Move the LiveStreamError to the exceptions module

cogs/music.py

@@ -245,6 +245,8 @@ class Music:
                 return None
             entry, _ = await state.songs.add_entry(song, requester)
 
+        if entry.get('is_live', False):
+            raise LiveStreamError("I cannot download a live stream!!")
         return entry
 
     @commands.command(pass_context=True)
@@ -355,7 +357,7 @@ class Music:
             entry = await self.add_entry(song, ctx)
         except asyncio.TimeoutError:
             await ctx.send("You took too long!")
-        except ExtractionError as e:
+        except LiveStreamError as e:
             await ctx.send(str(e))
         else:
             if entry is None:

cogs/voice_utilities/downloader.py

@@ -5,12 +5,9 @@ import youtube_dl
 
 from concurrent.futures import ThreadPoolExecutor
 
-class LiveStreamError(Exception):
-    pass
-
 def match_filter(info_dict):
     if 'is_live' in info_dict and info_dict['is_live'] == True:
-        raise LiveStreamError("Cannot download livestreams!")
+        return "Cannot download live streams!"
     return None
 
 

cogs/voice_utilities/exceptions.py

@@ -26,6 +26,10 @@ class CommandError(MusicbotException):
 class ExtractionError(MusicbotException):
     pass
 
+# Live stream's cannot be downloaded
+class LiveStreamError(MusicbotException):
+    pass
+
 
 # The no processing entry type failed and an entry was a playlist/vice versa
 class WrongEntryTypeError(ExtractionError):