Add graphql API for creating labels

Allows creating project and group labels using graphql API.

app/graphql/mutations/boards/create.rb

@@ -3,8 +3,7 @@
 module Mutations
   module Boards
     class Create < ::Mutations::BaseMutation
-      include Mutations::ResolvesGroup
-      include ResolvesProject
+      include Mutations::ResolvesResourceParent
 
       graphql_name 'CreateBoard'
 
@@ -13,12 +12,6 @@ module Mutations
             null: true,
             description: 'The board after mutation.'
 
-      argument :project_path, GraphQL::ID_TYPE,
-               required: false,
-               description: 'The project full path the board is associated with.'
-      argument :group_path, GraphQL::ID_TYPE,
-               required: false,
-               description: 'The group full path the board is associated with.'
       argument :name,
                 GraphQL::STRING_TYPE,
                 required: false,
@@ -43,10 +36,7 @@ module Mutations
       authorize :admin_board
 
       def resolve(args)
-        group_path = args.delete(:group_path)
-        project_path = args.delete(:project_path)
-
-        board_parent = authorized_find!(group_path: group_path, project_path: project_path)
+        board_parent = authorized_resource_parent_find!(args)
         response = ::Boards::CreateService.new(board_parent, current_user, args).execute
 
         {
@@ -54,25 +44,6 @@ module Mutations
           errors: response.errors
         }
       end
-
-      def ready?(**args)
-        if args.values_at(:project_path, :group_path).compact.blank?
-          raise Gitlab::Graphql::Errors::ArgumentError,
-                'group_path or project_path arguments are required'
-        end
-
-        super
-      end
-
-      private
-
-      def find_object(group_path: nil, project_path: nil)
-        if group_path
-          resolve_group(full_path: group_path)
-        else
-          resolve_project(full_path: project_path)
-        end
-      end
     end
   end
 end

app/graphql/mutations/concerns/mutations/resolves_resource_parent.rb

+# frozen_string_literal: true
+
+module Mutations
+  module ResolvesResourceParent
+    extend ActiveSupport::Concern
+    include Mutations::ResolvesGroup
+    include ResolvesProject
+
+    included do
+      argument :project_path, GraphQL::ID_TYPE,
+               required: false,
+               description: 'The project full path the resource is associated with'
+
+      argument :group_path, GraphQL::ID_TYPE,
+               required: false,
+               description: 'The group full path the resource is associated with'
+    end
+
+    def ready?(**args)
+      unless args[:project_path].present? ^ args[:group_path].present?
+        raise Gitlab::Graphql::Errors::ArgumentError,
+              'Exactly one of group_path or project_path arguments is required'
+      end
+
+      super
+    end
+
+    private
+
+    def authorized_resource_parent_find!(args)
+      authorized_find!(project_path: args.delete(:project_path),
+                       group_path: args.delete(:group_path))
+    end
+
+    def find_object(project_path: nil, group_path: nil)
+      if group_path.present?
+        resolve_group(full_path: group_path)
+      else
+        resolve_project(full_path: project_path)
+      end
+    end
+  end
+end

app/graphql/mutations/labels/create.rb

+# frozen_string_literal: true
+
+module Mutations
+  module Labels
+    class Create < BaseMutation
+      include Mutations::ResolvesResourceParent
+
+      graphql_name 'LabelCreate'
+
+      field :label,
+            Types::LabelType,
+            null: true,
+            description: 'The label after mutation'
+
+      argument :title, GraphQL::STRING_TYPE,
+               required: true,
+               description: 'Title of the label'
+
+      argument :description, GraphQL::STRING_TYPE,
+               required: false,
+               description: 'Description of the label'
+
+      argument :color, GraphQL::STRING_TYPE,
+               required: false,
+               default_value: Label::DEFAULT_COLOR,
+               description: "The color of the label given in 6-digit hex notation with leading '#' sign (e.g. #FFAABB) or one of the CSS color names in https://developer.mozilla.org/en-US/docs/Web/CSS/color_value#Color_keywords"
+
+      authorize :admin_label
+
+      def resolve(args)
+        parent = authorized_resource_parent_find!(args)
+        parent_key = parent.is_a?(Project) ? :project : :group
+
+        label = ::Labels::CreateService.new(args).execute(parent_key => parent)
+
+        {
+          label: label.persisted? ? label : nil,
+          errors: errors_on_object(label)
+        }
+      end
+    end
+  end
+end

