[MIRROR] Stowaway Changelings (Latejoin Changelings) [MDB IGNORE] (#20921)

* Stowaway Changelings (Latejoin Changelings) (#74670)

## About The Pull Request

Adds a latejoin form of Changeling flavored as a stowaway.

## Why It's Good For The Game

We don't have a latejoin form of Changelings. It ups the paranoia that
anyone can be a Changeling, latejoin or not. They're also one of the few
non-progression antagonists which would work perfectly as a late join.

## Changelog

🆑
add: Stowaway Changelings will now appear as a late join form of
Changeling.
/🆑

---------

Co-authored-by: Fikou <23585223+Fikou@ users.noreply.github.com>
Co-authored-by: Mothblocks <35135081+Mothblocks@ users.noreply.github.com>
Co-authored-by: Jeremiah <42397676+jlsnow301@ users.noreply.github.com>

* Stowaway Changelings (Latejoin Changelings)

* Delete screenshot_antag_icons_stowawaychangeling.png

---------

Co-authored-by: iwishforducks <65363339+iwishforducks@users.noreply.github.com>
Co-authored-by: Fikou <23585223+Fikou@ users.noreply.github.com>
Co-authored-by: Mothblocks <35135081+Mothblocks@ users.noreply.github.com>
Co-authored-by: Jeremiah <42397676+jlsnow301@ users.noreply.github.com>
Co-authored-by: Gandalf <9026500+Gandalf2k15@users.noreply.github.com>

code/__DEFINES/role_preferences.dm

@@ -52,6 +52,7 @@
 #define ROLE_HERETIC_SMUGGLER "Heretic Smuggler"
 #define ROLE_PROVOCATEUR "Provocateur"
 #define ROLE_SYNDICATE_INFILTRATOR "Syndicate Infiltrator"
+#define ROLE_STOWAWAY_CHANGELING "Stowaway Changeling"
 
 // Other roles
 #define ROLE_SYNDICATE "Syndicate"
@@ -166,6 +167,7 @@ GLOBAL_LIST_INIT(special_roles, list(
 	ROLE_HERETIC_SMUGGLER = 0,
 	ROLE_PROVOCATEUR = 14,
 	ROLE_SYNDICATE_INFILTRATOR = 0,
+	ROLE_STOWAWAY_CHANGELING = 0,
 
 	// I'm not too sure why these are here, but they're not moving.
 	ROLE_PAI = 0,

code/game/gamemodes/dynamic/dynamic_rulesets_latejoin.dm

@@ -224,3 +224,35 @@
 	new_heretic.knowledge_points = min(new_heretic.knowledge_points, 5)
 
 	return TRUE
+
+/// Ruleset for latejoin changelings
+/datum/dynamic_ruleset/latejoin/stowaway_changeling
+	name = "Stowaway Changeling"
+	antag_datum = /datum/antagonist/changeling
+	antag_flag = ROLE_STOWAWAY_CHANGELING
+	antag_flag_override = ROLE_CHANGELING
+	protected_roles = list(
+		JOB_CAPTAIN,
+		JOB_DETECTIVE,
+		JOB_HEAD_OF_PERSONNEL,
+		JOB_HEAD_OF_SECURITY,
+		JOB_PRISONER,
+		JOB_SECURITY_OFFICER,
+		JOB_WARDEN,
+	)
+	restricted_roles = list(
+		JOB_AI,
+		JOB_CYBORG,
+	)
+	required_candidates = 1
+	weight = 2
+	cost = 12
+	requirements = list(101,101,40,40,20,20,10,10,10,10)
+	repeatable = TRUE
+
+/datum/dynamic_ruleset/latejoin/stowaway_changeling/execute()
+	var/mob/picked_mob = pick(candidates)
+	assigned += picked_mob.mind
+	picked_mob.mind.special_role = antag_flag
+	picked_mob.mind.add_antag_datum(antag_datum)
+	return TRUE

config/dynamic.json

@@ -158,6 +158,10 @@
 
 		"Heretic Smuggler": {
 			"weight": 0
+		},
+
+		"Stowaway Changeling": {
+			"weight": 0
 		}
 	}
 }

tgui/packages/tgui/interfaces/PreferencesMenu/antagonists/antagonists/stowawaychangeling.ts

@@ -0,0 +1,18 @@
+import { Antagonist, Category } from '../base';
+import { multiline } from 'common/string';
+import { CHANGELING_MECHANICAL_DESCRIPTION } from './changeling';
+
+const Stowaway_Changeling: Antagonist = {
+  key: 'stowawaychangeling',
+  name: 'Stowaway Changeling',
+  description: [
+    multiline`
+      A Changeling that found its way onto the shuttle
+      unbeknownst to the crewmembers on board.
+    `,
+    CHANGELING_MECHANICAL_DESCRIPTION,
+  ],
+  category: Category.Latejoin,
+};
+
+export default Stowaway_Changeling;