Add sorting dropdown to tag page

CHANGELOG

@@ -84,6 +84,7 @@ v 8.9.0 (unreleased)
   - Show categorised search queries in the search autocomplete
   - RepositoryCheck::SingleRepositoryWorker public and private methods are now instrumented
   - Improve issuables APIs performance when accessing notes !4471
+  - Add sorting dropdown to tags page !4423
   - External links now open in a new tab
   - Prevent default actions of disabled buttons and links
   - Markdown editor now correctly resets the input value on edit cancellation !4175

app/controllers/projects/tags_controller.rb

@@ -6,8 +6,10 @@ class Projects::TagsController < Projects::ApplicationController
   before_action :authorize_admin_project!, only: [:destroy]
 
   def index
-    sorted = VersionSorter.rsort(@repository.tag_names)
-    @tags = Kaminari.paginate_array(sorted).page(params[:page])
+    @sort = params[:sort] || 'name'
+    @tags = @repository.tags_sorted_by(@sort)
+    @tags = Kaminari.paginate_array(@tags).page(params[:page])
+
     @releases = project.releases.where(tag: @tags)
   end
 

app/models/repository.rb

@@ -598,6 +598,21 @@ class Repository
     end
   end
 
+  def tags_sorted_by(value)
+    case value
+    when 'name'
+      # Would be better to use `sort_by` but `version_sorter` only exposes
+      # `sort` and `rsort`
+      VersionSorter.rsort(tag_names).map { |tag_name| find_tag(tag_name) }
+    when 'updated_desc'
+      tags_sorted_by_committed_date.reverse
+    when 'updated_asc'
+      tags_sorted_by_committed_date
+    else
+      tags
+    end
+  end
+
   def contributors
     commits = self.commits(nil, limit: 2000, offset: 0, skip_merges: true)
 
@@ -995,4 +1010,8 @@ class Repository
   def file_on_head(regex)
     tree(:head).blobs.find { |file| file.name =~ regex }
   end
+
+  def tags_sorted_by_committed_date
+    tags.sort_by { |tag| commit(tag.target).committed_date }
+  end
 end

app/views/projects/tags/index.html.haml

@@ -11,12 +11,23 @@
       .nav-controls
         = link_to new_namespace_project_tag_path(@project.namespace, @project), class: 'btn btn-create new-tag-btn' do
           New tag
+        .dropdown.inline
+          %button.dropdown-toggle.btn{ type: 'button', data: { toggle: 'dropdown'} }
+            %span.light= @sort.humanize
+            %b.caret
+          %ul.dropdown-menu.dropdown-menu-align-right
+            %li
+              = link_to namespace_project_tags_path(sort: nil) do
+                Name
+              = link_to namespace_project_tags_path(sort: sort_value_recently_updated) do
+                = sort_title_recently_updated
+              = link_to namespace_project_tags_path(sort: sort_value_oldest_updated) do
+                = sort_title_oldest_updated
 
   .tags
     - unless @tags.empty?
       %ul.content-list
-        - @tags.each do |tag|
-          = render 'tag', tag: @repository.find_tag(tag)
+        = render partial: 'tag', collection: @tags
 
       = paginate @tags, theme: 'gitlab'
 

spec/models/repository_spec.rb

@@ -31,6 +31,47 @@ describe Repository, models: true do
     it { is_expected.not_to include('v1.0.0') }
   end
 
+  describe 'tags_sorted_by' do
+    context 'name' do
+      subject { repository.tags_sorted_by('name').map(&:name) }
+
+      it { is_expected.to eq(['v1.1.0', 'v1.0.0']) }
+    end
+
+    context 'updated' do
+      let(:tag_a) { repository.find_tag('v1.0.0') }
+      let(:tag_b) { repository.find_tag('v1.1.0') }
+
+      context 'desc' do
+        subject { repository.tags_sorted_by('updated_desc').map(&:name) }
+
+        before do
+          double_first = double(committed_date: Time.now)
+          double_last = double(committed_date: Time.now - 1.second)
+
+          allow(repository).to receive(:commit).with(tag_a.target).and_return(double_first)
+          allow(repository).to receive(:commit).with(tag_b.target).and_return(double_last)
+        end
+
+        it { is_expected.to eq(['v1.0.0', 'v1.1.0']) }
+      end
+
+      context 'asc' do
+        subject { repository.tags_sorted_by('updated_asc').map(&:name) }
+
+        before do
+          double_first = double(committed_date: Time.now - 1.second)
+          double_last = double(committed_date: Time.now)
+
+          allow(repository).to receive(:commit).with(tag_a.target).and_return(double_last)
+          allow(repository).to receive(:commit).with(tag_b.target).and_return(double_first)
+        end
+
+        it { is_expected.to eq(['v1.1.0', 'v1.0.0']) }
+      end
+    end
+  end
+
   describe :last_commit_for_path do
     subject { repository.last_commit_for_path(sample_commit.id, '.gitignore').id }