Add support for bulk update labels

- Change label dropdown partial to accept a group parent
- Modify labels helper to accept a group parent in dropdown data
- Add labels block to group bulk update sidebar template
- Add specs for labels helper

app/models/issue.rb

@@ -43,6 +43,7 @@ class Issue < ApplicationRecord
   validates :project, presence: true
 
   alias_attribute :parent_ids, :project_id
+  alias_method :issuing_parent, :project
 
   scope :in_projects, ->(project_ids) { where(project_id: project_ids) }
 

app/models/merge_request.rb

@@ -194,6 +194,7 @@ class MergeRequest < ApplicationRecord
   alias_attribute :project, :target_project
   alias_attribute :project_id, :target_project_id
   alias_attribute :auto_merge_enabled, :merge_when_pipeline_succeeds
+  alias_method :issuing_parent, :target_project
 
   def self.reference_prefix
     '!'

app/services/issuable/bulk_update_service.rb

@@ -29,7 +29,7 @@ module Issuable
       items.each do |issuable|
         next unless can?(current_user, :"update_#{type}", issuable)
 
-        update_class.new(issuable.project, current_user, params).execute(issuable)
+        update_class.new(issuable.issuing_parent, current_user, params).execute(issuable)
       end
 
       {

app/views/groups/issues.html.haml

-- @can_bulk_update = can?(current_user, :admin_issue, @group)
+- @can_bulk_update = can?(current_user, :admin_issue, @group) && @group.feature_available?(:group_bulk_edit)
 
 - page_title "Issues"
 = content_for :meta_tags do

app/views/groups/merge_requests.html.haml

-- @can_bulk_update = can?(current_user, :admin_merge_request, @group)
+- @can_bulk_update = can?(current_user, :admin_merge_request, @group) && @group.feature_available?(:group_bulk_edit)
 
 - page_title "Merge Requests"
 

app/views/shared/issuable/_label_dropdown.html.haml

 - project = @target_project || @project
+- edit_context = local_assigns.fetch(:edit_context, nil) || project
 - show_create = local_assigns.fetch(:show_create, true)
 - extra_options = local_assigns.fetch(:extra_options, true)
 - filter_submit = local_assigns.fetch(:filter_submit, true)
@@ -8,7 +9,7 @@
 - classes = local_assigns.fetch(:classes, [])
 - selected = local_assigns.fetch(:selected, nil)
 - dropdown_title = local_assigns.fetch(:dropdown_title, "Filter by label")
-- dropdown_data = label_dropdown_data(@project, labels: labels_filter_path_with_defaults, default_label: "Labels")
+- dropdown_data = label_dropdown_data(edit_context, labels: labels_filter_path_with_defaults(only_group_labels: edit_context.is_a?(Group)), default_label: "Labels")
 - dropdown_data.merge!(data_options)
 - label_name = local_assigns.fetch(:label_name, "Labels")
 - no_default_styles = local_assigns.fetch(:no_default_styles, false)

doc/user/group/bulk_editing/index.md

-# Bulk editing issue and merge request milestones **(PREMIUM)**
+# Bulk editing issues, merge requests, and epics at the group level **(PREMIUM)**
 
-> - [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/7249) for issues in
-  [GitLab Premium](https://about.gitlab.com/pricing/) 12.1.
-> - [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/12719) for merge
-  requests in GitLab [GitLab Premium](https://about.gitlab.com/pricing/) 12.2.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/7249) for issues in [GitLab Premium](https://about.gitlab.com/pricing/) 12.1.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/12719) for merge requests in [GitLab Premium](https://about.gitlab.com/pricing/) 12.2.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/7250) for epics in [GitLab Premium](https://about.gitlab.com/pricing/) 12.2.
 
