Fixed edge case where RcGcDb spammed the feed

src/discord/queue.py

@@ -54,6 +54,13 @@ class QueueEntry:
 		"""Confirms sent status for a webhook. Returns True if sending to all webhooks has been completed, otherwise False."""
 		self._sent_webhooks.add(webhook)
 
+	def clear_webhook_send_requirement_for(self, webhook: str):
+		"""In case webhook gets removed, this function is called to remove the webhook from the list or required recipients."""
+		try:
+			self.webhooks.remove(webhook)
+		except ValueError:  # best effort
+			pass
+
 	def complete(self) -> bool:
 		return len(self._sent_webhooks) == len(self.webhooks)
 
@@ -91,6 +98,15 @@ class MessageQueue:
 	def cut_messages(self, item_num: int):
 		self._queue = self._queue[item_num:]
 
+	def nuke_all_messages_to_webhook(self, webhook: str):
+		"""Dumb and quick way to make sure no message is intended for removed webhook in case it gets erased from
+		position of domain_manager as well as kill any pending suspensions"""
+		for message in self._queue:
+			message.clear_webhook_send_requirement_for(webhook)
+		for suspension_webhook, suspension_task in self.webhook_suspensions.items():
+			if webhook.split("/")[0] == suspension_webhook.split("/")[0]:
+				suspension_task.cancel()
+
 	def track_discord_error_rate(self, number: float):
 		self.discord_error_rate_tracker = max(0, min(self.discord_error_rate_tracker+number, settings["max_discord_additional_await_time"]))
 
@@ -126,6 +142,7 @@ class MessageQueue:
 			if not isinstance(msg.webhooks, list):
 				raise TypeError('msg.webhook_url in _queue is not a list')
 			for webhook in msg.webhooks:
+				if msg.check_sent_status(webhook) is False:
 					message_dict[webhook].append(msg)  # defaultdict{"dadibadyvbdmadgqueh23/dihjd8agdandashd": [DiscordMessage, DiscordMessage]}
 		return message_dict.items()
 
@@ -206,7 +223,7 @@ class MessageQueue:
 				if method == "POST":
 					msg.webhook = webhook_url
 					msg.wiki.add_message(msg)
-				for queue_message in messages[max(index-len(msg.message_list), 0):index+1]:
+				for queue_message in messages[max(index-len(msg.message_list), 0):index+1]:  # This likely breaks when there are messages from suspended webhooks awaiting sending and a new working webhook is added
 					queue_message.confirm_sent_status(webhook_url)
 			else:
 				if hasattr(msg, "wiki"):  # PATCH and DELETE can not have wiki attribute
@@ -215,10 +232,7 @@ class MessageQueue:
 						logger.debug("Found webhook ID in webhook_suspensions, nuking it.")
 						await msg.wiki.remove_webhook_from_db(webhook_url, "Attempts to send a message to a webhook result in client error.", send_reason=False)
 						for message in messages:
-							try:
+							message.clear_webhook_send_requirement_for(webhook_url)
-								self._queue.remove(message)
-							except ValueError:
-								logger.exception("Message could not be found in the queue")
 						self.webhook_suspensions[webhook_id].cancel()
 					else:
 						self.webhook_suspensions[webhook_id] = asyncio.create_task(self.suspension_check(webhook_url), name="DC Sus Check for {}".format(webhook_id))

src/domain_manager.py

@@ -10,6 +10,7 @@ import logging
 import asyncpg
 import asyncio
 
+from src.misc import flatten_lists
 from src.discord.queue import messagequeue
 from src.exceptions import NoDomain
 from src.config import settings
@@ -76,12 +77,19 @@ class DomainManager:
         if split_payload[0] == "ADD":
             await self.new_wiki(Wiki(split_payload[1], safe_type_for_id(split_payload[2], int), safe_type_for_id(split_payload[3], str)))
         elif split_payload[0] == "REMOVE":
+            webhook_diff = set()
             try:
                 results = await connection.fetch("SELECT * FROM rcgcdb WHERE wiki = $1;", split_payload[1])
                 if len(results) > 0:  # If there are still webhooks for this wiki - just update its targets
-                    await self.return_domain(self.get_domain(split_payload[1])).get_wiki(split_payload[1]).update_targets()
+                    wiki_obj: Wiki = self.return_domain(self.get_domain(split_payload[1])).get_wiki(split_payload[1], None)
+                    if wiki_obj is not None:
+                        flattened_set_of_webhooks = set(flatten_lists(wiki_obj.rc_targets.values())).union(set(flatten_lists(wiki_obj.discussion_targets.values())))
+                        await wiki_obj.update_targets()
+                        webhook_diff = flattened_set_of_webhooks - set(flatten_lists(wiki_obj.rc_targets.values())).union(set(flatten_lists(wiki_obj.discussion_targets.values())))
                 else:
                     self.remove_wiki(split_payload[1])
+                for removed_webhook in webhook_diff:
+                    messagequeue.nuke_all_messages_to_webhook(removed_webhook)
             except asyncpg.IdleSessionTimeoutError:
                 logger.error("Couldn't check amount of webhooks with {} wiki!".format(split_payload[1]))
                 return

src/misc.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import functools
 import json
+import typing
 from functools import cache
 from html.parser import HTMLParser
 import base64, re
@@ -140,6 +141,11 @@ def class_searcher(attribs: list) -> str:
 	return ""
 
 
+def flatten_lists(iterable_to_be_flattened: typing.Iterable):
+	"""Flatten lists"""
+	return [item for sub_list in iterable_to_be_flattened for item in sub_list]
+
+
 class ContentParser(HTMLParser):
 	"""ContentPerser is an implementation of HTMLParser that parses output of action=compare&prop=diff API request
 	for two MediaWiki revisions. It extracts the following: