nanobot/channels/telegram.py

@@ -246,7 +246,7 @@ class TelegramChannel(BaseChannel):
         )
 
         # Process each media item
-        processed_media: list[tuple[str, MediaKind, bytes]] = []
+        processed_media: list[tuple[str, MediaKind, bytes, str]] = []
 
         for path in media_paths:
             try:
@@ -254,6 +254,8 @@ class TelegramChannel(BaseChannel):
                 if path.startswith(("http://", "https://")):
                     content, mime = await fetch_media(path, max_bytes=100_000_000)
                     kind = classify_media(mime)
+                    # Extract filename from URL
+                    filename = Path(path).name
                 else:
                     # Local file
                     file_path = Path(path)
@@ -266,6 +268,8 @@ class TelegramChannel(BaseChannel):
 
                     mime = detect_mime(path, content)
                     kind = classify_media(mime)
+                    # Extract filename from local path
+                    filename = file_path.name
 
                     # Optimize images
                     if kind == MediaKind.IMAGE:
@@ -274,7 +278,7 @@ class TelegramChannel(BaseChannel):
                         except Exception as e:
                             logger.warning(f"Image optimization failed: {e}, sending original")
 
-                processed_media.append((path, kind, content))
+                processed_media.append((path, kind, content, filename))
 
             except Exception as e:
                 logger.error(f"Failed to process media {path}: {e}")
@@ -290,7 +294,7 @@ class TelegramChannel(BaseChannel):
             return
 
         # Group media for album sending
-        media_items = [(path, kind) for path, kind, _ in processed_media]
+        media_items = [(path, kind) for path, kind, _, _ in processed_media]
         grouping = group_media_for_album(media_items)
 
         # Handle caption length (Telegram limit: 1024 chars)
@@ -307,7 +311,7 @@ class TelegramChannel(BaseChannel):
             album_paths = grouping["album"]
             album_media = []
 
-            for path, kind, content in processed_media:
+            for path, kind, content, filename in processed_media:
                 if path not in album_paths:
                     continue
 
@@ -335,7 +339,7 @@ class TelegramChannel(BaseChannel):
                 )
 
         # Send separate media
-        for i, (path, kind, content) in enumerate(processed_media):
+        for i, (path, kind, content, filename) in enumerate(processed_media):
             if path in grouping["album"]:
                 continue  # Already sent in album
 
@@ -361,14 +365,16 @@ class TelegramChannel(BaseChannel):
                     chat_id=chat_id,
                     audio=content,
                     caption=item_caption,
-                    parse_mode="HTML" if item_caption else None
+                    parse_mode="HTML" if item_caption else None,
+                    filename=filename
                 )
             elif kind == MediaKind.DOCUMENT:
                 await self._app.bot.send_document(
                     chat_id=chat_id,
                     document=content,
                     caption=item_caption,
-                    parse_mode="HTML" if item_caption else None
+                    parse_mode="HTML" if item_caption else None,
+                    filename=filename
                 )
 
         # Send follow-up text if caption was too long