Business logic of User API

userService.js

const express = require("express");
const userModel = require("../../models/user");

/*List of Functions

1)  getUsers
2)  createUser

*/

const getUsers = async (req, res, next) => {
    try {

        let users = await userModel.find({});
        if (users.length > 0) {
            return res.status(200).json({
                'message': 'Data loaded successfully',
                'data': users
            });
        }

        return res.status(404).json({
            'code': 'Bad_Request',
            'description': 'No Data Found'
        });

    } catch (error) {
        return res.status(500).json({
            'code': 'Internal_Server_Error',
            'description': 'Some Internal Server Error. Please Try Again.'
        });
    }
};

const createUser = async (req, res, next) => {
    try {

        const {
            name,
            email
        } = req.body;

        if (name === undefined || name === '') {
            return res.status(422).json({
                'code': 'REQUIRED_FIELD_MISSING',
                'description': 'name is required',
                'field': 'name'
            });
        }

        if (email === undefined || email === '') {
            return res.status(422).json({
                'code': 'REQUIRED_FIELD_MISSING',
                'description': 'email is required',
                'field': 'email'
            });
        }


        let isEmailExists = await userModel.findOne({
            "email": email
        });

        if (isEmailExists) {
            return res.status(409).json({
                'code': 'ENTITY_ALREAY_EXISTS',
                'description': 'email already exists',
                'field': 'email'
            });
        }

        const temp = {
            name: name,
            email: email
        }

        let newUser = await userModel.create(temp);

        if (newUser) {
            return res.status(201).json({
                'message': 'user created successfully',
                'data': newUser
            });
        } else {
            throw new Error('something went worng');
        }
    } catch (error) {
        return res.status(500).json({
            'code': 'SERVER_ERROR',
            'description': 'something went wrong, Please try again'
        });
    }
};



module.exports = {
    getUsers: getUsers,
    createUser: createUser

};