Class: Raif::StreamingResponses::Anthropic

Inherits:
Object
  • Object
show all
Defined in:
app/models/raif/streaming_responses/anthropic.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Anthropic

Returns a new instance of Anthropic.



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# File 'app/models/raif/streaming_responses/anthropic.rb', line 5

def initialize
  @response_json = { "content" => [], "usage" => {} }
  @finish_reason = nil
end

Instance Method Details

#current_response_json ⇒ Object 



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# File 'app/models/raif/streaming_responses/anthropic.rb', line 61

def current_response_json
  @response_json["stop_reason"] = @finish_reason
  @response_json
end

#process_streaming_event(event_type, event) ⇒ Object 



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# File 'app/models/raif/streaming_responses/anthropic.rb', line 10

def process_streaming_event(event_type, event)
  delta = nil
  index = event["index"]

  case event_type
  when "message_start"
    @response_json = event["message"]
    @response_json["content"] = []
    @response_json["usage"] ||= {}
  when "content_block_start"
    @response_json["content"][index] = event["content_block"]
    if event.dig("content_block", "type") == "tool_use"
      @response_json["content"][index]["input"] = ""
    end
  when "content_block_delta"
    delta_chunk = event["delta"]
    if delta_chunk["type"] == "text_delta"
      delta = delta_chunk["text"]
      @response_json["content"][index]["text"] += delta if delta
    elsif delta_chunk["type"] == "input_json_delta"
      @response_json["content"][index]["input"] += delta_chunk["partial_json"]
    end
  when "content_block_stop"
    content_block = @response_json["content"][index]
    if content_block&.dig("type") == "tool_use"
      begin
        content_block["input"] = JSON.parse(content_block["input"])
      rescue JSON::ParserError
        # If parsing fails, leave as a string
      end
    end
  when "message_delta"
    @finish_reason = event.dig("delta", "stop_reason")
    @response_json["usage"]["output_tokens"] = event.dig("usage", "output_tokens")
  when "message_stop"
    # message_stop carries no stop_reason of its own and always follows the message_delta
    # that does - only default to the flush-sentinel when nothing was captured, so the
    # real reason (e.g. "max_tokens") survives into current_response_json.
    @finish_reason ||= "stop"
  when "error"
    error_details = event["error"]
    raise Raif::Errors::StreamingError.new(
      message: error_details["message"],
      type: error_details["type"],
      event: event
    )
  end

  [delta, @finish_reason]
end