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diff --git a/advtrains_luaautomation/README.md b/advtrains_luaautomation/README.md
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+
+# Advtrains - Lua Automation features
+
+This mod offers components that run LUA code and interface with each other through a global environment. It makes complex automated railway systems possible. The mod is sometimes abbreviated as 'LuaATC' or 'atlatc'. This stands for AdvTrainsLuaATC. This short name has been chosen for user convenience, since the name of this mod ('advtrains_luaautomation') is very long.
+
+A probably more complete documentation of LuaATC is found on the [Advtrains Wiki](http://advtrains.de/wiki/doku.php?id=usage:atlatc:start)
+
+## Privileges
+To perform any operations using this mod (except executing operation panels), players need the "atlatc" privilege.
+This privilege should never be granted to anyone except trusted administrators. Even though the LUA environment is sandboxed, it is still possible to DoS the server by coding infinite loops or requesting expotentially growing interrupts.
+
+## Environments
+
+Each active component is assigned to an environment where all atlac data is held. Components in different environments can't inferface with each other.
+This system allows multiple independent automation systems to run simultaneously without polluting each other's environment.
+
+ - `/env_create <env_name>`:
+Create environment with the given name. To be able to do anything, you first need to create an environment. Choose the name wisely, you can't change it afterwards without deleting the environment and starting again.
+
+ - `/env_setup <env_name>`:
+Invoke the form to edit the environment's initialization code. For more information, see the section on active components. You can also delete an environment from here.
+
+ - `/env_subscribe <env_name>`, `/env_unsubscribe <env_name>`:
+Subscribe or unsubscribe from log/error messages originating from this environment
+
+ - `/env_subscriptions [env_name]`:
+List your subscriptions or players subscribed to an environment.
+
+
+## Functions and variables
+### General Functions and Variables
+The following standard Lua libraries are available:
+ - `string`
+ - `math`
+ - `table`
+ - `os`
+
+The following standard Lua functions are available:
+ - `assert`
+ - `error`
+ - `ipairs`
+ - `pairs`
+ - `next`
+ - `select`
+ - `tonumber`
+ - `tostring`
+ - `type`
+ - `unpack`
+
+Any attempt to overwrite the predefined values results in an error.
+
+### LuaAutomation Global Variables
+ - `S`
+The variable 'S' contains a table which is shared between all components of the environment. Its contents are persistent over server restarts. May not contain functions, every other value is allowed.
+
+ - `F`
+The variable 'F' also contains a table which is shared between all components of the environment. Its contents are discarded on server shutdown or when the init code gets re-run. Every data type is allowed, even functions.
+The purpose of this table is not to save data, but to provide static value and function definitions. The table should be populated by the init code.
+
+### LuaAutomation Global Functions
+> Note: in the following functions, all parameters named `pos` designate a position. You can use the following:
+> - a default Minetest position vector (eg. {x=34, y=2, z=-18})
+> - the POS(34,2,-18) shorthand below.
+> - A string, the passive component name. See 'passive component naming'.
+
+
+
+ - `POS(x,y,z)`
+Shorthand function to create a position vector {x=?, y=?, z=?} with less characters.
+
+ - `getstate(pos)`
+Get the state of the passive component at position `pos`.
+
+ - `setstate(pos, newstate)`
+Set the state of the passive component at position `pos`.
+
+ - `is_passive(pos)`
+Checks whether there is a passive component at the position pos (and/or whether a passive component with this name exists)
+
+ - `interrupt(time, message)`
+Cause LuaAutomation to trigger an `int` event on this component after the given time in seconds with the specified `message` field. `message` can be of any Lua data type. Returns true. *Not available in init code.*
+
+ - `interrupt_safe(time, message)`
+Like `interrupt()`, but does not add an interrupt and returns false when an interrupt (of any type) is already present for this component. Returns true when interrupt was successfully added.
+
+ - `interrupt_pos(pos, message)`
+Immediately trigger an `ext_int` event on the active component at position pos. `message` is like in interrupt(). Use with care, or better **_don't use_**! Incorrect use can result in **_expotential growth of interrupts_**.
+
+ - `clear_interrupts()`
+Removes any pending interrupts of this node.
+
+ - `digiline_send(channel, message)`
+Make this active component send a digiline message on the specified channel.
+Not available in init code.
+
+ - `atc_send_to_train(<train_id>, <atc_command>)`
+ Sends the specified ATC command to the train specified by its train id. This happens regardless of where the train is in the world, and can be used to remote-control trains. Returns true on success. If the train ID does not exist, returns false and does nothing. See [atc_command.txt](../atc_command.txt) for the ATC command syntax.
+
+#### Interlocking Route Management Functions
+If `advtrains_interlocking` is enabled, the following aditional functions can be used:
+
+ - `can_set_route(pos, route_name)`
+Returns whether it is possible to set the route designated by route_name from the signal at pos.
+
+ - `set_route(pos, route_name)`
+Requests the given route from the signal at pos. Has the same effect as clicking "Set Route" in the signalling dialog.
+
+ - `cancel_route(pos)`
+Cancels the route that is set from the signal at pos. Has the same effect as clicking "Cancel Route" in the signalling dialog.
+
+ - `get_aspect(pos)`
+Returns the signal aspect of the signal at pos. A signal aspect has the following format:
+```lua
+asp = {
+ main = <int speed>,
+ -- Main signal aspect, tells state and permitted speed of next section
+ -- 0 = section is blocked
+ -- >0 = section is free, speed limit is this value
+ -- -1 = section is free, maximum speed permitted
+ -- false = Signal doesn't provide main signal information, retain current speed limit.
+ shunt = <boolean>,
+ -- Whether train may proceed as shunt move, on sight
+ -- main aspect takes precedence over this
+ -- When main==0, train switches to shunt move and is restricted to speed 8
+ proceed_as_main = <boolean>,
+ -- If an approaching train is a shunt move and 'shunt' is false,
+ -- the train may proceed as a train move under the "main" aspect
+ -- if the main aspect permits it (i.e. main!=0)
+ -- If this is not set, shunt moves are NOT allowed to switch to
+ -- a train move, and must stop even if "main" would permit passing.
+ -- This is intended to be used for "Halt for shunt moves" signs.
+
+ dst = <int speed>,
+ -- Distant signal aspect, tells state and permitted speed of the section after next section
+ -- The character of these information is purely informational
+ -- At this time, this field is not actively used
+ -- 0 = section is blocked
+ -- >0 = section is free, speed limit is this value
+ -- -1 = section is free, maximum speed permitted
+ -- false = Signal doesn't provide distant signal information.
+
+ -- the character of call_on and dead_end is purely informative
+ call_on = <boolean>, -- Call-on route, expect train in track ahead (not implemented yet)
+ dead_end = <boolean>, -- Route ends on a dead end (e.g. bumper) (not implemented yet)
+
+ w_speed = <integer>,
+ -- "Warning speed restriction". Supposed for short-term speed
+ -- restrictions which always override any other restrictions
+ -- imposed by "speed" fields, until lifted by a value of -1
+ -- (Example: german Langsamfahrstellen-Signale)
+}
+```
+As of January 2020, the 'dst', 'call_on' and 'dead_end' fields are not used.
+
+#### Lines
+
+The advtrains_line_automation component adds a few contraptions that should make creating timeable systems easier.
+Part of its functionality is also available in LuaATC:
+
+- `rwt.*` - all Railway Time functions are included as documented in [the wiki](https://advtrains.de/wiki/doku.php?id=dev:lines:rwt)
+
+ - `schedule(rw_time, msg)`, `schedule_in(rw_dtime, msg)`
+Schedules an event of type {type="schedule", schedule=true, msg=msg} at (resp. after) the specified railway time (which can be in any format). You can only schedule one event this way. (uses the new lines-internal scheduler)
+
+Note: Using the lines scheduler is preferred over using `interrupt()`, as it's more performant and safer to use.
+
+## Events
+The event table is a variable created locally by the component being triggered. It is a table with the following format:
+```lua
+event = {
+ type = "<event type>",
+ <event type> = true,
+ --additional event-specific content
+}
+```
+You can check the event type by using the following:
+```lua
+if event.type == "wanted" then
+ --do stuff
+end
+```
+or
+```lua
+if event.wanted then
+ --do stuff
+end
+```
+where `wanted` is the event type to check for.
+See the "Active Components" section below for details on the various event types as not all of them are applicable to all components.
+
+## Components
+Atlac components introduce automation-capable components that fall within two categories:
+ - Active Components are components that are able to run Lua code, triggered by specific events.
