aboutsummaryrefslogtreecommitdiff
path: root/advtrains/atc.lua
blob: 8cb3e8f4d796949a80c2e87d96953f422f433e36 (plain)
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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
--atc.lua
--registers and controls the ATC system

local atc={}

local eval_conditional

-- ATC persistence table. advtrains.atc is created by init.lua when it loads the save file.
atc.controllers = {}
function atc.load_data(data)
	local temp = data and data.controllers or {}
	--transcode atc controller data to node hashes: table access times for numbers are far less than for strings
	for pts, data in pairs(temp) do
		if type(pts)=="number" then
			pts=minetest.pos_to_string(minetest.get_position_from_hash(pts))
		end
		atc.controllers[pts] = data
	end
end
function atc.save_data()
	return {controllers = atc.controllers}
end
--contents: {command="...", arrowconn=0-15 where arrow points}

--general
function atc.train_set_command(train, command, arrow)
	atc.train_reset_command(train, true)
	train.atc_delay = 0
	train.atc_arrow = arrow
	train.atc_command = command
end

function atc.send_command(pos, par_tid)
	local pts=minetest.pos_to_string(pos)
	if atc.controllers[pts] then
		--atprint("Called send_command at "..pts)
		local train_id = par_tid or advtrains.get_train_at_pos(pos)
		if train_id then
			if advtrains.trains[train_id] then
				--atprint("send_command inside if: "..sid(train_id))
				if atc.controllers[pts].arrowconn then
					atlog("ATC controller at",pts,": This controller had an arrowconn of", atc.controllers[pts].arrowconn, "set. Since this field is now deprecated, it was removed.")
					atc.controllers[pts].arrowconn = nil
				end
				
				local train = advtrains.trains[train_id]
				local index = advtrains.path_lookup(train, pos)
				
				local iconnid = 1
				if index then
					iconnid = train.path_cn[index]
				else
					atwarn("ATC rail at", pos, ": Rail not on train's path! Can't determine arrow direction. Assuming +!")
				end
				
				local command = atc.controllers[pts].command				
				command = eval_conditional(command, iconnid==1, train.velocity)
				if not command then command="" end
				command=string.match(command, "^%s*(.*)$")
				
				if command == "" then
					atprint("Sending ATC Command to", train_id, ": Not modifying, conditional evaluated empty.")
					return true
				end
				
				atc.train_set_command(train, command, iconnid==1)
				atprint("Sending ATC Command to", train_id, ":", command, "iconnid=",iconnid)
				return true
				
			else
				atwarn("ATC rail at", pos, ": Sending command failed: The train",train_id,"does not exist. This seems to be a bug.")
			end
		else
			atwarn("ATC rail at", pos, ": Sending command failed: There's no train at this position. This seems to be a bug.")
			-- huch
			--local train = advtrains.trains[train_id_temp_debug]
			--atlog("Train speed is",train.velocity,", have moved",train.dist_moved_this_step,", lever",train.lever)
			--advtrains.path_print(train, atlog)
			-- TODO track again when ATC bugs occur...
			
		end
	else
		atwarn("ATC rail at", pos, ": Sending command failed: Entry for controller not found.")
		atwarn("ATC rail at", pos, ": Please visit controller and click 'Save'")
	end
	return false
end

-- Resets any ATC commands the train is currently executing, including the target speed (tarvelocity) it is instructed to hold
-- if keep_tarvel is set, does not clear the tarvelocity
function atc.train_reset_command(train, keep_tarvel)
	train.atc_command=nil
	train.atc_delay=nil
	train.atc_brake_target=nil
	train.atc_wait_finish=nil
	train.atc_arrow=nil
	if not keep_tarvel then
		train.tarvelocity=nil
	end
end

--nodes
local idxtrans={static=1, mesecon=2, digiline=3}
local apn_func=function(pos)
	-- FIX for long-persisting ndb bug: there's no node in parameter 2 of this function!
	local meta=minetest.get_meta(pos)
	if meta then
		meta:set_string("infotext", attrans("ATC controller, unconfigured."))
		meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
	end
end

