private StationBasedRiverMeasureViewModel ProcessReadings(StationReadings readings)
{
try
{
var riverMeasureView = new StationBasedRiverMeasureViewModel();
riverMeasureView.StationName = readings.Readings.FirstOrDefault().Measure.Station.Label;
riverMeasureView.MinValue = readings.Readings.Min(r => r.Value);
riverMeasureView.MinValueDate = readings.Readings
.Where(r => r.Value == riverMeasureView.MinValue)
.OrderByDescending(i => i.DateTime)
.ToList()[0].DateTime;
riverMeasureView.MaxValue = readings.Readings.Max(r => r.Value);
riverMeasureView.MaxValueDate = readings.Readings
.Where(r => r.Value == riverMeasureView.MaxValue)
.OrderByDescending(i => i.DateTime)
.ToList()[0].DateTime;
riverMeasureView.AverageValue = readings.Readings.Average(r => r.Value);
return(riverMeasureView);
}
catch (Exception ex)
{
_logger.LogException(ex, _config.GetDefaultLoggingPath());
return(null);
}
}
public async Task <StationBasedRiverMeasureViewModel> GetRiverWaterLevelDataAtStation(string stationReference, CommandLineViewModel commandObj)
{
try
{
var cacheKey = stationReference.ToLower() + JoinFilters(commandObj);
var processedCacheKey = cacheKey + "-processed";
var riverMeasureView = new StationBasedRiverMeasureViewModel();
riverMeasureView = (StationBasedRiverMeasureViewModel)_memoryCache.Get(processedCacheKey);
if (riverMeasureView != null)
{
return(riverMeasureView);
}
else
{
var readingsFromCache = (StationReadings)_memoryCache.Get(cacheKey);
if (readingsFromCache != null)
{
riverMeasureView = ProcessReadings(readingsFromCache);
// Add processed data to cache memory
_memoryCache.AddOrGetExisting(processedCacheKey, riverMeasureView);
return(riverMeasureView);
}
else
{
var responseData = await _externalService.GetAsync(BuildApiStationReadingsUrl(stationReference, commandObj));
var readings = JsonConvert.DeserializeObject <StationReadings>(responseData);
if (readings != null)
{
if (readings.Readings != null && readings.Readings.Any())
{
// Add readings data to cache memory
_memoryCache.AddOrGetExisting(cacheKey, readings);
riverMeasureView = ProcessReadings(readings);
// Add processed data to cache memory
_memoryCache.AddOrGetExisting(processedCacheKey, riverMeasureView);
return(riverMeasureView);
}
}
}
}
return(riverMeasureView);
}
catch (Exception ex)
{
_logger.LogException(ex, _config.GetDefaultLoggingPath());
return(null);
}
}
public void Given_ValidStationReferenceWithExistingCacheEntry_When_CallingGetRiverWaterLevelDataAtStation_Then_CachedDataReturned()
{
var resultView = new StationBasedRiverMeasureViewModel
{
AverageValue = 0.134M,
MaxValue = 3.456M,
MaxValueDate = DateTime.Today,
MinValue = 1.234M,
MinValueDate = DateTime.Today,
StationName = "Whatever"
};
_mockCache.Setup(m => m.Get(It.IsAny <string>())).Returns(resultView);
var result = _monitor.GetRiverWaterLevelDataAtStation(_stationRef, _commandObj).Result;
Assert.That(result, Is.Not.Null);
Assert.That(result, Is.EqualTo(resultView));
}
