Revert "removed markdown"

This reverts commit 33836c2e7b.

src/components/Post.jsx

@@ -1,20 +1,73 @@
 import React from 'react';
+import ReactMarkdown from 'react-markdown';
+import { Link } from 'react-router-dom';
 import DOMPurify from 'dompurify';
 
-const Post = ({ content }) => {
+const blockquoteToGreentext = () => (tree) => {
+  tree.children.forEach((node) => {
+    if (node.type === 'blockquote') {
+      node.children.forEach((child) => {
+        if (child.type === 'paragraph' && child.children.length > 0) {
+          const prefix = {
+            type: 'text',
+            value: '>',
+          };
+          child.children.unshift(prefix);
+        }
+      });
+      node.type = 'div';
+      node.data = {
+        hName: 'div',
+        hProperties: {
+          className: 'greentext',
+        },
+      };
+    }
+  });
+};
+
+const createQuotelink = (handlequoteclick, comment, children) => {
+  const text = children.map((child) => (typeof child === 'string' ? child : child.props.children)).join('');
+  const regex = /(\s|^)(c\/[A-Za-z0-9]{12}|c\/[A-Za-z0-9]{45})(?=\s|$)/g;
+  const parts = text.split(regex);
+
+  return parts.flatMap((part, i) => {
+    if (regex.test(part)) {
+      return [
+        <Link
+          key={`link-${i}`}
+          className="quotelink"
+          to=""
+          onClick={handlequoteclick}
+        >
+          {part.trim()}
+        </Link>,
+      ];
+    } else {
+      return [part];
+    }
+  });
+};
+
+
+const Post = ({ content, handlequoteclick, comment }) => {
   const sanitizedContent = DOMPurify.sanitize(content);
 
-  const lines = sanitizedContent.split(/(?:\r\n|\r|\n)/);
-  const greentextLines = lines.map((line, index) => {
-    if (line.startsWith('>')) {
-      return <div className="greentext" key={`gt-${index}`}>{line}</div>;
-    } else if (line === '') {
-      return <div key={`empty-${index}`}>&nbsp;</div>;
-    }
-    return <div key={`line-${index}`}>{line}</div>;
-  });
-
-  return <>{greentextLines}</>;
+  return (
+    <ReactMarkdown
+      children={sanitizedContent}
+      remarkPlugins={[blockquoteToGreentext]}
+      components={{
+        img: () => null,
+        video: () => null,
+        source: () => null,
+        gif: () => null,
+        p: ({ children }) => (
+          <p>{createQuotelink(handlequoteclick, comment, children)}</p>
+        ),
+      }}
+    />
+  );
 };
 
 export default Post;