feat(request): add support for adding macros

request exposes a macro static method to attach methods to the request prototype

Author: thetutlage

src/Request/index.js

@@ -615,14 +615,25 @@ class Request {
    * tells whether or not request has body. It can be
    * used by bodyParsers to decide whether or not to parse body
    *
-   * @return {Boolean} [description]
+   * @return {Boolean}
    *
    * @public
    */
   hasBody () {
     return nodeReq.hasBody(this.request)
   }
 
+  /**
+   * adds a new method to the request prototype
+   *
+   * @param  {String}   name
+   * @param  {Function} callback
+   *
+   * @public
+   */
+  static macro (name, callback) {
+    this.prototype[name] = callback
+  }
 }
 
 module.exports = Request

test/unit/request.spec.js

@@ -1070,4 +1070,20 @@ describe('Request', function () {
     expect(flashMessage[1]).to.equal(querystring.escape('j:'+JSON.stringify(body)))
   })
 
+  it('should be able to add macro to the request prototype', function () {
+    Request.macro('foo', function () {
+      return 'foo'
+    })
+    const request = new Request({}, {}, {get: function () {}})
+    expect(request.foo()).to.equal('foo')
+  })
+
+  it('should have access to instance inside the callback', function * () {
+    Request.macro('foo', function () {
+      return this.request.name
+    })
+    const request = new Request({name: 'bar'}, {}, {get: function () {}})
+    expect(request.foo()).to.equal('bar')
+  })
+
 })