Big Fat Emission PR (#18124)

* amogus

* Revert "amogus"

This reverts commit ebaa99c77b.

* Part 1

* rest of the airlocks

holy shit that took a long time

* part 2

* part 3

finale

* conflict resolution

* fixes warnings

* fixes paneloen airlock emissives

* adds back changes from #18145

* #18085 sprites

* SteelSlayer Review

readded process in status_display, idk why I removed it, it broke some functionality

* future proofing firedoors

Talked with the contributor who added emissive appearances to the codebase. As of now they wont block them unless they spawn as closed, but with future PR merges this code will work.

* solar panel PR conflict resolve

* pain

* small fix

* farie82 suggestions

Co-authored-by: Farie82 <farie82@users.noreply.github.com>

* farie82 suggestions part 2

* farie82 suggestions part 3

* finalle

pog champ ers 2000

* farie82 suggestions the sequel

Co-authored-by: Farie82 <farie82@users.noreply.github.com>

* SteelSlayer Suggestions

Co-authored-by: SteelSlayer <42044220+SteelSlayer@users.noreply.github.com>

Co-authored-by: Farie82 <farie82@users.noreply.github.com>
Co-authored-by: SteelSlayer <42044220+SteelSlayer@users.noreply.github.com>

code/modules/security_levels/keycard_authentication.dm

@@ -25,6 +25,22 @@
 	req_access = list(ACCESS_KEYCARD_AUTH)
 	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | UNACIDABLE | ACID_PROOF
 
+/obj/machinery/keycard_auth/update_icon_state()
+	. = ..()
+
+	if(event_triggered_by || event_source)
+		icon_state = "auth_on"
+	else
+		icon_state = "auth_off"
+
+/obj/machinery/keycard_auth/update_overlays()
+	. = ..()
+	underlays.Cut()
+
+	if(event_triggered_by || event_source)
+		underlays += emissive_appearance(icon, "auth_lightmask")
+
+
 /obj/machinery/keycard_auth/attack_ai(mob/user as mob)
 	to_chat(user, "<span class='warning'>The station AI is not to interact with these devices.</span>")
 	return
@@ -57,9 +73,9 @@
 /obj/machinery/keycard_auth/power_change()
 	if(powered(ENVIRON))
 		stat &= ~NOPOWER
-		icon_state = "auth_off"
 	else
 		stat |= NOPOWER
+	update_icon()
 
 /obj/machinery/keycard_auth/attack_ghost(mob/user)
 	ui_interact(user)
@@ -115,12 +131,14 @@
 	swiping = FALSE
 	confirmed = FALSE
 	event_source = null
-	icon_state = "auth_off"
 	event_triggered_by = null
 	event_confirmed_by = null
+	set_light(0)
+	update_icon()
 
 /obj/machinery/keycard_auth/proc/broadcast_request()
-	icon_state = "auth_on"
+	update_icon()
+	set_light(1, LIGHTING_MINIMUM_POWER)
 	for(var/obj/machinery/keycard_auth/KA in GLOB.machines)
 		if(KA == src) continue
 		KA.reset()
@@ -138,19 +156,24 @@
 /obj/machinery/keycard_auth/proc/receive_request(obj/machinery/keycard_auth/source)
 	if(stat & (BROKEN|NOPOWER))
 		return
+
+	set_light(1, LIGHTING_MINIMUM_POWER)
+
 	event_source = source
 	busy = TRUE
 	active = TRUE
 	SStgui.update_uis(src)
-	icon_state = "auth_on"
+	update_icon()
 
 	sleep(confirm_delay)
 
 	event_source = null
-	icon_state = "auth_off"
+	update_icon()
 	active = FALSE
 	busy = FALSE
 
+	set_light(0)
+
 /obj/machinery/keycard_auth/proc/trigger_event()
 	switch(event)
 		if("Red Alert")

code/modules/security_levels/security_levels.dm

@@ -123,6 +123,7 @@ GLOBAL_DATUM_INIT(security_announcement_down, /datum/announcement/priority/secur
 	for(var/obj/machinery/firealarm/FA in GLOB.machines)
 		if(is_station_contact(FA.z))
 			FA.update_icon()
+			FA.update_fire_light()
 
 /proc/num2seclevel(num)
 	switch(num)