public IEnumerable <string> SearchAsYouType(string content)
{
ElasticClient client = ElasticClientConnection.GetElasticClient();
var searchResponse = client.Search <Note>(s => s
.Index("notes_sayt")
.Query(q => q
.MultiMatch(mm => mm
.Query(content)
.Type(TextQueryType.BoolPrefix)
.Fields(f => f.Field("content").Field("content._2gram").Field("content._3gram"))
.Fuzziness(Fuzziness.Auto)
)
)
);
var resultsList = new List <string>();
foreach (var note in searchResponse.Hits)
{
resultsList.Add(note.Source.Content + " (Score: " + note.Score + ")");
}
return(resultsList);
}
public bool InsertNote(string content)
{
ElasticClient client = ElasticClientConnection.GetElasticClient();
var note = new Note(content);
var indexResponse = client.IndexDocument(note);
if (indexResponse.IsValid)
{
return(true);
}
return(false);
}
public IEnumerable <string> GetAllNotes()
{
ElasticClient client = ElasticClientConnection.GetElasticClient();
var searchResponse = client.Search <Note>(s => s
.MatchAll()
);
var resultsList = new List <string>();
foreach (var note in searchResponse.Documents)
{
resultsList.Add(note.Content);
}
return(resultsList);
}
public IEnumerable <string> GetNotes(string content)
{
ElasticClient client = ElasticClientConnection.GetElasticClient();
var searchResponse = client.Search <Note>(s => s
.Query(q => q
.Match(m => m
.Field(f => f.Content)
.Fuzziness(Fuzziness.Auto)
.Operator(Operator.Or)
.Query(content)
) || q
.Match(m => m
.Field(f => f.Content)
.Fuzziness(Fuzziness.Auto)
.Operator(Operator.And)
.Query(content)
) || q
.MatchPhrase(mp => mp
.Field(f => f.Content)
.Boost(2)
.Query(content)
)
)
);
//var searchResponse = client.Search<Note>(s => s
// .Size(15)
// .Query(q => q
// .Match(m => m
// .Field(f => f.Content)
// .Fuzziness(Fuzziness.Auto)
// .Query(content)
// )
// )
//);
var resultsList = new List <string>();
foreach (var note in searchResponse.Hits)
{
resultsList.Add(note.Source.Content + " (Score: " + note.Score + ")");
}
return(resultsList);
}
/// <summary>
/// Updates document's popularity by increasing specific documents rank by 1
/// </summary>
/// <param name="noteId">ID of the ES document</param>
/// <returns>Returns true if update successful</returns>
public bool UpdateNote(string noteId)
{
ElasticClient client = ElasticClientConnection.GetElasticClient();
var updateResponse = client.Update <Note>(noteId, u => u
.Script(script => script
.Source("ctx._source.rank += params.rank")
.Params(p => p
.Add("rank", 1)
)
)
.RetryOnConflict(5)
);
if (updateResponse.IsValid)
{
return(true);
}
return(false);
}
/// <summary>
/// Main search method for matching text with documents in the ES index.
/// </summary>
/// <param name="content">text that needs to be searched</param>
/// <returns>Returns list of 10 most relevant notes</returns>
public IEnumerable <Note> GetNotes(string content)
{
ElasticClient client = ElasticClientConnection.GetElasticClient();
var searchResponse = client.Search <Note>(s => s
.Query(q => q
.Match(m => m
.Field(f => f.Content)
.Fuzziness(Fuzziness.Auto)
.Operator(Operator.Or)
.Query(content)
) || q
.Match(m => m
.Field(f => f.Content)
.Fuzziness(Fuzziness.Auto)
.Operator(Operator.And)
.Query(content)
) || q
.MatchPhrase(mp => mp
.Field(f => f.Content)
.Boost(2)
.Query(content)
) || q
.RankFeature(rf => rf
.Field(f => f.Rank)
)
)
);
List <Note> resultList = new List <Note>();
foreach (var note in searchResponse.Hits)
{
resultList.Add(new Note {
Id = note.Id, Content = note.Source.Content, Score = note.Score.ToString()
});
}
return(resultList);
}
/// <summary>
/// This method checks if the note exists in the ES index. If so, it updates the documents popularity, if not, it
/// creates a new document in index.
/// </summary>
/// <param name="content">Content of the document that needs to be posted</param>
/// <returns></returns>
public bool PostNote(string content)
{
ElasticClient client = ElasticClientConnection.GetElasticClient();
char[] charsToTrim = { ',', '.', ' ', '@', ';', '!', '?', '"', ':' };
string trimmedContent = content.Trim(charsToTrim);
var searchResponse = client.Search <Note>(s => s
.Query(q => q
.Term(t => t
.Field(f => f.Content.Suffix("raw"))
.Value(trimmedContent)
)
)
);
if (searchResponse.IsValid)
{
if (searchResponse.Hits.Count > 0)
{
if (UpdateNote(searchResponse.Hits.FirstOrDefault().Id))
{
return(true);
}
}
else
{
if (InsertNote(trimmedContent))
{
return(true);
}
}
}
return(false);
}
