AI で商品レビューを評価する

const { GoogleGenerativeAI } = require("@google/generative-ai");

// Access the API key env
const genAI = new GoogleGenerativeAI(process.env.API_KEY_GEMINI);

async function generateReviewSummary(reviews) {
  // Use gemini-pro model for text-only input
  const model = genAI.getGenerativeModel({ model: "gemini-pro" });
  // Shortened for legibility. See "Write an effective prompt" for
  // writing an actual production-ready prompt.
  const prompt = `Summarize the following product reviews:\n\n${reviews}`;
  const result = await model.generateContent(prompt);
  const response = await result.response;
  const summary = response.text();
  return summary;
}

const prompt =
`I will give you user reviews for a product. Generate a short summary of the
reviews, with focus on the common positive and negative aspects across all of
the reviews. Use the exact same output format as in the example (list of
positive highlights, list of negative aspects, summary). In the summary,
address the potential buyer with second person ("you", "be aware").

Input (list of reviews):
// ... example

Output (summary of reviews):
// ... example

**Positive highlights**
// ... example
**Negative aspects**
// ... example
**Summary**
// ... example

Input (list of reviews):
${reviews}

Output (summary of all input reviews):`;

## Summary of Reviews:

**Positive highlights:**

* **Style:** Several reviewers appreciate the backpack's color and design.
* **Organization:** Some users love the compartments and find them useful for
  organization.
* **Travel & School:** The backpack seems suitable for both travel and school
  use, being lightweight and able to hold necessary items.

**Negative aspects:**

* **Durability:** Concerns regarding the zipper breaking and water bottle holder
  ripping raise questions about the backpack's overall durability.
* **Size:** A few reviewers found the backpack smaller than expected.
* **Material:** One user felt the material was cheap and expressed concern about
  its longevity.

**Summary:**

This backpack seems to be stylish and appreciated for its organization and
suitability for travel and school. However, you should be aware of potential
durability issues with the zippers and water bottle holder. Some users also
found the backpack smaller than anticipated and expressed concerns about the
material's quality.

const MAX_INPUT_TOKENS = 30720
const { totalTokens } = await model.countTokens(prompt);
if (totalTokens > MAX_INPUT_TOKENS) {
    // Shorten the prompt.
}