write something there

mods/unified_inventory/legacy.lua

@@ -0,0 +1,55 @@
+-- Inefficient pattern matching
+
+local warned_funcs = {}
+local function LOG_ONCE(funcname)
+	if warned_funcs[funcname] then return end
+	warned_funcs[funcname] = true
+	minetest.log("error", "Call to undocumented, deprecated API '" .. funcname .. "'."
+		.. " In a future version of Unified Inventory this will result in a real error.")
+end
+
+function unified_inventory.canonical_item_spec_matcher(spec)
+	LOG_ONCE("canonical_item_spec_matcher")
+	local specname = ItemStack(spec):get_name()
+	if specname:sub(1, 6) ~= "group:" then
+		return function (itemname)
+			return itemname == specname
+		end
+	end
+
+	local group_names = specname:sub(7):split(",")
+	return function (itemname)
+		local itemdef = minetest.registered_items[itemname]
+		for _, group_name in ipairs(group_names) do
+			if (itemdef.groups[group_name] or 0) == 0 then
+				return false
+			end
+		end
+		return true
+	end
+end
+
+function unified_inventory.item_matches_spec(item, spec)
+	LOG_ONCE("item_matches_spec")
+	local itemname = ItemStack(item):get_name()
+	return unified_inventory.canonical_item_spec_matcher(spec)(itemname)
+end
+
+
+unified_inventory.registered_group_items = {
+	mesecon_conductor_craftable = "mesecons:wire_00000000_off",
+	stone = "default:cobble",
+	wood = "default:wood",
+	book = "default:book",
+	sand = "default:sand",
+	leaves = "default:leaves",
+	tree = "default:tree",
+	vessel = "vessels:glass_bottle",
+	wool = "wool:white",
+}
+
+function unified_inventory.register_group_item(groupname, itemname)
+	LOG_ONCE("register_group_item")
+	unified_inventory.registered_group_items[groupname] = itemname
+end
+