From a2fe1a8757cdb3a05aa68992139c2a8addff8f7b Mon Sep 17 00:00:00 2001
From: Richard Guan <41275416+rguan72@users.noreply.github.com>
Date: Thu, 6 Sep 2018 02:25:27 -0400
Subject: [PATCH] [Audio] Don't allow duplicate links in playlists (#2071)

* Just a test

* another test

* undoing my test

* First solution, style issue

* Works functionally, but there are is a minor style issue

* style fixed

* Revert README changes
---
 redbot/cogs/audio/audio.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/redbot/cogs/audio/audio.py b/redbot/cogs/audio/audio.py
index a36cbcb5c..7fa736367 100644
--- a/redbot/cogs/audio/audio.py
+++ b/redbot/cogs/audio/audio.py
@@ -713,6 +713,11 @@ class Audio:
                 if not to_append:
                     return
                 track_list = playlists[playlist_name]["tracks"]
+                if track_list and len(to_append) == 1 and to_append[0] in track_list:
+                    return await self._embed_msg(
+                        ctx,
+                        "{} already in {}.".format(to_append[0]["info"]["title"], playlist_name),
+                    )
                 if track_list:
                     playlists[playlist_name]["tracks"] = track_list + to_append
                 else: