ドクセル埋め込み対応

packages/zenn-cli/articles/305-example-embed-others.md

@@ -56,6 +56,12 @@ published: true
 
 @[speakerdeck](4f926da9cb4cd0001f00a1ff)
 
+## docswell
+
+@[docswell](https://www.docswell.com/slide/LK7J5V/embed)
+
+@[docswell](https://www.docswell.com/s/ku-suke/LK7J5V-hello-docswell)
+
 ## jsfiddle
 
 @[jsfiddle](https://jsfiddle.net/9wkngdue/embedded)

packages/zenn-content-css/src/_embed.scss

@@ -8,6 +8,7 @@ span.embed-block {
 }
 .embed-slideshare,
 .embed-speakerdeck,
+.embed-docswell,
 .embed-codepen,
 .embed-jsfiddle,
 .embed-youtube,

packages/zenn-markdown-html/__tests__/custom-syntax/embed/docswell.test.ts

@@ -0,0 +1,35 @@
+import { describe, test, expect } from 'vitest';
+import markdownToHtml from '../../../src/index';
+
+describe('Docswell', () => {
+  describe('Docswellの埋め込み用URLの場合', () => {
+    test('Docswellのiframeを返すこと', () => {
+      const html = markdownToHtml(
+        '@[docswell](https://www.docswell.com/slide/LK7J5V/embed)'
+      );
+      expect(html).toContain(
+        '<span class="embed-block embed-docswell"><iframe src="https://www.docswell.com/slide/LK7J5V/embed" allowfullscreen="true" width="620" style="border:1px solid #ccc;display:block;margin:0px auto;padding:0px;aspect-ratio:620/349"></iframe></span>'
+      );
+    });
+  });
+
+  describe('DocswellのスライドURLの場合', () => {
+    test('Docswellのiframeを返すこと', () => {
+      const html = markdownToHtml(
+        '@[docswell](https://www.docswell.com/s/ku-suke/LK7J5V-hello-docswell)'
+      );
+      expect(html).toContain(
+        '<span class="embed-block embed-docswell"><iframe src="https://www.docswell.com/slide/LK7J5V/embed" allowfullscreen="true" width="620" style="border:1px solid #ccc;display:block;margin:0px auto;padding:0px;aspect-ratio:620/349"></iframe></span>'
+      );
+    });
+  });
+
+  describe('DocswellのURLが不正な場合', () => {
+    test('エラーメッセージを返すこと', () => {
+      const html = markdownToHtml(
+        '@[docswell](https://www.docswell.com/invalid)'
+      );
+      expect(html).toContain('DocswellのスライドURLが不正です');
+    });
+  });
+});

packages/zenn-markdown-html/__tests__/matchers/isDocswellUrl.test.ts

@@ -0,0 +1,39 @@
+import { isDocswellUrl } from '../../src/utils/url-matcher';
+import { describe, test, expect } from 'vitest';
+
+describe('isDocswellUrlのテスト', () => {
+  describe('Docswellの埋め込み用URLの場合', () => {
+    test('trueを返すこと', () => {
+      const docswellEmbedUrl = 'https://www.docswell.com/slide/LK7J5V/embed';
+      expect(isDocswellUrl(docswellEmbedUrl)).toBe(true);
+    });
+  });
+
+  describe('DocswellのスライドURLの場合', () => {
+    test('trueを返すこと', () => {
+      const docswellSlideUrl =
+        'https://www.docswell.com/s/ku-suke/LK7J5V-hello-docswell';
+      expect(isDocswellUrl(docswellSlideUrl)).toBe(true);
+    });
+  });
+
+  describe('Docswellの他の画面のURLの場合', () => {
+    test('falseを返すこと', () => {
+      const docswellUrls = ['https://www.docswell.com/'];
+
+      docswellUrls.forEach((url) => {
+        expect(isDocswellUrl(url)).toBe(false);
+      });
+    });
+  });
+
+  describe('他のサイトのURLの場合', () => {
+    test('falseを返すこと', () => {
+      const otherSiteUrls = ['https://zenn.dev/', 'https://github.com/'];
+
+      otherSiteUrls.forEach((url) => {
+        expect(isDocswellUrl(url)).toBe(false);
+      });
+    });
+  });
+});

