reminder-llm

import * as path from "path";
import * as fs from "fs";
import * as os from "os";

const DB_FILE = "reminders.json";

interface Reminder {
  id: number;
  datetime: string;
  message: string;
  created_at: string;
}

interface Database {
  reminders: Reminder[];
  nextId: number;
}

let db: Database | null = null;

function getDbPath(): string {
  const home = os.homedir();
  const dir = path.join(home, ".lmstudio", "plugin-data", "reminder-llm");
  fs.mkdirSync(dir, { recursive: true });
  return path.join(dir, DB_FILE);
}

function loadDb(): Database {
  if (db) return db;
  const p = getDbPath();
  if (fs.existsSync(p)) {
    db = JSON.parse(fs.readFileSync(p, "utf-8"));
  } else {
    db = { reminders: [], nextId: 1 };
  }
  return db!;
}

function saveDb(): void {
  if (!db) return;
  fs.writeFileSync(getDbPath(), JSON.stringify(db, null, 2), "utf-8");
}

export async function addReminder(datetime: string, message: string, remindBefore: number = 0): Promise<number> {
  const d = loadDb();
  const id = d.nextId++;
  d.reminders.push({ id, datetime, message, created_at: new Date().toISOString() });
  saveDb();
  return id;
}

export async function getAllReminders(): Promise<Reminder[]> {
  return loadDb().reminders.sort((a, b) => new Date(a.datetime).getTime() - new Date(b.datetime).getTime());
}

export async function deleteReminder(id: number): Promise<boolean> {
  const d = loadDb();
  const i = d.reminders.findIndex(r => r.id === id);
  if (i > -1) { d.reminders.splice(i, 1); saveDb(); return true; }
  return false;
}

export async function deleteAllReminders(): Promise<number> {
  const d = loadDb();
  const c = d.reminders.length;
  d.reminders = [];
  d.nextId = 1;
  saveDb();
  return c;
}

export async function updateReminder(id: number, datetime?: string, message?: string): Promise<boolean> {
  const d = loadDb();
  const r = d.reminders.find(r => r.id === id);
  if (!r) return false;
  if (datetime !== undefined) r.datetime = datetime;
  if (message !== undefined) r.message = message;
  saveDb();
  return true;
}