/// <summary>
/// Tries to parse a start direction from given location description. Some locations, e.g.
/// from the DHV Geländedatenbank, have the start directions in the description, after a
/// certain text.
/// </summary>
/// <param name="description">location description</param>
/// <param name="takeoffDirections">parsed takeoff directions</param>
/// <returns>true when a takeoff direction could be parsed, or false when not</returns>
private static bool TryParseStartDirectionFromDescription(string description, out TakeoffDirections takeoffDirections)
{
takeoffDirections = TakeoffDirections.None;
const string StartDirectionText = "Startrichtung ";
int posStartDirection = description.IndexOf(StartDirectionText);
if (posStartDirection == -1)
{
return(false);
}
int posLineBreak = description.IndexOf("<br", posStartDirection);
if (posLineBreak == -1)
{
posLineBreak = description.Length;
}
posStartDirection += StartDirectionText.Length;
string direction = description.Substring(posStartDirection, posLineBreak - posStartDirection);
return(TakeoffDirectionsHelper.TryParse(direction, out takeoffDirections));
}
public void TestTryParseCorrectTakeoffTexts()
{
// set up
string[] correctTakeoffTexts = new string[]
{
"N",
"SSW",
"N-E",
"N-SSE",
"N-S",
"N-SSW",
"E-WSW",
"E-W",
"E-WNW",
"N-NNW",
"S-SW,NW-W",
"S-SW, NW-W",
"O-NO",
"West takeoff (W-SW)",
"Takeoff (N, O, S)",
"Takeoff (NO, NW)",
};
foreach (var text in correctTakeoffTexts)
{
// run
bool result = TakeoffDirectionsHelper.TryParse(text, out TakeoffDirections takeoffDirections);
Debug.WriteLine($"text={text} directions={takeoffDirections}");
// check
Assert.IsTrue(result, "text must have been parsed correctly");
Assert.IsTrue(takeoffDirections != TakeoffDirections.None, "takeoff direction must not be empty");
}
}
/// <summary>
/// Adds takeoff directions value to every location in the list
/// </summary>
/// <param name="locationList">location list to modify</param>
private static void AddTakeoffDirections(List <Location> locationList)
{
foreach (var location in locationList)
{
if (TakeoffDirectionsHelper.TryParse(location.Name, out TakeoffDirections takeoffDirections))
{
location.TakeoffDirections = takeoffDirections;
}
else if (TryParseStartDirectionFromDescription(location.Description, out TakeoffDirections takeoffDirections2))
{
location.TakeoffDirections = takeoffDirections2;
}
}
}
public void TestTryParseInvalidTakeoffTexts()
{
// set up
string[] invalidTakeoffTexts = new string[]
{
"SR",
"SSW-",
"N-NNW-",
"S-SW NW-W",
};
foreach (var text in invalidTakeoffTexts)
{
// run
bool result = TakeoffDirectionsHelper.TryParse(text, out TakeoffDirections takeoffDirections);
// check
Assert.IsFalse(result, "text parsing must have failed");
Assert.IsTrue(takeoffDirections == TakeoffDirections.None, "takeoff direction must be None");
}
}