mirror of
https://github.com/mastodon/mastodon
synced 2024-11-25 07:36:31 +09:00
113 lines
3.3 KiB
Ruby
113 lines
3.3 KiB
Ruby
# frozen_string_literal: true
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class TranslateStatusService < BaseService
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CACHE_TTL = 1.day.freeze
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include ERB::Util
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include FormattingHelper
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def call(status, target_language)
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@status = status
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@source_texts = source_texts
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@target_language = target_language
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raise Mastodon::NotPermittedError unless permitted?
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status_translation = Rails.cache.fetch("v2:translations/#{@status.language}/#{@target_language}/#{content_hash}", expires_in: CACHE_TTL) do
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translations = translation_backend.translate(@source_texts.values, @status.language, @target_language)
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build_status_translation(translations)
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end
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status_translation.status = @status
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status_translation
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end
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private
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def translation_backend
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@translation_backend ||= TranslationService.configured
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end
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def permitted?
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return false unless @status.distributable? && TranslationService.configured?
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languages[@status.language]&.include?(@target_language)
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end
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def languages
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Rails.cache.fetch('translation_service/languages', expires_in: 7.days, race_condition_ttl: 1.hour) { TranslationService.configured.languages }
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end
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def content_hash
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Digest::SHA256.base64digest(@source_texts.transform_keys { |key| key.respond_to?(:id) ? "#{key.class}-#{key.id}" : key }.to_json)
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end
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def source_texts
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texts = {}
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texts[:content] = wrap_emoji_shortcodes(status_content_format(@status)) if @status.content.present?
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texts[:spoiler_text] = wrap_emoji_shortcodes(html_escape(@status.spoiler_text)) if @status.spoiler_text.present?
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@status.preloadable_poll&.loaded_options&.each do |option|
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texts[option] = wrap_emoji_shortcodes(html_escape(option.title))
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end
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@status.media_attachments.each do |media_attachment|
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texts[media_attachment] = html_escape(media_attachment.description)
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end
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texts
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end
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def build_status_translation(translations)
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status_translation = Translation.new(
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detected_source_language: translations.first&.detected_source_language,
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language: @target_language,
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provider: translations.first&.provider,
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content: '',
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spoiler_text: '',
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poll_options: [],
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media_attachments: []
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)
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@source_texts.keys.each_with_index do |source, index|
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translation = translations[index]
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case source
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when :content
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status_translation.content = unwrap_emoji_shortcodes(translation.text).to_html
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when :spoiler_text
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status_translation.spoiler_text = unwrap_emoji_shortcodes(translation.text).content
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when Poll::Option
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status_translation.poll_options << Translation::Option.new(
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title: unwrap_emoji_shortcodes(translation.text).content
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)
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when MediaAttachment
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status_translation.media_attachments << Translation::MediaAttachment.new(
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id: source.id,
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description: html_entities.decode(translation.text)
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)
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end
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end
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status_translation
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end
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def wrap_emoji_shortcodes(text)
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EmojiFormatter.new(text, @status.emojis, { raw_shortcode: true }).to_s
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end
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def unwrap_emoji_shortcodes(html)
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fragment = Nokogiri::HTML.fragment(html)
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fragment.css('span[translate="no"]').each do |element|
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element.remove_attribute('translate')
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element.replace(element.children) if element.attributes.empty?
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end
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fragment
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end
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def html_entities
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HTMLEntities.new
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end
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end
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