/// <summary>
/// Gets collection of the stations.
/// </summary>
/// <param name="station">Wanted station.</param>
/// <returns></returns>
/// <exception cref="DataNotFoundException"/>
/// <exception cref="WrongDataProvidedException"/>>
/// <exception cref="WebException"/>
/// <exception cref="ArgumentException"/>
public IEnumerable <Station> GetStations(string station)
{
try
{
//Get html document of the stations
var doc = PkpPageInfo.GetHtmlDocumentOfStations(station);
//Get table with all found stations
var table = GetTable(doc.DocumentNode);
//Collection with stations to return
List <Station> coll_stations = new List <Station>();
//Get all rows from the table
foreach (HtmlNode row in table.SelectNodes("tr")
?? throw new NodeNotFoundException("Rows were not found"))
{
//Get all cells from the current row
foreach (HtmlNode cell in row.SelectNodes("td")
?? throw new NodeNotFoundException("Cells were not found"))
{
//Remove unnecessary white spaces.
string trimed = cell.InnerText.Trim();
//Get value from onlick attribute
string id = cell.GetAttributeValue("onclick", "Not found");
//If it's not found then throw the exception
if (id == "Not found")
{
throw new NodeAttributeNotFoundException("Onclick was not found");
}
//Get the train id from the value
id = id.Substring(id.IndexOf("id=") + 3);
//add station to the collection
coll_stations.Add(new Station(trimed, id));
}
}
return(coll_stations);
}
catch (ArgumentException ex) //It occurs when the station has not been found
{
throw new WrongDataProvidedException("The station name was not found", ex);
}
catch (Exception ex) //Other exceptions are expected and about not finding data
{
//So check the thrown exception if it's a type of any those ones
if (ex is NodeNotFoundException || ex is NodeAttributeNotFoundException || ex is ArgumentOutOfRangeException)
{
throw new DataNotFoundException(ex); //and throw it
}
throw ex;
}
}
/// <summary>
/// Gets <see cref="DelayInfoCollection{TBy, TData}"/> in regard of the given station
/// </summary>
/// <exception cref="DataNotFoundException"/>
/// <exception cref="WebException"/>
public DelayInfoCollection <Station, IDelayInfo <Station> > GetStationDelayInfos(Station station)
{
try
{
//get html document of the trains by the given station with their delay time.
var doc = PkpPageInfo.GetHtmlDocumentOfDelayedTrains(station.StationID);
//get table that contains trains with delay time.
var tables = GetMultipleTables(doc.DocumentNode);
//Helper variables
string trainName = string.Empty, id = string.Empty, host = string.Empty, from = string.Empty, destination = string.Empty;
DateTime date = default;
TimeSpan?planned = default, delay = null;