Added classes for group_deploy_keys_groups

Added GroupDeployKeysGroup model.
Added serializer for GroupDeployKeysGroup.
Added two related policies.
Added relevant rspecs.

app/models/group.rb

@@ -64,6 +64,8 @@ class Group < Namespace
 
   has_one :import_state, class_name: 'GroupImportState', inverse_of: :group
 
+  has_many :group_deploy_keys_groups, inverse_of: :group
+  has_many :group_deploy_keys, through: :group_deploy_keys_groups
   has_many :group_deploy_tokens
   has_many :deploy_tokens, through: :group_deploy_tokens
 

app/models/group_deploy_key.rb

@@ -3,9 +3,31 @@
 class GroupDeployKey < Key
   self.table_name = 'group_deploy_keys'
 
+  has_many :group_deploy_keys_groups, inverse_of: :group_deploy_key, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent
+  has_many :groups, through: :group_deploy_keys_groups
+
   validates :user, presence: true
 
   def type
     'DeployKey'
   end
+
+  def group_deploy_keys_group_for(group)
+    group_deploy_keys_groups.find_by(group: group)
+  end
+
+  def can_be_edited_for?(user, group)
+    Ability.allowed?(user, :update_group_deploy_key, self) ||
+      Ability.allowed?(
+        user,
+        :update_group_deploy_key_for_group,
+        group_deploy_keys_group_for(group)
+      )
+  end
+
+  def group_deploy_keys_groups_for_user(user)
+    group_deploy_keys_groups.select do |group_deploy_keys_group|
+      Ability.allowed?(user, :read_group, group_deploy_keys_group.group)
+    end
+  end
 end

app/models/group_deploy_keys_group.rb

+# frozen_string_literal: true
+
+class GroupDeployKeysGroup < ApplicationRecord
+  belongs_to :group, inverse_of: :group_deploy_keys_groups
+  belongs_to :group_deploy_key, inverse_of: :group_deploy_keys_groups
+
+  validates :group_deploy_key, presence: true
+  validates :group_deploy_key_id, uniqueness: { scope: [:group_id], message: "already exists in group" }
+  validates :group_id, presence: true
+end

app/models/user.rb

@@ -104,6 +104,7 @@ class User < ApplicationRecord
   # Profile
   has_many :keys, -> { regular_keys }, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent
   has_many :deploy_keys, -> { where(type: 'DeployKey') }, dependent: :nullify # rubocop:disable Cop/ActiveRecordDependent
+  has_many :group_deploy_keys
   has_many :gpg_keys
 
   has_many :emails, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent

app/policies/group_deploy_key_policy.rb

+# frozen_string_literal: true
+
+class GroupDeployKeyPolicy < BasePolicy
+  with_options scope: :subject, score: 0
+  condition(:user_owns_group_deploy_key) { @subject.user_id == @user.id }
+
+  rule { user_owns_group_deploy_key }.enable :update_group_deploy_key
+end

app/policies/group_deploy_keys_group_policy.rb

+# frozen_string_literal: true
+
+class GroupDeployKeysGroupPolicy < BasePolicy
+  with_options scope: :subject, score: 0
+  delegate { @subject.group }
+  condition(:user_is_group_owner) { @subject.group.has_owner?(@user) }
+
+  rule { user_is_group_owner }.enable :update_group_deploy_key_for_group
+end

app/serializers/group_basic_entity.rb

+# frozen_string_literal: true
+
+class GroupBasicEntity < Grape::Entity
+  include RequestAwareEntity
+
+  expose :id
+  expose :name
+  expose :full_path
+  expose :full_name
+end

app/serializers/group_deploy_key_entity.rb

+# frozen_string_literal: true
+
+class GroupDeployKeyEntity < Grape::Entity
+  expose :id
+  expose :user_id
+  expose :title
+  expose :fingerprint
+  expose :fingerprint_sha256
+  expose :created_at
+  expose :updated_at
+  expose :group_deploy_keys_groups, using: GroupDeployKeysGroupEntity do |group_deploy_key|
+    group_deploy_key.group_deploy_keys_groups_for_user(options[:user])
+  end
+  expose :can_edit do |group_deploy_key|
+    group_deploy_key.can_be_edited_for?(options[:user], options[:group])
+  end
+end

