Add "discard all" function to scheduler events and use it to clear schedules in luaatc rails

advtrains_line_automation/scheduler.lua

@@ -116,4 +116,15 @@ function sched.enqueue_in(rwtime, handler, evtdata, unitid, unitlim)
 	sched.enqueue(ctime + rwtime, handler, evtdata, unitid, unitlim)
 end
 
+-- Discards all schedules for unit "unitid" (removes them from the queue)
+function sched.discard_all(unitid)
+	for i=1,#queue do
+		if queue[i].u == unitid then
+			table.remove(queue,i)
+			i=i-1
+		end
+	end
+	units_cnt[unitid] = 0
+end
+
 ln.sched = sched

advtrains_luaautomation/active_common.lua

@@ -71,7 +71,12 @@ function ac.on_receive_fields(pos, formname, fields, player)
 		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={}