+ - Passive Components can't perform actions themselves. Their state can be read and set by active components or manually by the player.
+
+### Lua ATC Rails
+Lua ATC rails are the only components that can actually interface with trains. The following event types are available to the Lua ATC rails:
+ - `{type="train", train=true, id="<train_id>"}`
+ * This event is fired when a train enters the rail. The field `id` is the unique train ID, which is 6-digit random numerical string.
+ * If the world contains trains from an older advtrains version, this string may be longer and contain a dot `.`
+
+ - `{type="int", int=true, msg=<message>}`
+ * Fired when an interrupt set by the `interrupt` function runs out. `<message>` is the message passed to the interrupt function.
+ * For backwards compatiblity reasons, `<message>` is also contained in an `event.message` variable.
+
+ - `{type="ext_int", ext_int=true, message=<message>}`
+ * Fired when another node called `interrupt_pos` on this position. `message` is the message passed to the interrupt_pos function.
+
+ - `{type="digiline", digiline=true, channel=<channel>, msg=<message>}`
+ * Fired when the controller receives a digiline message.
+
+#### Basic Lua Rail Functions and Variables
+In addition to the above environment functions, the following functions are available to whilst the train is in contact with the LuaATC rail:
+
+ - `atc_send(<atc_command>)`
+ Sends the specified ATC command to the train (a string) and returns true. If there is no train, returns false and does nothing. See [atc_command.txt](../atc_command.txt) for the ATC command syntax.
+
+ - `atc_reset()`
+ Resets the train's current ATC command. If there is no train, returns false and does nothing.
+
+ - `atc_arrow`
+ Boolean, true when the train is driving in the direction of the arrows of the ATC rail. Nil if there is no train.
+
+ - `atc_id`
+ Train ID of the train currently passing the controller. Nil if there's no train.
+
+ - `atc_speed`
+ Speed of the train, or nil if there is no train.
+
+ - `atc_set_text_outside(text)`
+ Set text shown on the outside of the train. Pass nil to show no text. `text` must be a string.
+
+ - `atc_set_text_inside(text)`
+ Set text shown to train passengers. Pass nil to show no text. `text` must be a string.
+
+ - `atc_set_text_inside(text) / atc_set_text_outside(text)`
+ Getters for inside/outside text, return nil when no train is there.
+
+ - `get_line()`
+ Returns the "Line" property of the train (a string).
+ This can be used to distinguish between trains of different lines and route them appropriately.
+ The interlocking system also uses this property for Automatic Routesetting.
+
+ - `set_line(line)`
+ Sets the "Line" property of the train (a string).
+ If the first digit of this string is a number (0-9), any subway wagons on the train (from advtrains_train_subway) will have this one displayed as line number
+ (where "0" is actually shown as Line 10 on the train)
+
+ - `get_rc()`
+ Returns the "Routingcode" property of the train (a string).
+ The interlocking system uses this property for Automatic Routesetting.
+
+ - `set_rc(routingcode)`
+ Sets the "Routingcode" property of the train (a string).
+ The interlocking system uses this property for Automatic Routesetting.
+
+#### Shunting Functions and Variables
+There are several functions available especially for shunting operations. Some of these functions make use of Freight Codes (FC) set in the Wagon Properties of each wagon and/or locomotive:
+
+ - `split_at_index(index, atc_command)`
+ Splits the train at the specified index, into a train with index-1 wagons and a second train starting with the index-th wagon. The `atc_command` specified is sent to the second train after decoupling. `"S0"` or `"B0"` is common to ensure any locomotives in the remaining train don't continue to move.
+
+ Example: train has wagons `"foo","foo","foo","bar","bar","bar"`
+ Command: `split_at_index(4,"S0")`
+ Result: first train (continues at previous speed): `"foo","foo","foo"`, second train (slows at S0): `"bar","bar","bar"`
+
+ - `split_at_fc(atc_command, len)`
+ Splits the train in such a way that all cars with non-empty current FC of the first part of the train have the same FC. The
+ `atc_command` specified is sent to the rear part, as with split_at_index. It returns the fc of the cars of the first part.
+
+ Example : Train has current FCs `"" "" "bar" "foo" "bar"`
+ Command: `split_at_fc(<atc_command>)`
+ Result: `train "" "" "bar"` and `train "foo" "bar"`
+ The function returns `"bar"` in this case.
+
+ The optional argument `len` specifies the maximum length for the
+ first part of the train.
+ Example: Train has current FCs `"foo" "foo" "foo" "foo" "bar" "bar"`
+ Command: `split_at_fc(<atc_command>,3)`
+ Result: `"foo" "foo" "foo"` and `"foo" "bar" "bar"`
+ The function returns `"foo"` in this case.
+
+ - `split_off_locomotive(command, len)`
+ Splits off the locomotives at the front of the train, which are
+ identified by an empty FC. `command` specifies the ATC command to be
+ executed by the rear half of the train. The optional argument `len` specifies the maximum length for the
+ first part of the train as above.
+
+ - `step_fc()`
+ Steps the FCs of all train cars forward. FCs are composed of codes
+ separated by exclamation marks (`!`), for instance
+ `"foo!bar!baz"`. Each wagon has a current FC, indicating its next
+ destination. Stepping the freight code forward, selects the next
+ code after the !. If the end of the string is reached, then the
+ first code is selected, except if the string ends with a question
+ mark (`?`), then the order is reversed.
+
+
+ - `train_length()`
+ returns the number of cars the train is composed of.
+
+ - `set_autocouple()`
+ Sets the train into autocouple mode. The train will couple to the next train it collides with.
+
+ - `unset_autocouple()`
+ Unsets autocouple mode
+
+Deprecated:
+
+ - `set_shunt()`, `unset_shunt()`
+ deprecated aliases for set_autocouple() and unset_autocouple(), will be removed from a later release.
+
+
+#### Interlocking
+This additional function is available when advtrains_interlocking is enabled:
+
+ - `atc_set_disable_ars(boolean)`
+ Disables (true) or enables (false) the use of ARS for this train. The train will not trigger ARS (automatic route setting) on signals then.
+
+ Note: If you want to disable ARS from an approach callback, the call to `atc_set_disable_ars(true)` *must* happen during the approach callback, and may not be deferred to an interrupt(). Else the train might trigger an ARS before the interrupt fires.
+
+#### Approach callbacks
+The LuaATC interface provides a way to hook into the approach callback system, which is for example used in the TSR rails (provided by advtrains_interlocking) or the station tracks (provided by advtrains_lines). However, for compatibility reasons, this behavior needs to be explicitly enabled.
+
+Enabling the receiving of approach events works by setting a variable in the local environment of the ATC rail, by inserting the following code:
+
+```lua
+__approach_callback_mode = 1
+-- to receive approach callbacks only in arrow direction
+-- or alternatively
+__approach_callback_mode = 2
+-- to receive approach callbacks in both directions
+```
+
+The following event will be emitted when a train approaches:
+```lua
+{type="approach", approach=true, id="<train_id>"}
+```
+
+Please note these important considerations when using approach callbacks:
+
+ - Approach events might be generated multiple times for the same approaching train. If you are using atc_set_lzb_tsr(), you need to call this function on every run of the approach callback, even if you issued it before for the same train.
+ - A reference to the train is available while executing this event, so that functions such as atc_send() or atc_set_text_outside() can be called. On any consecutive interrupts, that reference will no longer be available until the train enters the track ("train" event)
+ - Unlike all other callbacks, approach callbacks are executed synchronous during the train step. This may cause unexpected side effects when performing certain actions (such as switching turnouts, setting signals/routes) from inside such a callback. I strongly encourage you to only run things that are absolutely necessary at this point in time, and defer anything else to an interrupt(). Be aware that certain things might trigger unexpected behavior.
+
+Operations that are safe to execute in approach callbacks:
+
+ - anything related only to the global environment (setting things in S)
+ - digiline_send()
+ - atc_set_text_*()
+ - atc_set_lzb_tsr() (see below)
+
+In the context of approach callbacks, one more function is available:
+
+ - `atc_set_lzb_tsr(speed)`
+Impose a Temporary Speed Restriction at the location of this rail, making the train pass this rail at the specified speed. (Causes the same behavior as the TSR rail)
+
+#### Timetable Automation
+
+The advtrains_line_automation component adds a few contraptions that should make creating timeable systems easier.
+Part of its functionality is also available in LuaATC:
+
+- `rwt.*`
+All Railway Time functions are included as documented in https://advtrains.de/wiki/doku.php?id=dev:lines:rwt
+
+- `schedule(rw_time, msg)`
+- `schedule_in(rw_dtime, msg)`
+Schedules the following event `{type="schedule", schedule=true, msg=msg}` at (resp. after) the specified railway time (which can be in any format). You can only schedule one event this way. Uses the new lines-internal scheduler.
