Implement reply_image in Telegram serfs

royalnet/commands/commanddata.py

@@ -3,6 +3,7 @@ import contextlib
 import logging
 import asyncio as aio
 import royalnet.utils as ru
+import io
 from .errors import UnsupportedError
 from .commandinterface import CommandInterface
 from royalnet.backpack.tables.aliases import Alias
@@ -51,6 +52,14 @@ class CommandData:
              text: The text to be sent, possibly formatted in the weird undescribed markup that I'm using."""
         raise UnsupportedError(f"'{self.reply.__name__}' is not supported")
 
+    async def reply_image(self, image: io.IOBase, caption: str) -> None:
+        """Send an image (with optionally a caption) to the channel where the call was made.
+
+        Parameters:
+            image: The bytes of the image to send.
+            caption: The caption to attach to the image."""
+        raise UnsupportedError(f"'{self.reply_image.__name__}' is not supported")
+
     async def get_author(self, error_if_none: bool = False):
         """Try to find the identifier of the user that sent the message.
         That probably means, the database row identifying the user.

royalnet/serf/telegram/telegramserf.py

@@ -8,7 +8,7 @@ import royalnet.utils as ru
 import royalnet.backpack.tables as rbt
 from .escape import escape
 from ..serf import Serf
-
+import io
 import telegram
 import urllib3
 from telegram.utils.request import Request as TRequest
@@ -117,6 +117,13 @@ class TelegramSerf(Serf):
                                     parse_mode="HTML",
                                     disable_web_page_preview=True)
 
+            async def reply_image(data, image: io.IOBase, caption: str) -> None:
+                await self.api_call(data.message.chat.send_photo,
+                                    photo=image,
+                                    caption=escape(caption),
+                                    parse_mode="HTML",
+                                    disable_web_page_preview=True)
+
             async def get_author(data, error_if_none=False):
                 user: Optional[telegram.User] = data.message.from_user
                 if user is None: