Class: SentimentInsights::Clients::KeyPhrases::AwsClient

Inherits:
Object
  • Object
show all
Defined in:
lib/sentiment_insights/clients/key_phrases/aws_client.rb

Constant Summary collapse

MAX_BATCH_SIZE = 
25

Instance Method Summary collapse

Constructor Details

#initialize(region: 'us-east-1') ⇒ AwsClient

Returns a new instance of AwsClient.



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# File 'lib/sentiment_insights/clients/key_phrases/aws_client.rb', line 10

def initialize(region: 'us-east-1')
  @comprehend = Aws::Comprehend::Client.new(region: region)
  @logger = Logger.new($stdout)
end

Instance Method Details

#extract_batch(entries, question: nil, key_phrase_prompt: nil, sentiment_prompt: nil) ⇒ Object 



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# File 'lib/sentiment_insights/clients/key_phrases/aws_client.rb', line 15

def extract_batch(entries, question: nil, key_phrase_prompt: nil, sentiment_prompt: nil)
  responses = []
  phrase_map = Hash.new { |h, k| h[k] = [] }

  # Split into batches for AWS Comprehend
  entries.each_slice(MAX_BATCH_SIZE).with_index do |batch, batch_idx|
    texts = batch.map { |e| e[:answer].to_s.strip[0...5000] }

    begin
      phrase_resp = @comprehend.batch_detect_key_phrases({
                                                           text_list: texts,
                                                           language_code: 'en'
                                                         })

      sentiment_resp = @comprehend.batch_detect_sentiment({
                                                            text_list: texts,
                                                            language_code: 'en'
                                                          })

      phrase_resp.result_list.each_with_index do |phrase_result, idx|
        sentiment_result = sentiment_resp.result_list.find { |s| s.index == phrase_result.index }
        sentiment_label = sentiment_result&.sentiment&.downcase&.to_sym || :neutral

        entry_index = (batch_idx * MAX_BATCH_SIZE) + idx
        entry = entries[entry_index]
        sentence = texts[idx]
        response_id = "r_#{entry_index + 1}"

        responses << {
          id: response_id,
          sentence: sentence,
          sentiment: sentiment_label,
          segment: entry[:segment] || {}
        }

        phrases = phrase_result.key_phrases.map { |p| p.text.downcase.strip }.uniq
        phrases.each { |phrase| phrase_map[phrase] << response_id }
      end

      phrase_resp.error_list.each do |error|
        @logger.warn "AWS KeyPhrase error at index #{error.index}: #{error.error_code}"
      end

      sentiment_resp.error_list.each do |error|
        @logger.warn "AWS Sentiment error at index #{error.index}: #{error.error_code}"
      end

    rescue Aws::Comprehend::Errors::ServiceError => e
      @logger.error "AWS Comprehend batch error: #{e.message}"
      batch.each_with_index do |entry, i|
        entry_index = (batch_idx * MAX_BATCH_SIZE) + i
        responses << {
          id: "r_#{entry_index + 1}",
          sentence: entry[:answer],
          sentiment: :neutral,
          segment: entry[:segment] || {}
        }
      end
    end
  end

  phrases = phrase_map.map do |phrase, ref_ids|
    {
      phrase: phrase,
      mentions: ref_ids.uniq,
      summary: nil
    }
  end

  { phrases: phrases, responses: responses }
end