Replaces istypes with the proper tool_behaviour checks. (#40414)

code/modules/modular_computers/computers/item/computer.dm

@@ -385,7 +385,7 @@
 		if(install_component(W, user))
 			return
 
-	if(istype(W, /obj/item/wrench))
+	if(W.tool_behaviour == TOOL_WRENCH)
 		if(all_components.len)
 			to_chat(user, "<span class='warning'>Remove all components from \the [src] before disassembling it.</span>")
 			return
@@ -395,7 +395,7 @@
 		qdel(src)
 		return
 
-	if(istype(W, /obj/item/weldingtool))
+	if(W.tool_behaviour == TOOL_WELDER)
 		if(obj_integrity == max_integrity)
 			to_chat(user, "<span class='warning'>\The [src] does not require repairs.</span>")
 			return
@@ -409,7 +409,7 @@
 			to_chat(user, "<span class='notice'>You repair \the [src].</span>")
 		return
 
-	if(istype(W, /obj/item/screwdriver))
+	if(W.tool_behaviour == TOOL_SCREWDRIVER)
 		if(!all_components.len)
 			to_chat(user, "<span class='warning'>This device doesn't have any components installed.</span>")
 			return

code/modules/modular_computers/hardware/_hardware.dm

@@ -32,13 +32,6 @@
 
 
 /obj/item/computer_hardware/attackby(obj/item/I, mob/living/user)
-	// Multitool. Runs diagnostics
-	if(istype(I, /obj/item/multitool))
-		to_chat(user, "***** DIAGNOSTICS REPORT *****")
-		diagnostics(user)
-		to_chat(user, "******************************")
-		return 1
-
 	// Cable coil. Works as repair method, but will probably require multiple applications and more cable.
 	if(istype(I, /obj/item/stack/cable_coil))
 		var/obj/item/stack/S = I
@@ -51,10 +44,16 @@
 		return 1
 
 	if(try_insert(I, user))
-		return 1
+		return TRUE
 
 	return ..()
 
+/obj/item/computer_hardware/multitool_act(mob/living/user, obj/item/I)
+	to_chat(user, "***** DIAGNOSTICS REPORT *****")
+	diagnostics(user)
+	to_chat(user, "******************************")
+	return TRUE
+
 // Called on multitool click, prints diagnostic information to the user.
 /obj/item/computer_hardware/proc/diagnostics(var/mob/user)
 	to_chat(user, "Hardware Integrity Test... (Corruption: [damage]/[max_damage]) [damage > damage_failure ? "FAIL" : damage > damage_malfunction ? "WARN" : "PASS"]")

code/modules/modular_computers/hardware/ai_slot.dm

@@ -62,7 +62,7 @@
 /obj/item/computer_hardware/ai_slot/attackby(obj/item/I, mob/living/user)
 	if(..())
 		return
-	if(istype(I, /obj/item/screwdriver))
+	if(I.tool_behaviour == TOOL_SCREWDRIVER)
 		to_chat(user, "<span class='notice'>You press down on the manual eject button with \the [I].</span>")
 		try_eject(,user,1)
 		return

code/modules/modular_computers/hardware/card_slot.dm

@@ -100,7 +100,7 @@
 /obj/item/computer_hardware/card_slot/attackby(obj/item/I, mob/living/user)
 	if(..())
 		return
-	if(istype(I, /obj/item/screwdriver))
+	if(I.tool_behaviour == TOOL_SCREWDRIVER)
 		to_chat(user, "<span class='notice'>You press down on the manual eject button with \the [I].</span>")
 		try_eject(0,user)
 		return