1 files changed, 44 insertions, 0 deletions
diff --git a/comm/chat/protocols/matrix/lib/matrix-sdk/randomstring.js b/comm/chat/protocols/matrix/lib/matrix-sdk/randomstring.js
new file mode 100644
index 0000000000..2e2032a10a
--- /dev/null
+++ b/comm/chat/protocols/matrix/lib/matrix-sdk/randomstring.js
@@ -0,0 +1,44 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.randomLowercaseString = randomLowercaseString;
+exports.randomString = randomString;
+exports.randomUppercaseString = randomUppercaseString;
+/*
+Copyright 2018 New Vector Ltd
+Copyright 2019 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const LOWERCASE = "abcdefghijklmnopqrstuvwxyz";
+const UPPERCASE = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+const DIGITS = "0123456789";
+function randomString(len) {
+  return randomStringFrom(len, UPPERCASE + LOWERCASE + DIGITS);
+}
+function randomLowercaseString(len) {
+  return randomStringFrom(len, LOWERCASE);
+}
+function randomUppercaseString(len) {
+  return randomStringFrom(len, UPPERCASE);
+}
+function randomStringFrom(len, chars) {
+  let ret = "";
+  for (let i = 0; i < len; ++i) {
+    ret += chars.charAt(Math.floor(Math.random() * chars.length));
+  }
+  return ret;
+}
+\ No newline at end of file