minetest.git - modified minetest for gpcfs purposes

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if S.trains == nil then S.trains = {} end
if not S.odsd then S.odsd = {} end
if not S.cpoints then S.cpoints = {} end
S.pd = {}
S.pdt = {}
__approach_callback_mode = 1

F.odj = {}

-- F.dst - Get summer time
function F.dst()
  if os.date().isdst then return "CEST" else return "CET" end
end

function F.pccheck(pos, state)
  if is_passive(pos) then return true end
  return (getstate(pos) == state)
end

-- F.error - Send error with error code
function F.error(errorcode)
  error(F.errlist[errorcode])
end

-- Level crossing handling
if not S.crossings then S.crossings = {} end

local crossing_light_count = {
  NRG_1 = 2,
  NRG_2 = 4,
  NRG_3 = 3,
  NRG_4 = 2,
  NRG_5 = 4,
  NRG_6 = 4,
  NRG_7 = 2,
  NRG_8 = 4,
  SWALD_1 = 2,
  SWALD_2 = 4,
}

local function update_light(loc, k, v)
  local t = S.crossings[loc]
  if not t then
    t = {}
    S.crossings[loc] = t
  end
  t[k] = v
  local val = "on"
  if next(t) == nil then
    val = "off"
  end
  local pfx = loc .. "_"
  local count = crossing_light_count[loc]
  if not count then return end
  for i = 1, count do
    setstate(pfx .. i, val)
  end
end

function F.crossing_on(t)
  for loc, k in pairs(t) do
    update_light(loc, k, true)
  end
end

function F.x_on(t)
  if event.type == "train" and atc_arrow then
    return F.crossing_on(t)
  end
end

function F.ax_on(t)
  __approach_callback_mode = 1
  if (event.type == "approach" or event.type == "train") and atc_arrow then
    return F.crossing_on(t)
  end
end

function F.sx_on(t)
  if event.type == "schedule" and (event.msg or {}).depart then
    return F.crossing_on(t)
  end
end

function F.x_off(t)
  if event.type ~= "train" then return end
  if not atc_arrow then return end
  for loc, k in pairs(t) do
    update_light(loc, k, nil)
  end
end

--[[ F.stnbasic - Basis for all station functions:
(By default, nil is defined as false or "no changes")
stn        = Station Code
side       = Door opening side
optime     = Length of time before train departs
reverse    = Reverse train before departing
acc        = Departure Speed
out        = Change outside text
reventry   = Allow trains to pass from the reverse direction
predepart  = Function to execute before departure
postdepart = Function to execute after departure
next       = Next stop
]]

function F.stnbasic(stn, side, optime, reverse, acc, out, reventry, predepart, postdepart, next,track)
  if not event then return end
  if event.type == "train" then
    if atc_arrow then
      if (get_rc() or ""):match ("FREIGHT") then
        atc_send (reverse and "RSM" or "SM")
        return
      end
      local cmdstr=""
      local t_sched = ((optime or 15) + 1)
      if out then
        atc_set_text_outside (out)
      end
      local intext = "Unknown Station"
      if stn then
        intext = F.stnlist[stn] or stn
      end
      atc_set_text_inside (intext)
      cmdstr = "BBWO" .. (side or "R")
      if type (predepart) == "function" then 
        predepart ()
      end
      S.trains[atc_id] = {
        v = 1,
        l = (get_line() or ""),
        s = stn,
        t = (trk or "N/A"),
      }
      cmdstr = cmdstr .."D" .. math.floor((optime or 15)) .. "OCD1"
      if reverse then
        cmdstr = cmdstr .. "R"
      end
      cmdstr = cmdstr .. "S" .. (acc or "M")
      atc_send (cmdstr)
      interrupt (t_sched,"")
    end
  elseif event.type == "int" then
    if atc_id then
      local intext = ""
      if next then
        intext = "Next stop: " .. (F.stnlist[next] or next)
      end
      if type (postdepart) == "function" then
        postdepart ()
      end
      atc_set_text_inside (intext)
    end
  end
end

-- F.hst - preset function for small stations (Haltestelle)
function F.hst(cur, nxt, side, spd, out, trk)
  F.stnbasic(cur, side, 10, false, spd, out, true, nil, nil, nxt, trk)
end

-- F.bhf - preset function for large stations (Bahnhof)
function F.bhf(cur, nxt, side, spd, out, trk)
  F.stnbasic(cur, side, 15, false, spd, out, true, nil, nil, nxt, trk)
end

-- F.kbhf - preset function for termini
function F.kbhf(cur, nxt, side, spd, out, trk)
  F.stnbasic(cur, side, 15, true, spd, out, true, nil, nil, nxt, trk)
end

-- F.timing - station with timing
function F.timing(d_off, d_int, cur, nxt, side, spd, out, trk, term, pre, post)
		  local timenow = os.time()
	  	local timesincelast = (timenow+d_off) % d_int
  local wait = d_int - timesincelast
  F.stnbasic(cur, side, wait, term, spd, out, true, pre, post, nxt, trk)
end

-- F.brk(direction) - sends ATC B2 command
function F.brk(dir)
  if event.type == "train" then
    if atc_arrow == dir then
      atc_send("B2S2")
    end
  end
end

