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techpack/tubelib/command.lua
Cam B d073560d10 Invalid sides too
2021-01-23 17:34:48 +00:00

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--[[
Tube Library
============
Copyright (C) 2017-2020 Joachim Stolberg
AGPL v3
See LICENSE.txt for more information
command.lua:
See [api.md] for the interface documentation
]]--
--- for lazy programmers
local S = function(pos) if pos then return minetest.pos_to_string(pos) end end
local P = minetest.string_to_pos
local M = minetest.get_meta
local function deserialize(s)
local tbl = {}
for line in s:gmatch("[^;]+") do
local num, spos = unpack(string.split(line, "="))
tbl[num] = {pos = minetest.string_to_pos(spos)}
end
return tbl
end
local function serialize(data)
local tbl = {}
for k,v in pairs(data) do
tbl[#tbl+1] = k.."="..minetest.pos_to_string(v.pos)
end
return table.concat(tbl, ";")
end
-- to convert the data base from v2 to v3
local function extract_data(data)
local tbl = {}
for num,item in pairs(data) do
local new_item = {}
local data_present = false
for k,v in pairs(item) do
if k ~= "name" and k ~= "pos" then
new_item[k] = v
data_present = true
end
end
if data_present then
tbl[num] = new_item
end
end
return tbl
end
------------------------------------------------------------------
-- Data base storage
-------------------------------------------------------------------
local storage = minetest.get_mod_storage()
local NextNumber = minetest.deserialize(storage:get_string("NextNumber")) or 1
local Version = minetest.deserialize(storage:get_string("Version")) or 1
local Number2Pos
local Number2Data
local TemporaryRemovedNodes
if Version == 2 then -- legacy data base
Number2Pos = minetest.deserialize(storage:get_string("Number2Pos")) or {}
Number2Data = extract_data(Number2Pos)
TemporaryRemovedNodes = {}
Version = 3
else
Number2Pos = deserialize(storage:get_string("Number2Pos"))
Number2Data = minetest.deserialize(storage:get_string("Number2Data")) or {}
TemporaryRemovedNodes = minetest.deserialize(storage:get_string("TemporaryRemovedNodes")) or {}
end
local function update_mod_storage()
local t = minetest.get_us_time()
minetest.log("action", "[Tubelib] Store data...")
storage:set_string("NextNumber", minetest.serialize(NextNumber))
storage:set_string("Version", minetest.serialize(Version))
storage:set_string("Number2Pos", serialize(Number2Pos))
storage:set_string("Number2Data", minetest.serialize(Number2Data))
storage:set_string("TemporaryRemovedNodes", minetest.serialize(TemporaryRemovedNodes))
-- store data each hour
minetest.after(60*59, update_mod_storage)
t = minetest.get_us_time() - t
minetest.log("action", "[Tubelib] Data stored. t="..t.."us")
end
minetest.register_on_shutdown(function()
update_mod_storage()
end)
-- store data after one hour
minetest.after(60*59, update_mod_storage)
-- Key2Number will be generated at runtine
local Key2Number = {}
local Name2Name = {} -- translation table
-------------------------------------------------------------------
-- Local helper functions
-------------------------------------------------------------------
-- Localize functions to avoid table lookups (better performance).
local string_find = string.find
local string_split = string.split
local tubelib_NodeDef = tubelib.NodeDef
local Tube = tubelib.Tube
-- Generate a key string based on the given pos table,
-- Used internaly as table key,
local function get_key_str(pos)
pos = minetest.pos_to_string(pos)
return string.sub(pos, 2, -2)
end
-- Determine position related node number for addressing purposes
local function get_number(pos)
local key = get_key_str(pos)
if not Key2Number[key] then
Key2Number[key] = NextNumber
NextNumber = NextNumber + 1
end
return string.format("%.04u", Key2Number[key])
end
local function get_node_lvm(pos)
local node = minetest.get_node_or_nil(pos)
if node then
return node
end
local vm = minetest.get_voxel_manip()
local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
local data = vm:get_data()
local param2_data = vm:get_param2_data()
local area = VoxelArea:new({MinEdge = MinEdge, MaxEdge = MaxEdge})
local idx = area:index(pos.x, pos.y, pos.z)
node = {
name = minetest.get_name_from_content_id(data[idx]),
param2 = param2_data[idx]
}
return node
end
local function generate_Key2Number()
local key
for num,item in pairs(Number2Pos) do
key = get_key_str(item.pos)
Key2Number[key] = num
end
end
local function not_protected(pos, placer_name, clicker_name)
local meta = minetest.get_meta(pos)
if meta then
local cached_name = meta:get_string("tubelib_cached_name")
if placer_name and (placer_name == cached_name or not minetest.is_protected(pos, placer_name)) then
meta:set_string("tubelib_cached_name", placer_name)
if clicker_name == nil or not minetest.is_protected(pos, clicker_name) then
return true
end
end
end
return false
end
local function register_lbm(name, nodenames)
minetest.register_lbm({
label = "[Tubelib] Node update",
name = name.."update",
nodenames = nodenames,
run_at_every_load = true,
action = function(pos, node)
local name = Name2Name[node.name]
if tubelib_NodeDef[name] and tubelib_NodeDef[name].on_node_load then
tubelib_NodeDef[name].on_node_load(pos)
end
end
})
end
local function get_dest_node(pos, side)
local _,node = Tube:get_node(pos)
local dir = tubelib2.side_to_dir(side, node.param2)
local spos, sdir = Tube:get_connected_node_pos(pos, dir)
if not (spos and sdir) then return end
_,node = Tube:get_node(spos)
local out_side = tubelib2.dir_to_side(tubelib2.Turn180Deg[sdir], node.param2)
return spos, out_side, Name2Name[node.name] or node.name
end
local function item_handling_node(name)
local node_def = name and tubelib_NodeDef[name]
if node_def then
return node_def.on_pull_item or node_def.on_push_item or node_def.is_pusher
end
end
-------------------------------------------------------------------
-- API helper functions
-------------------------------------------------------------------
-- Check the given list of numbers.
