Allow users to subscribe to a group label at group or project level

app/assets/javascripts/group_label_subscription.js.es6

+/* eslint-disable */
+(function(global) {
+  class GroupLabelSubscription {
+    constructor(container) {
+      const $container = $(container);
+      this.$dropdown = $container.find('.dropdown');
+      this.$unsubscribeBtn = $container.find('.js-unsubscribe-button');
+
+      $container.on('click', '.js-subscribe-button', this.subscribe.bind(this));
+      $container.on('click', '.js-unsubscribe-button', this.unsubscribe.bind(this));
+    }
+
+    unsubscribe(event) {
+      event.preventDefault();
+
+      const url = this.$unsubscribeBtn.attr('data-url');
+
+      $.ajax({
+        type: 'POST',
+        url: url
+      }).done(() => {
+        this.$dropdown.toggleClass('hidden');
+        this.$unsubscribeBtn.toggleClass('hidden');
+        this.$unsubscribeBtn.removeAttr('data-url');
+      });
+    }
+
+    subscribe(event) {
+      event.preventDefault();
+
+      const $btn = $(event.currentTarget);
+      const url = $btn.attr('data-url');
+
+      this.$unsubscribeBtn.attr('data-url', url);
+
+      $.ajax({
+        type: 'POST',
+        url: url
+      }).done(() => {
+        this.$dropdown.toggleClass('hidden');
+        this.$unsubscribeBtn.toggleClass('hidden');
+      });
+    }
+  }
+
+  global.GroupLabelSubscription = GroupLabelSubscription;
+
+})(window.gl || (window.gl = {}));

app/assets/stylesheets/pages/labels.scss

@@ -90,7 +90,7 @@
 
     @media (min-width: $screen-sm-min) {
       display: inline-block;
-      width: 35%;
+      width: 30%;
       margin-left: 10px;
       margin-bottom: 0;
       vertical-align: middle;
@@ -222,6 +222,14 @@
   width: 100%;
 }
 
+.label-subscription {
+  vertical-align: middle;
+
+  .dropdown-group-label a {
+    cursor: pointer;
+  }
+}
+
 .label-subscribe-button {
   .label-subscribe-button-icon {
     &[disabled] {

app/helpers/labels_helper.rb

@@ -140,6 +140,20 @@ module LabelsHelper
     end
   end
 
+  def group_label_subscription_status(label, project)
+    return 'project-level' if label.subscribed?(current_user, project)
+    return 'group-level' if label.subscribed?(current_user)
+
+    'unsubscribed'
+  end
+
+  def group_label_unsubscribe_path(label, project)
+    case group_label_subscription_status(label, project)
+    when 'project-level' then toggle_subscription_namespace_project_label_path(@project.namespace, @project, label)
+    when 'group-level' then toggle_subscription_group_label_path(label.group, label)
+    end
+  end
+
   def label_subscription_status(label, project)
     label.subscribed?(current_user, project) ? 'subscribed' : 'unsubscribed'
   end

app/models/concerns/subscribable.rb

@@ -33,22 +33,41 @@ module Subscribable
   end
 
   def toggle_subscription(user, project = nil)
+    unsubscribe_from_other_levels(user, project)
+
     find_or_initialize_subscription(user, project).
       update(subscribed: !subscribed?(user, project))
   end
 
   def subscribe(user, project = nil)
-    find_or_initialize_subscription(user, project).
-      update(subscribed: true)
+    unsubscribe_from_other_levels(user, project)
+
+    find_or_initialize_subscription(user, project)
+      .update(subscribed: true)
   end
 
   def unsubscribe(user, project = nil)
-    find_or_initialize_subscription(user, project).
-      update(subscribed: false)
+    unsubscribe_from_other_levels(user, project)
+
+    find_or_initialize_subscription(user, project)
+      .update(subscribed: false)
   end
 
