mirror of
https://github.com/mt-mods/pipeworks.git
synced 2024-11-15 23:10:33 +01:00
375 lines
10 KiB
Lua
375 lines
10 KiB
Lua
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local S = minetest.get_translator("pipeworks")
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local filename = minetest.get_worldpath().."/teleport_tubes" -- Only used for backward-compat
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local storage = minetest.get_mod_storage()
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local enable_logging = minetest.settings:get_bool("pipeworks_log_teleport_tubes", false)
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local has_digilines = minetest.get_modpath("digilines")
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-- V1: Serialized text file indexed by vector position.
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-- V2: Serialized text file indexed by hash position.
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-- V3: Mod storage using serialized tables.
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-- V4: Mod storage using "<can_receive>:<channel>" format.
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local tube_db_version = 4
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local tube_db = {}
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local receiver_cache = {}
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local function hash_pos(pos)
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vector.round(pos)
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return string.format("%.0f", minetest.hash_node_position(pos))
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end
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local function serialize_tube(tube)
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return string.format("%d:%s", tube.cr, tube.channel)
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end
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local function deserialize_tube(hash, str)
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local sep = str:sub(2, 2) == ":"
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local cr = tonumber(str:sub(1, 1))
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local channel = str:sub(3)
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if sep and cr and channel then
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local pos = minetest.get_position_from_hash(tonumber(hash))
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return {x = pos.x, y = pos.y, z = pos.z, cr = cr, channel = channel}
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end
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end
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local function save_tube_db()
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receiver_cache = {}
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local fields = {version = tube_db_version}
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for key, val in pairs(tube_db) do
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fields[key] = serialize_tube(val)
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end
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storage:from_table({fields = fields})
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end
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local function save_tube(hash)
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local tube = tube_db[hash]
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receiver_cache[tube.channel] = nil
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storage:set_string(hash, serialize_tube(tube))
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end
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local function remove_tube(pos)
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local hash = hash_pos(pos)
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if tube_db[hash] then
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receiver_cache[tube_db[hash].channel] = nil
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tube_db[hash] = nil
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storage:set_string(hash, "")
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end
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end
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local function migrate_tube_db()
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if storage:get_int("version") == 3 then
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for key, val in pairs(storage:to_table().fields) do
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if tonumber(key) then
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tube_db[key] = minetest.deserialize(val)
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elseif key ~= "version" then
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error("Unknown field in teleport tube database: "..key)
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end
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end
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save_tube_db()
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return
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end
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local file = io.open(filename, "r")
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if file then
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local content = file:read("*all")
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io.close(file)
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if content and content ~= "" then
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tube_db = minetest.deserialize(content)
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end
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end
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local version = tube_db.version or 0
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tube_db.version = nil
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if version < 2 then
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local tmp_db = {}
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for _, val in pairs(tube_db) do
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if val.channel ~= "" then -- Skip unconfigured tubes
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tmp_db[hash_pos(val)] = val
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end
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end
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tube_db = tmp_db
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end
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save_tube_db()
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end
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local function read_tube_db()
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local version = storage:get_int("version")
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if version < tube_db_version then
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migrate_tube_db()
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elseif version > tube_db_version then
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error("Cannot read teleport tube database of version "..version)
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else
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for key, val in pairs(storage:to_table().fields) do
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if tonumber(key) then
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tube_db[key] = deserialize_tube(key, val)
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elseif key ~= "version" then
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error("Unknown field in teleport tube database: "..key)
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end
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end
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end
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tube_db.version = nil
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end
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local function set_tube(pos, channel, cr)
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local hash = hash_pos(pos)
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local tube = tube_db[hash]
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if tube then
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if tube.channel ~= channel or tube.cr ~= cr then
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tube.channel = channel
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tube.cr = cr
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save_tube(hash)
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end
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else
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tube_db[hash] = {x = pos.x, y = pos.y, z = pos.z, channel = channel, cr = cr}
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save_tube(hash)
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end
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end
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local function get_receivers(pos, channel)
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local hash = hash_pos(pos)
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local cache = receiver_cache[channel] or {}
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if cache[hash] then
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return cache[hash]
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end
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local receivers = {}
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for key, val in pairs(tube_db) do
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if val.cr == 1 and val.channel == channel and not vector.equals(val, pos) then
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minetest.load_area(val)
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local node_name = minetest.get_node(val).name
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if node_name:find("pipeworks:teleport_tube") then
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table.insert(receivers, val)
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else
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remove_tube(val)
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end
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end
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end
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cache[hash] = receivers
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receiver_cache[channel] = cache
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return receivers
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end
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local help_text = minetest.formspec_escape(
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S("Channels are public by default").."\n"..
