Remove project from Job Token Scope via GraphQL

- Introduce service object to remove project from scope
- Use new service object in new GraphQL mutation

Changelog: added

app/graphql/mutations/ci/job_token_scope/remove_project.rb

+# frozen_string_literal: true
+
+module Mutations
+  module Ci
+    module JobTokenScope
+      class RemoveProject < BaseMutation
+        include FindsProject
+
+        graphql_name 'CiJobTokenScopeRemoveProject'
+
+        authorize :admin_project
+
+        argument :project_path, GraphQL::ID_TYPE,
+                 required: true,
+                 description: 'The project that the CI job token scope belongs to.'
+
+        argument :target_project_path, GraphQL::ID_TYPE,
+                 required: true,
+                 description: 'The project to be removed from the CI job token scope.'
+
+        field :ci_job_token_scope,
+          Types::Ci::JobTokenScopeType,
+          null: true,
+          description: "The CI job token's scope of access."
+
+        def resolve(project_path:, target_project_path:)
+          project = authorized_find!(project_path)
+          target_project = Project.find_by_full_path(target_project_path)
+
+          result = ::Ci::JobTokenScope::RemoveProjectService
+            .new(project, current_user)
+            .execute(target_project)
+
+          if result.success?
+            {
+              ci_job_token_scope: ::Ci::JobToken::Scope.new(project),
+              errors: []
+            }
+          else
+            {
+              ci_job_token_scope: nil,
+              errors: [result.message]
+            }
+          end
+        end
+      end
+    end
+  end
+end

app/graphql/types/mutation_type.rb

@@ -100,6 +100,7 @@ module Types
     mount_mutation Mutations::Ci::Job::Play
     mount_mutation Mutations::Ci::Job::Retry
     mount_mutation Mutations::Ci::JobTokenScope::AddProject
+    mount_mutation Mutations::Ci::JobTokenScope::RemoveProject
     mount_mutation Mutations::Ci::Runner::Update, feature_flag: :runner_graphql_query
     mount_mutation Mutations::Ci::Runner::Delete, feature_flag: :runner_graphql_query
     mount_mutation Mutations::Ci::RunnersRegistrationToken::Reset, feature_flag: :runner_graphql_query

app/models/ci/job_token/project_scope_link.rb

@@ -19,6 +19,10 @@ module Ci
       validates :target_project, presence: true
       validate :not_self_referential_link
 
+      def self.for_source_and_target(source_project, target_project)
+        self.find_by(source_project: source_project, target_project: target_project)
+      end
+
       private
 
       def not_self_referential_link

app/services/ci/job_token_scope/add_project_service.rb

@@ -3,13 +3,10 @@
 module Ci
   module JobTokenScope
     class AddProjectService < ::BaseService
-      TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND = "The target_project that you are attempting to access does " \
-          "not exist or you don't have permission to perform this action"
+      include EditScopeValidations
 
       def execute(target_project)
-        if error_response = validation_error(target_project)
-          return error_response
-        end
+        validate_edit!(project, target_project, current_user)
 
         link = add_project!(target_project)
         ServiceResponse.success(payload: { project_link: link })
@@ -18,28 +15,8 @@ module Ci
         ServiceResponse.error(message: "Target project is already in the job token scope")
       rescue ActiveRecord::RecordInvalid => e
         ServiceResponse.error(message: e.message)
-      end
-
-      private
-
-      def validation_error(target_project)
-        unless project.ci_job_token_scope_enabled?
-          return ServiceResponse.error(message: "Job token scope is disabled for this project")
-        end
-
-        unless can?(current_user, :admin_project, project)
-          return ServiceResponse.error(message: "Insufficient permissions to modify the job token scope")
-        end
-
-        unless target_project
-          return ServiceResponse.error(message: TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND)
-        end
-
-        unless can?(current_user, :read_project, target_project)
-          return ServiceResponse.error(message: TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND)
-        end
-
-        nil
+      rescue EditScopeValidations::ValidationError => e
+        ServiceResponse.error(message: e.message)
       end
 
       def add_project!(target_project)

app/services/ci/job_token_scope/remove_project_service.rb

+# frozen_string_literal: true
+
+module Ci
+  module JobTokenScope
+    class RemoveProjectService < ::BaseService
+      include EditScopeValidations
+
+      def execute(target_project)
+        validate_edit!(project, target_project, current_user)
+
+        if project == target_project
+          return ServiceResponse.error(message: "Source project cannot be removed from the job token scope")
+        end
+
+        link = ::Ci::JobToken::ProjectScopeLink.for_source_and_target(project, target_project)
+
+        unless link
+          return ServiceResponse.error(message: "Target project is not in the job token scope")
+        end
+
+        if link.destroy
+          ServiceResponse.success
+        else
+          ServiceResponse.error(message: link.errors.full_messages.to_sentence, payload: { project_link: link })
+        end
+      rescue EditScopeValidations::ValidationError => e
+        ServiceResponse.error(message: e.message)
+      end
+    end
+  end
+end

