Merge branch '14918-add-filter-dropdown-to-tag-page' into 'master'

Add sorting dropdown to tag page

## What does this MR do?

Adds a sorting dropdown to the tags page just like the one on the branches page.

## Are there points in the code the reviewer needs to double check?

No

## Why was this MR needed?

Clients were asking for this

## What are the relevant issue numbers?

Closes #14918

## Screenshots (if relevant)

![Captura_de_pantalla_2016-06-01_a_las_4.07.58_p.m.](/uploads/4530683ddd91d3bdbdce77748fe63f87/Captura_de_pantalla_2016-06-01_a_las_4.07.58_p.m..png)

See merge request !4423

1 files changed, 19 insertions, 0 deletions

diff --git a/app/models/repository.rb b/app/models/repository.rb
index 65d1bad511d..bbd7682d8e7 100644
--- a/app/models/repository.rb
+++ b/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