Adds ordering to projects contributors in API

Allows ordering in GET api/v4/projects/:project_id/repository/contributors
through `order_by` and `sort` params.
The available `order_by` options are: name|email|commits.
The available `sort` options are: asc|desc.

1 files changed, 7 insertions, 2 deletions

diff --git a/app/models/repository.rb b/app/models/repository.rb
index d1ae3304e4a..c01188315fd 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -701,10 +701,14 @@ class Repository
     end
   end
 
-  def contributors
+  # Params:
+  #
+  # order_by: name|email|commits
+  # sort: asc|desc default: 'asc'
+  def contributors(order_by: nil, sort: 'asc')
     commits = self.commits(nil, limit: 2000, offset: 0, skip_merges: true)
 
-    commits.group_by(&:author_email).map do |email, commits|
+    commits = commits.group_by(&:author_email).map do |email, commits|
       contributor = Gitlab::Contributor.new
       contributor.email = email
 
@@ -718,6 +722,7 @@ class Repository
 
       contributor
     end
+    Commit.order_by(collection: commits, order_by: order_by, sort: sort)
   end
 
   def refs_contains_sha(ref_type, sha)