Link to images in RSS output

src/rss.py

@@ -42,12 +42,24 @@ def enrich_msg(
     lines,
     is_atom=True,
     accepted_images=[],
-    base_url=None,
-    trailing_punctuation=None,
+    base_url="",
+    trailing_punctuation="",
     desc_len_limit=-1,
 ):
     if not is_atom:
-        return line2words(lines, desc_len_limit, trailing_punctuation)
+        from urllib.parse import urljoin
+        words = line2words(lines, desc_len_limit, trailing_punctuation)
+        for i in range(len(words)):
+            token = words[i]
+            core = token.rstrip(trailing_punctuation)
+            suffix = token[len(core):]
+            if len(core) == 0 or "<" in core or ">" in core:
+                continue
+            if _is_image_token(core, accepted_images):
+                abs_url = urljoin(base_url, core)
+                anchor = f"<a href=\"{escape(abs_url)}\">{escape(abs_url)}</a>"
+                words[i] = anchor + suffix
+        return words
     content = []
     parser = My_Html_Parser([])
     for line in lines: