Common utils functionalities

$3

Installation

npm i common-utils-functionalities

Usage

First, configure Express.js application with error handling middleware,

``
import express, { NextFunction, Request, Response } from "express";
import { ValidationChain, body, param, query } from "express-validator";
import {
errorHandler,
validateRequest,
responseGenerator,
NotFoundError,
} from "common-utils";

const app = express();

app.use(express.json());

const bodyValidation: ValidationChain[] = [
body("mobile")
.not()
.isEmpty()
.withMessage("Mobile Number is required")
.isMobilePhone("en-IN")
.withMessage("Invalid Mobile Number"),
body("age")
.not()
.isEmpty()
.withMessage("Age is required")
.isInt({ min: 1, max: 100 })
.withMessage("Invalid age"),
];

const paramsValidation: ValidationChain[] = [
param("mobile_number")
.not()
.isEmpty()
.withMessage("Mobile Number is required")
.isMobilePhone("en-IN")
.withMessage("Invalid Mobile Number"),
];

const queryValidation: ValidationChain[] = [
query("mobile_number")
.not()
.isEmpty()
.withMessage("Mobile Number is required")
.isMobilePhone("en-IN")
.withMessage("Invalid Mobile Number"),
query("age")
.not()
.isEmpty()
.withMessage("Age is required")
.isInt({ min: 1, max: 100 })
.withMessage("Invalid age"),
];

app.get(
"/dictionary/:mobile_number",
paramsValidation,
validateRequest,
(req: Request, res: Response, next: NextFunction) => {
const { mobile_number } = req.params;
return res.status(200).send(mobile_number);
}
);

app.get(
"/dictionary",
queryValidation,
validateRequest,
(req: Request, res: Response, NextFunction: NextFunction) => {
const { mobile_number, age } = req.query;
return res.status(200).send(${mobile_number} = ${age});
}
);

app.post(
"/dictionary",
bodyValidation,
validateRequest,
(req: Request, res: Response, next: NextFunction) => {
const { mobile } = req.body;

const mobileDictionary = [9657227905, 67890];

const isMobileFound = mobileDictionary.find((mobile) =>
mob === mobile ? true : false
);

if (isMobileFound) {
return res.status(200).json(responseGenerator({ data: [mobile] }));
}

throw new NotFoundError("Mobile number not found");
}
);

app.use(errorHandler);

app.listen(3000, () => {
console.log("Server Running on 3000", 3000);
});
`

Available classes and functions

throw new BadRequestError()

throw new ConflictError()

throw new DatabaseConnectionError()

throw new NotAuthorizedError()

throw new NotFoundError()

responseGenerator()`