refactor(discord-bot): improve project structure

apps/discord-bot/src/services/account.ts

@@ -0,0 +1,34 @@
+import { readFile, writeFile, access } from "node:fs/promises";
+import { constants } from "node:fs";
+
+const ACCOUNTS_FILE = "./.cache/accounts.json";
+
+export const initAccounts = async (): Promise<void> => {
+  try {
+    await access(ACCOUNTS_FILE, constants.F_OK);
+  } catch {
+    await writeFile(ACCOUNTS_FILE, "{}");
+  }
+};
+
+export const getAccountBalance = async (playerId: string): Promise<number> => {
+  const content = await readFile(ACCOUNTS_FILE, "utf-8");
+  const accounts: Record<string, number> = JSON.parse(content);
+  if (accounts[playerId]) return accounts[playerId];
+
+  accounts[playerId] = 0;
+  await writeFile(ACCOUNTS_FILE, JSON.stringify(accounts));
+
+  return 0;
+};
+
+export const setAccountBalance = async (
+  playerId: string,
+  balance: number,
+): Promise<void> => {
+  const content = await readFile(ACCOUNTS_FILE, "utf-8");
+  const accounts: Record<string, number> = JSON.parse(content);
+  accounts[playerId] = balance;
+
+  await writeFile(ACCOUNTS_FILE, JSON.stringify(accounts));
+};