Add `Delete` button to label edit view

Allow users to delete labels from the edit view

Changelog: added

app/assets/javascripts/labels/components/delete_label_modal.vue

@@ -56,6 +56,7 @@ export default {
       </gl-sprintf>
     </template>
     <gl-sprintf
+      v-if="subjectName"
       :message="
         __(
           `%{strongStart}${labelName}%{strongEnd} will be permanently deleted from ${subjectName}. This cannot be undone.`,
@@ -66,6 +67,18 @@ export default {
         <strong>{{ content }}</strong>
       </template>
     </gl-sprintf>
+    <gl-sprintf
+      v-else
+      :message="
+        __(
+          `%{strongStart}${labelName}%{strongEnd} will be permanently deleted. This cannot be undone.`,
+        )
+      "
+    >
+      <template #strong="{ content }">
+        <strong>{{ content }}</strong>
+      </template>
+    </gl-sprintf>
     <template #modal-footer>
       <gl-button category="secondary" @click="closeModal">{{ __('Cancel') }}</gl-button>
       <gl-button

app/assets/javascripts/pages/admin/labels/edit/index.js

 import Labels from '~/labels/labels';
+import { initDeleteLabelModal } from '~/labels';
 
 new Labels(); // eslint-disable-line no-new
+initDeleteLabelModal();

app/assets/javascripts/pages/groups/labels/edit/index.js

 import Labels from 'ee_else_ce/labels/labels';
+import { initDeleteLabelModal } from '~/labels';
 
 // eslint-disable-next-line no-new
 new Labels();
+initDeleteLabelModal();

app/assets/javascripts/pages/projects/labels/edit/index.js

 import Labels from 'ee_else_ce/labels/labels';
+import { initDeleteLabelModal } from '~/labels';
 
 new Labels(); // eslint-disable-line no-new
+initDeleteLabelModal();

app/models/label.rb

@@ -260,7 +260,7 @@ class Label < ApplicationRecord
     attributes
   end
 
-  def present(attributes)
+  def present(attributes = {})
     super(**attributes.merge(presenter_class: ::LabelPresenter))
   end
 

app/presenters/label_presenter.rb

@@ -2,7 +2,7 @@
 
 class LabelPresenter < Gitlab::View::Presenter::Delegated
   presents ::Label, as: :label
-  delegate :name, :full_name, to: :label_subject, prefix: :subject
+  delegate :name, :full_name, to: :label_subject, prefix: :subject, allow_nil: true
 
   delegator_override :subject # TODO: Fix `Gitlab::View::Presenter::Delegated#subject` not to override `Label#subject`.
 
@@ -10,6 +10,7 @@ class LabelPresenter < Gitlab::View::Presenter::Delegated
     case label
     when GroupLabel then edit_group_label_path(label.group, label)
     when ProjectLabel then edit_project_label_path(label.project, label)
+    else edit_admin_label_path(label)
     end
   end
 
@@ -17,6 +18,7 @@ class LabelPresenter < Gitlab::View::Presenter::Delegated
     case label
     when GroupLabel then group_label_path(label.group, label)
     when ProjectLabel then project_label_path(label.project, label)
+    else admin_label_path(label)
     end
   end
 
@@ -43,7 +45,7 @@ class LabelPresenter < Gitlab::View::Presenter::Delegated
   end
 
   def label_subject
-    @label_subject ||= label.subject
+    @label_subject ||= label.subject if label.respond_to?(:subject)
   end
 
   private

app/views/shared/labels/_form.html.haml

@@ -26,9 +26,14 @@
         %br
         = _("Or you can choose one of the suggested colors below")
       = render_suggested_colors
-  .form-actions
+  .gl-display-flex.gl-justify-content-space-between.gl-p-5.gl-bg-gray-10.gl-border-t-solid.gl-border-t-gray-100.gl-border-t-1
+    %div
+      - if @label.persisted?
+        = f.submit _('Save changes'), class: 'btn gl-button btn-confirm js-save-button'
+      - else
+        = f.submit _('Create label'), class: 'btn gl-button btn-confirm js-save-button qa-label-create-button'
+      = link_to _('Cancel'), back_path, class: 'btn gl-button btn-default btn-cancel'
     - if @label.persisted?
-      = f.submit _('Save changes'), class: 'btn gl-button btn-confirm js-save-button'
-    - else
-      = f.submit _('Create label'), class: 'btn gl-button btn-confirm js-save-button qa-label-create-button'
-    = link_to _('Cancel'), back_path, class: 'btn gl-button btn-default btn-cancel'
+      - presented_label = @label.present
+      %button.btn.btn-danger.gl-button.btn-danger-secondary.js-delete-label-modal-button{ type: 'button', data: { label_name: presented_label.name, subject_name: presented_label.subject_name, destroy_path: presented_label.destroy_path } }
+        %span.gl-button-text= _('Delete')

