/// <summary>
/// Reads the html source code of the PTA train time table and extracts
/// all relevant data, including, lines, stations times and gps coordinates.
/// </summary>
/// <param name="Source"></param>
/// <returns>Returns a TimeTable object that encapsulates all info extracted</returns>
public TimeTable ParseTrainTimeTable(string Source)
{
// Set up the
HtmlDocument htmlDocument = new HtmlDocument();
htmlDocument.LoadHtml(Source);
// Access required information by targeting div elements with unique ids
var stations = htmlDocument.DocumentNode.SelectNodes("//div[@id='ttMargin']");
var times = htmlDocument.DocumentNode.SelectNodes("//div[@id='ttBody']");
var line = htmlDocument.DocumentNode.SelectNodes("//div[@id='ttHeadline']");
TimeTable timeTable = new TimeTable();
GeoCode geoCoder = new GeoCode();
// Set Line name
timeTable.Line = line.First().FirstChild.FirstChild.InnerText;
Station station;
// Loop through all the ChildNodes (i.e. All the stations)
for (int i = 0; i < stations.First().ChildNodes.Count; i++)
{
// Create a new station and add it to the list
timeTable.Stations.Add(station = new Station
{
Name = stations.First().ChildNodes[i].ChildNodes[1].FirstChild.InnerText,
});
// Set location information
station.Geo = geoCoder.GeoCodeStation(station);
// Loop through all the ChildNodes (i.e. All the times) and add the time to the station
for (int j = 0; j < times.First().ChildNodes[i + 1].ChildNodes.Count; j++)
station.Times.Add(j,
times.First().ChildNodes[i + 1].ChildNodes[j].FirstChild.InnerText);
}
return timeTable;
}
/// <summary>
/// Calls a series of methods that Reads, Scrapes and Inserts into DB
/// </summary>
/// <param name="Url">Url to scrape</param>
public void ScrapeTimeTable(string Url)
{
this.timeTable = new Parser().ParseTrainTimeTable(new Reader().Read(Url));
this.InsertIntoDatabase();
}
