Expose new members count in Group Activity API

doc/api/api_resources.md

@@ -120,7 +120,7 @@ The following API resources are available outside of project and group contexts
 | [Events](events.md)                                | `/events`, `/users/:id/events` (also available for projects)            |
 | [Feature flags](features.md)                       | `/features`                                                             |
 | [Geo Nodes](geo_nodes.md) **(PREMIUM ONLY)**       | `/geo_nodes`                                                            |
-| [Group Activity Analytics](group_activity_analytics.md) **(STARTER)**  | `/analytics/group_activity/{issues_count | merge_requests_count}`  |
+| [Group Activity Analytics](group_activity_analytics.md) **(STARTER)**  | `/analytics/group_activity/{issues_count | merge_requests_count | new_members_count }`  |
 | [Import repository from GitHub](import.md)         | `/import/github`                                                        |
 | [Issues](issues.md)                                | `/issues` (also available for groups and projects)                      |
 | [Issues Statistics](issues_statistics.md)          | `/issues_statistics` (also available for groups and projects)           |

doc/api/group_activity_analytics.md

@@ -49,3 +49,27 @@ Example response:
 ```json
 { "merge_requests_count": 10 }
 ```
+
+## Get count of members recently added to group
+
+```plaintext
+GET /analytics/group_activity/new_members_count
+```
+
+Parameters:
+
+| Attribute | Type | Required | Description |
+| --------- | ---- | -------- | ----------- |
+| `group_path` | string | yes | Group path |
+
+Example request:
+
+```shell
+curl --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/analytics/group_activity/new_members_count?group_path=gitlab-org
+```
+
+Example response:
+
+```json
+{ "new_members_count": 10 }
+```

ee/changelogs/unreleased/ag-add-recent-members-entity.yml

+---
+title: Add API endpoint for new members' count in Group Activity Analytics
+merge_request: 26601
+author:
+type: added

ee/lib/api/analytics/group_activity_analytics.rb

@@ -9,7 +9,6 @@ module API
 
       before do
         authenticate!
-        not_found! unless Feature.enabled?(:group_activity_analytics)
       end
 
       helpers do
@@ -35,7 +34,11 @@ module API
           end
 
           get 'issues_count' do
+            not_found! unless
+              Feature.enabled?(:group_activity_analytics, group)
+
             authorize! :read_group_activity_analytics, group
+
             present(
               calculator,
               with: EE::API::Entities::Analytics::GroupActivity::IssuesCount
@@ -52,12 +55,37 @@ module API
           end
 
           get 'merge_requests_count' do
+            not_found! unless
+              Feature.enabled?(:group_activity_analytics, group)
+
             authorize! :read_group_activity_analytics, group
+
             present(
               calculator,
               with: EE::API::Entities::Analytics::GroupActivity::MergeRequestsCount
             )
           end
+
+          desc 'Get count of recently created group members' do
+            detail DESCRIPTION_DETAIL
+            success EE::API::Entities::Analytics::GroupActivity::NewMembersCount
+          end
+
+          params do
+            requires :group_path, type: String, desc: 'Group Path'
+          end
+
+          get 'new_members_count' do
+            not_found! unless
+              Feature.enabled?(:group_activity_analytics, group)
+
+            authorize! :read_group_activity_analytics, group
+
+            present(
+              calculator,
+              with: EE::API::Entities::Analytics::GroupActivity::NewMembersCount
+            )
+          end
         end
       end
     end

ee/lib/ee/api/entities/analytics/group_activity/new_members_count.rb

+# frozen_string_literal: true
+
+module EE
+  module API
+    module Entities
+      module Analytics
+        module GroupActivity
+          class NewMembersCount < Grape::Entity
+            expose :new_members_count
+          end
+        end
+      end
+    end
+  end
+end

ee/spec/lib/ee/api/entities/analytics/group_activity_spec.rb

@@ -16,10 +16,20 @@ describe EE::API::Entities::Analytics::GroupActivity do
   end
 
   context 'issues count' do
-    it_behaves_like 'exposes count', 'issues_count', EE::API::Entities::Analytics::GroupActivity::IssuesCount
+    it_behaves_like 'exposes count',
+      'issues_count',
+      EE::API::Entities::Analytics::GroupActivity::IssuesCount
   end
 
   context 'merge requests count' do
-    it_behaves_like 'exposes count', 'merge_requests_count', EE::API::Entities::Analytics::GroupActivity::MergeRequestsCount
+    it_behaves_like 'exposes count',
+      'merge_requests_count',
+      EE::API::Entities::Analytics::GroupActivity::MergeRequestsCount
+  end
+
+  context 'new members count' do
+    it_behaves_like 'exposes count',
+      'new_members_count',
+      EE::API::Entities::Analytics::GroupActivity::NewMembersCount
   end
 end

ee/spec/requests/api/analytics/group_activity_analytics_spec.rb

@@ -11,7 +11,7 @@ describe API::Analytics::GroupActivityAnalytics do
 
   let_it_be(:anonymous_user) { create(:user) }
 
-  shared_examples 'GET group_activity' do |activity|
+  shared_examples 'GET group_activity' do |activity, count|
     let(:feature_enabled) { true }
     let(:params) { { group_path: group.full_path } }
     let(:current_user) { reporter }
@@ -29,7 +29,7 @@ describe API::Analytics::GroupActivityAnalytics do
     end
 
     it 'is returns a count' do
-      expect(response.parsed_body).to eq({ "#{activity}_count" => 0 })
+      expect(response.parsed_body).to eq({ "#{activity}_count" => count })
     end
 
     context 'when feature is not available in plan' do
@@ -58,10 +58,14 @@ describe API::Analytics::GroupActivityAnalytics do
   end
 
   context 'GET /group_activity/issues_count' do
-    it_behaves_like 'GET group_activity', 'issues'
+    it_behaves_like 'GET group_activity', 'issues', 0
   end
 
   context 'GET /group_activity/merge_requests_count' do
-    it_behaves_like 'GET group_activity', 'merge_requests'
+    it_behaves_like 'GET group_activity', 'merge_requests', 0
+  end
+
+  context 'GET /group_activity/new_members_count' do
+    it_behaves_like 'GET group_activity', 'new_members', 1 # reporter
   end
 end