pipeworks/teleport_tube.lua

374 righe
10 KiB
Lua

local S = minetest.get_translator("pipeworks")
local filename = minetest.get_worldpath().."/teleport_tubes" -- Only used for backward-compat
local storage = minetest.get_mod_storage()
local enable_logging = minetest.settings:get_bool("pipeworks_log_teleport_tubes", false)
local has_digilines = minetest.get_modpath("digilines")
-- V1: Serialized text file indexed by vector position.
-- V2: Serialized text file indexed by hash position.
-- V3: Mod storage using serialized tables.
-- V4: Mod storage using "<can_receive>:<channel>" format.
local tube_db_version = 4
local tube_db = {}
local receiver_cache = {}
local function hash_pos(pos)
vector.round(pos)
return string.format("%.0f", minetest.hash_node_position(pos))
end
local function serialize_tube(tube)
return string.format("%d:%s", tube.cr, tube.channel)
end
local function deserialize_tube(hash, str)
local sep = str:sub(2, 2) == ":"
local cr = tonumber(str:sub(1, 1))
local channel = str:sub(3)
if sep and cr and channel then
local pos = minetest.get_position_from_hash(tonumber(hash))
return {x = pos.x, y = pos.y, z = pos.z, cr = cr, channel = channel}
end
end
local function save_tube_db()
receiver_cache = {}
local fields = {version = tube_db_version}
for key, val in pairs(tube_db) do
fields[key] = serialize_tube(val)
end
storage:from_table({fields = fields})
end
local function save_tube(hash)
local tube = tube_db[hash]
receiver_cache[tube.channel] = nil
storage:set_string(hash, serialize_tube(tube))
end
local function remove_tube(pos)
local hash = hash_pos(pos)
if tube_db[hash] then
receiver_cache[tube_db[hash].channel] = nil
tube_db[hash] = nil
storage:set_string(hash, "")
end
end
local function migrate_tube_db()
if storage:get_int("version") == 3 then
for key, val in pairs(storage:to_table().fields) do
if tonumber(key) then
tube_db[key] = minetest.deserialize(val)
elseif key ~= "version" then
error("Unknown field in teleport tube database: "..key)
end
end
save_tube_db()
return
end
local file = io.open(filename, "r")
if file then
local content = file:read("*all")
io.close(file)
if content and content ~= "" then
tube_db = minetest.deserialize(content)
end
end
local version = tube_db.version or 0
tube_db.version = nil
if version < 2 then
local tmp_db = {}
for _, val in pairs(tube_db) do
if val.channel ~= "" then -- Skip unconfigured tubes
tmp_db[hash_pos(val)] = val
end
end
tube_db = tmp_db
end
save_tube_db()
end
local function read_tube_db()
local version = storage:get_int("version")
if version < tube_db_version then
migrate_tube_db()
elseif version > tube_db_version then
error("Cannot read teleport tube database of version "..version)
else
for key, val in pairs(storage:to_table().fields) do
if tonumber(key) then
tube_db[key] = deserialize_tube(key, val)
elseif key ~= "version" then
error("Unknown field in teleport tube database: "..key)
end
end
end
tube_db.version = nil
end
local function set_tube(pos, channel, cr)
local hash = hash_pos(pos)
local tube = tube_db[hash]
if tube then
if tube.channel ~= channel or tube.cr ~= cr then
tube.channel = channel
tube.cr = cr
save_tube(hash)
end
else
tube_db[hash] = {x = pos.x, y = pos.y, z = pos.z, channel = channel, cr = cr}
save_tube(hash)
end
end
local function get_receivers(pos, channel)
local hash = hash_pos(pos)
local cache = receiver_cache[channel] or {}
if cache[hash] then
return cache[hash]
end
local receivers = {}
for key, val in pairs(tube_db) do
if val.cr == 1 and val.channel == channel and not vector.equals(val, pos) then
minetest.load_area(val)
local node_name = minetest.get_node(val).name
if node_name:find("pipeworks:teleport_tube") then
table.insert(receivers, val)
else
remove_tube(val)
end
end
end
cache[hash] = receivers
receiver_cache[channel] = cache
return receivers
end
local help_text = minetest.formspec_escape(
S("Channels are public by default").."\n"..
S("Use <player>:<channel> for fully private channels").."\n"..
S("Use <player>;<channel> for private receivers")
)
local size = has_digilines and "8,5.9" or "8,4.4"
local formspec = "formspec_version[2]size["..size.."]"..
pipeworks.fs_helpers.get_prepends(size)..
"image[0.5,0.3;1,1;pipeworks_teleport_tube_inv.png]"..
"label[1.75,0.8;"..S("Teleporting Tube").."]"..
"field[0.5,1.7;5,0.8;channel;"..S("Channel")..";${channel}]"..
"button_exit[5.5,1.7;2,0.8;save;"..S("Save").."]"..
"label[6.5,0.6;"..S("Receive").."]"..
"label[0.5,2.8;"..help_text.."]"
if has_digilines then
formspec = formspec..
"field[0.5,4.6;5,0.8;digiline_channel;"..S("Digiline Channel")..";${digiline_channel}]"..
"button_exit[5.5,4.6;2,0.8;save;"..S("Save").."]"
end
local function update_meta(meta)
local channel = meta:get_string("channel")
local cr = meta:get_int("can_receive") == 1
if channel == "" then
meta:set_string("infotext", S("Unconfigured Teleportation Tube"))
else
local desc = cr and "sending and receiving" or "sending"
meta:set_string("infotext", S("Teleportation Tube @1 on '@2'", desc, channel))
end
local state = cr and "on" or "off"
meta:set_string("formspec", formspec..
