From 032511a03e7a787e9d5670361fad36104ea35cbf Mon Sep 17 00:00:00 2001
From: CitadelStationBot <citadelstationcommunity@gmail.com>
Date: Mon, 5 Mar 2018 15:02:10 -0600
Subject: [PATCH] [MIRROR] Added a cooldown to being shown hud images (#5810)

* Merge pull request #36144 from Cruix/hud_images_cd

Added a cooldown to being shown hud images

* Added a cooldown to being shown hud images
---
 code/__DEFINES/atom_hud.dm |  2 ++
 code/datums/hud.dm         | 29 ++++++++++++++++++++++++-----
 2 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/code/__DEFINES/atom_hud.dm b/code/__DEFINES/atom_hud.dm
index 017a3f8bfe..0c5edf5b99 100644
--- a/code/__DEFINES/atom_hud.dm
+++ b/code/__DEFINES/atom_hud.dm
@@ -55,3 +55,5 @@
 #define NOTIFY_JUMP "jump"
 #define NOTIFY_ATTACK "attack"
 #define NOTIFY_ORBIT "orbit"
+
+#define ADD_HUD_TO_COOLDOWN 20 //cooldown for being shown the images for any particular data hud
diff --git a/code/datums/hud.dm b/code/datums/hud.dm
index fc6c09be14..17632acba0 100644
--- a/code/datums/hud.dm
+++ b/code/datums/hud.dm
@@ -32,6 +32,9 @@ GLOBAL_LIST_INIT(huds, list(
 	var/list/mob/hudusers = list() //list with all mobs who can see the hud
 	var/list/hud_icons = list() //these will be the indexes for the atom's hud_list
 
+	var/list/next_time_allowed = list() //mobs associated with the next time this hud can be added to them
+	var/list/queued_to_see = list() //mobs that have triggered the cooldown and are queued to see the hud, but do not yet
+
 /datum/atom_hud/New()
 	GLOB.all_huds += src
 
@@ -48,8 +51,11 @@ GLOBAL_LIST_INIT(huds, list(
 		return
 	if (!--hudusers[M])
 		hudusers -= M
-		for(var/atom/A in hudatoms)
-			remove_from_single_hud(M, A)
+		if(queued_to_see[M])
+			queued_to_see -= M
+		else
+			for(var/atom/A in hudatoms)
+				remove_from_single_hud(M, A)
 
 /datum/atom_hud/proc/remove_from_hud(atom/A)
 	if(!A)
@@ -68,13 +74,26 @@ GLOBAL_LIST_INIT(huds, list(
 /datum/atom_hud/proc/add_hud_to(mob/M)
 	if(!M)
 		return
-	if (!hudusers[M])
+	if(!hudusers[M])
 		hudusers[M] = 1
-		for(var/atom/A in hudatoms)
-			add_to_single_hud(M, A)
+		if(next_time_allowed[M] > world.time)
+			if(!queued_to_see[M])
+				addtimer(CALLBACK(src, .proc/show_hud_images_after_cooldown, M), next_time_allowed[M] - world.time)
+				queued_to_see[M] = TRUE
+		else
+			next_time_allowed[M] = world.time + ADD_HUD_TO_COOLDOWN
+			for(var/atom/A in hudatoms)
+				add_to_single_hud(M, A)
 	else
 		hudusers[M]++
 
+/datum/atom_hud/proc/show_hud_images_after_cooldown(M)
+	if(queued_to_see[M])
+		queued_to_see -= M
+		next_time_allowed[M] = world.time + ADD_HUD_TO_COOLDOWN
+		for(var/atom/A in hudatoms)
+			add_to_single_hud(M, A)
+
 /datum/atom_hud/proc/add_to_hud(atom/A)
 	if(!A)
 		return FALSE