public void SentimentAnalysis_Negative_Sentiment()
{
string textToAnalyse = @"@talk2GLOBE Why can't I use my postpaid line as a billing method for Google Play?";
SentimentScore score = Analyze(textToAnalyse);
Assert.AreEqual(SentimentScore.Negative, score);
}
public void SentimentAnalysis_Neutral_Sentiment()
{
string textToAnalyse = @"Maven Wave Partners is looking for: Google Deployment Lead https://t.co/LJPPQL6pkV #job";
SentimentScore score = Analyze(textToAnalyse);
Assert.AreEqual(SentimentScore.Neutral, score);
}
// private static readonly HttpClient SingleClient = new HttpClient();
// If your activity returns a value, derive from CodeActivity<TResult>
// and return the value from the Execute method.
protected override void Execute(NativeActivityContext context)
{
var text = Text.Get(context);
string filePath = File_Path.Get(context);
string apiKey = API_KEY.Get(context);
if (filePath != null)
{
var credential = GoogleCredential.FromFile(filePath).CreateScoped(LanguageServiceClient.DefaultScopes);
var channel = new Grpc.Core.Channel(LanguageServiceClient.DefaultEndpoint.ToString(), credential.ToChannelCredentials());
var client = LanguageServiceClient.Create(channel);
var response = client.AnalyzeSentiment(new Document()
{
Content = text,
Type = Document.Types.Type.PlainText
});
var sentiment = response.DocumentSentiment;
// Console.WriteLine($"Score: {sentiment.Score}");
// Console.WriteLine($"Magnitude: {sentiment.Magnitude}");
SentimentScore.Set(context, sentiment.Score);
SentimentMagnitude.Set(context, sentiment.Magnitude);
}
else if (apiKey != null)
{
// @TODO Authentication using API Key [Work in progress]
var nlp_base_url = "https://language.googleapis.com/v1beta2/";
var operation = "documents:analyzeSentiment";
var key = "?key=" + API_KEY.Get(context);
var request_url = nlp_base_url + operation + key;
object content = new
{
document = new
{
content = text,
type = "PLAIN_TEXT"
},
encodingType = "UTF8"
};
Task <(HttpResponseMessage, String)> response_message = Task.Run(() => PostBasicAsync(request_url, content));
response_message.Wait();
(HttpResponseMessage result_json, String stringContent) = response_message.Result;
// string request_content = stringContent.ReadAsStringAsync().Result;
// ContentBody.Set(context, "\nStringContent - \n" + stringContent);
GoogleNLPResponseMessage.Set(context, result_json);
}
}
public void SentimentAnalysis_Positive_Sentiment()
{
string textToAnalyse = @"That was..Interesting. I mean I love Google photos .. but yes.. interesting, especially when Japan is mostly iPhone. https://t.co/0WsJnGzUyy";
SentimentScore score = Analyze(textToAnalyse);
Assert.AreEqual(SentimentScore.Positive, score);
}
private static SentimentScoreResponse Map(SentimentScore score)
{
return new SentimentScoreResponse
{
Label = score.Label,
Score = score.Score?.ToDictionary(x => x.Key, x => x.Value)
};
}
static SentimentScore Analyze(string textToAnalyze)
{
SentimentScore ret = new SentimentScore();
try
{
string url = string.Format("http://www.sentiment140.com/api/classify?text={0}",
HttpUtility.UrlEncode(textToAnalyze, Encoding.UTF8));
var response = HttpWebRequest.Create(url).GetResponse();
using (var streamReader = new StreamReader(response.GetResponseStream()))
{
try
{
// Read from source
var line = streamReader.ReadLine();
// Parse
var jObject = JObject.Parse(line);
int polarity = jObject.SelectToken("results", true).SelectToken("polarity", true).Value <int>();
switch (polarity)
{
case 0: ret.Score = SentimentScore.score.Negative;
ret.Sentiment = "Negative";
break;
case 4: ret.Score = SentimentScore.score.Positive;
ret.Sentiment = "Positive";
break;
// 2 or others
default: ret.Score = SentimentScore.score.Neutral;
ret.Sentiment = "Neutral";
break;
}
}
catch (Exception)
{
ret.Score = SentimentScore.score.Neutral;
ret.Sentiment = "Neutral";
return(ret);
