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local filename=minetest.get_worldpath() .. "/teleport_tubes"
local function read_file()
local f = io.open(filename, "r")
if f == nil then return {} end
local t = f:read("*all")
f:close()
if t == "" or t == nil then return {} end
return minetest.deserialize(t)
end
local function write_file(tbl)
local f = io.open(filename, "w")
f:write(minetest.serialize(tbl))
f:close()
end
local function update_pos_in_file(pos)
local tbl=read_file()
for _, val in ipairs(tbl) do
if val.x == pos.x and val.y == pos.y and val.z == pos.z then
local meta = minetest.get_meta(val)
val.channel = meta:get_string("channel")
val.cr = meta:get_int("can_receive")
end
end
write_file(tbl)
end
local function add_tube_in_file(pos,channel, cr)
local tbl=read_file()
for _,val in ipairs(tbl) do
if val.x==pos.x and val.y==pos.y and val.z==pos.z then
return
end
end
table.insert(tbl,{x=pos.x,y=pos.y,z=pos.z,channel=channel,cr=cr})
write_file(tbl)
end
local function remove_tube_in_file(pos)
local tbl = read_file()
local newtbl = {}
for _, val in ipairs(tbl) do
if val.x ~= pos.x or val.y ~= pos.y or val.z ~= pos.z then
table.insert(newtbl, val)
end
end
write_file(newtbl)
end
local function read_node_with_vm(pos)
local vm = VoxelManip()
local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
local data = vm:get_data()
local area = VoxelArea:new({MinEdge = MinEdge, MaxEdge = MaxEdge})
return minetest.get_name_from_content_id(data[area:index(pos.x, pos.y, pos.z)])
end
local function get_tubes_in_file(pos,channel)
local tbl = read_file()
local newtbl = {}
local changed = false
for _, val in ipairs(tbl) do
local meta = minetest.get_meta(val)
local name = read_node_with_vm(val)
local is_loaded = (minetest.get_node_or_nil(val) ~= nil)
local is_teleport_tube = minetest.registered_nodes[name] and minetest.registered_nodes[name].is_teleport_tube
if is_teleport_tube then
if is_loaded and (val.channel ~= meta:get_string("channel") or val.cr ~= meta:get_int("can_receive")) then
val.channel = meta:get_string("channel")
val.cr = meta:get_int("can_receive")
changed = true
end
if val.cr == 1 and val.channel == channel and (val.x ~= pos.x or val.y ~= pos.y or val.z ~= pos.z) then
table.insert(newtbl, val)
end
else
val.to_remove = true
changed = true
end
end
if changed then
local updated = {}
for _, val in ipairs(tbl) do
if not val.to_remove then
table.insert(updated, val)
end
end
write_file(updated)
end
return newtbl
end
local teleport_noctr_textures={"pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png",
"pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png"}
local teleport_plain_textures={"pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png",
"pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png"}
local teleport_end_textures={"pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png",
"pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png"}
local teleport_short_texture="pipeworks_teleport_tube_short.png"
local teleport_inv_texture="pipeworks_teleport_tube_inv.png"
local function set_teleport_tube_formspec(meta)
local cr = meta:get_int("can_receive") ~= 0
meta:set_string("formspec","size[10.5,1;]"..
"field[0,0.5;7,1;channel;Channel:;${channel}]"..
"button[8,0;2.5,1;"..(cr and "cr0" or "cr1")..";"..
(cr and "Send and Receive" or "Send only").."]")
end
pipeworks.register_tube("pipeworks:teleport_tube","Teleporting Pneumatic Tube Segment",teleport_plain_textures,
teleport_noctr_textures,teleport_end_textures,teleport_short_texture,teleport_inv_texture, {
is_teleport_tube = true,
tube = {
can_go = function(pos,node,velocity,stack)
velocity.x = 0
velocity.y = 0
velocity.z = 0
local meta = minetest.get_meta(pos)
local channel = meta:get_string("channel")
local target = get_tubes_in_file(pos,channel)
if target[1] == nil then return {} end
local d = math.random(1,#target)
pos.x = target[d].x
pos.y = target[d].y
pos.z = target[d].z
return pipeworks.meseadjlist
end
},
on_construct = function(pos)
local meta = minetest.get_meta(pos)
meta:set_string("channel","")
meta:set_int("can_receive",1)
add_tube_in_file(pos,"")
set_teleport_tube_formspec(meta)
end,
on_receive_fields = function(pos,formname,fields,sender)
local meta = minetest.get_meta(pos)
--check for private channels
if fields.channel ~= nil then
local name, mode = fields.channel:match("^([^:;]+)([:;])")
if name and mode and name ~= sender:get_player_name() then
--channels starting with '[name]:' can only be used by the named player
if mode == ":" then
minetest.chat_send_player(sender:get_player_name(), "Sorry, channel '"..fields.channel.."' is reserved for exclusive use by "..name)
return
--channels starting with '[name];' can be used by other players, but cannot be received from
elseif mode == ";" and (fields.cr1 or (meta:get_int("can_receive") ~= 0 and not fields.cr0)) then
minetest.chat_send_player(sender:get_player_name(), "Sorry, receiving from channel '"..fields.channel.."' is reserved for "..name)
return
end
end
end
if fields.channel==nil then fields.channel=meta:get_string("channel") end
meta:set_string("channel",fields.channel)
remove_tube_in_file(pos)
if fields.cr0 then meta:set_int("can_receive", 0) end
if fields.cr1 then meta:set_int("can_receive", 1) end
local cr = meta:get_int("can_receive")
add_tube_in_file(pos, fields.channel, meta:get_int("can_receive"))
set_teleport_tube_formspec(meta)
end,
on_destruct = function(pos)
remove_tube_in_file(pos)
end})
if minetest.get_modpath("mesecons_mvps") ~= nil then
mesecon.register_on_mvps_move(function(moved_nodes)
for _, n in ipairs(moved_nodes) do
if string.find(n.node.name, "pipeworks:teleport_tube") ~= nil then
update_pos_in_file(n.pos)
end
end
end)
end
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