693 lines
20 KiB
Lua
693 lines
20 KiB
Lua
--[[
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Tube Library
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============
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Copyright (C) 2017-2019 Joachim Stolberg
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LGPLv2.1+
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See LICENSE.txt for more information
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command.lua:
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See [api.md] for the interface documentation
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]]--
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--- for lazy programmers
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local S = function(pos) if pos then return minetest.pos_to_string(pos) end end
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local P = minetest.string_to_pos
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local M = minetest.get_meta
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local function deserialize(s)
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local tbl = {}
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for line in s:gmatch("[^;]+") do
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local num, spos = unpack(string.split(line, "="))
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tbl[num] = {pos = minetest.string_to_pos(spos)}
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end
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return tbl
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end
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local function serialize(data)
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local tbl = {}
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for k,v in pairs(data) do
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tbl[#tbl+1] = k.."="..minetest.pos_to_string(v.pos)
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end
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return table.concat(tbl, ";")
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end
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-- to convert the data base from v2 to v3
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local function extract_data(data)
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local tbl = {}
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for num,item in pairs(data) do
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local new_item = {}
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local data_present = false
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for k,v in pairs(item) do
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if k ~= "name" and k ~= "pos" then
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new_item[k] = v
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data_present = true
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end
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end
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if data_present then
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tbl[num] = new_item
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end
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end
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return tbl
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end
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------------------------------------------------------------------
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-- Data base storage
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-------------------------------------------------------------------
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local storage = minetest.get_mod_storage()
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local NextNumber = minetest.deserialize(storage:get_string("NextNumber")) or 1
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local Version = minetest.deserialize(storage:get_string("Version")) or 1
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local Number2Pos
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local Number2Data
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local TemporaryRemovedNodes
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if Version == 2 then -- legacy data base
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Number2Pos = minetest.deserialize(storage:get_string("Number2Pos")) or {}
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Number2Data = extract_data(Number2Pos)
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TemporaryRemovedNodes = {}
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Version = 3
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else
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Number2Pos = deserialize(storage:get_string("Number2Pos"))
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Number2Data = minetest.deserialize(storage:get_string("Number2Data")) or {}
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TemporaryRemovedNodes = minetest.deserialize(storage:get_string("TemporaryRemovedNodes")) or {}
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end
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local function update_mod_storage()
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local t = minetest.get_us_time()
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minetest.log("action", "[Tubelib] Store data...")
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storage:set_string("NextNumber", minetest.serialize(NextNumber))
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storage:set_string("Version", minetest.serialize(Version))
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storage:set_string("Number2Pos", serialize(Number2Pos))
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storage:set_string("Number2Data", minetest.serialize(Number2Data))
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storage:set_string("TemporaryRemovedNodes", minetest.serialize(TemporaryRemovedNodes))
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-- store data each hour
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minetest.after(60*59, update_mod_storage)
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t = minetest.get_us_time() - t
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minetest.log("action", "[Tubelib] Data stored. t="..t.."us")
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end
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minetest.register_on_shutdown(function()
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update_mod_storage()
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end)
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-- store data after one hour
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minetest.after(60*59, update_mod_storage)
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-- Key2Number will be generated at runtine
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local Key2Number = {}
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local Name2Name = {} -- translation table
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-------------------------------------------------------------------
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-- Local helper functions
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-------------------------------------------------------------------
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-- Localize functions to avoid table lookups (better performance).
