Module: Apipurse::WrapAnthropic

Defined in:
lib/apipurse/wrap_anthropic.rb

Class Method Summary collapse

Class Method Details

.call(client, apipurse, on_track: nil) ⇒ Object 



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# File 'lib/apipurse/wrap_anthropic.rb', line 27

def self.call(client, apipurse, on_track: nil)
  messages = client.messages
  original = messages.method(:create)

  messages.define_singleton_method(:create) do |*args, **kwargs, &block|
    result = original.call(*args, **kwargs, &block)

    if result.respond_to?(:usage)
      Apipurse::WrapAnthropic.report(result, apipurse, on_track)
      result
    elsif result.respond_to?(:each)
      Apipurse::WrapAnthropic.wrap_stream(result, apipurse, on_track)
    else
      result
    end
  end

  client
end

.report(message, apipurse, on_track) ⇒ Object 



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# File 'lib/apipurse/wrap_anthropic.rb', line 47

def self.report(message, apipurse, on_track)
  usage = message.respond_to?(:usage) ? message.usage : nil
  return unless usage

  result = apipurse.track_completion(
    model: message.model,
    input_tokens: (usage.respond_to?(:input_tokens) ? usage.input_tokens : nil) || 0,
    output_tokens: (usage.respond_to?(:output_tokens) ? usage.output_tokens : nil) || 0
  )
  on_track&.call(result)
rescue StandardError
  nil
end

.wrap_stream(stream, apipurse, on_track) ⇒ Object 



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# File 'lib/apipurse/wrap_anthropic.rb', line 61

def self.wrap_stream(stream, apipurse, on_track)
  Enumerator.new do |yielder|
    model = nil
    input_tokens = 0
    output_tokens = 0

    stream.each do |event|
      event_type = event.respond_to?(:type) ? event.type : nil

      if event_type == "message_start" && event.respond_to?(:message) && event.message
        model = event.message.model
        usage = event.message.respond_to?(:usage) ? event.message.usage : nil
        if usage
          input_tokens = usage.respond_to?(:input_tokens) ? (usage.input_tokens || input_tokens) : input_tokens
          output_tokens = usage.respond_to?(:output_tokens) ? (usage.output_tokens || output_tokens) : output_tokens
        end
      end

      if event_type == "message_delta" && event.respond_to?(:usage) && event.usage
        output_tokens = event.usage.respond_to?(:output_tokens) ? (event.usage.output_tokens || output_tokens) : output_tokens
      end

      yielder << event
    end

    next unless model

    begin
      result = apipurse.track_completion(model: model, input_tokens: input_tokens, output_tokens: output_tokens)
      on_track&.call(result)
    rescue StandardError
      nil
    end
  end
end