refactor: extract duplicate command hash logic into _compute_command_hash (#31)

Both _should_sync_commands and _save_command_hash contained an identical
~35-line block building the command data list and computing the SHA-256 hash.
Extracted into a new synchronous helper method _compute_command_hash() that
both callers now delegate to.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bot.py

@@ -220,43 +220,45 @@ class SBABot(commands.Bot):
                 f"❌ Failed to initialize background tasks: {e}", exc_info=True
             )
 
+    def _compute_command_hash(self) -> str:
+        """Compute a hash of the current command tree for change detection."""
+        commands_data = []
+        for cmd in self.tree.get_commands():
+            # Handle different command types properly
+            cmd_dict = {}
+            cmd_dict["name"] = cmd.name
+            cmd_dict["type"] = type(cmd).__name__
+
+            # Add description if available (most command types have this)
+            if hasattr(cmd, "description"):
+                cmd_dict["description"] = cmd.description  # type: ignore
+
+            # Add parameters for Command objects
+            if isinstance(cmd, discord.app_commands.Command):
+                cmd_dict["parameters"] = [
+                    {
+                        "name": param.name,
+                        "description": param.description,
+                        "required": param.required,
+                        "type": str(param.type),
+                    }
+                    for param in cmd.parameters
+                ]
+            elif isinstance(cmd, discord.app_commands.Group):
+                # For groups, include subcommands
+                cmd_dict["subcommands"] = [subcmd.name for subcmd in cmd.commands]
+
+            commands_data.append(cmd_dict)
+
+        commands_data.sort(key=lambda x: x["name"])
+        return hashlib.sha256(
+            json.dumps(commands_data, sort_keys=True).encode()
+        ).hexdigest()
+
     async def _should_sync_commands(self) -> bool:
         """Check if commands have changed since last sync."""
         try:
-            # Create hash of current command tree
-            commands_data = []
-            for cmd in self.tree.get_commands():
-                # Handle different command types properly
-                cmd_dict = {}
-                cmd_dict["name"] = cmd.name
-                cmd_dict["type"] = type(cmd).__name__
-
-                # Add description if available (most command types have this)
-                if hasattr(cmd, "description"):
-                    cmd_dict["description"] = cmd.description  # type: ignore
-
-                # Add parameters for Command objects
-                if isinstance(cmd, discord.app_commands.Command):
-                    cmd_dict["parameters"] = [
-                        {
-                            "name": param.name,
-                            "description": param.description,
-                            "required": param.required,
-                            "type": str(param.type),
-                        }
-                        for param in cmd.parameters
-                    ]
-                elif isinstance(cmd, discord.app_commands.Group):
-                    # For groups, include subcommands
-                    cmd_dict["subcommands"] = [subcmd.name for subcmd in cmd.commands]
-
-                commands_data.append(cmd_dict)
-
-            # Sort for consistent hashing
-            commands_data.sort(key=lambda x: x["name"])
-            current_hash = hashlib.sha256(
-                json.dumps(commands_data, sort_keys=True).encode()
-            ).hexdigest()
+            current_hash = self._compute_command_hash()
 
             # Compare with stored hash
             hash_file = ".last_command_hash"
@@ -276,39 +278,7 @@ class SBABot(commands.Bot):
     async def _save_command_hash(self):
         """Save current command hash for future comparison."""
         try:
-            # Create hash of current command tree (same logic as _should_sync_commands)
-            commands_data = []
-            for cmd in self.tree.get_commands():
-                # Handle different command types properly
-                cmd_dict = {}
-                cmd_dict["name"] = cmd.name
-                cmd_dict["type"] = type(cmd).__name__
-
-                # Add description if available (most command types have this)
-                if hasattr(cmd, "description"):
-                    cmd_dict["description"] = cmd.description  # type: ignore
-
-                # Add parameters for Command objects
-                if isinstance(cmd, discord.app_commands.Command):
-                    cmd_dict["parameters"] = [
-                        {
-                            "name": param.name,
-                            "description": param.description,
-                            "required": param.required,
-                            "type": str(param.type),
-                        }
-                        for param in cmd.parameters
-                    ]
-                elif isinstance(cmd, discord.app_commands.Group):
-                    # For groups, include subcommands
-                    cmd_dict["subcommands"] = [subcmd.name for subcmd in cmd.commands]
-
-                commands_data.append(cmd_dict)
-
-            commands_data.sort(key=lambda x: x["name"])
-            current_hash = hashlib.sha256(
-                json.dumps(commands_data, sort_keys=True).encode()
-            ).hexdigest()
+            current_hash = self._compute_command_hash()
 
             # Save hash to file
             with open(".last_command_hash", "w") as f: