feat(*): ✨ Feat an optimized type checker

This commit introduces a new and more precisely type checker than
the Javascript built-in typeof.

index.js

@@ -1,4 +1,4 @@
-const { useInjection } = require('./lib/use.injection');
+const { useInjection, typeOf } = require('./lib/use.injection');
 const { BadRequestError } = require('./lib/errors/bad-request.error');
 const { InternalServerError } = require('./lib/errors/internal-server.error');
 const { NotFoundError } = require('./lib/errors/not-found.error');
@@ -12,4 +12,5 @@ module.exports = {
   InternalServerError,
   NotFoundError,
   TwiMLResponse,
+  typeOf,
 };

lib/errors/bad-request.error.js

@@ -1,6 +1,6 @@
 /* global Twilio */
 
-exports.BadRequestError = class BadRequestError
+module.exports.BadRequestError = class BadRequestError
   extends Twilio.Response {
   constructor(body = 'The request sent to the server is invalid or corrupted!') {
     super({ statusCode: 400, body: `[ BadRequestError ]: ${body}` });

lib/errors/internal-server.error.js

@@ -1,6 +1,6 @@
 /* global Twilio */
 
-exports.InternalServerError = class InternalServerError
+module.exports.InternalServerError = class InternalServerError
   extends Twilio.Response {
   constructor(body = 'The server encountered an unexpected condition that prevented it from fulfilling the request!') {
     super({ statusCode: 500, body: `[ InternalServerError ]: ${body}` });

lib/errors/not-found.error.js

@@ -1,6 +1,6 @@
 /* global Twilio */
 
-exports.NotFoundError = class NotFoundError
+module.exports.NotFoundError = class NotFoundError
   extends Twilio.Response {
   constructor(body = 'The content you are looking for was not found!') {
     super({ statusCode: 404, body: `[ NotFoundError ]: ${body}` });

lib/errors/unauthorized.error.js

@@ -1,6 +1,6 @@
 /* global Twilio */
 
-exports.UnauthorizedError = class UnauthorizedError
+module.exports.UnauthorizedError = class UnauthorizedError
   extends Twilio.Response {
   constructor(body = 'The received request could not be verified!') {
     super({ statusCode: 401, body: `[ UnauthorizedError ]: ${body}` });

lib/responses/default.response.js

@@ -1,7 +1,7 @@
 /* global Twilio */
 /* eslint-disable no-constructor-return */
 
-exports.Response = class Response extends Twilio.Response {
+module.exports.Response = class Response extends Twilio.Response {
   constructor(body = '[ Success ]: Request returned a success response.', statusCode = 200) {
     super({ statusCode, body });
 

lib/responses/twiml.response.js

@@ -1,7 +1,7 @@
 /* global Twilio */
 /* eslint-disable no-constructor-return */
 
-exports.TwiMLResponse = class TwiMLResponse extends Twilio.Response {
+module.exports.TwiMLResponse = class TwiMLResponse extends Twilio.Response {
   constructor(body = '<?xml version="1.0" encoding="UTF-8"?><Response />', statusCode = 200) {
     super({ statusCode, body });
 

lib/use.injection.js

@@ -7,7 +7,7 @@ const { UnauthorizedError } = require('./errors/unauthorized.error');
 /**
  * @type { import('../types/use.injection').useInjection }
  */
-exports.useInjection = (fn, params) => async function (...args) {
+module.exports.useInjection = (fn, params) => async function (...args) {
   const [context, event, callback] = args;
   const { getTwilioClient, ...env } = context;
 
@@ -67,3 +67,17 @@ exports.useInjection = (fn, params) => async function (...args) {
     return callback(undefined, new InternalServerError(err.message));
   }
 };
+
+/**
+ * A more precisely type checker than Javascript built-in typeof.
+ *
+ * @param { * } o
+ * @returns { string }
+ */
+module.exports.typeOf = function (o) {
+  /**
+   * @type { string }
+   */
+  const stringTag = Object.prototype.toString.call(o);
+  return stringTag.match(/(?<=\[\D+ )[A-Za-z]+/).shift();
+};