Class: Translations::AwsTranslateService

Inherits:
Object
  • Object
show all
Includes:
AwsTranslationHelper, ElasticAPM::SpanHelpers
Defined in:
app/services/translations/aws_translate_service.rb

Overview

Service wrapper around AWS Translate for batch translating Restaurant fields. Uses conservative retry logic and instrumentation. Compatible with Ruby 2.7 / Rails 5.1.

Constant Summary collapse

BATCH_SIZE =

Keep small to respect AWS Translate limits

20
SUPPORTED_SOURCE = 
'en'
AWS_LANGUAGE_CODES =

Map internal locale symbols to AWS Translate language codes

{
  en: 'en', th: 'th', cn: 'zh-TW', zh: 'zh', es: 'es', fr: 'fr', de: 'de', ru: 'ru', ms: 'ms', ko: 'ko', ja: 'ja', id: 'id', vi: 'vi'
}.freeze
RETRY_ERRORS = 
[Aws::Translate::Errors::ThrottlingException,
Aws::Translate::Errors::ServiceUnavailableException,
Seahorse::Client::NetworkingError].freeze

Instance Method Summary collapse

Methods included from AwsTranslationHelper

#aws_translate_client

Instance Method Details

#translate_texts(texts, target_locale) ⇒ Object 



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# File 'app/services/translations/aws_translate_service.rb', line 23

def translate_texts(texts, target_locale)
  return {} if texts.blank?

  target_code = AWS_LANGUAGE_CODES[target_locale.to_sym]
  return {} if target_code.blank? || target_code == SUPPORTED_SOURCE

  client = aws_translate_client
  results = {}

  texts.each_slice(BATCH_SIZE) do |slice|
    slice.each do |key, value|
      next if value.blank?

      translated = with_retries { translate_one(client, value.to_s, target_code) }
      translated = value.to_s if translated.blank? # fallback to original to avoid empty cell
      results[key] = translated
    end
  end
  # Ensure every input key has at least original text (in case of global failure returning empty hash)
  if results.empty? || (results.keys.to_set != texts.keys.to_set)
    texts.each do |k, v|
      results[k] ||= v.to_s
    end
  end
  if defined?(BUSINESS_LOGGER)
    BUSINESS_LOGGER.info('aws_translate_batch_summary', {
                           target_locale: target_locale,
                           requested: texts.size,
                           returned: results.size,
                         })
  end
  results
rescue StandardError => e
  APMErrorHandler.report(e, context: { service: 'AwsTranslate', target_locale: target_locale })
  # Catastrophic failure: return original text map so export never blank
  texts.map { |k, v| [k, v.to_s] }.to_h
end