mods/pipeworks/teleport_tube.lua

   1
   2 local filename=minetest.get_worldpath() .. "/teleport_tubes"
   3
   4 local function read_file()
   5         local f = io.open(filename, "r")
   6         if f==nil then return {} end
   7         local t = f:read("*all")
   8         f:close()
   9         if t=="" or t==nil then return {} end
  10         return minetest.deserialize(t)
  11 end
  12
  13 local function write_file(tbl)
  14         local f = io.open(filename, "w")
  15         f:write(minetest.serialize(tbl))
  16         f:close()
  17 end
  18
  19 local function update_pos_in_file(pos)
  20         local tbl=read_file()
  21         for _,val in ipairs(tbl) do
  22                 if val.x==pos.x and val.y==pos.y and val.z==pos.z then
  23                         local meta = minetest.get_meta(val)
  24                         val.channel = meta:get_string("channel")
  25                         val.cr = meta:get_int("can_receive")
  26                 end
  27         end
  28         write_file(tbl)
  29 end
  30
  31 local function add_tube_in_file(pos,channel, cr)
  32         local tbl=read_file()
  33         for _,val in ipairs(tbl) do
  34                 if val.x==pos.x and val.y==pos.y and val.z==pos.z then
  35                         return
  36                 end
  37         end
  38         table.insert(tbl,{x=pos.x,y=pos.y,z=pos.z,channel=channel,cr=cr})
  39         write_file(tbl)
  40 end
  41
  42 local function remove_tube_in_file(pos)
  43         local tbl=read_file()
  44         local newtbl={}
  45         for _,val in ipairs(tbl) do
  46                 if val.x~=pos.x or val.y~=pos.y or val.z~=pos.z then
  47                         table.insert(newtbl,val)
  48                 end
  49         end
  50         write_file(newtbl)
  51 end
  52
  53 local function get_tubes_in_file(pos,channel)
  54         local tbl=read_file()
  55         local newtbl={}
  56         local changed=false
  57         for _,val in ipairs(tbl) do
  58                 local node = minetest.get_node(val)
  59                 local meta = minetest.get_meta(val)
  60                 -- That shouldn't be needed anymore since the mvps callback, but we leave it nevertheless
  61                 if node.name~="ignore"  and (val.channel~=meta:get_string("channel") or val.cr~=meta:get_int("can_receive")) then
  62                         val.channel=meta:get_string("channel")
  63                         val.cr=meta:get_int("can_receive")
  64                         changed=true
  65                 end
  66                 if val.cr==1 and val.channel==channel and (val.x~=pos.x or val.y~=pos.y or val.z~=pos.z) then
  67                         table.insert(newtbl,val)
  68                 end
  69         end
  70         if changed then write_file(tbl) end
  71         return newtbl
  72 end
  73
  74 local teleport_noctr_textures={"pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png",
  75                 "pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png"}
  76 local teleport_plain_textures={"pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png",
  77                 "pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png"}
  78 local teleport_end_textures={"pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png",
  79                 "pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png"}
  80 local teleport_short_texture="pipeworks_teleport_tube_short.png"
  81 local teleport_inv_texture="pipeworks_teleport_tube_inv.png"
  82
  83 pipeworks.register_tube("pipeworks:teleport_tube","Teleporter Pneumatic Tube Segment",teleport_plain_textures,
  84         teleport_noctr_textures,teleport_end_textures,teleport_short_texture,teleport_inv_texture, {
  85         tube = {
  86                 can_go = function(pos,node,velocity,stack)
  87                         velocity.x = 0
  88                         velocity.y = 0
  89                         velocity.z = 0
  90                         local meta = minetest.get_meta(pos)
  91                         local channel = meta:get_string("channel")
  92                         local target = get_tubes_in_file(pos,channel)
  93                         if target[1] == nil then return {} end
  94                         local d = math.random(1,#target)
  95                         pos.x = target[d].x
  96                         pos.y = target[d].y
  97                         pos.z = target[d].z
  98                         return pipeworks.meseadjlist
  99                 end
 100         },
 101         on_construct = function(pos)
 102                 local meta = minetest.get_meta(pos)
 103                 meta:set_string("channel","")
 104                 meta:set_int("can_receive",1)
 105                 meta:set_string("formspec","size[9,1;]"..
 106                                 "field[0,0.5;7,1;channel;Channel:;${channel}]"..
 107                                 "button[8,0;1,1;bt;On]")
 108                 add_tube_in_file(pos,"")
 109         end,
 110         on_receive_fields = function(pos,formname,fields,sender)
 111                 local meta = minetest.get_meta(pos)
 112
 113                 --check for private channels
 114                 if fields.channel ~= nil then
 115                         local name, mode = fields.channel:match("^([^:;]+)([:;])")
 116                         if name and mode and name ~= sender:get_player_name() then
 117
 118                                 --channels starting with '[name]:' can only be used by the named player
 119                                 if mode == ":" then
 120                                         minetest.chat_send_player(sender:get_player_name(), "Sorry, channel '"..fields.channel.."' is reserved for exclusive use by "..name)
 121                                         return
 122
 123                                 --channels starting with '[name];' can be used by other players, but cannot be received from
 124                                 elseif mode == ";" and (meta:get_int("can_receive") ~= 0) == (fields["bt"] == nil) then
 125                                         minetest.chat_send_player(sender:get_player_name(), "Sorry, receiving from channel '"..fields.channel.."' is reserved for "..name)
 126                                         return
 127                                 end
 128                         end
 129                 end
 130
 131                 if fields.channel==nil then fields.channel=meta:get_string("channel") end
 132                 meta:set_string("channel",fields.channel)
 133                 remove_tube_in_file(pos)
 134                 local cr = meta:get_int("can_receive")
 135                 if fields["bt"] then
 136                         cr=1-cr
 137                         meta:set_int("can_receive",cr)
 138                         if cr==1 then
 139                                 meta:set_string("formspec","size[9,1;]"..
 140                                         "field[0,0.5;7,1;channel;Channel:;${channel}]"..
 141                                         "button[8,0;1,1;bt;On]")
 142                         else
 143                                 meta:set_string("formspec","size[9,1;]"..
 144                                         "field[0,0.5;7,1;channel;Channel:;${channel}]"..
 145                                         "button[8,0;1,1;bt;Off]")
 146                         end
 147                 end
 148                 add_tube_in_file(pos,fields.channel, cr)
 149         end,
 150         on_destruct = function(pos)
 151                 remove_tube_in_file(pos)
 152         end})
 153
 154 if minetest.get_modpath("mesecons_mvps") ~= nil then
 155         mesecon:register_on_mvps_move(function(moved_nodes)
 156                 for _, n in ipairs(moved_nodes) do
 157                         if string.find(n.node.name, "pipeworks:teleport_tube") ~= nil then
 158                                 update_pos_in_file(n.pos)
 159                         end
 160                 end
 161         end)
 162 end