From 743829eb05999014aba5019097347d50832ae2c3 Mon Sep 17 00:00:00 2001
From: Will <7099514+Willburd@users.noreply.github.com>
Date: Thu, 18 Sep 2025 13:12:22 -0400
Subject: [PATCH] disposal atom flushed signal (#18527)

---
 code/__defines/dcs/signals.dm             | 2 ++
 code/modules/recycling/disposal_holder.dm | 1 +
 2 files changed, 3 insertions(+)

diff --git a/code/__defines/dcs/signals.dm b/code/__defines/dcs/signals.dm
index 206a9a416cb..f1ee0a6d591 100644
--- a/code/__defines/dcs/signals.dm
+++ b/code/__defines/dcs/signals.dm
@@ -858,6 +858,8 @@
 #define COMSIG_ATOM_SET_LIGHT_FLAGS "atom_set_light_flags"
 ///Called right after the atom changes the value of light_flags to a different one, from base of [/atom/proc/set_light_flags]: (old_flags)
 #define COMSIG_ATOM_UPDATE_LIGHT_FLAGS "atom_update_light_flags"
+///Called right after the atom is flushed into a disposal holder and sent through the disposal network: (/obj/structure/disposalholder)
+#define COMSIG_ATOM_DISPOSAL_FLUSHED "atom_disposal_flushed"
 
 // /datum/element/light_eater
 ///from base of [/datum/element/light_eater/proc/table_buffet]: (list/light_queue, datum/light_eater)
diff --git a/code/modules/recycling/disposal_holder.dm b/code/modules/recycling/disposal_holder.dm
index db6f549df67..d076fadd14f 100644
--- a/code/modules/recycling/disposal_holder.dm
+++ b/code/modules/recycling/disposal_holder.dm
@@ -53,6 +53,7 @@
 		if(istype(AM, /mob/living/silicon/robot/drone))
 			var/mob/living/silicon/robot/drone/drone = AM
 			src.destinationTag = drone.mail_destination
+		SEND_SIGNAL(AM, COMSIG_ATOM_DISPOSAL_FLUSHED, src)
 
 // movement process, persists while holder is moving through pipes
 /obj/structure/disposalholder/proc/move()