Add first try of code for smithing table (Thanks to Fleckenstein), add _mcl_upgradable and _mcl_upgrade_item to every diamond tool/armor piece

mods/ITEMS/mcl_armor/init.lua

@@ -81,6 +81,8 @@ minetest.register_tool("mcl_armor:helmet_diamond",{
 	},
 	on_place = armor.on_armor_use,
 	on_secondary_use = armor.on_armor_use,
+	_mcl_upgradeable = true,
+	_mcl_upgrade_item = "mcl_armor:helmet_netherite"
 })
 
 minetest.register_tool("mcl_armor:helmet_netherite",{
@@ -173,6 +175,8 @@ minetest.register_tool("mcl_armor:chestplate_diamond",{
 	},
 	on_place = armor.on_armor_use,
 	on_secondary_use = armor.on_armor_use,
+	_mcl_upgradable = true,
+	_mcl_upgradeitem = "mcl_armor:chestplate_netherite"
 })
 
 minetest.register_tool("mcl_armor:chestplate_netherite",{
@@ -265,6 +269,8 @@ minetest.register_tool("mcl_armor:leggings_diamond",{
 	},
 	on_place = armor.on_armor_use,
 	on_secondary_use = armor.on_armor_use,
+	_mcl_upgradable = true,
+	_mcl_upgrade_item = "mcl_armor:leggings_netherite"
 })
 
 minetest.register_tool("mcl_armor:leggings_netherite",{
@@ -356,6 +362,8 @@ minetest.register_tool("mcl_armor:boots_diamond",{
 	},
 	on_place = armor.on_armor_use,
 	on_secondary_use = armor.on_armor_use,
+	_mcl_upgradable = true,
+	_mcl_upgrade_item = "mcl_armor:boots_diamond"
 })
 
 minetest.register_tool("mcl_armor:boots_chain", {

mods/ITEMS/mcl_farming/hoes.lua

@@ -256,6 +256,8 @@ minetest.register_tool("mcl_farming:hoe_diamond", {
 	_mcl_diggroups = {
 		hoey = { speed = 8, level = 5, uses = 1562 }
 	},
+	_mcl_upgradable = true,
+	_mcl_upgrade_item = "mcl_tools:hoe_netherite"
 })
 
 minetest.register_craft({

mods/ITEMS/mcl_smithing_table/init.lua

@@ -1,41 +1,150 @@
+--[[
+By EliasFleckenstein03 and Code-Sploit
+]]
+
+--[[
+Netherite item / node strings
+
+Nodes:
+
+Ancient Debris							mcl_nether:ancient_debris
+Netherite Ingot 						mcl_nether:netherite_ingot
+Netherite Scrap							mcl_nether:netherite_scrap
+Netherite Block							mcl_nether:netheriteblock
+
+Items:
+
+Netherite Sword							mcl_tools:sword_netherite
+Netherite Pickaxe						mcl_tools:pick_netherite
+Netherite Axe 							mcl_tools:axe_netherite
+Netherite Shovel						mcl_tools:shovel_netherite
+Netherite Hoe   						mcl_farming:hoe_netherite
+
+Netherite Helmet						mcl_armor:helmet_netherite
+Netherite Chestplate  			mcl_armor:chestplate_netherite
+Netherite Leggings  				mcl_armor:leggings_netherite
+Netherite Boots 						mcl_armor:boots_netherite
+]]
+
+local S = minetest.get_translator("mcl_smithing_table")
+mcl_smithing_table = {}
+
+-- Function to upgrade diamond tool/armor to netherite tool/armor
+function mcl_smithing_table.upgrade_item(itemstack)
+	itemstack = ItemStack(itemstack)	-- Copy the stack
+
+	local def = itemstack:get_definition()
+
+	if not def or not def._mcl_upgradeable then
+		return
+	end
+
+	local itemname = itemstack:get_name()
+
+	local upgrade_item = def._mcl_upgrade_item or itemname:gsub("diamond", "netherite")
+
+	if upgrade_item == itemname then
+		return
+	end
+
+	itemstack:set_name(upgrade_item)
+
+	-- Reload the ToolTips of the tool
+
+	tt.reload_itemstack_description(itemstack)
+
+	-- Only return itemstack if upgrade was successfull
+	return itemstack
+end
+
+-- Badly copied over from mcl_anvils
+
 local formspec = "size[9,9]" ..
-		   "label[0,4.0;" .. minetest.formspec_escape(minetest.colorize(mcl_colors.DARK_GRAY, "Inventory")) .. "]" ..
+		   "label[0,4.0;" .. minetest.formspec_escape(minetest.colorize(mcl_colors.DARK_GRAY, S("Inventory"))) .. "]" ..
 		   "list[current_player;main;0,4.5;9,3;9]" ..
 		   mcl_formspec.get_itemslot_bg(0,4.5,9,3) ..
 		   "list[current_player;main;0,7.74;9,1;]" ..
 		   mcl_formspec.get_itemslot_bg(0,7.74,9,1) ..
-		   "list[context;input;1,2.5;1,1;]" ..
+		   "list[context;diamond_item;1,2.5;1,1;]" ..
 		   mcl_formspec.get_itemslot_bg(1,2.5,1,1) ..
-		   "list[context;input;4,2.5;1,1;1]" ..
+		   "list[context;netherite;4,2.5;1,1;]" ..
 		   mcl_formspec.get_itemslot_bg(4,2.5,1,1) ..
-		   "list[context;output;8,2.5;1,1;]" ..
+		   "list[context;upgraded_item;8,2.5;1,1;]" ..
 		   mcl_formspec.get_itemslot_bg(8,2.5,1,1) ..
-		   "label[3,0.1;" .. minetest.formspec_escape(minetest.colorize(mcl_colors.DARK_GRAY, "Upgrade Gear")) .. "]" ..
+		   "label[3,0.1;" .. minetest.formspec_escape(minetest.colorize(mcl_colors.DARK_GRAY, S("Upgrade Gear"))) .. "]" ..
-		   "button[7,0.7;2,1;name_button;" .. minetest.formspec_escape("Upgrade Gear") .. "]" ..
 		   "listring[context;output]"..
 		   "listring[current_player;main]"..
 		   "listring[context;input]"..
 		   "listring[current_player;main]"
 