+
+### Operator panel
+This simple node executes its actions when punched. It can be used to change a switch and update the corresponding signals or similar applications. It can also be connected to by the`digilines` mod.
+
+The event fired is `{type="punch", punch=true}` by default. In case of an interrupt or a digiline message, the events are similar to the ones of the ATC rail.
+
+### Init code
+The initialization code is not a component as such, but rather a part of the whole environment. It can (and should) be used to make definitions that other components can refer to.
+A basic example function to define behavior for trains in stations:
+```lua
+function F.station(station_name)
+ if event.train then
+ atc_send("B0WOL")
+ atc_set_text_inside(station_name)
+ interrupt(10,"depart")
+ end
+ if event.int and event.message="depart" then
+ atc_set_text_inside("") --an empty string clears the displayed text
+ atc_send("OCD1SM")
+ end
+end
+```
+
+The corresponding Lua ATC Rail(s) would then contain the following or similar:
+```lua
+F.station("Main Station")
+```
+
+The init code is run whenever the F table needs to be refilled with data. This is the case on server startup and whenever the init code is changed and you choose to run it.
+The event table of the init code is always `{type="init", init=true}` and can not be anything else.
+Functions are run in the environment of the currently active node, regardless of where they were defined.
+
+### Passive components
+
+All passive components can be interfaced with the `setstate()` and `getstate()` functions (see above).
+Each node below has been mapped to specific "states":
+
+#### Signals
+The red/green light signals `advtrains:signal_on/off` are interfaceable. Others such as `advtrains:retrosignal_on/off` are not. If advtrains_interlocking is enabled, trains will obey the signal if the influence point is set.
+
+ - "green" - Signal shows green light
+ - "red" - Signal shows red light
+
+#### Switches/Turnouts
+All default rail switches are interfaceable, independent of orientation.
+
+ - "cr" The switch is set in the direction that is not straight.
+ - "st" The switch is set in the direction that is straight.
+
+The "Y" and "3-Way" switches have custom states. Looking from the convergence point:
+
+ - "l" The switch is set towards the left.
+ - "c" The switch is set towards the center (3-way only).
+ - "r" The switch is set towards the right.
+
+
+#### Mesecon Switch
+The Mesecon switch can be switched using LuaAutomation. Note that this is not possible on levers or protected mesecon switches, only the unprotected full-node 'Switch' block `mesecons_switch:mesecon_switch_on/off`.
+
+ - "on" - the switch is switched on.
+ - "off" - the switch is switched off.
+
+#### Andrew's Cross
+
+ - "on" - it blinks.
+ - "off" - it does not blink.
+
+#### Passive Component Naming
+You can assign names to passive components using the Passive Component Naming tool.
+Once you set a name for any component, you can reference it by that name in the `getstate()` and `setstate()` functions.
+This way, you don't need to memorize positions.
+
+Example: signal named `"Stn_P1_out"` at `(1,2,3)`
+Use `setstate("Stn_P1_out", "green")` instead of `setstate(POS(1,2,3), "green")`
+
+If `advtrains_interlocking` is enabled, PC-Naming can also be used to name interlocking signals for route setting via the `set_route()` functions.
+**Important**: The "Signal Name" field in the signalling formspec is completely independent from PC-Naming and can't be used to look up the position. You need to explicitly use the PC-Naming tool.
+
diff --git a/advtrains_luaautomation/active_common.lua b/advtrains_luaautomation/active_common.lua
new file mode 100644
index 0000000..d168bad
--- /dev/null
+++ b/advtrains_luaautomation/active_common.lua
@@ -0,0 +1,195 @@
+
+
+local ac = {nodes={}}
+
+function ac.load(data)
+ if data then
+ ac.nodes=data.nodes
+ end
+end
+function ac.save()
+ return {nodes = ac.nodes}
+end
+
+function ac.after_place_node(pos, player)
+ local meta=minetest.get_meta(pos)
+ meta:set_string("formspec", ac.getform(pos, meta))
+ meta:set_string("infotext", "LuaAutomation component, unconfigured.")
+ local ph=minetest.pos_to_string(pos)
+ --just get first available key!
+ for en,_ in pairs(atlatc.envs) do
+ ac.nodes[ph]={env=en}
+ return
+ end
+end
+function ac.getform(pos, meta_p)
+ local meta = meta_p or minetest.get_meta(pos)
+ local envs_asvalues={}
+
+ local ph=minetest.pos_to_string(pos)
+ local nodetbl = ac.nodes[ph]
+ local env, code, err = nil, "", ""
+ if nodetbl then
+ code=nodetbl.code or ""
+ err=nodetbl.err or ""
+ env=nodetbl.env or ""
+ end
+ local sel = 1
+ for n,_ in pairs(atlatc.envs) do
+ envs_asvalues[#envs_asvalues+1]=minetest.formspec_escape(n)
+ if n==env then
+ sel=#envs_asvalues
+ end
+ end
+ local form = "size[10,10]dropdown[0,0;3;env;"..table.concat(envs_asvalues, ",")..";"..sel.."]"
+ .."button[4,0;2,1;save;Save]button[7,0;2,1;cle;Clear local env] textarea[0.2,1;10,10;code;Code;"..minetest.formspec_escape(code).."]"
+ .."label[0,9.8;"..err.."]"
+ return form
+end
+
+function ac.after_dig_node(pos, node, player)
+ advtrains.invalidate_all_paths(pos)
+ advtrains.ndb.clear(pos)
+ local ph=minetest.pos_to_string(pos)
+ ac.nodes[ph]=nil
+end
+
+function ac.on_receive_fields(pos, formname, fields, player)
+ if not minetest.check_player_privs(player:get_player_name(), {atlatc=true}) then
+ minetest.chat_send_player(player:get_player_name(), "Missing privilege: atlatc - Operation cancelled!")
+ return
+ end
+
+ local meta=minetest.get_meta(pos)
+ local ph=minetest.pos_to_string(pos)
+ local nodetbl = ac.nodes[ph] or {}
+ --if fields.quit then return end
+ if fields.env then
+ nodetbl.env=fields.env
+ end
+ if fields.code then
+ nodetbl.code=fields.code
+ end
+ if fields.save then
+ -- reset certain things
+ nodetbl.err=nil
+ if advtrains.lines and advtrains.lines.sched then
+ -- discard all schedules for this node
+ advtrains.lines.sched.discard_all(advtrains.encode_pos(pos))
+ end
+ end
+ if fields.cle then
+ nodetbl.data={}
+ end
+
+ ac.nodes[ph]=nodetbl
+
+ meta:set_string("formspec", ac.getform(pos, meta))
+ if nodetbl.env then
+ meta:set_string("infotext", "LuaAutomation component, assigned to environment '"..nodetbl.env.."'")
+ else
+ meta:set_string("infotext", "LuaAutomation component, invalid enviroment set!")
+ end
+end
+
+function ac.run_in_env(pos, evtdata, customfct_p)
+ local ph=minetest.pos_to_string(pos)
+ local nodetbl = ac.nodes[ph]
+ if not nodetbl then
+ atwarn("LuaAutomation component at",ph,": Data not in memory! Please visit component and click 'Save'!")
+ return
+ end
+
+ local meta
+ if advtrains.is_node_loaded(pos) then
+ meta=minetest.get_meta(pos)
+ end
+
+ if not nodetbl.env or not atlatc.envs[nodetbl.env] then
+ atwarn("LuaAutomation component at",ph,": Not an existing environment: "..(nodetbl.env or "<nil>"))
+ return false
+ end
+ local env = atlatc.envs[nodetbl.env]
+ if not nodetbl.code or nodetbl.code=="" then
+ env:log("warning", "LuaAutomation component at",ph,": No code to run! (insert -- to suppress warning)")
+ return false
+ end
+
+ local customfct=customfct_p or {}
+ -- add interrupt function
+ customfct.interrupt=function(t, imesg)
+ assertt(t, "number")
+ assert(t >= 0)
+ atlatc.interrupt.add(t, pos, {type="int", int=true, message=imesg, msg=imesg}) --Compatiblity "message" field.
+ end
+ customfct.interrupt_safe=function(t, imesg)
+ assertt(t, "number")
+ assert(t >= 0)
+ if atlatc.interrupt.has_at_pos(pos) then
+ return false
+ end
+ atlatc.interrupt.add(t, pos, {type="int", int=true, message=imesg, msg=imesg}) --Compatiblity "message" field.
