1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
local filename=minetest.get_worldpath() .. "/teleport_tubes"
local tp_tube_db = nil -- nil forces a read
local tp_tube_db_version = 2.0
local function hash(pos)
return string.format("%d", minetest.hash_node_position(pos))
end
local function save_tube_db()
local file, err = io.open(filename, "w")
if file then
tp_tube_db.version = tp_tube_db_version
file:write(minetest.serialize(tp_tube_db))
tp_tube_db.version = nil
io.close(file)
else
error(err)
end
end
local function migrate_tube_db()
local tmp_db = {}
tp_tube_db.version = nil
for key, val in pairs(tp_tube_db) do
if(val.channel ~= "") then -- skip unconfigured tubes
tmp_db[hash(val)] = val
end
end
tp_tube_db = tmp_db
save_tube_db()
end
local function read_tube_db()
local file = io.open(filename, "r")
if file ~= nil then
local file_content = file:read("*all")
io.close(file)
if file_content and file_content ~= "" then
tp_tube_db = minetest.deserialize(file_content)
if(not tp_tube_db.version or tonumber(tp_tube_db.version) < tp_tube_db_version) then
migrate_tube_db()
end
tp_tube_db.version = nil -- we add it back when saving
return tp_tube_db -- we read sucessfully
end
end
tp_tube_db = {}
return tp_tube_db
end
-- updates or adds a tube
local function set_tube(pos, channel, can_receive)
local tubes = tp_tube_db or read_tube_db()
local hash = hash(pos)
local tube = tubes[hash]
if tube then
tube.channel = channel
tube.cr = can_receive
save_tube_db()
return
end
-- we haven't found any tp tube to update, so lets add it
tp_tube_db[hash] = {x=pos.x,y=pos.y,z=pos.z,channel=channel,cr=can_receive}
save_tube_db()
end
local function remove_tube(pos)
local tubes = tp_tube_db or read_tube_db()
tubes[hash(pos)] = nil
save_tube_db()
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_receivers(pos, channel)
local tubes = tp_tube_db or read_tube_db()
local receivers = {}
local dirty = false
for key, val in pairs(tubes) do
-- skip all non-receivers and the tube that it came from as early as possible, as this is called often
if (val.cr == 1 and val.channel == channel and (val.x ~= pos.x or val.y ~= pos.y or val.z ~= pos.z)) then
local is_loaded = (minetest.get_node_or_nil(val) ~= nil)
local node_name = is_loaded and minetest.get_node(pos).name or read_node_with_vm(val)
if minetest.registered_nodes[node_name] and minetest.registered_nodes[node_name].is_teleport_tube then
table.insert(receivers, val)
else
tp_tube_db[key] = nil
dirty = true
end
end
end
if dirty then
save_tube_db()
end
return receivers
end
local function update_meta(meta, can_receive)
meta:set_int("can_receive", can_receive and 1 or 0)
local cr_state = can_receive and "on" or "off"
meta:set_string("formspec","size[8.6,2.2]"..
"field[0.6,0.6;7,1;channel;Channel:;${channel}]"..
"label[7.3,0;Receive]"..
"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]"..
"image[0.3,1.3;1,1;pipeworks_teleport_tube_inv.png]"..
"label[1.6,1.2;channels are public by default]" ..
"label[1.6,1.5;use <player>:<channel> for fully private channels]" ..
"label[1.6,1.8;use <player>\\;<channel> for private receivers]" ..
default.gui_bg..
default.gui_bg_img)
end
pipeworks.register_tube("pipeworks:teleport_tube", {
description = "Teleporting Pneumatic Tube Segment",
inventory_image = "pipeworks_teleport_tube_inv.png",
noctr = { "pipeworks_teleport_tube_noctr.png" },
plain = { "pipeworks_teleport_tube_plain.png" },
ends = { "pipeworks_teleport_tube_end.png" },
short = "pipeworks_teleport_tube_short.png",
node_def = {
is_teleport_tube = true,
tube = {
can_go = function(pos,node,velocity,stack)
velocity.x = 0
velocity.y = 0
velocity.z = 0
local channel = minetest.get_meta(pos):get_string("channel")
if channel == "" then return {} end
local target = get_receivers(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)
update_meta(meta, true)
meta:set_string("infotext", "unconfigured Teleportation Tube")
end,
on_receive_fields = function(pos,formname,fields,sender)
if not fields.channel then
return -- ignore escaping or clientside manipulation of the form
end
local meta = minetest.get_meta(pos)
local can_receive = meta:get_int("can_receive")
-- check for private channels each time before actually changing anything
-- to not even allow switching between can_receive states of private channels
if fields.channel ~= "" then
local sender_name = sender:get_player_name()
local name, mode = fields.channel:match("^([^:;]+)([:;])")
if name and mode and name ~= sender_name then
--channels starting with '[name]:' can only be used by the named player
if mode == ":" then
minetest.chat_send_player(sender_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 (can_receive ~= 0 and not fields.cr0)) then
minetest.chat_send_player(sender_name, "Sorry, receiving from channel '"..fields.channel.."' is reserved for "..name)
return
end
end
end
local dirty = false
-- was the channel changed?
local channel = meta:get_string("channel")
if fields.channel ~= channel then
channel = fields.channel
meta:set_string("channel", channel)
dirty = true
end
-- test if a can_receive button was pressed
if fields.cr0 and can_receive ~= 0 then
can_receive = 0
update_meta(meta, false)
dirty = true
elseif fields.cr1 and can_receive ~= 1 then
can_receive = 1
update_meta(meta, true)
dirty = true
end
-- save if we changed something, handle the empty channel while we're at it
if dirty then
if channel ~= "" then
set_tube(pos, channel, can_receive)
local cr_description = (can_receive == 1) and "sending and receiving" or "sending"
meta:set_string("infotext", string.format("Teleportation Tube %s on '%s'", cr_description, channel))
else
-- remove empty channel tubes, to not have to search through them
remove_tube(pos)
meta:set_string("infotext", "unconfigured Teleportation Tube")
end
end
end,
on_destruct = function(pos)
remove_tube(pos)
end
},
})
minetest.register_craft( {
output = "pipeworks:teleport_tube_1 2",
recipe = {
{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
{ "default:desert_stone", "default:mese_block", "default:desert_stone" },
{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
},
})
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
local meta = minetest.get_meta(n.pos)
set_tube(n.pos, meta:get_string("channel"), meta:get_int("can_receive"))
end
end
end)
end
|
