mirror of
https://github.com/mt-mods/pipeworks.git
synced 2024-11-18 08:10:41 +01:00
243 lines
8.1 KiB
Lua
243 lines
8.1 KiB
Lua
local filename=minetest.get_worldpath() .. "/teleport_tubes"
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local tp_tube_db = nil -- nil forces a read
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local tp_tube_db_version = 2.0
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local function hash(pos)
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return string.format("%d", minetest.hash_node_position(pos))
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end
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local function save_tube_db()
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local file, err = io.open(filename, "w")
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if file then
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tp_tube_db.version = tp_tube_db_version
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file:write(minetest.serialize(tp_tube_db))
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tp_tube_db.version = nil
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io.close(file)
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else
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error(err)
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end
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end
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local function migrate_tube_db()
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local tmp_db = {}
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tp_tube_db.version = nil
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for key, val in pairs(tp_tube_db) do
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if(val.channel ~= "") then -- skip unconfigured tubes
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tmp_db[hash(val)] = val
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end
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end
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tp_tube_db = tmp_db
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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 file = io.open(filename, "r")
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if file ~= nil then
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local file_content = file:read("*all")
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io.close(file)
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if file_content and file_content ~= "" then
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tp_tube_db = minetest.deserialize(file_content)
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if(not tp_tube_db.version or tonumber(tp_tube_db.version) < tp_tube_db_version) then
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migrate_tube_db()
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end
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tp_tube_db.version = nil -- we add it back when saving
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return tp_tube_db -- we read sucessfully
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end
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end
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tp_tube_db = {}
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return tp_tube_db
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end
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-- updates or adds a tube
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local function set_tube(pos, channel, can_receive)
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local tubes = tp_tube_db or read_tube_db()
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local hash = hash(pos)
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local tube = tubes[hash]
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if tube then
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tube.channel = channel
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tube.cr = can_receive
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save_tube_db()
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return
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end
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-- we haven't found any tp tube to update, so lets add it
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tp_tube_db[hash] = {x=pos.x,y=pos.y,z=pos.z,channel=channel,cr=can_receive}
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save_tube_db()
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end
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local function remove_tube(pos)
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local tubes = tp_tube_db or read_tube_db()
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tubes[hash(pos)] = nil
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save_tube_db()
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end
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local function read_node_with_vm(pos)
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local vm = VoxelManip()
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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 area = VoxelArea:new({MinEdge = MinEdge, MaxEdge = MaxEdge})
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return minetest.get_name_from_content_id(data[area:index(pos.x, pos.y, pos.z)])
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end
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local function get_receivers(pos, channel)
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local tubes = tp_tube_db or read_tube_db()
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local receivers = {}
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local dirty = false
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for key, val in pairs(tubes) do
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-- skip all non-receivers and the tube that it came from as early as possible, as this is called often
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if (val.cr == 1 and val.channel == channel and (val.x ~= pos.x or val.y ~= pos.y or val.z ~= pos.z)) then
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local is_loaded = (minetest.get_node_or_nil(val) ~= nil)
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local node_name = is_loaded and minetest.get_node(pos).name or read_node_with_vm(val)
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if minetest.registered_nodes[node_name] and minetest.registered_nodes[node_name].is_teleport_tube then
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table.insert(receivers, val)
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else
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tp_tube_db[key] = nil
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dirty = true
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end
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end
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end
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if dirty then
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save_tube_db()
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end
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return receivers
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end
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local teleport_noctr_textures={"pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png",
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"pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png"}
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local teleport_plain_textures={"pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png",
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"pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png"}
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local teleport_end_textures={"pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png",
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"pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png"}
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local teleport_short_texture="pipeworks_teleport_tube_short.png"
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local teleport_inv_texture="pipeworks_teleport_tube_inv.png"
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local function update_meta(meta, can_receive)
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meta:set_int("can_receive", can_receive and 1 or 0)
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local cr_state = can_receive and "on" or "off"
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meta:set_string("formspec","size[8.6,2.2]"..
