/// <summary>
/// Determines the direction of the line and flips it neccesary.
/// </summary>
/// <returns>Whether the direction could be determined</returns>
private bool determineDirection()
{
double firstDist = double.NaN;
foreach (StationInfo station in stations)
{
if (station.IntDistance != -1)
{
Station st = DatabaseLegacy.GetStation(station.Name);
double dist;
if (st != null && !double.IsNaN(dist = Polyline.GetProjectedDistance(WebMercator.DefaultMap.FromLatLon(st.GPSCoord), 0.05)))
{
if (double.IsNaN(firstDist))
{
firstDist = dist;
}
else //if (double.IsNaN(secondDist))
{
if (dist < firstDist)
{
Polyline = new Polyline(Polyline.Points.Reverse().ToList());
}
return(true);
}
}
}
}
return(true);
}
public IActionResult Get(double lat = double.NaN, double lon = double.NaN, double radius = double.NaN)
{
if (double.IsNaN(lat) || double.IsNaN(lon) || double.IsNaN(radius))
{
return(BadRequestError("Parameters lat, lon and radius must exist and must be numbers."));
}
double kmpp = WebMercator.Default.MeterPerUnit() / 1000;
List <(double distance, Station station)> stations = new List <(double distance, Station station)>();
foreach (Station station in DatabaseLegacy.GetAllStations())
{
double dist = (WebMercator.Default.FromLatLon(station.GPSCoord) - WebMercator.Default.FromLatLon(new Vector2(lat, lon))).Length * kmpp;
if (dist <= radius)
{
// Implementing a standard insertion sort
int i;
for (i = 0; i < stations.Count; i++)
{
if (stations[i].distance > dist)
{
break;
}
}
stations.Insert(i, (dist, station));
}
}
JArray result = new JArray();
foreach ((double distance, Station station) in stations)
{
JObject so = new JObject
{
["name"] = station.Name,
["gpscoord"] = station.GPSCoord == null ? null : new JObject()
{
["lat"] = station.GPSCoord.X, ["lon"] = station.GPSCoord.Y
},
["distance"] = distance
};
result.Add(so);
}
return(Success(result));
}
/// <summary>
/// Updates fields based on a TRAIN API JSON request
/// </summary>
/// <param name="apiResponse">JSON TRAIN MÁV API response</param>
public void UpdateTRAIN_API(JObject apiResponse)
{
HtmlDocument trainHTML = new HtmlDocument();
trainHTML.LoadHtml(WebUtility.HtmlDecode((string)apiResponse["d"]["result"]["html"]));
HtmlNode table;
try
{
table = trainHTML.DocumentNode.Descendants("table").Where(tb => tb.HasClass("vt")).First();
}
catch (InvalidOperationException e)
{
throw new MAVAPIException("Cannot parse train table.");
}
string fix2400Time(string s)
{
if (s.Trim() == "24:00")
{
return("0:00");
}
else
{
return(s);
}
}
try
{
// The header containing train type and name information
IEnumerable <HtmlNode> tableHeader = table.Descendants("th").First().Descendants();
string[] name = tableHeader.First().InnerHtml.Split(new char[] { ' ', '\r', '\n', '\t' }, StringSplitOptions.RemoveEmptyEntries);
Number = name[0];
// Figuring out train type
if (name.Length > 1)
{
if (name[1].Trim().ToLower() == "sebesvonat" || name[1].Trim().ToLower() == "gyorsvonat" || name[1].Trim().ToLower() == "személyvonat" ||
name[1].Trim().ToLower() == "EuroRegio" || name[1].Trim().ToLower() == "InterCity" || name[1].Trim().ToLower() == "EuroCity" ||
name[1].Trim().ToLower() == "vonatpótló autóbusz" || name[1].Trim().ToLower() == "railjet")
{
Type = name[1].Trim().ToLower();
}
else
{
Name = name[1];
}
}
bool ul = false;
foreach (HtmlNode node in tableHeader)
{
// This is a sort of secondary train type for specific trains
