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filename=minetest.get_worldpath() .. "/teleport_tubes"
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
function write_file(tbl)
local f = io.open(filename, "w")
f:write(minetest.serialize(tbl))
f:close()
end
function add_tube_in_file(pos,channel)
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})
write_file(tbl)
end
function remove_tube_in_file(pos)
tbl=read_file()
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
function get_tubes_in_file(pos,channel)
tbl=read_file()
newtbl={}
for _,val in ipairs(tbl) do
if val.channel==channel and (val.x~=pos.x or val.y~=pos.y or val.z~=pos.z) then
table.insert(newtbl,val)
end
end
return newtbl
end
register_tube("pipeworks:teleport_tube","Teleporter pneumatic tube segment",plain_textures,noctr_textures,end_textures,
short_texture,inv_texture,
{tube={can_go=function(pos,node,velocity,stack)
velocity.x=0
velocity.y=0
velocity.z=0
local meta = minetest.env:get_meta(pos)
channel=meta:get_string("channel")
goto=get_tubes_in_file(pos,channel)
if goto[1]==nil then return {} end
pos.x=goto[1].x
pos.y=goto[1].y
pos.z=goto[1].z
return meseadjlist
end},
on_construct = function(pos)
local meta = minetest.env:get_meta(pos)
meta:set_string("channel","0")
meta:set_string("formspec","size[9,1;]field[0,0.5;9,1;channel;Channel:;${channel}]")
add_tube_in_file(pos,"0")
end,
on_receive_fields = function(pos,formname,fields,sender)
local meta = minetest.env:get_meta(pos)
meta:set_string("channel",fields.channel)
remove_tube_in_file(pos)
add_tube_in_file(pos,fields.channel)
end,
after_dig_node = function(pos)
remove_tube_in_file(pos)
end})
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