Add more attributes to issues GraphQL endpoint

In order to support realtime sidebars and continue to complete
the GraphQL API, added additional attributes to be returned
for IssueType.

https://gitlab.com/gitlab-org/gitlab/issues/20718

app/graphql/types/extended_issue_type.rb

+# frozen_string_literal: true
+
+module Types
+  class ExtendedIssueType < IssueType
+    graphql_name 'ExtendedIssue'
+
+    authorize :read_issue
+    expose_permissions Types::PermissionTypes::Issue
+    present_using IssuePresenter
+
+    field :subscribed, GraphQL::BOOLEAN_TYPE, method: :subscribed?, null: false, complexity: 5,
+          description: 'Boolean flag for whether the currently logged in user is subscribed to this issue'
+  end
+end

app/graphql/types/issue_type.rb

@@ -49,6 +49,11 @@ module Types
     field :web_url, GraphQL::STRING_TYPE, null: false # rubocop:disable Graphql/Descriptions
     field :relative_position, GraphQL::INT_TYPE, null: true # rubocop:disable Graphql/Descriptions
 
+    field :epic, ::Types::EpicType, null: true, description: 'The epic to which issue belongs'
+    field :participants, Types::UserType.connection_type, null: true, complexity: 5, description: 'List of participants for the issue'
+    field :time_estimate, GraphQL::INT_TYPE, null: false, description: 'The time estimate on the issue'
+    field :total_time_spent, GraphQL::INT_TYPE, null: false, description: 'Total time reported as spent on the issue'
+
     field :closed_at, Types::TimeType, null: true # rubocop:disable Graphql/Descriptions
 
     field :created_at, Types::TimeType, null: false # rubocop:disable Graphql/Descriptions

app/graphql/types/project_type.rb

@@ -92,7 +92,7 @@ module Types
           resolver: Resolvers::IssuesResolver
 
     field :issue, # rubocop:disable Graphql/Descriptions
-          Types::IssueType,
+          Types::ExtendedIssueType,
           null: true,
           resolver: Resolvers::IssuesResolver.single
 

app/presenters/issue_presenter.rb

@@ -11,6 +11,10 @@ class IssuePresenter < Gitlab::View::Presenter::Delegated
     url_builder.issue_path(issue)
   end
 
+  def subscribed?
+    issue.subscribed?(current_user, issue.project)
+  end
+
   private
 
   def url_builder

changelogs/unreleased/20718-extend-issue-attributes-returned-by-graphql.yml

+---
+title: Add more attributes to issues GraphQL endpoint
+merge_request: 17802
+author:
+type: changed

spec/graphql/types/extended_issue_type_spec.rb

+require 'spec_helper'
+
+describe GitlabSchema.types['ExtendedIssue'] do
+  it { expect(described_class).to expose_permissions_using(Types::PermissionTypes::Issue) }
+
+  it { expect(described_class.graphql_name).to eq('ExtendedIssue') }
+
+  it { expect(described_class).to require_graphql_authorizations(:read_issue) }
+
+  it { expect(described_class.interfaces).to include(Types::Notes::NoteableType.to_graphql) }
+
+  it 'has specific fields' do
+    fields = Types::IssueType.fields.keys + [:subscribed]
+
+    fields.each do |field_name|
+      expect(described_class).to have_graphql_field(field_name)
+    end
+  end
+end

spec/graphql/types/issue_type_spec.rb

@@ -10,8 +10,9 @@ describe GitlabSchema.types['Issue'] do
   it { expect(described_class.interfaces).to include(Types::Notes::NoteableType.to_graphql) }
 
   it 'has specific fields' do
-    fields = %i[title_html description_html relative_position web_path web_url
-                reference]
+    fields = %i[iid title description state reference author assignees participants labels epic milestone due_date
+                confidential discussion_locked upvotes downvotes user_notes_count web_path web_url relative_position
+                time_estimate total_time_spent closed_at created_at updated_at task_completion_status]
 
     fields.each do |field_name|
       expect(described_class).to have_graphql_field(field_name)

spec/graphql/types/project_type_spec.rb

@@ -25,4 +25,22 @@ describe GitlabSchema.types['Project'] do
 
     is_expected.to have_graphql_fields(*expected_fields)
   end
+
+  describe 'issue field' do
+    subject { described_class.fields['issue'] }
+
+    it 'returns issue' do
+      is_expected.to have_graphql_type(Types::ExtendedIssueType)
+      is_expected.to have_graphql_resolver(Resolvers::IssuesResolver.single)
+    end
+  end
+
+  describe 'issues field' do
+    subject { described_class.fields['issues'] }
+
+    it 'returns issue' do
+      is_expected.to have_graphql_type(Types::IssueType.connection_type)
+      is_expected.to have_graphql_resolver(Resolvers::IssuesResolver)
+    end
+  end
 end

spec/presenters/issue_presenter_spec.rb

@@ -17,13 +17,27 @@ describe IssuePresenter do
 
   describe '#web_url' do
     it 'returns correct path' do
-      expect(presenter.web_url).to eq "http://localhost/#{group.name}/#{project.name}/issues/#{issue.iid}"
+      expect(presenter.web_url).to eq("http://localhost/#{group.name}/#{project.name}/issues/#{issue.iid}")
+    end
+  end
+
+  describe '#subscribed?' do
+    subject { presenter.subscribed? }
+
+    it 'returns not subscribed' do
+      is_expected.to be(false)
+    end
+
+    it 'returns subscribed' do
+      create(:subscription, user: user, project: project, subscribable: issue, subscribed: true)
+
+      is_expected.to be(true)
     end
   end
 
   describe '#issue_path' do
     it 'returns correct path' do
-      expect(presenter.issue_path).to eq "/#{group.name}/#{project.name}/issues/#{issue.iid}"
+      expect(presenter.issue_path).to eq("/#{group.name}/#{project.name}/issues/#{issue.iid}")
     end
   end
 end