CE port for bulk updating group labels

- Original EE MR: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14827

11 files changed, 215 insertions, 173 deletions

diff --git a/app/models/issue.rb b/app/models/issue.rb
index 164858dc432..bc5ec94081b 100644
--- a/app/models/issue.rb
+++ b/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) }
 
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index 5e8a6a7d5e5..4c4883fc022 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -192,6 +192,7 @@ 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
     '!'
diff --git a/app/services/issuable/bulk_update_service.rb b/app/services/issuable/bulk_update_service.rb
index 6d215d7a3b9..273a12f386a 100644
--- a/app/services/issuable/bulk_update_service.rb
+++ b/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
 
       {
diff --git a/app/views/groups/issues.html.haml b/app/views/groups/issues.html.haml
index 2163446425c..bf077eb09d2 100644
--- a/app/views/groups/issues.html.haml
+++ b/app/views/groups/issues.html.haml
@@ -1,4 +1,4 @@
-- @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
diff --git a/app/views/groups/merge_requests.html.haml b/app/views/groups/merge_requests.html.haml
index b5a2bab4799..0780fab513b 100644
--- a/app/views/groups/merge_requests.html.haml
+++ b/app/views/groups/merge_requests.html.haml
@@ -1,4 +1,4 @@
-- @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"
 
diff --git a/app/views/shared/issuable/_label_dropdown.html.haml b/app/views/shared/issuable/_label_dropdown.html.haml
index 483652852b6..bca5db16bd3 100644
--- a/app/views/shared/issuable/_label_dropdown.html.haml
+++ b/app/views/shared/issuable/_label_dropdown.html.haml
@@ -1,4 +1,5 @@
 - 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)
diff --git a/doc/user/group/bulk_editing/img/bulk-editing.png b/doc/user/group/bulk_editing/img/bulk-editing.png
index 8e2bd265054..ca1662a781b 100644
--- a/doc/user/group/bulk_editing/img/bulk-editing.png
+++ b/doc/user/group/bulk_editing/img/bulk-editing.png
diff --git a/doc/user/group/bulk_editing/index.md b/doc/user/group/bulk_editing/index.md
index c8715577eb2..ea48b0b9fef 100644
--- a/doc/user/group/bulk_editing/index.md
+++ b/doc/user/group/bulk_editing/index.md
@@ -1,25 +1,31 @@
-# 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**.
diff --git a/doc/user/group/epics/img/bulk_editing.png b/doc/user/group/epics/img/bulk_editing.png
new file mode 100644
index 00000000000..85610bef83e
--- /dev/null
+++ b/doc/user/group/epics/img/bulk_editing.png
diff --git a/doc/user/group/epics/index.md b/doc/user/group/epics/index.md
index 4ab562b655f..5968b91c9b7 100644
--- a/doc/user/group/epics/index.md
+++ b/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:**
diff --git a/spec/services/issuable/bulk_update_service_spec.rb b/spec/services/issuable/bulk_update_service_spec.rb
index fb12877fa05..e3a728f2566 100644
--- a/spec/services/issuable/bulk_update_service_spec.rb
+++ b/spec/services/issuable/bulk_update_service_spec.rb
@@ -31,7 +31,159 @@ describe Issuable::BulkUpdateService do
     end
   end
 
