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path: root/src/pages/og/[slug].png.ts
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import satori from "satori";
import { Resvg } from "@resvg/resvg-js";
import { readFileSync } from "node:fs";

const pages: Record<string, string> = {
  index: "だれもがしあわせに暮らせるまちへ",
  jisseki: "実績",
  policy: "私の方針",
  support: "ご支援",
  contact: "コンタクト",
  "whisper-to-ai-moji-okoshi":
    "無料・超高精度のWhisper + 生成AIで文字起こしする方法",
  "koubunsyo-kanri": "公文書管理の不正追及の軌跡",
  "ijime-judai-jitai": "いじめ重大事態への対応の軌跡",
  "fukushi-shisetsu-gyakutai": "障害者福祉施設における虐待通報対応の軌跡",
  "aiki-kouen": "合気公園の軌跡",
  "joutyo-koteikyu": "情緒固定級の軌跡",
  "kajo-seigen-kanwa": "過剰な制限緩和の軌跡",
  "saresio-kaihatu": "東京サレジオ学園北側開発問題の軌跡",
  "vaccine-kyuusai-tekiseika": "ワクチン副反応救済制度の適正化の軌跡",
  "dislexia-taiou": "ディスレクシア(読み書き障害)対応の軌跡",
  "ippan-situmon": "一般質問",
};

export async function getStaticPaths() {
  return Object.keys(pages).map((slug) => ({ params: { slug } }));
}

const fontBuffer = readFileSync("node_modules/.noto-sans-jp.otf");
const faceiconBuffer = readFileSync("public/img/faceicon.jpg");
const faceiconBase64 = `data:image/jpeg;base64,${faceiconBuffer.toString("base64")}`;

// Generate star elements for space-like background
const stars = [
  { x: 80, y: 40, r: 2, o: 0.8 },
  { x: 200, y: 90, r: 1.5, o: 0.6 },
  { x: 350, y: 30, r: 2.5, o: 0.9 },
  { x: 500, y: 80, r: 1, o: 0.5 },
  { x: 650, y: 50, r: 2, o: 0.7 },
  { x: 800, y: 100, r: 1.5, o: 0.6 },
  { x: 950, y: 40, r: 3, o: 0.85 },
  { x: 1100, y: 70, r: 1, o: 0.5 },
  { x: 1150, y: 120, r: 2, o: 0.7 },
  { x: 150, y: 160, r: 1, o: 0.4 },
  { x: 450, y: 140, r: 2, o: 0.5 },
  { x: 700, y: 160, r: 1.5, o: 0.45 },
  { x: 1000, y: 150, r: 2.5, o: 0.55 },
  { x: 50, y: 500, r: 1.5, o: 0.4 },
  { x: 300, y: 550, r: 2, o: 0.5 },
  { x: 600, y: 520, r: 1, o: 0.35 },
  { x: 850, y: 570, r: 2.5, o: 0.5 },
  { x: 1050, y: 540, r: 1, o: 0.4 },
  { x: 1150, y: 580, r: 1.5, o: 0.45 },
  { x: 120, y: 300, r: 1, o: 0.3 },
  { x: 1080, y: 280, r: 1.5, o: 0.35 },
].map((s, i) => ({
  type: "div" as const,
  props: {
    key: `star-${i}`,
    style: {
      position: "absolute" as const,
      left: `${s.x}px`,
      top: `${s.y}px`,
      width: `${s.r * 2}px`,
      height: `${s.r * 2}px`,
      borderRadius: "50%",
      background: `rgba(255,255,255,${s.o})`,
      boxShadow: `0 0 ${s.r * 3}px rgba(255,255,255,${s.o * 0.4})`,
    },
  },
}));

export async function GET({ params }: { params: { slug: string } }) {
  const slug = params.slug;
  const title = pages[slug] ?? "小平市議 安竹洋平 公式サイト";

  const svg = await satori(
    {
      type: "div",
      props: {
        style: {
          display: "flex",
          width: "1200px",
          height: "630px",
          background:
            "linear-gradient(135deg, #0f0d2e 0%, #1e1b4b 30%, #3730a3 60%, #4f46e5 100%)",
          color: "#ffffff",
          fontFamily: "sans-serif",
          padding: "64px 80px",
          alignItems: "center",
          gap: "56px",
          position: "relative",
          overflow: "hidden",
        },
        children: [
          ...stars,
          {
            type: "img",
            props: {
              src: faceiconBase64,
              width: 180,
              height: 180,
              style: {
                borderRadius: "50%",
                border: "3px solid rgba(255,255,255,0.25)",
                flexShrink: "0",
                position: "relative",
              },
            },
          },
          {
            type: "div",
            props: {
              style: {
                display: "flex",
                flexDirection: "column",
                gap: "20px",
                flex: "1",
                position: "relative",
              },
              children: [
                {
                  type: "div",
                  props: {
                    style: {
                      fontSize: "48px",
                      fontWeight: "700",
                      lineHeight: "1.2",
                      letterSpacing: "-0.02em",
                    },
                    children: title,
                  },
                },
                {
                  type: "div",
                  props: {
                    style: {
                      display: "flex",
                      gap: "14px",
                      fontSize: "24px",
                      fontWeight: "500",
                      color: "#a5b4fc",
                    },
                    children: [
                      { type: "div", props: { children: "だれもが" } },
                      {
                        type: "div",
                        props: {
                          style: { color: "#c7d2fe" },
                          children: "しあわせに",
                        },
                      },
                      {
                        type: "div",
                        props: {
                          style: { color: "#e0e7ff" },
                          children: "暮らせるまちへ",
                        },
                      },
                    ],
                  },
                },
                {
                  type: "div",
                  props: {
                    style: {
                      display: "flex",
                      gap: "16px",
                      fontSize: "20px",
                      fontWeight: "400",
                      color: "rgba(255,255,255,0.45)",
                      paddingTop: "12px",
                      borderTop: "1px solid rgba(255,255,255,0.1)",
                    },
                    children: [
                      { type: "div", props: { children: "小平市議 安竹洋平" } },
                      {
                        type: "div",
                        props: {
                          style: { opacity: "0.6" },
                          children: "yasutakeyohei.com",
                        },
                      },
                    ],
                  },
                },
              ],
            },
          },
        ],
      },
    } as any,
    {
      width: 1200,
      height: 630,
      fonts: [
        { name: "sans-serif", data: fontBuffer, weight: 400, style: "normal" },
      ],
    },
  );

  const resvg = new Resvg(svg, { fitTo: { mode: "width", value: 1200 } });
  const pngBuffer = resvg.render().asPng();

  return new Response(pngBuffer, {
    headers: {
      "Content-Type": "image/png",
      "Cache-Control": "public, max-age=31536000, immutable",
    },
  });
}