doc/user/admin_area/labels.md

@@ -7,13 +7,12 @@ type: reference
 
 # Labels administration **(FREE SELF)**
 
-In the Admin Area, you can manage labels for the GitLab instance. For more details, see [Labels](../project/labels.md).
+To manage labels for the GitLab instance, select **Labels** (**{labels}**) from the Admin Area sidebar. For more details on how to manage labels, see [Labels](../project/labels.md).
 
-## Default Labels
+Labels created in the Admin Area are automatically added to new projects.
+Updating or adding labels in the Admin Area does not modify labels in existing projects.
 
-Labels created in the Admin Area become available to each _new_ project.
-
-![Default label set](img/admin_labels.png)
+![Default label set](img/admin_labels_v14_7.png)
 
 <!-- ## Troubleshooting
 

doc/user/project/labels.md

@@ -90,9 +90,10 @@ label section of the right sidebar of an issue or a merge request:
      color value for a specific color.
 1. Click **Create**.
 
-Once created, you can edit a label by clicking the pencil (**{pencil}**), or delete
-a label by clicking the three dots (**{ellipsis_v}**) next to the **Subscribe** button
-and selecting **Delete**.
+To edit a label after you create it, select (**{pencil}**).
+
+To delete a project label, select (**{ellipsis_v}**) next to the **Subscribe** button
+and select **Delete** or select **Delete** when you edit a label.
 
 WARNING:
 If you delete a label, it is permanently deleted. All references to the label are removed from the system and you cannot undo the deletion.

spec/factories/labels.rb

@@ -42,4 +42,6 @@ FactoryBot.define do
   factory :group_label, traits: [:base_label] do
     group
   end
+
+  factory :admin_label, traits: [:base_label], class: 'Label'
 end

spec/features/admin/admin_labels_spec.rb

@@ -3,6 +3,8 @@
 require 'spec_helper'
 
 RSpec.describe 'admin issues labels' do
+  include Spec::Support::Helpers::ModalHelpers
+
   let!(:bug_label) { Label.create!(title: 'bug', template: true) }
   let!(:feature_label) { Label.create!(title: 'feature', template: true) }
 
@@ -99,5 +101,19 @@ RSpec.describe 'admin issues labels' do
         expect(page).to have_content('fix')
       end
     end
+
+    it 'allows user to delete label', :js do
+      visit edit_admin_label_path(bug_label)
+
+      click_button 'Delete'
+
+      within_modal do
+        expect(page).to have_content("#{bug_label.title} will be permanently deleted. This cannot be undone.")
+
+        click_link 'Delete label'
+      end
+
+      expect(page).to have_content('Label was removed')
+    end
   end
 end

spec/features/groups/labels/edit_spec.rb

@@ -3,6 +3,8 @@
 require 'spec_helper'
 
 RSpec.describe 'Edit group label' do
+  include Spec::Support::Helpers::ModalHelpers
+
   let(:user)  { create(:user) }
   let(:group) { create(:group) }
   let(:label) { create(:group_label, group: group) }
@@ -20,4 +22,16 @@ RSpec.describe 'Edit group label' do
     expect(current_path).to eq(root_path)
     expect(label.reload.title).to eq('new label name')
   end
+
+  it 'allows user to delete label', :js do
+    click_button 'Delete'
+
+    within_modal do
+      expect(page).to have_content("#{label.title} will be permanently deleted from #{group.name}. This cannot be undone.")
+
+      click_link 'Delete label'
+    end
+
+    expect(page).to have_content("#{label.title} deleted permanently")
+  end
 end

spec/features/projects/labels/user_edits_labels_spec.rb

@@ -3,6 +3,8 @@
 require "spec_helper"
 