+ return true
+ end
+ customfct.clear_interrupts=function()
+ atlatc.interrupt.clear_ints_at_pos(pos)
+ end
+ -- add digiline_send function, if digiline is loaded
+ if minetest.global_exists("digiline") then
+ customfct.digiline_send=function(channel, msg)
+ assertt(channel, "string")
+ if advtrains.is_node_loaded(pos) then
+ digiline:receptor_send(pos, digiline.rules.default, channel, msg)
+ end
+ end
+ end
+ -- add lines scheduler if enabled
+ if advtrains.lines and advtrains.lines.sched then
+ customfct.schedule = function(rwtime, msg)
+ return advtrains.lines.sched.enqueue(rwtime, "atlatc_env", {pos=pos, msg=msg}, advtrains.encode_pos(pos), 1)
+ end
+ customfct.schedule_in = function(rwtime, msg)
+ return advtrains.lines.sched.enqueue_in(rwtime, "atlatc_env", {pos=pos, msg=msg}, advtrains.encode_pos(pos), 1)
+ end
+ end
+
+ local datain=nodetbl.data or {}
+ local succ, dataout = env:execute_code(datain, nodetbl.code, evtdata, customfct)
+ if succ then
+ atlatc.active.nodes[ph].data=atlatc.remove_invalid_data(dataout)
+ else
+ atlatc.active.nodes[ph].err=dataout
+ env:log("error", "LuaATC component at",ph,": LUA Error:",dataout)
+ if meta then
+ meta:set_string("infotext", "LuaATC component, ERROR:"..dataout)
+ end
+ --TODO temporary
+ --if customfct.atc_id then
+ -- advtrains.drb_dump(customfct.atc_id)
+ -- error("Debug: LuaATC error hit!")
+ --end
+ end
+ if meta then
+ meta:set_string("formspec", ac.getform(pos, meta))
+ end
+end
+
+function ac.on_digiline_receive(pos, node, channel, msg)
+ atlatc.interrupt.add(0, pos, {type="digiline", digiline=true, channel = channel, msg = msg})
+end
+
+if advtrains.lines and advtrains.lines.sched then
+ advtrains.lines.sched.register_callback("atlatc_env", function(data)
+ -- This adds another interrupt to the atlatc queue... there might be a better way
+ atlatc.interrupt.add(0, data.pos, {type="schedule",schedule=true, msg=data.msg})
+ end)
+end
+
+ac.trackdef_advtrains_defs = {
+ on_train_enter = function(pos, train_id)
+ --do async. Event is fired in train steps
+ atlatc.interrupt.add(0, pos, {type="train", train=true, id=train_id})
+ end,
+}
+
+atlatc.active=ac
diff --git a/advtrains_luaautomation/atc_rail.lua b/advtrains_luaautomation/atc_rail.lua
new file mode 100644
index 0000000..2d6efe5
--- /dev/null
+++ b/advtrains_luaautomation/atc_rail.lua
@@ -0,0 +1,247 @@
+-- atc_rail.lua
+-- registers and handles the ATC rail. Active component.
+-- This is the only component that can interface with trains, so train interface goes here too.
+
+--Using subtable
+local r={}
+
+-- Note on appr_internal:
+-- The Approach callback is a special corner case: the train is not on the node, and it is executed synchronized
+-- (in the train step right during LZB traversal). We therefore need access to the train id and the lzbdata table
+function r.fire_event(pos, evtdata, appr_internal)
+
+ local ph=minetest.pos_to_string(pos)
+ local railtbl = atlatc.active.nodes[ph]
+
+ if not railtbl then
+ atwarn("LuaAutomation ATC interface rail at",ph,": Data not in memory! Please visit position and click 'Save'!")
+ return
+ end
+
+ --prepare ingame API for ATC. Regenerate each time since pos needs to be known
+ --If no train, then return false.
+
+ -- try to get the train from the event data
+ -- This workaround is required because the callback is one step delayed, and a fast train may have already left the node.
+ -- Also used for approach callback
+ local train_id = evtdata._train_id
+ local atc_arrow = evtdata._train_arrow
+ local train, tvel
+
+ if train_id then
+ train=advtrains.trains[train_id]
+ -- speed
+ tvel=train.velocity
+ -- if still no train_id available, try to get the train at my position
+ else
+ train_id=advtrains.get_train_at_pos(pos)
+ if train_id then
+ train=advtrains.trains[train_id]
+ advtrains.train_ensure_init(train_id, train)
+ -- look up atc_arrow
+ local index = advtrains.path_lookup(train, pos)
+ atc_arrow = (train.path_cn[index] == 1)
+ -- speed
+ tvel=train.velocity
+ end
+ end
+
+ local customfct={
+ atc_send = function(cmd)
+ if not train_id then return false end
+ assertt(cmd, "string")
+ advtrains.atc.train_set_command(train, cmd, atc_arrow)
+ return true
+ end,
+ split_at_index = function(index, cmd)
+ if not train_id then return false end
+ assertt(cmd, "string")
+ if type(index) ~= "number" then
+ return false
+ end
+ local new_id = advtrains.split_train_at_index(train, index)
+ if new_id then
+ minetest.after(1,advtrains.atc.train_set_command,advtrains.trains[new_id], cmd, atc_arrow)
+ return true
+ end
+ return false
+ end,
+ split_at_fc = function(cmd, len)
+ assertt(cmd, "string")
+ if not train_id then return false end
+ local new_id, fc = advtrains.split_train_at_fc(train, false, len)
+ if new_id then
+ minetest.after(1,advtrains.atc.train_set_command,advtrains.trains[new_id], cmd, atc_arrow)
+ end
+ return fc or ""
+ end,
+ split_off_locomotive = function(cmd, len)
+ assertt(cmd, "string")
+ if not train_id then return false end
+ local new_id, fc = advtrains.split_train_at_fc(train, true, len)
+ if new_id then
+ minetest.after(1,advtrains.atc.train_set_command,advtrains.trains[new_id], cmd, atc_arrow)
+ end
+ end,
+ train_length = function ()
+ if not train_id then return false end
+ return #train.trainparts
+ end,
+ step_fc = function()
+ if not train_id then return false end
+ advtrains.train_step_fc(train)
+ end,
+ set_shunt = function()
+ -- enable shunting mode
+ if not train_id then return false end
+ train.is_shunt = true
+ end,
+ unset_shunt = function()
+ if not train_id then return false end
+ train.is_shunt = nil
+ end,
+ set_autocouple = function ()
+ if not train_id then return false end
+ train.autocouple = true
+ end,
+ unset_autocouple = function ()
+ if not train_id then return false end
+ train.autocouple = nil
+ end,
+ set_line = function(line)
+ if type(line)~="string" and type(line)~="number" then
+ return false
+ end
+ train.line = line .. ""
+ minetest.after(0, advtrains.invalidate_path, train_id)
+ return true
+ end,
+ get_line = function()
+ return train.line
+ end,
+ set_rc = function(rc)
+ if type(rc)~="string"then
+ return false
+ end
+ train.routingcode = rc
+ minetest.after(0, advtrains.invalidate_path, train_id)
+ return true
+ end,
+ get_rc = function()
+ return train.routingcode
+ end,
+ atc_reset = function(cmd)
+ if not train_id then return false end
+ assertt(cmd, "string")
+ advtrains.atc.train_reset_command(train)
+ return true
+ end,
+ atc_arrow = atc_arrow,
+ atc_id = train_id,
+ atc_speed = tvel,
+ atc_set_text_outside = function(text)
+ if not train_id then return false end
+ if text then assertt(text, "string") end
+ advtrains.trains[train_id].text_outside=text
+ return true
+ end,
+ atc_set_text_inside = function(text)
+ if not train_id then return false end
+ if text then assertt(text, "string") end
+ advtrains.trains[train_id].text_inside=text
+ return true
+ end,
+ atc_get_text_outside = function()
+ if not train_id then return false end
+ return advtrains.trains[train_id].text_outside
+ end,
+ atc_get_text_inside = function(text)
+ if not train_id then return false end
+ return advtrains.trains[train_id].text_inside
+ end,
+ atc_set_lzb_tsr = function(speed)
+ if not appr_internal then
+ error("atc_set_lzb_tsr() can only be used during 'approach' events!")
+ end
+ assert(tonumber(speed), "Number expected!")