-  context 'with project issuables' do
+  shared_examples 'updating labels' do
+    def create_issue_with_labels(labels)
+      create(:labeled_issue, project: project, labels: labels)
+    end
+
+    let(:issue_all_labels) { create_issue_with_labels([bug, regression, merge_requests]) }
+    let(:issue_bug_and_regression) { create_issue_with_labels([bug, regression]) }
+    let(:issue_bug_and_merge_requests) { create_issue_with_labels([bug, merge_requests]) }
+    let(:issue_no_labels) { create(:issue, project: project) }
+    let(:issues) { [issue_all_labels, issue_bug_and_regression, issue_bug_and_merge_requests, issue_no_labels] }
+
+    let(:labels) { [] }
+    let(:add_labels) { [] }
+    let(:remove_labels) { [] }
+
+    let(:bulk_update_params) do
+      {
+        label_ids:        labels.map(&:id),
+        add_label_ids:    add_labels.map(&:id),
+        remove_label_ids: remove_labels.map(&:id)
+      }
+    end
+
+    before do
+      bulk_update(issues, bulk_update_params)
+    end
+
+    context 'when label_ids are passed' do
+      let(:issues) { [issue_all_labels, issue_no_labels] }
+      let(:labels) { [bug, regression] }
+
+      it 'updates the labels of all issues passed to the labels passed' do
+        expect(issues.map(&:reload).map(&:label_ids)).to all(match_array(labels.map(&:id)))
+      end
+
+      it 'does not update issues not passed in' do
+        expect(issue_bug_and_regression.label_ids).to contain_exactly(bug.id, regression.id)
+      end
+
+      context 'when those label IDs are empty' do
+        let(:labels) { [] }
+
+        it 'updates the issues passed to have no labels' do
+          expect(issues.map(&:reload).map(&:label_ids)).to all(be_empty)
+        end
+      end
+    end
+
+    context 'when add_label_ids are passed' do
+      let(:issues) { [issue_all_labels, issue_bug_and_merge_requests, issue_no_labels] }
+      let(:add_labels) { [bug, regression, merge_requests] }
+
+      it 'adds those label IDs to all issues passed' do
+        expect(issues.map(&:reload).map(&:label_ids)).to all(include(*add_labels.map(&:id)))
+      end
+
+      it 'does not update issues not passed in' do
+        expect(issue_bug_and_regression.label_ids).to contain_exactly(bug.id, regression.id)
+      end
+    end
+
+    context 'when remove_label_ids are passed' do
+      let(:issues) { [issue_all_labels, issue_bug_and_merge_requests, issue_no_labels] }
+      let(:remove_labels) { [bug, regression, merge_requests] }
+
+      it 'removes those label IDs from all issues passed' do
+        expect(issues.map(&:reload).map(&:label_ids)).to all(be_empty)
+      end
+
+      it 'does not update issues not passed in' do
+        expect(issue_bug_and_regression.label_ids).to contain_exactly(bug.id, regression.id)
+      end
+    end
+
+    context 'when add_label_ids and remove_label_ids are passed' do
+      let(:issues) { [issue_all_labels, issue_bug_and_merge_requests, issue_no_labels] }
+      let(:add_labels) { [bug] }
+      let(:remove_labels) { [merge_requests] }
+
+      it 'adds the label IDs to all issues passed' do
+        expect(issues.map(&:reload).map(&:label_ids)).to all(include(bug.id))
+      end
+
+      it 'removes the label IDs from all issues passed' do
+        expect(issues.map(&:reload).flat_map(&:label_ids)).not_to include(merge_requests.id)
+      end
+
+      it 'does not update issues not passed in' do
+        expect(issue_bug_and_regression.label_ids).to contain_exactly(bug.id, regression.id)
+      end
+    end
+
+    context 'when add_label_ids and label_ids are passed' do
+      let(:issues) { [issue_all_labels, issue_bug_and_regression, issue_bug_and_merge_requests] }
+      let(:labels) { [merge_requests] }
+      let(:add_labels) { [regression] }
+
+      it 'adds the label IDs to all issues passed' do
+        expect(issues.map(&:reload).map(&:label_ids)).to all(include(regression.id))
+      end
+
+      it 'ignores the label IDs parameter' do
+        expect(issues.map(&:reload).map(&:label_ids)).to all(include(bug.id))
+      end
+
+      it 'does not update issues not passed in' do
+        expect(issue_no_labels.label_ids).to be_empty
+      end
+    end
+
+    context 'when remove_label_ids and label_ids are passed' do
+      let(:issues) { [issue_no_labels, issue_bug_and_regression] }
+      let(:labels) { [merge_requests] }
+      let(:remove_labels) { [regression] }
+
+      it 'removes the label IDs from all issues passed' do
+        expect(issues.map(&:reload).flat_map(&:label_ids)).not_to include(regression.id)
+      end
+
+      it 'ignores the label IDs parameter' do
+        expect(issues.map(&:reload).flat_map(&:label_ids)).not_to include(merge_requests.id)
+      end
+
+      it 'does not update issues not passed in' do
+        expect(issue_all_labels.label_ids).to contain_exactly(bug.id, regression.id, merge_requests.id)
+      end
+    end
+
+    context 'when add_label_ids, remove_label_ids, and label_ids are passed' do
+      let(:issues) { [issue_bug_and_merge_requests, issue_no_labels] }
+      let(:labels) { [regression] }
+      let(:add_labels) { [bug] }
+      let(:remove_labels) { [merge_requests] }
+
+      it 'adds the label IDs to all issues passed' do
+        expect(issues.map(&:reload).map(&:label_ids)).to all(include(bug.id))
+      end
+
+      it 'removes the label IDs from all issues passed' do
+        expect(issues.map(&:reload).flat_map(&:label_ids)).not_to include(merge_requests.id)
+      end
+
+      it 'ignores the label IDs parameter' do
+        expect(issues.map(&:reload).flat_map(&:label_ids)).not_to include(regression.id)
+      end
+
+      it 'does not update issues not passed in' do
+        expect(issue_bug_and_regression.label_ids).to contain_exactly(bug.id, regression.id)
+      end
+    end
+  end
+
+  context 'with issuables at a project level' do
     describe 'close issues' do
       let(:issues) { create_list(:issue, 2, project: project) }
 
