setting up stuff

boilerplates/controller.js

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+require('dotenv').config();
+
+const typedefs = require("../typedefs");
+
+/**
+ * @param {typedefs.Req} req
+ * @param {typedefs.Res} res
+ */
+const __controller_func = async (req, res) => {
+	try {
+		
+	} catch (error) {
+		console.error(error);
+		return res.status(500).send({ message: "Server Error. Try again." });
+	}
+}
+
+module.exports = {
+	__controller_func
+};

boilerplates/route.js

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+const router = require('express').Router();
+
+const validator = require("../validators");
+
+router.get(
+
+);
+
+router.post(
+
+);
+
+module.exports = router;

boilerplates/validator.js

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+const { body, header, param, query } = require("express-validator");
+
+const typedefs = require("../typedefs");
+
+/**
+ * @param {typedefs.Req} req 
+ * @param {typedefs.Res} res 
+ * @param {typedefs.Next} next 
+ */
+const __validator_func = async (req, res, next) => {
+	await body('field_name')
+		.notEmpty()
+		.withMessage('field_name not defined in body')
+		.run(req);
+
+	next();
+}
+
+module.exports = {
+	__validator_func,
+}
+

index.js

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+require('dotenv').config();
+const express = require('express');
+const cors = require('cors');
+const cookieParser = require('cookie-parser');
+
+const app = express();
+
+app.use(cors());
+app.use(cookieParser());
+
+app.use(express.json());
+app.use(express.urlencoded({ extended: true }));
+
+app.use(express.static(__dirname + '/public'));
+
+app.use("/api/auth/", require("./routes/auth"));
+
+app.use((_req, res) => {
+	return res.status(404).send(
+		"Oops! You're not supposed to know about <a href=\"https://github.com/20kaushik02/spotify-manager\">this</a>..."
+	);
+})
+
+const port = process.env.PORT || 3000;
+
+app.listen(port, () => {
+	console.log(`App Listening on port ${port}`);
+});

package.json

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+{
+  "name": "spotify-manager",
+  "version": "1.0.0",
+  "description": "Personal Spotify playlist manager",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "dev": "nodemon index.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/20kaushik02/spotify-manager.git"
+  },
+  "author": "",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/20kaushik02/spotify-manager/issues"
+  },
+  "homepage": "https://github.com/20kaushik02/spotify-manager#readme",
+  "dependencies": {
+    "cookie-parser": "^1.4.6",
+    "cors": "^2.8.5",
+    "dotenv": "^16.0.1",
+    "express": "^4.18.1",
+    "express-validator": "^6.14.2",
+    "got": "^12.1.0"
+  },
+  "devDependencies": {
+    "@types/express": "^4.17.13",
+    "nodemon": "^2.0.19"
+  }
+}

typedefs.js

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+/**
+ * @typedef {import('express').Request} Req
+ * @typedef {import('express').Response} Res
+ * @typedef {import('express').NextFunction} Next
+ */
+
+exports.unused = {};

validators/index.js

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+const { validationResult } = require("express-validator");
+
+const typedefs = require("../typedefs");
+
+/**
+ * @param {typedefs.Req} req 
+ * @param {typedefs.Res} res 
+ * @param {typedefs.Next} next 
+ */
+const validate = (req, res, next) => {
+	const errors = validationResult(req);
+	if (errors.isEmpty()) {
+		return next();
+	}
+	const extractedErrors = []
+	errors.array().map(err => extractedErrors.push({
+		[err.param]: err.msg
+	}));
+
+	return res.status(400).json({
+		message: extractedErrors,
+	})
+}
+
+module.exports = {
+	validate,
+}