+
+ local index = appr_internal.index
+ advtrains.lzb_add_checkpoint(train, index, speed, nil)
+
+ return true
+ end,
+ }
+ -- interlocking specific
+ if advtrains.interlocking then
+ customfct.atc_set_ars_disable = function(value)
+ advtrains.interlocking.ars_set_disable(train, value)
+ end
+ end
+
+ atlatc.active.run_in_env(pos, evtdata, customfct)
+
+end
+
+advtrains.register_tracks("default", {
+ nodename_prefix="advtrains_luaautomation:dtrack",
+ texture_prefix="advtrains_dtrack_atc",
+ models_prefix="advtrains_dtrack",
+ models_suffix=".b3d",
+ shared_texture="advtrains_dtrack_shared_atc.png",
+ description=atltrans("LuaAutomation ATC Rail"),
+ formats={},
+ get_additional_definiton = function(def, preset, suffix, rotation)
+ return {
+ after_place_node = atlatc.active.after_place_node,
+ after_dig_node = atlatc.active.after_dig_node,
+
+ on_receive_fields = function(pos, ...)
+ atlatc.active.on_receive_fields(pos, ...)
+
+ --set arrowconn (for ATC)
+ local ph=minetest.pos_to_string(pos)
+ local _, conns=advtrains.get_rail_info_at(pos, advtrains.all_tracktypes)
+ atlatc.active.nodes[ph].arrowconn=conns[1].c
+ end,
+
+ advtrains = {
+ on_train_enter = function(pos, train_id, train, index)
+ --do async. Event is fired in train steps
+ atlatc.interrupt.add(0, pos, {type="train", train=true, id=train_id,
+ _train_id = train_id, _train_arrow = (train.path_cn[index] == 1)})
+ end,
+ on_train_approach = function(pos, train_id, train, index, has_entered, lzbdata)
+ -- Insert an event only if the rail indicated that it supports approach callbacks
+ local ph=minetest.pos_to_string(pos)
+ local railtbl = atlatc.active.nodes[ph]
+ -- uses a "magic variable" in the local environment of the node
+ -- This hack is necessary because code might not be prepared to get approach events...
+ if railtbl and railtbl.data and railtbl.data.__approach_callback_mode then
+ local acm = railtbl.data.__approach_callback_mode
+ local in_arrow = (train.path_cn[index] == 1)
+ if acm==2 or (acm==1 and in_arrow) then
+ local evtdata = {type="approach", approach=true, id=train_id, has_entered = has_entered,
+ _train_id = train_id, _train_arrow = in_arrow} -- reuses code from train_enter
+ -- This event is *required* to run synchronously, because it might set the ars_disable flag on the train and add LZB checkpoints,
+ -- although this is generally discouraged because this happens right in a train step
+ -- At this moment, I am not aware whether this may cause side effects, and I must encourage users not to do expensive calculations here.
+ r.fire_event(pos, evtdata, {train_id = train_id, train = train, index = index, lzbdata = lzbdata})
+ end
+ end
+ end,
+ },
+ luaautomation = {
+ fire_event=r.fire_event
+ },
+ digiline = {
+ receptor = {},
+ effector = {
+ action = atlatc.active.on_digiline_receive
+ },
+ },
+ }
+ end,
+}, advtrains.trackpresets.t_30deg_straightonly)
+
+
+atlatc.rail = r
diff --git a/advtrains_luaautomation/chatcmds.lua b/advtrains_luaautomation/chatcmds.lua
new file mode 100644
index 0000000..468698b
--- /dev/null
+++ b/advtrains_luaautomation/chatcmds.lua
@@ -0,0 +1,150 @@
+--chatcmds.lua
+--Registers commands to modify the init and step code for LuaAutomation
+
+--position helper.
+--punching a node will result in that position being saved and inserted into a text field on the top of init form.
+local punchpos={}
+
+minetest.register_on_punchnode(function(pos, node, player, pointed_thing)
+ local pname=player:get_player_name()
+ punchpos[pname]=pos
+end)
+
+local function get_init_form(env, pname)
+ local err = env.init_err or ""
+ local code = env.init_code or ""
+ local ppos=punchpos[pname]
+ local pp=""
+ if ppos then
+ pp="POS"..minetest.pos_to_string(ppos)
+ end
+ local form = "size[10,10]button[0,0;2,1;run;Run InitCode]button[2,0;2,1;cls;Clear S]"
+ .."button[4,0;2,1;save;Save] button[6,0;2,1;del;Delete Env.] field[8.1,0.5;2,1;punchpos;Last punched position;"..pp.."]"
+ .."textarea[0.2,1;10,10;code;Environment initialization code;"..minetest.formspec_escape(code).."]"
+ .."label[0,9.8;"..err.."]"
+ return form
+end
+
+core.register_chatcommand("env_setup", {
+ params = "<environment name>",
+ description = "Set up and modify AdvTrains LuaAutomation environment",
+ privs = {atlatc=true},
+ func = function(name, param)
+ local env=atlatc.envs[param]
+ if not env then return false,"Invalid environment name!" end
+ minetest.show_formspec(name, "atlatc_envsetup_"..param, get_init_form(env, name))
+ return true
+ end,
+})
+
+core.register_chatcommand("env_create", {
+ params = "<environment name>",
+ description = "Create an AdvTrains LuaAutomation environment",
+ privs = {atlatc=true},
+ func = function(name, param)
+ if not param or param=="" then return false, "Name required!" end
+ if string.find(param, "[^a-zA-Z0-9-_]") then return false, "Invalid name (only common characters)" end
+ if atlatc.envs[param] then return false, "Environment already exists!" end
+ atlatc.envs[param] = atlatc.env_new(param)
+ atlatc.envs[param].subscribers = {name}
+ return true, "Created environment '"..param.."'. Use '/env_setup "..param.."' to define global initialization code, or start building LuaATC components!"
+ end,
+})
+core.register_chatcommand("env_subscribe", {
+ params = "<environment name>",
+ description = "Subscribe to the log of an Advtrains LuaATC environment",
+ privs = {atlatc=true},
+ func = function(name, param)
+ local env=atlatc.envs[param]
+ if not env then return false,"Invalid environment name!" end
+ for _,pname in ipairs(env.subscribers) do
+ if pname==name then
+ return false, "Already subscribed!"
+ end
+ end
+ table.insert(env.subscribers, name)
+ return true, "Subscribed to environment '"..param.."'."
+ end,
+})
+core.register_chatcommand("env_unsubscribe", {
+ params = "<environment name>",
+ description = "Unubscribe to the log of an Advtrains LuaATC environment",
+ privs = {atlatc=true},
+ func = function(name, param)
+ local env=atlatc.envs[param]
+ if not env then return false,"Invalid environment name!" end
+ for index,pname in ipairs(env.subscribers) do
+ if pname==name then
+ table.remove(env.subscribers, index)
+ return true, "Successfully unsubscribed!"
+ end
+ end
+ return false, "Not subscribed to environment '"..param.."'."
+ end,
+})
+core.register_chatcommand("env_subscriptions", {
+ params = "[environment name]",
+ description = "List Advtrains LuaATC environments you are subscribed to (no parameters) or subscribers of an environment (giving an env name).",
+ privs = {atlatc=true},
+ func = function(name, param)
+ if not param or param=="" then
+ local none=true
+ for envname, env in pairs(atlatc.envs) do
+ for _,pname in ipairs(env.subscribers) do
+ if pname==name then
+ none=false
+ minetest.chat_send_player(name, envname)
+ end
+ end
+ end
+ if none then
+ return false, "Not subscribed to any!"
+ end
+ return true
+ end
+ local env=atlatc.envs[param]
+ if not env then return false,"Invalid environment name!" end
+ local none=true
+ for index,pname in ipairs(env.subscribers) do
+ none=false
+ minetest.chat_send_player(name, pname)
+ end
+ if none then
+ return false, "No subscribers!"
+ end
+ return true
+ end,
+})
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+
+ local pname=player:get_player_name()
+ if not minetest.check_player_privs(pname, {atlatc=true}) then return end
+
+ local envname=string.match(formname, "^atlatc_delconfirm_(.+)$")
+ if envname and fields.sure=="YES" then
+ atlatc.envs[envname]=nil
+ minetest.chat_send_player(pname, "Environment deleted!")
