Simple default role add on join

bot.py

@@ -1,10 +1,70 @@
-import discord
+import shelve
+from discord.ext import commands
+
+bot = commands.Bot(command_prefix="%")
 
 
-class Bot(discord.Client):
-    async def on_ready(self):
-        print("FurrMula Bot online !")
+def set_config(guild, conf):
+    print(f"Set config for {guild.name}")
+    conf[str(guild.id)] = dict()
+    for opt in ["default_role_id"]:
+        conf[str(guild.id)][opt] = ""
+
+
+@bot.event
+async def on_ready():
+    with shelve.open("config.conf", writeback=True) as conf:
+        for g in bot.guilds:
+            if str(g.id) not in conf:
+                set_config(g, conf)
+
+    print("FurrMula Bot online !")
+
+
+@bot.event
+async def on_guild_join(guild):
+    with shelve.open("config.conf", writeback=True) as conf:
+        set_config(guild, conf)
+
+
+@bot.event
+async def on_member_join(member):
+    print(1)
+    with shelve.open("config.conf") as conf:
+        print(2)
+        print(conf[str(member.guild.id)]["default_role_id"])
+        if "default_role_id" in conf[str(member.guild.id)] and conf[str(member.guild.id)]["default_role_id"]:
+            print(3)
+            role = member.guild.get_role(conf[str(member.guild.id)]["default_role_id"])
+            print(4)
+            await member.add_roles(role)
+            print(5)
+
+
+@bot.command()
+async def shutdown(ctx):
+    await ctx.send("Shutdown !")
+    await bot.logout()
+    await bot.close()
+
+
+@bot.command()
+async def set_default_role(ctx):
+    with shelve.open("config.conf", writeback=True) as conf:
+        if len(ctx.message.role_mentions) == 1:
+            conf[str(ctx.guild.id)]["default_role_id"] = ctx.message.role_mentions[0].id
+            await ctx.send(f"Role {ctx.message.role_mentions[0].name} set to default role")
+        elif len(ctx.message.role_mentions) == 0:
+            conf[str(ctx.guild.id)]["default_role_id"] = ""
+            await ctx.send("Default role disabled")
+        else:
+            await ctx.send("Too many roles !")
+
+
+@bot.command()
+async def default_role(ctx):
+    with shelve.open("config.conf") as conf:
+        await ctx.send(conf[str(ctx.guild.id)]["default_role_id"])
 
 
-bot = Bot()
 bot.run(open("token.ini").read())