sapling on place function (#40)

src/functions.lua

@@ -16,4 +16,40 @@ function functions.can_interact_with_node(player, pos)
 	return false
 end
 
+function functions.sapling_on_place(
+	itemstack, player, pointed_thing, sapling_name, minp_relative, maxp_relative, interval
+)
+	if default then
+		return default.sapling_on_place(
+			itemstack, player, pointed_thing, sapling_name, minp_relative, maxp_relative, interval
+		)
+	end
+
+	local pos = pointed_thing.above
+	local pname = player and player:get_player_name() or ""
+	local below_node = minetest.get_node_or_nil(pointed_thing.under)
+
+	if below_node and minetest.registered_items[below_node.name] and
+		minetest.registered_items[below_node.name].buildable_to then
+
+		pos = pointed_thing.under
+	end
+
+	--check protection
+	if minetest.is_protected(pos, pname) then
+		minetest.record_protection_violation(pos, pname)
+		return itemstack
+	end
+
+	--actually place sapling
+	minetest.set_node(pos, {name = sapling_name})
+
+	--handle survival
+	if not minetest.is_creative_enabled(pname) then
+		itemstack:take_item()
+	end
+
+	return itemstack
+end
+
 return functions