{

internal class ClassicContentSummarizer : IContentSummarizer

{

public List<string> GetConcepts(AnalyzedDocument analyzedDocument, ISummarizerArguments summarizerArguments)

{

if (analyzedDocument.ScoredTextUnits.Count <= summarizerArguments.FilteringConceptsCap)

{

return analyzedDocument.ScoredTextUnits.Select(tus => tus.ScoredTextUnit.FormattedValue).ToList();

}

var baseFrequency = analyzedDocument.ScoredTextUnits[summarizerArguments.FilteringConceptsCap].Score;

return analyzedDocument.ScoredTextUnits.Where(tus => tus.Score >= baseFrequency).Select(tus => tus.ScoredTextUnit.FormattedValue).ToList();

}

public List<string> GetSentences(AnalyzedDocument analyzedDocument, ISummarizerArguments summarizerArguments)

{

var totalContentWordCount = analyzedDocument.ScoredSentences.Sum(s => s.ScoredSentence.TextUnits.Count);

var targetWordCount = summarizerArguments.MaxSummarySizeInPercent * totalContentWordCount / 100;

var currentWordCount = 0;

var currentSentenceIndex = 0;

var selectedSentences = new List<Sentence>();

while (currentSentenceIndex < analyzedDocument.ScoredSentences.Count - 1 &&

selectedSentences.Count < summarizerArguments.MaxSummarySentences &&

currentWordCount < targetWordCount)

{

var selectedSentence = analyzedDocument.ScoredSentences[currentSentenceIndex].ScoredSentence;

selectedSentences.Add(selectedSentence);

currentWordCount += selectedSentence.TextUnits.Count();

currentSentenceIndex += 1;

}

return selectedSentences.OrderBy(s => s.OriginalSentenceIndex).Select(s => s.OriginalSentence).ToList();

}

}

}