Add delete on-call schedule GraphQL mutation

Add a GraphQL mutation to remove on-call schedules

doc/api/graphql/reference/gitlab_schema.graphql

@@ -14057,6 +14057,7 @@ type Mutation {
   mergeRequestUpdate(input: MergeRequestUpdateInput!): MergeRequestUpdatePayload
   namespaceIncreaseStorageTemporarily(input: NamespaceIncreaseStorageTemporarilyInput!): NamespaceIncreaseStorageTemporarilyPayload
   oncallScheduleCreate(input: OncallScheduleCreateInput!): OncallScheduleCreatePayload
+  oncallScheduleDestroy(input: OncallScheduleDestroyInput!): OncallScheduleDestroyPayload
   pipelineCancel(input: PipelineCancelInput!): PipelineCancelPayload
   pipelineDestroy(input: PipelineDestroyInput!): PipelineDestroyPayload
   pipelineRetry(input: PipelineRetryInput!): PipelineRetryPayload
@@ -14684,6 +14685,46 @@ type OncallScheduleCreatePayload {
   oncallSchedule: IncidentManagementOncallSchedule
 }
 
+"""
+Autogenerated input type of OncallScheduleDestroy
+"""
+input OncallScheduleDestroyInput {
+  """
+  A unique identifier for the client performing the mutation.
+  """
+  clientMutationId: String
+
+  """
+  The on-call schedule internal ID to remove
+  """
+  iid: String!
+
+  """
+  The project to remove the on-call schedule from
+  """
+  projectPath: ID!
+}
+
+"""
+Autogenerated return type of OncallScheduleDestroy
+"""
+type OncallScheduleDestroyPayload {
+  """
+  A unique identifier for the client performing the mutation.
+  """
+  clientMutationId: String
+
+  """
+  Errors encountered during execution of the mutation.
+  """
+  errors: [String!]!
+
+  """
+  The on-call schedule
+  """
+  oncallSchedule: IncidentManagementOncallSchedule
+}
+
 """
 Represents a package
 """

doc/api/graphql/reference/gitlab_schema.json

@@ -40867,6 +40867,33 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "oncallScheduleDestroy",
+              "description": null,
+              "args": [
+                {
+                  "name": "input",
+                  "description": null,
+                  "type": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "INPUT_OBJECT",
+                      "name": "OncallScheduleDestroyInput",
+                      "ofType": null
+                    }
+                  },
+                  "defaultValue": null
+                }
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "OncallScheduleDestroyPayload",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "pipelineCancel",
               "description": null,
@@ -43617,6 +43644,122 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "INPUT_OBJECT",
+          "name": "OncallScheduleDestroyInput",
+          "description": "Autogenerated input type of OncallScheduleDestroy",
+          "fields": null,
+          "inputFields": [
+            {
+              "name": "projectPath",
+              "description": "The project to remove the on-call schedule from",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "ID",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "iid",
+              "description": "The on-call schedule internal ID to remove",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "clientMutationId",
+              "description": "A unique identifier for the client performing the mutation.",
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "defaultValue": null
+            }
+          ],
+          "interfaces": null,
+          "enumValues": null,
+          "possibleTypes": null
+        },
+        {
+          "kind": "OBJECT",
+          "name": "OncallScheduleDestroyPayload",
+          "description": "Autogenerated return type of OncallScheduleDestroy",
+          "fields": [
+            {
+              "name": "clientMutationId",
+              "description": "A unique identifier for the client performing the mutation.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "errors",
+              "description": "Errors encountered during execution of the mutation.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "LIST",
+                  "name": null,
+                  "ofType": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "SCALAR",
+                      "name": "String",
+                      "ofType": null
+                    }
+                  }
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "oncallSchedule",
+              "description": "The on-call schedule",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "IncidentManagementOncallSchedule",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "inputFields": null,
+          "interfaces": [
+
+          ],
+          "enumValues": null,
+          "possibleTypes": null
+        },
         {
           "kind": "OBJECT",
           "name": "Package",

doc/api/graphql/reference/index.md

@@ -2237,6 +2237,16 @@ Autogenerated return type of OncallScheduleCreate.
 | `errors` | String! => Array | Errors encountered during execution of the mutation. |
 | `oncallSchedule` | IncidentManagementOncallSchedule | The on-call schedule |
 
+### OncallScheduleDestroyPayload
+
+Autogenerated return type of OncallScheduleDestroy.
+
+| Field | Type | Description |
+| ----- | ---- | ----------- |
+| `clientMutationId` | String | A unique identifier for the client performing the mutation. |
+| `errors` | String! => Array | Errors encountered during execution of the mutation. |
+| `oncallSchedule` | IncidentManagementOncallSchedule | The on-call schedule |
+
 ### Package
 
 Represents a package.

ee/app/finders/incident_management/oncall_schedules_finder.rb

@@ -11,7 +11,10 @@ module IncidentManagement
     def execute
       return IncidentManagement::OncallSchedule.none unless available? && allowed?
 
