Next.jsでブログをつくった

---
slug: "blog-renewal"
title: "Next.jsでブログをつくった"
date: "20220326"
tags: ["tech", "web", "nextjs"]
---

| 普通に | 表  |
| ------ | --- |
| 1      | 2   |
| 3      | 4   |
 
<https://www.haxibami.net>
 
裸のリンクって ↑ こう書くのが Markdown のスタンダードらしい
 
その他、
 
- [x] TODO
- [ ] リストや、脚注 [^1]
 
[^1]: 脚注など

$$
( \sum_{k=1}^{n} a_k b_k )^2 \leq ( \sum_{k=1}^{n} {a_k}^2 ) ( \sum_{k=1}^{n} {b_k}^2 )
$$

$e^{i\pi} + 1 = 0$ :arrow_left: インライン数式

> 昨日午後、{†聖剣†}^(エクスカリバー)を振り回す{全裸中年男性}^(無敵の人)が出現し……

:arrow_right: [はじめに](#はじめに) に飛べるよ

```mermaid
sequenceDiagram
Alice->>John: Hello John, how are you?
loop Healthcheck
    John->>John: Fight against hypochondria
end
Note right of John: Rational thoughts!
John-->>Alice: Great!
John->>Bob: How about you?
Bob-->>John: Jolly good!
```
 
```mermaid
pie
"Dogs" : 386
"Cats" : 85
"Rats" : 15
```

import LinkCard from "components/LinkCard";
import NextImage from "components/NextImage";
import NextLink from "components/NextLink";
 
import type { LinkCardProps } from "components/LinkCard";
import type { NextImageProps } from "components/NextImage";
import type { NextLinkProps } from "components/NextLink";
import type { MDXComponents } from "mdx/types";
 
type ProvidedComponents = MDXComponents & {
  a?: typeof NextLink;
  img?: typeof NextImage;
  extlink?: typeof LinkCard;
};
 
const replaceComponents = {
  a: (props: NextLinkProps) => <NextLink {...props} />,
  img: (props: NextImageProps) => <NextImage {...props} />,
  extlink: (props: LinkCardProps) => <LinkCard {...props} />,
} as ProvidedComponents;
 
export default replaceComponents;

const result = compileMDX({
  source,
  components: MDXComponent,
});

import type { NextRequest } from "next/server";
 
import { ImageResponse } from "@vercel/og";
 
export const config = {
  runtime: "edge",
};
 
const handler = async (req: NextRequest) => {
  try {
    const { searchParams } = new URL(req.url);
    const title = searchParams.has("title")
      ? searchParams.get("title")?.slice(0, 80)
      : "";
    const date = searchParams.has("date")
      ? `📅 ― ${searchParams.get("date")?.slice(0, 8)}`
      : "";
 
    // CJK font is so large that if placed locally it easily exceeds the 1MB Edge Function limit >_<
    const notoFontData = await fetch(
      "https://rawcdn.githack.com/haxibami/Noto-Sans-CJK-JP/master/fonts/NotoSansCJKjp-Bold.woff"
    ).then((res) => res.arrayBuffer());
 
    const robotoFontData = await fetch(
      new URL("../../assets/RobotoMono-Medium.woff", import.meta.url)
    ).then((res) => res.arrayBuffer());
 
    const pngIcon = new URL(
      "../../assets/icon_ange_glasses_192.png",
      import.meta.url
    ).toString();
 
    return new ImageResponse(
      (
        <div
          style={{
            height: "100%",
            width: "100%",
            display: "flex",
            flexDirection: "column",
            alignItems: "center",
            justifyContent: "center",
            padding: "30px",
            fontFamily: "Noto Sans CJK JP",
            backgroundColor: "#171726",
            color: "#f2f0e6",
          }}
        >
          <div tw="flex flex-col p-12 w-full h-full border-solid border-4 border-white rounded-xl">
            <div tw="flex flex-1 max-w-full items-center max-h-full">
              <h1 tw="text-6xl leading-tight max-w-full">
                <p tw="w-full justify-center">{title}</p>
              </h1>
            </div>
            <div tw="flex flex-row justify-between items-center w-full">
              <div tw="flex items-center">
                {/* eslint-disable-next-line @next/next/no-img-element */}
                <img
                  src={pngIcon}
                  alt="haxicon"
                  width={100}
                  height={100}
                  tw="rounded-full mr-5"
                />
                <h2 tw="text-4xl mr-5">
                  <p
                    style={{
                      fontFamily: "Roboto Mono",
                    }}
                  >
                    haxibami.net
                  </p>
                </h2>
              </div>
              <div tw="flex">
                <h2 tw="text-4xl">
                  <p>{date}</p>
                </h2>
              </div>
            </div>
          </div>
        </div>
      ),
      {
        fonts: [
          {
            name: "Noto Sans CJK JP",
            data: notoFontData,
            weight: 700,
            style: "normal",
          },
          {
            name: "Roboto Mono",
            data: robotoFontData,
            weight: 500,
            style: "normal",
          },
        ],
      }
    );
  } catch (e) {
    console.log(`${e}`);
    return new Response(`Failed to generate the image`, {
      status: 500,
    });
  }
};
 
export default handler;

import fs from "fs";
 
import { globby } from "globby";
import prettier from "prettier";
 
import { dateConverter } from "./lib/build.js";
import { HOST } from "./lib/constant.js";
 
import type { PostData } from "./lib/interface.js";
 
