Add autocomplete for issues and MRs in epics

References with namespace are inserted because this is at group scope
and iids are not unique

app/assets/javascripts/gfm_auto_complete.js

@@ -228,13 +228,13 @@ class GfmAutoComplete {
       displayTpl(value) {
         let tmpl = GfmAutoComplete.Loading.template;
         if (value.title != null) {
-          tmpl = GfmAutoComplete.Issues.templateFunction(value.id, value.title);
+          tmpl = GfmAutoComplete.Issues.templateFunction(value);
         }
         return tmpl;
       },
       data: GfmAutoComplete.defaultLoadingData,
-      // eslint-disable-next-line no-template-curly-in-string
-      insertTpl: '${atwho-at}${id}',
+      insertTpl: GfmAutoComplete.Issues.insertTemplateFunction,
+      skipSpecialCharacterTest: true,
       callbacks: {
         ...this.getDefaultCallbacks(),
         beforeSave(issues) {
@@ -245,6 +245,7 @@ class GfmAutoComplete {
             return {
               id: i.iid,
               title: sanitize(i.title),
+              reference: i.reference,
               search: `${i.iid} ${i.title}`,
             };
           });
@@ -294,13 +295,13 @@ class GfmAutoComplete {
       displayTpl(value) {
         let tmpl = GfmAutoComplete.Loading.template;
         if (value.title != null) {
-          tmpl = GfmAutoComplete.Issues.templateFunction(value.id, value.title);
+          tmpl = GfmAutoComplete.Issues.templateFunction(value);
         }
         return tmpl;
       },
       data: GfmAutoComplete.defaultLoadingData,
-      // eslint-disable-next-line no-template-curly-in-string
-      insertTpl: '${atwho-at}${id}',
+      insertTpl: GfmAutoComplete.Issues.insertTemplateFunction,
+      skipSpecialCharacterTest: true,
       callbacks: {
         ...this.getDefaultCallbacks(),
         beforeSave(merges) {
@@ -311,6 +312,7 @@ class GfmAutoComplete {
             return {
               id: m.iid,
               title: sanitize(m.title),
+              reference: m.reference,
               search: `${m.iid} ${m.title}`,
             };
           });
@@ -404,7 +406,7 @@ class GfmAutoComplete {
       displayTpl(value) {
         let tmpl = GfmAutoComplete.Loading.template;
         if (value.title != null) {
-          tmpl = GfmAutoComplete.Issues.templateFunction(value.id, value.title);
+          tmpl = GfmAutoComplete.Issues.templateFunction(value);
         }
         return tmpl;
       },
@@ -603,8 +605,12 @@ GfmAutoComplete.Labels = {
 };
 // Issues, MergeRequests and Snippets
 GfmAutoComplete.Issues = {
-  templateFunction(id, title) {
-    return `<li><small>${id}</small> ${_.escape(title)}</li>`;
+  insertTemplateFunction(value) {
+    // eslint-disable-next-line no-template-curly-in-string
+    return value.reference || '${atwho-at}${id}';
+  },
+  templateFunction({ id, title, reference }) {
+    return `<li><small>${reference || id}</small> ${_.escape(title)}</li>`;
   },
 };
 // Milestones

ee/app/assets/javascripts/gfm_auto_complete_ee.js

@@ -9,7 +9,7 @@ const setupAutoCompleteEpics = ($input, defaultCallbacks) => {
     displayTpl(value) {
       let tmpl = GfmAutoComplete.Loading.template;
       if (value.title != null) {
-        tmpl = GfmAutoComplete.Issues.templateFunction(value.id, value.title);
+        tmpl = GfmAutoComplete.Issues.templateFunction(value);
       }
       return tmpl;
     },

ee/app/controllers/groups/autocomplete_sources_controller.rb

@@ -7,6 +7,14 @@ class Groups::AutocompleteSourcesController < Groups::ApplicationController
     render json: ::Groups::ParticipantsService.new(@group, current_user).execute(target)
   end
 