-      project.incident_management_oncall_schedules
+      collection = project.incident_management_oncall_schedules
+      collection = by_iid(collection)
+
+      collection
     end
 
     private
@@ -26,5 +29,11 @@ module IncidentManagement
     def allowed?
       Ability.allowed?(current_user, :read_incident_management_oncall_schedule, project)
     end
+
+    def by_iid(collection)
+      return collection unless params[:iid]
+
+      collection.for_iid(params[:iid])
+    end
   end
 end

ee/app/graphql/ee/types/mutation_type.rb

@@ -49,6 +49,7 @@ module EE
         mount_mutation ::Mutations::Admin::Analytics::DevopsAdoption::Segments::Update
         mount_mutation ::Mutations::Admin::Analytics::DevopsAdoption::Segments::Delete
         mount_mutation ::Mutations::IncidentManagement::OncallSchedule::Create
+        mount_mutation ::Mutations::IncidentManagement::OncallSchedule::Destroy
 
         prepend(Types::DeprecatedMutations)
       end

ee/app/graphql/mutations/incident_management/oncall_schedule/destroy.rb

+# frozen_string_literal: true
+
+module Mutations
+  module IncidentManagement
+    module OncallSchedule
+      class Destroy < OncallScheduleBase
+        graphql_name 'OncallScheduleDestroy'
+
+        argument :project_path, GraphQL::ID_TYPE,
+                 required: true,
+                 description: 'The project to remove the on-call schedule from'
+
+        argument :iid, GraphQL::STRING_TYPE,
+                 required: true,
+                 description: 'The on-call schedule internal ID to remove'
+
+        def resolve(project_path:, iid:)
+          oncall_schedule = authorized_find!(project_path: project_path, iid: iid)
+
+          response ::IncidentManagement::OncallSchedules::DestroyService.new(
+            oncall_schedule,
+            current_user
+          ).execute
+        end
+      end
+    end
+  end
+end

ee/app/graphql/mutations/incident_management/oncall_schedule/oncall_schedule_base.rb

@@ -19,6 +19,14 @@ module Mutations
             errors: result.errors
           }
         end
+
+        def find_object(project_path:, **args)
+          project = Project.find_by_full_path(project_path)
+
+          return unless project
+
+          ::IncidentManagement::OncallSchedulesFinder.new(current_user, project, args).execute.first
+        end
       end
     end
   end

ee/app/models/incident_management/oncall_schedule.rb

@@ -18,6 +18,8 @@ module IncidentManagement
     validates :description, length: { maximum: DESCRIPTION_LENGTH }
     validates :timezone, presence: true, inclusion: { in: :timezones }
 
+    scope :for_iid, -> (iid) { where(iid: iid) }
+
     private
 
     def timezones

ee/app/services/incident_management/oncall_schedules/destroy_service.rb

+# frozen_string_literal: true
+
+module IncidentManagement
+  module OncallSchedules
+    class DestroyService
+      # @param oncall_schedule [IncidentManagement::OncallSchedule]
+      # @param user [User]
+      def initialize(oncall_schedule, user)
+        @oncall_schedule = oncall_schedule
+        @user = user
+        @project = oncall_schedule.project
+      end
+
+      def execute
+        return error_no_license unless available?
+        return error_no_permissions unless allowed?
+
+        if oncall_schedule.destroy
+          success
+        else
+          error(oncall_schedule.errors.full_messages.to_sentence)
+        end
+      end
+
+      private
+
+      attr_reader :oncall_schedule, :user, :project
+
+      def allowed?
+        user&.can?(:admin_incident_management_oncall_schedule, project)
+      end
+
+      def available?
+        Feature.enabled?(:oncall_schedules_mvc, project) &&
+          project.feature_available?(:oncall_schedules)
+      end
+
+      def error(message)
+        ServiceResponse.error(message: message)
+      end
+
+      def success
+        ServiceResponse.success(payload: { oncall_schedule: oncall_schedule })
+      end
+
+      def error_no_permissions
+        error(_('You have insufficient permissions to remove an on-call schedule from this project'))
+      end
+
+      def error_no_license
+        error(_('Your license does not support on-call schedules'))
+      end
+    end
+  end
+end

ee/spec/factories/incident_management/oncall_schedules.rb

@@ -3,7 +3,7 @@
 FactoryBot.define do
   factory :incident_management_oncall_schedule, class: 'IncidentManagement::OncallSchedule' do
     project
-    name { 'Default On-call Schedule' }
+    sequence(:name) { |n| "On-call Schedule ##{n}" }
     description { 'On-call description' }
     timezone { 'Europe/Berlin' }
   end

