feat: App.HostName is now optional

Signed-off-by: mctaylors <cantsendmails@mctaylors.ru>

config.ini

@@ -11,6 +11,7 @@ SourceUrl =
 Name = Danbooru
 ; Host (without http://) used to access the application API.
 Host = danbooru.donmai.us
-; Public host name (without http://) for the “Open in [App.Name]” button.
+; (Optional) Public host name (without http://) for the “Open in [App.Name]” button.
 ; Useful if the bot is hosted on the same server as the application.
-HostName = danbooru.donmai.us
+; If not set, [App.Host] will be used instead.
+HostName =

inline_query.py

@@ -38,10 +38,12 @@ async def answer_query(update: Update, query: str,
     copyrights = humanize_tags_from_json(data['tag_string_copyright'], "unknown copyright")
     artists = humanize_tags_from_json(data['tag_string_artist'], "unknown artist")
     rating = format_rating(data['rating'])
+    hostname = config.get('App', 'HostName')
+    hostname = hostname if hostname != "" else config.get('App', 'Host')
     keyboard = [
         [
             InlineKeyboardButton(f"Open in {config.get('App', 'Name')}",
-                                 url=f"https://{config.get('App', 'HostName')}/posts/{query}"),
+                                 url=f"https://{hostname}/posts/{query}"),
             InlineKeyboardButton("View original", url=data['file_url'])
         ]
     ]

main.py

@@ -34,7 +34,6 @@ def main() -> None:
 
 
 def validate_config() -> None:
-    # TODO: do some HostName checks or something
     # noinspection PyBroadException
     try:
         response = requests.get(f"http://{config.get('App', 'Host')}/status.json")