[MIRROR] Skips traits that aren't implemented yet. (ABLE TO BE MERGED) (#13165)

* Merge pull request #8655 from MistakeNot4892/traitfix

Skips traits that aren't implemented yet.

* Skips traits that aren't implemented yet.

Co-authored-by: Atermonera <atermonera@gmail.com>

code/modules/client/preference_setup/traits/trait_defines.dm

@@ -7,9 +7,12 @@
 /datum/trait/modifier/apply_trait_post_spawn(mob/living/L)
 	L.add_modifier(modifier_type)
 
+/datum/trait/modifier/is_available()
+	return !!modifier_type
+
 /datum/trait/modifier/generate_desc()
 	var/new_desc = desc
-	if(!modifier_type)
+	if(!is_available())
 		new_desc = "[new_desc] This trait is not implemented yet."
 		return new_desc
 	var/datum/modifier/M = new modifier_type()

code/modules/client/preference_setup/traits/traits.dm

@@ -7,6 +7,9 @@ var/list/trait_categories = list() // The categories available for the trait men
 	//create a list of trait datums
 	for(var/trait_type in typesof(/datum/trait) - list(/datum/trait, /datum/trait/modifier))
 		var/datum/trait/T = new trait_type
+		if(!T.is_available())
+			qdel(T)
+			continue
 
 		if(!T.name)
 			error("Trait Menu - Missing name: [T.type]")
@@ -173,6 +176,9 @@ var/list/trait_categories = list() // The categories available for the trait men
 
 	return result
 
+/datum/trait/proc/is_available()
+	return TRUE
+
 // Similar to above, but uses the above two procs, in one place.
 // Returns TRUE is everything is well.
 /datum/trait/proc/validate(var/list/current_traits, var/datum/category_item/player_setup_item/traits/setup)
@@ -193,4 +199,4 @@ var/list/trait_categories = list() // The categories available for the trait men
 	for(var/trait in mind.traits)
 		var/datum/trait/T = trait_datums[trait]
 		if(istype(T))
-			T.apply_trait_post_spawn(src)
+			T.apply_trait_post_spawn(src)