Class: FeaturedRestaurants::AiTranslationService

Inherits:
Object
  • Object
show all
Includes:
ElasticAPM::SpanHelpers
Defined in:
app/services/featured_restaurants/ai_translation_service.rb

Overview

Service for synchronous AI translation of featured restaurant fields Uses OpenRouter API with Claude for high-quality translations

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(featured_restaurant, source_language: 'en', target_languages: [], target_fields: [], only_blank_languages: false, only_blank_fields: false) ⇒ AiTranslationService

Returns a new instance of AiTranslationService.



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# File 'app/services/featured_restaurants/ai_translation_service.rb', line 13

def initialize(featured_restaurant, source_language: 'en', target_languages: [], target_fields: [], only_blank_languages: false, only_blank_fields: false)
  @featured_restaurant = featured_restaurant
  @source_language = source_language
  @target_languages = target_languages
  @target_fields = target_fields
  @only_blank_languages = only_blank_languages
  @only_blank_fields = only_blank_fields
end

Instance Attribute Details

Returns the value of attribute featured_restaurant.



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# File 'app/services/featured_restaurants/ai_translation_service.rb', line 10

def featured_restaurant
  @featured_restaurant
end

#only_blank_fields ⇒ Object (readonly)

Returns the value of attribute only_blank_fields.



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# File 'app/services/featured_restaurants/ai_translation_service.rb', line 10

def only_blank_fields
  @only_blank_fields
end

#only_blank_languages ⇒ Object (readonly)

Returns the value of attribute only_blank_languages.



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# File 'app/services/featured_restaurants/ai_translation_service.rb', line 10

def only_blank_languages
  @only_blank_languages
end

#source_language ⇒ Object (readonly)

Returns the value of attribute source_language.



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# File 'app/services/featured_restaurants/ai_translation_service.rb', line 10

def source_language
  @source_language
end

#target_fields ⇒ Object (readonly)

Returns the value of attribute target_fields.



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# File 'app/services/featured_restaurants/ai_translation_service.rb', line 10

def target_fields
  @target_fields
end

#target_languages ⇒ Object (readonly)

Returns the value of attribute target_languages.



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# File 'app/services/featured_restaurants/ai_translation_service.rb', line 10

def target_languages
  @target_languages
end

Instance Method Details

#call ⇒ Object 



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# File 'app/services/featured_restaurants/ai_translation_service.rb', line 22

def call
  validate_inputs!

  # Determine actual languages and fields to translate
  actual_languages = determine_target_languages
  actual_fields = determine_target_fields

  return failure_result('No languages to translate') if actual_languages.blank?
  return failure_result('No fields to translate') if actual_fields.blank?

  # Filter out language-field combinations that already have content
  languages_needing_translation, fields_needing_translation = filter_existing_translations(actual_languages,
                                                                                           actual_fields)

  if languages_needing_translation.blank?
    log_already_translated(actual_languages, actual_fields)
    return success_result({}, message: 'All translations already exist')
  end

  source_texts = extract_source_texts(fields_needing_translation)
  return failure_result('No source text found for translation') if source_texts.blank?

  # Batch translations to avoid timeout: max 6 languages per batch
  all_translations = {}
  failed_batches = []

  # If more than 6 languages, batch them
  if languages_needing_translation.size > 6
    # Batch by languages (6 at a time)
    languages_needing_translation.each_slice(6).with_index do |language_batch, index|
      BUSINESS_LOGGER.info('Processing language batch', {
                             featured_restaurant_id: featured_restaurant.id,
                             batch_index: index + 1,
                             batch_size: language_batch.size,
                             languages: language_batch,
                           })

      prompt = build_translation_prompt(source_texts, language_batch)
      batch_translations = execute_translation(prompt)

      if batch_translations.present?
        all_translations.merge!(batch_translations)
        BUSINESS_LOGGER.info('Language batch completed', {
                               featured_restaurant_id: featured_restaurant.id,
                               batch_index: index + 1,
                               translated_languages: batch_translations.keys,
                             })
      end
    rescue StandardError => e
      failed_batches << "language_batch_#{index + 1}"
      log_batch_error(e, "language_batch_#{index + 1}", language_batch)
    end
  else
    # Small enough to do in one request
    prompt = build_translation_prompt(source_texts, languages_needing_translation)
    all_translations = execute_translation(prompt)
  end

  # If all batches failed, return error
  if all_translations.blank?
    error_msg = failed_batches.any? ? "All batches failed: #{failed_batches.join(', ')}" : 'No translations generated'
    return failure_result(error_msg)
  end

  # If some batches failed, log warning but continue
  if failed_batches.any?
    log_partial_success(failed_batches, all_translations.keys)
  end

  update_featured_restaurant_fields(all_translations, languages_needing_translation, fields_needing_translation)

  # Calculate how many were skipped
  skipped_count = (actual_languages.size * actual_fields.size) - (languages_needing_translation.size * fields_needing_translation.size)

  message = 'Translation completed successfully'
  message += " (#{skipped_count} already existed)" if skipped_count > 0
  message += " (#{failed_batches.size} batches failed)" if failed_batches.any?

  success_result(all_translations, message: message)
rescue StandardError => e
  handle_error(e)
end