Reorganize repo.

packages/js/block-markdown/index.js

@@ -0,0 +1,34 @@
+import {unified} from 'unified'
+import remarkParse from 'remark-parse'
+import remarkRehype from 'remark-rehype'
+import rehypeStringify from 'rehype-stringify'
+
+export default function (config) {
+
+  return async function ({ lineData, ended, next }) {
+    if (ended) return ''
+    const blockLevel = lineData.level
+
+    let md = ''
+
+    function finalize() {
+      return unified()
+      .use(remarkParse)
+      .use(remarkRehype)
+      .use(rehypeStringify)
+      .process(md)
+    }
+
+    async function markdownContents({ line, lineData, ended }) {
+      if (ended || lineData.level <= blockLevel) {
+        const final = String(await finalize())
+        return final
+      }
+
+      md += line.slice(blockLevel + 1) + '\n'
+      return markdownContents(await next())
+    }
+
+    return markdownContents(await next())
+  }
+}