Update saving functions.

data/highscores_data.py

@@ -108,10 +108,21 @@ class HighscoresData:
                 guild_obj: Guild = Guild.from_dict(guild_id, json.load(file))
                 self._guild_map[guild_obj.guild_id] = guild_obj
 
-    def save_highscores_data(self):
+    def save_all_data(self) -> None:
         """
-        Saves each Guild object into its own json data file.
+        Calls save_guild_data for each guild tracked in guild map.
         """
-        for guild_id, guild_obj in self._guild_map.items():
-            with open(f"{HIGHSCORES_DATA_DIR}/{guild_id}.json", encoding="utf-8", mode="w") as file:
-                file.write(guild_obj)  # should use str function
+        for guild in self.guilds:
+            self.save_guild_data(guild)
+
+    def save_guild_data(self, guild: Guild) -> None:
+        """
+        Saves a guild to its own json file.
+
+        Args:
+            guild (Guild): Guild to save
+        """
+        with open(
+            f"{HIGHSCORES_DATA_DIR}/{guild.guild_id}.json", encoding="utf-8", mode="w"
+        ) as file:
+            file.write(guild)  # should use str function