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
|
-- advtrains
-- protection.lua: privileges and rail protection, and some helpers
-- Privileges to control TRAIN DRIVING/COUPLING
minetest.register_privilege("train_operator", {
description = attrans("Can place, remove and operate trains"),
give_to_singleplayer= true,
});
minetest.register_privilege("train_admin", {
description = attrans("Can place, remove and operate any train, regardless of owner, whitelist, or protection"),
give_to_singleplayer= true,
});
-- Privileges to control TRACK BUILDING
minetest.register_privilege("track_builder", {
description = attrans("Can place and dig tracks in unprotected areas"),
give_to_singleplayer= true,
});
-- Privileges to control OPERATING TURNOUTS/SIGNALS
minetest.register_privilege("railway_operator", {
description = attrans("Can operate turnouts and signals in unprotected areas"),
give_to_singleplayer= true,
});
-- there is a configuration option "allow_build_only_owner". If this is active, a player having track_builder can only build rails and operate signals/turnouts in an area explicitly belonging to him
-- (checked using a dummy player called "*dummy*" (which is not an allowed player name))
-- Protection ranges
local npr_r = tonumber(minetest.settings:get("advtrains_prot_range_side")) or 1
local npr_vr = tonumber(minetest.settings:get("advtrains_prot_range_up")) or 3
local npr_vrd = tonumber(minetest.settings:get("advtrains_prot_range_down")) or 1
local boo = minetest.settings:get_bool("advtrains_allow_build_to_owner")
--[[
Protection/privilege concept:
Tracks:
Protected 1 node all around a rail and 4 nodes upward (maybe make this dynamically determined by the rail...)
if track_builder privilege:
if not protected from* player:
if allow_build_only_owner:
if unprotected:
deny
else:
allow
deny
Wagons in general:
Players can only place/destroy wagons if they have train_operator
Wagon driving controls:
The former seat_access tables are unnecessary, instead there is a whitelist for the driving stands
on player trying to access a driver stand:
if is owner or is on whitelist:
allow
else:
deny
Wagon coupling:
Derived from the privileges for driving stands. The whitelist is shared (and also settable on non-driverstand wagons)
for each of the two bordering wagons:
if is owner or is on whitelist:
allow
*"protected from" means the player is not allowed to do things, while "protected by" means that the player is (one of) the owner(s) of this area
]]--
-- temporarily prevent scanning for neighboring rail nodes recursively
local nocheck
local old_is_protected = minetest.is_protected
-- Check if the node we are about to check is in the range of a track that is protected from a player
minetest.is_protected = function(pos, pname)
-- old_is_protected:
-- If an earlier callback decided that pos is protected, we wouldn't have been called
-- if a later callback decides it, get that here.
-- this effectively puts this function into a final-choice position
local oprot = old_is_protected(pos, pname)
if oprot then
return true
end
if nocheck or pname=="" then
return false
end
-- Special exception: to allow seamless rail connections between 2 separately protected
-- networks, rails itself are not affected by the radius setting. So, if the node here is
-- a rail, we skip the check and just use check_track_protection on same pos.
local node = minetest.get_node(pos)
if minetest.get_item_group(node.name, "advtrains_track") > 0 then
-- by here, we know that no other protection callback has this protected, we can safely pass "false".
-- hope this doesn't lead to bugs!
return not advtrains.check_track_protection(pos, pname, nil, false)
end
local nodes = minetest.find_nodes_in_area(
{x = pos.x - npr_r, y = pos.y - npr_vr, z = pos.z - npr_r},
{x = pos.x + npr_r, y = pos.y + npr_vrd, z = pos.z + npr_r},
{"group:advtrains_track"})
for _,npos in ipairs(nodes) do
if not advtrains.check_track_protection(npos, pname, pos) then
return true
end
end
nocheck=false
return false
end
-- Check whether the player is permitted to modify this track
-- Shall be called only for nodes that are or are about to become tracks.
-- The range check from is_track_near_protected is disabled here.
-- this splits in 1. track_builder privilege and 2. is_protected
-- also respects the allow_build_to_owner property.
--WARN: true means here that the action is allowed!
function advtrains.check_track_protection(pos, pname, near, prot_p)
-- Parameter "near" is an optional position, the original node that the player
-- was about to affect, while "pos" represents the checked rail node
-- if "near" is not set, pos is the same node.
local nears = near and "near " or ""
local apos = near or pos
-- note that having protection_bypass implicitly implies having track_builder, because else it would be possible to dig rails
-- (only checked by is_protected, which is not respected) but not place them.
-- We won't impose restrictions on protection_bypass owners.
if minetest.check_player_privs(pname, {protection_bypass = true}) then
return true
end
nocheck = true
local priv = minetest.check_player_privs(pname, {track_builder = true})
-- note: is_protected above already checks the is_protected value against the current player, so checking it again is useless.
local prot = prot_p
if prot==nil then
prot = advtrains.is_protected(pos, pname)
end
local dprot = minetest.is_protected(pos, "*dummy*")
nocheck = false
--atdebug("CTP: ",pos,pname,near,prot_p,"priv=",priv,"prot=",prot,"dprot=",dprot)
if not priv and (not boo or prot or not dprot) then
minetest.chat_send_player(pname, near and attrans("You are not allowed to build near tracks without the track_builder privilege.") or attrans("You are not allowed to build tracks without the track_builder privilege."))
minetest.log("action", pname.." tried to modify terrain "..nears.."track at "..minetest.pos_to_string(apos).." but is not permitted to (no privilege)")
return false
end
if prot then
minetest.chat_send_player(pname, near and attrans("You are not allowed to build near tracks at this protected position.") or attrans("You are not allowed to build tracks at this protected position."))
minetest.record_protection_violation(pos, pname)
minetest.log("action", pname.." tried to modify "..nears.."track at "..minetest.pos_to_string(apos).." but position is protected!")
return false
end
return true
end
--WARN: true means here that the action is allowed!
function advtrains.check_driving_couple_protection(pname, owner, whitelist)
if minetest.check_player_privs(pname, {train_admin = true}) then
return true
end
if not minetest.check_player_privs(pname, {train_operator = true}) then
return false
end
if not owner or owner == pname then
return true
end
if whitelist and string.find(" "..whitelist.." ", " "..pname.." ", nil, true) then
return true
end
return false
end
function advtrains.check_turnout_signal_protection(pos, pname)
nocheck=true
if not minetest.check_player_privs(pname, {railway_operator = true}) then
if boo and not advtrains.is_protected(pos, pname) and minetest.is_protected(pos, "*dummy*") then
nocheck=false
return true
else
minetest.chat_send_player(pname, attrans("You are not allowed to operate turnouts and signals without the railway_operator privilege."))
minetest.log("action", pname.." tried to operate turnout/signal at "..minetest.pos_to_string(pos).." but does not have railway_operator")
nocheck=false
return false
end
end
if advtrains.is_protected(pos, pname) then
minetest.record_protection_violation(pos, pname)
nocheck=false
return false
end
nocheck=false
return true
end
|
