Update send highscore message to be more robust.

utilities/utils.py

@@ -10,6 +10,7 @@ from sqlmodel import col
 
 from database.db import engine
 from database.models import Category, CategoryGroup, Guild, Score
+from main import agon_logger
 
 MAX_LINE_LENGTH = 142
 
@@ -327,7 +328,9 @@ def get_time_str(time_in: float) -> str:
     return time.strftime(f"%-M:%S.{milliseconds}", time.gmtime(time_in))
 
 
-async def send_highscore_message(session: Session, guild: nextcord.Guild, group: CategoryGroup) -> nextcord.Message:
+async def send_highscore_message(
+    session: Session, guild: nextcord.Guild, group: CategoryGroup
+) -> nextcord.Message | None:
     """
     Function takes care of checking if a message exists for a group.
 
@@ -339,11 +342,17 @@ async def send_highscore_message(session: Session, guild: nextcord.Guild, group:
         group (CategoryGroup): group to post to the message.
 
     Returns:
-        nextcord.Message: Message object that was posted with group contents.
+        nextcord.Message: Message object that was posted with group contents. None if cannot send message.
     """
     highscore_string = format_highscore_message(session, group)
     channel = guild.get_channel(group.channel_id)
 
+    if not isinstance(channel, nextcord.TextChannel):
+        agon_logger.error(
+            "Channel id %s in guild %s is does not correspond to a TextChannel.", channel.id, channel.guild.id
+        )
+        return None
+
     if group.message_id is None:
         # message doesn't exist.
         message: nextcord.Message = await channel.send(highscore_string)