From 705e8788ddeceef06d32fe9b98cc05c82b73b727 Mon Sep 17 00:00:00 2001
From: morrowwolf <darthbane97@gmail.com>
Date: Fri, 14 Jul 2023 06:08:35 -0400
Subject: [PATCH] Invisible lurker pushing (#3857)

# About the pull request

This PR makes it so when you collide with a human as an invisible lurker
you will become visible.

# Explain why it's good for the game

Being pushed by a fast and barely visible xeno is super cheesy.

# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog

:cl: Morrow
balance: Lurkers now lose their invisibility when they run into a person
/:cl:

---------

Co-authored-by: harryob <me@harryob.live>
Co-authored-by: BeagleGaming1 <56142455+BeagleGaming1@users.noreply.github.com>
---
 .../mob/living/carbon/xenomorph/Xenomorph.dm      |  5 +++++
 .../mob/living/carbon/xenomorph/castes/Lurker.dm  | 15 +++++++++++++++
 .../xenomorph/mutators/behavior_delegate.dm       |  4 ++++
 3 files changed, 24 insertions(+)

diff --git a/code/modules/mob/living/carbon/xenomorph/Xenomorph.dm b/code/modules/mob/living/carbon/xenomorph/Xenomorph.dm
index 40d38c24085a..0b2625882ed8 100644
--- a/code/modules/mob/living/carbon/xenomorph/Xenomorph.dm
+++ b/code/modules/mob/living/carbon/xenomorph/Xenomorph.dm
@@ -1087,3 +1087,8 @@
 		if(D)
 			color_override = D.color
 	new /obj/effect/temp_visual/dir_setting/bloodsplatter/xenosplatter(loc, splatter_dir, duration, color_override)
+
+/mob/living/carbon/xenomorph/Collide(atom/movable/movable_atom)
+	. = ..()
+	if(behavior_delegate)
+		behavior_delegate.on_collide(movable_atom)
diff --git a/code/modules/mob/living/carbon/xenomorph/castes/Lurker.dm b/code/modules/mob/living/carbon/xenomorph/castes/Lurker.dm
index fb75ed3900ac..5010857301e0 100644
--- a/code/modules/mob/living/carbon/xenomorph/castes/Lurker.dm
+++ b/code/modules/mob/living/carbon/xenomorph/castes/Lurker.dm
@@ -151,3 +151,18 @@
 	. = list()
 	var/invis_message = (invis_start_time == -1) ? "N/A" : "[(invis_duration-(world.time - invis_start_time))/10] seconds."
 	. += "Invisibility Time Left: [invis_message]"
+
+/datum/behavior_delegate/lurker_base/on_collide(atom/movable/movable_atom)
+	. = ..()
+
+	if(!ishuman(movable_atom))
+		return
+
+	if(!bound_xeno || !bound_xeno.stealth)
+		return
+
+	var/datum/action/xeno_action/onclick/lurker_invisibility/lurker_invisibility_action = get_xeno_action_by_type(bound_xeno, /datum/action/xeno_action/onclick/lurker_invisibility)
+	if(!lurker_invisibility_action)
+		return
+
+	lurker_invisibility_action.invisibility_off()
diff --git a/code/modules/mob/living/carbon/xenomorph/mutators/behavior_delegate.dm b/code/modules/mob/living/carbon/xenomorph/mutators/behavior_delegate.dm
index 1cb563461138..53ca8c3a74da 100644
--- a/code/modules/mob/living/carbon/xenomorph/mutators/behavior_delegate.dm
+++ b/code/modules/mob/living/carbon/xenomorph/mutators/behavior_delegate.dm
@@ -104,3 +104,7 @@
 /// Used to override an intent for some abilities that must force harm on next attack_alien()
 /datum/behavior_delegate/proc/override_intent(mob/living/carbon/target_carbon)
 	return bound_xeno.a_intent
+
+/// Used to do something when a xeno collides with a movable atom
+/datum/behavior_delegate/proc/on_collide(atom/movable/movable_atom)
+	return