public async Task <IActionResult> GetRecs([FromBody] AnimeRecsInputJson input,
[FromServices] IOptionsSnapshot <Config.RecommendationsConfig> recConfig,
[FromServices] IMyAnimeListApiFactory malApiFactory, [FromServices] IAnimeRecsClientFactory recClientFactory,
[FromServices] IAnimeRecsDbConnectionFactory dbConnFactory, [FromServices] IRazorViewEngine viewEngine,
[FromServices] ITempDataProvider tempProvider)
{
if (!ModelState.IsValid)
{
AjaxError error = new AjaxError(ModelState);
_logger.LogDebug("Invalid input received for GetRecs: {0}", error.Message);
return(BadRequest(error));
}
if (input.RecSourceName == null)
{
input.RecSourceName = recConfig.Value.DefaultRecSource;
}
try
{
MalUserLookupResults userLookup = await GetUserLookupAsync(input, malApiFactory).ConfigureAwait(false);
Dictionary <int, MalListEntry> animeList = new Dictionary <int, MalListEntry>();
foreach (MyAnimeListEntry listEntry in userLookup.AnimeList)
{
animeList[listEntry.AnimeInfo.AnimeId] = new AnimeRecs.RecEngine.MAL.MalListEntry((byte?)listEntry.Score, listEntry.Status, (short)listEntry.NumEpisodesWatched);
}
Dictionary <int, MalListEntry> animeWithheld = WithholdAnime(input, animeList);
MalRecResults <IEnumerable <IRecommendation> > recResults = await GetRecommendationsAsync(input, recConfig.Value, animeList, animeWithheld, recClientFactory).ConfigureAwait(false);
GetRecsViewModel viewModel = new GetRecsViewModel(
results: recResults,
userId: userLookup.UserId,
userName: userLookup.CanonicalUserName,
userLookup: userLookup,
userAnimeList: animeList,
maximumRecommendationsToReturn: recConfig.Value.MaximumRecommendationsToReturn,
maximumRecommendersToReturn: recConfig.Value.MaximumRecommendersToReturn,
animeWithheld: animeWithheld,
dbConnectionFactory: dbConnFactory
);
RecResultsAsHtmlJson resultsJson = await GetResultHtmlAsync(viewModel, input, viewEngine, tempProvider).ConfigureAwait(false);
return(Ok(resultsJson));
}
catch (ShortCircuitException ex)
{
return(ex.Result);
}
}
private static UpdatePropertyResultViewModel createResultForConversionFailure(
UpdatePropertyModel <TEntity> updatePropertyModel, Exception ex)
{
var message = ex.Message;
var accessor = PropertyUtility.FindPropertyByName <TEntity>(updatePropertyModel.PropertyName);
var propertyName = LocalizationManager.GetHeader(accessor.InnerProperty);
var error = new AjaxError {
field = propertyName, message = message
};
var updatePropertyResultViewModel = new UpdatePropertyResultViewModel
{
Success = false,
};
updatePropertyResultViewModel.Errors.Add(error);
return(updatePropertyResultViewModel);
}
protected async Task <JsonResult> IfModelStateValidAjaxAsync(Func <Task <object> > func)
{
object data;
if (ModelState.IsValid)
{
try
{
data = await func();
}
catch (Exception ex)
{
data = ex;
}
}
else
{
data = new AjaxError(ViewData);
}
return(Json(data));
}
private async Task <MalUserLookupResults> GetUserLookupAsync(AnimeRecsInputJson input, IMyAnimeListApiFactory malApiFactory)
{
using (IMyAnimeListApi malApi = malApiFactory.GetMalApi())
{
_logger.LogInformation("Getting MAL list for user {0}.", input.MalName);
MalUserLookupResults userLookup;
try
{
userLookup = await malApi.GetAnimeListForUserAsync(input.MalName).ConfigureAwait(false);
_logger.LogInformation("Got MAL list for user {0}.", input.MalName);
return(userLookup);
}
catch (MalUserNotFoundException)
{
_logger.LogInformation("User {0} not found.", input.MalName);
AjaxError error = new AjaxError(AjaxError.NoSuchMALUser, "No such MAL user.");
JsonResult result = Json(error);
result.StatusCode = 404;
throw new ShortCircuitException(result);
}
}
}
private async Task <MalRecResults <IEnumerable <IRecommendation> > > GetRecommendationsAsync(AnimeRecsInputJson input,
Config.RecommendationsConfig recConfig, Dictionary <int, MalListEntry> animeList,
Dictionary <int, MalListEntry> animeWithheld, IAnimeRecsClientFactory recClientFactory)
{
int numRecsToTryToGet = recConfig.MaximumRecommendationsToReturn;
if (animeWithheld.Count > 0)
{
// Get rating prediction information about all anime if in debug mode and withholding anime.
