Add subscribe filter to labels page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

14 files changed, 190 insertions, 21 deletions

diff --git a/app/controllers/groups/labels_controller.rb b/app/controllers/groups/labels_controller.rb
index cb9ab35de85..26768c628ca 100644
--- a/app/controllers/groups/labels_controller.rb
+++ b/app/controllers/groups/labels_controller.rb
@@ -12,7 +12,8 @@ class Groups::LabelsController < Groups::ApplicationController
   def index
     respond_to do |format|
       format.html do
-        @labels = GroupLabelsFinder.new(@group, params.merge(sort: sort)).execute
+        @labels = GroupLabelsFinder
+          .new(current_user, @group, params.merge(sort: sort)).execute
       end
       format.json do
         render json: LabelSerializer.new.represent_appearance(available_labels)
diff --git a/app/controllers/projects/labels_controller.rb b/app/controllers/projects/labels_controller.rb
index a0ce3b08d9f..640038818f2 100644
--- a/app/controllers/projects/labels_controller.rb
+++ b/app/controllers/projects/labels_controller.rb
@@ -163,6 +163,7 @@ class Projects::LabelsController < Projects::ApplicationController
                        project_id: @project.id,
                        include_ancestor_groups: params[:include_ancestor_groups],
                        search: params[:search],
+                       subscribed: params[:subscribed],
                        sort: sort).execute
   end
 
diff --git a/app/finders/group_labels_finder.rb b/app/finders/group_labels_finder.rb
index 903023033ed..a668a0f0fae 100644
--- a/app/finders/group_labels_finder.rb
+++ b/app/finders/group_labels_finder.rb
@@ -1,17 +1,29 @@
 # frozen_string_literal: true
 
 class GroupLabelsFinder
-  attr_reader :group, :params
+  attr_reader :current_user, :group, :params
 
-  def initialize(group, params = {})
+  def initialize(current_user, group, params = {})
+    @current_user = current_user
     @group = group
     @params = params
   end
 
   def execute
     group.labels
+      .optionally_subscribed_by(subscriber_id)
       .optionally_search(params[:search])
       .order_by(params[:sort])
       .page(params[:page])
   end
+
+  private
+
+  def subscriber_id
+    current_user&.id if subscribed?
+  end
+
+  def subscribed?
+    params[:subscribed] == 'true'
+  end
 end
diff --git a/app/finders/labels_finder.rb b/app/finders/labels_finder.rb
index 08fc2968e77..82e0b2ed9e1 100644
--- a/app/finders/labels_finder.rb
+++ b/app/finders/labels_finder.rb
@@ -17,6 +17,7 @@ class LabelsFinder < UnionFinder
     @skip_authorization = skip_authorization
     items = find_union(label_ids, Label) || Label.none
     items = with_title(items)
+    items = by_subscription(items)
     items = by_search(items)
     sort(items)
   end
@@ -84,6 +85,18 @@ class LabelsFinder < UnionFinder
     labels.search(params[:search])
   end
 
+  def by_subscription(labels)
+    labels.optionally_subscribed_by(subscriber_id)
+  end
+
+  def subscriber_id
+    current_user&.id if subscribed?
+  end
+
+  def subscribed?
+    params[:subscribed] == 'true'
+  end
+
   # Gets redacted array of group ids
   # which can include the ancestors and descendants of the requested group.
   def group_ids_for(group)
diff --git a/app/models/label.rb b/app/models/label.rb
index 9ef57a05b3e..43b49445765 100644
--- a/app/models/label.rb
+++ b/app/models/label.rb
@@ -45,6 +45,7 @@ class Label < ActiveRecord::Base
   scope :on_project_boards, ->(project_id) { with_lists_and_board.where(boards: { project_id: project_id }) }
   scope :order_name_asc, -> { reorder(title: :asc) }
   scope :order_name_desc, -> { reorder(title: :desc) }
+  scope :subscribed_by, ->(user_id) { joins(:subscriptions).where(subscriptions: { user_id: user_id, subscribed: true }) }
 
   def self.prioritized(project)
     joins(:priorities)
@@ -74,6 +75,14 @@ class Label < ActiveRecord::Base
     joins(label_priorities)
   end
 
+  def self.optionally_subscribed_by(user_id)
+    if user_id
+      subscribed_by(user_id)
+    else
+      all
+    end
+  end
+
   alias_attribute :name, :title
 
   def self.reference_prefix
diff --git a/app/views/groups/labels/index.html.haml b/app/views/groups/labels/index.html.haml
index 003bd25dd06..77be21ae2d0 100644
--- a/app/views/groups/labels/index.html.haml
+++ b/app/views/groups/labels/index.html.haml
@@ -3,20 +3,29 @@
 - can_admin_label = can?(current_user, :admin_label, @group)
 - issuables = ['issues', 'merge requests']
 - search = params[:search]
+- subscribed = params[:subscribed]
+- labels_or_filters = @labels.exists? || search.present? || subscribed.present?
 