-Milestones can be updated simultaneously across multiple issues or merge requests by using the bulk editing feature.
+## Editing milestones and labels
 
-![Bulk editing](img/bulk-editing.png)
+> **Notes:**
+>
+> - A permission level of `Reporter` or higher is required in order to manage issues.
+> - A permission level of `Developer` or higher is required in order to manage merge requests.
+> - A permission level of `Reporter` or higher is required in order to manage epics.
+
+By using the bulk editing feature:
 
-NOTE: **Note:**
-A permission level of `Reporter` or higher is required in order to manage issues, and
-a permission level of `Developer` or higher is required in order to manage merge requests.
+- Milestones can be updated simultaneously across multiple issues or merge requests.
+- Labels can be updated simultaneously across multiple issues, merge requests, or epics.
+
+![Bulk editing](img/bulk-editing.png)
 
-To bulk update group issue or merge request milestones:
+To bulk update group issues, merge requests, or epics:
 
-1. Navigate to the issues or merge requests list.
-1. Click the **Edit issues** or **Edit merge requests** button.
-   - This will open a sidebar on the right-hand side of your screen where an editable field
-     for milestones will be displayed.
-   - Checkboxes will also appear beside each issue or merge request.
-1. Check the checkbox beside each issue to be edited.
-1. Select the desired milestone from the sidebar.
+1. Navigate to the issues, merge requests, or epics list.
+1. Click **Edit issues**, **Edit merge requests**, or **Edit epics**.
+    - This will open a sidebar on the right-hand side where editable fields
+      for milestones and labels will be displayed.
+    - Checkboxes will also appear beside each issue, merge request, or epic.
+1. Check the checkbox beside each issue, merge request, or epic to be edited.
+1. Select the desired new values from the sidebar.
 1. Click **Update all**.

doc/user/group/epics/index.md

@@ -97,6 +97,22 @@ have a [start or due date](#start-date-and-due-date), then you can see a
 
 Drag and drop to reorder issues and child epics. New issues and child epics added to an epic appear at the top of the list.
 
+## Updating epics
+
+### Using bulk editing
+
+To apply labels across multiple epics:
+
+1. Go to the Epics list.
+1. Click **Edit epics**.
+    - Checkboxes will appear beside each epic.
+    - A sidebar on the right-hand side will appear, with an editable field for labels.
+1. Check the checkbox beside each epic to be edited.
+1. Select the desired labels.
+1. Click **Update all**.
+
+![bulk editing](img/bulk_editing.png)
+
 ## Deleting an epic
 
 NOTE: **Note:**

ee/app/assets/javascripts/pages/groups/epics/index/index.js

 import initFilteredSearch from '~/pages/search/init_filtered_search';
+import issuableInitBulkUpdateSidebar from '~/issuable_init_bulk_update_sidebar';
 import FilteredSearchTokenKeysEpics from 'ee/filtered_search/filtered_search_token_keys_epics';
 import initEpicCreateApp from 'ee/epic/epic_bundle';
 
+const EPIC_BULK_UPDATE_PREFIX = 'epic_';
+
 document.addEventListener('DOMContentLoaded', () => {
   initFilteredSearch({
     page: 'epics',
@@ -12,4 +15,6 @@ document.addEventListener('DOMContentLoaded', () => {
   });
 
   initEpicCreateApp(true);
+
+  issuableInitBulkUpdateSidebar.init(EPIC_BULK_UPDATE_PREFIX);
 });

ee/app/controllers/groups/epics_controller.rb

@@ -9,10 +9,11 @@ class Groups::EpicsController < Groups::ApplicationController
   include EpicsActions
 
   before_action :check_epics_available!
-  before_action :epic, except: [:index, :create]
+  before_action :epic, except: [:index, :create, :bulk_update]
   before_action :set_issuables_index, only: :index
   before_action :authorize_update_issuable!, only: :update
   before_action :authorize_create_epic!, only: [:create]
+  before_action :verify_group_bulk_edit_enabled!, only: [:bulk_update]
 
   before_action do
     push_frontend_feature_flag(:epic_trees, @group)
@@ -109,4 +110,8 @@ class Groups::EpicsController < Groups::ApplicationController
   def authorize_create_epic!
     return render_404 unless can?(current_user, :create_epic, group)
   end
+
+  def verify_group_bulk_edit_enabled!
+    render_404 unless group.feature_available?(:group_bulk_edit)
+  end
 end

