From 78d9469b278e9f53f673ba67c125aa00f5dadf12 Mon Sep 17 00:00:00 2001
From: Dragory <2606411+Dragory@users.noreply.github.com>
Date: Fri, 10 Apr 2020 21:27:31 +0300
Subject: [PATCH] Fix rare edge case crash in automod

---
 backend/src/plugins/Automod/Automod.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/backend/src/plugins/Automod/Automod.ts b/backend/src/plugins/Automod/Automod.ts
index 2c89f63d..214656ff 100644
--- a/backend/src/plugins/Automod/Automod.ts
+++ b/backend/src/plugins/Automod/Automod.ts
@@ -1447,6 +1447,13 @@ export class AutomodPlugin extends ZeppelinPlugin<TConfigSchema, ICustomOverride
       for (const [name, rule] of Object.entries(config.rules)) {
         const matchResult = await this.matchRuleToMessage(rule, msg);
         if (matchResult) {
+          // Make sure the message still exists in our database when we try to apply actions on it.
+          // In high stress situations, such as raids, detection can be delayed and automod might try to act on messages
+          // we no longer have in our database, i.e. messages deleted over 5 minutes go. Since this is an edge case and
+          // undefined behaviour, don't apply actions on that message.
+          const savedMsg = await this.savedMessages.find(msg.id);
+          if (!savedMsg) return;
+
           await this.applyActionsOnMatch(rule, matchResult);
           break; // Don't apply multiple rules to the same message
         }