SSD Indicators will be real in 2020

code/modules/mob/living/carbon/human/examine.dm

@@ -327,7 +327,7 @@
 			if(!key)
 				msg += "<span class='deadsay'>[t_He] [t_is] totally catatonic. The stresses of life in deep-space must have been too much for [t_him]. Any recovery is unlikely.</span>\n"
 			else if(!client)
-				msg += "<span class='warning'>[t_He] appears to be suffering from SSD - Space Sleep Disorder. [t_He] may snap out of it at any time! Or maybe never. It's best to leave [t_him] be.</span>\n"
+				msg += "<span class='warning'>[t_He] [t_has] been suffering from SSD - Space Sleep Disorder - for [trunc(((world.time - lastclienttime) / (1 MINUTES)))] minutes. [t_He] may snap out of it at any time! Or maybe never. It's best to leave [t_him] be.</span>\n"
 	if (length(msg))
 		. += "<span class='warning'>[msg.Join("")]</span>"
 

code/modules/mob/living/carbon/life.dm

@@ -25,9 +25,12 @@
 		if(.) //not dead
 			handle_blood()
 
-		if(isLivingSSD())//if you're disconnected, you're going to sleep
-			if(AmountSleeping() < 20)
-				AdjustSleeping(20)//adjust every 10 seconds
+		if(isLivingSSD()) // If you're disconnected, you're going to sleep
+			if(trunc((world.time - lastclienttime) / (3 MINUTES)) > 0) // After a three minute grace period, your character will fall asleep
+				if(AmountSleeping() < 20)
+					AdjustSleeping(20) // Adjust every 10 seconds
+				if(ssd_indicator)
+					cut_overlay(GLOB.ssd_indicator_overlay) // Prevents chronically SSD players from breaking immersion
 
 		if(stat != DEAD)
 			var/bprv = handle_bodyparts()

code/modules/mob/living/living.dm

@@ -1410,6 +1410,31 @@
 	if(player_logged && stat != DEAD)
 		return TRUE
 
+// The above code is kept to prevent old SSD behavior from breaking, while the code below is dedicated to the SSD Indicator
+
+GLOBAL_VAR_INIT(ssd_indicator_overlay, mutable_appearance('icons/mob/ssd_indicator.dmi', "default0", RUNECHAT_PLANE))
+
+/mob/living
+	var/ssd_indicator = FALSE
+	var/lastclienttime = 0
+
+/mob/living/proc/set_ssd_indicator(var/state)
+	if(state == ssd_indicator)
+		return
+	ssd_indicator = state
+	if(ssd_indicator)
+		add_overlay(GLOB.ssd_indicator_overlay)
+	else
+		cut_overlay(GLOB.ssd_indicator_overlay)
+
+/mob/living/Login()
+	. = ..()
+	set_ssd_indicator(FALSE)
+
+/mob/living/Logout()
+	lastclienttime = world.time
+	set_ssd_indicator(TRUE)
+
 /mob/living/vv_get_header()
 	. = ..()
 	var/refid = REF(src)