Add mutation to update limit metric settings on board lists

Also update schema and docs.

doc/api/graphql/reference/gitlab_schema.graphql

@@ -411,6 +411,56 @@ type BoardListEdge {
   node: BoardList
 }
 
+"""
+Autogenerated input type of BoardListUpdateLimitMetrics
+"""
+input BoardListUpdateLimitMetricsInput {
+  """
+  A unique identifier for the client performing the mutation.
+  """
+  clientMutationId: String
+
+  """
+  The new limit metric type for the list.
+  """
+  limitMetric: ListLimitMetric
+
+  """
+  The global ID of the list.
+  """
+  listId: ID!
+
+  """
+  The new maximum issue count limit.
+  """
+  maxIssueCount: Int
+
+  """
+  The new maximum issue weight limit.
+  """
+  maxIssueWeight: Int
+}
+
+"""
+Autogenerated return type of BoardListUpdateLimitMetrics
+"""
+type BoardListUpdateLimitMetricsPayload {
+  """
+  A unique identifier for the client performing the mutation.
+  """
+  clientMutationId: String
+
+  """
+  Reasons why the mutation failed.
+  """
+  errors: [String!]!
+
+  """
+  The updated list
+  """
+  list: BoardList
+}
+
 type Commit {
   """
   Author of the commit
@@ -5689,6 +5739,7 @@ enum MoveType {
 type Mutation {
   addAwardEmoji(input: AddAwardEmojiInput!): AddAwardEmojiPayload
   adminSidekiqQueuesDeleteJobs(input: AdminSidekiqQueuesDeleteJobsInput!): AdminSidekiqQueuesDeleteJobsPayload
+  boardListUpdateLimitMetrics(input: BoardListUpdateLimitMetricsInput!): BoardListUpdateLimitMetricsPayload
   createDiffNote(input: CreateDiffNoteInput!): CreateDiffNotePayload
   createEpic(input: CreateEpicInput!): CreateEpicPayload
   createImageDiffNote(input: CreateImageDiffNoteInput!): CreateImageDiffNotePayload

doc/api/graphql/reference/gitlab_schema.json

@@ -1262,6 +1262,138 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "INPUT_OBJECT",
+          "name": "BoardListUpdateLimitMetricsInput",
+          "description": "Autogenerated input type of BoardListUpdateLimitMetrics",
+          "fields": null,
+          "inputFields": [
+            {
+              "name": "listId",
+              "description": "The global ID of the list.",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "ID",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "limitMetric",
+              "description": "The new limit metric type for the list.",
+              "type": {
+                "kind": "ENUM",
+                "name": "ListLimitMetric",
+                "ofType": null
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "maxIssueCount",
+              "description": "The new maximum issue count limit.",
+              "type": {
+                "kind": "SCALAR",
+                "name": "Int",
+                "ofType": null
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "maxIssueWeight",
+              "description": "The new maximum issue weight limit.",
+              "type": {
+                "kind": "SCALAR",
+                "name": "Int",
+                "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": "BoardListUpdateLimitMetricsPayload",
+          "description": "Autogenerated return type of BoardListUpdateLimitMetrics",
+          "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": "Reasons why the mutation failed.",
+              "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": "list",
+              "description": "The updated list",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "BoardList",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "inputFields": null,
+          "interfaces": [
+
+          ],
+          "enumValues": null,
+          "possibleTypes": null
+        },
         {
           "kind": "SCALAR",
           "name": "Boolean",
@@ -16352,6 +16484,33 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "boardListUpdateLimitMetrics",
+              "description": null,
+              "args": [
+                {
+                  "name": "input",
+                  "description": null,
+                  "type": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "INPUT_OBJECT",
+                      "name": "BoardListUpdateLimitMetricsInput",
+                      "ofType": null
+                    }
+                  },
+                  "defaultValue": null
+                }
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "BoardListUpdateLimitMetricsPayload",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "createDiffNote",
               "description": null,

doc/api/graphql/reference/index.md

@@ -97,6 +97,16 @@ Represents a list for an issue board
 | `position` | Int | Position of list within the board |
 | `title` | String! | Title of the list |
 