if (node.HasClass("viszszam2"))
{
NumberType = node.InnerHtml;
}
// Sometimes train type can only be decuded from the alt of an image
else if (node.Name == "img" && !ul)
{
Type = node.Attributes["alt"].Value;
}
// Sometimes trains can be broken down into multiple types
else if (node.Name == "ul")
{
ul = true;
Type = "";
foreach (HtmlNode li in node.Descendants("li"))
{
string type = "";
type = Regex.Replace(li.Descendants().First().InnerHtml, @"\s+", " ");
IEnumerable <HtmlNode> img = li.Descendants().Where(d => d.Name == "img");
if (img != null && img.Any())
{
type += " " + img.First().Attributes["alt"].Value;
}
Type += (Type == "" ? "" : "\n") + type;
}
}
}
// Any information that might be helpful
miscInfo.Clear();
IEnumerable <HtmlNode> miscInform = table.Descendants("th").Skip(1);
foreach (HtmlNode node in miscInform)
{
// The actual table headers start which are uninteresting
if (node.InnerHtml == "Km")
{
break;
}
// Anything starting with this text is redundant with another API's information
if (node.InnerHtml.StartsWith("A pillanatnyi késés"))
{
continue;
}
// Anything containing the word delay is related to delays (this might fail)
else if (node.InnerHtml.Contains("késés"))
{
DelayReason = node.InnerHtml;
}
// The truly misc info
else
{
miscInfo.Add(node.InnerHtml);
}
}
}
catch (InvalidOperationException e)
{
throw new MAVAPIException("Cannot parse train header.");
}
if ((apiResponse["d"]["result"]["line"] as JArray).Count == 0)
{
throw new MAVAPIException("Cannot get train line.");
}
bool hasTrainData = HasTRAINData; // Polyline will be defined in a second so that would skew our method
// Polyline of the train path
List <Vector2> points = Polyline.DecodePoints(apiResponse["d"]["result"]["line"][0]["points"].ToString(), 1E5f);
Polyline = new Polyline(points);
// Station infos
IEnumerable <HtmlNode> stationRows = table.Descendants("tr").Where(tr => tr.Attributes.Contains("class"));
if (hasTrainData) // If we already have train data then stations will be updated
{
int stationCnt = 0;
foreach (HtmlNode stationRow in stationRows)
{
bool highlighted = stationRow.Attributes["class"].Value.StartsWith("row_past");
// Skip invalid rows
if (stationRow.Descendants("td").Count() < 4)
{
continue;
}
IEnumerator <HtmlNode> tdEnumerator = stationRow.Descendants("td").GetEnumerator();
tdEnumerator.MoveNext(); // On integer distance cell
tdEnumerator.MoveNext(); // On station name cell
tdEnumerator.MoveNext(); // On arrival time cell
TimeSpan expectedArrival = stations[stationCnt].ExpectedArrival.TimeOfDay; //Don't change if there's an error parsing
try
{
if (stationRows.First() != stationRow)
{
// Arrival time parsing block
{
IEnumerator <HtmlNode> timeEnumerator = tdEnumerator.Current.Descendants().GetEnumerator();
timeEnumerator.MoveNext(); // On the first text block contatining scheduled arrival
if (timeEnumerator.MoveNext()) // On a <br>
{
timeEnumerator.MoveNext(); // On the second text block in a span containing expected arrival
expectedArrival = TimeSpan.ParseExact(fix2400Time(timeEnumerator.Current.InnerHtml), "g", null);
}
}
}
}
catch (FormatException e)
{
throw new MAVAPIException("Cannot parse train arrival time.");
}
tdEnumerator.MoveNext(); // On departure time cell
TimeSpan expectedDeparture = stations[stationCnt].ExpectedDeparture.TimeOfDay; //Don't change if there's an error parsing
try