+  def issues
+    render json: issuable_serializer.represent(@autocomplete_service.issues, parent_group: @group)
+  end
+
+  def merge_requests
+    render json: issuable_serializer.represent(@autocomplete_service.merge_requests, parent_group: @group)
+  end
+
   def labels
     render json: @autocomplete_service.labels_as_hash(target)
   end
@@ -29,6 +37,10 @@ class Groups::AutocompleteSourcesController < Groups::ApplicationController
     @autocomplete_service = ::Groups::AutocompleteService.new(@group, current_user)
   end
 
+  def issuable_serializer
+    GroupIssuableAutocompleteSerializer.new
+  end
+
   # rubocop: disable CodeReuse/ActiveRecord
   def target
     case params[:type]&.downcase

ee/app/helpers/ee/application_helper.rb

@@ -75,6 +75,8 @@ module EE
         {
           members: members_group_autocomplete_sources_path(object, type: noteable_type, type_id: params[:id]),
           labels: labels_group_autocomplete_sources_path(object, type: noteable_type, type_id: params[:id]),
+          issues: issues_group_autocomplete_sources_path(object),
+          mergeRequests: merge_requests_group_autocomplete_sources_path(object),
           epics: epics_group_autocomplete_sources_path(object),
           commands: commands_group_autocomplete_sources_path(object, type: noteable_type, type_id: params[:id]),
           milestones: milestones_group_autocomplete_sources_path(object)

ee/app/serializers/group_issuable_autocomplete_entity.rb

+# frozen_string_literal: true
+
+class GroupIssuableAutocompleteEntity < Grape::Entity
+  expose :iid
+  expose :title
+  expose :reference do |issuable, options|
+    issuable.to_reference(options[:parent_group])
+  end
+end

ee/app/serializers/group_issuable_autocomplete_serializer.rb

+# frozen_string_literal: true
+
+class GroupIssuableAutocompleteSerializer < BaseSerializer
+  entity GroupIssuableAutocompleteEntity
+end

ee/app/services/groups/autocomplete_service.rb

@@ -3,12 +3,31 @@
 module Groups
   class AutocompleteService < Groups::BaseService
     include LabelsAsHash
+
+    # rubocop: disable CodeReuse/ActiveRecord
+    def issues
+      IssuesFinder.new(current_user, group_id: group.id, include_subgroups: true, state: 'opened')
+        .execute
+        .preload(project: :namespace)
+        .select(:iid, :title, :project_id)
+    end
+    # rubocop: enable CodeReuse/ActiveRecord
+
+    # rubocop: disable CodeReuse/ActiveRecord
+    def merge_requests
+      MergeRequestsFinder.new(current_user, group_id: group.id, include_subgroups: true, state: 'opened')
+        .execute
+        .preload(target_project: :namespace)
+        .select(:iid, :title, :target_project_id)
+    end
+    # rubocop: enable CodeReuse/ActiveRecord
+
     def epics
       # TODO: change to EpicsFinder once frontend supports epics from external groups.
       # See https://gitlab.com/gitlab-org/gitlab-ee/issues/6837
       DeclarativePolicy.user_scope do
         if Ability.allowed?(current_user, :read_epic, group)
-          group.epics
+          group.epics.select(:iid, :title)
         else
           []
         end
@@ -19,7 +38,7 @@ module Groups
       group_ids =
         ParentGroupsFinder.new(current_user, group).execute.map(&:id)
 
-      MilestonesFinder.new(group_ids: group_ids).execute
+      MilestonesFinder.new(group_ids: group_ids).execute.select(:iid, :title)
     end
 
     def labels_as_hash(target)

ee/config/routes/group.rb

@@ -41,6 +41,8 @@ constraints(::Constraints::GroupUrlConstrainer.new) do
     resources :autocomplete_sources, only: [] do
       collection do
         get 'members'
+        get 'issues'
+        get 'merge_requests'
         get 'labels'
         get 'epics'
         get 'commands'

ee/spec/controllers/groups/autocomplete_sources_controller_spec.rb

@@ -25,7 +25,7 @@ describe Groups::AutocompleteSourcesController do
 
       expect(json_response).to be_an(Array)
       expect(json_response.first).to include(
-        'id' => epic.id, 'iid' => epic.iid, 'title' => epic.title
+        'iid' => epic.iid, 'title' => epic.title
       )
     end
   end
@@ -43,9 +43,8 @@ describe Groups::AutocompleteSourcesController do
 
       expect(response).to have_gitlab_http_status(200)
       expect(json_response.count).to eq(1)
-      expect(response).to match_response_schema('public_api/v4/milestones')
       expect(json_response.first).to include(
-        'id' => group_milestone.id, 'iid' => group_milestone.iid, 'title' => group_milestone.title
+        'iid' => group_milestone.iid, 'title' => group_milestone.title
       )
     end
   end

ee/spec/features/epics/gfm_autocomplete_spec.rb

@@ -15,6 +15,32 @@ describe 'GFM autocomplete', :js do
     wait_for_requests
   end
 
