1 files changed, 91 insertions, 0 deletions

diff --git a/app/graphql/mutations/boards/issues/issue_move_list.rb b/app/graphql/mutations/boards/issues/issue_move_list.rb
new file mode 100644
index 00000000000..d4bf47af4cf
--- /dev/null
+++ b/app/graphql/mutations/boards/issues/issue_move_list.rb
@@ -0,0 +1,91 @@
+# frozen_string_literal: true
+
+module Mutations
+  module Boards
+    module Issues
+      class IssueMoveList < Mutations::Issues::Base
+        graphql_name 'IssueMoveList'
+
+        argument :board_id, GraphQL::ID_TYPE,
+                  required: true,
+                  loads: Types::BoardType,
+                  description: 'Global ID of the board that the issue is in'
+
+        argument :project_path, GraphQL::ID_TYPE,
+                  required: true,
+                  description: 'Project the issue to mutate is in'
+
+        argument :iid, GraphQL::STRING_TYPE,
+                  required: true,
+                  description: 'IID of the issue to mutate'
+
+        argument :from_list_id, GraphQL::ID_TYPE,
+                  required: false,
+                  description: 'ID of the board list that the issue will be moved from'
+
+        argument :to_list_id, GraphQL::ID_TYPE,
+                  required: false,
+                  description: 'ID of the board list that the issue will be moved to'
+
+        argument :move_before_id, GraphQL::ID_TYPE,
+                  required: false,
+                  description: 'ID of issue before which the current issue will be positioned at'
+
+        argument :move_after_id, GraphQL::ID_TYPE,
+                  required: false,
+                  description: 'ID of issue after which the current issue will be positioned at'
+
+        def ready?(**args)
+          if move_arguments(args).blank?
+            raise Gitlab::Graphql::Errors::ArgumentError,
+                  'At least one of the arguments fromListId, toListId, afterId or beforeId is required'
+          end
+
+          if move_list_arguments(args).one?
+            raise Gitlab::Graphql::Errors::ArgumentError,
+                  'Both fromListId and toListId must be present'
+          end
+
+          super
+        end
+
+        def resolve(board:, **args)
+          raise_resource_not_available_error! unless board
+          authorize_board!(board)
+
+          issue = authorized_find!(project_path: args[:project_path], iid: args[:iid])
+          move_params = { id: issue.id, board_id: board.id }.merge(move_arguments(args))
+
+          move_issue(board, issue, move_params)
+
+          {
+            issue: issue.reset,
+            errors: issue.errors.full_messages
+          }
+        end
+
+        private
+
+        def move_issue(board, issue, move_params)
+          service = ::Boards::Issues::MoveService.new(board.resource_parent, current_user, move_params)
+
+          service.execute(issue)
+        end
+
+        def move_list_arguments(args)
+          args.slice(:from_list_id, :to_list_id)
+        end
+
+        def move_arguments(args)
+          args.slice(:from_list_id, :to_list_id, :move_after_id, :move_before_id)
+        end
+
+        def authorize_board!(board)
+          return if Ability.allowed?(current_user, :read_board, board.resource_parent)
+
+          raise_resource_not_available_error!
+        end
+      end
+    end
+  end
+end