Update graphql for emails_disabled transition

Following comments in front-end MR:
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/135959

Split the GraphQL updates into a new merge request.

app/graphql/types/group_type.rb

@@ -62,6 +62,11 @@ class GroupType < NamespaceType
           null: true,
           description: 'Indicates if a group has email notifications disabled.'
 
+    field :emails_enabled,
+          type: GraphQL::Types::Boolean,
+          null: true,
+          description: 'Indicates if a group has email notifications enabled.'
+
     field :max_access_level, Types::AccessLevelType,
           null: false,
           description: 'The maximum access level of the current user in the group.'
@@ -365,6 +370,10 @@ def descendant_groups_count
       end
     end
 
+    def emails_disabled
+      !group.emails_enabled?
+    end
+
     def projects_count
       BatchLoader::GraphQL.for(object.id).batch do |group_ids, loader|
         projects_counts = Group.id_in(group_ids).projects_counts

doc/api/graphql/reference/index.md

@@ -19483,6 +19483,7 @@ GPG signature for a signed commit.
 | <a id="groupdescriptionhtml"></a>`descriptionHtml` | [`String`](#string) | GitLab Flavored Markdown rendering of `description`. |
 | <a id="groupdora"></a>`dora` | [`Dora`](#dora) | Group's DORA metrics. |
 | <a id="groupemailsdisabled"></a>`emailsDisabled` | [`Boolean`](#boolean) | Indicates if a group has email notifications disabled. |
+| <a id="groupemailsenabled"></a>`emailsEnabled` | [`Boolean`](#boolean) | Indicates if a group has email notifications enabled. |
 | <a id="groupenforcefreeusercap"></a>`enforceFreeUserCap` | [`Boolean`](#boolean) | Indicates whether the group has limited users for a free plan. |
 | <a id="groupepicboards"></a>`epicBoards` | [`EpicBoardConnection`](#epicboardconnection) | Find epic boards. (see [Connections](#connections)) |
 | <a id="groupepicsenabled"></a>`epicsEnabled` | [`Boolean`](#boolean) | Indicates if Epics are enabled for namespace. |

spec/graphql/types/group_type_spec.rb

@@ -159,4 +159,82 @@ def clean_state_query
       end
     end
   end
+
+  describe 'emailsDisabled' do
+    let_it_be(:group) { create(:group) }
+
+    let(:query) do
+      %(
+        query {
+          group(fullPath: "#{group.full_path}") {
+            emailsDisabled
+          }
+        }
+      )
+    end
+
+    subject(:result) do
+      result = GitlabSchema.execute(query).as_json
+      result.dig('data', 'group', 'emailsDisabled')
+    end
+
+    it 'is not a deprecated field' do
+      expect(described_class.fields['emailsDisabled'].deprecation).to be_nil
+    end
+
+    describe 'when emails_enabled is true' do
+      before do
+        group.update!(emails_enabled: true)
+      end
+
+      it { is_expected.to eq(false) }
+    end
+
+    describe 'when emails_enabled is false' do
+      before do
+        group.update!(emails_enabled: false)
+      end
+
+      it { is_expected.to eq(true) }
+    end
+  end
+
+  describe 'emailsEnabled' do
+    let_it_be(:group) { create(:group) }
+
+    let(:query) do
+      %(
+        query {
+          group(fullPath: "#{group.full_path}") {
+            emailsEnabled
+          }
+        }
+      )
+    end
+
+    subject(:result) do
+      result = GitlabSchema.execute(query).as_json
+      result.dig('data', 'group', 'emailsEnabled')
+    end
+
+    it 'is not a deprecated field' do
+      expect(described_class.fields['emailsEnabled'].deprecation).to be_nil
+    end
+
+    describe 'when emails_enabled is true' do
+      before do
+        group.update!(emails_enabled: true)
+      end
+
+      it { is_expected.to eq(true) }
+    end
+
+    describe 'when emails_enabled is false' do
+      before do
+        group.update!(emails_enabled: false)
+      end
+
+      it { is_expected.to eq(false) }
+    end
+  end
 end