refactor: migrate entire project to TypeScript

utils/database.ts

@@ -1,50 +1,49 @@
-const Database = require('better-sqlite3');
-const path = require('path');
+import Database from 'better-sqlite3';
+import path from 'path';
 
 class DatabaseWrapper {
+  private db: Database.Database;
+  private dbPath: string;
+
   constructor() {
     this.dbPath = process.env.DB_PATH || path.join(__dirname, '../data/database.sqlite');
     this.db = new Database(this.dbPath, { verbose: console.log });
   }
 
-  // 查询单个记录
-  get(sql, params = []) {
+  get<T = any>(sql: string, params: any[] = []): T | undefined {
     try {
       const stmt = this.db.prepare(sql);
-      return stmt.get(params);
+      return stmt.get(params) as T | undefined;
     } catch (error) {
       console.error('数据库查询错误:', error);
       throw error;
     }
   }
 
-  // 查询多个记录
-  all(sql, params = []) {
+  all<T = any>(sql: string, params: any[] = []): T[] {
     try {
       const stmt = this.db.prepare(sql);
-      return stmt.all(params);
+      return stmt.all(params) as T[];
     } catch (error) {
       console.error('数据库查询错误:', error);
       throw error;
     }
   }
 
-  // 执行插入、更新、删除操作
-  run(sql, params = []) {
+  run(sql: string, params: any[] = []): { id: number; changes: number } {
     try {
       const stmt = this.db.prepare(sql);
       const result = stmt.run(params);
-      return { id: result.lastInsertRowid, changes: result.changes };
+      return { id: result.lastInsertRowid as number, changes: result.changes };
     } catch (error) {
       console.error('数据库操作错误:', error);
       throw error;
     }
   }
 
-  // 关闭数据库连接
-  close() {
+  close(): void {
     this.db.close();
   }
 }
 
-module.exports = new DatabaseWrapper();
+export default new DatabaseWrapper();