// variables
const XMLFILE = "sitemap.xml";
 
// Article index file
const postIndexFile = fs.readFileSync("src/share/index.json", "utf-8");
const postIndex = JSON.parse(postIndexFile);
 
// format xml
const formatXml = (sitemap: string) =>
  prettier.format(sitemap, { parser: "html" });
 
// generate sitemap & robots.txt
const sitemapGenerator = async () => {
  const solidPaths = await globby(["src/pages/*.tsx", "src/pages/blog/*.tsx"], {
    ignore: [
      "src/pages/_*.tsx",
      "src/pages/404.tsx",
      "src/pages/grad_essay.tsx",
    ],
  });
 
  const solidPageInfos = solidPaths.map((filePath) => {
    const solidPageInfo = {
      relpath: filePath
        .replace("src/pages/", "")
        .replace(".tsx", "")
        .replace("index", ""),
      lastmod: new Date().toISOString(),
    };
    return solidPageInfo;
  });
 
  const blogposts = postIndex.articles.blog;
 
  const blogInfos = blogposts.map((post: PostData) => {
    const blogInfo = {
      relpath: `blog/posts/${post.data?.slug}`,
      lastmod: dateConverter(post.data?.date),
    };
    return blogInfo;
  });
 
  const sitemapInfos = solidPageInfos.concat(blogInfos);
 
  const pagesSitemap = `
 
  ${sitemapInfos
    .map((info) => {
      return `
        <url>
          <loc>https://${HOST}/${info.relpath}</loc>
          <lastmod>${info.lastmod}</lastmod>
        </url>
      `;
    })
    .join("")}
  `;
 
  const generatedSitemap = `
<?xml version="1.0" encoding="UTF-8"?>
<urlset
  xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd"
>
  ${pagesSitemap}
</urlset>
  `;
 
  const robots = `# *
User-agent: *
Allow: /
 
# Host
Host: https://www.haxibami.net
 
# Sitemaps
Sitemap: https://www.haxibami.net/sitemap.xml
`;
 
  fs.writeFileSync(`public/${XMLFILE}`, formatXml(generatedSitemap));
  fs.writeFileSync("public/robots.txt", robots);
};
 
const genSitemap = () => {
  return new Promise<void>((resolve) => {
    sitemapGenerator();
    resolve();
  });
};
 
export default genSitemap;

import fs from "fs";
 
import { Feed } from "feed";
 
import { dateConverter } from "./lib/build.js";
import { SITEDATA } from "./lib/constant.js";
import { getPostsData } from "./lib/fs.js";
 
// variables
const HOST = "https://www.haxibami.net";
 
// generate feed
const feedGenerator = async () => {
  const author = {
    name: "haxibami",
    email: "contact@haxibami.net",
    link: HOST,
  };
 
  const date = new Date();
  const feed = new Feed({
    title: SITEDATA.blog.title,
    description: SITEDATA.blog.description,
    id: HOST,
    link: HOST,
    language: "ja",
    image: `${HOST}/icon_ange_glasses_192.png`,
    favicon: `${HOST}/favicon.ico`,
    copyright: `All rights reserved ${date.getFullYear()}, ${author.name}`,
    updated: date,
    feedLinks: {
      rss2: `${HOST}/rss/feed.xml`,
      json: `${HOST}/rss/feed.json`,
      atom: `${HOST}/rss/atom.xml`,
    },
    author: author,
  });
 
  const blogs = await getPostsData("articles/blog");
 
  blogs.forEach((post) => {
    const url = `${HOST}/blog/posts/${post.data?.slug}`;
    feed.addItem({
      title: `${post.data?.title}`,
      description: `${post.preview}`,
      id: url,
      link: url,
      date: new Date(dateConverter(post.data?.date)),
    });
  });
 
  fs.mkdirSync("public/rss", { recursive: true });
  await Promise.all([
    fs.promises.writeFile("public/rss/feed.xml", feed.rss2()),
    fs.promises.writeFile("public/rss/atom.xml", feed.atom1()),
    fs.promises.writeFile("public/rss/feed.json", feed.json1()),
  ]);
};
 
const GenFeed = () => {
  return new Promise<void>((resolve) => {
    feedGenerator();
    resolve();
  });
};
 
export default GenFeed;