ee/spec/finders/incident_management/oncall_schedules_finder_spec.rb

@@ -6,10 +6,12 @@ RSpec.describe IncidentManagement::OncallSchedulesFinder do
   let_it_be(:current_user) { create(:user) }
   let_it_be_with_refind(:project) { create(:project) }
   let_it_be(:oncall_schedule) { create(:incident_management_oncall_schedule, project: project) }
-  let_it_be(:another_oncall_schedule) { create(:incident_management_oncall_schedule) }
+  let_it_be(:another_oncall_schedule) { create(:incident_management_oncall_schedule, project: project) }
+  let_it_be(:oncall_schedule_from_another_project) { create(:incident_management_oncall_schedule) }
+  let(:params) { {} }
 
   describe '#execute' do
-    subject(:execute) { described_class.new(current_user, project).execute }
+    subject(:execute) { described_class.new(current_user, project, params).execute }
 
     context 'when feature is available' do
       before do
@@ -22,7 +24,15 @@ RSpec.describe IncidentManagement::OncallSchedulesFinder do
         end
 
         it 'returns project on-call schedules' do
-          is_expected.to contain_exactly(oncall_schedule)
+          is_expected.to contain_exactly(oncall_schedule, another_oncall_schedule)
+        end
+
+        context 'when iid given' do
+          let(:params) { { iid: oncall_schedule.iid } }
+
+          it 'returns an on-call schedule for iid' do
+            is_expected.to contain_exactly(oncall_schedule)
+          end
         end
 
         context 'when feature flag is disabled' do

ee/spec/graphql/mutations/incident_management/oncall_schedule/destroy_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::IncidentManagement::OncallSchedule::Destroy do
+  let_it_be(:current_user) { create(:user) }
+  let_it_be(:project) { create(:project) }
+  let(:oncall_schedule) { create(:incident_management_oncall_schedule, project: project) }
+  let(:args) { { project_path: project.full_path, iid: oncall_schedule.iid.to_s } }
+
+  specify { expect(described_class).to require_graphql_authorizations(:admin_incident_management_oncall_schedule) }
+
+  before do
+    stub_licensed_features(oncall_schedules: true)
+  end
+
+  describe '#resolve' do
+    subject(:resolve) { mutation_for(project, current_user).resolve(args) }
+
+    context 'user has access to project' do
+      before do
+        project.add_maintainer(current_user)
+      end
+
+      context 'when OncallSchedules::DestroyService responds with success' do
+        it 'returns the on-call schedule with no errors' do
+          expect(resolve).to eq(
+            oncall_schedule: oncall_schedule,
+            errors: []
+          )
+        end
+      end
+
+      context 'when OncallSchedules::DestroyService responds with an error' do
+        before do
+          allow_any_instance_of(::IncidentManagement::OncallSchedules::DestroyService)
+            .to receive(:execute)
+            .and_return(ServiceResponse.error(payload: { oncall_schedule: nil }, message: 'An error has occurred'))
+        end
+
+        it 'returns errors' do
+          expect(resolve).to eq(
+            oncall_schedule: nil,
+            errors: ['An error has occurred']
+          )
+        end
+      end
+    end
+
+    context 'when resource is not accessible to the user' do
+      it 'raises an error' do
+        expect { resolve }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+      end
+    end
+  end
+
+  private
+
+  def mutation_for(project, user)
+    described_class.new(object: project, context: { current_user: user }, field: nil)
+  end
+end

ee/spec/models/incident_management/oncall_schedule_spec.rb

@@ -11,8 +11,9 @@ RSpec.describe IncidentManagement::OncallSchedule do
 
   describe '.validations' do
     let(:timezones) { ActiveSupport::TimeZone.all.map { |tz| tz.tzinfo.identifier } }
+    let(:name) { 'Default on-call schedule' }
 
-    subject { build(:incident_management_oncall_schedule, project: project) }
+    subject { build(:incident_management_oncall_schedule, project: project, name: name) }
 
     it { is_expected.to validate_presence_of(:name) }
     it { is_expected.to validate_length_of(:name).is_at_most(200) }
@@ -22,7 +23,7 @@ RSpec.describe IncidentManagement::OncallSchedule do
 
     context 'when the oncall schedule with the same name exists' do
       before do
-        create(:incident_management_oncall_schedule, project: project)
+        create(:incident_management_oncall_schedule, project: project, name: name)
       end
 
       it 'has validation errors' do
@@ -39,4 +40,13 @@ RSpec.describe IncidentManagement::OncallSchedule do
     let(:scope_attrs) { { project: instance.project } }
     let(:usage) { :incident_management_oncall_schedules }
   end
+
+  describe '.for_iid' do
+    let_it_be(:oncall_schedule1) { create(:incident_management_oncall_schedule, project: project) }
+    let_it_be(:oncall_schedule2) { create(:incident_management_oncall_schedule, project: project) }
+
+    it 'returns only records with that IID' do
+      expect(described_class.for_iid(oncall_schedule1.iid)).to contain_exactly(oncall_schedule1)
+    end
+  end
 end

