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73 lines
2.1 KiB
73 lines
2.1 KiB
# frozen_string_literal: true
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class TranslationService::DeepL < TranslationService
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include JsonLdHelper
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def initialize(plan, api_key)
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super()
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@plan = plan
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@api_key = api_key
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end
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def translate(text, source_language, target_language)
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form = { text: text, source_lang: source_language&.upcase, target_lang: target_language, tag_handling: 'html' }
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request(:post, '/v2/translate', form: form) do |res|
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transform_response(res.body_with_limit)
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end
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end
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def supported?(source_language, target_language)
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source_language.in?(languages('source')) && target_language.in?(languages('target'))
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end
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private
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def languages(type)
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Rails.cache.fetch("translation_service/deepl/languages/#{type}", expires_in: 7.days, race_condition_ttl: 1.minute) do
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request(:get, "/v2/languages?type=#{type}") do |res|
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# In DeepL, EN and PT are deprecated in favor of EN-GB/EN-US and PT-BR/PT-PT, so
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# they are supported but not returned by the API.
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extra = type == 'source' ? [nil] : %w(en pt)
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languages = Oj.load(res.body_with_limit).map { |language| language['language'].downcase }
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languages + extra
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end
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end
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end
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def request(verb, path, **options)
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req = Request.new(verb, "#{base_url}#{path}", **options)
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req.add_headers(Authorization: "DeepL-Auth-Key #{@api_key}")
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req.perform do |res|
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case res.code
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when 429
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raise TooManyRequestsError
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when 456
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raise QuotaExceededError
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when 200...300
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yield res
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else
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raise UnexpectedResponseError
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end
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end
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end
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def base_url
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if @plan == 'free'
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'https://api-free.deepl.com'
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else
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'https://api.deepl.com'
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end
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end
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def transform_response(str)
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json = Oj.load(str, mode: :strict)
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raise UnexpectedResponseError unless json.is_a?(Hash)
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Translation.new(text: json.dig('translations', 0, 'text'), detected_source_language: json.dig('translations', 0, 'detected_source_language')&.downcase, provider: 'DeepL.com')
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rescue Oj::ParseError
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raise UnexpectedResponseError
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end
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end
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