Class: Spectre::Gemini::Completions

Inherits:
Object
  • Object
show all
Defined in:
lib/spectre/gemini/completions.rb

Constant Summary collapse

API_URL =

Using Google’s OpenAI-compatible endpoint

'https://generativelanguage.googleapis.com/v1beta/openai/chat/completions'
DEFAULT_MODEL = 
'gemini-2.5-flash'
DEFAULT_TIMEOUT = 
60

Class Method Summary collapse

Class Method Details

.create(messages:, model: DEFAULT_MODEL, json_schema: nil, tools: nil, **args) ⇒ Hash

Class method to generate a completion based on user messages and optional tools

Parameters:

  • messages (Array<Hash>) —

    The conversation messages, each with a role and content

  • model (String) (defaults to: DEFAULT_MODEL) —

    The model to be used for generating completions, defaults to DEFAULT_MODEL

  • json_schema (Hash, nil) (defaults to: nil) —

    An optional JSON schema to enforce structured output (OpenAI-compatible “response_format”)

  • tools (Array<Hash>, nil) (defaults to: nil) —

    An optional array of tool definitions for function calling

  • args (Hash, nil) —

    optional arguments like read_timeout and open_timeout. Provide max_tokens at the top level only.

Returns:

  • (Hash) —

    The parsed response including any function calls or content

Raises:

  • (APIKeyNotConfiguredError) —

    If the API key is not set

  • (RuntimeError) —

    For general API errors or unexpected issues



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# File 'lib/spectre/gemini/completions.rb', line 25

def self.create(messages:, model: DEFAULT_MODEL, json_schema: nil, tools: nil, **args)
  api_key = Spectre.gemini_configuration&.api_key
  raise APIKeyNotConfiguredError, "API key is not configured" unless api_key

  validate_messages!(messages)

  uri = URI(API_URL)
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = true
  http.read_timeout = args.fetch(:read_timeout, DEFAULT_TIMEOUT)
  http.open_timeout = args.fetch(:open_timeout, DEFAULT_TIMEOUT)

  request = Net::HTTP::Post.new(uri.path, {
    'Content-Type' => 'application/json',
    'Authorization' => "Bearer #{api_key}"
  })

  max_tokens = args[:max_tokens]
  request.body = generate_body(messages, model, json_schema, max_tokens, tools).to_json
  response = http.request(request)

  unless response.is_a?(Net::HTTPSuccess)
    raise "Gemini API Error: #{response.code} - #{response.message}: #{response.body}"
  end

  parsed_response = JSON.parse(response.body)

  handle_response(parsed_response)
rescue JSON::ParserError => e
  raise "JSON Parse Error: #{e.message}"
end