Adds ghost notification when the singularity is (likely) loose. (#20826)

* let you know when it's (probably) loose

* better checks

* guh

* bwaaah

* Update code/modules/power/singularity/singularity.dm

Co-authored-by: Ryan <80364400+Sirryan2002@users.noreply.github.com>

---------

Co-authored-by: Ryan <80364400+Sirryan2002@users.noreply.github.com>

code/modules/power/singularity/narsie.dm

@@ -117,6 +117,9 @@
 /obj/singularity/narsie/singularity_act() //handled in /obj/singularity/proc/consume
 	return
 
+/obj/singularity/narsie/notify_dead()
+	return
+
 /obj/singularity/narsie/proc/pickcultist() //Narsie rewards his cultists with being devoured first, then picks a ghost to follow. --NEO
 	var/list/cultists = list()
 	var/list/noncultists = list()

code/modules/power/singularity/singularity.dm

@@ -27,6 +27,8 @@
 	var/consumedSupermatter = FALSE //If the singularity has eaten a supermatter shard and can go to stage six
 	var/warps_projectiles = TRUE
 	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | UNACIDABLE | ACID_PROOF | FREEZE_PROOF
+	/// Whether or not we've pinged ghosts
+	var/isnt_shutting_down = FALSE
 
 /obj/singularity/Initialize(mapload, starting_energy = 50)
 	. = ..()
@@ -217,6 +219,7 @@
 				dissipate_delay = 10
 				dissipate_track = 0
 				dissipate_strength = 10
+				notify_dead()
 		if(STAGE_FIVE)//this one also lacks a check for gens because it eats everything
 			current_size = STAGE_FIVE
 			icon = 'icons/effects/288x288.dmi'
@@ -416,6 +419,22 @@
 		C.IgniteMob()
 	return
 
+/obj/singularity/proc/notify_dead()
+	if(isnt_shutting_down)
+		return
+	notify_ghosts(
+		"IT'S LOOSE",
+		ghost_sound = 'sound/machines/warning-buzzer.ogg',
+		source = src,
+		action = NOTIFY_FOLLOW,
+		flashwindow = FALSE,
+		title = "IT'S LOOSE",
+		alert_overlay = image(icon='icons/obj/singularity.dmi', icon_state="singularity_s1")
+	)
+
+	isnt_shutting_down = TRUE
+
+
 
 /obj/singularity/proc/mezzer()
 	for(var/mob/living/carbon/M in oviewers(8, src))