// For all currently implemented algorithms, this does not cause a performance problem.
numRecsToTryToGet = 100000;
}
using (AnimeRecsClient recClient = recClientFactory.GetClient(input.RecSourceName))
{
MalRecResults <IEnumerable <IRecommendation> > recResults;
try
{
if (input.GoodPercentile != null)
{
decimal targetFraction = input.GoodPercentile.Value / 100;
_logger.LogInformation("Querying rec source {0} for {1} recommendations for {2} using target of top {3}%.",
input.RecSourceName, numRecsToTryToGet, input.MalName, targetFraction);
recResults = await recClient.GetMalRecommendationsWithFractionTargetAsync(animeList,
input.RecSourceName, numRecsToTryToGet, targetFraction,
TimeSpan.FromMilliseconds(recConfig.TimeoutMilliseconds), CancellationToken.None).ConfigureAwait(false);
}
else if (input.GoodCutoff != null)
{
_logger.LogInformation("Querying rec source {0} for {1} recommendations for {2} using target of {3}.",
input.RecSourceName, numRecsToTryToGet, input.MalName, input.GoodCutoff.Value);
recResults = await recClient.GetMalRecommendationsAsync(animeList, input.RecSourceName,
numRecsToTryToGet, input.GoodCutoff.Value, TimeSpan.FromMilliseconds(recConfig.TimeoutMilliseconds),
CancellationToken.None).ConfigureAwait(false);
}
else
{
decimal targetFraction = recConfig.DefaultTargetPercentile / 100;
_logger.LogInformation("Querying rec source {0} for {1} recommendations for {2} using default target of top {3}%.",
input.RecSourceName, numRecsToTryToGet, input.MalName, targetFraction);
recResults = await recClient.GetMalRecommendationsWithFractionTargetAsync(animeList,
input.RecSourceName, numRecsToTryToGet, targetFraction,
TimeSpan.FromMilliseconds(recConfig.TimeoutMilliseconds), CancellationToken.None)
.ConfigureAwait(false);
}
}
catch (AnimeRecs.RecService.DTO.RecServiceErrorException ex)
{
if (ex.Error.ErrorCode == AnimeRecs.RecService.DTO.ErrorCodes.Maintenance)
{
_logger.LogInformation("Could not service recommendation request for {0}. The rec service is currently undergoing maintenance.",
input.MalName);
AjaxError error = new AjaxError(AjaxError.InternalError, "The site is currently undergoing scheduled maintenance. Check back in a few minutes.");
JsonResult result = Json(error);
result.StatusCode = 500;
throw new ShortCircuitException(result);
}
else
{
throw;
}
}
_logger.LogInformation("Got results from rec service for {0}.", input.MalName);
return(recResults);
}
}
private IActionResult ApiError(int statusCode, Exception ex)
{
AjaxError error = new AjaxError(AjaxError.InternalError, "Sorry, something went wrong when processing your request.");
return(StatusCode(statusCode, error));
}
public static AjaxContinuation AddError(this AjaxContinuation ajaxContinuation, AjaxError ajaxError)
{
if (ajaxError == null)
{
return(ajaxContinuation);
}
ajaxContinuation.Errors.Add(ajaxError);
return(ajaxContinuation);
}
private MalUserLookupResults GetUserLookup(AnimeRecsInputJson input)
{
using (IMyAnimeListApi malApi = _malApiFactory.GetMalApi())
{
Logging.Log.InfoFormat("Getting MAL list for user {0}.", input.MalName);
MalUserLookupResults userLookup;
try
{
userLookup = malApi.GetAnimeListForUser(input.MalName);
Logging.Log.InfoFormat("Got MAL list for user {0}.", input.MalName);
return userLookup;
}
catch (MalUserNotFoundException)
{
Logging.Log.InfoFormat("User {0} not found.", input.MalName);
