From 7d4e89daaca6c8c57ee08c7b0c4c4fae4e1fd8c1 Mon Sep 17 00:00:00 2001
From: Matthew Chen <matthew@signal.org>
Date: Tue, 22 Jan 2019 11:32:19 -0500
Subject: [PATCH] Discard link previews if incoming message has attachments.

---
 .../src/Messages/Interactions/OWSLinkPreview.swift            | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/SignalServiceKit/src/Messages/Interactions/OWSLinkPreview.swift b/SignalServiceKit/src/Messages/Interactions/OWSLinkPreview.swift
index b72abb478..00ffb6167 100644
--- a/SignalServiceKit/src/Messages/Interactions/OWSLinkPreview.swift
+++ b/SignalServiceKit/src/Messages/Interactions/OWSLinkPreview.swift
@@ -116,6 +116,10 @@ public class OWSLinkPreview: MTLModel {
         guard let previewProto = dataMessage.preview.first else {
             throw LinkPreviewError.noPreview
         }
+        guard dataMessage.attachments.count < 1 else {
+            Logger.error("Discarding link preview; message has attachments.")
+            throw LinkPreviewError.invalidInput
+        }
         let urlString = previewProto.url
 
         guard URL(string: urlString) != nil else {