Implement self.get and self.post from Gerrit JS API https://gerrit-review.googlesource.com/Documentation/js-api.html#self_get https://gerrit-review.googlesource.com/Documentation/js-api.html#self_post Feature: Issue 5960 Change-Id: I6778f40ba1d6d8b2b31ebb51ffd39a6fab265424

diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface.html b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface.html
index 5c0535b..3cda49b 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface.html
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface.html

@@ -15,10 +15,10 @@
 -->
 <link rel="import" href="../../../bower_components/polymer/polymer.html">
 <link rel="import" href="../../core/gr-reporting/gr-reporting.html">
+<link rel="import" href="../../shared/gr-rest-api-interface/gr-rest-api-interface.html">
 <link rel="import" href="../gr-rest-api-interface/gr-rest-api-interface.html">
 
 <dom-module id="gr-js-api-interface">
-  <template></template>
   <script src="gr-change-actions-js-api.js"></script>
   <script src="gr-change-reply-js-api.js"></script>
   <script src="gr-js-api-interface.js"></script>

diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
index c3013bd..40810b1 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html

@@ -36,6 +36,8 @@
     let plugin;
     let errorStub;
     let sandbox;
+    let getResponseObjectStub;
+    let sendStub;
 
     const throwErrFn = function() {
       throw Error('Unfortunately, this handler has stopped');
@@ -43,10 +45,16 @@
 
     setup(() => {
       sandbox = sinon.sandbox.create();
+      getResponseObjectStub = sandbox.stub().returns(Promise.resolve());
+      sendStub = sandbox.stub().returns(Promise.resolve());
       stub('gr-rest-api-interface', {
         getAccount() {
           return Promise.resolve({name: 'Judy Hopps'});
         },
+        getResponseObject: getResponseObjectStub,
+        send(...args) {
+          return sendStub(...args);
+        },
       });
       element = fixture('basic');
       errorStub = sandbox.stub(console, 'error');
@@ -67,6 +75,27 @@
           'http://test.com/plugins/testplugin/static/test.js');
     });
 
+    test('get', done => {
+      const response = {foo: 'foo'};
+      getResponseObjectStub.returns(Promise.resolve(response));
+      plugin.get('/url', r => {
+        assert.isTrue(sendStub.calledWith('GET', '/url'));
+        assert.strictEqual(r, response);
+        done();
+      });
+    });
+
+    test('post', done => {
+      const payload = {foo: 'foo'};
+      const response = {bar: 'bar'};
+      getResponseObjectStub.returns(Promise.resolve(response));
+      plugin.post('/url', payload, r => {
+        assert.isTrue(sendStub.calledWith('POST', '/url', payload));
+        assert.strictEqual(r, response);
+        done();
+      });
+    });
+
     test('history event', done => {
       plugin.on(element.EventType.HISTORY, throwErrFn);
       plugin.on(element.EventType.HISTORY, path => {

diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js
index a84eedd..0811935 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js

@@ -24,6 +24,14 @@
     GWT_PLUGIN_STUB[name] = warnNotSupported.bind(null, name);
   }
 
+  let _restAPI;
+  const getRestAPI = () => {
+    if (!_restAPI) {
+      _restAPI = document.createElement('gr-rest-api-interface');
+    }
+    return _restAPI;
+  };
+
   const API_VERSION = '0.1';
 
   // GWT JSNI uses $wnd to refer to window.
@@ -77,6 +85,20 @@
     return this._url.origin + '/plugins/' + this._name + (opt_path || '/');
   };
 
+  Plugin.prototype._send = function(method, url, callback, opt_payload) {
+    return getRestAPI().send(method, url, opt_payload)
+        .then(getRestAPI().getResponseObject)
+        .then(callback);
+  };
+
+  Plugin.prototype.get = function(url, callback) {
+    return this._send('GET', url, callback);
+  },
+
+  Plugin.prototype.post = function(url, payload, callback) {
+    return this._send('POST', url, callback, payload);
+  },
+
   Plugin.prototype.changeActions = function() {
     return new GrChangeActionsInterface(Plugin._sharedAPIElement.getElement(
         Plugin._sharedAPIElement.Element.CHANGE_ACTIONS));