Adding markdown spoiler support.

- Fixes #350

package.json

@@ -46,7 +46,14 @@
     "inferno-i18next": "github:nimbusec-oss/inferno-i18next#semver:^7.4.2",
     "inferno-router": "^8.2.2",
     "inferno-server": "^8.2.2",
-    "markdown-it": "^14.0.0",
+    "markdown-it": "^14.1.0",
+    "markdown-it-bidi": "^0.1.0",
+    "markdown-it-container": "^4.0.0",
+    "markdown-it-emoji": "^3.0.0",
+    "markdown-it-footnote": "^4.0.0",
+    "markdown-it-ruby": "^0.1.1",
+    "markdown-it-sub": "^2.0.0",
+    "markdown-it-sup": "^2.0.0",
     "node-fetch": "^3.3.2",
     "qrcode": "^1.5.3",
     "run-node-webpack-plugin": "^1.3.0",

pnpm-lock.yaml

@@ -55,7 +55,7 @@ importers:
         version: 3.0.6
       daisyui:
         specifier: ^4.6.0
-        version: 4.6.0(postcss@8.4.38)
+        version: 4.6.0(postcss@8.4.40)
       express:
         specifier: ~4.18.2
         version: 4.18.2
@@ -87,8 +87,29 @@ importers:
         specifier: ^8.2.2
         version: 8.2.3
       markdown-it:
-        specifier: ^14.0.0
+        specifier: ^14.1.0
-        version: 14.0.0
+        version: 14.1.0
+      markdown-it-bidi:
+        specifier: ^0.1.0
+        version: 0.1.0
+      markdown-it-container:
+        specifier: ^4.0.0
+        version: 4.0.0
+      markdown-it-emoji:
+        specifier: ^3.0.0
+        version: 3.0.0
+      markdown-it-footnote:
+        specifier: ^4.0.0
+        version: 4.0.0
+      markdown-it-ruby:
+        specifier: ^0.1.1
+        version: 0.1.1
+      markdown-it-sub:
+        specifier: ^2.0.0
+        version: 2.0.0
+      markdown-it-sup:
+        specifier: ^2.0.0
+        version: 2.0.0
       node-fetch:
         specifier: ^3.3.2
         version: 3.3.2
@@ -2357,8 +2378,29 @@ packages:
     resolution: {integrity: sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==}
     engines: {node: '>=10'}
 
-  markdown-it@14.0.0:
+  markdown-it-bidi@0.1.0:
-    resolution: {integrity: sha512-seFjF0FIcPt4P9U39Bq1JYblX0KZCjDLFFQPHpL5AzHpqPEKtosxmdq/LTVZnjfH7tjt9BxStm+wXcDBNuYmzw==}
+    resolution: {integrity: sha512-4GloQnF+PiILh6wkLAIeSxCLo9qUW7LcKj/08GyCpvo0LLC6YEhrZBvM9RkMkieGG7i4uIRE/F5jmU14DgR8Wg==}
+
+  markdown-it-container@4.0.0:
+    resolution: {integrity: sha512-HaNccxUH0l7BNGYbFbjmGpf5aLHAMTinqRZQAEQbMr2cdD3z91Q6kIo1oUn1CQndkT03jat6ckrdRYuwwqLlQw==}
+
+  markdown-it-emoji@3.0.0:
+    resolution: {integrity: sha512-+rUD93bXHubA4arpEZO3q80so0qgoFJEKRkRbjKX8RTdca89v2kfyF+xR3i2sQTwql9tpPZPOQN5B+PunspXRg==}
+
+  markdown-it-footnote@4.0.0:
+    resolution: {integrity: sha512-WYJ7urf+khJYl3DqofQpYfEYkZKbmXmwxQV8c8mO/hGIhgZ1wOe7R4HLFNwqx7TjILbnC98fuyeSsin19JdFcQ==}
+
+  markdown-it-ruby@0.1.1:
+    resolution: {integrity: sha512-ct8t/Drt7scv20VdaQtOhpBOC2SDICaW8E/WQS8kY2eUdu0eoDwW8ugXcCy8Vku4Y5CuA5qrewlHpwaFsJxbpQ==}
+
+  markdown-it-sub@2.0.0:
+    resolution: {integrity: sha512-iCBKgwCkfQBRg2vApy9vx1C1Tu6D8XYo8NvevI3OlwzBRmiMtsJ2sXupBgEA7PPxiDwNni3qIUkhZ6j5wofDUA==}
+
+  markdown-it-sup@2.0.0:
+    resolution: {integrity: sha512-5VgmdKlkBd8sgXuoDoxMpiU+BiEt3I49GItBzzw7Mxq9CxvnhE/k09HFli09zgfFDRixDQDfDxi0mgBCXtaTvA==}
+
+  markdown-it@14.1.0:
+    resolution: {integrity: sha512-a54IwgWPaeBCAAsv13YgmALOF1elABB08FxO9i+r4VFk5Vl4pKokRPeX8u5TCgSsPi6ec1otfLjdOpVcgbpshg==}
     hasBin: true
 
   mdurl@2.0.0:
@@ -3369,8 +3411,8 @@ packages:
     engines: {node: '>=14.17'}
     hasBin: true
 