packages/zenn-markdown-html/src/embed.ts

@@ -1,7 +1,6 @@
 import type { MarkdownOptions } from './types';
 
 import { escapeHtml } from 'markdown-it/lib/common/utils';
-import { extractYoutubeVideoParameters } from './utils/url-matcher';
 import {
   sanitizeEmbedToken,
   generateEmbedServerIframe,
@@ -17,6 +16,9 @@ import {
   isBlueprintUEUrl,
   isFigmaUrl,
   isValidHttpUrl,
+  isDocswellUrl,
+  extractYoutubeVideoParameters,
+  extractDocswellEmbedUrl,
 } from './utils/url-matcher';
 
 /* 埋め込み要素の種別 */
@@ -25,6 +27,7 @@ export type EmbedType =
   | 'slideshare'
   | 'speakerdeck'
   | 'jsfiddle'
+  | 'docswell'
   | 'codepen'
   | 'codesandbox'
   | 'stackblitz'
@@ -77,6 +80,17 @@ export const embedGenerators: Readonly<EmbedGeneratorList> = {
       key
     )}" scrolling="no" allowfullscreen allow="encrypted-media" loading="lazy"></iframe></span>`;
   },
+  docswell(str) {
+    const errorMessage = 'DocswellのスライドURLが不正です';
+    if (!isDocswellUrl(str)) {
+      return errorMessage;
+    }
+    const slideUrl = extractDocswellEmbedUrl(str);
+    if (!slideUrl) {
+      return errorMessage;
+    }
+    return `<span class="embed-block embed-docswell"><iframe src="${slideUrl}" allowfullscreen="true" class="docswell-iframe" width="620" height="349" style="border: 1px solid #ccc; display: block; margin: 0px auto; padding: 0px; aspect-ratio: 620/349;"></iframe></span>`;
+  },
   jsfiddle(str) {
     if (!isJsfiddleUrl(str)) {
       return 'jsfiddleのURLが不正です';

packages/zenn-markdown-html/src/utils/url-matcher.ts

@@ -47,6 +47,17 @@ export function isJsfiddleUrl(url: string): boolean {
   return /^(http|https):\/\/jsfiddle\.net\/[a-zA-Z0-9_,/-]+$/.test(url);
 }
 
+const docswellNormalUrlRegex =
+  /^https:\/\/www\.docswell\.com\/s\/[a-zA-Z0-9_-]+\/[a-zA-Z0-9_-]+$/;
+const docswellEmbedUrlRegex =
+  /^https:\/\/www\.docswell\.com\/slide\/[a-zA-Z0-9_-]+\/embed$/;
+
+export function isDocswellUrl(url: string): boolean {
+  return [docswellNormalUrlRegex, docswellEmbedUrlRegex].some((pattern) =>
+    pattern.test(url)
+  );
+}
+
 export function isYoutubeUrl(url: string): boolean {
   return [
     /^https?:\/\/youtu\.be\/[\w-]+(?:\?[\w=&-]+)?$/,
@@ -80,6 +91,22 @@ export function extractYoutubeVideoParameters(
   return { videoId, start };
 }
 
+export function extractDocswellEmbedUrl(url: string): string | null {
+  // Embed用URLの場合、そのまま返す
+  if (docswellEmbedUrlRegex.test(url)) {
+    return url;
+  }
+  // Embed用URLでない場合 https://www.docswell.com/s/:username/{slideId}-hello-docswell のslideIdを抽出する
+  const slideId = new URL(url).pathname.split('/').at(3)?.split('-').at(0);
+  if (!slideId) {
+    return null;
+  }
+  return new URL(
+    `/slide/${slideId}/embed`,
+    'https://www.docswell.com'
+  ).toString();
+}
+
 /**
  * 参考: https://blueprintue.com/
  * 生成されるURLをもとに正規表現を定義した