From b692fcec733646128b713e0b3a38f9e2561fb341 Mon Sep 17 00:00:00 2001
From: Adam K <adam@kahtava.com>
Date: Mon, 27 Mar 2023 11:21:37 -0400
Subject: [PATCH] Resolve linkify error (#454)

---
 src/store/messages/saga.test.ts | 9 +++++++++
 src/store/messages/saga.ts      | 4 +++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/store/messages/saga.test.ts b/src/store/messages/saga.test.ts
index f8d20bccb..364d1babc 100644
--- a/src/store/messages/saga.test.ts
+++ b/src/store/messages/saga.test.ts
@@ -19,6 +19,7 @@ import {
   editMessage,
   uploadFileMessage,
   receiveNewMessage,
+  getPreview,
 } from './saga';
 
 import { rootReducer } from '..';
@@ -793,4 +794,12 @@ describe('messages saga', () => {
       'the-third-message-id': { id: 'the-third-message-id', message: 'the third message' },
     });
   });
+
+  describe('getPreview', () => {
+    it('guards from empty messages (like when you upload a file)', () => {
+      const generator = getPreview(null);
+
+      expect(generator.next().value).toEqual(undefined);
+    });
+  });
 });
diff --git a/src/store/messages/saga.ts b/src/store/messages/saga.ts
index 6dded54f9..3019df84d 100644
--- a/src/store/messages/saga.ts
+++ b/src/store/messages/saga.ts
@@ -339,7 +339,9 @@ export function* receiveNewMessage(action) {
   );
 }
 
-function* getPreview(message) {
+export function* getPreview(message) {
+  if (!message) return;
+
   const link: linkifyType[] = extractLink(message);
   if (!link.length) return;