public static void Validate(this SaveLanguageModel language)
{
if (language == null)
{
throw new ArgumentNullException(nameof(language));
}
if (string.IsNullOrEmpty(language.Name))
{
throw new ArgumentNullException(nameof(language.Name), "Name is null or empty.");
}
if (!language.YearStart.HasValue)
{
throw new ArgumentNullException(nameof(language.YearStart), "YearStart has no value.");
}
if (!language.YearEnd.HasValue)
{
throw new ArgumentNullException(nameof(language.YearEnd), "YearEnd has no value.");
}
if (string.IsNullOrEmpty(language.GeoJson.ToString()) || language.GeoJson.ToString() == "{}")
{
throw new ArgumentNullException(nameof(language.GeoJson), "GeoJson is null or empty");
}
}
public static async ValueTask <EntityEntry <Language> > AddModelAsync(this DbSet <Language> db, SaveLanguageModel model)
{
model.Validate();
var feature = DataConverter.DeserializeGeoJson <Feature>(model.GeoJson.ToString());
model.Area = feature.Geometry;
if (!Orientation.IsCCW(model.Area.Coordinates))
{
model.Area = model.Area.Reverse();
}
if (model.Area == null)
{
throw new InvalidOperationException("Unable to convert given geoJSON into a Geometry");
}
return(await db.AddAsync(model));
}
