Add frontend API method for current user (!11608)winh-current-user-frontend-api

2 files changed, 48 insertions, 0 deletions

diff --git a/app/assets/javascripts/api.js b/app/assets/javascripts/api.js
index 6680834a8d1..45c5dd718a6 100644
--- a/app/assets/javascripts/api.js
+++ b/app/assets/javascripts/api.js
@@ -13,6 +13,7 @@ const Api = {
   dockerfilePath: '/api/:version/templates/dockerfiles/:key',
   issuableTemplatePath: '/:namespace_path/:project_path/templates/:type/:key',
   usersPath: '/api/:version/users.json',
+  currentUserPath: '/api/:version/user.json',
 
   group(groupId, callback) {
     const url = Api.buildUrl(Api.groupPath)
@@ -149,6 +150,14 @@ const Api = {
     });
   },
 
+  currentUser() {
+    const url = Api.buildUrl(this.currentUserPath);
+    return Api.wrapAjaxCall({
+      url,
+      dataType: 'json',
+    });
+  },
+
   buildUrl(url) {
     let urlRoot = '';
     if (gon.relative_url_root != null) {
diff --git a/spec/javascripts/api_spec.js b/spec/javascripts/api_spec.js
index 867322ce8ae..38dd1f5aa04 100644
--- a/spec/javascripts/api_spec.js
+++ b/spec/javascripts/api_spec.js
@@ -278,4 +278,43 @@ describe('Api', () => {
         .catch(done.fail);
     });
   });
+
+  describe('currentUser', () => {
+    it('fetches current user', (done) => {
+      const expectedUrl = `${dummyUrlRoot}/api/${dummyApiVersion}/user.json`;
+      spyOn(jQuery, 'ajax').and.callFake((request) => {
+        expect(request.url).toEqual(expectedUrl);
+        expect(request.dataType).toEqual('json');
+        return sendDummyResponse();
+      });
+
+      Api.currentUser()
+        .then((response) => {
+          expect(response).toBe(dummyResponse);
+        })
+        .then(done)
+        .catch(done.fail);
+    });
+
+    it('throws if fetching current user fails', (done) => {
+      const expectedUrl = `${dummyUrlRoot}/api/${dummyApiVersion}/user.json`;
+      const expectedError = 'current user hides behind a bush';
+      spyOn(jQuery, 'ajax').and.callFake((request) => {
+        expect(request.url).toEqual(expectedUrl);
+        expect(request.dataType).toEqual('json');
+
+        const deferred = $.Deferred();
+        deferred.reject(null, null, expectedError);
+        return deferred.promise();
+      });
+
+      Api.currentUser()
+        .then(done.fail)
+        .catch((error) => {
+          expect(error.message).toBe(`${expectedUrl}: ${expectedError}`);
+        })
+        .then(done)
+        .catch(done.fail);
+    });
+  });
 });