+ return
+ end
+
+ envname=string.match(formname, "^atlatc_envsetup_(.+)$")
+ if not envname then return end
+
+ local env=atlatc.envs[envname]
+ if not env then return end
+
+ if fields.del then
+ minetest.show_formspec(pname, "atlatc_delconfirm_"..envname, "field[sure;"..minetest.formspec_escape("SURE TO DELETE ENVIRONMENT "..envname.."? Type YES (all uppercase) to continue or just quit form to cancel.")..";]")
+ return
+ end
+
+ env.init_err=nil
+ if fields.code then
+ env.init_code=fields.code
+ end
+ if fields.run then
+ env:run_initcode()
+ minetest.show_formspec(pname, formname, get_init_form(env, pname))
+ end
+end)
diff --git a/advtrains_luaautomation/environment.lua b/advtrains_luaautomation/environment.lua
new file mode 100644
index 0000000..63aa68d
--- /dev/null
+++ b/advtrains_luaautomation/environment.lua
@@ -0,0 +1,372 @@
+-------------
+-- lua sandboxed environment
+
+-- function to cross out functions and userdata.
+-- modified from dump()
+function atlatc.remove_invalid_data(o, nested)
+ if o==nil then return nil end
+ local valid_dt={["nil"]=true, boolean=true, number=true, string=true}
+ if type(o) ~= "table" then
+ --check valid data type
+ if not valid_dt[type(o)] then
+ return nil
+ end
+ return o
+ end
+ -- Contains table -> true/nil of currently nested tables
+ nested = nested or {}
+ if nested[o] then
+ return nil
+ end
+ nested[o] = true
+ for k, v in pairs(o) do
+ v = atlatc.remove_invalid_data(v, nested)
+ end
+ nested[o] = nil
+ return o
+end
+
+
+local env_proto={
+ load = function(self, envname, data)
+ self.name=envname
+ self.sdata=data.sdata and atlatc.remove_invalid_data(data.sdata) or {}
+ self.fdata={}
+ self.init_code=data.init_code or ""
+ self.subscribers=data.subscribers or {}
+ end,
+ save = function(self)
+ -- throw any function values out of the sdata table
+ self.sdata = atlatc.remove_invalid_data(self.sdata)
+ return {sdata = self.sdata, init_code=self.init_code, subscribers=self.subscribers}
+ end,
+}
+
+--Environment
+--Code modified from mesecons_luacontroller (credit goes to Jeija and mesecons contributors)
+
+local safe_globals = {
+ "assert", "error", "ipairs", "next", "pairs", "select",
+ "tonumber", "tostring", "type", "unpack", "_VERSION"
+}
+
+local function safe_date(f, t)
+ if not f then
+ -- fall back to old behavior
+ return(os.date("*t",os.time()))
+ else
+ --pass parameters
+ return os.date(f,t)
+ end
+end
+
+-- string.rep(str, n) with a high value for n can be used to DoS
+-- the server. Therefore, limit max. length of generated string.
+local function safe_string_rep(str, n)
+ if #str * n > 2000 then
+ debug.sethook() -- Clear hook
+ error("string.rep: string length overflow", 2)
+ end
+
+ return string.rep(str, n)
+end
+
+-- string.find with a pattern can be used to DoS the server.
+-- Therefore, limit string.find to patternless matching.
+-- Note: Disabled security since there are enough security leaks and this would be unneccessary anyway to DoS the server
+local function safe_string_find(...)
+ --if (select(4, ...)) ~= true then
+ -- debug.sethook() -- Clear hook
+ -- error("string.find: 'plain' (fourth parameter) must always be true for security reasons.")
+ --end
+
+ return string.find(...)
+end
+
+local mp=minetest.get_modpath("advtrains_luaautomation")
+
+local static_env = {
+ --core LUA functions
+ string = {
+ byte = string.byte,
+ char = string.char,
+ format = string.format,
+ len = string.len,
+ lower = string.lower,
+ upper = string.upper,
+ rep = safe_string_rep,
+ reverse = string.reverse,
+ sub = string.sub,
+ find = safe_string_find,
+ },
+ math = {
+ abs = math.abs,
+ acos = math.acos,
+ asin = math.asin,
+ atan = math.atan,
+ atan2 = math.atan2,
+ ceil = math.ceil,
+ cos = math.cos,
+ cosh = math.cosh,
+ deg = math.deg,
+ exp = math.exp,
+ floor = math.floor,
+ fmod = math.fmod,
+ frexp = math.frexp,
+ huge = math.huge,
+ ldexp = math.ldexp,
+ log = math.log,
+ log10 = math.log10,
+ max = math.max,
+ min = math.min,
+ modf = math.modf,
+ pi = math.pi,
+ pow = math.pow,
+ rad = math.rad,
+ random = math.random,
+ sin = math.sin,
+ sinh = math.sinh,
+ sqrt = math.sqrt,
+ tan = math.tan,
+ tanh = math.tanh,
+ },
+ table = {
+ concat = table.concat,
+ insert = table.insert,
+ maxn = table.maxn,
+ remove = table.remove,
+ sort = table.sort,
+ },
+ os = {
+ clock = os.clock,
+ difftime = os.difftime,
+ time = os.time,
+ date = safe_date,
+ },
+ POS = function(x,y,z) return {x=x, y=y, z=z} end,
+ getstate = advtrains.getstate,
+ setstate = advtrains.setstate,
+ is_passive = advtrains.is_passive,
+ --interrupts are handled per node, position unknown. (same goes for digilines)
+ --however external interrupts can be set here.
+ interrupt_pos = function(parpos, imesg)
+ local pos=atlatc.pcnaming.resolve_pos(parpos)
+ atlatc.interrupt.add(0, pos, {type="ext_int", ext_int=true, message=imesg})
+ end,
+ -- sends an atc command to train regardless of where it is in the world
+ atc_send_to_train = function(train_id, command)
+ assertt(command, "string")
+ local train = advtrains.trains[train_id]
+ if train then
+ advtrains.atc.train_set_command(train, command, true)
+ return true
+ else
+ return false
+ end
+ end,
+}
+
+-- If interlocking is present, enable route setting functions
+if advtrains.interlocking then
+ local function gen_checks(signal, route_name, noroutesearch)
+ assertt(route_name, "string")
+ local pos = atlatc.pcnaming.resolve_pos(signal)
+ local sigd = advtrains.interlocking.db.get_sigd_for_signal(pos)
+ if not sigd then
+ error("There's no signal at "..minetest.pos_to_string(pos))
+ end
+ local tcbs = advtrains.interlocking.db.get_tcbs(sigd)
+ if not tcbs then
+ error("Inconsistent configuration, no tcbs for signal at "..minetest.pos_to_string(pos))
+ end
+
+ local routeid, route
+ if not noroutesearch then
+ for routeidt, routet in ipairs(tcbs.routes) do
+ if routet.name == route_name then
+ routeid = routeidt
+ route = routet
+ break
+ end
+ end
+ if not route then
+ error("No route called "..route_name.." at "..minetest.pos_to_string(pos))
+ end
+ end
+ return pos, sigd, tcbs, routeid, route
+ end
+
+
+ static_env.can_set_route = function(signal, route_name)
+ local pos, sigd, tcbs, routeid, route = gen_checks(signal, route_name)
+ -- if route is already set on signal, return whether it's committed
+ if tcbs.routeset == routeid then
+ return tcbs.route_committed
+ end
+ -- actually try setting route (parameter 'true' designates try-run
+ local ok = advtrains.interlocking.route.set_route(sigd, route, true)
+ return ok
+ end
+ static_env.set_route = function(signal, route_name)
+ local pos, sigd, tcbs, routeid, route = gen_checks(signal, route_name)
+ return advtrains.interlocking.route.update_route(sigd, tcbs, routeid)
+ end
+ static_env.cancel_route = function(signal)
+ local pos, sigd, tcbs, routeid, route = gen_checks(signal, "", true)
+ return advtrains.interlocking.route.update_route(sigd, tcbs, nil, true)
+ end
+ static_env.get_aspect = function(signal)
+ local pos = atlatc.pcnaming.resolve_pos(signal)
+ return advtrains.interlocking.signal_get_aspect(pos)
+ end
+ static_env.set_aspect = function(signal, asp)
+ local pos = atlatc.pcnaming.resolve_pos(signal)
+ return advtrains.interlocking.signal_set_aspect(pos)
+ end
+end
+
+-- Lines-specific:
+if advtrains.lines then
+ local atlrwt = advtrains.lines.rwt
+ static_env.rwt = {
+ now = atlrwt.now,
+ new = atlrwt.new,
+ copy = atlrwt.copy,
+ to_table = atlrwt.to_table,
+ to_secs = atlrwt.to_secs,
+ to_string = atlrwt.to_string,
+ add = atlrwt.add,
+ diff = atlrwt.diff,
+ sub = atlrwt.sub,
+ adj_diff = atlrwt.adj_diff,
+ adjust_cycle = atlrwt.adjust_cycle,
+ adjust = atlrwt.adjust,
+ to_string = atlrwt.to_string,
+ get_time_until = atlrwt.get_time_until,
+ next_rpt = atlrwt.next_rpt,
+ last_rpt = atlrwt.last_rpt,
+ time_from_last_rpt = atlrwt.time_from_last_rpt,
+ time_to_next_rpt = atlrwt.time_to_next_rpt,
+ }
+end
+
+for _, name in pairs(safe_globals) do
+ static_env[name] = _G[name]
+end
+
+--The environment all code calls get is a table that has set static_env as metatable.
