feat: rendering pipeline logic

server/modules/rendering/markdown-core/definition.yml

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+key: markdownCore
+title: Core
+description: Basic Markdown Parser
+author: requarks.io
+input: markdown
+output: html
+icon: crop_free
+props:
+  allowHTML:
+    type: Boolean
+    default: true
+    title: Allow HTML
+    hint: Enable HTML tags in content
+  linkify:
+    type: Boolean
+    default: true
+    title: Automatically convert links
+    hint: Links will automatically be converted to clickable links.
+  linebreaks:
+    type: Boolean
+    default: true
+    title: Automatically convert line breaks
+    hint: Add linebreaks within paragraphs.
+  typographer:
+    type: Boolean
+    default: false
+    title: Typographer
+    hint: Enable some language-neutral replacement + quotes beautification
+  quotes:
+    type: String
+    default: English
+    title: Quotes style
+    hint: When typographer is enabled. Double + single quotes replacement pairs. e.g. «»„“ for Russian, „“‚‘ for German, etc.
+    enum:
+      - Chinese
+      - English
+      - French
+      - German
+      - Greek
+      - Japanese
+      - Hungarian
+      - Polish
+      - Portuguese
+      - Russian
+      - Spanish
+      - Swedish
+  highlightCode:
+    type: Boolean
+    default: true
+    title: Highlight code blocks
+    hint: Add syntax coloring to code blocks.

server/modules/rendering/markdown-core/renderer.js

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+const md = require('markdown-it')
+// const hljs = require('highlight.js')
+const _ = require('lodash')
+
+const quoteStyles = {
+  Chinese: '””‘’',
+  English: '“”‘’',
+  French: ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'],
+  German: '„“‚‘',
+  Greek: '«»‘’',
+  Japanese: '「」「」',
+  Hungarian: '„”’’',
+  Polish: '„”‚‘',
+  Portuguese: '«»‘’',
+  Russian: '«»„“',
+  Spanish: '«»‘’',
+  Swedish: '””’’'
+}
+
+module.exports = {
+  async render() {
+    const mkdown = md({
+      html: this.config.allowHTML,
+      breaks: this.config.linebreaks,
+      linkify: this.config.linkify,
+      typographer: this.config.typographer,
+      quotes: _.get(quoteStyles, this.config.quotes, quoteStyles.English),
+      highlight(str, lang) {
+        // if (this.config.highlightCode && lang && hljs.getLanguage(lang)) {
+        //   try {
+        //     return '<pre class="hljs"><code>' + hljs.highlight(lang, str, true).value + '</code></pre>'
+        //   } catch (err) {
+        //     return '<pre><code>' + _.escape(str) + '</code></pre>'
+        //   }
+        // }
+        return '<pre><code>' + _.escape(str) + '</code></pre>'
+      }
+    })
+
+    return mkdown.render(this.input)
+  }
+}