+  context 'issuables' do
+    let(:project) { create(:project, :repository, namespace: group) }
+
+    context 'issues' do
+      it 'shows issues of group' do
+        issue_1 = create(:issue, project: project)
+        issue_2 = create(:issue, project: project)
+
+        type(find('#note-body'), '#')
+
+        expect_resources(shown: [issue_1, issue_2])
+      end
+    end
+
+    context 'merge requests' do
+      it 'shows merge requests of group' do
+        mr_1 = create(:merge_request, source_project: project)
+        mr_2 = create(:merge_request, source_project: project, source_branch: 'other-branch')
+
+        type(find('#note-body'), '!')
+
+        expect_resources(shown: [mr_1, mr_2])
+      end
+    end
+  end
+
   context 'epics' do
     let!(:epic2) { create(:epic, group: group, title: 'make tea') }
 

ee/spec/helpers/application_helper_spec.rb

@@ -62,7 +62,7 @@ describe ApplicationHelper do
       let(:noteable_type) { Epic }
 
       it 'returns paths for autocomplete_sources_controller' do
-        expect_autocomplete_data_sources(object, noteable_type, [:members, :labels, :epics, :commands, :milestones])
+        expect_autocomplete_data_sources(object, noteable_type, [:members, :issues, :mergeRequests, :labels, :epics, :commands, :milestones])
       end
     end
 

ee/spec/serializers/group_issuable_autocomplete_entity_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe GroupIssuableAutocompleteEntity do
+  let(:group) { build_stubbed(:group) }
+  let(:project) { build_stubbed(:project, group: group) }
+  let(:issue) { build_stubbed(:issue, project: project) }
+
+  subject { described_class.new(issue, parent_group: group).as_json }
+
+  describe '#represent' do
+    it 'includes the iid, title, and reference' do
+      expect(subject).to include(:iid, :title, :reference)
+    end
+  end
+end

ee/spec/services/groups/autocomplete_service_spec.rb

@@ -54,6 +54,32 @@ describe Groups::AutocompleteService do
     end
   end
 
+  describe '#issues', :nested_groups do
+    let(:project) { create(:project, group: group) }
+    let(:sub_group_project) { create(:project, group: sub_group) }
+
+    let!(:project_issue) { create(:issue, project: project) }
+    let!(:sub_group_project_issue) { create(:issue, project: sub_group_project) }
+
+    it 'returns issues in group and subgroups' do
+      expect(subject.issues.map(&:iid)).to contain_exactly(project_issue.iid, sub_group_project_issue.iid)
+      expect(subject.issues.map(&:title)).to contain_exactly(project_issue.title, sub_group_project_issue.title)
+    end
+  end
+
+  describe '#merge_requests', :nested_groups do
+    let(:project) { create(:project, :repository, group: group) }
+    let(:sub_group_project) { create(:project, :repository, group: sub_group) }
+
+    let!(:project_mr) { create(:merge_request, source_project: project) }
+    let!(:sub_group_project_mr) { create(:merge_request, source_project: sub_group_project) }
+
+    it 'returns merge requests in group and subgroups' do
+      expect(subject.merge_requests.map(&:iid)).to contain_exactly(project_mr.iid, sub_group_project_mr.iid)
+      expect(subject.merge_requests.map(&:title)).to contain_exactly(project_mr.title, sub_group_project_mr.title)
+    end
+  end
+
   describe '#epics' do
     it 'returns nothing if not allowed' do
       allow(Ability).to receive(:allowed?).with(user, :read_epic, group).and_return(false)
@@ -64,7 +90,7 @@ describe Groups::AutocompleteService do
     it 'returns epics from group' do
       allow(Ability).to receive(:allowed?).with(user, :read_epic, group).and_return(true)
 
