import fs, { mkdir } from "node:fs/promises";
import path from "node:path";
export type AppState = {
accessToken: string;
refreshToken: string;
apiKeys: Record<string, string>;
};
const DEFAULT_APP_STATE: AppState = {
accessToken: "",
refreshToken: "",
apiKeys: {},
};
const home = process.env.HOME || process.env.USERPROFILE;
if (!home) {
throw new Error("Could not find home directory");
}
const STORAGE_PATH = path.join(home, ".algolia-mcp");
const APP_STATE_PATH = path.join(STORAGE_PATH, "state.json");
let SINGLETON: AppStateManager | null = null;
export class AppStateManager {
#appState: AppState;
static async load() {
if (!SINGLETON) {
await mkdir(STORAGE_PATH, { recursive: true });
let content: Partial<AppState> = {};
try {
content = JSON.parse(await fs.readFile(APP_STATE_PATH, "utf-8")) as Partial<AppState>;
} catch {
console.error(`Could not read app state file at ${APP_STATE_PATH}. Using default state.`);
}
SINGLETON = new AppStateManager({ ...DEFAULT_APP_STATE, ...content });
}
return SINGLETON;
}
static async reset(): Promise<void> {
SINGLETON = null;
await fs.rmdir(STORAGE_PATH, { recursive: true });
}
constructor(initialState: AppState) {
this.#appState = initialState;
}
get<K extends keyof AppState>(key: K): AppState[K] {
return this.#appState[key];
}
async update(update: Partial<AppState>) {
this.#appState = { ...this.#appState, ...update };
await fs.writeFile(APP_STATE_PATH, JSON.stringify(this.#appState));
}
}