+## BoardListUpdateLimitMetricsPayload
+
+Autogenerated return type of BoardListUpdateLimitMetrics
+
+| Name  | Type  | Description |
+| ---   |  ---- | ----------  |
+| `clientMutationId` | String | A unique identifier for the client performing the mutation. |
+| `errors` | String! => Array | Reasons why the mutation failed. |
+| `list` | BoardList | The updated list |
+
 ## Commit
 
 | Name  | Type  | Description |

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

@@ -17,6 +17,7 @@ module EE
         mount_mutation ::Mutations::Requirements::Create
         mount_mutation ::Mutations::Requirements::Update
         mount_mutation ::Mutations::Vulnerabilities::Dismiss
+        mount_mutation ::Mutations::Boards::Lists::UpdateLimitMetrics
       end
     end
   end

ee/app/graphql/mutations/boards/lists/update_limit_metrics.rb

+# frozen_string_literal: true
+
+module Mutations
+  module Boards
+    module Lists
+      class UpdateLimitMetrics < ::Mutations::BaseMutation
+        graphql_name 'BoardListUpdateLimitMetrics'
+
+        argument :list_id,
+                 GraphQL::ID_TYPE,
+                 required: true,
+                 description: 'The global ID of the list.'
+
+        argument :limit_metric,
+                 EE::Types::ListLimitMetricEnum,
+                 required: false,
+                 description: 'The new limit metric type for the list.'
+
+        argument :max_issue_count,
+                 GraphQL::INT_TYPE,
+                 required: false,
+                 description: 'The new maximum issue count limit.'
+
+        argument :max_issue_weight,
+                 GraphQL::INT_TYPE,
+                 required: false,
+                 description: 'The new maximum issue weight limit.'
+
+        field :list,
+              ::Types::BoardListType,
+              null: true,
+              description: 'The updated list'
+
+        def ready?(**args)
+          if limit_metric_settings_of(args).blank?
+            raise Gitlab::Graphql::Errors::ArgumentError,
+                  'At least one of the arguments limitMetric, maxIssueCount or maxIssueWeight is required'
+          end
+
+          super
+        end
+
+        def resolve(**args)
+          find_list_by_args!(args)
+
+          update_result = update_list(args)
+
+          {
+            list: update_result[:list],
+            errors: list.errors.full_messages
+          }
+        end
+
+        private
+
+        attr_reader :list
+
+        def find_list_by_args!(args)
+          @list ||= find_list_by_global_id(args[:list_id])
+
+          raise_resource_not_available_error! unless list
+
+          authorize_admin_rights!
+        end
+
+        def update_list(args)
+          service = ::Boards::Lists::UpdateService.new(board, current_user, limit_metric_settings_of(args))
+          service.execute(list)
+        end
+
+        def authorize_admin_rights!
+          raise_resource_not_available_error! unless Ability.allowed?(current_user, :admin_list, board)
+        end
+
+        def find_list_by_global_id(gid)
+          parsed_gid = GlobalID.parse(gid)
+          id = parsed_gid.model_id.to_i if list_accessible?(parsed_gid)
+          return unless id
+
+          List.find_by_id(id)
+        end
+
+        def list_accessible?(gid)
+          gid.app == GlobalID.app && list?(gid)
+        end
+
+        def list?(gid)
+          model_class = gid&.model_class
+          return unless model_class
+
+          model_class <= List
+        end
+
+        def board
+          @board ||= list.board
+        end
+
+        def limit_metric_settings_of(args)
+          args.slice(:limit_metric, :max_issue_count, :max_issue_weight)
+        end
+      end
+    end
+  end
+end

ee/changelogs/unreleased/209260-add-limit-metric-mutation-pd.yml

+---
+title: Add GraphQL mutation to update limit metric settings on board lists
+merge_request: 29897
+author:
+type: added