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S("Use <player>:<channel> for fully private channels").."\n"..
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S("Use <player>;<channel> for private receivers")
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)
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local size = has_digilines and "8,5.9" or "8,4.4"
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local formspec = "formspec_version[2]size["..size.."]"..
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pipeworks.fs_helpers.get_prepends(size)..
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"image[0.5,0.3;1,1;pipeworks_teleport_tube_inv.png]"..
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"label[1.75,0.8;"..S("Teleporting Tube").."]"..
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"field[0.5,1.7;5,0.8;channel;"..S("Channel")..";${channel}]"..
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"button_exit[5.5,1.7;2,0.8;save;"..S("Save").."]"..
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"label[6.5,0.6;"..S("Receive").."]"..
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"label[0.5,2.8;"..help_text.."]"
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if has_digilines then
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formspec = formspec..
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"field[0.5,4.6;5,0.8;digiline_channel;"..S("Digiline Channel")..";${digiline_channel}]"..
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"button_exit[5.5,4.6;2,0.8;save;"..S("Save").."]"
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end
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local function update_meta(meta)
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local channel = meta:get_string("channel")
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local cr = meta:get_int("can_receive") == 1
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if channel == "" then
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meta:set_string("infotext", S("Unconfigured Teleportation Tube"))
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else
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local desc = cr and "sending and receiving" or "sending"
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meta:set_string("infotext", S("Teleportation Tube @1 on '@2'", desc, channel))
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end
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local state = cr and "on" or "off"
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meta:set_string("formspec", formspec..
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"image_button[6.4,0.8;1,0.6;pipeworks_button_"..state..
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".png;cr_"..state..";;;false;pipeworks_button_interm.png]")
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end
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local function update_tube(pos, channel, cr, player_name)
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local meta = minetest.get_meta(pos)
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if meta:get_string("channel") == channel and meta:get_int("can_receive") == cr then
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return
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end
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if channel == "" then
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meta:set_string("channel", "")
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meta:set_int("can_receive", cr)
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remove_tube(pos)
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return
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end
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local name, mode = channel:match("^([^:;]+)([:;])")
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if name and mode and name ~= player_name then
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if mode == ":" then
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minetest.chat_send_player(player_name,
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S("Sorry, channel '@1' is reserved for exclusive use by @2", channel, name))
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return
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elseif mode == ";" and cr ~= 0 then
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minetest.chat_send_player(player_name,
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S("Sorry, receiving from channel '@1' is reserved for @2", channel, name))
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return
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end
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end
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meta:set_string("channel", channel)
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meta:set_int("can_receive", cr)
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set_tube(pos, channel, cr)
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end
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local function receive_fields(pos, _, fields, sender)
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if not fields.channel or not pipeworks.may_configure(pos, sender) then
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return
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end
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local meta = minetest.get_meta(pos)
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local channel = fields.channel:trim()
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local cr = meta:get_int("can_receive")
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if fields.cr_on then
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cr = 0
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elseif fields.cr_off then
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cr = 1
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end
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if has_digilines and fields.digiline_channel then
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meta:set_string("digiline_channel", fields.digiline_channel)
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end
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update_tube(pos, channel, cr, sender:get_player_name())
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update_meta(meta)
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end
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local function can_go(pos, node, velocity, stack)
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velocity.x = 0
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velocity.y = 0
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velocity.z = 0
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local src_meta = minetest.get_meta(pos)
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local channel = src_meta:get_string("channel")
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if channel == "" then
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return {}
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end
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local receivers = get_receivers(pos, channel)
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if #receivers == 0 then
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return {}
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end
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local target = receivers[math.random(1, #receivers)]
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if enable_logging then
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local src_owner = src_meta:get_string("owner")
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local dst_meta = minetest.get_meta(pos)
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local dst_owner = dst_meta:get_string("owner")
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minetest.log("action", string.format("[pipeworks] %s teleported from %s (owner=%s) to %s (owner=%s) via %s",
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stack:to_string(), minetest.pos_to_string(pos), src_owner, minetest.pos_to_string(target), dst_owner, channel
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))
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end
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pos.x = target.x
