新增資料庫、用戶註冊、登入的功能

database_connection_test.js

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+const mysql = require('mysql2/promise');
+
+// 資料庫配置
+const dbConfig = {
+  host: 'mysql.theaken.com',
+  port: 33306,
+  user: 'AI_Platform',
+  password: 'Aa123456',
+  database: 'db_AI_Platform',
+  charset: 'utf8mb4',
+  timezone: '+08:00'
+};
+
+async function testDatabaseConnection() {
+  let connection;
+  
+  try {
+    console.log('🔌 正在連接資料庫...');
+    console.log(`主機: ${dbConfig.host}:${dbConfig.port}`);
+    console.log(`資料庫: ${dbConfig.database}`);
+    console.log(`用戶: ${dbConfig.user}`);
+    
+    // 建立連接
+    connection = await mysql.createConnection(dbConfig);
+    
+    console.log('✅ 資料庫連接成功!');
+    
+    // 測試查詢
+    const [rows] = await connection.execute('SELECT VERSION() as version');
+    console.log(`📊 MySQL版本: ${rows[0].version}`);
+    
+    // 檢查資料表
+    const [tables] = await connection.execute(`
+      SELECT TABLE_NAME, TABLE_ROWS 
+      FROM information_schema.tables 
+      WHERE table_schema = '${dbConfig.database}'
+      ORDER BY TABLE_NAME
+    `);
+    
+    console.log('\n📋 資料表列表:');
+    console.log('─'.repeat(50));
+    tables.forEach(table => {
+      console.log(`${table.TABLE_NAME.padEnd(25)} | ${table.TABLE_ROWS || 0} 筆記錄`);
+    });
+    
+    // 檢查用戶數量
+    const [userCount] = await connection.execute('SELECT COUNT(*) as count FROM users');
+    console.log(`\n👥 用戶數量: ${userCount[0].count}`);
+    
+    // 檢查競賽數量
+    const [compCount] = await connection.execute('SELECT COUNT(*) as count FROM competitions');
+    console.log(`🏆 競賽數量: ${compCount[0].count}`);
+    
+    // 檢查評審數量
+    const [judgeCount] = await connection.execute('SELECT COUNT(*) as count FROM judges');
+    console.log(`👨‍⚖️ 評審數量: ${judgeCount[0].count}`);
+    
+    console.log('\n🎉 資料庫連接測試完成!');
+    
+  } catch (error) {
+    console.error('❌ 資料庫連接失敗:', error.message);
+    console.error('請檢查以下項目:');
+    console.error('1. 資料庫主機是否可達');
+    console.error('2. 連接埠是否正確');
+    console.error('3. 用戶名和密碼是否正確');
+    console.error('4. 資料庫是否存在');
+    console.error('5. 用戶是否有足夠權限');
+  } finally {
+    if (connection) {
+      await connection.end();
+      console.log('🔌 資料庫連接已關閉');
+    }
+  }
+}
+
+// 執行測試
+testDatabaseConnection();