fix: Token type hr not supported by Markdown parser (#8003)

app/javascript/dashboard/helper/editorHelper.js

@@ -3,6 +3,7 @@ import {
   MessageMarkdownTransformer,
   MessageMarkdownSerializer,
 } from '@chatwoot/prosemirror-schema';
+import * as Sentry from '@sentry/browser';
 
 /**
  * The delimiter used to separate the signature from the rest of the body.
@@ -14,9 +15,25 @@ export const SIGNATURE_DELIMITER = '--';
  * Parse and Serialize the markdown text to remove any extra spaces or new lines
  */
 export function cleanSignature(signature) {
-  // convert from markdown to common mark format
-  const nodes = new MessageMarkdownTransformer(messageSchema).parse(signature);
-  return MessageMarkdownSerializer.serialize(nodes);
+  try {
+    // remove any horizontal rule tokens
+    signature = signature
+      .replace(/^( *\* *){3,} *$/gm, '')
+      .replace(/^( *- *){3,} *$/gm, '')
+      .replace(/^( *_ *){3,} *$/gm, '');
+
+    const nodes = new MessageMarkdownTransformer(messageSchema).parse(
+      signature
+    );
+    return MessageMarkdownSerializer.serialize(nodes);
+  } catch (e) {
+    // eslint-disable-next-line no-console
+    console.warn(e);
+    Sentry.captureException(e);
+    // The parser can break on some cases
+    // for example, Token type `hr` not supported by Markdown parser
+    return signature;
+  }
 }
 
 /**

app/javascript/dashboard/helper/specs/editorHelper.spec.js

@@ -85,6 +85,37 @@ describe('appendSignature', () => {
   });
 });
 
+describe('cleanSignature', () => {
+  it('removes any instance of horizontal rule', () => {
+    const options = [
+      '---',
+      '***',
+      '___',
+      '- - -',
+      '* * *',
+      '_ _ _',
+      ' ---',
+      '--- ',
+      ' --- ',
+      '-----',
+      '*****',
+      '_____',
+      '- - - -',
+      '* * * * *',
+      '_ _ _ _ _ _',
+      ' - - - - ',
+      ' * * * * * ',
+      ' _ _ _ _ _ _',
+      '- - - - -',
+      '* * * * * *',
+      '_ _ _ _ _ _ _',
+    ];
+    options.forEach(option => {
+      expect(cleanSignature(option)).toBe('');
+    });
+  });
+});
+
 describe('removeSignature', () => {
   it('does not remove signature if not present', () => {
     Object.keys(DOES_NOT_HAVE_SIGNATURE).forEach(key => {