private static async Task <float> ScoreFeedAsync(IFeedSubscription feedSubscription)
{
float score = 0;
var requestUrl = new Uri("https://viewpointreaderwebapi.azurewebsites.net/api/subscriptions/scorefeed");
using (var request = new HttpRequestMessage(HttpMethod.Post, requestUrl))
{
using (var stringContent =
new StringContent(JsonConvert.SerializeObject(feedSubscription), Encoding.UTF8, "application/json"))
{
var httpClient = new HttpClient();
request.Content = stringContent;
var responseMessage = await httpClient.SendAsync(request);
if (responseMessage.IsSuccessStatusCode)
{
float.TryParse(await responseMessage.Content.ReadAsStringAsync(), out score);
}
}
}
return(score);
}
public async Task <float> ScoreFeed(IFeedSubscription feedSubscription)
{
if (!feedSubscription.KeyPhrases.Any())
{
return(0);
}
await LoadModel();
var testFeedData = new FeedData
{
KeyPhrases = feedSubscription.KeyPhrases.ToArray()
};
try
{
MLContext mlContext = new MLContext();
var predictionEngine =
mlContext.Model.CreatePredictionEngine <FeedData, FeedRecommendation>(_trainedModel);
var prediction = predictionEngine.Predict(testFeedData);
return(prediction.Score);
}
catch (Exception e)
{
Console.WriteLine(e);
}
return(0);
}
private FeedSubscriptionDo TransformToSubscriptionDo(IFeedSubscription feedSubscription)
{
var feedSubscriptionDo = new FeedSubscriptionDo
{
Id = feedSubscription.Id,
Title = feedSubscription.Title,
Description = feedSubscription.Description,
Url = feedSubscription.Url,
ImageUrl = feedSubscription.ImageUrl,
LastUpdated = feedSubscription.LastUpdated,
KeyPhrases = BuildCommaDelimitedStringFromStringList(feedSubscription.KeyPhrases),
SubscribedDate = feedSubscription.SubscribedDate,
};
return(feedSubscriptionDo);
}
private FeedSubscriptionEntity TransformToFeedSubscriptionEntity(IFeedSubscription feedSubscription)
{
var feedSubscriptionEntity = new FeedSubscriptionEntity
{
PartitionKey = feedSubscription.Id.ToString(),
RowKey = feedSubscription.Title,
Description = feedSubscription.Description,
Url = feedSubscription.Url,
ImageUrl = feedSubscription.ImageUrl,
LastUpdated = feedSubscription.LastUpdated,
KeyPhrases = BuildCommaDelimitedStringFromStringList(feedSubscription.KeyPhrases),
SubscribedDate = feedSubscription.SubscribedDate,
};
return(feedSubscriptionEntity);
}
public async Task <int> SaveFeedSubscriptionAsync(IFeedSubscription feedSubscription)
{
var feedSubscriptionDo = TransformToSubscriptionDo(feedSubscription);
if (feedSubscription.Id > 0)
{
await _databaseConnection.UpdateAsync(feedSubscriptionDo);
}
else
{
await _databaseConnection.InsertAsync(feedSubscriptionDo);
}
if (feedSubscription.FeedItems.Any())
{
await SaveFeedItems(feedSubscription.FeedItems, feedSubscriptionDo.Id);
}
return(feedSubscriptionDo.Id);
}
public async Task <int> SaveFeedSubscriptionAsync(IFeedSubscription feedSubscription)
{
var newFeedSubscriptionEntity = TransformToFeedSubscriptionEntity(feedSubscription);
if (_feedSubscriptionsTable == null)
{
_feedSubscriptionsTable = await CreateTableAsync(_feedSubscriptionsTableName);
}
try
{
TableOperation insertMergeOperation = TableOperation.InsertOrMerge(newFeedSubscriptionEntity);
TableResult result = await _feedSubscriptionsTable.ExecuteAsync(insertMergeOperation);
await UpdateModel();
return(result.HttpStatusCode);
}
catch (StorageException e)
{
Console.WriteLine(e.Message);
throw;
}
}
public Task <int> DeleteFeedSubscriptionAsync(IFeedSubscription feedSubscription)
{
return(_databaseConnection.DeleteAsync(TransformToSubscriptionDo(feedSubscription)));
}
public Task <int> DeleteFeedSubscriptionAsync(IFeedSubscription feedSubscription)
{
throw new NotImplementedException();
}