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local string_find = string.find
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local string_split = string.split
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local tubelib_NodeDef = tubelib.NodeDef
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local Tube = tubelib.Tube
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-- Generate a key string based on the given pos table,
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-- Used internaly as table key,
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local function get_key_str(pos)
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pos = minetest.pos_to_string(pos)
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return string.sub(pos, 2, -2)
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end
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-- Determine position related node number for addressing purposes
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local function get_number(pos)
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local key = get_key_str(pos)
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if not Key2Number[key] then
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Key2Number[key] = NextNumber
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NextNumber = NextNumber + 1
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end
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return string.format("%.04u", Key2Number[key])
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end
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local function get_node_lvm(pos)
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local node = minetest.get_node_or_nil(pos)
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if node then
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return node
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end
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local vm = minetest.get_voxel_manip()
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local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
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local data = vm:get_data()
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local param2_data = vm:get_param2_data()
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local area = VoxelArea:new({MinEdge = MinEdge, MaxEdge = MaxEdge})
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local idx = area:index(pos.x, pos.y, pos.z)
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node = {
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name = minetest.get_name_from_content_id(data[idx]),
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param2 = param2_data[idx]
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}
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return node
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end
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local function generate_Key2Number()
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local key
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for num,item in pairs(Number2Pos) do
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key = get_key_str(item.pos)
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Key2Number[key] = num
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end
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end
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local function not_protected(pos, placer_name, clicker_name)
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local meta = minetest.get_meta(pos)
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if meta then
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local cached_name = meta:get_string("tubelib_cached_name")
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if placer_name and (placer_name == cached_name or not minetest.is_protected(pos, placer_name)) then
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meta:set_string("tubelib_cached_name", placer_name)
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if clicker_name == nil or not minetest.is_protected(pos, clicker_name) then
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return true
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end
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end
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end
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return false
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end
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local function register_lbm(name, nodenames)
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minetest.register_lbm({
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label = "[Tubelib] Node update",
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name = name.."update",
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nodenames = nodenames,
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run_at_every_load = true,
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action = function(pos, node)
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local name = Name2Name[node.name]
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if tubelib_NodeDef[name] and tubelib_NodeDef[name].on_node_load then
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tubelib_NodeDef[name].on_node_load(pos)
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end
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end
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})
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end
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local DirToSide = {"B", "R", "F", "L", "D", "U"}
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local function dir_to_side(dir, param2)
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if dir < 5 then
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dir = (((dir - 1) - (param2 % 4)) % 4) + 1
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end
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return DirToSide[dir]
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end
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local SideToDir = {B=1, R=2, F=3, L=4, D=5, U=6}
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local function side_to_dir(side, param2)
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local dir = SideToDir[side]
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if dir < 5 then
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dir = (((dir - 1) + (param2 % 4)) % 4) + 1
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end
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return dir
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end
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local function get_dest_node(pos, side)
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local _,node = Tube:get_node(pos)
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local dir = side_to_dir(side, node.param2)
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local spos, sdir = Tube:get_connected_node_pos(pos, dir)
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if not (spos and sdir) then return end
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_,node = Tube:get_node(spos)
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local out_side = dir_to_side(tubelib2.Turn180Deg[sdir], node.param2)
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return spos, out_side, Name2Name[node.name] or node.name
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end
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local function item_handling_node(name)
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local node_def = name and tubelib_NodeDef[name]
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if node_def then
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return node_def.on_pull_item or node_def.on_push_item or node_def.is_pusher
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end
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end
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-------------------------------------------------------------------
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-- API helper functions
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-------------------------------------------------------------------
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-- Check the given list of numbers.
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-- Returns true if number(s) is/are valid and point to real nodes.
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function tubelib.check_numbers(numbers)
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if numbers then
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for _,num in ipairs(string_split(numbers, " ")) do
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if Number2Pos[num] == nil then
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return false
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end
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end
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return true
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end
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return false
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end
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-- Function returns { pos, name } for the node on the given position number.
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function tubelib.get_node_info(dest_num)
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if Number2Pos[dest_num] then
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return Number2Pos[dest_num]
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end
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return nil
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end
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-- Function returns the node number from the given position or
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-- nil, if no node number for this position is assigned.
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function tubelib.get_node_number(pos)
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local key = get_key_str(pos)
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local num = Key2Number[key]
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if num then
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num = string.format("%.04u", num)
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if Number2Pos[num] and Number2Pos[num].name then
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return num
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end
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end
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return nil
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end
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-- Function is used for available nodes with lost numbers, only.
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function tubelib.get_new_number(pos, name)
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-- store position
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local number = get_number(pos)
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Number2Pos[number] = {
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pos = pos,
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name = name,
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}
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return number
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end
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-- Store any node number related, additional data
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-- param number: node number, returned by tubelib.add_node
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-- param name: name of the data (string)
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-- param data: any data (number, string, table)
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function tubelib.set_data(number, name, data)
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Number2Data[number] = Number2Data[number] or {}
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if type(name) == "string" then
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Number2Data[number]["u_"..name] = data
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end
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end
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-- Read node number related data
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-- param number: node number, returned by tubelib.add_node
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-- param name: name of the data (string)
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function tubelib.get_data(number, name)
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if Number2Data[number] and type(name) == "string" then
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return Number2Data[number]["u_"..name]
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end
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return nil
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end
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-------------------------------------------------------------------
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-- Node construction/destruction functions
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-------------------------------------------------------------------
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-- Add node to the tubelib lists.
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-- Function determines and returns the node position number,
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-- needed for message communication.
