Persists search filter state per project/group

app/controllers/application_controller.rb

@@ -6,6 +6,7 @@ class ApplicationController < ActionController::Base
   include Gitlab::GonHelper
   include GitlabRoutingHelper
   include PageLayoutHelper
+  include SearchCookies
   before_action :authenticate_user_from_token!
   before_action :authenticate_user!
@@ -354,24 +355,4 @@ class ApplicationController < ActionController::Base
     current_user.nil? && root_path == request.path
   end
-
-  private
-
-  def set_default_sort
-    key = if is_a_listing_page_for?('issues') || is_a_listing_page_for?('merge_requests')
-            'issuable_sort'
-          end
-
-    cookies[key]  = params[:sort] if key && params[:sort].present?
-    params[:sort] = cookies[key] if key
-    params[:sort] ||= 'id_desc'
-  end
-
-  def is_a_listing_page_for?(page_type)
-    controller_name, action_name = params.values_at(:controller, :action)
-
-    (controller_name == "projects/#{page_type}" && action_name == 'index') ||
-    (controller_name == 'groups' && action_name == page_type) ||
-    (controller_name == 'dashboard' && action_name == page_type)
-  end
 end

app/controllers/concerns/search_cookies.rb

+#Persists filter state per project or group using cookies
+module SearchCookies
+  extend ActiveSupport::Concern
+
+  private
+
+  def set_default_sort
+    key = if is_a_listing_page_for?('issues') || is_a_listing_page_for?('merge_requests')
+            'issuable_sort'
+          end
+
+    params[:sort] = get_cookie_value(key)
+    params[:sort] ||= 'id_desc'
+  end
+
+  #Save cookies based on user sessions
+  def get_cookie_value(key)
+    return unless key
+
+    subkey = "group_#{@group.id}" if @group.present?
+    subkey = "project_#{@project.id}" if @project.present?
+
+    begin
+      parsed_cookie = JSON.parse(cookies[key]) if cookies[key].present?
+      hash =  parsed_cookie || {}
+      hash[subkey] = params[:sort] if params[:sort].present?
+      cookies[key] = JSON.generate(hash)
+    rescue
+      return
+    end
+
+    return hash[subkey]
+  end
+
+  def is_a_listing_page_for?(page_type)
+    controller_name, action_name = params.values_at(:controller, :action)
+
+    (controller_name == "projects/#{page_type}" && action_name == 'index') ||
+    (controller_name == 'groups' && action_name == page_type) ||
+    (controller_name == 'dashboard' && action_name == page_type)
+  end
+end