app/serializers/group_deploy_key_serializer.rb

+# frozen_string_literal: true
+
+class GroupDeployKeySerializer < BaseSerializer
+  entity GroupDeployKeyEntity
+end

app/serializers/group_deploy_keys_group_entity.rb

+# frozen_string_literal: true
+
+class GroupDeployKeysGroupEntity < Grape::Entity
+  expose :can_push
+  expose :group, using: GroupBasicEntity
+end

spec/factories/group_deploy_keys_groups.rb

+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :group_deploy_keys_group do
+    group_deploy_key
+    group
+    can_push { true }
+  end
+end

spec/models/group_deploy_key_spec.rb

@@ -4,8 +4,82 @@ require 'spec_helper'
 
 RSpec.describe GroupDeployKey do
   it { is_expected.to validate_presence_of(:user) }
+  it { is_expected.to belong_to(:user) }
+  it { is_expected.to have_many(:groups) }
+
+  let_it_be(:group_deploy_key) { create(:group_deploy_key) }
+  let_it_be(:group) { create(:group) }
 
   it 'is of type DeployKey' do
     expect(build(:group_deploy_key).type).to eq('DeployKey')
   end
+
+  describe '#group_deploy_keys_group_for' do
+    subject { group_deploy_key.group_deploy_keys_group_for(group) }
+
+    context 'when this group deploy key is linked to a given group' do
+      it 'returns the relevant group_deploy_keys_group association' do
+        group_deploy_keys_group = create(:group_deploy_keys_group, group: group, group_deploy_key: group_deploy_key)
+
+        expect(subject).to eq(group_deploy_keys_group)
+      end
+    end
+
+    context 'when this group deploy key is not linked to a given group' do
+      it { is_expected.to be_nil }
+    end
+  end
+
+  describe '#can_be_edited_for' do
+    let_it_be(:user) { create(:user) }
+
+    subject { group_deploy_key.can_be_edited_for?(user, group) }
+
+    context 'when a given user has the :update_group_deploy_key permission for that key' do
+      it 'is true' do
+        allow(Ability).to receive(:allowed?).with(user, :update_group_deploy_key, group_deploy_key).and_return(true)
+
+        expect(subject).to be_truthy
+      end
+    end
+
+    context 'when a given user does not have the :update_group_deploy_key permission for that key' do
+      before do
+        allow(Ability).to receive(:allowed?).with(user, :update_group_deploy_key, group_deploy_key).and_return(false)
+      end
+
+      it 'is true when this user has the :update_group_deploy_key_for_group permission for this group' do
+        allow(Ability).to receive(:allowed?).with(user, :update_group_deploy_key_for_group, group_deploy_key.group_deploy_keys_group_for(group)).and_return(true)
+
+        expect(subject).to be_truthy
+      end
+
+      it 'is false when this user does not have the :update_group_deploy_key_for_group permission for this group' do
+        allow(Ability).to receive(:allowed?).with(user, :update_group_deploy_key_for_group, group_deploy_key.group_deploy_keys_group_for(group)).and_return(false)
+
+        expect(subject).to be_falsey
+      end
+    end
+  end
+
+  describe '#group_deploy_keys_groups_for_user' do
+    let_it_be(:user) { create(:user) }
+
+    context 'when a group has a group deploy key' do
+      let_it_be(:expected_association) { create(:group_deploy_keys_group, group: group, group_deploy_key: group_deploy_key) }
+
+      it 'returns the related group_deploy_keys_group association when the user can read the group' do
+        allow(Ability).to receive(:allowed?).with(user, :read_group, group).and_return(true)
+
+        expect(group_deploy_key.group_deploy_keys_groups_for_user(user))
+          .to contain_exactly(expected_association)
+      end
+
+      it 'does not return the related group_deploy_keys_group association when the user cannot read the group' do
+        allow(Ability).to receive(:allowed?).with(user, :read_group, group).and_return(false)
+
+        expect(group_deploy_key.group_deploy_keys_groups_for_user(user)).to be_empty
+      end
+    end
+  end
 end

