feat(chatops/takumi): give it ollama powers

Those are not superpowers and should be used sparringly and responsibly.
LLMs are not bulletproof. They are mostly bullshit generators.

But even a bullshit generator has usefulness.

Signed-off-by: Ryan Lahfa <ryan@dgnum.eu>

modules/dgn-chatops/default.nix

@@ -47,6 +47,7 @@ let
   ps = python3Pkgs.makePythonPath [
     ircrobots
     tortoise-orm
+    python3Pkgs.ollama
     python3Pkgs.aiohttp
   ];
 in

modules/dgn-chatops/takumi.py

@@ -1,6 +1,11 @@
 #!/usr/bin/env python3
 import asyncio
 
+from ircrobots.interface import IBot
+from ollama import Client as OllamaClient
+from loadcredential import Credentials
+import base64
+
 from irctokens.line import build, Line
 from ircrobots.bot import Bot as BaseBot
 from ircrobots.server import Server as BaseServer
@@ -56,6 +61,10 @@ def bridge_stripped(possible_command: str, origin_nick: str) -> str | None:
         return possible_command if possible_command.startswith(TRIGGER) else None
 
 class Server(BaseServer):
+    def __init__(self, bot: IBot, name: str, llm_client: OllamaClient):
+        super().__init__(bot, name)
+        self.llm_client = llm_client
+
     def extract_valid_command(self, line: Line) -> str | None:
         me = self.nickname_lower
         if line.command == "PRIVMSG" and \
@@ -106,7 +115,11 @@ class Server(BaseServer):
 
 class Bot(BaseBot):
     def create_server(self, name: str):
-        return Server(self, name)
+        credentials = Credentials()
+        base64_encoded_password = base64.b64encode(credentials["OLLAMA_PROXY_PASSWORD"])
+        token = f"takumi:{base64_encoded_password}"
+        llm_client = OllamaClient(host='https://ollama01.beta.dgnum.eu', headers={'Authorization': f'Basic {token}'})
+        return Server(self, name, llm_client)
 
 async def main():
     bot = Bot()