add help command

src/extensions/help.py

@@ -0,0 +1,38 @@
+import hikari
+import arc
+import itertools
+
+plugin = arc.GatewayPlugin(name="Help Command Plugin")
+
+
+def gather_commands(client: arc.GatewayClient):
+    command_list = []
+    for command in itertools.chain(client.walk_commands(hikari.CommandType.SLASH)):
+        command_list.append(
+            {
+                "name": command.name,
+                "description": command.description or "No description provided.",
+            }
+        )
+    return command_list
+
+
+@plugin.include
+@arc.slash_command("help", "Displays a list of all commands.")
+async def help_command(ctx: arc.GatewayContext) -> None:
+    """Displays a simple list of all bot commands."""
+
+    commands = gather_commands(ctx.client)
+    embed = hikari.Embed(title="Bot Commands", color=0x00FF00)
+
+    for command in commands:
+        embed.add_field(
+            name=f"/{command['name']}", value=command["description"], inline=False
+        )
+
+    await ctx.respond(embed=embed)
+
+
+@arc.loader
+def load(client: arc.GatewayClient) -> None:
+    client.add_plugin(plugin)