+local function reset_upgraded_item(pos)
+	local inv = minetest.get_meta(pos):get_inventory()
+	local upgraded_item
 
-local function upgrade(itemstack)
+	if inv:get_stack("netherite", 1):get_name() == "mcl_nether:netherite_ingot" then
-	itemstack:set_name(itemstack:get_name():gsub("diamond", "netherite"))
+		upgraded_item = mcl_smithing_table.upgrade_item(inv:get_stack("diamond_item", 1))
+	end
+
+	inv:set_stack("upgraded_item", 1, upgraded_item)
 end
 
 minetest.register_node("mcl_smithing_table:table", {
-	description = "Smithing table",
+	description = S("Smithing table"),
+	-- ToDo: Add _doc_items_longdesc and _doc_items_usagehelp
 
 	stack_max = 64,
-	groups = {pickaxey = 2, deco_block = true},
+	groups = {pickaxey = 2, deco_block = 1},
 
 	tiles = {
 		"mcl_smithing_table_top.png", "mcl_smithing_table_front.png", "mcl_smithing_table_side.png",
-		"mcl_smithing_table_side.png", "mcl_smithing_table_side.png", "mcl_smithing_table_side.png",
+		"mcl_smithing_table_side.png", "mcl_smithing_table_side.png", "mcl_smithing_table_side.png"
-		"mcl_smithing_table_side.png", "mcl_smithing_table_side.png", "mcl_smithing_table_bottom.png"
 	},
 
+	sounds = mcl_sounds.node_sound_metal_defaults(),
+
 	on_construct = function(pos)
-        minetest.get_meta(pos):set_string("formspec", formspec)
+			local meta = minetest.get_meta(pos)
+			meta:set_string("formspec", formspec)
+
+			local inv = meta:get_inventory()
+
+    	inv:set_size("diamond_item", 1)
+			inv:set_size("netherite", 1)
+			inv:set_size("upgraded_item", 1)
+  end,
+
+	allow_metadata_inventory_put = function(pos, listname, index, stack, player)
+		if listname == "diamond_item" and mcl_smithing_table.upgrade_item(stack) or listname == "netherite" and stack:get_name() == "mcl_nether:netherite_ingot" then
+			return stack:get_count()
+		end
+
+		return 0
+	end,
+
+	allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
+		return 0
+	end,
+
+	on_metadata_inventory_put = reset_upgraded_item,
+
+	on_metadata_inventory_take = function(pos, listname, index, stack, player)
+		local inv = minetest.get_meta(pos):get_inventory()
+
+		local function take_item(listname)
+			local itemstack = inv:get_stack(listname, 1)
+			itemstack:take_item()
+			inv:set_stack(listname, 1, itemstack)
+		end
+
+		if listname == "upgraded_item" then
+			take_item("diamond_item")
+			take_item("netherite")
+
+			-- ToDo: make epic sound
+			minetest.sound_play("mcl_smithing_table_upgrade", {pos = pos, max_hear_distance = 16})
+		end
+
+		reset_upgraded_item(pos)
 	end,
 
 	_mcl_blast_resistance = 2.5,

mods/ITEMS/mcl_tools/init.lua

@@ -173,6 +173,8 @@ minetest.register_tool("mcl_tools:pick_diamond", {
 	_mcl_diggroups = {
 		pickaxey = { speed = 8, level = 5, uses = 1562 }
 	},
+	_mcl_upgradable = true,
+	_mcl_upgrade_item = "mcl_tools:pick_netherite"
 })
 
 minetest.register_tool("mcl_tools:pick_netherite", {
@@ -370,6 +372,8 @@ minetest.register_tool("mcl_tools:shovel_diamond", {
 	_mcl_diggroups = {
 		shovely = { speed = 8, level = 5, uses = 1562 }
 	},
+	_mcl_upgradable = true,
+	_mcl_upgrade_item = "mcl_tools:shovel_netherite"
 })
 
 minetest.register_tool("mcl_tools:shovel_netherite", {
@@ -546,6 +550,8 @@ minetest.register_tool("mcl_tools:axe_diamond", {
 	_mcl_diggroups = {
 		axey = { speed = 8, level = 5, uses = 1562 }
 	},
+	_mcl_upgradable = true,
+	_mcl_upgrade_item = "mcl_tools:axe_netherite"
 })
 
 minetest.register_tool("mcl_tools:axe_netherite", {
@@ -670,6 +676,8 @@ minetest.register_tool("mcl_tools:sword_diamond", {
 		swordy = { speed = 8, level = 5, uses = 1562 },
 		swordy_cobweb = { speed = 8, level = 5, uses = 1562 }
 	},
+	_mcl_upgradable = true,
+	_mcl_upgrade_item = "mcl_tools:sword_netherite"
 })
 minetest.register_tool("mcl_tools:sword_netherite", {
 	description = S("Netherite Sword"),