public EarthquakeFeedService(IEventAggregator eventAggregator,
IHttpClient httpClient,
IWorldCitiesRepository worldCitiesRepository,
IEarthquakeApiQueryBuilder earthquakeApiQueryBuilder,
IEarthquakeFeedServiceConfig config,
IEarthquakeActivityCollectionBuilder earthquakeActivityCollectionBuilder)
{
_eventAggregator = eventAggregator;
_earthquakeActivityCollectionBuilder = earthquakeActivityCollectionBuilder;
_httpClient = httpClient;
_worldCitiesRepository = worldCitiesRepository;
_earthquakeApiQueryBuilder = earthquakeApiQueryBuilder;
_config = config;
_earthquakeActivityCollectionBuilder = earthquakeActivityCollectionBuilder;
_timeFeedStarted = _lastFeedRetrievalTime.Subtract(config.InitialLoadHistoryTimeSpan);
_initialLoadHistoryEarthquakeActivitiesTask =
Task.Run(() => LoadEarthQuakeHistory(_timeFeedStarted, _lastFeedRetrievalTime));
_cancellationTokenSource = new CancellationTokenSource();
_cancellationToken = _cancellationTokenSource.Token;
_timer = new Timer(TimerTick);
_timer.Change(config.RefreshInterval, config.RefreshInterval);
Status = string.Format("Past {0} hrs activity retrieval started", config.InitialLoadHistoryTimeSpan.TotalHours);
}
public List <EarthquakeActivity> BuildEarthquakeActivities(dynamic earthquakeActivity, IWorldCitiesRepository worldCitiesRepository, int numberOfNearestCities)
{
int count = earthquakeActivity.features.Count;
List <EarthquakeActivity> earthquakeActivities = new List <EarthquakeActivity>();
for (int i = 0; i < count; i++)
{
double mag = earthquakeActivity.features[i].properties.mag;
long time = earthquakeActivity.features[i].properties.time;
DateTime dt = _timeHelper.FromUnixTime(time);
double longitude = earthquakeActivity.features[i].geometry.coordinates[0];
double latitude = earthquakeActivity.features[i].geometry.coordinates[1];
var geocoordinate = new GeoCoordinate(latitude, longitude);
earthquakeActivities.Add(new EarthquakeActivity()
{
DateTime = dt,
Magnitude = mag,
Location = geocoordinate,
AffectedCities = worldCitiesRepository.GetCitiesNearLocation(geocoordinate, numberOfNearestCities).ToList()
}
);
}
return(earthquakeActivities);
}