{
if (stationRows.Last() != stationRow)
{
// Departure time parsing block
{
IEnumerator <HtmlNode> timeEnumerator = tdEnumerator.Current.Descendants().GetEnumerator();
timeEnumerator.MoveNext(); // On the first text block contatining scheduled departure
if (timeEnumerator.MoveNext()) // On a <br>
{
timeEnumerator.MoveNext(); // On the second text block in a span containing expected departure
expectedDeparture = TimeSpan.ParseExact(fix2400Time(timeEnumerator.Current.InnerHtml), "g", null);
}
}
}
}
catch (FormatException e)
{
throw new MAVAPIException("Cannot parse train departure time.");
}
string platform = null;
if (tdEnumerator.MoveNext()) // There might not even be a cell for platforms
{
// On platform cell
platform = tdEnumerator.Current.InnerHtml.Trim();
}
DateTime expectedArrivalDateTime = stations[stationCnt].Arrival.Date + expectedArrival, expectedDepartureDateTime = stations[stationCnt].Departure.Date + expectedDeparture;
if (stations[stationCnt].Arrival.TimeOfDay > expectedArrival) // we are on the border of this day
{
expectedArrivalDateTime = stations[stationCnt].Arrival.Date.AddDays(1) + expectedArrival;
}
if (stations[stationCnt].Departure.TimeOfDay > expectedDeparture) // we are on the border of this day
{
expectedDepartureDateTime = stations[stationCnt].Departure.Date.AddDays(1) + expectedDeparture;
}
stations[stationCnt++].Update(expectedArrivalDateTime, expectedDepartureDateTime, highlighted || (expectedDepartureDateTime <= DateTime.Now), platform == "" ? null : platform);
}
}
else // If we don't have train data already then stations must be added, and the distance information also has to be calculated
{
foreach (HtmlNode stationRow in stationRows)
{
bool highlighted = stationRow.Attributes["class"].Value.StartsWith("row_past");
// Skip invalid rows
if (stationRow.Descendants("td").Count() < 4)
{
continue;
}
IEnumerator <HtmlNode> tdEnumerator = stationRow.Descendants("td").GetEnumerator();
tdEnumerator.MoveNext(); // On integer distance cell
int intDistance = -1;
if (tdEnumerator.Current.InnerHtml.Trim() != "")
{
try
{
intDistance = int.Parse(tdEnumerator.Current.InnerHtml);
}
catch (FormatException e)
{
throw new MAVAPIException("Cannot parse train station distance cell.");
}
}
tdEnumerator.MoveNext(); // On station name cell
string stationName = tdEnumerator.Current.InnerText;
DateTime date = new DateTime(0);
try
{
date = DateTime.ParseExact(Regex.Match(tdEnumerator.Current.Descendants("a").First().Attributes["onclick"].Value, "d: '(?<date>[^' ]*?)'").Groups["date"].Value, "yy.MM.dd", null);
}
catch (FormatException e)
{
throw new MAVAPIException("Cannot parse train date.");
}
tdEnumerator.MoveNext(); // On arrival time cell
TimeSpan arrival = new TimeSpan(0, 0, 0), expectedArrival = new TimeSpan(0, 0, 0);
try
{
if (stationRows.First() != stationRow)
{
// Arrival time parsing block
{
IEnumerator <HtmlNode> timeEnumerator = tdEnumerator.Current.Descendants().GetEnumerator();
timeEnumerator.MoveNext(); // On the first text block contatining scheduled arrival
arrival = TimeSpan.ParseExact(fix2400Time(timeEnumerator.Current.InnerHtml), "g", null);
if (timeEnumerator.MoveNext()) // On a <br>
{
timeEnumerator.MoveNext(); // On the second text block in a span containing expected arrival
expectedArrival = TimeSpan.ParseExact(fix2400Time(timeEnumerator.Current.InnerHtml), "g", null);
}
else
{
