public static async Task <GeoTagsEntry> TryToLocateAsync([CanBeNull] string address)
{
if (string.IsNullOrWhiteSpace(address))
{
return(null);
}
var key = Key + address;
if (CacheStorage.Contains(key))
{
var cache = CacheStorage.GetPointNullable(key);
return(cache.HasValue ? new GeoTagsEntry(cache.Value.X, cache.Value.Y) : null);
}
try {
var result = await YahooApiProvider.LocateAsync(address);
if (result.LatitudeValue.HasValue && result.LongitudeValue.HasValue)
{
Logging.Write($"“{address}”, geo tags: ({result})");
CacheStorage.Set(key, new Point(result.LatitudeValue.Value, result.LongitudeValue.Value));
return(result);
}
CacheStorage.Set(key, "");
return(null);
} catch (WebException e) {
Logging.Warning("TryToLocateAsync(): " + e.Message);
return(null);
} catch (Exception e) {
Logging.Warning("TryToLocateAsync(): " + e);
CacheStorage.Set(key, "");
return(null);
}
}