mirror of
https://github.com/joe7575/techpack.git
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422 lines
12 KiB
Lua
422 lines
12 KiB
Lua
--[[
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Tube Library
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============
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Copyright (C) 2017 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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-------------------------------------------------------------------
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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 = minetest.deserialize(storage:get_string("Number2Pos")) or {}
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local function update_mod_storage()
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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", minetest.serialize(Number2Pos))
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storage:set_string("Key2Number", nil) -- not used any more
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-- store data each hour
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minetest.after(60*60, update_mod_storage)
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print("[Tubelib] Data stored")
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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*60, 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 get_neighbor_pos = tubelib.get_neighbor_pos
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local read_node_with_vm = tubelib.read_node_with_vm
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-- Translate from facedir to contact side of the other node
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-- (left for one is right for the other node)
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local FacedirToSide = {[0] = "F", "L", "B", "R", "U", "D"}
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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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-- Determine the contact side of the node at the given pos
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-- param facedir: facedir to the node
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local function get_node_side(npos, facedir)
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local node = minetest.get_node_or_nil(npos) or read_node_with_vm(npos)
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if facedir < 4 then
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facedir = (facedir - node.param2 + 4) % 4
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end
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return FacedirToSide[facedir], 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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-------------------------------------------------------------------
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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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print("key", key, "num", num)
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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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-- 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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if Number2Pos[number] and type(name) == "string" then
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Number2Pos[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 Number2Pos[number] and type(name) == "string" then
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return Number2Pos[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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-- 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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if Number2Pos[number] then
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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 aging
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}
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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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-- }
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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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tubelib.KnownNodes[name] = true
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Name2Name[name] = name
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for _,n in ipairs(add_names) do
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tubelib.KnownNodes[n] = true
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Name2Name[n] = name
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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 placer_name and not minetest.is_protected(data.pos, placer_name) then
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if clicker_name == nil or not minetest.is_protected(data.pos, 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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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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-------------------------------------------------------------------
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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, facedir = get_neighbor_pos(pos, side)
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if npos == nil then return end
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local nside, node = get_node_side(npos, facedir)
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local name = Name2Name[node.name]
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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, facedir = get_neighbor_pos(pos, side)
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if npos == nil then return end
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local nside, node = get_node_side(npos, facedir)
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local name = Name2Name[node.name]
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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 node.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, facedir = get_neighbor_pos(pos, side)
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if npos == nil then return end
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local nside, node = get_node_side(npos, facedir)
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local name = Name2Name[node.name]
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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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-------------------------------------------------------------------
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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 item 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, number)
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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 items = inv:get_stack(listname, number)
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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, 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.
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function tubelib.put_item(meta, listname, item)
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if meta == nil or meta.get_inventory == nil then return false end
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local inv = meta:get_inventory()
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if inv:room_for_item(listname, item) then
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inv:add_item(listname, item)
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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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-- Take the number of items from the given ItemList.
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-- Returns nil if the requested number is not available.
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function tubelib.get_num_items(meta, listname, num)
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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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for idx = 1, size do
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local items = inv:get_stack(listname, idx)
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if items:get_count() >= num then
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local taken = items:take_item(num)
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inv:set_stack(listname, idx, items)
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return taken
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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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-- Return "full", "loaded", or "empty" depending
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-- on the number of fuel stack items.
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-- Function only works on fuel inventories with one stacks/99 items
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function tubelib.fuelstate(meta, listname, item)
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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 "empty"
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end
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local list = inv:get_list(listname)
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if #list == 1 and list[1]:get_count() == 99 then
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return "full"
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else
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return "loaded"
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end
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end
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-------------------------------------------------------------------------------
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-- Data Maintenance
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-------------------------------------------------------------------------------
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local function data_maintenance()
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print("[Tubelib] Data maintenance started")
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if Version == 1 then
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-- Add day_count for aging of unused positions
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for num,item in pairs(Number2Pos) do
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if Number2Pos[num].name == nil then
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Number2Pos[num].time = minetest.get_day_count()
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end
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end
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Version = 2
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else
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-- Remove old unused positions
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local Tbl = table.copy(Number2Pos)
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Number2Pos = {}
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local day_cnt = minetest.get_day_count()
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for num,item in pairs(Tbl) do
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if item.name then
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Number2Pos[num] = item
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-- data not older than 5 real days
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elseif item.time and (item.time + 360) > day_cnt then
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Number2Pos[num] = item
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else
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print("Position deleted", num)
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end
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end
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end
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print("[Tubelib] Data maintenance finished")
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end
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generate_Key2Number()
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-- maintain data after one minute
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-- (minetest.get_day_count() will not be valid at start time)
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minetest.after(60, data_maintenance)
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