Move API contributors logic to repository model

app/models/repository.rb

@@ -242,4 +242,30 @@ class Repository
       branches
     end
   end
+
+  def contributors
+    contributors = {}
+    log = graph_log.group_by { |i| i[:author_email] }
+
+    log.each do |email, contributions|
+      contributors[email] = {
+        email: email,
+        commits: 0,
+        additions: 0,
+        deletions: 0,
+      }
+
+      contributions.each do |contribution|
+        if contributors[email][:name].blank?
+          contributors[email][:name] = contribution[:author_name]
+        end
+
+        contributors[email][:commits] += 1
+        contributors[email][:additions] += contribution[:additions] || 0
+        contributors[email][:deletions] += contribution[:deletions] || 0
+      end
+    end
+
+    contributors.values
+  end
 end

lib/api/repositories.rb

@@ -160,29 +160,7 @@ module API
       get ':id/repository/contributors' do
         authorize! :download_code, user_project
 
-        contributors = {}
-        contributors
-
-        log = user_project.repository.graph_log
-        log.each do |entry|
-          email = entry[:author_email].to_s
-
-          if contributors.has_key?(email)
-            contributors[email][:commits] += 1
-            contributors[email][:additions] += entry[:additions] || 0
-            contributors[email][:deletions] += entry[:deletions] || 0
-          else
-            contributors[email] = {
-              email: email,
-              name: entry[:author_name],
-              commits: 1,
-              additions: entry[:additions] || 0,
-              deletions: entry[:deletions] || 0,
-            }
-          end
-        end
-
-        contributors
+        user_project.repository.contributors
       end
     end
   end

lib/gitlab/contributors.rb

+module Gitlab
+  class Contributor
+    attr_accessor :email, :name, :commits, :additions, :deletions
+
+    def initialize
+
+    end
+  end
+end

spec/requests/api/repositories_spec.rb

@@ -171,7 +171,8 @@ describe API::API, api: true  do
     it 'should return valid data' do
       get api("/projects/#{project.id}/repository/contributors", user)
       response.status.should == 200
-      contributor = json_response.values.first
+      json_response.should be_an Array
+      contributor = json_response.first
       contributor['email'].should == 'dmitriy.zaporozhets@gmail.com'
       contributor['name'].should == 'Dmitriy Zaporozhets'
       contributor['commits'].should == 185