Create helper functions

src/server/util/error.js

@@ -0,0 +1,24 @@
+'use strict';
+
+/**
+ * Define error constants
+ */
+export const BAD_REQUEST = 400;
+export const CONFLICT = 409;
+export const NOT_FOUND = 404;
+export const GENERIC_ERROR = 500;
+
+/**
+ * Wrapper for javascript native Error() constructor
+ * 
+ * @param {String} message
+ * @param {number} status 
+ * 
+ * @returns {object} error
+ */
+export const createError = ({ message = 'Something went wrong, try again...', status = 500 }) => {
+	const error = new Error(message);
+	error.status = status;
+
+	return error;
+};

src/server/util/index.js

@@ -0,0 +1,4 @@
+// Export all utility files
+export { createError, BAD_REQUEST, CONFLICT, NOT_FOUND, GENERIC_ERROR } from './error';
+export { OK, CREATED, createSuccess } from './success';
+export { joiValidate } from './joiValidate';

src/server/util/joiValidate.js

@@ -0,0 +1,32 @@
+import Joi from '@hapi/joi';
+
+/**
+ * Validate request body 
+ * 
+ * @param {object} req 
+ * @param {object} res 
+ * @param {object} next 
+ * @param {object} schema 
+ */
+export const joiValidate = (req, res, next, schema) => {
+	// validate request body against predefined schema
+	const { error, value } = Joi.validate(req.body, schema, {
+		abortEarly: false
+	});
+
+	// check for validation error
+	if (error) {
+		// Format error object of JOI
+		const errors = error.details.map(current => ({
+			key: current.context.key,
+			message: current.message.replace(/['"]/g, '')
+		}));
+
+		return res.status(400).json({ errors });
+	}
+
+	//Note: create a new key `sanitizedBody` to the body with sanitized value
+	req.body.sanitizedBody = value;
+
+	next();
+};

src/server/util/success.js

@@ -0,0 +1,23 @@
+'use strict';
+
+/**
+ * Define success status constants
+ */
+export const CREATED = 201;
+export const OK = 200;
+
+/**
+ * Create success response data format wrapper
+ * 
+ * @param {object} { data, message } 
+ * 
+ */ export const createSuccess = ({
+	data,
+	message = 'successful'
+}) => {
+	return {
+		success: true,
+		message,
+		body: data
+	};
+};