ee/app/helpers/ee/labels_helper.rb

@@ -30,11 +30,21 @@ module EE
       tooltip
     end
 
-    def label_dropdown_data(project, opts = {})
-      super.merge({
-        scoped_labels: project&.feature_available?(:scoped_labels)&.to_s,
+    def label_dropdown_data(edit_context, opts = {})
+      scoped_labels_fields = {
+        scoped_labels: edit_context&.feature_available?(:scoped_labels)&.to_s,
         scoped_labels_documentation_link: help_page_path('user/project/labels.md', anchor: 'scoped-labels')
-      })
+      }
+
+      return super.merge(scoped_labels_fields) unless edit_context.is_a?(Group)
+
+      {
+        toggle: "dropdown",
+        field_name: opts[:field_name] || "label_name[]",
+        show_no: "true",
+        show_any: "true",
+        group_id: edit_context&.try(:id)
+      }.merge(scoped_labels_fields, opts)
     end
 
     def sidebar_label_dropdown_data(issuable_type, issuable_sidebar)

ee/app/models/ee/epic.rb

@@ -46,6 +46,7 @@ module EE
       validate :validate_parent, on: :create
 
       alias_attribute :parent_ids, :parent_id
+      alias_method :issuing_parent, :group
 
       scope :in_parents, -> (parent_ids) { where(parent_id: parent_ids) }
       scope :inc_group, -> { includes(:group) }

ee/app/services/epics/update_service.rb

@@ -12,7 +12,7 @@ module Epics
     def execute(epic)
       # start_date and end_date columns are no longer writable by users because those
       # are composite fields managed by the system.
-      params.except!(:start_date, :end_date)
+      params.extract!(:start_date, :end_date)
 
       update_task_event(epic) || update(epic)
 

ee/app/views/groups/epics/_epic.html.haml

-%li
+%li{ id: dom_id(epic), data: { labels: epic.label_ids, id: epic.id } }
   .issue-box
+    - if @can_bulk_update
+      .issue-check.hidden
+        = check_box_tag dom_id(epic, "selected"), nil, false, 'data-id' => epic.id, class: "selected-issuable"
     .issuable-info-container
       .issuable-main-info
         .issue-title.title

ee/app/views/groups/epics/index.html.haml

+- @can_bulk_update = can?(current_user, :admin_epic, @group) && @group.feature_available?(:group_bulk_edit)
+
 - page_title "Epics"
 
 .top-area
   = render 'shared/issuable/epic_nav', type: :epics
   .nav-controls
+    - if @can_bulk_update
+      = render_if_exists 'shared/issuable/bulk_update_button', type: :epics
     - if can?(current_user, :create_epic, @group)
       #epic-create-root{ data: { endpoint: request.url, 'align-right' => true } }
 
 = render 'shared/epic/search_bar', type: :epics
 
+- if @can_bulk_update
+  = render_if_exists 'shared/issuable/group_bulk_update_sidebar', group: @group, type: :epics
+
 - if @epics.to_a.any?
   = render 'shared/epics'
 - else

ee/app/views/shared/epic/_search_bar.html.haml

@@ -25,6 +25,9 @@
     = form_tag page_filter_path, method: :get, class: 'flex-fill filter-form js-filter-form' do
       - if params[:search].present?
         = hidden_field_tag :search, params[:search]
+      - if @can_bulk_update
+        .check-all-holder.d-none.d-sm-block.hidden
+          = check_box_tag "check-all-issues", nil, false, class: "check-all-issues left"
       .epics-other-filters.filtered-search-wrapper.d-flex.flex-column.flex-md-row
         .filtered-search-box
           = dropdown_tag(custom_icon('icon_history'),