-- Second version of the station function
function F.stn2gen(stn, trk, door, ret, chout, depspeed)
  __approach_callback_mode = 1
  if not stn then return end
  if not trk then return end
  if not door then door = "R" end
  if door~="L" and door~="R" and door~="C" then return end
  if not atc_arrow then return end
  if not F.stndet[stn] then return end
  if not F.stndet[stn][trk] then return end
  local t = F.stndet[stn][trk]
  local stop = false
  if #t==0 then return end
  local l = get_line()
  if (not l) or l==" " then return end
  local rc = get_rc() or ""
  if rc:match("FREIGHT") and atc_id then
    atc_send (ret and "BBWRSM" or "SM")
    return
  end
  if event.type == "approach" and not event.has_entered then
    for i = 1, #t, 1 do
      if t[i][1]==l then
        atc_set_ars_disable(true)
        atc_set_lzb_tsr(2)
        local intext = ("Arriving at: %s (Track: %s)"):format(F.stnlist[stn] or stn, trk)
        atc_set_text_inside(intext)
        S.trains[atc_id] = {
          v = 2,
          l = get_line() or "",
          s = stn,
          t = trk or "N/A",
          ts = os.time(),
          mode = "APP",
        }
        return
      end
    end
    return
  elseif event.type == "train" then
    for i = 1, #t, 1 do
      if t[i][1]==l then
        stop = true
        local timenow = rwt.to_secs(rwt.now())
        local interval = F.lines[l].interval
        local offset = t[i][7]
        local arroff, arrts, depts
        if interval and offset then
          arroff = timenow%(F.lines[l].rtt or interval)
          interval = (offset-timenow)%interval
          interval = math.max(5, math.min(45, interval))
          arrts = ("%s (%s)"):format(rwt.to_string(timenow), rwt.to_string(arroff, true))
          depts = ("%s (%s)"):format(rwt.to_string(timenow+interval), rwt.to_string(arroff+interval, true))
        else
          interval = 15
          arrts = rwt.to_string(timenow)
          depts = rwt.to_string(timenow+interval)
        end
        --atc_send(string.format("A0B0WO%sD%dOCD1%sA1S%s", door, interval, (ret and "R" or ""), tostring(depspeed or "M")))
        atc_send(("B0WO%s"):format(door))
        local nxt = t[i][2]
        local intext_nxt = ""
        local nxtdisp = ""
        if F.stnlist[nxt] then
          intext_nxt = F.stnlist[nxt] and ("Next station: %s (Track: %s)"):format(F.stnlist[nxt], t[i][3] or "?") or ""
          nxtdisp = intext_nxt
        end
        local intext = ("%s\n%s\nArrival: %s\nDeparture: %s"):format(F.stnlist[stn] or stn, intext_nxt, arrts, depts)
        local outtext = F.lines[l].name or l
        if t[i].dest then
          chout = true
          outtext = outtext..": "..t[i].dest
        elseif t[i][4] then
          outtext = outtext..": "..(F.stnlist[t[i][4]] or t[i][4])
        end
        t[i][5] = t[i][5] or (timenow-(F.depint[l] or 300))
        -- note that the "average" time is weighted
        t[i][6] = t[i][6] and (t[i][6]+timenow-t[i][5]+30)/2 or (timenow-t[i][5])
        t[i][5] = timenow
        atc_set_text_inside(intext)
        if chout then
          if type(chout) == "string" then
            atc_set_text_outside(chout)
          else
            atc_set_text_outside(outtext)
          end
        end
        S.trains[atc_id] = {
          v = 2,
          l = (get_line() or ""),
          s = stn,
          t = (trk or "N/A"),
          ts = os.time(),
          mode = "ARR",
        }
        schedule_in(interval, {intext = nxtdisp, depart = true})
        break
      end
    end
    if (not stop) then
      atc_send((ret and "BBWR" or "").."A1S"..(depspeed or "M"))
    end
  elseif event.type == "schedule" then
    if atc_id then
      local msg = event.msg or {}
      if msg.intext then
        atc_set_text_inside(msg.intext)
      end
      atc_send("OCD1"..((ret and atc_arrow) and "B0WR" or "").."A1S"..(depspeed or "M"))
      S.trains[atc_id] = {
        v = 2,
        l = get_line() or "",
        s = stn,
        t = trk or "N/A",
        ts = os.time(),
        mode = "DEP",
      }
    end
  end
end