+--In general, every variable is local to a single code chunk, but kept persistent over code re-runs. Data is also saved, but functions and userdata and circular references are removed
+--Init code and step code's environments are not saved
+-- S - Table that can contain any save data global to the environment. Will be saved statically. Can't contain functions or userdata or circular references.
+-- F - Table global to the environment, can contain volatile data that is deleted when server quits.
+-- The init code should populate this table with functions and other definitions.
+
+local proxy_env={}
+--proxy_env gets a new metatable in every run, but is the shared environment of all functions ever defined.
+
+-- returns: true, fenv if successful; nil, error if error
+function env_proto:execute_code(localenv, code, evtdata, customfct)
+ -- create us a print function specific for this environment
+ if not self.safe_print_func then
+ local myenv = self
+ self.safe_print_func = function(...)
+ myenv:log("info", ...)
+ end
+ end
+
+ local metatbl ={
+ __index = function(t, i)
+ if i=="S" then
+ return self.sdata
+ elseif i=="F" then
+ return self.fdata
+ elseif i=="event" then
+ return evtdata
+ elseif customfct and customfct[i] then
+ return customfct[i]
+ elseif localenv and localenv[i] then
+ return localenv[i]
+ elseif i=="print" then
+ return self.safe_print_func
+ end
+ return static_env[i]
+ end,
+ __newindex = function(t, i, v)
+ if i=="S" or i=="F" or i=="event" or (customfct and customfct[i]) or static_env[i] then
+ debug.sethook()
+ error("Trying to overwrite environment contents")
+ end
+ localenv[i]=v
+ end,
+ }
+ setmetatable(proxy_env, metatbl)
+ local fun, err=loadstring(code)
+ if not fun then
+ return false, err
+ end
+
+ setfenv(fun, proxy_env)
+ local succ, data = pcall(fun)
+ if succ then
+ data=localenv
+ end
+ return succ, data
+end
+
+function env_proto:run_initcode()
+ if self.init_code and self.init_code~="" then
+ local old_fdata=self.fdata
+ self.fdata = {}
+ --atprint("[atlatc]Running initialization code for environment '"..self.name.."'")
+ local succ, err = self:execute_code({}, self.init_code, {type="init", init=true})
+ if not succ then
+ self:log("error", "Executing InitCode for '"..self.name.."' failed:"..err)
+ self.init_err=err
+ if old_fdata then
+ self.fdata=old_fdata
+ self:log("warning", "The 'F' table has been restored to the previous state.")
+ end
+ end
+ end
+end
+
+-- log to environment subscribers. severity can be "error", "warning" or "info" (used by internal print)
+function env_proto:log(severity, ...)
+ local text=advtrains.print_concat_table({"[atlatc "..self.name.." "..severity.."]", ...})
+ minetest.log("action", text)
+ for _, pname in ipairs(self.subscribers) do
+ minetest.chat_send_player(pname, text)
+ end
+end
+
+-- env.subscribers table may be directly altered by callers.
+
+
+--- class interface
+
+function atlatc.env_new(name)
+ local newenv={
+ name=name,
+ init_code="",
+ sdata={},
+ subscribers={},
+ }
+ setmetatable(newenv, {__index=env_proto})
+ return newenv
+end
+function atlatc.env_load(name, data)
+ local newenv={}
+ setmetatable(newenv, {__index=env_proto})
+ newenv:load(name, data)
+ return newenv
+end
+
+function atlatc.run_initcode()
+ for envname, env in pairs(atlatc.envs) do
+ env:run_initcode()
+ end
+end
+
+
+
+
diff --git a/advtrains_luaautomation/init.lua b/advtrains_luaautomation/init.lua
new file mode 100644
index 0000000..a54fb25
--- /dev/null
+++ b/advtrains_luaautomation/init.lua
@@ -0,0 +1,113 @@
+-- advtrains_luaautomation/init.lua
+-- Lua automation features for advtrains
+-- Uses global table 'atlatc' (AdvTrains_LuaATC)
+
+-- Boilerplate to support localized strings if intllib mod is installed.
+if intllib then
+ atltrans = intllib.Getter()
+else
+ atltrans = function(s,a,...)a={a,...}return s:gsub("@(%d+)",function(n)return a[tonumber(n)]end)end
+end
+
+--Privilege
+--Only trusted players should be enabled to build stuff which can break the server.
+
+atlatc = { envs = {}}
+
+minetest.register_privilege("atlatc", { description = "Player can place and modify LUA ATC components. Grant with care! Allows to execute bad LUA code.", give_to_singleplayer = false, default= false })
+
+--assertt helper. error if a variable is not of a type
+function assertt(var, typ)
+ if type(var)~=typ then
+ error("Assertion failed, variable has to be of type "..typ)
+ end
+end
+
+local mp=minetest.get_modpath("advtrains_luaautomation")
+if not mp then
+ error("Mod name error: Mod folder is not named 'advtrains_luaautomation'!")
+end
+dofile(mp.."/environment.lua")
+dofile(mp.."/interrupt.lua")
+dofile(mp.."/active_common.lua")
+dofile(mp.."/atc_rail.lua")
+dofile(mp.."/operation_panel.lua")
+dofile(mp.."/pcnaming.lua")
+
+dofile(mp.."/chatcmds.lua")
+
+
+local filename=minetest.get_worldpath().."/advtrains_luaautomation"
+
+function atlatc.load(tbl)
+ if tbl.version==1 then
+ for envname, data in pairs(tbl.envs) do
+ atlatc.envs[envname]=atlatc.env_load(envname, data)
+ end
+ atlatc.active.load(tbl.active)
+ atlatc.interrupt.load(tbl.interrupt)
+ atlatc.pcnaming.load(tbl.pcnaming)
+ end
+ -- run init code of all environments
+ atlatc.run_initcode()
+end
+
+function atlatc.load_pre_v4()
+ minetest.log("action", "[atlatc] Loading pre-v4 save file")
+ local file, err = io.open(filename, "r")
+ if not file then
+ minetest.log("warning", " Failed to read advtrains_luaautomation save data from file "..filename..": "..(err or "Unknown Error"))
+ minetest.log("warning", " (this is normal when first enabling advtrains on this world)")
+ else
+ atprint("luaautomation reading file:",filename)
+ local tbl = minetest.deserialize(file:read("*a"))
+ if type(tbl) == "table" then
+ if tbl.version==1 then
+ for envname, data in pairs(tbl.envs) do
+ atlatc.envs[envname]=atlatc.env_load(envname, data)
+ end
+ atlatc.active.load(tbl.active)
+ atlatc.interrupt.load(tbl.interrupt)
+ atlatc.pcnaming.load(tbl.pcnaming)
+ end
+ else
+ minetest.log("error", " Failed to read advtrains_luaautomation save data from file "..filename..": Not a table!")
+ end
+ file:close()
+ end
+ -- run init code of all environments
+ atlatc.run_initcode()
+end
+
+
+atlatc.save = function()
+ --versions:
+ -- 1 - Initial save format.