-- Returns true if number(s) is/are valid and point to real nodes.
function tubelib.check_numbers(numbers)
if numbers then
for _,num in ipairs(string_split(numbers, " ")) do
if Number2Pos[num] == nil then
return false
end
end
return true
end
return false
end
-- Function returns { pos, name } for the node on the given position number.
function tubelib.get_node_info(dest_num)
if Number2Pos[dest_num] then
return Number2Pos[dest_num]
end
return nil
end
-- Function returns the node number from the given position or
-- nil, if no node number for this position is assigned.
function tubelib.get_node_number(pos)
local key = get_key_str(pos)
local num = Key2Number[key]
if num then
num = string.format("%.04u", num)
if Number2Pos[num] and Number2Pos[num].name then
return num
end
end
return nil
end
-- Function is used for available nodes with lost numbers, only.
function tubelib.get_new_number(pos, name)
-- store position
local number = get_number(pos)
Number2Pos[number] = {
pos = pos,
name = name,
}
return number
end
-- Store any node number related, additional data
-- param number: node number, returned by tubelib.add_node
-- param name: name of the data (string)
-- param data: any data (number, string, table)
function tubelib.set_data(number, name, data)
Number2Data[number] = Number2Data[number] or {}
if type(name) == "string" then
Number2Data[number]["u_"..name] = data
end
end
-- Read node number related data
-- param number: node number, returned by tubelib.add_node
-- param name: name of the data (string)
function tubelib.get_data(number, name)
if Number2Data[number] and type(name) == "string" then
return Number2Data[number]["u_"..name]
end
return nil
end
-------------------------------------------------------------------
-- Node construction/destruction functions
-------------------------------------------------------------------
-- Add node to the tubelib lists.
-- Function determines and returns the node position number,
-- needed for message communication.
function tubelib.add_node(pos, name)
if item_handling_node(name) then
Tube:after_place_node(pos)
end
-- store position
local number = get_number(pos)
Number2Pos[number] = {
pos = pos,
name = name,
}
return number
end
-- Function removes the node from the tubelib lists.
function tubelib.remove_node(pos)
local number = get_number(pos)
local name
if Number2Pos[number] then
name = Number2Pos[number].name
Number2Pos[number] = {
pos = pos,
name = nil,
time = minetest.get_day_count() -- used for reservation timeout
}
end
if item_handling_node(name) then
Tube:after_dig_node(pos)
end
end
-------------------------------------------------------------------
-- Node register function
-------------------------------------------------------------------
-- Register node for tubelib communication
-- Call this function only at load time!