function F.tram2gen(stn,trk,ret)
  return F.stn2gen(stn,trk,"C",ret,true,8)
end

function F.disp2gen(stn)
  if not stn then return end
  if not F.stndet[stn] then return end
  local s = F.stndet[stn]
  local sn = F.stnlist[stn] or stn
  local d={{
    {sn.."\nTrack    Line"},
    {(string.sub(sn, 28, 54) or "").." \nDestination"},
    {" \nEstimated Arrival"}
  }}
  local c=2
  local t={}
  for i,_ in pairs(s) do t[#t+1]=i end
  table.sort(t)
  for i = 1,#t,1 do
    local trkname = t[i]
    local trk = s[trkname]
    for j = 1,#trk,1 do
      local det = trk[j]
      local r = (c%4==0) and (c/4+1) or ((c-c%4)/4+1)
      if not d[r] then d[r]={{},{},{}} end
      d[r][1][#d[r][1]+1] = string.format("%-8s %s", tostring(trkname), F.lines[det[1]].name)
      d[r][2][#d[r][2]+1] = (F.lines[det[1]].ring and "Ring Line" or (F.stnlist[det[4]] or det[4] or ""))
      c=c+1
      local earr = (det[5] or rwt.to_secs(rwt.now()))+(det[6] or F.depint[det[1]] or 600)
      d[r][3][#d[r][3]+1] = rwt.to_string(earr)
    end
  end
  for i = 1, #d, 1 do
    for j = 1, #d[i], 1 do
      digiline_send("d_"..tostring(i).."_"..tostring(j), table.concat(d[i][j],"\n"))
    end
  end
end

--function F.disp2gen() end

function F.pdisp(stn, trk, dn)
  if not (stn and trk and dn) then return end
  if not F.stndet[stn] or not F.stndet[stn][trk] then return end
  if not S.pd[stn] then S.pd[stn] = { [trk] = {[dn] = 0} } end
  if not S.pd[stn][trk] then S.pd[stn][trk] = {[dn] = 0} end
  if not S.pd[stn][trk][dn] then S.pd[stn][trk][dn] = 0 end
  if not S.pdt[stn] then S.pdt[stn] = {} end
  if not S.pdt[stn][trk] then
    local t = {}
    for i = 1, #F.stndet[stn][trk], 1 do
      local v = F.stndet[stn][trk][i]
      t[#t+1] = ("Track: %s\n%s\nTo: %s\nNext: %s"):format(
        trk, F.lines[v[1]].name, F.stnlist[v[4] or "N/A"] or v[4] or "N/A",
        F.stnlist[v[2] or "N/A"] or v[2] or "N/A")
    end
    S.pdt[stn][trk] = t
  end
  local n = S.pd[stn][trk][dn] + 1
  local t = S.pdt[stn][trk]
  digiline_send("track"..trk,t[n])
  if n >= #t then n = 0 end
  S.pd[stn][trk][dn] = n
end

function F.dirsign(stn, trk, ln, arrow)
  if event.type == "init" or event.type == "punch" then
    if not (stn and trk and ln and arrow) then return end
    local t = F.stndet[stn]
    if not t then return end
    t = t[trk]
    if not t then return end
    for i = 1, #t, 1 do
      if t[i][1] == ln then
        digiline_send("lcd",("%s T. %s | %s | %s"):format(arrow, trk, F.lines[ln].name, F.stnlist[t[i][4]]))
        break
      end
    end
  end
end

function F.eval(expr, rettrue, retfalse)
  if expr then return rettrue else return retfalse end
end

function F.checkpoint(name,arrow,opp)
  if event.train then
    S.trains[atc_id] = "C "..name.." "
    if atc_arrow then
      S.trains[atc_id] = S.trains[atc_id]..arrow
    else
      S.trains[atc_id] = S.trains[atc_id]..opp
    end
  end
end

function F.atc (cmd, intext, outtext)
  if event.type == "train" then
    if atc_arrow then
      if cmd then
        atc_send (cmd)
      end
      if intext then
        atc_set_text_inside (intext)
      end
      if outtext then
        atc_set_text_outside (outtext)
      end
    end
  end
end

F.stnlist = {
  ["N/A"]          = "N/A",
  Bts              = "Berton St.",
  cg               = "Colored Grasses",
  clockwise        = "Clockwise",
  counterclockwise = "Counterclockwise",
  cras             = "ARSE7's Shop",
  crbfost          = "Station East",
  crbfsm           = "Station St. Central",
  crbfso           = "Station St. East",
  crbfsw           = "Station St. West",
  crch             = "Crossroads City Hall",
  crchs            = "City Hall South",
  crmtrail         = "Mountain Railway Terminus",
  crshelter1       = "Shelter I",
  crsfterm         = "South Forest St. Terminal",
  crsmacker        = "Smacker's Station",
  crwm             = "West Mountains",
  elchateau        = "Chateau d'Erstazi",
  elgp             = "Greener Pastures",
  elsf             = "Salt Factory",
  evo              = "EVO",
  grsc             = "Grassy Scarp",
  krasnograd       = "Krasnograd-FTNT",
  mushroom         = "Mushroom Land",
  neverbuild       = "Neverbuild",
  nvbcentral       = "Neverbuild Central",
  nvbold           = "Old Terminus",
  nvboutskirts     = "Neverbuild Outskirts",
  ["NRG-bplatz"]   = "Berliner Platz",
  ["NRG-CW"]       = "Dörfle",
  ["NRG-harbor"]   = "Hafengebiet",
  ["NRG-krstr"]    = "Krasnograder Straße",
  ["NRG-museum"]   = "Museum",
  ["NRG-pek"]      = "Pekinger Straße",
  ["NRG-south"]    = "Südbahnhof",
  ["NRG-townhall"] = "Rathaus",


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