[MIRROR] Fix stacking of blast doors and shutters from crafting (#3822)

* Fix stacking of blast doors and shutters from crafting (#57360)

* Fix stacking of blast doors and shutters from crafting

Co-authored-by: Ghilker <42839747+Ghilker@users.noreply.github.com>

code/datums/components/crafting/crafting.dm

@@ -195,6 +195,10 @@
 	var/send_feedback = 1
 	if(check_contents(a, R, contents))
 		if(check_tools(a, R, contents))
+			if(R.one_per_turf)
+				for(var/content as anything in get_turf(a))
+					if(istype(content, R.result))
+						return ", object already present."
 			//If we're a mob we'll try a do_after; non mobs will instead instantly construct the item
 			if(ismob(a) && !do_after(a, R.time, target = a))
 				return "."

code/datums/components/crafting/recipes.dm

@@ -22,6 +22,8 @@
 	var/additional_req_text
 	///Required machines for the craft, set the assigned value of the typepath to CRAFTING_MACHINERY_CONSUME or CRAFTING_MACHINERY_USE. Lazy associative list: type_path key -> flag value.
 	var/list/machinery
+	///Should only one object exist on the same turf?
+	var/one_per_turf = FALSE
 
 /datum/crafting_recipe/New()
 	if(!(result in reqs))
@@ -1165,6 +1167,7 @@
 	tool_behaviors = list(TOOL_SCREWDRIVER, TOOL_MULTITOOL, TOOL_WIRECUTTER, TOOL_WELDER)
 	time = 15 SECONDS
 	category = CAT_MISC
+	one_per_turf = TRUE
 
 /datum/crafting_recipe/blast_doors
 	name = "Blast Door"
@@ -1176,6 +1179,7 @@
 	tool_behaviors = list(TOOL_SCREWDRIVER, TOOL_MULTITOOL, TOOL_WIRECUTTER, TOOL_WELDER)
 	time = 30 SECONDS
 	category = CAT_MISC
+	one_per_turf = TRUE
 
 /datum/crafting_recipe/aquarium
 	name = "Aquarium"