Reinstate sorting by weight in issues

We accidentally removed the ability to sort issues by weight when
porting a sorting change to EE, so this fixes that.

app/controllers/concerns/issuable_collections.rb

@@ -200,5 +200,3 @@ module IssuableCollections
                                 end
   end
 end
-
-IssuableCollections.prepend(EE::IssuableCollections)

app/helpers/sorting_helper.rb

@@ -161,6 +161,15 @@ module SortingHelper
     sort_options_hash[sort_value]
   end
 
+  def issuable_sort_icon_suffix(sort_value)
+    case sort_value
+    when sort_value_milestone, sort_value_due_date, /_asc\z/
+      'lowest'
+    else
+      'highest'
+    end
+  end
+
   def issuable_sort_direction_button(sort_value)
     link_class = 'btn btn-default has-tooltip reverse-sort-btn qa-reverse-sort'
     reverse_sort = issuable_reverse_sort_order_hash[sort_value]
@@ -173,15 +182,7 @@ module SortingHelper
     end
 
     link_to(reverse_url, type: 'button', class: link_class, title: 'Sort direction') do
-      icon_suffix =
-        case sort_value
-        when sort_value_milestone, sort_value_due_date, /_asc\z/
-          'lowest'
-        else
-          'highest'
-        end
-
-      sprite_icon("sort-#{icon_suffix}", size: 16)
+      sprite_icon("sort-#{issuable_sort_icon_suffix(sort_value)}", size: 16)
     end
   end
 

app/views/shared/issuable/_sort_dropdown.html.haml

@@ -17,4 +17,5 @@
           = sortable_item(sort_title_due_date,         page_filter_path(sort: sort_value_due_date),         sort_title) if viewing_issues
           = sortable_item(sort_title_popularity,       page_filter_path(sort: sort_value_popularity),       sort_title)
           = sortable_item(sort_title_label_priority,   page_filter_path(sort: sort_value_label_priority),   sort_title)
+          = render_if_exists('shared/ee/issuable/sort_dropdown', viewing_issues: viewing_issues, sort_title: sort_title)
     = issuable_sort_direction_button(sort_value)

ee/app/controllers/concerns/ee/issuable_collections.rb

-# frozen_string_literal: true
-
-module EE
-  module IssuableCollections
-    extend ActiveSupport::Concern
-    extend ::Gitlab::Utils::Override
-
-    # Update old values to the actual ones.
-    override :update_cookie_value
-    def update_cookie_value(value)
-      if value == 'weight_asc' || value == 'weight_desc'
-        sort_value_weight
-      else
-        super
-      end
-    end
-  end
-end

ee/app/helpers/ee/sorting_helper.rb

@@ -41,6 +41,29 @@ module EE
       }
     end
 
+    override :issuable_reverse_sort_order_hash
+    def issuable_reverse_sort_order_hash
+      {
+        sort_value_weight => sort_value_more_weight
+      }.merge(super)
+    end
+
+    override :issuable_sort_option_overrides
+    def issuable_sort_option_overrides
+      {
+        sort_value_more_weight => sort_value_weight
+      }.merge(super)
+    end
+
+    override :issuable_sort_icon_suffix
+    def issuable_sort_icon_suffix(sort_value)
+      if sort_value == sort_value_weight
+        'lowest'
+      else
+        super
+      end
+    end
+
     # Creates a button with the opposite ordering for the current field in UI.
     def sort_order_button(sort)
       opposite_sorting_param = epics_ordering_options_hash[sort] || epics_ordering_options_hash.key(sort)

ee/app/views/shared/ee/issuable/_sort_dropdown.html.haml

+- allow_weight_sort = viewing_issues && (@project || @group)&.feature_available?(:issue_weights)
+= sortable_item(sort_title_weight, page_filter_path(sort: sort_value_weight), sort_title) if allow_weight_sort