-  uc.micro@2.0.0:
+  uc.micro@2.1.0:
-    resolution: {integrity: sha512-DffL94LsNOccVn4hyfRe5rdKa273swqeA5DJpMOeFmEn1wCDc7nAbbB0gXlgBCL7TNzeTv6G7XVWzan7iJtfig==}
+    resolution: {integrity: sha512-ARDJmphmdvUk6Glw7y9DQ2bFkKBHwQHLi2lsaH6PPmz/Ka9sFOBsBluozhDltWmnv9u/cF6Rt87znRTPV+yp/A==}
 
   undici-types@5.26.5:
     resolution: {integrity: sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==}
@@ -5125,12 +5167,12 @@ snapshots:
 
   culori@3.3.0: {}
 
-  daisyui@4.6.0(postcss@8.4.38):
+  daisyui@4.6.0(postcss@8.4.40):
     dependencies:
       css-selector-tokenizer: 0.8.0
       culori: 3.3.0
       picocolors: 1.0.0
-      postcss-js: 4.0.1(postcss@8.4.38)
+      postcss-js: 4.0.1(postcss@8.4.40)
     transitivePeerDependencies:
       - postcss
 
@@ -5952,7 +5994,7 @@ snapshots:
 
   linkify-it@5.0.0:
     dependencies:
-      uc.micro: 2.0.0
+      uc.micro: 2.1.0
 
   lint-staged@15.2.7:
     dependencies:
@@ -6020,14 +6062,28 @@ snapshots:
     dependencies:
       yallist: 4.0.0
 
-  markdown-it@14.0.0:
+  markdown-it-bidi@0.1.0: {}
+
+  markdown-it-container@4.0.0: {}
+
+  markdown-it-emoji@3.0.0: {}
+
+  markdown-it-footnote@4.0.0: {}
+
+  markdown-it-ruby@0.1.1: {}
+
+  markdown-it-sub@2.0.0: {}
+
+  markdown-it-sup@2.0.0: {}
+
+  markdown-it@14.1.0:
     dependencies:
       argparse: 2.0.1
       entities: 4.5.0
       linkify-it: 5.0.0
       mdurl: 2.0.0
       punycode.js: 2.3.1
-      uc.micro: 2.0.0
+      uc.micro: 2.1.0
 
   mdurl@2.0.0: {}
 
@@ -6288,11 +6344,6 @@ snapshots:
       read-cache: 1.0.0
       resolve: 1.22.8
 
-  postcss-js@4.0.1(postcss@8.4.38):
-    dependencies:
-      camelcase-css: 2.0.1
-      postcss: 8.4.38
-
   postcss-js@4.0.1(postcss@8.4.40):
     dependencies:
       camelcase-css: 2.0.1
@@ -6868,7 +6919,7 @@ snapshots:
 
   typescript@5.4.5: {}
 
-  uc.micro@2.0.0: {}
+  uc.micro@2.1.0: {}
 
   undici-types@5.26.5: {}
 

src/shared/utils.ts

@@ -1,4 +1,10 @@
-import markdown_it from "markdown-it";
+import { default as MarkdownIt } from "markdown-it";
+import markdown_it_container from "markdown-it-container";
+import markdown_it_bidi from "markdown-it-bidi";
+import markdown_it_footnote from "markdown-it-footnote";
+import markdown_it_ruby from "markdown-it-ruby";
+import markdown_it_sub from "markdown-it-sub";
+import markdown_it_sup from "markdown-it-sup";
 
 let SHORTNUM_SI_FORMAT = new Intl.NumberFormat("en-US", {
   maximumFractionDigits: 1,
@@ -15,11 +21,47 @@ export function isBrowser() {
   return typeof window !== "undefined";
 }
 
-export const md = new markdown_it({
+const spoilerConfig = {
+  validate: (params: string) => {
+    return params.trim().match(/^spoiler\s+(.*)$/);
+  },
+
+  render: (tokens: any, idx: any) => {
+    const m = tokens[idx].info.trim().match(/^spoiler\s+(.*)$/);
+    if (tokens[idx].nesting === 1) {
+      // opening tag
+      const summary = mdToHtmlInline(md.utils.escapeHtml(m[1])).__html;
+      return `<details><summary> ${summary} </summary>\n`;
+    } else {
+      // closing tag
+      return "</details>\n";
+    }
+  },
+};
+
+// Zero disables all rules.
+// Only explicitly allow a limited set of rules safe for use in post titles.
+export const mdLimited: MarkdownIt = new MarkdownIt("zero").enable([
+  "emphasis",
+  "backticks",
+  "strikethrough",
+]);
+
+export function mdToHtmlInline(text: string) {
+  return { __html: mdLimited.renderInline(text) };
+}
+
+export const md = new MarkdownIt({
   html: true,
   linkify: true,
   typographer: true,
-});
+})
+  .use(markdown_it_sub)
+  .use(markdown_it_sup)
+  .use(markdown_it_footnote)
+  .use(markdown_it_container, "spoiler", spoilerConfig)
+  .use(markdown_it_ruby)
+  .use(markdown_it_bidi);
 
 export function mdToHtml(text: string) {
   return { __html: md.render(text) };