app/services/concerns/ci/job_token_scope/edit_scope_validations.rb

+# frozen_string_literal: true
+
+module Ci
+  module JobTokenScope
+    module EditScopeValidations
+      ValidationError = Class.new(StandardError)
+
+      TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND = "The target_project that you are attempting to access does " \
+          "not exist or you don't have permission to perform this action"
+
+      def validate_edit!(source_project, target_project, current_user)
+        unless source_project.ci_job_token_scope_enabled?
+          raise ValidationError, "Job token scope is disabled for this project"
+        end
+
+        unless can?(current_user, :admin_project, source_project)
+          raise ValidationError, "Insufficient permissions to modify the job token scope"
+        end
+
+        unless can?(current_user, :read_project, target_project)
+          raise ValidationError, TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND
+        end
+      end
+    end
+  end
+end

doc/api/graphql/reference/index.md

@@ -800,6 +800,26 @@ Input type: `CiJobTokenScopeAddProjectInput`
 | <a id="mutationcijobtokenscopeaddprojectclientmutationid"></a>`clientMutationId` | [`String`](#string) | A unique identifier for the client performing the mutation. |
 | <a id="mutationcijobtokenscopeaddprojecterrors"></a>`errors` | [`[String!]!`](#string) | Errors encountered during execution of the mutation. |
 
+### `Mutation.ciJobTokenScopeRemoveProject`
+
+Input type: `CiJobTokenScopeRemoveProjectInput`
+
+#### Arguments
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="mutationcijobtokenscoperemoveprojectclientmutationid"></a>`clientMutationId` | [`String`](#string) | A unique identifier for the client performing the mutation. |
+| <a id="mutationcijobtokenscoperemoveprojectprojectpath"></a>`projectPath` | [`ID!`](#id) | The project that the CI job token scope belongs to. |
+| <a id="mutationcijobtokenscoperemoveprojecttargetprojectpath"></a>`targetProjectPath` | [`ID!`](#id) | The project to be removed from the CI job token scope. |
+
+#### Fields
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="mutationcijobtokenscoperemoveprojectcijobtokenscope"></a>`ciJobTokenScope` | [`CiJobTokenScopeType`](#cijobtokenscopetype) | The CI job token's scope of access. |
+| <a id="mutationcijobtokenscoperemoveprojectclientmutationid"></a>`clientMutationId` | [`String`](#string) | A unique identifier for the client performing the mutation. |
+| <a id="mutationcijobtokenscoperemoveprojecterrors"></a>`errors` | [`[String!]!`](#string) | Errors encountered during execution of the mutation. |
+
 ### `Mutation.clusterAgentDelete`
 
 Input type: `ClusterAgentDeleteInput`

spec/graphql/mutations/ci/job_token_scope/remove_project_spec.rb

+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Mutations::Ci::JobTokenScope::RemoveProject do
+  let(:mutation) do
+    described_class.new(object: nil, context: { current_user: current_user }, field: nil)
+  end
+
+  describe '#resolve' do
+    let_it_be(:project) { create(:project) }
+    let_it_be(:target_project) { create(:project) }
+
+    let_it_be(:link) do
+      create(:ci_job_token_project_scope_link,
+        source_project: project,
+        target_project: target_project)
+    end
+
+    let(:target_project_path) { target_project.full_path }
+
+    subject do
+      mutation.resolve(project_path: project.full_path, target_project_path: target_project_path)
+    end
+
+    context 'when user is not logged in' do
+      let(:current_user) { nil }
+
+      it 'raises error' do
+        expect { subject }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+      end
+    end
+
+    context 'when user is logged in' do
+      let(:current_user) { create(:user) }
+
+      context 'when user does not have permissions to admin project' do
+        it 'raises error' do
+          expect { subject }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+        end
+      end
+
+      context 'when user has permissions to admin project and read target project' do
+        before do
+          project.add_maintainer(current_user)
+          target_project.add_guest(current_user)
+        end
+
+        it 'removes target project from the job token scope' do
+          expect do
+            expect(subject).to include(ci_job_token_scope: be_present, errors: be_empty)
+          end.to change { Ci::JobToken::ProjectScopeLink.count }.by(-1)
+        end
+
+        context 'when the service returns an error' do
+          let(:service) { double(:service) }
+
+          it 'returns an error response' do
+            expect(::Ci::JobTokenScope::RemoveProjectService).to receive(:new).with(project, current_user).and_return(service)
+            expect(service).to receive(:execute).with(target_project).and_return(ServiceResponse.error(message: 'The error message'))
+
+            expect(subject.fetch(:ci_job_token_scope)).to be_nil
+            expect(subject.fetch(:errors)).to include("The error message")
+          end
+        end
+      end
+    end
+  end
+end

