feat: extend the response module, provide the json, status, and setHe…

…aders method which are made ch

src/modules/Response.js

@@ -0,0 +1,71 @@
+/**
+ *@module Response
+*/
+import {ServerResponse as Response} from 'http';
+import Util from './Util';
+
+/**
+ * catch the built in setHeader and setHeaders method.
+*/
+const setHeader = Response.prototype.setHeader;
+
+/**
+ * make the setHeader method chainable
+ *@returns {this}
+*/
+Response.prototype.setHeader = function(name, value) {
+    setHeader.call(this, name, value);
+    return this;
+};
+
+/**
+ * make the setHeaders method chainable
+ *@returns {this}
+*/
+Response.prototype.setHeaders = function(headers) {
+
+    if (Util.isPlainObject(headers)) {
+        Object.entries(headers).forEach(current => {
+            setHeader.call(this, ...current);
+        });
+    }
+
+    return this;
+};
+
+/**
+ * sets the status code for the response
+ *@param {int} code - status code
+ *@returns {this}
+*/
+Response.prototype.status = function(code) {
+    this.statusCode = code;
+    return this;
+};
+
+/**
+ * sends json content back to the browser
+ *@param {string|Object} data - json string or json object
+ *@returns {this}
+*/
+Response.prototype.json = function(data) {
+    if (typeof data !== 'string')
+        data = JSON.stringify(data);
+
+    this.setHeader('Content-Type', 'application/json').end(data);
+    return this;
+};
+
+/**
+ * sends file intended for download to the client
+ *@param {string} filePath - file relative path
+ *@param {string} [filename] - suggested file download name that the browser uses while
+ * saving the file. defaults to the files base name.
+ *@param {Function} callback - the callback function to execute once the operation
+ * completes or fails
+*/
+Response.prototype.download = function(filePath, filename, callback) {
+    this.fileServer.serveDownload(this, filePath, filename, callback);
+};
+
+export default Response;