app/graphql/types/mutation_type.rb

@@ -39,6 +39,7 @@ module Types
     mount_mutation Mutations::Issues::SetSubscription
     mount_mutation Mutations::Issues::Update
     mount_mutation Mutations::Issues::Move
+    mount_mutation Mutations::Labels::Create
     mount_mutation Mutations::MergeRequests::Create
     mount_mutation Mutations::MergeRequests::Update
     mount_mutation Mutations::MergeRequests::SetLabels

changelogs/unreleased/graphql_create_label.yml

+---
+title: Added GraphQL mutation for creating project and group labels
+merge_request: 46534
+author:
+type: added

doc/api/graphql/reference/gitlab_schema.graphql

@@ -3499,7 +3499,7 @@ input CreateBoardInput {
   clientMutationId: String
 
   """
-  The group full path the board is associated with.
+  The group full path the resource is associated with
   """
   groupPath: ID
 
@@ -3519,7 +3519,7 @@ input CreateBoardInput {
   name: String
 
   """
-  The project full path the board is associated with.
+  The project full path the resource is associated with
   """
   projectPath: ID
 
@@ -11303,6 +11303,63 @@ type LabelConnection {
   pageInfo: PageInfo!
 }
 
+"""
+Autogenerated input type of LabelCreate
+"""
+input LabelCreateInput {
+  """
+  A unique identifier for the client performing the mutation.
+  """
+  clientMutationId: String
+
+  """
+  The color of the label given in 6-digit hex notation with leading '#' sign
+  (e.g. #FFAABB) or one of the CSS color names in
+  https://developer.mozilla.org/en-US/docs/Web/CSS/color_value#Color_keywords
+  """
+  color: String = "#428BCA"
+
+  """
+  Description of the label
+  """
+  description: String
+
+  """
+  The group full path the resource is associated with
+  """
+  groupPath: ID
+
+  """
+  The project full path the resource is associated with
+  """
+  projectPath: ID
+
+  """
+  Title of the label
+  """
+  title: String!
+}
+
+"""
+Autogenerated return type of LabelCreate
+"""
+type LabelCreatePayload {
+  """
+  A unique identifier for the client performing the mutation.
+  """
+  clientMutationId: String
+
+  """
+  Errors encountered during execution of the mutation.
+  """
+  errors: [String!]!
+
+  """
+  The label after mutation
+  """
+  label: Label
+}
+
 """
 An edge in a connection.
 """
@@ -13046,6 +13103,7 @@ type Mutation {
   issueSetWeight(input: IssueSetWeightInput!): IssueSetWeightPayload
   jiraImportStart(input: JiraImportStartInput!): JiraImportStartPayload
   jiraImportUsers(input: JiraImportUsersInput!): JiraImportUsersPayload
+  labelCreate(input: LabelCreateInput!): LabelCreatePayload
   markAsSpamSnippet(input: MarkAsSpamSnippetInput!): MarkAsSpamSnippetPayload
   mergeRequestCreate(input: MergeRequestCreateInput!): MergeRequestCreatePayload
   mergeRequestSetAssignees(input: MergeRequestSetAssigneesInput!): MergeRequestSetAssigneesPayload