spec/models/group_deploy_keys_group_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GroupDeployKeysGroup do
+  describe "Associations" do
+    it { is_expected.to belong_to(:group_deploy_key) }
+    it { is_expected.to belong_to(:group) }
+  end
+
+  describe "Validation" do
+    it { is_expected.to validate_presence_of(:group_id) }
+    it { is_expected.to validate_presence_of(:group_deploy_key) }
+  end
+end

spec/models/group_spec.rb

@@ -26,6 +26,7 @@ RSpec.describe Group do
     it { is_expected.to have_many(:container_repositories) }
     it { is_expected.to have_many(:milestones) }
     it { is_expected.to have_many(:iterations) }
+    it { is_expected.to have_many(:group_deploy_keys) }
 
     describe '#members & #requesters' do
       let(:requester) { create(:user) }

spec/models/user_spec.rb

@@ -76,6 +76,7 @@ RSpec.describe User do
     it { is_expected.to have_many(:groups) }
     it { is_expected.to have_many(:keys).dependent(:destroy) }
     it { is_expected.to have_many(:deploy_keys).dependent(:nullify) }
+    it { is_expected.to have_many(:group_deploy_keys) }
     it { is_expected.to have_many(:events).dependent(:delete_all) }
     it { is_expected.to have_many(:issues).dependent(:destroy) }
     it { is_expected.to have_many(:notes).dependent(:destroy) }

spec/policies/group_deploy_key_policy_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GroupDeployKeyPolicy do
+  subject { described_class.new(user, group_deploy_key) }
+
+  let_it_be(:user) { create(:user) }
+
+  describe 'edit a group deploy key' do
+    context 'when the user does not own the group deploy key' do
+      let(:group_deploy_key) { create(:group_deploy_key) }
+
+      it { is_expected.to be_disallowed(:update_group_deploy_key) }
+    end
+
+    context 'when the user owns the group deploy key' do
+      let(:group_deploy_key) { create(:group_deploy_key, user: user) }
+
+      before do
+        user.reload
+      end
+
+      it { is_expected.to be_allowed(:update_group_deploy_key) }
+    end
+  end
+end

spec/policies/group_deploy_keys_group_policy_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GroupDeployKeysGroupPolicy do
+  subject { described_class.new(user, group_deploy_keys_group) }
+
+  let_it_be(:user) { create(:user) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:group_deploy_key) { create(:group_deploy_key) }
+  let(:group_deploy_keys_group) { create(:group_deploy_keys_group, group: group, group_deploy_key: group_deploy_key) }
+
+  describe 'edit a group deploy key for a given group' do
+    it 'is allowed when the user is an owner of this group' do
+      group.add_owner(user)
+
+      expect(subject).to be_allowed(:update_group_deploy_key_for_group)
+    end
+
+    it 'is not allowed when the user is not an owner of this group' do
+      expect(subject).to be_disallowed(:update_group_deploy_key_for_group)
+    end
+  end
+end

spec/serializers/group_deploy_key_entity_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GroupDeployKeyEntity do
+  include RequestAwareEntity
+
+  let(:user) { create(:user) }
+  let(:group) { create(:group) }
+  let(:group_deploy_key) { create(:group_deploy_key) }
+  let(:options) { { user: user } }
+
+  let(:entity) { described_class.new(group_deploy_key, options) }
+
+  before do
+    group.group_deploy_keys << group_deploy_key
+  end
+
+  describe 'returns group deploy keys with a group a user can read' do
+    let(:expected_result) do
+      {
+        id: group_deploy_key.id,
+        user_id: group_deploy_key.user_id,
+        title: group_deploy_key.title,
+        fingerprint: group_deploy_key.fingerprint,
+        fingerprint_sha256: group_deploy_key.fingerprint_sha256,
+        created_at: group_deploy_key.created_at,
+        updated_at: group_deploy_key.updated_at,
+        can_edit: false,
+        group_deploy_keys_groups: [
+          {
+            can_push: false,
+            group:
+            {
+              id: group.id,
+              name: group.name,
+              full_path: group.full_path,
+              full_name: group.full_name
+            }
+          }
+        ]
+      }
+    end
+
+    it { expect(entity.as_json).to eq(expected_result) }
+  end
+end