handle escaped characters in markdown mentions

federation/entities/mixins.py

@@ -6,6 +6,7 @@ from typing import List, Set, Union, Dict, Tuple
 
 from bs4 import BeautifulSoup
 from commonmark import commonmark
+from markdownify import markdownify as md
 from marshmallow import missing
 
 from federation.entities.activitypub.enums import ActivityType
@@ -262,6 +263,9 @@ class RawContentMixin(BaseEntity):
             if handle:
                 self._mentions.add(handle)
                 self.raw_content = self.raw_content.replace(mention, '@' + handle)
+                # mardownify the extracted mention in case some characters are escaped in
+                # raw_content
+                self.raw_content = self.raw_content.replace(md(mention), '@' + handle)
 
 
 class OptionalRawContentMixin(RawContentMixin):

setup.py

@@ -37,6 +37,7 @@ setup(
         "lxml>=3.4.0",
         "iteration_utilities",
         "jsonschema>=2.0.0",
+        "markdownify",
         "pycryptodome>=3.4.10",
         "python-dateutil>=2.4.0",
         "python-httpsig-socialhome",