[MIRROR] Changing changeling (Refactor) (#11142)

Co-authored-by: Cameron Lennox <killer65311@gmail.com>
Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>

code/modules/resleeving/autoresleever.dm

@@ -165,6 +165,7 @@
 	new_character.key = player_key
 
 	//Were they any particular special role? If so, copy.
+
 	if(new_character.mind)
 		new_character.mind.loaded_from_ckey = picked_ckey
 		new_character.mind.loaded_from_slot = picked_slot
@@ -172,6 +173,8 @@
 		if(antag_data)
 			antag_data.add_antagonist(new_character.mind)
 			antag_data.place_mob(new_character)
+		if(new_character.mind.antag_holder)
+			new_character.mind.antag_holder.apply_antags(new_character)
 
 	for(var/lang in ghost_client.prefs.alternate_languages)
 		var/datum/language/chosen_language = GLOB.all_languages[lang]

code/modules/resleeving/computers.dm

@@ -387,6 +387,12 @@
 								active_mr = null
 								return
 
+							//Changeling lock.
+							if(sleever.get_occupant().changeling_locked && !is_changeling(active_mr.mind_ref))
+								set_temp("Error: Mind incompatible with body", "danger")
+								active_mr = null
+								return TRUE
+
 							var/list/subtargets = list()
 							for(var/mob/living/carbon/human/H in sleever.get_occupant())
 								if(H.resleeve_lock && active_mr.ckey != H.resleeve_lock)

code/modules/resleeving/infocore_records.dm

@@ -4,6 +4,7 @@
 ////////////////////////////////
 
 /mob/living/carbon/human/var/resleeve_lock
+/mob/living/carbon/human/var/changeling_locked
 /mob/living/carbon/human/var/original_player
 
 /////// Mind-backup record ///////
@@ -79,6 +80,7 @@
 	//These may or may not be set, mostly irrelevant since it's just a body record.
 	var/ckey
 	var/locked
+	var/changeling_locked
 	var/client/client_ref
 	var/datum/mind/mind_ref
 	var/synthetic
@@ -123,6 +125,11 @@
 	//Person OOCly doesn't want people impersonating them
 	locked = ckeylock
 
+	//The mob is a changeling, don't allow anyone to possess them. Not using locked as locked gives OOC notices.
+	if(is_changeling(M))
+		changeling_locked = TRUE
+
+
 	var/datum/species/S = GLOB.all_species["[M.dna.species]"]
 	if(S)
 		// Force ckey locking if species is whitelisted

code/modules/resleeving/machines.dm

@@ -493,8 +493,15 @@
 	if(!occupant.mind)
 		log_debug("[occupant] didn't have a mind to check for vore_death, which may be problematic.")
 
-	if(occupant.mind && occupant.original_player && ckey(occupant.mind.key) != occupant.original_player)
-		log_and_message_admins("is now a cross-sleeved character. Body originally belonged to [occupant.real_name]. Mind is now [occupant.mind.name].",occupant)
+	if(occupant.mind)
+		if(occupant.original_player && ckey(occupant.mind.key) != occupant.original_player)
+			log_and_message_admins("is now a cross-sleeved character. Body originally belonged to [occupant.real_name]. Mind is now [occupant.mind.name].",occupant)
+		var/datum/antagonist/antag_data = get_antag_data(occupant.mind.special_role)
+		if(antag_data)
+			antag_data.add_antagonist(occupant.mind)
+			antag_data.place_mob(occupant)
+		if(occupant.mind.antag_holder)
+			occupant.mind.antag_holder.apply_antags(occupant)
 
 	if(original_occupant)
 		occupant = original_occupant