-      expect(subject.epics).to contain_exactly(epic)
+      expect(subject.epics.map(&:iid)).to contain_exactly(epic.iid)
     end
   end
 
@@ -92,28 +118,35 @@ describe Groups::AutocompleteService do
     end
 
     context 'when group is public' do
-      it 'returns milestones from groups', :nested_groups do
-        group = create(:group, :public)
-        subgroup = create(:group, :public, parent: group)
-        group_milestone = create(:milestone, group: group)
-        subgroup_milestone = create(:milestone, group: subgroup)
-        subgroup.add_guest(user)
-        group.add_guest(user)
+      let(:public_group) { create(:group, :public) }
+      let(:public_subgroup) { create(:group, :public, parent: public_group) }
+
+      before do
+        public_subgroup.add_guest(user)
+        public_group.add_guest(user)
 
-        subject = described_class.new(subgroup, user)
+        group_milestone.update(group: public_group)
+        subgroup_milestone.update(group: public_subgroup)
+      end
+
+      it 'returns milestones from groups and subgroups', :nested_groups do
+        subject = described_class.new(public_subgroup, user)
 
-        expect(subject.milestones).to match_array([group_milestone, subgroup_milestone])
+        expect(subject.milestones.map(&:iid)).to contain_exactly(group_milestone.iid, subgroup_milestone.iid)
+        expect(subject.milestones.map(&:title)).to contain_exactly(group_milestone.title, subgroup_milestone.title)
       end
     end
 
     it 'returns milestones from group' do
-      expect(subject.milestones).to include(group_milestone)
+      expect(subject.milestones.map(&:iid)).to contain_exactly(group_milestone.iid)
+      expect(subject.milestones.map(&:title)).to contain_exactly(group_milestone.title)
     end
 
     it 'returns milestones from groups and subgroups', :nested_groups do
       milestones = described_class.new(sub_group, user).milestones
 
-      expect(milestones).to include(group_milestone, subgroup_milestone)
+      expect(milestones.map(&:iid)).to contain_exactly(group_milestone.iid, subgroup_milestone.iid)
+      expect(milestones.map(&:title)).to contain_exactly(group_milestone.title, subgroup_milestone.title)
     end
 
     it 'returns only milestones that user can read', :nested_groups do
@@ -122,7 +155,8 @@ describe Groups::AutocompleteService do
 
       milestones = described_class.new(sub_group, user).milestones
 
-      expect(milestones).to match_array([subgroup_milestone])
+      expect(milestones.map(&:iid)).to contain_exactly(subgroup_milestone.iid)
+      expect(milestones.map(&:title)).to contain_exactly(subgroup_milestone.title)
     end
   end
 end

spec/javascripts/gfm_auto_complete_spec.js

@@ -205,4 +205,40 @@ describe('GfmAutoComplete', function() {
       expect(GfmAutoComplete.isLoading({ title: 'Foo' })).toBe(false);
     });
   });
+
+  describe('Issues.insertTemplateFunction', function() {
+    it('should return default template', function() {
+      expect(GfmAutoComplete.Issues.insertTemplateFunction({ id: 5, title: 'Some Issue' })).toBe(
+        '${atwho-at}${id}', // eslint-disable-line no-template-curly-in-string
+      );
+    });
+
+    it('should return reference when reference is set', function() {
+      expect(
+        GfmAutoComplete.Issues.insertTemplateFunction({
+          id: 5,
+          title: 'Some Issue',
+          reference: 'grp/proj#5',
+        }),
+      ).toBe('grp/proj#5');
+    });
+  });
+
+  describe('Issues.templateFunction', function() {
+    it('should return html with id and title', function() {
+      expect(GfmAutoComplete.Issues.templateFunction({ id: 5, title: 'Some Issue' })).toBe(
+        '<li><small>5</small> Some Issue</li>',
+      );
+    });
+
+    it('should replace id with reference if reference is set', function() {
+      expect(
+        GfmAutoComplete.Issues.templateFunction({
+          id: 5,
+          title: 'Some Issue',
+          reference: 'grp/proj#5',
+        }),
+      ).toBe('<li><small>grp/proj#5</small> Some Issue</li>');
+    });
+  });
 });