spec/models/ci/job_token/project_scope_link_spec.rb

@@ -65,4 +65,22 @@ RSpec.describe Ci::JobToken::ProjectScopeLink do
       expect(subject).to contain_exactly(target_link)
     end
   end
+
+  describe '.for_source_and_target' do
+    let_it_be(:link) { create(:ci_job_token_project_scope_link, source_project: project) }
+
+    subject { described_class.for_source_and_target(project, target_project) }
+
+    context 'when link is found' do
+      let(:target_project) { link.target_project }
+
+      it { is_expected.to eq(link) }
+    end
+
+    context 'when link is not found' do
+      let(:target_project) { create(:project) }
+
+      it { is_expected.to be_nil }
+    end
+  end
 end

spec/requests/api/graphql/mutations/ci/job_token_scope/add_project_spec.rb

@@ -71,7 +71,7 @@ RSpec.describe 'CiJobTokenScopeAddProject' do
       it 'has mutation errors' do
         post_graphql_mutation(mutation, current_user: current_user)
 
-        expect(mutation_response['errors']).to contain_exactly(Ci::JobTokenScope::AddProjectService::TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND)
+        expect(mutation_response['errors']).to contain_exactly(Ci::JobTokenScope::EditScopeValidations::TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND)
       end
     end
   end

spec/requests/api/graphql/mutations/ci/job_token_scope/remove_project_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'CiJobTokenScopeRemoveProject' do
+  include GraphqlHelpers
+
+  let_it_be(:project) { create(:project) }
+  let_it_be(:target_project) { create(:project) }
+
+  let_it_be(:link) do
+    create(:ci_job_token_project_scope_link,
+      source_project: project,
+      target_project: target_project)
+  end
+
+  let(:variables) do
+    {
+      project_path: project.full_path,
+      target_project_path: target_project.full_path
+    }
+  end
+
+  let(:mutation) do
+    graphql_mutation(:ci_job_token_scope_remove_project, variables) do
+      <<~QL
+        errors
+        ciJobTokenScope {
+          projects {
+            nodes {
+              path
+            }
+          }
+        }
+      QL
+    end
+  end
+
+  let(:mutation_response) { graphql_mutation_response(:ci_job_token_scope_remove_project) }
+
+  context 'when unauthorized' do
+    let(:current_user) { create(:user) }
+
+    context 'when not a maintainer' do
+      before do
+        project.add_developer(current_user)
+      end
+
+      it 'has graphql errors' do
+        post_graphql_mutation(mutation, current_user: current_user)
+
+        expect(graphql_errors).not_to be_empty
+      end
+    end
+  end
+
+  context 'when authorized' do
+    let_it_be(:current_user) { project.owner }
+
+    before do
+      target_project.add_guest(current_user)
+    end
+
+    it 'removes the target project from the job token scope' do
+      expect do
+        post_graphql_mutation(mutation, current_user: current_user)
+        expect(response).to have_gitlab_http_status(:success)
+        expect(mutation_response.dig('ciJobTokenScope', 'projects', 'nodes')).not_to be_empty
+      end.to change { Ci::JobToken::Scope.new(project).includes?(target_project) }.from(true).to(false)
+    end
+
+    context 'when invalid target project is provided' do
+      before do
+        variables[:target_project_path] = 'unknown/project'
+      end
+
+      it 'has mutation errors' do
+        post_graphql_mutation(mutation, current_user: current_user)
+
+        expect(mutation_response['errors']).to contain_exactly(Ci::JobTokenScope::EditScopeValidations::TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND)
+      end
+    end
+  end
+end

spec/services/ci/job_token_scope/add_project_service_spec.rb

@@ -11,68 +11,28 @@ RSpec.describe Ci::JobTokenScope::AddProjectService do
   describe '#execute' do
     subject(:result) { service.execute(target_project) }
 