doc/api/graphql/reference/gitlab_schema.json

@@ -9454,7 +9454,7 @@
           "inputFields": [
             {
               "name": "projectPath",
-              "description": "The project full path the board is associated with.",
+              "description": "The project full path the resource is associated with",
               "type": {
                 "kind": "SCALAR",
                 "name": "ID",
@@ -9464,7 +9464,7 @@
             },
             {
               "name": "groupPath",
-              "description": "The group full path the board is associated with.",
+              "description": "The group full path the resource is associated with",
               "type": {
                 "kind": "SCALAR",
                 "name": "ID",
@@ -30964,6 +30964,148 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "INPUT_OBJECT",
+          "name": "LabelCreateInput",
+          "description": "Autogenerated input type of LabelCreate",
+          "fields": null,
+          "inputFields": [
+            {
+              "name": "projectPath",
+              "description": "The project full path the resource is associated with",
+              "type": {
+                "kind": "SCALAR",
+                "name": "ID",
+                "ofType": null
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "groupPath",
+              "description": "The group full path the resource is associated with",
+              "type": {
+                "kind": "SCALAR",
+                "name": "ID",
+                "ofType": null
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "title",
+              "description": "Title of the label",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "description",
+              "description": "Description of the label",
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "color",
+              "description": "The color of the label given in 6-digit hex notation with leading '#' sign (e.g. #FFAABB) or one of the CSS color names in https://developer.mozilla.org/en-US/docs/Web/CSS/color_value#Color_keywords",
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "defaultValue": "\"#428BCA\""
+            },
+            {
+              "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": "LabelCreatePayload",
+          "description": "Autogenerated return type of LabelCreate",
+          "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": "label",
+              "description": "The label after mutation",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "Label",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "inputFields": null,
+          "interfaces": [
+
+          ],
+          "enumValues": null,
+          "possibleTypes": null
+        },
         {
           "kind": "OBJECT",
           "name": "LabelEdge",
@@ -37488,6 +37630,33 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "labelCreate",
+              "description": null,
+              "args": [
+                {
+                  "name": "input",
+                  "description": null,
+                  "type": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "INPUT_OBJECT",
+                      "name": "LabelCreateInput",
+                      "ofType": null
+                    }
+                  },
+                  "defaultValue": null
+                }
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "LabelCreatePayload",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "markAsSpamSnippet",
               "description": null,

doc/api/graphql/reference/index.md

@@ -1731,6 +1731,16 @@ Autogenerated return type of JiraImportUsers.
 | `textColor` | String! | Text color of the label |
 | `title` | String! | Content of the label |
 
+### LabelCreatePayload
+
+Autogenerated return type of LabelCreate.
+
+| Field | Type | Description |
+| ----- | ---- | ----------- |
+| `clientMutationId` | String | A unique identifier for the client performing the mutation. |
+| `errors` | String! => Array | Errors encountered during execution of the mutation. |
+| `label` | Label | The label after mutation |
+
 ### MarkAsSpamSnippetPayload
 
 Autogenerated return type of MarkAsSpamSnippet.

spec/graphql/mutations/labels/create_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::Labels::Create do
+  let_it_be(:user) { create(:user) }
+
+  let(:attributes) do
+    {
+      title: 'new title',
+      description: 'A new label'
+    }
+  end
+
+  let(:mutation) { described_class.new(object: nil, context: { current_user: user }, field: nil) }
+  let(:mutated_label) { subject[:label] }
+
+  shared_examples 'create labels mutation' do
+    describe '#resolve' do
+      subject { mutation.resolve(attributes.merge(extra_params)) }
+
+      context 'when the user does not have permission to create a label' do
+        before do
+          parent.add_guest(user)
+        end
+
+        it 'raises an error' do
+          expect { subject }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+        end
+      end
+
+      context 'when the user can create a label' do
+        before do
+          parent.add_developer(user)
+        end
+
+        it 'creates label with correct values' do
+          expect(mutated_label).to have_attributes(attributes)
+        end
+      end
+    end
+  end
+
+  specify { expect(described_class).to require_graphql_authorizations(:admin_label) }
+
+  context 'when creating a project label' do
+    let_it_be(:parent) { create(:project) }
+    let(:extra_params) { { project_path: parent.full_path } }
+
+    it_behaves_like 'create labels mutation'
+  end
+
+  context 'when creating a group label' do
+    let_it_be(:parent) { create(:group) }
+    let(:extra_params) { { group_path: parent.full_path } }
+
+    it_behaves_like 'create labels mutation'
+  end
+
+  describe '#ready?' do
+    subject { mutation.ready?(attributes.merge(extra_params)) }
+
+    context 'when passing both project_path and group_path' do
+      let(:extra_params) { { project_path: 'foo', group_path: 'bar' } }
+
+      it 'raises an argument error' do
+        expect { subject }
+          .to raise_error(Gitlab::Graphql::Errors::ArgumentError, /Exactly one of/)
+      end
+    end
+
+    context 'when passing only project_path or group_path' do
+      let(:extra_params) { { project_path: 'foo' } }
+
+      it 'does not raise an error' do
+        expect { subject }.not_to raise_error
+      end
+    end
+  end
+end