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function tubelib.add_node(pos, name)
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if item_handling_node(name) then
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Tube:after_place_node(pos)
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end
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-- store position
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local number = get_number(pos)
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Number2Pos[number] = {
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pos = pos,
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name = name,
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}
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return number
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end
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-- Function removes the node from the tubelib lists.
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function tubelib.remove_node(pos)
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local number = get_number(pos)
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local name
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if Number2Pos[number] then
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name = Number2Pos[number].name
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Number2Pos[number] = {
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pos = pos,
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name = nil,
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time = minetest.get_day_count() -- used for reservation timeout
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}
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end
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if item_handling_node(name) then
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Tube:after_dig_node(pos)
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end
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end
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-------------------------------------------------------------------
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-- Node register function
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-------------------------------------------------------------------
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-- Register node for tubelib communication
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-- Call this function only at load time!
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-- Param name: The node name like "tubelib:pusher"
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-- Param add_names: Alternativ node names if needded, e.g.: "tubelib:pusher_active"
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-- Param node_definition: A table according to:
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-- {
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-- on_pull_item = func(pos, side, player_name),
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-- on_push_item = func(pos, side, item, player_name),
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-- on_unpull_item = func(pos, side, item, player_name),
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-- on_recv_message = func(pos, topic, payload),
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-- on_node_load = func(pos), -- LBM function
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-- on_node_repair = func(pos), -- repair defect (feature!) nodes
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-- }
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function tubelib.register_node(name, add_names, node_definition)
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tubelib_NodeDef[name] = node_definition
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-- store facedir table for all known node names
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Name2Name[name] = name
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for _,n in ipairs(add_names) do
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Name2Name[n] = name
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end
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if node_definition.on_pull_item or node_definition.on_push_item or
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node_definition.is_pusher then
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Tube:add_secondary_node_names({name})
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Tube:add_secondary_node_names(add_names)
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tubelib.KnownNodes[name] = true
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for _,n in ipairs(add_names) do
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tubelib.KnownNodes[n] = true
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end
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end
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-- register LBM
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if node_definition.on_node_load then
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local nodenames = {name}
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for _,n in ipairs(add_names) do
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nodenames[#nodenames + 1] = n
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end
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register_lbm(name, nodenames)
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end
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end
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-------------------------------------------------------------------
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-- Send message functions
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-------------------------------------------------------------------
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function tubelib.send_message(numbers, placer_name, clicker_name, topic, payload)
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for _,num in ipairs(string_split(numbers, " ")) do
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if Number2Pos[num] and Number2Pos[num].name then
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local data = Number2Pos[num]
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if not_protected(data.pos, placer_name, clicker_name) then
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if tubelib_NodeDef[data.name] and tubelib_NodeDef[data.name].on_recv_message then
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tubelib_NodeDef[data.name].on_recv_message(data.pos, topic, payload)
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end
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end
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end
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end
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end
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function tubelib.send_request(number, topic, payload)
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if Number2Pos[number] and Number2Pos[number].name then
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local data = Number2Pos[number]
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if tubelib_NodeDef[data.name] and tubelib_NodeDef[data.name].on_recv_message then
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return tubelib_NodeDef[data.name].on_recv_message(data.pos, topic, payload)
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end
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end
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return false
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end
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-- for defect nodes
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function tubelib.repair_node(pos)
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local node = minetest.get_node(pos)
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local name = Name2Name[node.name]
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if tubelib_NodeDef[name] and tubelib_NodeDef[name].on_node_repair then
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return tubelib_NodeDef[name].on_node_repair(pos)
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end
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return false
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end
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-------------------------------------------------------------------
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-- Client side Push/Pull item functions
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-------------------------------------------------------------------
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function tubelib.pull_items(pos, side, player_name)
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local npos, nside, name = get_dest_node(pos, side)
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if npos == nil then return end
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if tubelib_NodeDef[name] and tubelib_NodeDef[name].on_pull_item then
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return tubelib_NodeDef[name].on_pull_item(npos, nside, player_name)
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end
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return nil
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end
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function tubelib.push_items(pos, side, items, player_name)
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local npos, nside, name = get_dest_node(pos, side)
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if npos == nil then return end
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if tubelib_NodeDef[name] and tubelib_NodeDef[name].on_push_item then
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return tubelib_NodeDef[name].on_push_item(npos, nside, items, player_name)
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elseif name == "air" then
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minetest.add_item(npos, items)
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return true
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end
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return false
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end
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function tubelib.unpull_items(pos, side, items, player_name)
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local npos, nside, name = get_dest_node(pos, side)
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if npos == nil then return end
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if tubelib_NodeDef[name] and tubelib_NodeDef[name].on_unpull_item then
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return tubelib_NodeDef[name].on_unpull_item(npos, nside, items, player_name)
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end
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return false
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end
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function tubelib.pull_stack(pos, side, player_name)
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local npos, nside, name = get_dest_node(pos, side)
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if npos == nil then return end
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if tubelib_NodeDef[name] then
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if tubelib_NodeDef[name].on_pull_stack then
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return tubelib_NodeDef[name].on_pull_stack(npos, nside, player_name)
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elseif tubelib_NodeDef[name].on_pull_item then
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return tubelib_NodeDef[name].on_pull_item(npos, nside, player_name)
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end
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end
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return nil
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end
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-------------------------------------------------------------------
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-- Server side helper functions
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-------------------------------------------------------------------
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-- Get one item from the given ItemList. The position within the list
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-- is incremented each time so that different item stacks will be considered.
