From f46d33c9437af9ac753b1f3d97fc300ac0eb228a Mon Sep 17 00:00:00 2001
From: Jeremy Zhang <jkzhang@uw.edu>
Date: Fri, 22 Sep 2017 01:39:43 +0000
Subject: [PATCH] Delete the messages before fetching new messages

---
 discordbot/fetch_last_messages.py           | 2 ++
 discordbot/titanembeds/database/__init__.py | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/discordbot/fetch_last_messages.py b/discordbot/fetch_last_messages.py
index d2635f2..bc9b8a8 100644
--- a/discordbot/fetch_last_messages.py
+++ b/discordbot/fetch_last_messages.py
@@ -6,6 +6,7 @@ import aiohttp
 import asyncio
 import sys
 import logging
+import gc
 logging.basicConfig(filename='titanbot.log',level=logging.INFO,format='%(asctime)s %(message)s', datefmt='%m/%d/%Y %I:%M:%S %p')
 logging.getLogger('TitanBot')
 logging.getLogger('sqlalchemy')
@@ -72,6 +73,7 @@ class Titan(discord.Client):
             try:
                 if str(channel.type) == "text":
                     print("Processing channel: ID-{} Name-'{}' ServerID-{} Server-'{}'".format(channel.id, channel.name, channel.server.id, channel.server.name))
+                    await self.database.delete_all_messages_from_channel(channel.id)
                     async for message in self.logs_from(channel, limit=50, reverse=True):
                         await self.database.push_message(message)
             except:
diff --git a/discordbot/titanembeds/database/__init__.py b/discordbot/titanembeds/database/__init__.py
index ec4e372..fe4ef23 100644
--- a/discordbot/titanembeds/database/__init__.py
+++ b/discordbot/titanembeds/database/__init__.py
@@ -287,3 +287,9 @@ class DatabaseInterface(object):
                 dbuser.revoked = True
                 session.commit()
                 return "Successfully kicked **{}#{}**!".format(dbuser.username, dbuser.discriminator)
+                
+    async def delete_all_messages_from_channel(self, channel_id):
+        async with threadpool():
+            with self.get_session() as session:
+                session.query(Messages).filter(Messages.channel_id == channel_id).delete()
+                session.commit()
\ No newline at end of file