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# frozen_string_literal: true
class TranslationService::LibreTranslate < TranslationService
def initialize(base_url, api_key)
super()
@base_url = base_url
@api_key = api_key
end
def translate(text, source_language, target_language)
request(text, source_language, target_language).perform do |res|
case res.code
when 429
raise TooManyRequestsError
when 403
raise QuotaExceededError
when 200...300
transform_response(res.body_with_limit, source_language)
else
raise UnexpectedResponseError
end
end
end
private
def request(text, source_language, target_language)
body = Oj.dump(q: text, source: source_language.presence || 'auto', target: target_language, format: 'html', api_key: @api_key)
req = Request.new(:post, "#{@base_url}/translate", body: body)
req.add_headers('Content-Type': 'application/json')
req
end
def transform_response(str, source_language)
json = Oj.load(str, mode: :strict)
raise UnexpectedResponseError unless json.is_a?(Hash)
Translation.new(text: json['translatedText'], detected_source_language: source_language, provider: 'LibreTranslate')
rescue Oj::ParseError
raise UnexpectedResponseError
end
end
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