Add sort dropdown to merge requests list

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/contexts/merge_requests_load_context.rb

@@ -30,6 +30,9 @@ class MergeRequestsLoadContext < BaseContext
       merge_requests = merge_requests.where(milestone_id: (params[:milestone_id] == '0' ? nil : params[:milestone_id]))
     end
 
+    # Sort by :sort param
+    merge_requests = merge_requests.sort(params[:sort])
+
     merge_requests
   end
 end

app/controllers/projects/merge_requests_controller.rb

@@ -17,6 +17,8 @@ class Projects::MergeRequestsController < Projects::ApplicationController
   before_filter :authorize_modify_merge_request!, only: [:close, :edit, :update, :sort]
 
   def index
+    sort_param = params[:sort] || 'newest'
+    @sort = sort_param.humanize unless sort_param.empty?
     @merge_requests = MergeRequestsLoadContext.new(project, current_user, params).execute
     assignee_id, milestone_id = params[:assignee_id], params[:milestone_id]
     @assignee = @project.team.find(assignee_id) if assignee_id.present? && !assignee_id.to_i.zero?

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

@@ -60,6 +60,8 @@
                     %strong= milestone.title
                     %small.light= milestone.expires_at
 
+          = render 'shared/sort_dropdown'
+
       %ul.well-list.mr-list
         = render @merge_requests
         - if @merge_requests.blank?