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pos.y = target.y
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pos.z = target.z
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return pipeworks.meseadjlist
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end
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local function repair_tube(pos, node)
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minetest.swap_node(pos, {name = node.name, param2 = node.param2})
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pipeworks.scan_for_tube_objects(pos)
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local meta = minetest.get_meta(pos)
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local channel = meta:get_string("channel")
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if channel ~= "" then
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set_tube(pos, channel, meta:get_int("can_receive"))
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end
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update_meta(meta)
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end
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local function digiline_action(pos, _, digiline_channel, msg)
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local meta = minetest.get_meta(pos)
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if digiline_channel ~= meta:get_string("digiline_channel") then
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return
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end
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local channel = meta:get_string("channel")
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local can_receive = meta:get_int("can_receive")
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if type(msg) == "string" then
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channel = msg
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elseif type(msg) == "table" then
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if type(msg.channel) == "string" then
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channel = msg.channel
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end
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if msg.can_receive == 1 or msg.can_receive == true then
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can_receive = 1
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elseif msg.can_receive == 0 or msg.can_receive == false then
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can_receive = 0
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end
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else
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return
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end
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local player_name = meta:get_string("owner")
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update_tube(pos, channel, can_receive, player_name)
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update_meta(meta)
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end
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local def = {
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tube = {
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can_go = can_go,
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on_repair = repair_tube,
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},
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on_construct = function(pos)
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local meta = minetest.get_meta(pos)
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meta:set_int("can_receive", 1) -- Enabled by default
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update_meta(meta)
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end,
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on_receive_fields = receive_fields,
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on_destruct = remove_tube,
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}
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if has_digilines then
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def.after_place_node = function(pos, placer)
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-- Set owner for digilines
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minetest.get_meta(pos):set_string("owner", placer:get_player_name())
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pipeworks.after_place(pos)
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end
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def.digiline = {
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receptor = {
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rules = pipeworks.digilines_rules,
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},
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effector = {
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rules = pipeworks.digilines_rules,
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action = digiline_action,
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}
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}
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end
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pipeworks.register_tube("pipeworks:teleport_tube", {
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description = S("Teleporting Pneumatic Tube Segment"),
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inventory_image = "pipeworks_teleport_tube_inv.png",
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noctr = { "pipeworks_teleport_tube_noctr.png" },
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plain = { "pipeworks_teleport_tube_plain.png" },
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ends = { "pipeworks_teleport_tube_end.png" },
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short = "pipeworks_teleport_tube_short.png",
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node_def = def,
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})
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if minetest.get_modpath("mesecons_mvps") then
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-- Update tubes when moved by pistons
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mesecon.register_on_mvps_move(function(moved_nodes)
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for _, n in ipairs(moved_nodes) do
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if n.node.name:find("pipeworks:teleport_tube") then
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local meta = minetest.get_meta(n.pos)
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set_tube(n.pos, meta:get_string("channel"), meta:get_int("can_receive"))
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end
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end
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end)
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end
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-- Expose teleport tube database API for other mods
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pipeworks.tptube = {
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version = tube_db_version,
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hash = hash_pos,
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get_db = function() return tube_db end,
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save_tube_db = save_tube_db,
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remove_tube = remove_tube,
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set_tube = set_tube,
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save_tube = save_tube,
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update_tube = update_tube,
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update_meta = function(meta, cr)
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-- Legacy behaviour
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if cr ~= nil then
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meta:set_int("can_receive", cr and 1 or 0)
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end
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update_meta(meta)
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end,
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}
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-- Load the database
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read_tube_db()
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