Mech-dominating Malf AIs will have their Doomsday timer stopped when …

…their deactivated core is destroyed (tgstation#88528)

code/game/objects/structures/ai_core.dm

@@ -77,10 +77,13 @@
 	icon_state = "ai-empty"
 	anchored = TRUE
 	state = AI_READY_CORE
+	var/mob/living/silicon/ai/attached_ai
 
-/obj/structure/ai_core/deactivated/Initialize(mapload, skip_mmi_creation = FALSE, posibrain = FALSE)
+/obj/structure/ai_core/deactivated/Initialize(mapload, skip_mmi_creation = FALSE, posibrain = FALSE, linked_ai)
 	. = ..()
 	circuit = new(src)
+	if(linked_ai)
+		attached_ai = linked_ai
 	if(skip_mmi_creation)
 		return
 	if(posibrain)
@@ -90,6 +93,16 @@
 		core_mmi.brain = new(core_mmi)
 		core_mmi.update_appearance()
 
+/obj/structure/ai_core/deactivated/Destroy()
+	if(attached_ai)
+		attached_ai.linked_core = null
+		attached_ai = null
+	. = ..()
+
+/obj/structure/ai_core/deactivated/proc/disable_doomsday(datum/source)
+	SIGNAL_HANDLER
+	attached_ai.ShutOffDoomsdayDevice()
+
 /obj/structure/ai_core/latejoin_inactive
 	name = "networked AI core"
 	desc = "This AI core is connected by bluespace transmitters to NTNet, allowing for an AI personality to be downloaded to it on the fly mid-shift."

code/modules/antagonists/blob/blobstrains/_blobstrain.dm

@@ -22,8 +22,7 @@ GLOBAL_LIST_INIT(valid_blobstrains, subtypesof(/datum/blobstrain) - list(/datum/
 	var/message_living = null
 	/// Stores world.time to figure out when to next give resources
 	var/resource_delay = 0
-	/// For blob-mobs and extinguishing-based effects
-	var/fire_based = FALSE
+	///The blob overmind eye mob used to control the spread
 	var/mob/eye/blob/overmind
 	/// The amount of health regenned on core_process
 	var/base_core_regen = BLOB_CORE_HP_REGEN

code/modules/antagonists/blob/blobstrains/blazing_oil.dm

@@ -12,7 +12,6 @@
 	message = "The blob splashes you with burning oil"
 	message_living = ", and you feel your skin char and melt"
 	reagent = /datum/reagent/blob/blazing_oil
-	fire_based = TRUE
 
 /datum/blobstrain/reagent/blazing_oil/extinguish_reaction(obj/structure/blob/B)
 	B.take_damage(4.5, BURN, ENERGY)

code/modules/antagonists/malf_ai/malf_ai_modules.dm

@@ -904,12 +904,12 @@ GLOBAL_LIST_INIT(malf_modules, subtypesof(/datum/ai_module/malf))
 /datum/ai_module/malf/upgrade/mecha_domination
 	name = "Unlock Mech Domination"
 	description = "Allows you to hack into a mech's onboard computer, shunting all processes into it and ejecting any occupants. \
-		Do not allow the mech to leave the station's vicinity or allow it to be destroyed. \
-		Upgrade is done immediately upon purchase."
+		Upgrade is done immediately upon purchase. Do not allow the mech to leave the station's vicinity or allow it to be destroyed. \
+		If your core is destroyed, you will be lose connection with the Doomsday Device and the countdown will cease."
 	cost = 30
 	upgrade = TRUE
 	unlock_text = span_notice("Virus package compiled. Select a target mech at any time. <b>You must remain on the station at all times. \
-		Loss of signal will result in total system lockout.</b>")
+		Loss of signal will result in total system lockout. If your inactive core is destroyed, you will be lose connection with the Doomsday Device and the countdown will cease.</b>")
 	unlock_sound = 'sound/vehicles/mecha/nominal.ogg'
 
 /datum/ai_module/malf/upgrade/mecha_domination/upgrade(mob/living/silicon/ai/AI)

code/modules/antagonists/nukeop/equipment/pinpointer.dm

@@ -43,7 +43,10 @@
 			for(var/V in GLOB.ai_list)
 				var/mob/living/silicon/ai/A = V
 				if(A.nuking)
-					target = A
+					if(A.linked_core)
+						target = A.linked_core
+					else
+						target = A
 			for(var/obj/machinery/power/apc/apc as anything in SSmachines.get_machines_by_type_and_subtypes(/obj/machinery/power/apc))
 				if(apc.malfhack && apc.occupier)
 					target = apc

code/modules/vehicles/mecha/mecha_ai_interaction.dm

@@ -66,7 +66,9 @@
 			return
 
 		if(AI_MECH_HACK) //Called by AIs on the mech
-			AI.linked_core = new /obj/structure/ai_core/deactivated(AI.loc)
+			var/obj/structure/ai_core/deactivated/deactivated_core = new(AI.loc, FALSE, FALSE, AI)
+			AI.linked_core = deactivated_core
+			AI.linked_core.RegisterSignal(deactivated_core, COMSIG_ATOM_DESTRUCTION, TYPE_PROC_REF(/obj/structure/ai_core/deactivated, disable_doomsday)) //Protect that core! The structure goes bye-bye when we re-shunt back in so no need for cleanup.
 			AI.linked_core.remote_ai = AI
 			if(AI.can_dominate_mechs && LAZYLEN(occupants)) //Oh, I am sorry, were you using that?
 				to_chat(AI, span_warning("Occupants detected! Forced ejection initiated!"))