Check for existence of domain (refs #38)

Author: dcwatson

core/html.py

@@ -340,7 +340,11 @@ def render_post(self, html: str, post) -> str:
         parser = FediverseHtmlParser(
             html,
             mentions=post.mentions.all(),
-            uri_domain=(None if self.local else post.author.domain.uri_domain),
+            uri_domain=(
+                None
+                if self.local or not post.author.domain
+                else post.author.domain.uri_domain
+            ),
             find_hashtags=True,
             find_emojis=self.local,
             emoji_domain=post.author.domain,
@@ -355,7 +359,11 @@ def render_identity_summary(self, html: str, identity) -> str:
             return ""
         parser = FediverseHtmlParser(
             html,
-            uri_domain=(None if self.local else identity.domain.uri_domain),
+            uri_domain=(
+                None
+                if self.local or not identity.domain
+                else identity.domain.uri_domain
+            ),
             find_hashtags=True,
             find_emojis=self.local,
             emoji_domain=identity.domain,