   private
 
+  def unsubscribe_from_other_levels(user, project)
+    other_subscriptions = subscriptions.where(user: user)
+
+    other_subscriptions =
+      if project.blank?
+        other_subscriptions.where.not(project: nil)
+      else
+        other_subscriptions.where(project: nil)
+      end
+
+    other_subscriptions.update_all(subscribed: false)
+  end
+
   def find_or_initialize_subscription(user, project)
     subscriptions.
       find_or_initialize_by(user_id: user.id, project_id: project.try(:id))

app/views/shared/_label.html.haml

@@ -20,7 +20,7 @@
             = pluralize open_issues_count, 'open issue'
         - if current_user && defined?(@project)
           %li.label-subscription
-            %a.js-subscribe-button.label-subscribe-button.subscription-status{ role: "button", href: "#", data: { toggle: "tooltip", status: label_subscription_status(label, @project), url: toggle_subscription_namespace_project_label_path(@project.namespace, @project, label) } }
+            %a.js-subscribe-button.label-subscribe-button{ role: 'button', href: '#', data: { toggle: 'tooltip', status: label_subscription_status(label, @project), url: toggle_subscription_namespace_project_label_path(@project.namespace, @project, label) } }
               %span= label_subscription_toggle_button_text(label, @project)
         - if can?(current_user, :admin_label, label)
           %li
@@ -36,9 +36,27 @@
 
     - if current_user && defined?(@project)
       .label-subscription.inline
-        %button.js-subscribe-button.label-subscribe-button.btn.btn-default.btn-action.subscription-status{ type: "button", title: label_subscription_toggle_button_text(label, @project), data: { toggle: "tooltip", status: label_subscription_status(label, @project), url: toggle_subscription_namespace_project_label_path(@project.namespace, @project, label) } }
-          %span= label_subscription_toggle_button_text(label, @project)
-          = icon('spinner spin', class: 'label-subscribe-button-loading')
+        - if label.is_a?(ProjectLabel)
+          %button.js-subscribe-button.label-subscribe-button.btn.btn-default.btn-action{ type: 'button', title: label_subscription_toggle_button_text(label, @project), data: { toggle: 'tooltip', status: label_subscription_status(label, @project), url: toggle_subscription_namespace_project_label_path(@project.namespace, @project, label) } }
+            %span= label_subscription_toggle_button_text(label, @project)
+            = icon('spinner spin', class: 'label-subscribe-button-loading')
+        - else
+          - status = group_label_subscription_status(label, @project).inquiry
+
+          %button.js-unsubscribe-button.label-subscribe-button.btn.btn-default.btn-action{ type: 'button', class: ('hidden' if status.unsubscribed?), title: 'Unsubscribe', data: { toggle: 'tooltip', url: group_label_unsubscribe_path(label, @project) } }
+            %span Unsubscribe
+            = icon('spinner spin', class: 'label-subscribe-button-loading')
+
+          .dropdown.dropdown-group-label{ class: ('hidden' unless status.unsubscribed?) }
+            %button.dropdown-menu-toggle{type: 'button', 'data-toggle' => 'dropdown'}
+              %span Subscribe
+              = icon('chevron-down')
+            %ul.dropdown-menu
+              %li
+                %a.js-subscribe-button{ data: { url: toggle_subscription_namespace_project_label_path(@project.namespace, @project, label) } }
+                  Project level
+                %a.js-subscribe-button{ data: { url: toggle_subscription_group_label_path(label.group, label) } }
+                  Group level
 
     - if can?(current_user, :admin_label, label)
       = link_to edit_label_path(label), title: "Edit", class: 'btn btn-transparent btn-action', data: {toggle: "tooltip"} do
@@ -49,5 +67,9 @@
         = icon('trash-o')
 
   - if current_user && defined?(@project)
-    :javascript
-      new gl.LabelSubscription('##{dom_id(label)} .label-subscription');
+    - if label.is_a?(ProjectLabel)
+      :javascript
+        new gl.LabelSubscription('##{dom_id(label)} .label-subscription');
+    - else
+      :javascript
+        new gl.GroupLabelSubscription('##{dom_id(label)} .label-subscription');