Allow crafting card deck from 2 pieces of paper

init.lua

@@ -362,29 +362,46 @@ minetest.register_craft({
 })
 minetest.register_craft({
       output = "deck:chestpile",
-      recipe = {{ "default:paper" }}
+      recipe = {{ "default:paper" },{ "default:paper" }}
 })
 
 local function craft_pile(itemstack,player,old_craft_grid,craft_inv,really)
       --describe("craft",old_craft_grid)
       -- local s=craft_inv:get_size("craft")
       local place, cardname
+      local onlycards=true
+      local onlypaper=true
       for key,value in pairs(old_craft_grid) do
 	 --local stack=craft_inv:get_stack("craft",i)
 	 local stack=old_craft_grid[key]
 	 if stack:is_empty() then
-	    minetest.log("empty "..key)
+	    --minetest.log("empty "..key)
 	 else
 	    place=key
 	    cardname=stack:get_name()
 	    if string.sub(cardname,1,10) ~= "deck:card_" then
-	       return nil
+	       onlycards=false
+	    end
+	    if cardname ~= "default:paper" then
+	       onlypaper=false
 	    end
 	    minetest.log("craft:"..key.."="..stack:get_name())
 	 end
       end
-      if cardname == nil then
-	 return ItemStack()
+      if (onlycards==false and onlypaper==false) then
+	 return nil
+      end
+      if onlypaper then
+	 local resultname=itemstack:get_name()
+	 if resultname == "deck:chestpile" then
+	    local stackmeta=itemstack:get_meta()
+	    local i
+	    for i=1,52,1 do
+	       stackmeta:set_string(i,cardnames[i])
+	    end
+	    return itemstack
+	 end
+	 return nil
       end
       local pilename
       if place < 5 then