@@ -178,159 +330,11 @@ describe Issuable::BulkUpdateService do
     end
 
     describe 'updating labels' do
-      def create_issue_with_labels(labels)
-        create(:labeled_issue, project: project, labels: labels)
-      end
-
       let(:bug) { create(:label, project: project) }
       let(:regression) { create(:label, project: project) }
       let(:merge_requests) { create(:label, project: project) }
 
-      let(:issue_all_labels) { create_issue_with_labels([bug, regression, merge_requests]) }
-      let(:issue_bug_and_regression) { create_issue_with_labels([bug, regression]) }
-      let(:issue_bug_and_merge_requests) { create_issue_with_labels([bug, merge_requests]) }
-      let(:issue_no_labels) { create(:issue, project: project) }
-      let(:issues) { [issue_all_labels, issue_bug_and_regression, issue_bug_and_merge_requests, issue_no_labels] }
-
-      let(:labels) { [] }
-      let(:add_labels) { [] }
-      let(:remove_labels) { [] }
-
-      let(:bulk_update_params) do
-        {
-          label_ids:        labels.map(&:id),
-          add_label_ids:    add_labels.map(&:id),
-          remove_label_ids: remove_labels.map(&:id)
-        }
-      end
-
-      before do
-        bulk_update(issues, bulk_update_params)
-      end
-
-      context 'when label_ids are passed' do
-        let(:issues) { [issue_all_labels, issue_no_labels] }
-        let(:labels) { [bug, regression] }
-
-        it 'updates the labels of all issues passed to the labels passed' do
-          expect(issues.map(&:reload).map(&:label_ids)).to all(match_array(labels.map(&:id)))
-        end
-
-        it 'does not update issues not passed in' do
-          expect(issue_bug_and_regression.label_ids).to contain_exactly(bug.id, regression.id)
-        end
-
-        context 'when those label IDs are empty' do
-          let(:labels) { [] }
-
-          it 'updates the issues passed to have no labels' do
-            expect(issues.map(&:reload).map(&:label_ids)).to all(be_empty)
-          end
-        end
-      end
-
-      context 'when add_label_ids are passed' do
-        let(:issues) { [issue_all_labels, issue_bug_and_merge_requests, issue_no_labels] }
-        let(:add_labels) { [bug, regression, merge_requests] }
-
-        it 'adds those label IDs to all issues passed' do
-          expect(issues.map(&:reload).map(&:label_ids)).to all(include(*add_labels.map(&:id)))
-        end
-
-        it 'does not update issues not passed in' do
-          expect(issue_bug_and_regression.label_ids).to contain_exactly(bug.id, regression.id)
-        end
-      end
-
-      context 'when remove_label_ids are passed' do
-        let(:issues) { [issue_all_labels, issue_bug_and_merge_requests, issue_no_labels] }
-        let(:remove_labels) { [bug, regression, merge_requests] }
-
-        it 'removes those label IDs from all issues passed' do
-          expect(issues.map(&:reload).map(&:label_ids)).to all(be_empty)
-        end
-
-        it 'does not update issues not passed in' do
-          expect(issue_bug_and_regression.label_ids).to contain_exactly(bug.id, regression.id)
-        end
-      end
-
-      context 'when add_label_ids and remove_label_ids are passed' do
-        let(:issues) { [issue_all_labels, issue_bug_and_merge_requests, issue_no_labels] }
-        let(:add_labels) { [bug] }
-        let(:remove_labels) { [merge_requests] }
-
-        it 'adds the label IDs to all issues passed' do
-          expect(issues.map(&:reload).map(&:label_ids)).to all(include(bug.id))
-        end
-
-        it 'removes the label IDs from all issues passed' do
