Board issue filters support negated current iteration

- Support negated IterationIdWildcard for board issue filters
- Move negated_board_issue_input_type into it's own file

app/graphql/resolvers/concerns/board_issue_filterable.rb

@@ -7,10 +7,10 @@ module BoardIssueFilterable
 
   def issue_filters(args)
     filters = args.to_h
+
     set_filter_values(filters)
 
     if filters[:not]
-      filters[:not] = filters[:not].to_h
       set_filter_values(filters[:not])
     end
 

app/graphql/types/boards/board_issue_input_type.rb

@@ -2,14 +2,12 @@
 
 module Types
   module Boards
-    class NegatedBoardIssueInputType < BoardIssueInputBaseType
-    end
-
     class BoardIssueInputType < BoardIssueInputBaseType
       graphql_name 'BoardIssueInput'
 
       argument :not, NegatedBoardIssueInputType,
                required: false,
+               prepare: ->(negated_args, ctx) { negated_args.to_h },
                description: <<~MD
                  List of negated arguments.
                  Warning: this argument is experimental and a subject to change in future.

app/graphql/types/boards/negated_board_issue_input_type.rb

+# frozen_string_literal: true
+
+module Types
+  module Boards
+    class NegatedBoardIssueInputType < BoardIssueInputBaseType
+    end
+  end
+end
+
+Types::Boards::NegatedBoardIssueInputType.prepend_if_ee('::EE::Types::Boards::NegatedBoardIssueInputType')

ee/app/graphql/ee/types/boards/negated_board_issue_input_type.rb

+# frozen_string_literal: true
+
+module EE
+  module Types
+    module Boards
+      module NegatedBoardIssueInputType
+        extend ActiveSupport::Concern
+
+        prepended do
+          argument :iteration_wildcard_id, ::Types::Boards::NegatedIterationWildcardIdEnum,
+                   required: false,
+                   description: 'Filter by iteration ID wildcard.'
+        end
+      end
+    end
+  end
+end

ee/app/graphql/types/boards/negated_iteration_wildcard_id_enum.rb

+# frozen_string_literal: true
+
+module Types
+  module Boards
+    class NegatedIterationWildcardIdEnum < BaseEnum
+      graphql_name 'NegatedIterationWildcardId'
+      description 'Negated Iteration ID wildcard values'
+
+      value 'CURRENT', 'Current iteration.'
+    end
+  end
+end

ee/spec/graphql/ee/resolvers/board_list_issues_resolver_spec.rb

@@ -46,9 +46,11 @@ RSpec.describe Resolvers::BoardListIssuesResolver do
     end
 
     context 'filtering by iteration' do
-      let_it_be(:iteration) { create(:iteration, group: group) }
+      let_it_be(:iteration) { create(:iteration, group: group, start_date: 1.week.ago, due_date: 2.days.ago) }
+      let_it_be(:current_iteration) { create(:iteration, :started, group: group, start_date: Date.today, due_date: 1.day.from_now) }
       let_it_be(:issue_with_iteration) { create(:issue, project: project, labels: [label], iteration: iteration) }
       let_it_be(:issue_without_iteration) { create(:issue, project: project, labels: [label]) }
+      let_it_be(:issue_with_current_iteration) { create(:issue, project: project, labels: [label], iteration: current_iteration) }
 
       it 'accepts iteration title' do
         result = resolve_board_list_issues({ filters: { iteration_title: iteration.title } })
@@ -61,6 +63,14 @@ RSpec.describe Resolvers::BoardListIssuesResolver do
 
         expect(result).to contain_exactly(issue_without_iteration)
       end
+
+      context 'filterning by negated iteration' do
+        it 'accepts iteration wildcard id' do
+          result = resolve_board_list_issues({ filters: { not: { iteration_wildcard_id: 'CURRENT' } } })
+
+          expect(result).to contain_exactly(issue_without_iteration, issue_with_iteration)
+        end
+      end
     end
   end