-- Param name: The node name like "tubelib:pusher"
-- Param add_names: Alternativ node names if needded, e.g.: "tubelib:pusher_active"
-- Param node_definition: A table according to:
-- {
-- on_pull_item = func(pos, side, player_name),
-- on_push_item = func(pos, side, item, player_name),
-- on_unpull_item = func(pos, side, item, player_name),
-- on_recv_message = func(pos, topic, payload),
-- on_node_load = func(pos), -- LBM function
-- on_node_repair = func(pos), -- repair defect (feature!) nodes
-- }
function tubelib.register_node(name, add_names, node_definition)
tubelib_NodeDef[name] = node_definition
-- store facedir table for all known node names
Name2Name[name] = name
for _,n in ipairs(add_names) do
Name2Name[n] = name
end
if node_definition.on_pull_item or node_definition.on_push_item or
node_definition.is_pusher then
Tube:add_secondary_node_names({name})
Tube:add_secondary_node_names(add_names)
if node_definition.valid_sides then
Tube:set_valid_sides(name, node_definition.valid_sides)
for _,n in ipairs(add_names) do
Tube:set_valid_sides(n, node_definition.valid_sides)
end
end
if node_definition.invalid_sides then
Tube:set_invalid_sides(name, node_definition.invalid_sides)
for _,n in ipairs(add_names) do
Tube:set_invalid_sides(n, node_definition.invalid_sides)
end
end
tubelib.KnownNodes[name] = true
for _,n in ipairs(add_names) do
tubelib.KnownNodes[n] = true
end
end
-- register LBM
if node_definition.on_node_load then
local nodenames = {name}
for _,n in ipairs(add_names) do
nodenames[#nodenames + 1] = n
end
register_lbm(name, nodenames)
end
end
-------------------------------------------------------------------
-- Send message functions
-------------------------------------------------------------------
function tubelib.send_message(numbers, placer_name, clicker_name, topic, payload)
for _,num in ipairs(string_split(numbers, " ")) do
if Number2Pos[num] and Number2Pos[num].name then
local data = Number2Pos[num]
if not_protected(data.pos, placer_name, clicker_name) then
if tubelib_NodeDef[data.name] and tubelib_NodeDef[data.name].on_recv_message then
tubelib_NodeDef[data.name].on_recv_message(data.pos, topic, payload)
end
end
end
end
end
function tubelib.send_request(number, topic, payload)
if Number2Pos[number] and Number2Pos[number].name then
local data = Number2Pos[number]
if tubelib_NodeDef[data.name] and tubelib_NodeDef[data.name].on_recv_message then
return tubelib_NodeDef[data.name].on_recv_message(data.pos, topic, payload)
end
end
return false
end
-- for defect nodes
function tubelib.repair_node(pos)
local node = minetest.get_node(pos)
local name = Name2Name[node.name]
if tubelib_NodeDef[name] and tubelib_NodeDef[name].on_node_repair then
return tubelib_NodeDef[name].on_node_repair(pos)
end
return false
end
-------------------------------------------------------------------
-- Client side Push/Pull item functions
-------------------------------------------------------------------
function tubelib.pull_items(pos, side, player_name)
local npos, nside, name = get_dest_node(pos, side)
if npos == nil then return end
if tubelib_NodeDef[name] and tubelib_NodeDef[name].on_pull_item then
if Tube:is_valid_side(name, nside) == false then
return nil
end
return tubelib_NodeDef[name].on_pull_item(npos, nside, player_name)
end
return nil
end
function tubelib.push_items(pos, side, items, player_name)
local npos, nside, name = get_dest_node(pos, side)
if npos == nil then return end
if tubelib_NodeDef[name] and tubelib_NodeDef[name].on_push_item then
if Tube:is_valid_side(name, nside) == false then
return false
end
return tubelib_NodeDef[name].on_push_item(npos, nside, items, player_name)
elseif name == "air" then
minetest.add_item(npos, items)
return true
end
return false
end
function tubelib.unpull_items(pos, side, items, player_name)
local npos, nside, name = get_dest_node(pos, side)
if npos == nil then return end
if tubelib_NodeDef[name] and tubelib_NodeDef[name].on_unpull_item then
return tubelib_NodeDef[name].on_unpull_item(npos, nside, items, player_name)
end
return false
end
function tubelib.pull_stack(pos, side, player_name)
local npos, nside, name = get_dest_node(pos, side)
if npos == nil then return end
if tubelib_NodeDef[name] then
if Tube:is_valid_side(name, nside) == false then
return nil
end
if tubelib_NodeDef[name].on_pull_stack then
return tubelib_NodeDef[name].on_pull_stack(npos, nside, player_name)
elseif tubelib_NodeDef[name].on_pull_item then
return tubelib_NodeDef[name].on_pull_item(npos, nside, player_name)
end
end
return nil
end
-------------------------------------------------------------------
-- Server side helper functions
-------------------------------------------------------------------
-- Get one item from the given ItemList. The position within the list
-- is incremented each time so that different item stacks will be considered.
-- Returns nil if ItemList is empty.
function tubelib.get_item(meta, listname)
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)
local startpos = meta:get_int("tubelib_startpos") or 0
for idx = startpos, startpos+size do
idx = (idx % size) + 1
local items = inv:get_stack(listname, idx)
if items:get_count() > 0 then
local taken = items:take_item(1)
inv:set_stack(listname, idx, items)
meta:set_int("tubelib_startpos", idx)
return taken
end
end
meta:set_int("tubelib_startpos", 0)
return nil
end
-- Get one (or more) item(s) from the given ItemList, specified by stack number (1..n).
-- Returns nil if ItemList is empty.
function tubelib.get_this_item(meta, listname, list_number, num_items)
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
if num_items == nil then num_items = 1 end
local items = inv:get_stack(listname, list_number)
if items:get_count() > 0 then
local taken = items:take_item(num_items)
inv:set_stack(listname, list_number, items)
return taken
end
return nil
end
-- Put the given item into the given ItemList.
-- 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
if TemporaryRemovedNodes[key] then
local data = table.copy(TemporaryRemovedNodes[key])
TemporaryRemovedNodes[key] = nil
return data
end
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)
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