ee/spec/requests/api/graphql/mutations/incident_management/oncall_schedule/destroy_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Removing an on-call schedule' do
+  include GraphqlHelpers
+
+  let_it_be(:user) { create(:user) }
+  let_it_be(:project) { create(:project) }
+  let_it_be(:oncall_schedule) { create(:incident_management_oncall_schedule, project: project) }
+  let(:variables) { { project_path: project.full_path, iid: oncall_schedule.iid.to_s } }
+
+  let(:mutation) do
+    graphql_mutation(:oncall_schedule_destroy, variables) do
+      <<~QL
+        clientMutationId
+        errors
+        oncallSchedule {
+          iid
+          name
+          description
+          timezone
+        }
+      QL
+    end
+  end
+
+  let(:mutation_response) { graphql_mutation_response(:oncall_schedule_destroy) }
+
+  before do
+    stub_licensed_features(oncall_schedules: true)
+    project.add_maintainer(user)
+  end
+
+  it 'removes the on-call schedule' do
+    post_graphql_mutation(mutation, current_user: user)
+
+    oncall_schedule_response = mutation_response['oncallSchedule']
+
+    expect(response).to have_gitlab_http_status(:success)
+    expect(oncall_schedule_response.slice(*%w[iid name description timezone])).to eq(
+      'iid' => oncall_schedule.iid.to_s,
+      'name' => oncall_schedule.name,
+      'description' => oncall_schedule.description,
+      'timezone' => oncall_schedule.timezone
+    )
+
+    expect { oncall_schedule.reload }.to raise_error ActiveRecord::RecordNotFound
+  end
+end

ee/spec/services/incident_management/oncall_schedules/destroy_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe IncidentManagement::OncallSchedules::DestroyService do
+  let_it_be(:user_with_permissions) { create(:user) }
+  let_it_be(:user_without_permissions) { create(:user) }
+  let_it_be_with_refind(:project) { create(:project) }
+
+  let!(:oncall_schedule) { create(:incident_management_oncall_schedule, project: project) }
+  let(:current_user) { user_with_permissions }
+  let(:params) { {} }
+  let(:service) { described_class.new(oncall_schedule, current_user) }
+
+  before do
+    stub_licensed_features(oncall_schedules: true)
+    project.add_maintainer(user_with_permissions)
+  end
+
+  describe '#execute' do
+    shared_examples 'error response' do |message|
+      it 'has an informative message' do
+        expect(execute).to be_error
+        expect(execute.message).to eq(message)
+      end
+    end
+
+    subject(:execute) { service.execute }
+
+    context 'when the current_user is anonymous' do
+      let(:current_user) { nil }
+
+      it_behaves_like 'error response', 'You have insufficient permissions to remove an on-call schedule from this project'
+    end
+
+    context 'when the current_user does not have permissions to remove on-call schedules' do
+      let(:current_user) { user_without_permissions }
+
+      it_behaves_like 'error response', 'You have insufficient permissions to remove an on-call schedule from this project'
+    end
+
+    context 'when feature is not available' do
+      before do
+        stub_licensed_features(oncall_schedules: false)
+      end
+
+      it_behaves_like 'error response', 'Your license does not support on-call schedules'
+    end
+
+    context 'when feature flag is disabled' do
+      before do
+        stub_feature_flags(oncall_schedules_mvc: false)
+      end
+
+      it_behaves_like 'error response', 'Your license does not support on-call schedules'
+    end
+
+    context 'when an error occurs during removal' do
+      before do
+        allow(oncall_schedule).to receive(:destroy).and_return(false)
+        oncall_schedule.errors.add(:name, 'cannot be removed')
+      end
+
+      it_behaves_like 'error response', 'Name cannot be removed'
+    end
+
+    it 'successfully returns the integration' do
+      expect(execute).to be_success
+
+      oncall_schedule_result = execute.payload[:oncall_schedule]
+      expect(oncall_schedule_result).to be_a(::IncidentManagement::OncallSchedule)
+      expect(oncall_schedule_result.name).to eq(oncall_schedule.name)
+      expect(oncall_schedule_result.description).to eq(oncall_schedule.description)
+      expect(oncall_schedule_result.timezone).to eq(oncall_schedule.timezone)
+    end
+  end
+end

locale/gitlab.pot

@@ -31242,6 +31242,9 @@ msgstr ""
 msgid "You have insufficient permissions to create an on-call schedule for this project"
 msgstr ""
 
+msgid "You have insufficient permissions to remove an on-call schedule from this project"
+msgstr ""
+
 msgid "You have insufficient permissions to remove this HTTP integration"
 msgstr ""