-          expect(issues.map(&:reload).flat_map(&:label_ids)).not_to include(merge_requests.id)
-        end
-
-        it 'does not update issues not passed in' do
-          expect(issue_bug_and_regression.label_ids).to contain_exactly(bug.id, regression.id)
-        end
-      end
-
-      context 'when add_label_ids and label_ids are passed' do
-        let(:issues) { [issue_all_labels, issue_bug_and_regression, issue_bug_and_merge_requests] }
-        let(:labels) { [merge_requests] }
-        let(:add_labels) { [regression] }
-
-        it 'adds the label IDs to all issues passed' do
-          expect(issues.map(&:reload).map(&:label_ids)).to all(include(regression.id))
-        end
-
-        it 'ignores the label IDs parameter' do
-          expect(issues.map(&:reload).map(&:label_ids)).to all(include(bug.id))
-        end
-
-        it 'does not update issues not passed in' do
-          expect(issue_no_labels.label_ids).to be_empty
-        end
-      end
-
-      context 'when remove_label_ids and label_ids are passed' do
-        let(:issues) { [issue_no_labels, issue_bug_and_regression] }
-        let(:labels) { [merge_requests] }
-        let(:remove_labels) { [regression] }
-
-        it 'removes the label IDs from all issues passed' do
-          expect(issues.map(&:reload).flat_map(&:label_ids)).not_to include(regression.id)
-        end
-
-        it 'ignores the label IDs parameter' do
-          expect(issues.map(&:reload).flat_map(&:label_ids)).not_to include(merge_requests.id)
-        end
-
-        it 'does not update issues not passed in' do
-          expect(issue_all_labels.label_ids).to contain_exactly(bug.id, regression.id, merge_requests.id)
-        end
-      end
-
-      context 'when add_label_ids, remove_label_ids, and label_ids are passed' do
-        let(:issues) { [issue_bug_and_merge_requests, issue_no_labels] }
-        let(:labels) { [regression] }
-        let(:add_labels) { [bug] }
-        let(:remove_labels) { [merge_requests] }
-
-        it 'adds the label IDs to all issues passed' do
-          expect(issues.map(&:reload).map(&:label_ids)).to all(include(bug.id))
-        end
-
-        it 'removes the label IDs from all issues passed' do
-          expect(issues.map(&:reload).flat_map(&:label_ids)).not_to include(merge_requests.id)
-        end
-
-        it 'ignores the label IDs parameter' do
-          expect(issues.map(&:reload).flat_map(&:label_ids)).not_to include(regression.id)
-        end
-
-        it 'does not update issues not passed in' do
-          expect(issue_bug_and_regression.label_ids).to contain_exactly(bug.id, regression.id)
-        end
-      end
+      it_behaves_like 'updating labels'
     end
 
     describe 'subscribe to issues' do
@@ -360,7 +364,7 @@ describe Issuable::BulkUpdateService do
     end
   end
 
-  context 'with group issuables ' do
+  context 'with issuables at a group level' do
     let(:group) { create(:group) }
 
     describe 'updating milestones' do
@@ -387,5 +391,18 @@ describe Issuable::BulkUpdateService do
         it_behaves_like 'updates milestones'
       end
     end
+
+    describe 'updating labels' do
+      let(:project)        { create(:project, :repository, group: group) }
+      let(:bug)            { create(:group_label, group: group) }
+      let(:regression)     { create(:group_label, group: group) }
+      let(:merge_requests) { create(:group_label, group: group) }
+
+      before do
+        group.add_reporter(user)
+      end
+
+      it_behaves_like 'updating labels'
+    end
   end
 end