-    shared_examples 'returns error' do |error|
-      it 'returns an error response', :aggregate_failures do
-        expect(result).to be_error
-        expect(result.message).to eq(error)
-      end
-    end
-
-    context 'when job token scope is disabled for the given project' do
-      before do
-        allow(project).to receive(:ci_job_token_scope_enabled?).and_return(false)
-      end
-
-      it_behaves_like 'returns error', 'Job token scope is disabled for this project'
-    end
-
-    context 'when user does not have permissions to edit the job token scope' do
-      it_behaves_like 'returns error', 'Insufficient permissions to modify the job token scope'
-    end
-
-    context 'when user has permissions to edit the job token scope' do
-      before do
-        project.add_maintainer(current_user)
-      end
-
-      context 'when target project is not provided' do
-        let(:target_project) { nil }
-
-        it_behaves_like 'returns error', Ci::JobTokenScope::AddProjectService::TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND
-      end
-
-      context 'when target project is provided' do
-        context 'when user does not have permissions to read the target project' do
-          it_behaves_like 'returns error', Ci::JobTokenScope::AddProjectService::TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND
+    it_behaves_like 'editable job token scope' do
+      context 'when user has permissions on source and target projects' do
+        before do
+          project.add_maintainer(current_user)
+          target_project.add_developer(current_user)
         end
 
-        context 'when user has permissions to read the target project' do
-          before do
-            target_project.add_guest(current_user)
-          end
-
-          it 'adds the project to the scope' do
-            expect do
-              expect(result).to be_success
-            end.to change { Ci::JobToken::ProjectScopeLink.count }.by(1)
-          end
-
-          context 'when target project is already in scope' do
-            before do
-              create(:ci_job_token_project_scope_link,
-                source_project: project,
-                target_project: target_project)
-            end
+        it 'adds the project to the scope' do
+          expect do
+            expect(result).to be_success
+          end.to change { Ci::JobToken::ProjectScopeLink.count }.by(1)
+        end
+      end
 
-            it_behaves_like 'returns error', "Target project is already in the job token scope"
-          end
+      context 'when target project is same as the source project' do
+        before do
+          project.add_maintainer(current_user)
         end
 
-        context 'when target project is same as the source project' do
-          let(:target_project) { project }
+        let(:target_project) { project }
 
-          it_behaves_like 'returns error', "Validation failed: Target project can't be the same as the source project"
-        end
+        it_behaves_like 'returns error', "Validation failed: Target project can't be the same as the source project"
       end
     end
   end

spec/services/ci/job_token_scope/remove_project_service_spec.rb

+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Ci::JobTokenScope::RemoveProjectService do
+  let(:service) { described_class.new(project, current_user) }
+
+  let_it_be(:project) { create(:project) }
+  let_it_be(:target_project) { create(:project) }
+  let_it_be(:current_user) { create(:user) }
+
+  let_it_be(:link) do
+    create(:ci_job_token_project_scope_link,
+      source_project: project,
+      target_project: target_project)
+  end
+
+  describe '#execute' do
+    subject(:result) { service.execute(target_project) }
+
+    it_behaves_like 'editable job token scope' do
+      context 'when user has permissions on source and target project' do
+        before do
+          project.add_maintainer(current_user)
+          target_project.add_developer(current_user)
+        end
+
+        it 'removes the project from the scope' do
+          expect do
+            expect(result).to be_success
+          end.to change { Ci::JobToken::ProjectScopeLink.count }.by(-1)
+        end
+      end
+
+      context 'when target project is same as the source project' do
+        before do
+          project.add_maintainer(current_user)
+        end
+
+        let(:target_project) { project }
+
+        it_behaves_like 'returns error', "Source project cannot be removed from the job token scope"
+      end
+    end
+  end
+end

spec/support/shared_examples/ci/edit_job_token_scope_shared_examples.rb

+# frozen_string_literal: true
+
+RSpec.shared_examples 'editable job token scope' do
+  shared_examples 'returns error' do |error|
+    it 'returns an error response', :aggregate_failures do
+      expect(result).to be_error
+      expect(result.message).to eq(error)
+    end
+  end
+
+  context 'when job token scope is disabled for the given project' do
+    before do
+      allow(project).to receive(:ci_job_token_scope_enabled?).and_return(false)
+    end
+
+    it_behaves_like 'returns error', 'Job token scope is disabled for this project'
+  end
+
+  context 'when user does not have permissions to edit the job token scope' do
+    it_behaves_like 'returns error', 'Insufficient permissions to modify the job token scope'
+  end
+
+  context 'when user has permissions to edit the job token scope' do
+    before do
+      project.add_maintainer(current_user)
+    end
+
+    context 'when target project is not provided' do
+      let(:target_project) { nil }
+
+      it_behaves_like 'returns error', Ci::JobTokenScope::EditScopeValidations::TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND
+    end
+
+    context 'when target project is provided' do
+      context 'when user does not have permissions to read the target project' do
+        it_behaves_like 'returns error', Ci::JobTokenScope::EditScopeValidations::TARGET_PROJECT_UNAUTHORIZED_OR_UNFOUND
+      end
+    end
+  end
+end