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Experiment with replacing weakrefs in AI blackboard with deleting signals, ideally making it easier to work with and harder to cause hard deletes (#74791)

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## About The Pull Request

Replaces weakref usage in AI blackboards with deleting signals

All blackboard var setting must go through setters rather than directly

## Why It's Good For The Game

This both makes it a ton easier to develop AI for, and also makes it
harder for hard deletes to sneak in, as has been seen with recent 515
prs showing hard deletes in AI blackboards

(To quantify "making it easier to develop AI", I found multiple bugs in
existing AI code due to the usage of weakrefs.)

I'm looking for `@Jacquerel` `@tralezab` 's opinions on the matter, also
maybe `@LemonInTheDark` if they're interested

## Changelog

🆑 Melbert
refactor: Mob ai refactored once again
/🆑
This commit is contained in:
MrMelbert
2023-04-23 18:07:17 -05:00
committed by GitHub
parent 23b09f8a14
commit ed2f04f486
92 changed files with 688 additions and 592 deletions
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code/datums/ai/monkey/monkey_controller.dm
+5 -10
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@@ -52,7 +52,7 @@ have ways of interacting with a specific mob and control it.
. = ..()
if(. & AI_CONTROLLER_INCOMPATIBLE)
return
blackboard[BB_MONKEY_AGGRESSIVE] = TRUE //Angry cunt
set_blackboard_key(BB_MONKEY_AGGRESSIVE, TRUE) //Angry cunt
/datum/ai_controller/monkey/TryPossessPawn(atom/new_pawn)
if(!isliving(new_pawn))
@@ -103,8 +103,8 @@ have ways of interacting with a specific mob and control it.
/datum/ai_controller/monkey/proc/TryFindWeapon()
var/mob/living/living_pawn = pawn
if(!locate(/obj/item) in living_pawn.held_items)
blackboard[BB_MONKEY_BEST_FORCE_FOUND] = 0
if(!(locate(/obj/item) in living_pawn.held_items))
set_blackboard_key(BB_MONKEY_BEST_FORCE_FOUND, 0)
if(blackboard[BB_MONKEY_GUN_NEURONS_ACTIVATED] && (locate(/obj/item/gun) in living_pawn.held_items))
// We have a gun, what could we possibly want?
@@ -135,7 +135,7 @@ have ways of interacting with a specific mob and control it.
if(weapon.force < 2) // our bite does 2 damage on avarage, no point in settling for anything less
return FALSE
blackboard[BB_MONKEY_PICKUPTARGET] = weapon
set_blackboard_key(BB_MONKEY_PICKUPTARGET, weapon)
set_movement_target(type, weapon)
if(pickpocket)
queue_behavior(/datum/ai_behavior/monkey_equip/pickpocket)
@@ -145,8 +145,7 @@ have ways of interacting with a specific mob and control it.
///Reactive events to being hit
/datum/ai_controller/monkey/proc/retaliate(mob/living/L)
var/list/enemies = blackboard[BB_MONKEY_ENEMIES]
enemies[WEAKREF(L)] += MONKEY_HATRED_AMOUNT
add_blackboard_key_assoc(BB_MONKEY_ENEMIES, L, MONKEY_HATRED_AMOUNT)
/datum/ai_controller/monkey/proc/on_attacked(datum/source, mob/attacker)
SIGNAL_HANDLER
@@ -175,7 +174,3 @@ have ways of interacting with a specific mob and control it.
/datum/ai_controller/monkey/proc/update_movespeed(mob/living/pawn)
SIGNAL_HANDLER
movement_delay = pawn.cached_multiplicative_slowdown
/datum/ai_controller/monkey/proc/target_del(target)
SIGNAL_HANDLER
blackboard[BB_MONKEY_BLACKLISTITEMS] -= target