advtrains.atc_function = function(def, preset, suffix, rotation)
		return {
			after_place_node=apn_func,
			after_dig_node=function(pos)
				advtrains.invalidate_all_paths(pos)
				advtrains.ndb.clear(pos)
				local pts=minetest.pos_to_string(pos)
				atc.controllers[pts]=nil
			end,
			on_receive_fields = function(pos, formname, fields, player)
				if advtrains.is_protected(pos, player:get_player_name()) then
					minetest.record_protection_violation(pos, player:get_player_name())
					return
				end
				local meta=minetest.get_meta(pos)
				if meta then
					if not fields.save then 
						--[[--maybe only the dropdown changed
						if fields.mode then
							meta:set_string("mode", idxtrans[fields.mode])
							if fields.mode=="digiline" then
								meta:set_string("infotext", attrans("ATC controller, mode @1\nChannel: @2", fields.mode, meta:get_string("command")) )
							else
								meta:set_string("infotext", attrans("ATC controller, mode @1\nCommand: @2", fields.mode, meta:get_string("command")) )
							end
							meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
						end]]--
						return
					end
					--meta:set_string("mode", idxtrans[fields.mode])
					meta:set_string("command", fields.command)
					--meta:set_string("command_on", fields.command_on)
					meta:set_string("channel", fields.channel)
					--if fields.mode=="digiline" then
					--	meta:set_string("infotext", attrans("ATC controller, mode @1\nChannel: @2", fields.mode, meta:get_string("command")) )
					--else
					meta:set_string("infotext", attrans("ATC controller, mode @1\nCommand: @2", "-", meta:get_string("command")) )
					--end
					meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
					
					local pts=minetest.pos_to_string(pos)
					local _, conns=advtrains.get_rail_info_at(pos, advtrains.all_tracktypes)
					atc.controllers[pts]={command=fields.command}
					if #advtrains.occ.get_trains_at(pos) > 0 then
						atc.send_command(pos)
					end
				end
			end,
			advtrains = {
				on_train_enter = function(pos, train_id)
					atc.send_command(pos, train_id)
				end,
			},
		}
end

function atc.get_atc_controller_formspec(pos, meta)
	local mode=tonumber(meta:get_string("mode")) or 1
	local command=meta:get_string("command")
	local command_on=meta:get_string("command_on")
	local channel=meta:get_string("channel")
	local formspec="size[8,6]"
	--	"dropdown[0,0;3;mode;static,mesecon,digiline;"..mode.."]"
	if mode<3 then
		formspec=formspec
			.."style[command;font=mono]"
			.."field[0.8,1.5;7,1;command;"..attrans("Command")..";"..minetest.formspec_escape(command).."]"
		if tonumber(mode)==2 then
			formspec=formspec
				.."style[command_on;font=mono]"
				.."field[0.8,3;7,1;command_on;"..attrans("Command (on)")..";"..minetest.formspec_escape(command_on).."]"
		end
	else
		formspec=formspec.."field[0.8,1.5;7,1;channel;"..attrans("Digiline channel")..";"..minetest.formspec_escape(channel).."]"
	end
	return formspec.."button_exit[0.5,4.5;7,1;save;"..attrans("Save").."]"
end

--from trainlogic.lua train step
local matchptn={
	["SM"]=function(id, train)
		train.tarvelocity=train.max_speed
		return 2
	end,
	["S([0-9]+)"]=function(id, train, match)
		train.tarvelocity=tonumber(match)
		return #match+1
	end,
	["B([0-9]+)"]=function(id, train, match)
		local btar = tonumber(match)
		if train.velocity>btar then
			train.atc_brake_target=btar
			if not train.tarvelocity or train.tarvelocity>btar then
				train.tarvelocity=btar
			end
		else
			-- independent of brake target, must make sure that tarvelocity is not greater than it
			if train.tarvelocity and train.tarvelocity>btar then
				train.tarvelocity=btar
			end
		end
		return #match+1
	end,
	["BB"]=function(id, train)
		train.atc_brake_target = -1
		train.tarvelocity = 0
		return 2
	end,
	["W"]=function(id, train)
		train.atc_wait_finish=true
		return 1
	end,
	["D([0-9]+)"]=function(id, train, match)
		train.atc_delay=tonumber(match)
		return #match+1
	end,
	["R"]=function(id, train)
		if train.velocity<=0 then
			advtrains.invert_train(id)
			advtrains.train_ensure_init(id, train)
			-- no one minds if this failed... this shouldn't even be called without train being initialized...
		else
			atwarn(sid(id), attrans("ATC Reverse command warning: didn't reverse train, train moving!"))
		end
		return 1
	end,
	["O([LRC])"]=function(id, train, match)
		local tt={L=-1, R=1, C=0}
		local arr=train.atc_arrow and 1 or -1
		train.door_open = tt[match]*arr
		return 2
	end,
	["K"] = function(id, train)
		if train.door_open == 0 then
			atwarn(sid(id), attrans("ATC Kick command warning: Doors closed"))
			return 1
		end
		if train.velocity > 0 then
			atwarn(sid(id), attrans("ATC Kick command warning: Train moving"))
			return 1
		end
		local tp = train.trainparts
		for i=1,#tp do
			local data = advtrains.wagons[tp[i]]
			local obj = advtrains.wagon_objects[tp[i]]
			if data and obj then
				local ent = obj:get_luaentity()
				if ent then
					for seatno,seat in pairs(ent.seats) do
						if data.seatp[seatno] and not ent:is_driver_stand(seat) then
							ent:get_off(seatno)
						end
					end
				end
			end
		end
		return 1
	end,
	["A([01])"]=function(id, train, match)
		if not advtrains.interlocking then return 2 end
		advtrains.interlocking.ars_set_disable(train, match=="0")
		return 2
	end,
	["Cpl"]=function(id, train)
		train.atc_wait_autocouple=true
		return 3
	end,
}