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-- Returns nil if ItemList is empty.
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function tubelib.get_item(meta, listname)
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if meta == nil or meta.get_inventory == nil then return nil end
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local inv = meta:get_inventory()
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if inv:is_empty(listname) then
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return nil
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end
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local size = inv:get_size(listname)
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local startpos = meta:get_int("tubelib_startpos") or 0
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for idx = startpos, startpos+size do
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idx = (idx % size) + 1
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local items = inv:get_stack(listname, idx)
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if items:get_count() > 0 then
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local taken = items:take_item(1)
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inv:set_stack(listname, idx, items)
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meta:set_int("tubelib_startpos", idx)
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return taken
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end
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end
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meta:set_int("tubelib_startpos", 0)
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return nil
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end
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-- Get one (or more) item(s) from the given ItemList, specified by stack number (1..n).
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-- Returns nil if ItemList is empty.
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function tubelib.get_this_item(meta, listname, list_number, num_items)
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if meta == nil or meta.get_inventory == nil then return nil end
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local inv = meta:get_inventory()
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if inv:is_empty(listname) then
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return nil
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end
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if num_items == nil then num_items = 1 end
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local items = inv:get_stack(listname, list_number)
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if items:get_count() > 0 then
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local taken = items:take_item(num_items)
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inv:set_stack(listname, list_number, items)
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return taken
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end
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return nil
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end
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-- Put the given item into the given ItemList.
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-- Function returns false if ItemList is full.
|
|
function tubelib.put_item(meta, listname, item)
|
|
if meta == nil or meta.get_inventory == nil then return false end
|
|
local inv = meta:get_inventory()
|
|
if inv:room_for_item(listname, item) then
|
|
inv:add_item(listname, item)
|
|
return true
|
|
end
|
|
return false
|
|
end
|
|
|
|
-- Take the number of items from the given ItemList.
|
|
-- Returns nil if the requested number is not available.
|
|
function tubelib.get_num_items(meta, listname, num)
|
|
if meta == nil or meta.get_inventory == nil then return nil end
|
|
local inv = meta:get_inventory()
|
|
if inv:is_empty(listname) then
|
|
return nil
|
|
end
|
|
local size = inv:get_size(listname)
|
|
for idx = 1, size do
|
|
local items = inv:get_stack(listname, idx)
|
|
if items:get_count() >= num then
|
|
local taken = items:take_item(num)
|
|
inv:set_stack(listname, idx, items)
|
|
return taken
|
|
end
|
|
end
|
|
return nil
|
|
end
|
|
|
|
function tubelib.get_stack(meta, listname)
|
|
local inv = meta:get_inventory()
|
|
local item = tubelib.get_item(meta, listname)
|
|
if item and item:get_stack_max() > 1 and inv:contains_item(listname, item) then
|
|
-- try to remove a complete stack
|
|
item:set_count(math.min(98, item:get_stack_max() - 1))
|
|
local taken = inv:remove_item(listname, item)
|
|
-- add the already removed
|
|
taken:set_count(taken:get_count() + 1)
|
|
return taken
|
|
end
|
|
return item
|
|
end
|
|
|
|
-- Return "full", "loaded", or "empty" depending
|
|
-- on the number of fuel stack items.
