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-- advtrains
-- protection.lua: privileges and rail protection, and some helpers
-- Privileges to control TRAIN DRIVING/COUPLING
minetest.register_privilege("train_operator", {
description = "Without this privilege, a player can't do anything about trains, neither place or remove them nor drive or couple them (but he can build tracks if he has track_builder)",
give_to_singleplayer= true,
});
minetest.register_privilege("train_admin", {
description = "Player may drive, place or remove any trains from/to anywhere, regardless of owner, whitelist or protection",
give_to_singleplayer= true,
});
-- Privileges to control TRACK BUILDING
minetest.register_privilege("track_builder", {
description = "Player can place and/or dig rails not protected from him. If he also has protection_bypass, he can place/dig any rails",
give_to_singleplayer= true,
});
-- Privileges to control OPERATING TURNOUTS/SIGNALS
minetest.register_privilege("railway_operator", {
description = "Player can operate turnouts and signals not protected from him. If he also has protection_bypass, he can operate any turnouts/signals",
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/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
]]--
local boo = minetest.settings:get_bool("advtrains_allow_build_to_owner")
local nocheck
-- Check if the node we are about to check is in the range of a track that is protected from a player
--WARN: true means here that the action is forbidden!
function advtrains.check_track_protection(pos, pname)
if nocheck or pname=="" then
return false
end
nocheck=true --prevent recursive calls, never check this again if we're already in
local r, vr = 1, 3
local nodes = minetest.find_nodes_in_area(
{x = pos.x - r, y = pos.y - vr, z = pos.z - r},
{x = pos.x + r, y = pos.y, z = pos.z + r},
{"group:advtrains_track"})
for _,npos in ipairs(nodes) do
if not minetest.check_player_privs(pname, {track_builder = true}) then
if boo and not minetest.is_protected(npos, pname) and minetest.is_protected(npos, "*dummy*") then
nocheck = false
return false
else
minetest.chat_send_player(pname, "You are not allowed to dig or place nodes near tracks (missing track_builder privilege)")
minetest.log("action", pname.." tried to dig/place nodes near the track at "..minetest.pos_to_string(npos).." but does not have track_builder")
nocheck = false
return true
end
end
if not minetest.check_player_privs(pname, {protection_bypass = true}) then
if minetest.is_protected(npos, pname) then
nocheck = false
minetest.record_protection_violation(pos, pname)
return true
end
end
end
nocheck=false
return false
end
local old_is_protected = minetest.is_protected
minetest.is_protected = function(pos, pname)
if advtrains.check_track_protection(pos, pname) then
return true
end
return old_is_protected(pos, pname)
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 minetest.is_protected(pos, pname) and minetest.is_protected(pos, "*dummy*") then
nocheck=false
return true
else
minetest.chat_send_player(pname, "You are not allowed to operate turnouts and signals (missing 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 not minetest.check_player_privs(pname, {protection_bypass = true}) then
if minetest.is_protected(pos, pname) then
minetest.record_protection_violation(pos, pname)
nocheck=false
return false
end
end
nocheck=false
return true
end
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