-- Building tools
minetest.register_chatcommand("replacenear", {
  privs = {
    creative = true
  },
  func = function (name, param)
    local parts = param:split(" ")
    if #parts == 3 then
      local player = minetest.get_player_by_name(name)
      local pos = player:get_pos()
      local range = tonumber(parts[1]) or 5
      local from = parts[2]:split(",")
      local to = parts[3]
      local replaced = 0

      local function replace(p)
        for _, v in pairs(from) do
          local name = minetest.get_node(p).name
          local anyblock_match = (v == "anyblock" and name ~= "air" and name ~= "ignore")

          if name == v or v == "any" or anyblock_match then
            minetest.set_node(p, {name = to})
            replaced = replaced + 1
          end
        end
      end

      for dx = -range, range do
        for dz = -range, range do
          for dy = -range, range do
            local npos = {x = pos.x + dx, y = pos.y + dy, z = pos.z + dz}
            replace(npos)
          end
        end
      end
      return true, string.format("Replaced %d blocks", replaced)
    end
    return false, "Requires 3 arguments"
  end
})