Migrate to djot

posthtml-djot/lib/index.js

@@ -0,0 +1,108 @@
+import {render} from 'posthtml-render'
+import {parser} from 'posthtml-parser'
+import * as djot from '@djot/djot'
+import minIndent from 'min-indent'
+import {resolve} from 'node:path'
+import {readFileSync} from 'node:fs'
+import {match} from 'posthtml/lib/api.js'
+
+const normalize = data => {
+  const indents = minIndent(data)
+
+  // Removing indents
+  if (indents !== 0) {
+    const replaceRegex = new RegExp(`^[ \\t]{${indents}}`, 'gm')
+
+    return data.replace(replaceRegex, '')
+  }
+
+  return data
+}
+
+const parse = (data, settings, html_settings, hasTag) => {
+  // Parsing content
+  const parsed = djot.renderHTML(djot.parse(data, settings), html_settings)
+
+  return hasTag ? `\n${parsed}` : parsed
+}
+
+const importDjot = (src, settings) => {
+  const from = resolve(settings.root, src)
+  const content = readFileSync(from, settings.encoding)
+
+  return normalize(content)
+}
+
+const plugin = options => {
+  const settings = {
+    root: './',
+    encoding: 'utf8',
+    djot: {},
+    djot_html: {},
+    ...options
+  }
+
+  return tree => {
+    tree.match = tree.match || match
+    tree.match([
+      {tag: 'dj'},
+      {tag: 'djot'},
+      {attrs: {dj: ''}},
+      {attrs: {djot: ''}}
+    ], node => {
+      let content = ''
+
+      if (['dj', 'djot'].includes(node.tag)) {
+        node.tag = false
+      }
+
+      if (node.attrs) {
+        // Change tag
+        if (node.attrs.tag) {
+          node.tag = node.attrs.tag
+
+          delete node.attrs.tag
+        }
+
+        for (const attribute of ['dj', 'djot']) {
+          if (attribute in node.attrs) {
+            delete node.attrs[attribute]
+          }
+        }
+
+        // Import djot file if specified
+        const src = node.attrs.src || false
+
+        if (src) {
+          content += importDjot(src, settings)
+
+          if (tree.messages) {
+            const from = resolve(settings.root, src)
+
+            tree.messages.push({
+              type: 'dependency',
+              file: from
+            })
+          }
+
+          delete node.attrs.src
+        }
+      }
+
+      // Converting content to html tree
+      content += normalize(render(node.content))
+
+      // Parsing content
+      const parsed = parse(content, settings.djot, settings.djot_html, node.tag)
+
+      // Converting tree to html content
+      node.content = parser(parsed)
+
+      return node
+    })
+
+    return tree
+  }
+}
+
+export default plugin