ee/spec/graphql/mutations/boards/lists/update_limit_metrics_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Mutations::Boards::Lists::UpdateLimitMetrics do
+  let_it_be(:group) { create(:group, :private) }
+  let_it_be(:board) { create(:board, group: group) }
+  let_it_be(:user)  { create(:user) }
+  let_it_be(:guest) { create(:user) }
+  let_it_be(:list)  { create(:list, board: board) }
+
+  let(:current_user) { user }
+  let(:mutation) { described_class.new(object: nil, context: { current_user: current_user }, field: nil) }
+  let(:list_update_params) { { limit_metric: :all_metrics, max_issue_count: 10, max_issue_weight: 50 } }
+
+  before_all do
+    group.add_maintainer(user)
+    group.add_guest(guest)
+  end
+
+  subject { mutation.resolve(list_id: list.to_global_id.to_s, **list_update_params) }
+
+  describe '#ready?' do
+    it 'raises an error if required arguments are missing' do
+      expect { mutation.ready?({ list_id: 'some id' }) }.to raise_error(Gitlab::Graphql::Errors::ArgumentError, "At least one of the arguments " \
+        "limitMetric, maxIssueCount or maxIssueWeight is required")
+    end
+  end
+
+  describe '#resolve' do
+    context 'with admin rights' do
+      it 'updates the list as expected' do
+        subject
+
+        reloaded_list = list.reload
+
+        expect(reloaded_list.limit_metric).to eq('all_metrics')
+        expect(reloaded_list.max_issue_count).to eq(10)
+        expect(reloaded_list.max_issue_weight).to eq(50)
+      end
+    end
+
+    context 'without admin rights' do
+      let(:current_user) { guest }
+
+      it 'fails' do
+        expect { subject }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+      end
+    end
+  end
+end

ee/spec/requests/api/graphql/mutations/boards/lists/update_limit_metrics_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'Update list limit metrics' do
+  include GraphqlHelpers
+
+  let_it_be(:group) { create(:group, :private) }
+  let_it_be(:board) { create(:board, group: group) }
+  let_it_be(:user)  { create(:user) }
+  let_it_be(:list)  { create(:list, board: board) }
+
+  let(:mutation_class) { Mutations::Boards::Lists::UpdateLimitMetrics }
+  let(:mutation_name) { mutation_class.graphql_name }
+  let(:mutation_result_identifier) { mutation_name.camelize(:lower) }
+
+  before_all do
+    group.add_maintainer(user)
+  end
+
+  it 'returns an error if the user is not allowed to update the issue' do
+    post_graphql_mutation(mutation('all_metrics'), current_user: create(:user))
+
+    expect(graphql_errors).to include(a_hash_including('message' => "The resource that you are attempting to access does " \
+     "not exist or you don't have permission to perform this action"))
+  end
+
+  it 'returns an error if the list cannot be found' do
+    list_gid = ::URI::GID.parse("gid://#{GlobalID.app}/List/0")
+
+    post_graphql_mutation(mutation('all_metrics', list_id: list_gid), current_user: create(:user))
+
+    expect(graphql_errors).to include(a_hash_including('message' => "The resource that you are attempting to access does " \
+     "not exist or you don't have permission to perform this action"))
+  end
+
+  it 'returns an error if the gid identifies another object' do
+    post_graphql_mutation(mutation('all_metrics', list_id: user.to_global_id.to_s), current_user: create(:user))
+
+    expect(graphql_errors).to include(a_hash_including('message' => "The resource that you are attempting to access does " \
+     "not exist or you don't have permission to perform this action"))
+  end
+
+  %w[all_metrics issue_count issue_weights].each do |metric|
+    it "updates the list limit metrics for limit metric #{metric}" do
+      post_graphql_mutation(mutation(metric), current_user: user)
+
+      expect(response).to have_gitlab_http_status(:success)
+
+      response_list = json_response['data'][mutation_result_identifier]['list']
+      expect(response_list['id']).to eq(list.to_global_id.to_s)
+      expect(response_list['limitMetric']).to eq(metric.to_s)
+      expect(response_list['maxIssueCount']).to eq(3)
+      expect(response_list['maxIssueWeight']).to eq(42)
+
+      expect_list_update(list, metric: metric, count: 3, weight: 42)
+    end
+  end
+
+  def list_update_params(metric)
+    {
+      list_id: list.to_global_id.to_s,
+      limit_metric: metric,
+      max_issue_count: 3,
+      max_issue_weight: 42
+    }
+  end
+
+  def mutation(metric, additional_params = {})
+    graphql_mutation(mutation_name, list_update_params(metric).merge(additional_params),
+                     <<-QL.strip_heredoc
+                       clientMutationId
+                       list {
+                         id, maxIssueCount, maxIssueWeight, limitMetric
+                       }
+                       errors
+    QL
+    )
+  end
+
+  def expect_list_update(list, metric:, count:, weight:)
+    reloaded_list = list.reload
+
+    expect(reloaded_list.limit_metric).to eq(metric)
+    expect(reloaded_list.max_issue_count).to eq(count)
+    expect(reloaded_list.max_issue_weight).to eq(weight)
+  end
+end