Re modify code structure

Author: gauraang01

.env_sample

@@ -0,0 +1,5 @@
+DATABASE=mydb
+ENDPOINT=MYSQL_ENDPOINT
+PASSWORD=PASSWORD
+MYSQL_PORT=3306
+USER=admnin

index.js

@@ -4,13 +4,14 @@
   "description": "Api to prcoess json and store it on RDS",
   "main": "index.js",
   "scripts": {
-    "start": "node index.js"
+    "start": "node ./src/index.js"
   },
   "author": "Gauraang",
   "license": "ISC",
   "dependencies": {
     "dotenv": "^16.0.3",
     "express": "^4.18.2",
-    "mysql": "^2.18.1"
+    "mysql": "^2.18.1",
+    "mysql2": "^2.3.3"
   }
 }

package-lock.json

@@ -0,0 +1,45 @@
+const {addData, showUsersTable, clearUsersTable} = require('../../db/models/users');
+
+const express = require('express');
+const { json } = require('express');
+const router = express.Router();
+router.use(express.json());
+
+router.get('/', (req, res) => {
+    res.status(200).send("You have reached the home page");
+})
+
+router.get('/show', async (req,res) => {
+    try{
+        const table = await showUsersTable();
+        console.log("Table returned successfully");
+        res.send(table);
+    }catch(error){
+        res.status(500).send({ error: 'An error occurred while fetching users' });
+    }
+})
+
+router.post('/clear', async (req, res) => {
+    try{
+        await clearUsersTable();
+        console.log("Table cleared successfully");
+        res.send("Table cleared successfuly");
+    }catch(error){
+        res.status(500).send({ error: 'An error occurred while fetching users' });
+    }
+})
+
+
+router.post('/data', async (req,res) => {
+    const json = req.body;
+    try{
+        await addData(json);
+        console.log("Data added to the table successfully");
+        res.send("Data added to the table successfully");
+    }catch(error){
+        console.log(error);
+        res.status(500).send({ error: 'An error occurred while adding data' });
+    }
+})
+
+module.exports = router;

package.json

@@ -0,0 +1,61 @@
+require('dotenv').config()
+const mysql = require('mysql2/promise');
+
+console.log(process.env.ENDPOINT);
+const pool = mysql.createPool({
+  host: process.env.ENDPOINT,
+  user: process.env.USER,
+  password: process.env.PASSWORD,
+  database: process.env.DATABASE,
+  port: process.env.MYSQL_PORT,
+  waitForConnections: true,
+  connectionLimit: 10,
+  queueLimit: 0
+});
+
+
+// Query function
+async function query(sql, params) {
+  try {
+    // Get a connection from the pool
+    const connection = await pool.getConnection();
+    // Use the connection to run the query
+    const [rows] = await connection.query(sql, params);
+    // Release the connection back to the pool
+    connection.release();
+    return rows;
+  } catch (error) {
+    console.error(error);
+    throw error;
+  }
+}
+
+
+
+  async function createTable(tableName, schema){
+    const sql = `
+        CREATE TABLE ${tableName} (
+        ${schema}
+        )
+    `;
+    await query(sql);
+}
+
+async function showTable(tableName){
+    const sql = `select * from ${tableName}`
+    const table =  await query(sql);
+    return table;
+}
+
+async function clearTable(tableName){
+    const sql = `TRUNCATE TABLE ${tableName}`;
+    await query(sql);
+}
+
+
+module.exports = {
+    query,
+    createTable,
+    showTable,
+    clearTable,
+  };