expectedArrival = arrival;
}
}
}
}
catch (FormatException e)
{
throw new MAVAPIException("Cannot parse train arrival time.");
}
tdEnumerator.MoveNext(); // On departure time cell
TimeSpan departure = new TimeSpan(0, 0, 0), expectedDeparture = new TimeSpan(0, 0, 0);
try
{
if (stationRows.Last() != stationRow)
{
// Departure time parsing block
{
IEnumerator <HtmlNode> timeEnumerator = tdEnumerator.Current.Descendants().GetEnumerator();
timeEnumerator.MoveNext(); // On the first text block contatining scheduled departure
departure = TimeSpan.ParseExact(fix2400Time(timeEnumerator.Current.InnerHtml), "g", null);
if (timeEnumerator.MoveNext()) // On a <br>
{
timeEnumerator.MoveNext(); // On the second text block in a span containing expected departure
expectedDeparture = TimeSpan.ParseExact(fix2400Time(timeEnumerator.Current.InnerHtml), "g", null);
}
else
{
expectedDeparture = departure;
}
}
}
}
catch (FormatException e)
{
throw new MAVAPIException("Cannot parse train departure time.");
}
string platform = null;
if (tdEnumerator.MoveNext()) // There might not even be a cell for platforms
{
// On platform cell
platform = tdEnumerator.Current.InnerHtml.Trim();
}
DateTime arrivalDateTime = date + arrival, departureDateTime = date + departure, expectedArrivalDateTime = date + expectedArrival, expectedDepartureDateTime = date + expectedDeparture;
if (arrival > departure) // we are on the border of this day
{
departureDateTime = date.AddDays(1) + departure;
}
if (arrival > expectedArrival) // we are on the border of this day
{
expectedArrivalDateTime = date.AddDays(1) + expectedArrival;
}
if (arrival > expectedDeparture) // we are on the border of this day
{
expectedDepartureDateTime = date.AddDays(1) + expectedDeparture;
}
StationInfo stationInfo = new StationInfo(stationName, intDistance, arrivalDateTime, departureDateTime, expectedArrivalDateTime, expectedDepartureDateTime,
highlighted || (expectedDepartureDateTime <= DateTime.Now), platform == "" ? null : platform);
stations.Add(stationInfo);
}
if (determineDirection())
{
int firstFound = -1;
for (int i = 0; i < stations.Count; i++)
{
if (stations[i].IntDistance != -1)
{
Station st = DatabaseLegacy.GetStation(stations[i].Name);
if (st != null)
{
stations[i].UpdateStation(st);
}
double dist = 0;
if (st != null && !double.IsNaN(dist = Polyline.GetProjectedDistance(WebMercator.DefaultMap.FromLatLon(st.GPSCoord), 0.25)))
{
stations[i].UpdateDistanceInformation(dist, StationPositionAccuracy.Precise);
if (firstFound == -1)
{
firstFound = i;
}
}
else if (!double.IsNaN(dist) && i > 0 && stations[i - 1].PositionAccuracy != StationPositionAccuracy.Missing)
{
stations[i].UpdateDistanceInformation(stations[i - 1].Distance + (stations[i].IntDistance - stations[i - 1].IntDistance), StationPositionAccuracy.IntegerPrecision);
}
}
}
for (int i = firstFound - 1; i >= 0; i--) // We do a reverse check as well so that we can figure out missing stations backwards from the first found
{
if (stations[i].IntDistance != -1 &&
(stations[i].Station != null && !double.IsNaN(Polyline.GetProjectedDistance(WebMercator.DefaultMap.FromLatLon(stations[i].Station.GPSCoord), 0.05))) &&
stations[i].PositionAccuracy == StationPositionAccuracy.Missing)
{
stations[i].UpdateDistanceInformation(stations[i + 1].Distance - (stations[i + 1].IntDistance - stations[i].IntDistance), StationPositionAccuracy.IntegerPrecision);
}
}
}
}
}