AjaxError error = new AjaxError(AjaxError.NoSuchMALUser, "No such MAL user.");
Response response = Response.AsJson(error, HttpStatusCode.BadRequest);
throw new ShortCircuitException(response);
}
}
}
private object GetRecs(dynamic arg)
{
Logging.Log.Info("Started processing GetRecs request.");
AnimeRecsInputJson input;
try
{
input = this.BindAndValidate<AnimeRecsInputJson>();
}
catch (JsonSerializationException ex)
{
AjaxError error = new AjaxError(AjaxError.InvalidInput, ex.Message);
return Response.AsJson(error, HttpStatusCode.BadRequest);
}
if (!ModelValidationResult.IsValid)
{
string errorString = ModelBindingHelpers.ConstructErrorString(ModelValidationResult.Errors);
AjaxError error = new AjaxError(AjaxError.InvalidInput, errorString);
return Response.AsJson(error, HttpStatusCode.BadRequest);
}
try
{
return DoGetRecs(input);
}
catch (ShortCircuitException earlyResponse)
{
return earlyResponse.Response;
}
}
private MalRecResults<IEnumerable<IRecommendation>> GetRecommendations(AnimeRecsInputJson input, Dictionary<int, MalListEntry> animeList, Dictionary<int, MalListEntry> animeWithheld)
{
int numRecsToTryToGet = _config.MaximumRecommendationsToReturn;
if (animeWithheld.Count > 0)
{
// Get rating prediction information about all anime if in debug mode and withholding anime.
// For all currently implemented algorithms, this does not cause a performance problem.
numRecsToTryToGet = 100000;
}
using (AnimeRecsClient recClient = _recClientFactory.GetClient(input.RecSourceName))
{
MalRecResults<IEnumerable<IRecommendation>> recResults;
try
{
if (input.GoodPercentile != null)
{
Logging.Log.InfoFormat("Querying rec source {0} for {1} recommendations for {2} using target of top {3}%.",
input.RecSourceName, numRecsToTryToGet, input.MalName, input.GoodPercentile.Value);
recResults = recClient.GetMalRecommendationsWithPercentileTarget(animeList, input.RecSourceName, numRecsToTryToGet,
input.GoodPercentile.Value);
}
else if (input.GoodCutoff != null)
{
Logging.Log.InfoFormat("Querying rec source {0} for {1} recommendations for {2} using target of {3}.",
input.RecSourceName, numRecsToTryToGet, input.MalName, input.GoodCutoff.Value);
recResults = recClient.GetMalRecommendations(animeList, input.RecSourceName, numRecsToTryToGet,
input.GoodCutoff.Value);
}
else
{
Logging.Log.InfoFormat("Querying rec source {0} for {1} recommendations for {2} using default target of top {3}%.",
input.RecSourceName, numRecsToTryToGet, input.MalName, AppGlobals.Config.DefaultTargetPercentile);
recResults = recClient.GetMalRecommendationsWithPercentileTarget(animeList, input.RecSourceName, numRecsToTryToGet,
AppGlobals.Config.DefaultTargetPercentile);
}
}
catch (AnimeRecs.RecService.DTO.RecServiceErrorException ex)
{
if (ex.Error.ErrorCode == AnimeRecs.RecService.DTO.ErrorCodes.Maintenance)
{
Logging.Log.InfoFormat("Could not service recommendation request for {0}. The rec service is currently undergoing maintenance.",
input.MalName);
AjaxError error = new AjaxError(AjaxError.InternalError, "The site is currently undergoing scheduled maintenance. Check back in a few minutes.");
Response response = Response.AsJson(error, HttpStatusCode.InternalServerError);
throw new ShortCircuitException(response);
}
else
{
throw;
}
}
Logging.Log.InfoFormat("Got results from rec service for {0}.", input.MalName);
return recResults;
}
}
