TypeError: Cannot set property 'count' of null

[jackdotjs]

TypeError: Cannot set property 'count' of null

[JackDotJS]

update: this was not a simple fix.

[JackDotJS]

Currently making some better progress.

Discord handles audit log updates in a somewhat strange way. Any message deleted by a moderator gets sent to the audit log, however messages deleted by the post author does NOT get sent to the log. That's fine, just read the audit logs when a messageDelete event is emitted. However, there's more to it than that.

Messages deleted within a short time frame will be combined into a single log entry. This doesn't sound too bad at first. As you could probably guess from my last late-night message (which I posted with much frustration)... it massively complicates matters.

In the event of deleting multiple messages by multiple different users within a short time frame, Discord will still combine log entries even if they are no longer at the top of the list. This means that entries lower in the list will still be updated if within the same time frame.

My initial idea for logging deleted messages was to simply keep the deletion count in the bots memory, and compare that to the latest audit log entry when a message is deleted. Simply put, if the count from Discords latest audit log was higher than the one in memory, it means the message was deleted by a moderator. (It's slightly more complicated than this, but still.) After further investigation of how audit logs work, this system is COMPLETELY unreliable.

I've resorted to keeping a cache of 10 complete log entries in the bots working memory at all times. Every time the bot detects a deleted message, the bot will call a couple loops to get the latest log containing the same user ID of the author of the deleted message, from both Discord and the bots memory.

I wont lie, this is an pretty heavy operation, especially compared to the other event handlers. The total computation time takes anywhere between 0.2-0.25 seconds. Unfortunately, this seems to be the only surefire and reliable way to tell if a message was deleted by a moderator or the message author. Other than that, it seems to be working. Still need to test with multiple messages and multiple authors at once.

[JackDotJS]

Fixed in 26e4a45.
May need additional stress tests.