feat: add a discord bot interface.

src/nbb/bot_discord.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+import os
+
+from nbb.models import get_message
+from nbb.config import get_config
+import discord
+from discord.ext import commands
+
+intents = discord.Intents.default()
+intents.message_content = True
+
+bot = commands.Bot(command_prefix="!", intents=intents)
+
+CONF = get_config()
+
+DISCORD_TOKEN = os.environ.get("DISCORD_TOKEN", None) or CONF["discord"]["token"]
+
+
+@bot.command(
+    help="Get next bus at some stops.",
+    brief="Get next bus at some stops.",
+)
+async def nbb(ctx, *args):
+    """Get next bus from the command line."""
+    if len(args) == 0:
+        args = [None]
+    await ctx.channel.send(get_message(CONF, args[0]))
+
+
+bot.run(DISCORD_TOKEN)