Refactored out "varient" in foavor of "variant".

Set up a basic "on_place" function.

Made _mcl_copper_waxed_variant and _mcl_copper_unwaxed_variant node parameters so that the waxing_copper_block and scraping_copper_block functions can be made generic.

Adjusted said functions to look first for the variants, and added in protection checks for the blocks

mods/ITEMS/mcl_copper/functions.lua

@@ -1,5 +1,34 @@
 --local deepslate_mod = minetest.get_modpath("mcl_deepslate")
 
+-- a basic on_place()
+function mcl_copper.on_place (itemstack, placer, pointed_thing)
+	if pointed_thing.type ~= "node" then
+		return itemstack
+	end
+	local node = minetest.get_node(pointed_thing.under)
+	local pos = pointed_thing.under
+	local node_name = node.name
+
+	if mcl_util.check_position_protection(pos, placer) then
+		return itemstack
+	end
+
+	-- Use pointed node's on_rightclick function first, if present
+	local new_stack = mcl_util.call_on_rightclick(itemstack, placer, pointed_thing)
+	if new_stack then
+		return new_stack
+	end
+
+	local placed = ItemStack(itemstack:get_name())
+	if not minetest.is_creative_enabled(placer:get_player_name()) then
+		itemstack:take_item()
+	end
+	minetest.item_place(placed, placer, pointed_thing, minetest.dir_to_facedir(vector.direction(pointed_thing.above, pointed_thing.under)))
+
+	return itemstack
+
+end
+
 local function register_oxidation_abm(abm_name, node_name, oxidized_variant)
 	minetest.register_abm({
 		label = abm_name,
@@ -14,20 +43,42 @@ end
 
 function waxing_copper_block(pos, node, player, itemstack, convert_to)
 	if itemstack:get_name() == "mcl_honey:honeycomb" then
-		node.name = convert_to
+		-- prevent modification of protected nodes.
+		if mcl_util.check_position_protection(pos, player) then
+			return
+		end
+
+		local def = minetest.registered_nodes(node.name)
+
+		if def and def._mcl_copper_waxed_variant then
+			node.name = def._mcl_copper_waxed_variant
+		end
+
 		minetest.set_node(pos, node)
 		awards.unlock(player:get_player_name(), "mcl:wax_on")
 		if not minetest.is_creative_enabled(player:get_player_name()) then
 			itemstack:take_item()
 		end
+		return itemstack
+
 	else
-		return true
+		return -- changed to work with mcl_util.call_on_rightclick()
 	end
 end
 
 function scraping_copper_block(pos, node, player, itemstack, convert_to)
 	if itemstack:get_name():find("axe") then
-		node.name = convert_to
+		-- prevent modification of protected nodes.
+		if mcl_util.check_position_protection(pos, player) then
+			return
+		end
+
+		local def = minetest.registered_nodes(node.name)
+
+		if def and def._mcl_copper_unwaxed_variant then
+			node.name = def._mcl_copper_unwaxed_variant
+		end
+
 		minetest.set_node(pos, node)
 		awards.unlock(player:get_player_name(), "mcl:wax_off")
 		if not minetest.is_creative_enabled(player:get_player_name()) then
@@ -36,7 +87,7 @@ function scraping_copper_block(pos, node, player, itemstack, convert_to)
 			itemstack:add_wear(wear)
 		end
 	else
-		return true
+		return
 	end
 end
 

mods/ITEMS/mcl_copper/nodes.lua

@@ -12,7 +12,6 @@ minetest.register_node("mcl_copper:stone_with_copper", {
 	_mcl_hardness = 3,
 	_mcl_silk_touch_drop = true,
 	_mcl_fortune_drop = mcl_core.fortune_drop_ore,
-
 })
 
 minetest.register_node("mcl_copper:block_raw", {
@@ -35,6 +34,7 @@ minetest.register_node("mcl_copper:block", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 3,
+	_mcl_copper_waxed_variant = "mcl_copper:waxed_block",
 	on_rightclick = function(pos, node, player, itemstack) waxing_copper_block(pos, node, player, itemstack, "mcl_copper:waxed_block") end,
 })
 
@@ -47,6 +47,7 @@ minetest.register_node("mcl_copper:waxed_block", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 3,
+	_mcl_copper_unwaxed_variant = "mcl_copper:block",
 	on_rightclick = function(pos, node, player, itemstack) scraping_copper_block(pos, node, player, itemstack, "mcl_copper:block") end,
 })
 
@@ -59,7 +60,8 @@ minetest.register_node("mcl_copper:block_exposed", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
-	_mcl_anti_oxidation_varient = "mcl_copper:block",
+	_mcl_anti_oxidation_variant = "mcl_copper:block",
+	_mcl_copper_waxed_variant = "mcl_copper:waxed_block_exposed",
 	on_rightclick = function(pos, node, player, itemstack) waxing_copper_block(pos, node, player, itemstack, "mcl_copper:waxed_block_exposed") end,
 })
 
@@ -72,6 +74,7 @@ minetest.register_node("mcl_copper:waxed_block_exposed", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
+	_mcl_copper_unwaxed_variant = "mcl_copper:block",
 	on_rightclick = function(pos, node, player, itemstack) scraping_copper_block(pos, node, player, itemstack, "mcl_copper:block") end,
 })
 