|
|
-- Function only works on fuel inventories with one stacks/99 items
|
|
function tubelib.fuelstate(meta, listname, item)
|
|
if meta == nil or meta.get_inventory == nil then return nil end
|
|
local inv = meta:get_inventory()
|
|
if inv:is_empty(listname) then
|
|
return "empty"
|
|
end
|
|
local list = inv:get_list(listname)
|
|
if #list == 1 and list[1]:get_count() == 99 then
|
|
return "full"
|
|
else
|
|
return "loaded"
|
|
end
|
|
end
|
|
|
|
-- Return "full", "loaded", or "empty" depending
|
|
-- on the inventory load.
|
|
-- Full is returned, when no empty stack is available.
|
|
function tubelib.get_inv_state(meta, listname)
|
|
if meta == nil or meta.get_inventory == nil then return nil end
|
|
local inv = meta:get_inventory()
|
|
local state
|
|
if inv:is_empty(listname) then
|
|
state = "empty"
|
|
else
|
|
local list = inv:get_list(listname)
|
|
state = "full"
|
|
local num = 0
|
|
for i, item in ipairs(list) do
|
|
if item:is_empty() then
|
|
return "loaded"
|
|
end
|
|
end
|
|
end
|
|
return state
|
|
end
|
|
|
|
-- Mainly used for door/gate nodes
|
|
-- To delete an entry, provide nil as number. The stored data will be returned.
|
|
function tubelib.temporary_remove_node(pos, number, name, add_data)
|
|
local key = get_key_str(pos)
|
|
if number then
|
|
add_data = add_data or {}
|
|
add_data.pos = pos
|
|
add_data.number = number
|
|
add_data.name = name
|
|
TemporaryRemovedNodes[key] = add_data
|
|
else
|
|
local data = table.copy(TemporaryRemovedNodes[key])
|
|
TemporaryRemovedNodes[key] = nil
|
|
return data
|
|
end
|
|
end
|
|
|
|
-------------------------------------------------------------------------------
|
|
-- Data Maintenance
|
|
-------------------------------------------------------------------------------
|
|
|
|
local function parse_number(s)
|
|
for _,word in ipairs(s:split(" ")) do
|
|
local n = tonumber(word)
|
|
if n and n > 0 then
|
|
return word
|
|
end
|
|
end
|
|
end
|
|
|
|
local function get_node_number(pos)
|
|
local meta = M(pos)
|
|
local num = meta:get_string("tubelib_number")
|
|
if num and num ~= "" then return num end
|
|
|
|
num = meta:get_string("number")
|
|
if num and num ~= "" then return num end
|
|
|
|
num = meta:get_string("own_number")
|
|
if num and num ~= "" then return num end
|
|
|
|
num = parse_number(meta:get_string("infotext"))
|
|
if num and num ~= "" then return num end
|
|
|
|
return 0
|
|
end
|
|
|
|
local function data_maintenance()
|
|
minetest.log("info", "[Tubelib] Data maintenance started")
|
|
|
|
-- Remove unused positions
|
|
local tbl = table.copy(Number2Pos)
|
|
Number2Pos = {}
|
|
local cnt1 = 0
|
|
local cnt2 = 0
|
|
for num,item in pairs(tbl) do
|
|
local name = Name2Name[get_node_lvm(item.pos).name]
|
|
cnt1 = cnt1 + 1
|
|
-- Is there a tubelib node?
|
|
if tubelib_NodeDef[name] then
|
|
-- Does the number match?
|
|
local nnum = get_node_number(item.pos)
|
|
if nnum == num then
|
|
cnt2 = cnt2 + 1
|
|
-- Store again
|
|
Number2Pos[num] = item
|
|
-- Add node names which are not stored as file
|
|
Number2Pos[num].name = name
|
|
--print("added", num, name)
|
|
else
|
|
--print("wrong number", num, name)
|
|
end
|
|
else
|
|
local key = get_key_str(item.pos)
|
|
local data = TemporaryRemovedNodes[key]
|
|
if data then
|
|
cnt2 = cnt2 + 1
|
|
-- Store again
|
|
Number2Pos[data.number] = data
|
|
--print("restored", data.number, data.name)
|
|
else
|
|
--print("no data", num)
|
|
end
|
|
end
|
|
end
|
|
minetest.log("info", "[Tubelib] Data base shrank from "..cnt1.." to "..cnt2.." nodes")
|
|
minetest.log("info", "[Tubelib] Data maintenance finished")
|
|
end
|
|
|
|
generate_Key2Number()
|
|
|
|
-- maintain data after 2 seconds
|
|
minetest.after(2, data_maintenance)
|
|
|
|
|