chore: initial import to Nexus_Edu

src/lib/db.ts

@@ -0,0 +1,35 @@
+
+// This file would typically use mysql2/promise
+// import mysql from 'mysql2/promise';
+
+// Mock DB Configuration storage (In-memory for demo, use env vars in prod)
+let dbConfig = {
+    host: 'localhost',
+    port: 3306,
+    user: 'root',
+    password: '',
+    database: 'edunexus'
+};
+
+// Mock Connection Pool
+export const db = {
+    query: async (sql: string, params?: any[]) => {
+        // In a real app:
+        // const connection = await mysql.createConnection(dbConfig);
+        // const [rows] = await connection.execute(sql, params);
+        // return rows;
+        
+        console.log(`[MockDB] Executing SQL: ${sql}`, params);
+        return [];
+    },
+    testConnection: async (config: typeof dbConfig) => {
+        // Simulate connection attempt
+        await new Promise(resolve => setTimeout(resolve, 1000));
+        if (config.host === 'error') throw new Error('Connection timed out');
+        
+        // Update active config
+        dbConfig = config;
+        return true;
+    },
+    getConfig: () => dbConfig
+};