@@ -84,7 +87,8 @@ minetest.register_node("mcl_copper:block_weathered", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
-	_mcl_anti_oxidation_varient = "mcl_copper:block_exposed",
+	_mcl_anti_oxidation_variant = "mcl_copper:block_exposed",
+	_mcl_copper_waxed_variant = "mcl_copper:waxed_block_weathered",
 	on_rightclick = function(pos, node, player, itemstack) waxing_copper_block(pos, node, player, itemstack, "mcl_copper:waxed_block_weathered") end,
 })
 
@@ -97,6 +101,7 @@ minetest.register_node("mcl_copper:waxed_block_weathered", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
+	_mcl_copper_unwaxed_variant = "mcl_copper:block_exposed",
 	on_rightclick = function(pos, node, player, itemstack) scraping_copper_block(pos, node, player, itemstack, "mcl_copper:block_exposed") end,
 })
 
@@ -109,7 +114,8 @@ minetest.register_node("mcl_copper:block_oxidized", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
-	_mcl_anti_oxidation_varient = "mcl_copper:block_weathered",
+	_mcl_anti_oxidation_variant = "mcl_copper:block_weathered",
+	_mcl_copper_waxed_variant = "mcl_copper:waxed_block_oxidized",
 	on_rightclick = function(pos, node, player, itemstack) waxing_copper_block(pos, node, player, itemstack, "mcl_copper:waxed_block_oxidized") end,
 })
 
@@ -122,6 +128,7 @@ minetest.register_node("mcl_copper:waxed_block_oxidized", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
+	_mcl_copper_unwaxed_variant = "mcl_copper:block_weathered",
 	on_rightclick = function(pos, node, player, itemstack) scraping_copper_block(pos, node, player, itemstack, "mcl_copper:block_weathered") end,
 })
 
@@ -134,6 +141,7 @@ minetest.register_node("mcl_copper:block_cut", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
+	_mcl_copper_waxed_variant = "mcl_copper:waxed_block_cut",
 	on_rightclick = function(pos, node, player, itemstack) waxing_copper_block(pos, node, player, itemstack, "mcl_copper:waxed_block_cut") end,
 })
 
@@ -146,6 +154,7 @@ minetest.register_node("mcl_copper:waxed_block_cut", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
+	_mcl_copper_unwaxed_variant = "mcl_copper:block_cut",
 	on_rightclick = function(pos, node, player, itemstack) scraping_copper_block(pos, node, player, itemstack, "mcl_copper:block_cut") end,
 })
 
@@ -158,7 +167,8 @@ minetest.register_node("mcl_copper:block_exposed_cut", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
-	_mcl_anti_oxidation_varient = "mcl_copper:block_cut",
+	_mcl_anti_oxidation_variant = "mcl_copper:block_cut",
+	_mcl_copper_waxed_variant = "mcl_copper:waxed_block_exposed_cut",
 	on_rightclick = function(pos, node, player, itemstack) waxing_copper_block(pos, node, player, itemstack, "mcl_copper:waxed_block_exposed_cut") end,
 })
 
@@ -171,6 +181,7 @@ minetest.register_node("mcl_copper:waxed_block_exposed_cut", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
+	_mcl_copper_unwaxed_variant = "mcl_copper:block_cut",
 	on_rightclick = function(pos, node, player, itemstack) scraping_copper_block(pos, node, player, itemstack, "mcl_copper:block_cut") end,
 })
 
@@ -183,7 +194,8 @@ minetest.register_node("mcl_copper:block_weathered_cut", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
-	_mcl_anti_oxidation_varient = "mcl_copper:block_exposed_cut",
+	_mcl_anti_oxidation_variant = "mcl_copper:block_exposed_cut",
+	_mcl_copper_waxed_variant = "mcl_copper:waxed_block_weathered_cut",
 	on_rightclick = function(pos, node, player, itemstack) waxing_copper_block(pos, node, player, itemstack, "mcl_copper:waxed_block_weathered_cut") end,
 })
 
@@ -196,6 +208,7 @@ minetest.register_node("mcl_copper:waxed_block_weathered_cut", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
+	_mcl_copper_unwaxed_variant = "mcl_copper:block_exposed_cut",
 	on_rightclick = function(pos, node, player, itemstack) scraping_copper_block(pos, node, player, itemstack, "mcl_copper:block_exposed_cut") end,
 })
 
@@ -208,7 +221,8 @@ minetest.register_node("mcl_copper:block_oxidized_cut", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
-	_mcl_anti_oxidation_varient = "mcl_copper:block_weathered_cut",
+	_mcl_anti_oxidation_variant = "mcl_copper:block_weathered_cut",
+	_mcl_copper_waxed_variant = "mcl_copper:waxed_block_oxidized_cut",
 	on_rightclick = function(pos, node, player, itemstack) waxing_copper_block(pos, node, player, itemstack, "mcl_copper:waxed_block_oxidized_cut") end,
 })
 
@@ -221,6 +235,7 @@ minetest.register_node("mcl_copper:waxed_block_oxidized_cut", {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6,
 	_mcl_hardness = 5,
+	_mcl_copper_unwaxed_variant = "mcl_copper:block_weathered_cut",
 	on_rightclick = function(pos, node, player, itemstack) scraping_copper_block(pos, node, player, itemstack, "mcl_copper:block_weathered_cut") end,
 })