Lots of small changes to improve speed and make sure commands are explicit in being guild only

roxbot/cogs/admin.py

 			;slowmode [time/"off"]
 			seconds =  number of seconds for the cooldown between messages a user has.
 			off = turns off slowmode for this channel"""
+		# TODO: Edit this when api is avalible for discord's new slowmode feature.
 		if seconds == "off" and self.slow_mode:  # Turn Slow Mode off
 			self.slow_mode = False
 			self.slow_mode_channels.pop(ctx.channel.id)
 		else:
 			pass
 
+	@commands.guild_only()
 	@commands.has_permissions(manage_messages=True)
 	@commands.bot_has_permissions(manage_messages=True, read_message_history=True)
 	@commands.cooldown(1, 5)

roxbot/cogs/joinleave.py

 			colour=roxbot.EmbedColours.pink)
 		em.set_thumbnail(url=member.avatar_url)
 
-		channel = self.bot.get_channel(settings["greets"]["welcome-channel"])
+		channel = member.guild.get_channel(settings["greets"]["welcome-channel"])
 		return await channel.send(embed=em)
 
 	async def on_member_remove(self, member):
 		if not settings["goodbyes"]["enabled"]:
 			return
 		else:
-			channel = self.bot.get_channel(channel)
+			channel = member.guild.get_channel(channel)
 			return await channel.send(embed=discord.Embed(
 				description="{}#{} has left or been beaned.".format(member.name, member.discriminator), colour=roxbot.EmbedColours.pink))
 
+	@commands.guild_only()
 	@commands.has_permissions(manage_messages=True)
 	@commands.command()
 	async def greets(self, ctx, setting, channel: typing.Optional[discord.TextChannel] = None, *, text: str):
 			return await ctx.send("No valid option given.")
 		return settings.update(greets, "greets")
 
-
+	@commands.guild_only()
 	@commands.has_permissions(manage_messages=True)
 	@commands.command()
 	async def goodbyes(self, ctx, setting, *, channel: typing.Optional[discord.TextChannel] = None):

roxbot/cogs/nsfw.py

 		post_url = "https://simg3.gelbooru.com/images/"
 		return await ctx.invoke(self.gelbooru_clone, base_url=base_url, post_url=post_url, tags=tags)
 
+	@commands.guild_only()
 	@commands.has_permissions(manage_channels=True)
 	@commands.command()
 	async def nsfw(self, ctx, setting, *, changes=None):

roxbot/cogs/reddit.py

 		if ctx.invoked_with == "subreddit" and isinstance(ctx.channel, discord.TextChannel):
 			# Only log the command when it is this command being used. Not the inbuilt commands.
 			logging = guild_settings.get(ctx.guild)["logging"]
-			log_channel = self.bot.get_channel(logging["channel"])
+			log_channel = ctx.guild.get_channel(logging["channel"])
 			await roxbot.log(
 				ctx.guild,
 				log_channel,

roxbot/cogs/selfassign.py

 				sa["roles"].remove(role.id)
 				return settings.update(sa, "self_assign")
 
-	@commands.has_permissions(manage_roles=True)
 	@commands.guild_only()
+	@commands.has_permissions(manage_roles=True)
 	@commands.command(aliases=["sa"])
 	async def selfassign(self, ctx, setting, *, role: discord.Role):
 		"""Edits settings for self assign cog. Requires Manage Roles permission.

roxbot/cogs/twitch.py

 					return await channel.send(":video_game:** {} is live!** :video_game:\n{}\n{}".format(
 						member_a.name, member_a.game.name, member_a.game.url))
 
+	@commands.guild_only()
 	@commands.group(aliases=["wl"])
 	@commands.has_permissions(manage_channels=True)
 	async def whitelist(self, ctx):
 		elif option == 'list':
 			return await ctx.send(settings["twitch"]["whitelist"]["list"])
 
+	@commands.guild_only()
 	@commands.has_permissions(manage_channels=True)
 	@commands.command()
 	async def twitch(self, ctx, setting, *, channel: discord.TextChannel = None):

roxbot/cogs/voice.py

 		Duration: {1}
 		Queued by: {0.queued_by}""".format(now_playing, duration)
 		image = np.thumbnail_url
-		footer_text="{}/{} | Volume: {}%".format(time_played, duration, int(now_playing.volume * 100))
+		footer_text = "{}/{} | Volume: {}%".format(time_played, duration, int(now_playing.volume * 100))
 		return cls(
 			title=title,
 			url=np.webpage_url,
 		except AttributeError:
 			raise commands.CommandError("I'm not playing anything.")
 
+	@commands.guild_only()
 	@commands.has_permissions(manage_channels=True)
 	@commands.command()
 	async def voice(self, ctx, setting=None, change=None):