eval_conditional = function(command, arrow, speed)
	--conditional statement?
	local is_cond, cond_applies, compare
	local cond, rest=string.match(command, "^I([%+%-])(.+)$")
	if cond then
		is_cond=true
		if cond=="+" then
			cond_applies=arrow
		end
		if cond=="-" then
			cond_applies=not arrow
		end
	else 
		cond, compare, rest=string.match(command, "^I([<>]=?)([0-9]+)(.+)$")
		if cond and compare then
			is_cond=true
			if cond=="<" then
				cond_applies=speed<tonumber(compare)
			end
			if cond==">" then
				cond_applies=speed>tonumber(compare)
			end
			if cond=="<=" then
				cond_applies=speed<=tonumber(compare)
			end
			if cond==">=" then
				cond_applies=speed>=tonumber(compare)
			end
		end
	end	
	if is_cond then
		atprint("Evaluating if statement: "..command)
		atprint("Cond: "..(cond or "nil"))
		atprint("Applies: "..(cond_applies and "true" or "false"))
		atprint("Rest: "..rest)
		--find end of conditional statement
		local nest, pos, elsepos=0, 1
		while nest>=0 do
			if pos>#rest then
				atwarn(sid(id), attrans("ATC command syntax error: I statement not closed: @1",command))
				return ""
			end
			local char=string.sub(rest, pos, pos)
			if char=="I" then
				nest=nest+1
			end
			if char==";" then
				nest=nest-1
			end
			if nest==0 and char=="E" then
				elsepos=pos+0
			end
			pos=pos+1
		end
		if not elsepos then elsepos=pos-1 end
		if cond_applies then
			command=string.sub(rest, 1, elsepos-1)..string.sub(rest, pos)
		else
			command=string.sub(rest, elsepos+1, pos-2)..string.sub(rest, pos)
		end
		atprint("Result: "..command)
	end
	return command
end

function atc.execute_atc_command(id, train)
	--strip whitespaces
	local command=string.match(train.atc_command, "^%s*(.*)$")
	
	
	if string.match(command, "^%s*$") then
		train.atc_command=nil
		return
	end

	train.atc_command = eval_conditional(command, train.atc_arrow, train.velocity)
	
	if not train.atc_command then return end
	command=string.match(train.atc_command, "^%s*(.*)$")
	
	if string.match(command, "^%s*$") then
		train.atc_command=nil
		return
	end
	
	for pattern, func in pairs(matchptn) do
		local match=string.match(command, "^"..pattern)
		if match then
			local patlen=func(id, train, match)
			--atdebug("Executing: "..string.sub(command, 1, patlen))
			--atdebug("Train ATC State: tvel=",train.tarvelocity,"brktar=",train.atc_brake_target,"delay=",train.atc_delay,"wfinish=",train.atc_wait_finish,"wacpl=",train.atc_wait_autocouple)

			train.atc_command=string.sub(command, patlen+1)
			if train.atc_delay<=0
				and not train.atc_wait_finish
				and not train.atc_wait_autocouple then
				--continue (recursive, cmds shouldn't get too long, and it's a end-recursion.)
				atc.execute_atc_command(id, train)
			end
			return
		end
	end
	atwarn(sid(id), attrans("ATC command parse error: Unknown command: @1", command))
	atc.train_reset_command(train, true)
end



--move table to desired place
advtrains.atc=atc