public IReadOnlyList <IReadOnlyList <RatingDataContainer> > GetRatingValuesFromDb(
RatingsStorage ratingsStorage)
{
var results = new List <IReadOnlyList <RatingDataContainer> >();
IReadOnlyList <Rating> ratings = _ratingRepository.GetAllData();
foreach (Rating rating in ratings)
{
IReadOnlyList <ThingIdWithRating> ratingsValue =
_resultRepository.GetOrderedRatingsValue(rating.RatingId);
IReadOnlyList <RatingDataContainer> dataHandlers = ratingsValue.Select(
thingIdWithRating => new RatingDataContainer(
DataRepositoriesManager.GetProperDataHandlerById(
thingIdWithRating.ThingId,
ratingsStorage.GetTypeByRatingId(rating.RatingId)
),
thingIdWithRating.Rating,
rating.RatingId
)
).ToList();
results.Add(dataHandlers);
}
return(results);
}
/// <summary>
/// Saves ratings to the output sources.
/// </summary>
/// <returns><c>true</c> if the save was successful, <c>false</c> otherwise.</returns>
private bool SaveResults(RatingsStorage ratingsStorage)
{
bool success = false;
try
{
var ratings = DataBaseManager.GetRatingValuesFromDb(ratingsStorage);
if (OutputManager.SaveResults(ratings, string.Empty))
{
success = true;
_status = ServiceStatus.Ok;
GlobalMessageHandler.OutputMessage("Ratings was saved successfully.");
}
else
{
_status = ServiceStatus.OutputUnsaved;
GlobalMessageHandler.OutputMessage("Ratings wasn't saved.");
}
}
catch (Exception ex)
{
_logger.Error(ex, "Exception occured during output work.");
_status = ServiceStatus.OutputError;
}
return(success);
}
/// <summary>
/// Launches the whole cycle of collecting and processing data.
/// </summary>
/// <param name="storageName">Name of the input source.</param>
/// <returns>Status value depending on the result of the service.</returns>
public ServiceStatus Run(string storageName)
{
_logger.Info("Shell started work.");
// Input component work.
List <string> names = GetThingNames(storageName);
if (_status != ServiceStatus.Ok)
{
return(_status);
}
// Crawlers component work.
RequestData(names);
if (_status != ServiceStatus.Ok)
{
return(_status);
}
// Appraisers component work.
RatingsStorage ratingsStorage = AppraiseThings();
if (_status != ServiceStatus.Ok)
{
return(_status);
}
// Output component work.
SaveResults(ratingsStorage);
if (_status != ServiceStatus.Ok)
{
return(_status);
}
_logger.Info("Shell finished work successfully.");
return(_status);
}
/// <summary>
/// Processes the data in accordance with the formulas.
/// </summary>
private RatingsStorage AppraiseThings()
{
RatingsStorage ratingsStorage = null;
try
{
List <RawDataContainer> results =
DataBaseManager.GetResultsFromDbWithAdditionalInfo();
ProcessedDataContainer ratings = AppraisersManager.GetAllRatings(results);
ratingsStorage = ratings.RatingsStorage;
if (ratings.GetData().Count == 0)
{
GlobalMessageHandler.OutputMessage(
"Appraisers have not calculated ratings. Result is empty."
);
_status = ServiceStatus.Nothing;
}
else
{
DataBaseManager.DeleteResultAndRatings();
DataBaseManager.PutRatingsToDb(ratings);
GlobalMessageHandler.OutputMessage(
"Appraisers have calculated ratings successfully."
);
_status = ServiceStatus.Ok;
}
}
catch (Exception ex)
{
_logger.Error(ex, "Exception occured during appraising work.");
_status = ServiceStatus.AppraiseError;
}
return(ratingsStorage);
}