 RSpec.describe "User edits labels" do
+  include Spec::Support::Helpers::ModalHelpers
+
   let_it_be(:project) { create(:project_empty_repo, :public) }
   let_it_be(:label) { create(:label, project: project) }
   let_it_be(:user) { create(:user) }
@@ -24,4 +26,16 @@ RSpec.describe "User edits labels" do
       expect(page).to have_content(new_title).and have_no_content(label.title)
     end
   end
+
+  it 'allows user to delete label', :js do
+    click_button 'Delete'
+
+    within_modal do
+      expect(page).to have_content("#{label.title} will be permanently deleted from #{project.name}. This cannot be undone.")
+
+      click_link 'Delete label'
+    end
+
+    expect(page).to have_content('Label was removed')
+  end
 end

spec/frontend/labels/delete_label_modal_spec.js

@@ -13,6 +13,10 @@ describe('DeleteLabelModal', () => {
       subjectName: 'GitLab Org',
       destroyPath: `${TEST_HOST}/2`,
     },
+    {
+      labelName: 'admin label',
+      destroyPath: `${TEST_HOST}/3`,
+    },
   ];
 
   beforeEach(() => {
@@ -22,8 +26,12 @@ describe('DeleteLabelModal', () => {
       const button = document.createElement('button');
       button.setAttribute('class', 'js-delete-label-modal-button');
       button.setAttribute('data-label-name', x.labelName);
-      button.setAttribute('data-subject-name', x.subjectName);
       button.setAttribute('data-destroy-path', x.destroyPath);
+
+      if (x.subjectName) {
+        button.setAttribute('data-subject-name', x.subjectName);
+      }
+
       button.innerHTML = 'Action';
       buttonContainer.appendChild(button);
     });
@@ -62,6 +70,7 @@ describe('DeleteLabelModal', () => {
     index
     ${0}
     ${1}
+    ${2}
   `(`when multiple buttons exist`, ({ index }) => {
     beforeEach(() => {
       initDeleteLabelModal();
@@ -69,14 +78,22 @@ describe('DeleteLabelModal', () => {
     });
 
     it('correct props are passed to gl-modal', () => {
-      expect(findModal().querySelector('.modal-title').innerHTML).toContain(
-        buttons[index].labelName,
-      );
-      expect(findModal().querySelector('.modal-body').innerHTML).toContain(
-        buttons[index].subjectName,
-      );
+      const button = buttons[index];
+
+      expect(findModal().querySelector('.modal-title').innerHTML).toContain(button.labelName);
+
+      if (button.subjectName) {
+        expect(findModal().querySelector('.modal-body').textContent).toContain(
+          `${button.labelName} will be permanently deleted from ${button.subjectName}. This cannot be undone.`,
+        );
+      } else {
+        expect(findModal().querySelector('.modal-body').textContent).toContain(
+          `${button.labelName} will be permanently deleted. This cannot be undone.`,
+        );
+      }
+
       expect(findModal().querySelector('.modal-footer .btn-danger').href).toContain(
-        buttons[index].destroyPath,
+        button.destroyPath,
       );
     });
   });

spec/presenters/label_presenter_spec.rb

@@ -10,6 +10,7 @@ RSpec.describe LabelPresenter do
 
   let(:label) { build_stubbed(:label, project: project).present(issuable_subject: project) }
   let(:group_label) { build_stubbed(:group_label, group: group).present(issuable_subject: project) }
+  let(:admin_label) { build_stubbed(:admin_label).present(issuable_subject: nil) }
 
   describe '#edit_path' do
     context 'with group label' do
@@ -23,6 +24,12 @@ RSpec.describe LabelPresenter do
 
       it { is_expected.to eq(edit_project_label_path(project, label)) }
     end
+
+    context 'with an admin label' do
+      subject { admin_label.edit_path }
+
+      it { is_expected.to eq(edit_admin_label_path(admin_label)) }
+    end
   end
 
   describe '#destroy_path' do
@@ -37,6 +44,12 @@ RSpec.describe LabelPresenter do
 
       it { is_expected.to eq(project_label_path(project, label)) }
     end
+
+    context 'with an admin label' do
+      subject { admin_label.destroy_path }
+
+      it { is_expected.to eq(admin_label_path(admin_label)) }
+    end
   end
 
   describe '#filter_path' do
@@ -91,6 +104,12 @@ RSpec.describe LabelPresenter do
 
       it { is_expected.to eq(label.project.name) }
     end
+
+    context 'with an admin label' do
+      subject { admin_label.subject_name }
+
+      it { is_expected.to be_nil }
+    end
   end
 
   describe '#subject_full_name' do
@@ -105,5 +124,11 @@ RSpec.describe LabelPresenter do
 
       it { is_expected.to eq(label.project.full_name) }
     end
+
+    context 'with an admin label' do
+      subject { admin_label.subject_full_name }
+
+      it { is_expected.to be_nil }
+    end
   end
 end