public static void SaveForecast(OwForecast forecast)
{
if (forecast == null || forecast.list == null || !forecast.list.Any())
{
return;
}
cacheLock.EnterWriteLock();
try
{
forecast.list = forecast.list.OrderBy(x => x.dt).ToList();
var minDt = forecast.list.First().dt;
OwForecast cachedForecast = forecasts.TryGetValue(forecast.city.id, out cachedForecast) ? cachedForecast : null;
if (cachedForecast != null)
{
cachedForecast.list = cachedForecast.list.Where(x => x.dt < minDt).ToList();
// add two ordered collections - get ordered as a result
cachedForecast.list.AddRange(forecast.list);
forecast.list = cachedForecast.list;
}
var now = DateTime.UtcNow;
forecast.list = forecast.list.Where(x => x.UnixDt > now).ToList();
forecasts[forecast.city.id] = forecast;
}
finally
{
cacheLock.ExitWriteLock();
}
}
public static OwForecast GetForecast(int owCityId)
{
cacheLock.EnterReadLock();
try
{
OwForecast forecast = forecasts.TryGetValue(owCityId, out forecast) ? forecast : null;
return(forecast);
}
finally
{
cacheLock.ExitReadLock();
}
}
public OwForecast GetForecastPageData(int?owCityId = null)
{
//if (!owCityId.HasValue)
//{
// owCityId = defaultOwCityId;
//}
OwForecast owForecast = null;
var lastFetchUtc = CacheUtil.GetLastFetchUtc();
if (owCityId.HasValue)
{
if (!lastFetchUtc.HasValue || lastFetchUtc.Value < DateTime.UtcNow.AddMinutes(-minutesBetweenRequests))
{
var apiUrl = string.Format(apiUrlTemplate, owCityId);
var result = httpClient.GetAsync(apiUrl).Result;
if (result.IsSuccessStatusCode)
{
var resultString = result.Content.ReadAsStringAsync().Result;
owForecast = JsonConvert.DeserializeObject <OwForecast>(resultString);
lastFetchUtc = owForecast.FetchUtc = DateTime.UtcNow;
CacheUtil.SaveForecast(owForecast);
}
}
else
{
owForecast = CacheUtil.GetForecast(owCityId.Value);
}
}
if (owForecast == null)
{
owForecast = new OwForecast();
}
owForecast.AvailableFetchUtc = lastFetchUtc.HasValue ? lastFetchUtc.Value.AddMinutes(minutesBetweenRequests) : DateTime.UtcNow;
return(owForecast);
}
