Possible sentry message lag fixes (#43)

code/modules/defenses/sentry.dm

@@ -62,6 +62,12 @@
 
 	can_be_near_defense = TRUE
 
+	/// Delay sending no ammo messages
+	COOLDOWN_DECLARE(no_ammo_message_cooldown)
+
+	/// Delay for the beep before firing after not firing for a while
+	COOLDOWN_DECLARE(beep_fire_sound_cooldown)
+
 /obj/structure/machinery/defenses/sentry/Initialize()
 	. = ..()
 	spark_system = new /datum/effect_system/spark_spread
@@ -317,14 +323,18 @@
 	if(!(world.time-last_fired >= fire_delay) || !turned_on || !ammo || QDELETED(target))
 		return
 
-	if(world.time-last_fired >= 30 SECONDS) //if we haven't fired for a while, beep first
+	if(COOLDOWN_FINISHED(src, beep_fire_sound_cooldown)) //if we haven't fired for a while, beep first
 		playsound(loc, 'sound/machines/twobeep.ogg', 50, 1)
 
 	if(ammo && ammo.current_rounds <= 0)
-		to_chat(usr, SPAN_WARNING("[name] does not have any ammo."))
+		if(COOLDOWN_FINISHED(src, no_ammo_message_cooldown))
+			visible_message(SPAN_WARNING("[src] beeps steadily and its ammo light blinks red."))
+			COOLDOWN_START(src, no_ammo_message_cooldown, (3 SECONDS))
+
 		return
 
 	last_fired = world.time
+	COOLDOWN_START(src, beep_fire_sound_cooldown, (30 SECONDS))
 
 	if(QDELETED(owner_mob))
 		owner_mob = src

code/modules/projectiles/projectile.dm

@@ -520,8 +520,10 @@
 		else if(!L.lying)
 			animatation_displace_reset(L)
 			if(ammo.sound_miss) playsound_client(L.client, ammo.sound_miss, get_turf(L), 75, TRUE)
-			L.visible_message(SPAN_AVOIDHARM("[src] misses [L]!"),
-				SPAN_AVOIDHARM("[src] narrowly misses you!"), null, 4, CHAT_TYPE_TAKING_HIT)
+			if(COOLDOWN_FINISHED(L, shot_cooldown))
+				L.visible_message(SPAN_AVOIDHARM("[src] misses [L]!"),
+					SPAN_AVOIDHARM("[src] narrowly misses you!"), null, 4, CHAT_TYPE_TAKING_HIT)
+				COOLDOWN_START(L, shot_cooldown, 1 SECONDS)
 			var/log_message = "[src] narrowly missed [key_name(L)]"
 
 			var/mob/living/carbon/shotby = firer