 - if can_admin_label
   - content_for(:header_content) do
     .nav-controls
       = link_to _('New label'), new_group_label_path(@group), class: "btn btn-success"
 
-- if @labels.exists? || search.present?
+- if labels_or_filters
   #promote-label-modal
   %div{ class: container_class }
     .top-area.adjust
-      .nav-text
-        = _('Labels can be applied to %{features}. Group labels are available for any project within the group.') % { features: issuables.to_sentence }
+      %ul.nav-links.nav.nav-tabs
+        %li{ class: active_when(subscribed != 'true') }>
+          = link_to group_labels_path(@group) do
+            = _('All')
+        - if current_user
+          %li{ class: active_when(subscribed == 'true') }>
+            = link_to group_labels_path(@group, subscribed: 'true') do
+              = _('Subscribed')
       .nav-controls
         = form_tag group_labels_path(@group), method: :get do
+          = hidden_field_tag :subscribed, params[:subscribed]
           .input-group
             = search_field_tag :search, params[:search], { placeholder: _('Filter'), id: 'label-search', class: 'form-control search-text-input input-short', spellcheck: false }
             %span.input-group-append
@@ -26,6 +35,8 @@
 
     .labels-container.prepend-top-5
       - if @labels.any?
+        .text-muted
+          = _('Labels can be applied to %{features}. Group labels are available for any project within the group.') % { features: issuables.to_sentence }
         .other-labels
           %h5= _('Labels')
           %ul.content-list.manage-labels-list.js-other-labels
@@ -34,6 +45,9 @@
       - elsif search.present?
         .nothing-here-block
           = _('No labels with such name or description')
+      - elsif subscribed.present?
+        .nothing-here-block
+          = _('You do not have any subscriptions yet')
 - else
   = render 'shared/empty_states/labels'
 
diff --git a/app/views/projects/labels/index.html.haml b/app/views/projects/labels/index.html.haml
index 683dda4f166..c6b98c03ce5 100644
--- a/app/views/projects/labels/index.html.haml
+++ b/app/views/projects/labels/index.html.haml
@@ -2,21 +2,30 @@
 - page_title "Labels"
 - can_admin_label = can?(current_user, :admin_label, @project)
 - search = params[:search]
+- subscribed = params[:subscribed]
+- labels_or_filters = @labels.exists? || @prioritized_labels.exists? || search.present? || subscribed.present?
 
 - if can_admin_label
   - content_for(:header_content) do
     .nav-controls
       = link_to _('New label'), new_project_label_path(@project), class: "btn btn-success"
 
-- if @labels.exists? || @prioritized_labels.exists? || search.present?
+- if labels_or_filters
   #promote-label-modal
   %div{ class: container_class }
     .top-area.adjust
-      .nav-text
-        = _('Labels can be applied to issues and merge requests.')
+      %ul.nav-links.nav.nav-tabs
+        %li{ class: active_when(subscribed != 'true') }>
+          = link_to project_labels_path(@project) do
+            = _('All')
+        - if current_user
+          %li{ class: active_when(subscribed == 'true') }>
+            = link_to project_labels_path(@project, subscribed: 'true') do
+              = _('Subscribed')
 
       .nav-controls
         = form_tag project_labels_path(@project), method: :get do
+          = hidden_field_tag :subscribed, params[:subscribed]
           .input-group
             = search_field_tag :search, params[:search], { placeholder: _('Filter'), id: 'label-search', class: 'form-control search-text-input input-short', spellcheck: false }
             %span.input-group-append
@@ -28,6 +37,8 @@
       - if can_admin_label
         - if search.blank?
           %p.text-muted
+            = _('Labels can be applied to issues and merge requests.')
+            %br
             = _('Star a label to make it a priority label. Order the prioritized labels to change their relative priority, by dragging.')
         -# Only show it in the first page
         - hide = @available_labels.empty? || (params[:page].present? && params[:page] != '1')
@@ -59,7 +70,9 @@
           - else
             .nothing-here-block
               = _('No labels with such name or description')
-
+      - elsif subscribed.present?
+        .nothing-here-block
+          = _('You do not have any subscriptions yet')
 
