mirror of
https://github.com/joe7575/techpack.git
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186 lines
4.4 KiB
Lua
186 lines
4.4 KiB
Lua
--[[
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sl_controller
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=============
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Copyright (C) 2018 Joachim Stolberg
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LGPLv2.1+
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See LICENSE.txt for more information
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server.lua:
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]]--
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local SERVER_CAPA = 5000
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local DEFAULT_MEM = {
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size=0,
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data={
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version = 1,
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info = "SaferLua key/value Server",
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}
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}
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local function on_time(pos, elasped)
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local meta = minetest.get_meta(pos)
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local number = meta:get_string("number")
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local mem = tubelib.get_data(number, "memory") or DEFAULT_MEM
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meta:set_string("infotext", "Server "..number..": ("..(mem.size or 0).."/"..SERVER_CAPA..")")
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return true
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end
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minetest.register_node("sl_controller:server", {
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description = "Central Server",
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tiles = {
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-- up, down, right, left, back, front
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"sl_controller_server_top.png",
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"sl_controller_server_top.png",
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"sl_controller_server_side.png",
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"sl_controller_server_side.png^[transformFX",
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"sl_controller_server_back.png",
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{
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image = "sl_controller_server_front.png",
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backface_culling = false,
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animation = {
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type = "vertical_frames",
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aspect_w = 32,
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aspect_h = 32,
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length = 1,
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},
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},
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},
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drawtype = "nodebox",
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node_box = {
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type = "fixed",
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fixed = {
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{ -3/16, -8/16, -7/16, 3/16, 6/16, 7/16},
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},
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},
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after_place_node = function(pos, placer)
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local meta = minetest.get_meta(pos)
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local number = tubelib.add_node(pos, "sl_controller:server")
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meta:set_string("owner", placer:get_player_name())
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meta:set_string("number", number)
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tubelib.set_data(number, "memory", DEFAULT_MEM)
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on_time(pos, 0)
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minetest.get_node_timer(pos):start(20)
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end,
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on_dig = function(pos, node, puncher, pointed_thing)
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if minetest.is_protected(pos, puncher:get_player_name()) then
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return
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end
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local meta = minetest.get_meta(pos)
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local number = meta:get_string("number")
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tubelib.set_data(number, "memory", nil)
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minetest.node_dig(pos, node, puncher, pointed_thing)
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tubelib.remove_node(pos)
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end,
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on_timer = on_time,
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paramtype = "light",
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sunlight_propagates = true,
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paramtype2 = "facedir",
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groups = {choppy=1, cracky=1, crumbly=1},
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is_ground_content = false,
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sounds = default.node_sound_stone_defaults(),
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})
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minetest.register_craft({
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output = "sl_controller:server",
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recipe = {
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{"", "dye:black", ""},
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{"default:mese_crystal", "tubelib:wlanchip", "default:mese_crystal"},
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{"default:steel_ingot", "default:copper_ingot", "default:steel_ingot"},
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},
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})
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local function calc_size(v)
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if type(v) == "number" then
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return 1
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elseif v == nil then
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return 0
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elseif type(v) == "string" then
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return #v
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elseif v.MemSize then
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return v.MemSize
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else
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return nil
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end
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end
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local function write_value(mem, key, item)
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if mem and mem.size < SERVER_CAPA then
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if mem.data[key] then
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mem.size = mem.size - calc_size(mem.data[key])
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end
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if type(item) == "table" then
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item = safer_lua.datastruct_to_table(item)
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end
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mem.size = mem.size + calc_size(item)
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mem.data[key] = item
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end
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end
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local function read_value(mem, key)
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local item = mem.data[key]
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if type(item) == "table" then
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item = safer_lua.table_to_datastruct(item)
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end
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return item
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end
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tubelib.register_node("sl_controller:server", {}, {
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on_recv_message = function(pos, topic, payload)
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local meta = minetest.get_meta(pos)
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if meta then
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local number = meta:get_string("number")
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local mem = tubelib.get_data(number, "memory") or DEFAULT_MEM
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if topic == "read" then
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return read_value(mem, payload)
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elseif topic == "write" then
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write_value(mem, payload.key, payload.value)
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tubelib.set_data(number, "memory", mem)
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else
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return "unsupported"
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end
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end
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end,
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})
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sl_controller.register_function("server_read", {
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cmnd = function(self, num, key)
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if type(key) == "string" then
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return tubelib.send_request(num, "read", key)
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else
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self.error("Invalid server_read parameter")
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end
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end,
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help = " $server_read(num, key)\n"..
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" Read a value from the server.\n"..
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" 'key' must be a string.\n"..
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' example: state = $server_read("0123", "state")'
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})
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sl_controller.register_action("server_write", {
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cmnd = function(self, num, key, value)
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if type(key) == "string" then
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tubelib.send_message(num, self.meta.owner, nil, "write", {key=key, value=value})
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else
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self.error("Invalid server_write parameter")
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end
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end,
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help = " $server_write(num, key, value)\n"..
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" Store a value on the server under the key 'key'.\n"..
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" 'key' must be a string. 'value' can be either a\n"..
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" number, string, boolean, nil or data structure.\n"..
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' example: $server_write("0123", "state", state)'
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})
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