spec/requests/api/graphql/mutations/labels/create_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::Labels::Create do
+  include GraphqlHelpers
+
+  let_it_be(:current_user) { create(:user) }
+
+  let(:params) do
+    {
+      'title' => 'foo',
+      'description' => 'some description',
+      'color' => '#FF0000'
+    }
+  end
+
+  let(:mutation) { graphql_mutation(:label_create, params.merge(extra_params)) }
+
+  subject { post_graphql_mutation(mutation, current_user: current_user) }
+
+  def mutation_response
+    graphql_mutation_response(:label_create)
+  end
+
+  shared_examples_for 'labels create mutation' do
+    context 'when the user does not have permission to create a label' do
+      it_behaves_like 'a mutation that returns a top-level access error'
+
+      it 'does not create the label' do
+        expect { subject }.not_to change { Label.count }
+      end
+    end
+
+    context 'when the user has permission to create a label' do
+      before do
+        parent.add_developer(current_user)
+      end
+
+      context 'when the parent (project_path or group_path) param is given' do
+        it 'creates the label' do
+          expect { subject }.to change { Label.count }.to(1)
+
+          expect(mutation_response).to include(
+            'label' => a_hash_including(params))
+        end
+
+        it 'does not create a label when there are errors' do
+          label_factory = parent.is_a?(Group) ? :group_label : :label
+          create(label_factory, title: 'foo', parent.class.name.underscore.to_sym => parent)
+
+          expect { subject }.not_to change { Label.count }
+
+          expect(mutation_response).to have_key('label')
+          expect(mutation_response['label']).to be_nil
+          expect(mutation_response['errors'].first).to eq('Title has already been taken')
+        end
+      end
+    end
+  end
+
+  context 'when creating a project label' do
+    let_it_be(:parent) { create(:project) }
+    let(:extra_params) { { project_path: parent.full_path } }
+
+    it_behaves_like 'labels create mutation'
+  end
+
+  context 'when creating a group label' do
+    let_it_be(:parent) { create(:group) }
+    let(:extra_params) { { group_path: parent.full_path } }
+
+    it_behaves_like 'labels create mutation'
+  end
+
+  context 'when neither project_path nor group_path param is given' do
+    let(:mutation) { graphql_mutation(:label_create, params) }
+
+    it_behaves_like 'a mutation that returns top-level errors',
+      errors: ['Exactly one of group_path or project_path arguments is required']
+
+    it 'does not create the label' do
+      expect { subject }.not_to change { Label.count }
+    end
+  end
+end

spec/support/shared_examples/graphql/mutations/boards_create_shared_examples.rb

@@ -65,7 +65,7 @@ RSpec.shared_examples 'boards create mutation' do
       let(:params) { { name: name } }
 
       it_behaves_like 'a mutation that returns top-level errors',
-        errors: ['group_path or project_path arguments are required']
+        errors: ['Exactly one of group_path or project_path arguments is required']
 
       it 'does not create the board' do
         expect { subject }.not_to change { Board.count }