AI SDKとGeminiで市場分析を自動化！最先端のAIエージェント開発最前線

mkdir market-trend-app
cd market-trend-app
npm init -y

npm install ai @ai-sdk/google zod puppeteer chart.js
npm install -D @types/node tsx typescript @types/chart.js
npx tsc --init

import { google } from "@ai-sdk/google";
import { generateText } from "ai";

async function main() {
  const { text } = await generateText({
    model: google("gemini-3.7-flash"),
    prompt: 'What is plant-based milk?',
  });
  console.log(text);
}
main().catch(console.error);

import { google } from "@ai-sdk/google";
import { generateText } from "ai";

async function main() {
  // Step 1: Search market trends
  const { text: marketTrends, sources } = await generateText({
    model: google("gemini-3.7-flash"),
    tools: {
      google_search: google.tools.googleSearch({}),
    },
    prompt: `Search the web for market trends for plant-based milk in North America for 2024-2025.
I need to know the market size, key players and their market share, and primary consumer drivers.
`,
  });
  console.log("Market trends found:\n", marketTrends);
  // 必要であれば、以下の行をアンコメントして情報源を確認できます。
  // console.log("Sources:\n", sources);
}
main().catch(console.error);

import { google } from "@ai-sdk/google";
import { generateText, generateObject } from "ai";
import { z } from "zod"; // zod/v4ではなく、zodを直接インポートします。
import { ChartConfiguration } from "chart.js";

// Chart.jsのコンフィグを作成するヘルパー関数
function createChartConfig({
  labels,
  data,
  label,
  type,
  colors,
}: {
  labels: string[];
  data: number[];
  label: string;
  type: "bar" | "line";
  colors: string[];
}): ChartConfiguration {
  return {
    type: type,
    data: {
      labels: labels,
      datasets: [
        {
          label: label,
          data: data,
          borderWidth: 1,
          ...(type === "bar" && { backgroundColor: colors }),
          ...(type === "line" && colors.length > 0 && { borderColor: colors[0] }),
        },
      ],
    },
    options: {
      animation: {
        duration: 0
      }, // 静的なPDFレンダリングのためにアニメーションを無効化
    },
  };
}

async function main() {
  // Step 1: Search market trends (省略 - 上記のコードを参照)
  const { text: marketTrends, sources } = await generateText({
    model: google("gemini-3.7-flash"),
    tools: {
      google_search: google.tools.googleSearch({}),
    },
    prompt: `Search the web for market trends for plant-based milk in North America for 2024-2025.
I need to know the market size, key players and their market share, and primary consumer drivers.
`,
  });
  console.log("Market trends found.");

  // Step 2: Extract chart data
  const { object: chartData } = await generateObject({
    model: google("gemini-3.7-flash"),
    schema: z.object({
      chartConfigurations: z
        .array(
          z.object({
            type: z.enum(["bar", "line"]).describe('The type of chart to generate. Either "bar" or "line"'),
            labels: z.array(z.string()).describe("A list of chart labels"),
            data: z.array(z.number()).describe("A list of the chart data"),
            label: z.string().describe("A label for the chart"),
            colors: z.array(z.string()).describe('A list of colors to use for the chart, e.g. "rgba(255, 99, 132, 0.8)"'),
          }),
        )
        .describe("A list of chart configurations"),
    }),
    prompt:
      `Given the following market trends text, come up with a list of 1-3 meaningful bar or line charts
and generate chart data.
Market Trends:
${marketTrends}
`,
  });

  const chartConfigs = chartData.chartConfigurations.map(createChartConfig);
  console.log("Chart configurations generated.");

  // Step 3: Generate the final report (このセクションの続きで実装します)
  // ここでは、これらのグラフ設定と市場トレンドのテキストを組み合わせて、
  // Puppeteerを使ってHTMLレポートを生成し、PDFとして保存する処理が続きます。
  // これにより、数分でプロフェッショナルな市場分析レポートが完成するわけです。
}
main().catch(console.error);