[V2] Add modclean

Thanks sitryk.

modclean/info.json

@@ -0,0 +1,8 @@
+{
+    "AUTHOR" : "aikaterna and sitryk",
+    "INSTALL_MSG" : "Use `[p]modclean #mod-log` to clean your mod log channel. Edits out Discord invite links from banned or kicked users.",
+    "NAME" : "modclean",
+    "SHORT" : "Clean your mod log channel of Discord invite names.",
+    "DESCRIPTION" : "Clean your mod log channel of Discord invite names.",
+    "TAGS": ["modlog"]
+}

modclean/modclean.py

@@ -0,0 +1,40 @@
+import discord
+import re
+from cogs.utils import checks
+from discord.ext import commands
+
+
+class ModClean:
+    def __init__(self, bot):
+        self.bot = bot
+
+    @commands.command(no_pm=True, pass_context=True)
+    @checks.is_owner()
+    async def modclean(self, ctx, modchannel: discord.Channel = None):
+        """Clean a v2 mod-log channel of invite names."""
+        if not modchannel:
+            return await self.bot.say(
+                "Please use the mod channel in the command. ({}modclean #channelname)".format(
+                    ctx.prefix
+                )
+            )
+
+        IL_raw = r"(discordapp.com/invite|discord.me|discord.gg)(?:/#)?(?:/invite)?/([a-z0-9\-]+)"
+        InvLink = re.compile(IL_raw, re.I)
+
+        try:
+            async for m in self.bot.logs_from(modchannel, 100):
+                if not (m.author == ctx.message.server.me):
+                    continue
+                elif InvLink.search(m.content) is None:
+                    continue
+                else:
+                    new_cont = InvLink.sub("[REMOVED LINK]", m.content)
+                    await self.bot.edit_message(m, new_cont)
+        except discord.errors.Forbidden:
+            return await self.bot.say("No permissions to read that channel.")
+        await self.bot.say("Done.")
+
+
+def setup(bot):
+    bot.add_cog(ModClean(bot))