Mon Sep 17 00:00:00 2001
From: Daniel Gasienica <daniel@signal.org>
Date: Fri, 23 Mar 2018 15:49:08 -0400
Subject: [PATCH] Add `stringToArrayBuffer` utility

This way we can avoid an extra dependency.
---
 js/modules/string_to_array_buffer.js | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 js/modules/string_to_array_buffer.js

diff --git a/js/modules/string_to_array_buffer.js b/js/modules/string_to_array_buffer.js
new file mode 100644
index 0000000000..9d147c4f8a
--- /dev/null
+++ b/js/modules/string_to_array_buffer.js
@@ -0,0 +1,11 @@
+exports.stringToArrayBuffer = (string) => {
+  if (typeof string !== 'string') {
+    throw new TypeError('`string` must be a string');
+  }
+
+  const array = new Uint8Array(string.length);
+  for (let i = 0; i < string.length; i += 1) {
+    array[i] = string.charCodeAt(i);
+  }
+  return array.buffer;
+};