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"field[0.6,0.6;7,1;channel;Channel:;${channel}]"..
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"label[7.3,0;Receive]"..
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"image_button[7.3,0.3;1,1;pipeworks_button_" .. cr_state .. ".png;cr" .. (can_receive and 0 or 1) .. ";;;false;pipeworks_button_interm.png]"..
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"label[0.3,1.3;channels are public by default]" ..
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"label[0.3,1.6;use <player>:<channel> for fully private channels]" ..
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"label[0.3,1.9;use <player>\\;<channel> for private receivers]" ..
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default.gui_bg..
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default.gui_bg_img)
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end
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pipeworks.register_tube("pipeworks:teleport_tube","Teleporting Pneumatic Tube Segment",teleport_plain_textures,
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teleport_noctr_textures,teleport_end_textures,teleport_short_texture,teleport_inv_texture, {
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is_teleport_tube = true,
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tube = {
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can_go = function(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 channel = minetest.get_meta(pos):get_string("channel")
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if channel == "" then return {} end
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local target = get_receivers(pos, channel)
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if target[1] == nil then return {} end
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local d = math.random(1,#target)
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pos.x = target[d].x
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pos.y = target[d].y
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pos.z = target[d].z
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return pipeworks.meseadjlist
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end
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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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update_meta(meta, true)
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meta:set_string("infotext", "unconfigured Teleportation Tube")
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end,
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on_receive_fields = function(pos,formname,fields,sender)
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if not fields.channel then
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return -- ignore escaping or clientside manipulation of the form
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end
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local meta = minetest.get_meta(pos)
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local can_receive = meta:get_int("can_receive")
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-- check for private channels each time before actually changing anything
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-- to not even allow switching between can_receive states of private channels
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if fields.channel ~= "" then
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local sender_name = sender:get_player_name()
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local name, mode = fields.channel:match("^([^:;]+)([:;])")
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if name and mode and name ~= sender_name then
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--channels starting with '[name]:' can only be used by the named player
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if mode == ":" then
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minetest.chat_send_player(sender_name, "Sorry, channel '"..fields.channel.."' is reserved for exclusive use by "..name)
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return
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--channels starting with '[name];' can be used by other players, but cannot be received from
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elseif mode == ";" and (fields.cr1 or (can_receive ~= 0 and not fields.cr0)) then
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minetest.chat_send_player(sender_name, "Sorry, receiving from channel '"..fields.channel.."' is reserved for "..name)
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return
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end
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end
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end
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local dirty = false
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-- was the channel changed?
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local channel = meta:get_string("channel")
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if fields.channel ~= channel then
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channel = fields.channel
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meta:set_string("channel", channel)
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dirty = true
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end
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-- test if a can_receive button was pressed
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if fields.cr0 and can_receive ~= 0 then
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can_receive = 0
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update_meta(meta, false)
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dirty = true
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elseif fields.cr1 and can_receive ~= 1 then
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can_receive = 1
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update_meta(meta, true)
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dirty = true
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end
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-- save if we changed something, handle the empty channel while we're at it
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if dirty then
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if channel ~= "" then
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set_tube(pos, channel, can_receive)
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local cr_description = (can_receive == 1) and "sending and receiving" or "sending"
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meta:set_string("infotext", string.format("Teleportation Tube %s on '%s'", cr_description, channel))
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else
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-- remove empty channel tubes, to not have to search through them
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remove_tube(pos)
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meta:set_string("infotext", "unconfigured Teleportation Tube")
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end
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end
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end,
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on_destruct = function(pos)
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remove_tube(pos)
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end
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})
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minetest.register_craft( {
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output = "pipeworks:teleport_tube_1 2",
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recipe = {
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{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
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{ "default:desert_stone", "default:mese_block", "default:desert_stone" },
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{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
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},
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})
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if minetest.get_modpath("mesecons_mvps") ~= nil then
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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 string.find(n.node.name, "pipeworks:teleport_tube") ~= nil 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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