}
}
}
catch (Exception e)
{
Console.WriteLine("Sentiment calculation FAILED with:/n{0}", e);
ret.Score = SentimentScore.score.Neutral;
ret.Sentiment = "Neutral";
return(ret);
}
return(ret);
}
public static Dictionary <string, double> GetScore(this SentimentScore sentimentScore)
{
var map = new Dictionary <string, double>
{
{ KnownSentiment.Positive, sentimentScore.Positive },
{ KnownSentiment.Negative, sentimentScore.Negative },
{ KnownSentiment.Mixed, sentimentScore.Mixed },
{ KnownSentiment.Neutral, sentimentScore.Neutral }
};
return(map);
}
public async Task <List <SentimentScore> > AnalyzeMessage(List <SentimentMessage> messages)
{
var inputs = new List <MultiLanguageInput>();
var i = 0;
foreach (var msg in messages)
{
inputs.Add(new MultiLanguageInput("en", (i++).ToString(), msg.Content));
}
SentimentBatchResult result = await client.SentimentAsync(new MultiLanguageBatchInput(inputs));
List <SentimentScore> output = new List <SentimentScore>();
i = 0;
if (result?.Documents != null)
{
foreach (var document in result.Documents)
{
var latestScore = new SentimentScore()
{
Author = messages[i].Author,
AuthorId = messages[i].AuthorId,
ChannelId = messages[i].ChannelId,
Score = result.Documents[i].Score ?? -1,
Timestamp = messages[i].Timestamp
};
i++;
output.Add(latestScore);
Console.WriteLine($"Score logged: {latestScore.Author}: {latestScore.Score}. Channel: {latestScore.ChannelId}, Timestamp: {latestScore.Timestamp}");
}
}
else
{
Console.WriteLine($"Invalid results from sentiment service: {result?.Documents}");
}
return(output);
}
public SentimentHistoryService(Config config)
{
this.semaphore = new SemaphoreSlim(1);
this.scores = new Dictionary <string, LinkedList <SentimentScore> >();
this.config = config;
semaphore.Wait();
try
{
// bootstrap existing data
if (File.Exists(DataFilePath))
{
var dbLines = File.ReadAllLines(DataFilePath);
foreach (var line in dbLines)
{
var parts = line.Split('\t');
if (parts.Length == 5)
{
var score = new SentimentScore()
{
Author = parts[0],
AuthorId = ulong.Parse(parts[1]),
ChannelId = ulong.Parse(parts[2]),
Score = double.Parse(parts[3]),
Timestamp = DateTime.Parse(parts[4])
};
var list = this.CreateListIfNeeded(score.ChannelId.ToString());
list.AddLast(score);
}
else
{
Console.WriteLine($"Invalid bootstrap data in {DataFilePath}, data: {line}");
}
}
}
}
finally
{
semaphore.Release();
}
}
/// <summary>
/// Creates new instance of <see cref="Sentiment"/>.
/// </summary>
/// <param name="score">Sentiment score.</param>
/// <param name="probability">Sentiment probability (certainty).</param>
public Sentiment(SentimentScore score, double probability)
{
Score = score;
Probability = probability;
}
static SentimentScore Analyze(string textToAnalyze)
{
SentimentScore ret = new SentimentScore();
try
{
string url = string.Format("http://www.sentiment140.com/api/classify?text={0}",
HttpUtility.UrlEncode(textToAnalyze, Encoding.UTF8));
var response = HttpWebRequest.Create(url).GetResponse();
using (var streamReader = new StreamReader(response.GetResponseStream()))
{
try
{
// Read from source
var line = streamReader.ReadLine();
// Parse
var jObject = JObject.Parse(line);
int polarity = jObject.SelectToken("results", true).SelectToken("polarity", true).Value<int>();
switch (polarity)
{
case 0: ret.Score = SentimentScore.score.Negative;
ret.Sentiment = "Negative";
break;
case 4: ret.Score = SentimentScore.score.Positive;
ret.Sentiment = "Positive";
break;
// 2 or others
default: ret.Score = SentimentScore.score.Neutral;
ret.Sentiment = "Neutral";
break;
}
}
catch (Exception)
{
ret.Score = SentimentScore.score.Neutral;
ret.Sentiment = "Neutral";
return ret;
}
}
}
catch (Exception e)
{
Console.WriteLine("Sentiment calculation FAILED with:/n{0}", e);
ret.Score = SentimentScore.score.Neutral;
ret.Sentiment = "Neutral";
return ret;
}
return ret;
}