+
+ local envdata={}
+ for envname, env in pairs(atlatc.envs) do
+ envdata[envname]=env:save()
+ end
+ local save_tbl={
+ version = 1,
+ envs=envdata,
+ active = atlatc.active.save(),
+ interrupt = atlatc.interrupt.save(),
+ pcnaming = atlatc.pcnaming.save(),
+ }
+
+ return save_tbl
+end
+
+--[[
+-- globalstep for step code
+local timer, step_int=0, 2
+
+function atlatc.mainloop_stepcode(dtime)
+ timer=timer+dtime
+ if timer>step_int then
+ timer=0
+ atlatc.run_stepcode()
+ end
+end
+]]
diff --git a/advtrains_luaautomation/interrupt.lua b/advtrains_luaautomation/interrupt.lua
new file mode 100644
index 0000000..2e54ad8
--- /dev/null
+++ b/advtrains_luaautomation/interrupt.lua
@@ -0,0 +1,73 @@
+-- interrupt.lua
+-- implements interrupt queue
+
+--to be saved: pos and evtdata
+local iq={}
+local queue={}
+local timer=0
+local run=false
+
+function iq.load(data)
+ local d=data or {}
+ queue = d.queue or {}
+ timer = d.timer or 0
+end
+function iq.save()
+ return {queue = queue, timer=timer}
+end
+
+function iq.has_at_pos(pos)
+ for i=1,#queue do
+ local qe=queue[i]
+ if vector.equals(pos, qe.p) then
+ return true
+ end
+ end
+ return false
+end
+
+function iq.clear_ints_at_pos(pos)
+ local i=1
+ while i<=#queue do
+ local qe=queue[i]
+ if not qe then
+ table.remove(queue, i)
+ elseif vector.equals(pos, qe.p) and (qe.e.int or qe.e.ext_int) then
+ table.remove(queue, i)
+ else
+ i=i+1
+ end
+ end
+end
+
+function iq.add(t, pos, evtdata)
+ queue[#queue+1]={t=t+timer, p=pos, e=evtdata}
+ run=true
+end
+
+function iq.mainloop(dtime)
+ timer=timer + math.min(dtime, 0.2)
+ local i=1
+ while i<=#queue do
+ local qe=queue[i]
+ if not qe then
+ table.remove(queue, i)
+ elseif timer>qe.t then
+ table.remove(queue, i)
+ local pos, evtdata=qe.p, qe.e
+ local node=advtrains.ndb.get_node(pos)
+ local ndef=minetest.registered_nodes[node.name]
+ if ndef and ndef.luaautomation and ndef.luaautomation.fire_event then
+ ndef.luaautomation.fire_event(pos, evtdata)
+ else
+ atwarn("[atlatc][interrupt] Couldn't run event",evtdata.type,"on",pos,", something wrong with the node",node)
+ end
+ else
+ i=i+1
+ end
+ end
+end
+
+
+
+atlatc.interrupt=iq
diff --git a/advtrains_luaautomation/mod.conf b/advtrains_luaautomation/mod.conf
new file mode 100644
index 0000000..a737603
--- /dev/null
+++ b/advtrains_luaautomation/mod.conf
@@ -0,0 +1,7 @@
+name=advtrains_luaautomation
+title=Advanced Trains LuaATC
+description=Lua control interface to Advanced Trains
+author=orwell96
+
+depends=advtrains
+optional_depends=advtrains_interlocking,advtrains_line_automation,mesecons_switch
diff --git a/advtrains_luaautomation/operation_panel.lua b/advtrains_luaautomation/operation_panel.lua
new file mode 100644
index 0000000..f8b93b5
--- /dev/null
+++ b/advtrains_luaautomation/operation_panel.lua
@@ -0,0 +1,28 @@
+
+local function on_punch(pos, player)
+ atlatc.interrupt.add(0, pos, {type="punch", punch=true})
+end
+
+
+minetest.register_node("advtrains_luaautomation:oppanel", {
+ drawtype = "normal",
+ tiles={"atlatc_oppanel.png"},
+ description = "LuaAutomation operation panel",
+ groups = {
+ cracky = 1,
+ save_in_at_nodedb=1,
+ },
+ after_place_node = atlatc.active.after_place_node,
+ after_dig_node = atlatc.active.after_dig_node,
+ on_receive_fields = atlatc.active.on_receive_fields,
+ on_punch = on_punch,
+ luaautomation = {
+ fire_event=atlatc.active.run_in_env
+ },
+ digiline = {
+ receptor = {},
+ effector = {
+ action = atlatc.active.on_digiline_receive
+ },
+ },
+})
diff --git a/advtrains_luaautomation/p_display.lua b/advtrains_luaautomation/p_display.lua
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/advtrains_luaautomation/p_display.lua
diff --git a/advtrains_luaautomation/passive_api.txt b/advtrains_luaautomation/passive_api.txt
new file mode 100644
index 0000000..5ae1df4
--- /dev/null
+++ b/advtrains_luaautomation/passive_api.txt
@@ -0,0 +1,24 @@
+Lua Automation - Passive Component API
+
+Passive components are nodes that do not have code running in them. However, active components can query these and request actions from them. Examples:
+Switches
+Signals
+Displays
+Mesecon Transmitter
+Those passive components can also be used inside interlocking systems.
+
+All passive components have a table called 'advtrains' in their node definition and have the group 'save_in_at_nodedb' set, so they work in unloaded chunks.
+Example for a switch:
+advtrains = {
+ getstate = function(pos, node)
+ return "st"
+ end,
+ -- OR
+ getstate = "st",
+
+ setstate = function(pos, node, newstate)
+ if newstate=="cr" then
+ advtrains.ndb.swap_node(pos, <corresponding switch alt>)
+ end
+ end
+} \ No newline at end of file
diff --git a/advtrains_luaautomation/pcnaming.lua b/advtrains_luaautomation/pcnaming.lua
new file mode 100644
index 0000000..ebb769f
--- /dev/null
+++ b/advtrains_luaautomation/pcnaming.lua
@@ -0,0 +1,76 @@
+--pcnaming.lua
+--a.k.a Passive component naming
+--Allows to assign names to passive components, so they can be called like:
+--setstate("iamasignal", "green")
+atlatc.pcnaming={name_map={}}
+function atlatc.pcnaming.load(stuff)
+ if type(stuff)=="table" then
+ atlatc.pcnaming.name_map=stuff
+ end
+end
+function atlatc.pcnaming.save()
+ return atlatc.pcnaming.name_map
+end
+
+function atlatc.pcnaming.resolve_pos(pos, func_name)
+ if type(pos)=="string" then
+ local e = atlatc.pcnaming.name_map[pos]
+ if e then return e end
+ elseif type(pos)=="table" and pos.x and pos.y and pos.z then
+ return pos
+ end
+ error("Invalid position supplied to " .. (func_name or "???")..": " .. dump(pos))
+end
+
+minetest.register_craftitem("advtrains_luaautomation:pcnaming",{
+ description = attrans("Passive Component Naming Tool\n\nRight-click to name a passive component."),
+ groups = {cracky=1}, -- key=name, value=rating; rating=1..3.
+ inventory_image = "atlatc_pcnaming.png",
+ wield_image = "atlatc_pcnaming.png",
+ stack_max = 1,
+ on_place = function(itemstack, placer, pointed_thing)
+ local pname = placer:get_player_name()
+ if not pname then
+ return
+ end
+ if not minetest.check_player_privs(pname, {atlatc=true}) then
+ minetest.chat_send_player(pname, "Missing privilege: atlatc")
+ return
+ end
+ if pointed_thing.type=="node" then
+ local pos=pointed_thing.under
+ if advtrains.is_protected(pos, pname) then
+ minetest.record_protection_violation(pos, pname)
+ return
+ end
+ local node = advtrains.ndb.get_node(pos)
+ if node.name and (minetest.get_item_group(node.name, "advtrains_signal")>0 or advtrains.is_passive(pos)) then
+ --look if this one already has a name
+ local pn=""
+ for name, npos in pairs(atlatc.pcnaming.name_map) do
+ if vector.equals(npos, pos) then
+ pn=name
+ end
+ end
+ minetest.show_formspec(pname, "atlatc_naming_"..minetest.pos_to_string(pos), "field[pn;Set name of component (empty to clear);"..minetest.formspec_escape(pn).."]")
+ end
+ end
+ end,
+})
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+ local pts=string.match(formname, "^atlatc_naming_(.+)")
+ if pts then
+ local pos=minetest.string_to_pos(pts)
+ if fields.pn then
+ --first remove all occurences
+ for name, npos in pairs(atlatc.pcnaming.name_map) do
+ if vector.equals(npos, pos) then
+ atlatc.pcnaming.name_map[name]=nil
+ end
+ end
+ if fields.pn~="" then
+ atlatc.pcnaming.name_map[fields.pn]=pos
+ end
+ end
+ end
+end)
diff --git a/advtrains_luaautomation/textures/atlatc_oppanel.png b/advtrains_luaautomation/textures/atlatc_oppanel.png
new file mode 100644
index 0000000..96eb30e
--- /dev/null
+++ b/advtrains_luaautomation/textures/atlatc_oppanel.png
Binary files differ
diff --git a/advtrains_luaautomation/textures/atlatc_pcnaming.png b/advtrains_luaautomation/textures/atlatc_pcnaming.png
new file mode 100644
index 0000000..3fccdfc
--- /dev/null
+++ b/advtrains_luaautomation/textures/atlatc_pcnaming.png
Binary files differ
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 05:32:51 +0000