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# frozen_string_literal: true
require 'gemini-ai'
require_relative 'base'
require_relative '../../logic/providers/google/tools'
require_relative '../../logic/providers/google/tokens'
require_relative '../../logic/helpers/hash'
require_relative '../../logic/cartridge/default'
require_relative 'tools'
module NanoBot
module Components
module Providers
class Google < Base
SAFETY_SETTINGS = %i[category threshold].freeze
SETTINGS = {
generationConfig: %i[
temperature topP topK candidateCount maxOutputTokens stopSequences
].freeze
}.freeze
attr_reader :settings
def initialize(options, settings, credentials, _environment)
@settings = settings
gemini_options = options.transform_keys { |key| key.to_s.gsub('-', '_').to_sym }
unless gemini_options.key?(:stream)
gemini_options[:stream] = Logic::Helpers::Hash.fetch(
Logic::Cartridge::Default.instance.values, %i[provider settings stream]
)
end
gemini_options[:server_sent_events] = gemini_options.delete(:stream)
@client = Gemini.new(
credentials: credentials.transform_keys { |key| key.to_s.gsub('-', '_').to_sym },
options: gemini_options
)
end
def evaluate(input, streaming, cartridge, &feedback)
messages = input[:history].map do |event|
if event[:message].nil? && event[:meta] && event[:meta][:tool_calls]
{ role: 'model',
parts: event[:meta][:tool_calls],
_meta: { at: event[:at] } }
elsif event[:who] == 'tool'
{ role: 'function',
parts: [
{ functionResponse: {
name: event[:meta][:name],
response: { name: event[:meta][:name], content: event[:message].to_s }
} }
],
_meta: { at: event[:at] } }
else
{ role: event[:who] == 'user' ? 'user' : 'model',
parts: { text: event[:message] },
_meta: { at: event[:at] } }
end
end
# TODO: Does Gemini have system messages?
%i[backdrop directive].each do |key|
next unless input[:behavior][key]
messages.prepend(
{ role: 'model',
parts: { text: 'Understood.' },
_meta: { at: Time.now } }
)
messages.prepend(
{ role: 'user',
parts: { text: input[:behavior][key] },
_meta: { at: Time.now } }
)
end
payload = { contents: messages, generationConfig: { candidateCount: 1 } }
if @settings
SETTINGS.each_key do |key|
SETTINGS[key].each do |sub_key|
if @settings.key?(key) && @settings[key].key?(sub_key)
payload[key] = {} unless payload.key?(key)
payload[key][sub_key] = @settings[key][sub_key]
end
end
end
if @settings[:safetySettings].is_a?(Array)
payload[:safetySettings] = [] unless payload.key?(:safetySettings)
@settings[:safetySettings].each do |safety_setting|
setting = {}
SAFETY_SETTINGS.each { |key| setting[key] = safety_setting[key] }
payload[:safetySettings] << setting
end
end
end
if input[:tools]
payload[:tools] = {
function_declarations: input[:tools].map { |raw| Logic::Google::Tools.adapt(raw) }
}
end
if streaming
content = ''
tools = []
stream_call_back = proc do |event, _parsed, _raw|
# TODO: How to better handle finishReason == 'OTHER'?
return if event.dig('candidates', 0, 'finishReason') == 'OTHER'
partial_content = event.dig('candidates', 0, 'content', 'parts').filter do |part|
part.key?('text')
end.map { |part| part['text'] }.join
partial_tools = event.dig('candidates', 0, 'content', 'parts').filter do |part|
part.key?('functionCall')
end
tools.concat(partial_tools) if partial_tools.size.positive?
if partial_content
content += partial_content
feedback.call(
{ should_be_stored: false,
interaction: { who: 'AI', message: partial_content } }
)
end
if event.dig('candidates', 0, 'finishReason')
# TODO: This does not have the same behavior as OpenAI, so you should
# not use it as a reference for the end of the streaming.
# Is this a bug from the Google Gemini REST API or expected behavior?
end
end
@client.stream_generate_content(
Logic::Google::Tokens.apply_policies!(cartridge, payload),
server_sent_events: true, &stream_call_back
)
if tools&.size&.positive?
feedback.call(
{ should_be_stored: true,
needs_another_round: true,
interaction: { who: 'AI', message: nil, meta: { tool_calls: tools } } }
)
Tools.apply(
cartridge, input[:tools], tools, feedback, Logic::Google::Tools
).each do |interaction|
feedback.call({ should_be_stored: true, needs_another_round: true, interaction: })
end
end
feedback.call(
{ should_be_stored: !(content.nil? || content == ''),
interaction: content.nil? || content == '' ? nil : { who: 'AI', message: content },
finished: true }
)
else
result = @client.stream_generate_content(
Logic::Google::Tokens.apply_policies!(cartridge, payload),
server_sent_events: false
)
tools = result.dig(0, 'candidates', 0, 'content', 'parts').filter do |part|
part.key?('functionCall')
end
if tools&.size&.positive?
feedback.call(
{ should_be_stored: true,
needs_another_round: true,
interaction: { who: 'AI', message: nil, meta: { tool_calls: tools } } }
)
Tools.apply(
cartridge, input[:tools], tools, feedback, Logic::Google::Tools
).each do |interaction|
feedback.call({ should_be_stored: true, needs_another_round: true, interaction: })
end
end
content = result.map do |answer|
answer.dig('candidates', 0, 'content', 'parts').filter do |part|
part.key?('text')
end.map { |part| part['text'] }.join
end.join
feedback.call(
{ should_be_stored: !(content.nil? || content.to_s.strip == ''),
interaction: content.nil? || content == '' ? nil : { who: 'AI', message: content },
finished: true }
)
end
end
end
end
end
end
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