Add assigned issue and pending todo counts to /users_count API

Changelog: added

doc/api/users.md

@@ -859,9 +859,13 @@ Example response:
 
 Get the counts (same as in top right menu) of the currently signed in user.
 
-| Attribute        | Type   | Description                                                  |
-| ---------------- | ------ | ------------------------------------------------------------ |
-| `merge_requests` | number | Merge requests that are active and assigned to current user. |
+| Attribute                         | Type   | Description                                                                  |
+| --------------------------------- | ------ | ---------------------------------------------------------------------------- |
+| `assigned_issues`                 | number | Number of issues that are open and assigned to the current user. [Added](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/66909) in GitLab 14.2. |
+| `assigned_merge_requests`         | number | Number of merge requests that are active and assigned to the current user. [Added](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/50026) in GitLab 13.8. |
+| `merge_requests`                  | number | [Deprecated](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/50026) in GitLab 13.8. Equivalent to and replaced by `assigned_merge_requests`. |
+| `review_requested_merge_requests` | number | Number of merge requests that the current user has been requested to review. [Added](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/50026) in GitLab 13.8. |
+| `todos`                           | number | Number of pending to-do items for current user. [Added](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/66909) in GitLab 14.2. |
 
 ```plaintext
 GET /user_counts
@@ -875,7 +879,11 @@ Example response:
 
 ```json
 {
-  "merge_requests": 4
+  "merge_requests": 4,
+  "assigned_issues": 15,
+  "assigned_merge_requests": 11,
+  "review_requested_merge_requests": 0,
+  "todos": 1
 }
 ```
 

lib/api/user_counts.rb

@@ -6,15 +6,17 @@ module API
 
     resource :user_counts do
       desc 'Return the user specific counts' do
-        detail 'Open MR Count'
+        detail 'Assigned open issues, assigned MRs and pending todos count'
       end
       get do
         unauthorized! unless current_user
 
         {
           merge_requests: current_user.assigned_open_merge_requests_count, # @deprecated
+          assigned_issues: current_user.assigned_open_issues_count,
           assigned_merge_requests: current_user.assigned_open_merge_requests_count,
-          review_requested_merge_requests: current_user.review_requested_open_merge_requests_count
+          review_requested_merge_requests: current_user.review_requested_open_merge_requests_count,
+          todos: current_user.todos_pending_count
         }
       end
     end

spec/requests/api/user_counts_spec.rb

@@ -3,8 +3,10 @@
 require 'spec_helper'
 
 RSpec.describe API::UserCounts do
-  let(:user) { create(:user) }
-  let(:project) { create(:project, :public) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:project) { create(:project, :public) }
+  let_it_be(:issue) { create(:issue, project: project, author: user, assignees: [user]) }
+  let_it_be(:todo) { create(:todo, :pending, user: user, project: project) }
 
   let!(:merge_request) { create(:merge_request, :simple, author: user, assignees: [user], source_project: project, title: "Test") }
 
@@ -18,22 +20,36 @@ RSpec.describe API::UserCounts do
     end
 
     context 'when authenticated' do
-      it 'returns open counts for current user' do
+      it 'returns assigned issue counts for current_user' do
         get api('/user_counts', user)
 
-        expect(response).to have_gitlab_http_status(:ok)
-        expect(json_response).to be_a Hash
-        expect(json_response['merge_requests']).to eq(1)
+        expect(json_response['assigned_issues']).to eq(1)
       end
 
-      it 'updates the mr count when a new mr is assigned' do
-        create(:merge_request, source_project: project, author: user, assignees: [user])
+      context 'merge requests' do
+        it 'returns assigned MR counts for current user' do
+          get api('/user_counts', user)
 
+          expect(response).to have_gitlab_http_status(:ok)
+          expect(json_response).to be_a Hash
+          expect(json_response['merge_requests']).to eq(1)
+        end
+
+        it 'updates the mr count when a new mr is assigned' do
+          create(:merge_request, source_project: project, author: user, assignees: [user])
+
+          get api('/user_counts', user)
+
+          expect(response).to have_gitlab_http_status(:ok)
+          expect(json_response).to be_a Hash
+          expect(json_response['merge_requests']).to eq(2)
+        end
+      end
+
+      it 'returns pending todo counts for current_user' do
         get api('/user_counts', user)
 
-        expect(response).to have_gitlab_http_status(:ok)
-        expect(json_response).to be_a Hash
-        expect(json_response['merge_requests']).to eq(2)
+        expect(json_response['todos']).to eq(1)
       end
     end
   end