ee/app/views/shared/issuable/_group_bulk_update_sidebar.html.haml

@@ -8,11 +8,17 @@
         .filter-item.inline.update-issues-btn.float-left
           = button_tag _('Update all'), class: "btn update-selected-issues btn-info", disabled: true
         = button_tag _('Cancel'), class: "btn btn-default js-bulk-update-menu-hide float-right"
+      - unless type == :epics
+        .block
+          .title
+            = _('Milestone')
+          .filter-item
+            = dropdown_tag(_('Select milestone'), options: { title: _('Assign milestone'), toggle_class: 'js-milestone-select js-extra-options js-filter-submit js-filter-bulk-update', filter: true, dropdown_class: 'dropdown-menu-selectable dropdown-menu-milestone', placeholder: _('Search milestones'), data: { show_no: true, field_name: 'update[milestone_id]', milestones: milestones_filter_path(only_group_milestones: true, format: :json), use_id: true, default_label: _('Milestone') } })
       .block
         .title
-          = _('Milestone')
-        .filter-item
-          = dropdown_tag(_('Select milestone'), options: { title: _('Assign milestone'), toggle_class: 'js-milestone-select js-extra-options js-filter-submit js-filter-bulk-update', filter: true, dropdown_class: 'dropdown-menu-selectable dropdown-menu-milestone', placeholder: _('Search milestones'), data: { show_no: true, field_name: 'update[milestone_id]', milestones: milestones_filter_path(only_group_milestones: true, format: :json), use_id: true, default_label: _('Milestone') } })
+          = _('Labels')
+        .filter-item.labels-filter
+          = render "shared/issuable/label_dropdown", classes: ["js-filter-bulk-update", "js-multiselect"], dropdown_title: _('Apply a label'), show_create: false, show_footer: false, extra_options: false, filter_submit: false, data_options: { persist_when_hide: "true", field_name: "update[label_ids][]", show_no: false, show_any: false, use_id: true, default_label: "Labels" }, label_name: _('Select labels'), no_default_styles: true, edit_context: group
 
       = hidden_field_tag 'update[issuable_ids]', []
       = hidden_field_tag :state_event, params[:state_event]

ee/changelogs/unreleased/7250-group-bulk-edit-issues-mrs-epics-change-label.yml

+---
+title: Support for bulk editing labels at a group level
+merge_request: 14827
+author:
+type: added

ee/config/routes/group.rb

@@ -83,6 +83,10 @@ constraints(::Constraints::GroupUrlConstrainer.new) do
       scope module: :epics do
         resources :notes, only: [:index, :create, :destroy, :update], concerns: :awardable, constraints: { id: /\d+/ }
       end
+
+      collection do
+        post :bulk_update
+      end
     end
 
     resources :issues, only: [] do

ee/spec/controllers/groups/epics_controller_spec.rb

@@ -472,5 +472,67 @@ describe Groups::EpicsController do
         expect(controller).to set_flash[:notice].to(/The epic was successfully deleted\./)
       end
     end
+
+    describe 'POST #bulk_update' do
+      context 'with correct params' do
+        subject { post :bulk_update, params: params, format: :json }
+
+        let(:label1) { create(:group_label, group: group)}
+        let(:label2) { create(:group_label, group: group)}
+        let(:epics)  { create_list(:epic, 2, group: group, labels: [label1]) }
+        let(:params) do
+          {
+            update: {
+              add_label_ids: [label2],
+              issuable_ids: "#{epics[0].id}, #{epics[1].id}",
+              remove_label_ids: [label1]
+            },
+            group_id: group
+          }
+        end
+
+        before do
+          sign_in(user)
+          group.add_reporter(user)
+        end
+
+        context 'when group bulk edit feature is disabled' do
+          before do
+            stub_licensed_features(group_bulk_edit: false, epics: true)
+            group.add_reporter(user)
+          end
+
+          it 'returns status 404' do
+            subject
+
+            expect(response.status).to eq(404)
+          end
+
+          it 'does not update merge requests milestone' do
+            subject
+
+            epics.each { |epic| expect(epic.reload.labels).to eq([label1])}
+          end
+        end
+
+        context 'when group bulk edit feature is enabled' do
+          before do
+            stub_licensed_features(group_bulk_edit: true, epics: true)
+          end
+
+          it 'returns status 200' do
+            subject
+
+            expect(response.status).to eq(200)
+          end
+
+          it 'updates epics labels' do
+            subject
+
+            epics.each {|epic| expect(epic.reload.labels).to eq([label2]) }
+          end
+        end
+      end
+    end
   end
 end

