Add an option to list only archived projects

Closes #35994

app/finders/admin/projects_finder.rb

@@ -43,7 +43,13 @@ class Admin::ProjectsFinder
   end
 
   def by_archived(items)
-    items.non_archived unless params[:archived].present?
+    if params[:archived] == 'only'
+      items.archived
+    elsif params[:archived].blank?
+      items.non_archived
+    else
+      items
+    end
   end
 
   def by_personal(items)

app/finders/projects_finder.rb

@@ -125,9 +125,18 @@ class ProjectsFinder < UnionFinder
   end
 
   def by_archived(projects)
-    # Back-compatibility with the places where `params[:archived]` can be set explicitly to `false`
-    params[:non_archived] = !Gitlab::Utils.to_boolean(params[:archived]) if params.key?(:archived)
-
-    params[:non_archived] ? projects.non_archived : projects
+    if params[:non_archived]
+      projects.non_archived
+    elsif params.key?(:archived) # Back-compatibility with the places where `params[:archived]` can be set explicitly to `false`
+      if params[:archived] == 'only'
+        projects.archived
+      elsif Gitlab::Utils.to_boolean(params[:archived])
+        projects
+      else
+        projects.non_archived
+      end
+    else
+      projects
+    end
   end
 end

app/models/project.rb

@@ -247,6 +247,7 @@ class Project < ActiveRecord::Base
   scope :joined, ->(user) { where('namespace_id != ?', user.namespace_id) }
   scope :starred_by, ->(user) { joins(:users_star_projects).where('users_star_projects.user_id': user.id) }
   scope :visible_to_user, ->(user) { where(id: user.authorized_projects.select(:id).reorder(nil)) }
+  scope :archived, -> { where(archived: true) }
   scope :non_archived, -> { where(archived: false) }
   scope :for_milestones, ->(ids) { joins(:milestones).where('milestones.id' => ids).distinct }
   scope :with_push, -> { joins(:events).where('events.action = ?', Event::PUSHED) }

app/views/shared/projects/_dropdown.html.haml

@@ -15,8 +15,11 @@
       = link_to filter_projects_path(archived: nil), class: ("is-active" unless params[:archived].present?) do
         Hide archived projects
     %li
-      = link_to filter_projects_path(archived: true), class: ("is-active" if params[:archived].present?) do
+      = link_to filter_projects_path(archived: true), class: ("is-active" if Gitlab::Utils.to_boolean(params[:archived])) do
         Show archived projects
+    %li
+      = link_to filter_projects_path(archived: 'only'), class: ("is-active" if params[:archived] == 'only') do
+        Show archived projects only
     - if current_user
       %li.divider
       %li

changelogs/unreleased/35994-archived-projects-only.yml

@@ -0,0 +1,5 @@
+---
+title: Add an option to list only archived projects
+merge_request: 13492
+author: Mehdi Lahmam (@mehlah)
+type: added

spec/features/admin/admin_projects_spec.rb

@@ -36,6 +36,14 @@ describe "Admin::Projects"  do
       expect(page).to have_content(archived_project.name)
       expect(page).to have_xpath("//span[@class='label label-warning']", text: 'archived')
     end
+
+    it 'renders only archived projects', js: true do
+      find(:css, '#sort-projects-dropdown').click
+      click_link 'Show archived projects only'
+
+      expect(page).to have_content(archived_project.name)
+      expect(page).not_to have_content(project.name)
+    end
   end
 
   describe "GET /admin/projects/:namespace_id/:id" do

spec/features/dashboard/archived_projects_spec.rb

@@ -26,6 +26,13 @@ RSpec.describe 'Dashboard Archived Project' do
     expect(page).to have_link(archived_project.name)
   end
 
+  it 'renders only archived projects' do
+    click_link 'Show archived projects only'
+
+    expect(page).to have_content(archived_project.name)
+    expect(page).not_to have_content(project.name)
+  end
+
   it 'searchs archived projects', :js do
     click_button 'Last updated'
     click_link 'Show archived projects'

spec/finders/admin/projects_finder_spec.rb

@@ -118,6 +118,12 @@ describe Admin::ProjectsFinder do
 
         it { is_expected.to match_array([archived_project, shared_project, public_project, internal_project, private_project]) }
       end
+
+      context 'archived=only' do
+        let(:params) { { archived: 'only' } }
+
+        it { is_expected.to eq([archived_project]) }
+      end
     end
 
     context 'filter by personal' do

spec/finders/projects_finder_spec.rb

@@ -123,6 +123,12 @@ describe ProjectsFinder do
         it { is_expected.to match_array([public_project, internal_project, archived_project]) }
       end
 
+      describe 'filter by archived only' do
+        let(:params) { { archived: 'only' } }
+
+        it { is_expected.to eq([archived_project]) }
+      end
+
       describe 'filter by archived for backward compatibility' do
         let(:params) { { archived: false } }