 - else
   = render 'shared/empty_states/labels'
diff --git a/app/views/shared/labels/_sort_dropdown.html.haml b/app/views/shared/labels/_sort_dropdown.html.haml
index ff6e2947ffd..8a7d037e15b 100644
--- a/app/views/shared/labels/_sort_dropdown.html.haml
+++ b/app/views/shared/labels/_sort_dropdown.html.haml
@@ -6,4 +6,4 @@
   %ul.dropdown-menu.dropdown-menu-right.dropdown-menu-sort
     %li
       - label_sort_options_hash.each do |value, title|
-        = sortable_item(title, page_filter_path(sort: value, label: true), sort_title)
+        = sortable_item(title, page_filter_path(sort: value, label: true, subscribed: params[:subscribed]), sort_title)
diff --git a/changelogs/unreleased/dz-labels-subscribe-filter.yml b/changelogs/unreleased/dz-labels-subscribe-filter.yml
new file mode 100644
index 00000000000..768c20c77c7
--- /dev/null
+++ b/changelogs/unreleased/dz-labels-subscribe-filter.yml
@@ -0,0 +1,5 @@
+---
+title: Add subscribe filter to group and project labels pages
+merge_request: 21965
+author:
+type: added
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 93c7ff32946..47ea026a447 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -5786,6 +5786,9 @@ msgstr ""
 msgid "Subscribe at project level"
 msgstr ""
 
+msgid "Subscribed"
+msgstr ""
+
 msgid "Summary of issues, merge requests, push events, and comments (Timezone: %{utcFormatted})"
 msgstr ""
 
@@ -6962,6 +6965,9 @@ msgstr ""
 msgid "You cannot write to this read-only GitLab instance."
 msgstr ""
 
+msgid "You do not have any subscriptions yet"
+msgstr ""
+
 msgid "You don't have any applications"
 msgstr ""
 
diff --git a/spec/features/groups/labels/subscription_spec.rb b/spec/features/groups/labels/subscription_spec.rb
index d9543bfa97f..22b51b297a6 100644
--- a/spec/features/groups/labels/subscription_spec.rb
+++ b/spec/features/groups/labels/subscription_spec.rb
@@ -3,7 +3,8 @@ require 'spec_helper'
 describe 'Labels subscription' do
   let(:user)     { create(:user) }
   let(:group)    { create(:group) }
-  let!(:feature) { create(:group_label, group: group, title: 'feature') }
+  let!(:label1)  { create(:group_label, group: group, title: 'foo') }
+  let!(:label2)  { create(:group_label, group: group, title: 'bar') }
 
   context 'when signed in' do
     before do
@@ -14,9 +15,9 @@ describe 'Labels subscription' do
     it 'users can subscribe/unsubscribe to group labels', :js do
       visit group_labels_path(group)
 
-      expect(page).to have_content('feature')
+      expect(page).to have_content(label1.title)
 
-      within "#group_label_#{feature.id}" do
+      within "#group_label_#{label1.id}" do
         expect(page).not_to have_button 'Unsubscribe'
 
         click_button 'Subscribe'
@@ -30,15 +31,48 @@ describe 'Labels subscription' do
         expect(page).not_to have_button 'Unsubscribe'
       end
     end
+
+    context 'subscription filter' do
+      before do
+        visit group_labels_path(group)
+      end
+
+      it 'shows only subscribed labels' do
+        label1.subscribe(user)
+
+        click_subscribed_tab
+
+        page.within('.labels-container') do
+          expect(page).to have_content label1.title
+        end
+      end
+
+      it 'shows no subscribed labels message' do
+        click_subscribed_tab
+
+        page.within('.labels-container') do
+          expect(page).not_to have_content label1.title
+          expect(page).to have_content('You do not have any subscriptions yet')
+        end
+      end
+    end
   end
 
   context 'when not signed in' do
-    it 'users can not subscribe/unsubscribe to labels' do
+    before do
       visit group_labels_path(group)
+    end
 
