refactor: 重构lib代码（无实质性功能更新，可不更新）

lib/db/core.js

@@ -0,0 +1,44 @@
+import { readFileSync, writeFileSync } from 'fs';
+import path from 'path';
+import { checkFolderExistAndCreate } from '../../utils/file.js';
+import { dataPath } from '../path.js';
+export const dbPath = {
+  gacha: 'gacha',
+  panel: 'panel',
+};
+
+/**
+ * 读取数据库
+ * @param {keyof dbPath} dbName
+ * @param {string} dbFile
+ * @returns {object | Array<object> | null}
+ */
+export function getDB(dbName, dbFile) {
+  const db = dbPath[dbName];
+  const dbFolder = path.join(dataPath, db);
+  try {
+    const dbPath = path.join(dbFolder, `${dbFile}.json`);
+    return JSON.parse(readFileSync(dbPath, 'utf-8'));
+  } catch (error) {
+    logger.debug(`读取数据库失败: ${error.message}`);
+    return null;
+  }
+}
+
+/**
+ * 写入数据库
+ * @param {string} dbName
+ * @param {string} dbFile
+ * @param {object} data
+ */
+export function setDB(dbName, dbFile, data) {
+  const db = dbPath[dbName];
+  const dbFolder = path.join(dataPath, db);
+  try {
+    checkFolderExistAndCreate(dbFolder);
+    const dbPath = path.join(dbFolder, `${dbFile}.json`);
+    writeFileSync(dbPath, JSON.stringify(data, null, 2));
+  } catch (error) {
+    logger.debug(`读取数据库失败: ${error.message}`);
+  }
+}