ee/spec/helpers/ee/labels_helper_spec.rb

@@ -32,4 +32,46 @@ describe LabelsHelper do
       end
     end
   end
+
+  describe '#label_dropdown_data' do
+    subject { label_dropdown_data(edit_context, opts) }
+
+    let(:opts) { { default_label: "Labels" } }
+    let(:data) do
+      {
+        toggle: "dropdown",
+        field_name: opts[:field_name] || "label_name[]",
+        show_no: "true",
+        show_any: "true",
+        default_label: "Labels",
+        scoped_labels: "false",
+        scoped_labels_documentation_link: "/help/user/project/labels.md#scoped-labels"
+      }
+    end
+
+    context 'when edit_context is a project' do
+      let(:edit_context) { create(:project) }
+      let(:label) { create(:label, project: edit_context, title: 'bug') }
+      before do
+        data.merge!({
+          project_id: edit_context.id,
+          namespace_path: edit_context.namespace.full_path,
+          project_path: edit_context.path
+        })
+      end
+
+      it { is_expected.to eq(data) }
+    end
+
+    context 'when edit_context is a group' do
+      let(:edit_context) { create(:group) }
+      let(:label) { create(:group_label, group: edit_context, title: 'bug') }
+
+      before do
+        data.merge!(group_id: edit_context.id)
+      end
+
+      it { is_expected.to eq(data) }
+    end
+  end
 end

ee/spec/routing/group_routing_spec.rb

@@ -96,4 +96,12 @@ describe 'Group routing', "routing" do
       expect(post('/groups/gitlabhq/-/merge_requests/bulk_update')).to route_to('groups/merge_requests#bulk_update', group_id: 'gitlabhq')
     end
   end
+
+  describe 'epics' do
+    it 'routes post to #bulk_update' do
+      allow(Group).to receive(:find_by_full_path).with('gitlabhq', any_args).and_return(true)
+
+      expect(post('/groups/gitlabhq/-/epics/bulk_update')).to route_to('groups/epics#bulk_update', group_id: 'gitlabhq')
+    end
+  end
 end

ee/spec/services/ee/issuable/bulk_update_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Issuable::BulkUpdateService do
+  let(:user)  { create(:user) }
+  let(:group) { create(:group) }
+
+  context 'with epics' do
+    subject { described_class.new(user, params).execute('epic') }
+
+    let(:epic1) { create(:epic, group: group, labels: [label1]) }
+    let(:epic2) { create(:epic, group: group, labels: [label1]) }
+    let(:label1) { create(:group_label, group: group) }
+
+    describe 'updating labels' do
+      let(:label2) { create(:group_label, group: group, title: 'Bug') }
+      let(:label3) { create(:group_label, group: group, title: 'suggestion') }
+
+      let(:issuables) { [epic1, epic2] }
+      let(:params) do
+        {
+          issuable_ids: issuables.map(&:id).join(','),
+          add_label_ids: [label2.id, label3.id],
+          remove_label_ids: [label1.id]
+        }
+      end
+
+      context 'when epics are disabled' do
+        before do
+          group.add_reporter(user)
+          stub_licensed_features(epics: false)
+        end
+
+        it 'does not update labels' do
+          issuables.each do |issuable|
+            expect { subject }.not_to change { issuable.labels }
+          end
+        end
+      end
+
+      context 'when epics are enabled' do
+        before do
+          group.add_reporter(user)
+          stub_licensed_features(epics: true)
+        end
+
+        it 'updates epic labels' do
+          result = subject
+
+          expect(result[:success]).to be_truthy
+          expect(result[:count]).to eq(issuables.count)
+
+          issuables.each do |issuable|
+            expect(issuable.reload.labels).to eq([label2, label3])
+          end
+        end
+      end
+    end
+  end
+end

locale/gitlab.pot

@@ -1579,6 +1579,9 @@ msgstr ""
 msgid "Applied"
 msgstr ""
 
+msgid "Apply a label"
+msgstr ""
+
 msgid "Apply suggestion"
 msgstr ""
 
@@ -12870,6 +12873,9 @@ msgstr ""
 msgid "Select group or project"
 msgstr ""
 
+msgid "Select labels"
+msgstr ""
+
 msgid "Select members to invite"
 msgstr ""