Summarizer API 可帮助 Bright Sites 和 Terra 创建引人入胜的文章摘要

// Check if the device supports built-in AI
// Trigger the model download if not yet available, on capable devices
export const deviceCheck = async () => {
  const availability = await Summarizer.availability();
  if (!availability || availability === 'unavailable') {
    return {
      summarizationAvailable: false,
      message:
        "AI summarization tools are not supported on this device" +
        "or the appropriate permissions are not set.",
    }
  }
  if (availability === 'downloadable') {
    const shouldDownload = window.confirm(
      "This page contains an AI summary. To view this summary, you must" +
      "download a language model, which is approximately 3GB in size." +
      "Would you like to download the model?",
    )

    if (!shouldDownload) {
      return {
        summarizationAvailable: false,
        message: "User declined installation.",
      }
    }

    // Trigger an installation
    Summarizer.create();
    return {
      summarizationAvailable: false,
      message: "Installing in the background. This may take a few minutes...",
    }
  }

  if (availability === 'available') {
    return {
      summarizationAvailable: true,
      message: "Ready for use.",
    }
  }
}

/**
* Define the summarizer.
**/
export const aiSummarize = async (textToSummarize, options) => {
 const availableSummarizationTools = getAvailableAiSummarizationTools()

 if (availableSummarizationTools.has('clientSideAI') && options?.clientSideAI) {
   // Generate the summarizer and abort signal
   const summarizer = await createclientSideAISummarizer(options.clientSideAI.options)
   return await summarizer.summarize(textToSummarize, {
     signal: options.clientSideAI.signal,
   })
 }
 throw new Error(
   'AI summarization tools are not supported on this device or browser.',
 )
}

/**
* Log preferences in IndexDB for personalization
**/
abortController.current = new AbortController()
const preferencesDB = new PreferencesDB()
const summarization = await aiSummarize(articleContent, {
 clientSideAI: {
   options: await preferencesDB.getCreatesummarizerPreferences(),
   signal: abortController.current.signal,
 },
})

async function summarizerByBuiltInAI(text) {
  if (!(Summarizer)) {
    //Alert users in Portuguese that "Summarizer API is not available"
    cms_alert(ALERT_TYPE_ERROR, "Summarizer API não está disponível.")
    return null
  }

  try {
    const availability = await Summarizer.availability();
    if (availability !== 'available') {
      cms_alert(ALERT_TYPE_ERROR, "Summarizer API não está disponível.")
      return null 
    }

    const summaryContext = "Avoid jargon, use correct grammar, focus on clarity," +
    "and ensure the user can grasp the articles purpose," +
    "without needing to open the original content.";

    const options = {
      sharedContext: summaryContext,
      type: 'teaser',
      format: 'plain-text',
      length: 'long',
    }

    if (availability === 'available') {
      const summarizer = await Summarizer.create(options);
      return await summarizer.summarize(text, {
        context: summaryContext
      })
    }
    // return the download of the Summarizer Model
    if(availability === 'downloadable'){
      return await Summarizer.create();
    }
  } catch (error) {
    //EN: "Error using the Summarizer API"
    cms_alert(ALERT_TYPE_ERROR, "Erro ao usar o Summarizer API.");
    console.error("Erro ao usar o Summarizer API:", error);
    return null
  }
}

async function translateTextByBuiltInAI(text, sourceLanguage, targetLanguage) {
  if (!('translation' in self && 'createTranslator' in self.translation)) {
    return null
  }

  try {
    const translator = await Translator.create({
      sourceLanguage,
      targetLanguage,
    })
    return await translator.translate(text)
  } catch (error) {
    throw error
  }
}
const text = `Title: ${contentTitle};\n\n Sub-title: ${contentSubtitle};\n\n Article content: ${plainText}.`;

const canTranslate = await Translator.availability({
  sourceLanguage: 'pt',
  targetLanguage: 'en',
})

if (canTranslate !== 'available') {
  if (canTranslate === 'downloadable') {
    try {
      await Translator.create({
        sourceLanguage: 'pt',
        targetLanguage: 'en',
      })
      //EN: "Language download completed successfully."
      cms_alert(ALERT_TYPE_OK, "Download do idioma concluído com sucesso.");
    } catch (downloadError) {
      //EN: "Error downloading the language required for translation."
      cms_alert(ALERT_TYPE_ERROR, "Erro ao realizar download do idioma necessário para tradução.");
      return
    }
  } else {
    //EN: "Translation is not available or not ready."
    cms_alert(ALERT_TYPE_ERROR, "A tradução não está disponível ou não está pronta.");
    return
  }
}

const translatedText = await translateTextByBuiltInAI(text, 'pt', 'en') 
const summarizedText = await summarizerByBuiltInAI(translatedText) 
const translatedBackText = await translateTextByBuiltInAI(summarizedText, 'en', 'pt')