Merge pull request #9004 from Trilbyspaceclone/Crafting

Ports "Adds helpers for finding martial arts types #42045" as well as "Adds simple framework for learnable crafting recipes #43296"

code/modules/crafting/craft.dm

@@ -317,6 +317,8 @@
 	var/list/cant_craft = list()
 	for(var/rec in GLOB.crafting_recipes)
 		var/datum/crafting_recipe/R = rec
+		if(!R.always_availible && !(R.type in user?.mind?.learned_recipes)) //User doesn't actually know how to make this.
+			continue
 		if((R.category != cur_category) || (R.subcategory != cur_subcategory))
 			continue
 		if(check_contents(R, surroundings))
@@ -431,3 +433,10 @@
 	data["tool_text"] = tool_text
 
 	return data
+
+//Mind helpers
+
+/datum/mind/proc/teach_crafting_recipe(R)
+	if(!learned_recipes)
+		learned_recipes = list()
+	learned_recipes |= R

code/modules/crafting/recipes.dm

@@ -9,6 +9,7 @@
 	var/chem_catalysts[] = list() //like tools but for reagents
 	var/category = CAT_NONE //where it shows up in the crafting UI
 	var/subcategory = CAT_NONE
+	var/always_availible = TRUE //Set to FALSE if it needs to be learned first.
 
 /datum/crafting_recipe/pin_removal
 	name = "Pin Removal"