Allow users to subscribe to group labels at project-level

app/controllers/projects/labels_controller.rb

@@ -3,7 +3,7 @@ class Projects::LabelsController < Projects::ApplicationController
 
   before_action :module_enabled
   before_action :label, only: [:edit, :update, :destroy]
-  before_action :find_labels, only: [:index, :set_priorities, :remove_priority]
+  before_action :find_labels, only: [:index, :set_priorities, :remove_priority, :toggle_subscription]
   before_action :authorize_read_label!
   before_action :authorize_admin_labels!, only: [:new, :create, :edit, :update,
                                                  :generate, :destroy, :remove_priority,
@@ -123,7 +123,10 @@ class Projects::LabelsController < Projects::ApplicationController
   def label
     @label ||= @project.labels.find(params[:id])
   end
-  alias_method :subscribable_resource, :label
+
+  def subscribable_resource
+    @available_labels.find(params[:id])
+  end
 
   def subscribable_project
     @project

app/helpers/labels_helper.rb

@@ -68,11 +68,9 @@ module LabelsHelper
     end
   end
 
-  def toggle_subscription_data(label)
-    return unless label.is_a?(ProjectLabel)
-
+  def toggle_subscription_data(label, project)
     {
-      url: toggle_subscription_namespace_project_label_path(label.project.namespace, label.project, label)
+      url: toggle_subscription_namespace_project_label_path(project.namespace, project, label)
     }
   end
 
@@ -149,17 +147,11 @@ module LabelsHelper
   end
 
   def label_subscription_status(label, project)
-    case label
-    when GroupLabel then 'Subscribing to group labels is currently not supported.'
-    when ProjectLabel then label.subscribed?(current_user, project) ? 'subscribed' : 'unsubscribed'
-    end
+    label.subscribed?(current_user, project) ? 'subscribed' : 'unsubscribed'
   end
 
   def label_subscription_toggle_button_text(label, project)
-    case label
-    when GroupLabel then 'Subscribing to group labels is currently not supported.'
-    when ProjectLabel then label.subscribed?(current_user, project) ? 'Unsubscribe' : 'Subscribe'
-    end
+    label.subscribed?(current_user, project) ? 'Unsubscribe' : 'Subscribe'
   end
 
   def label_deletion_confirm_text(label)

app/views/shared/_label.html.haml

@@ -18,8 +18,8 @@
         %li
           = link_to_label(label, subject: subject) do
             = pluralize open_issues_count, 'open issue'
-        - if current_user
-          %li.label-subscription{ data: toggle_subscription_data(label) }
+        - if current_user && defined?(@project)
+          %li.label-subscription{ data: toggle_subscription_data(label, @project) }
             %a.js-subscribe-button.label-subscribe-button.subscription-status{ role: "button", href: "#", data: { toggle: "tooltip", status: label_subscription_status(label, @project) } }
               %span= label_subscription_toggle_button_text(label, @project)
         - if can?(current_user, :admin_label, label)
@@ -34,11 +34,11 @@
     = link_to_label(label, subject: subject, css_class: 'btn btn-transparent btn-action') do
       = pluralize open_issues_count, 'open issue'
 
-    - if current_user
-      .label-subscription.inline{ data: toggle_subscription_data(label) }
+    - if current_user && defined?(@project)
+      .label-subscription.inline{ data: toggle_subscription_data(label, @project) }
         %button.js-subscribe-button.label-subscribe-button.btn.btn-transparent.btn-action.subscription-status{ type: "button", title: label_subscription_toggle_button_text(label, @project), data: { toggle: "tooltip", status: label_subscription_status(label, @project) } }
           %span.sr-only= label_subscription_toggle_button_text(label, @project)
-          = icon('eye', class: 'label-subscribe-button-icon', disabled: label.is_a?(GroupLabel))
+          = icon('eye', class: 'label-subscribe-button-icon')
           = icon('spinner spin', class: 'label-subscribe-button-loading')
 
     - if can?(current_user, :admin_label, label)
@@ -49,6 +49,6 @@
         %span.sr-only Delete
         = icon('trash-o')
 
-  - if current_user && label.is_a?(ProjectLabel)
+  - if current_user && defined?(@project)
     :javascript
       new Subscription('##{dom_id(label)} .label-subscription');

spec/controllers/projects/labels_controller_spec.rb

@@ -72,14 +72,8 @@ describe Projects::LabelsController do
   end
 
   describe 'POST #generate' do
-    let(:admin) { create(:admin) }
-
-    before do
-      sign_in(admin)
-    end
-
     context 'personal project' do
-      let(:personal_project) { create(:empty_project) }
+      let(:personal_project) { create(:empty_project, namespace: user.namespace) }
 
       it 'creates labels' do
         post :generate, namespace_id: personal_project.namespace.to_param, project_id: personal_project.to_param
@@ -96,4 +90,22 @@ describe Projects::LabelsController do
       end
     end
   end
+
+  describe 'POST #toggle_subscription' do
+    it 'allows user to toggle subscription on project labels' do
+      label = create(:label, project: project)
+
+      post :toggle_subscription, namespace_id: project.namespace.to_param, project_id: project.to_param, id: label.id
+
+      expect(response).to have_http_status(200)
+    end
+
+    it 'allows user to toggle subscription on group labels' do
+      group_label = create(:group_label, group: group)
+
+      post :toggle_subscription, namespace_id: project.namespace.to_param, project_id: project.to_param, id: group_label.id
+
+      expect(response).to have_http_status(200)
+    end
+  end
 end