ready-to-go-node-template/template/src/utils/response-handler.js

A node boilerplate template with built-in support for socket and MongoDB using Mongoose.

/**
 * response handlers
 */

class ResponseHandler {

    successResponse = (res, data = {}, message = '', statusCode = 200) => {
        return res.status(statusCode).json({
            status_code: statusCode,
            status: true,
            message: message,
            data: data
        });
    }

    errorResponse = (res, error, message, statusCode) => {
        const err = (Object.keys(error).length === 0 && error.constructor === Object) || (Array.isArray(error) && error.length === 0) ? error : {};

        let params = {
            status_code: 500,
            status: false,
            message: error.message,
            data: err
        }

        if (message) {
            params.message = message;
            params.status_code = 400;
        }
        if (statusCode) params.status_code = statusCode
        
        if (error.code == 11000) {
            params.status_code = 400
            params.message = `${Object.keys(error.keyValue)} already exists`
        }
        return res.status(params.status_code).json(params);
    }
}

export const responseHandler = new ResponseHandler();