Allow users to apply group labels on Issues/MRs

app/controllers/dashboard/labels_controller.rb

 class Dashboard::LabelsController < Dashboard::ApplicationController
   def index
-    labels = Label.where(project_id: projects).select(:id, :title, :color).uniq(:title)
+    labels = LabelsFinder.new(current_user, project_id: projects)
+                         .execute
+                         .select(:id, :title, :color)
+                         .uniq(:title)
 
     respond_to do |format|
       format.json { render json: labels }

app/controllers/projects/issues_controller.rb

@@ -25,8 +25,7 @@ class Projects::IssuesController < Projects::ApplicationController
   def index
     @issues = issues_collection
     @issues = @issues.page(params[:page])
-
-    @labels = @project.labels.where(title: params[:label_name])
+    @labels = LabelsFinder.new(current_user, project_id: @project.id, title: params[:label_name]).execute if params[:label_name].presence
 
     respond_to do |format|
       format.html
@@ -46,10 +45,14 @@ class Projects::IssuesController < Projects::ApplicationController
     )
 
     @issue  = @noteable = @project.issues.new(issue_params)
+    @labels = LabelsFinder.new(current_user, project_id: @project.id).execute
+
     respond_with(@issue)
   end
 
   def edit
+    @labels = LabelsFinder.new(current_user, project_id: @project.id).execute
+
     respond_with(@issue)
   end
 

app/controllers/projects/labels_controller.rb

@@ -17,7 +17,7 @@ class Projects::LabelsController < Projects::ApplicationController
     respond_to do |format|
       format.html
       format.json do
-        render json: @project.labels
+        render json: LabelsFinder.new(current_user, project_id: @project.id).execute
       end
     end
   end

app/controllers/projects/merge_requests_controller.rb

@@ -40,7 +40,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     @merge_requests = @merge_requests.page(params[:page])
     @merge_requests = @merge_requests.preload(:target_project)
 
-    @labels = @project.labels.where(title: params[:label_name])
+    @labels = LabelsFinder.new(current_user, project_id: @project.id, title: params[:label_name]).execute if params[:label_name].presence
 
     respond_to do |format|
       format.html
@@ -263,6 +263,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     @source_project = @merge_request.source_project
     @target_project = @merge_request.target_project
     @target_branches = @merge_request.target_project.repository.branch_names
+    @labels = LabelsFinder.new(current_user, project_id: @project.id).execute
   end
 
   def update
@@ -575,6 +576,8 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     @note_counts = Note.where(commit_id: @commits.map(&:id)).
       group(:commit_id).count
 
+    @labels = LabelsFinder.new(current_user, project_id: @project.id).execute
+
     define_pipelines_vars
   end
 

app/finders/issuable_finder.rb

@@ -274,8 +274,10 @@ class IssuableFinder
         items = items.without_label
       else
         items = items.with_label(label_names, params[:sort])
+
         if projects
-          items = items.where(labels: { project_id: projects })
+          label_ids = LabelsFinder.new(current_user, project_id: projects).execute.select(:id)
+          items = items.where(labels: { id: label_ids })
         end
       end
     end

app/models/label.rb

@@ -23,7 +23,7 @@ class Label < ActiveRecord::Base
   has_many :merge_requests, through: :label_links, source: :target, source_type: 'MergeRequest'
 
   validates :color, color: true, allow_blank: false
-  validates :project, presence: true, unless: Proc.new { |service| service.template? }
+  validates :project, presence: true, if: :project_label?
 
   # Don't allow ',' for label titles
   validates :title,
@@ -127,6 +127,10 @@ class Label < ActiveRecord::Base
 
   private
 
+  def project_label?
+    type.blank? && !template?
+  end
+
   def label_format_reference(format = :id)
     raise StandardError, 'Unknown format' unless [:id, :name].include?(format)
 

app/services/issuable_base_service.rb

@@ -80,17 +80,18 @@ class IssuableBaseService < BaseService
   def filter_labels_in_param(key)
     return if params[key].to_a.empty?
 
-    params[key] = project.labels.where(id: params[key]).pluck(:id)
+    params[key] = available_labels.where(id: params[key]).pluck(:id)
   end
 
   def find_or_create_label_ids
     labels = params.delete(:labels)
     return unless labels
 
-    params[:label_ids] = labels.split(",").map do |label_name|
-      project.labels.create_with(color: Label::DEFAULT_COLOR)
-                    .find_or_create_by(title: label_name.strip)
-                    .id
+    params[:label_ids] = labels.split(',').map do |label_name|
+      label = available_labels.find_by(title: title).select(:id)
+      label ||= project.labels.create(title: label_name.strip, color: Label::DEFAULT_COLOR)
+
+      label.id
     end
   end
 
@@ -111,6 +112,10 @@ class IssuableBaseService < BaseService
     new_label_ids
   end
 
+  def available_labels
+    LabelsFinder.new(current_user, project_id: @project.id).execute
+  end
+
   def merge_slash_commands_into_params!(issuable)
     description, command_params =
       SlashCommands::InterpretService.new(project, current_user).

app/services/projects/autocomplete_service.rb

@@ -13,7 +13,7 @@ module Projects
     end
 
     def labels
-      @project.labels.select([:title, :color])
+      LabelsFinder.new(current_user, project_id: project.id).execute.select([:title, :color])
     end
 
     def commands(noteable, type)

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

@@ -77,11 +77,10 @@
           = hidden_field_tag :state_event, params[:state_event]
           .filter-item.inline
             = button_tag "Update #{type.to_s.humanize(capitalize: false)}", class: "btn update_selected_issues btn-save"
-
-  - if !@labels.nil?
-    .row-content-block.second-block.filtered-labels{ class: ("hidden" if !@labels.any?) }
-      - if @labels.any?
-        = render "shared/labels_row", labels: @labels
+  - has_labels = @labels && @labels.any?
+  .row-content-block.second-block.filtered-labels{ class: ("hidden" unless has_labels) }
+    - if has_labels
+      = render 'shared/labels_row', labels: @labels
 
 :javascript
   new UsersSelect();

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

@@ -95,7 +95,7 @@
           .issuable-form-select-holder
             = render "shared/issuable/milestone_dropdown", selected: issuable.milestone, name: "#{issuable.class.model_name.param_key}[milestone_id]", show_any: false, show_menu_above: true, show_upcoming: false, extra_class: "js-issuable-form-dropdown js-dropdown-keep-input", dropdown_title: "Select milestone"
       .form-group
-        - has_labels = issuable.project.labels.any?
+        - has_labels = @labels && @labels.any?
         = f.label :label_ids, "Labels", class: "control-label #{"col-lg-4" if has_due_date}"
         = f.hidden_field :label_ids, multiple: true, value: ''
         .col-sm-10{ class: "#{"col-lg-8" if has_due_date} #{'issuable-form-padding-top' if !has_labels}" }

spec/services/issues/create_service_spec.rb

@@ -67,6 +67,27 @@ describe Issues::CreateService, services: true do
         expect(Todo.where(attributes).count).to eq 1
       end
 
+      context 'when label belongs to project group' do
+        let(:group) { create(:group) }
+        let(:group_labels) { create_pair(:group_label, group: group) }
+
+        let(:opts) do
+          {
+            title: 'Title',
+            description: 'Description',
+            label_ids: group_labels.map(&:id)
+          }
+        end
+
+        before do
+          project.update(group: group)
+        end
+
+        it 'assigns group labels' do
+          expect(issue.labels).to match_array group_labels
+        end
+      end
+
       context 'when label belongs to different project' do
         let(:label) { create(:label) }