"image_button[6.4,0.8;1,0.6;pipeworks_button_"..state..
".png;cr_"..state..";;;false;pipeworks_button_interm.png]")
end
local function update_tube(pos, channel, cr, player_name)
local meta = minetest.get_meta(pos)
if meta:get_string("channel") == channel and meta:get_int("can_receive") == cr then
return
end
if channel == "" then
meta:set_string("channel", "")
meta:set_int("can_receive", cr)
remove_tube(pos)
return
end
local name, mode = channel:match("^([^:;]+)([:;])")
if name and mode and name ~= player_name then
if mode == ":" then
minetest.chat_send_player(player_name,
S("Sorry, channel '@1' is reserved for exclusive use by @2", channel, name))
return
elseif mode == ";" and cr ~= 0 then
minetest.chat_send_player(player_name,
S("Sorry, receiving from channel '@1' is reserved for @2", channel, name))
return
end
end
meta:set_string("channel", channel)
meta:set_int("can_receive", cr)
set_tube(pos, channel, cr)
end
local function receive_fields(pos, _, fields, sender)
if not fields.channel or not pipeworks.may_configure(pos, sender) then
return
end
local meta = minetest.get_meta(pos)
local channel = fields.channel:trim()
local cr = meta:get_int("can_receive")
if fields.cr_on then
cr = 0
elseif fields.cr_off then
cr = 1
end
if has_digilines and fields.digiline_channel then
meta:set_string("digiline_channel", fields.digiline_channel)
end
update_tube(pos, channel, cr, sender:get_player_name())
update_meta(meta)
end
local function can_go(pos, node, velocity, stack)
velocity.x = 0
velocity.y = 0
velocity.z = 0
local src_meta = minetest.get_meta(pos)
local channel = src_meta:get_string("channel")
if channel == "" then
return {}
end
local receivers = get_receivers(pos, channel)
if #receivers == 0 then
return {}
end
local target = receivers[math.random(1, #receivers)]
if enable_logging then
local src_owner = src_meta:get_string("owner")
local dst_meta = minetest.get_meta(pos)
local dst_owner = dst_meta:get_string("owner")
minetest.log("action", string.format("[pipeworks] %s teleported from %s (owner=%s) to %s (owner=%s) via %s",
stack:to_string(), minetest.pos_to_string(pos), src_owner, minetest.pos_to_string(target), dst_owner, channel
))
end
pos.x = target.x
pos.y = target.y
pos.z = target.z
return pipeworks.meseadjlist
end
local function repair_tube(pos, node)
minetest.swap_node(pos, {name = node.name, param2 = node.param2})
pipeworks.scan_for_tube_objects(pos)
local meta = minetest.get_meta(pos)
local channel = meta:get_string("channel")
if channel ~= "" then
set_tube(pos, channel, meta:get_int("can_receive"))
end
update_meta(meta)
end
local function digiline_action(pos, _, digiline_channel, msg)
local meta = minetest.get_meta(pos)
if digiline_channel ~= meta:get_string("digiline_channel") then
return
end
local channel = meta:get_string("channel")
local can_receive = meta:get_int("can_receive")
if type(msg) == "string" then
channel = msg
elseif type(msg) == "table" then
if type(msg.channel) == "string" then
channel = msg.channel
end
if msg.can_receive == 1 or msg.can_receive == true then
can_receive = 1
elseif msg.can_receive == 0 or msg.can_receive == false then
can_receive = 0
end
else
return
end
local player_name = meta:get_string("owner")
update_tube(pos, channel, can_receive, player_name)
update_meta(meta)
end
local def = {
tube = {
can_go = can_go,
on_repair = repair_tube,
},
on_construct = function(pos)
local meta = minetest.get_meta(pos)
meta:set_int("can_receive", 1) -- Enabled by default
update_meta(meta)
end,
on_receive_fields = receive_fields,
on_destruct = remove_tube,
}
if has_digilines then
def.after_place_node = function(pos, placer)
-- Set owner for digilines
minetest.get_meta(pos):set_string("owner", placer:get_player_name())
pipeworks.after_place(pos)
end
def.digiline = {
receptor = {
rules = pipeworks.digilines_rules,
},
effector = {
rules = pipeworks.digilines_rules,
action = digiline_action,
}
}
end
pipeworks.register_tube("pipeworks:teleport_tube", {
description = S("Teleporting Pneumatic Tube Segment"),
inventory_image = "pipeworks_teleport_tube_inv.png",
noctr = { "pipeworks_teleport_tube_noctr.png" },
plain = { "pipeworks_teleport_tube_plain.png" },
ends = { "pipeworks_teleport_tube_end.png" },
short = "pipeworks_teleport_tube_short.png",
node_def = def,
})
if minetest.get_modpath("mesecons_mvps") then
-- Update tubes when moved by pistons
mesecon.register_on_mvps_move(function(moved_nodes)
for _, n in ipairs(moved_nodes) do
if n.node.name:find("pipeworks:teleport_tube") then
local meta = minetest.get_meta(n.pos)
set_tube(n.pos, meta:get_string("channel"), meta:get_int("can_receive"))
end
end
end)
end
-- Expose teleport tube database API for other mods
pipeworks.tptube = {
version = tube_db_version,
hash = hash_pos,
get_db = function() return tube_db end,
save_tube_db = save_tube_db,
set_tube = set_tube,
save_tube = save_tube,
update_tube = update_tube,
update_meta = function(meta, cr)
-- Legacy behaviour
if cr ~= nil then
meta:set_int("can_receive", cr and 1 or 0)
end
update_meta(meta)
end,
}
-- Load the database
read_tube_db()