-      expect(page).to have_content 'feature'
+    it 'users can not subscribe/unsubscribe to labels' do
+      expect(page).to have_content label1.title
       expect(page).not_to have_button('Subscribe')
     end
+
+    it 'does not show subscribed tab' do
+      page.within('.nav-tabs') do
+        expect(page).not_to have_link 'Subscribed'
+      end
+    end
   end
 
   def click_link_on_dropdown(text)
@@ -48,4 +82,10 @@ describe 'Labels subscription' do
       find('a.js-subscribe-button', text: text).click
     end
   end
+
+  def click_subscribed_tab
+    page.within('.nav-tabs') do
+      click_link 'Subscribed'
+    end
+  end
 end
diff --git a/spec/finders/group_labels_finder_spec.rb b/spec/finders/group_labels_finder_spec.rb
index ef68fc105e4..7bdd312eff0 100644
--- a/spec/finders/group_labels_finder_spec.rb
+++ b/spec/finders/group_labels_finder_spec.rb
@@ -4,29 +4,38 @@ require 'spec_helper'
 
 describe GroupLabelsFinder, '#execute' do
   let!(:group) { create(:group) }
+  let!(:user)  { create(:user) }
   let!(:label1) { create(:group_label, title: 'Foo', description: 'Lorem ipsum', group: group) }
   let!(:label2) { create(:group_label, title: 'Bar', description: 'Fusce consequat', group: group) }
 
   it 'returns all group labels sorted by name if no params' do
-    result = described_class.new(group).execute
+    result = described_class.new(user, group).execute
 
     expect(result.to_a).to match_array([label2, label1])
   end
 
   it 'returns all group labels sorted by name desc' do
-    result = described_class.new(group, sort: 'name_desc').execute
+    result = described_class.new(user, group, sort: 'name_desc').execute
 
     expect(result.to_a).to match_array([label2, label1])
   end
 
-  it 'returns group labels that march search' do
-    result = described_class.new(group, search: 'Foo').execute
+  it 'returns group labels that match search' do
+    result = described_class.new(user, group, search: 'Foo').execute
 
     expect(result.to_a).to match_array([label1])
   end
 
+  it 'returns group labels user subscribed to' do
+    label2.subscribe(user)
+
+    result = described_class.new(user, group, subscribed: 'true').execute
+
+    expect(result.to_a).to match_array([label2])
+  end
+
   it 'returns second page of labels' do
-    result = described_class.new(group, page: '2').execute
+    result = described_class.new(user, group, page: '2').execute
 
     expect(result.to_a).to match_array([])
   end
diff --git a/spec/finders/labels_finder_spec.rb b/spec/finders/labels_finder_spec.rb
index f5cec8e349a..9abc52aa664 100644
--- a/spec/finders/labels_finder_spec.rb
+++ b/spec/finders/labels_finder_spec.rb
@@ -210,5 +210,15 @@ describe LabelsFinder do
         expect(finder.execute).to eq [project_label_1]
       end
     end
+
+    context 'filter by subscription' do
+      it 'returns labels user subscribed to' do
+        project_label_1.subscribe(user)
+
+        finder = described_class.new(user, subscribed: 'true')
+
+        expect(finder.execute).to eq [project_label_1]
+      end
+    end
   end
 end
diff --git a/spec/models/label_spec.rb b/spec/models/label_spec.rb
index 99670af786a..3fc6c06b7fa 100644
--- a/spec/models/label_spec.rb
+++ b/spec/models/label_spec.rb
@@ -155,4 +155,40 @@ describe Label do
       expect(described_class.search('feature')).to be_empty
     end
   end
+
+  describe '.subscribed_by' do
+    let!(:user)   { create(:user) }
+    let!(:label)  { create(:label) }
+    let!(:label2) { create(:label) }
+
+    before do
+      label.subscribe(user)
+    end
+
+    it 'returns subscribed labels' do
+      expect(described_class.subscribed_by(user.id)).to eq([label])
+    end
+
+    it 'returns nothing' do
+      expect(described_class.subscribed_by(0)).to be_empty
+    end
+  end
+
+  describe '.optionally_subscribed_by' do
+    let!(:user)   { create(:user) }
+    let!(:label)  { create(:label) }
+    let!(:label2) { create(:label) }
+
+    before do
+      label.subscribe(user)
+    end
+
+    it 'returns subscribed labels' do
+      expect(described_class.optionally_subscribed_by(user.id)).to eq([label])
+    end
+
+    it 'returns all labels if user_id is nil' do
+      expect(described_class.optionally_subscribed_by(nil)).to match_array([label, label2])
+    end
+  end
 end