Backport API::Issues parameters from EE

This backports the parameters that EE adds to API::Issues, and wraps
them in conditionals so they are only used in EE.

lib/api/helpers/issues_helpers.rb

+# frozen_string_literal: true
+
+module API
+  module Helpers
+    module IssuesHelpers
+      def self.update_params_at_least_one_of
+        [
+          :assignee_id,
+          :assignee_ids,
+          :confidential,
+          :created_at,
+          :description,
+          :discussion_locked,
+          :due_date,
+          :labels,
+          :milestone_id,
+          :state_event,
+          :title
+        ]
+      end
+    end
+  end
+end

lib/api/issues.rb

@@ -8,15 +8,6 @@ module API
 
     helpers ::Gitlab::IssuableMetadata
 
-    # EE::API::Issues would override the following helpers
-    helpers do
-      params :issues_params_ee do
-      end
-
-      params :issue_params_ee do
-      end
-    end
-
     helpers do
       # rubocop: disable CodeReuse/ActiveRecord
       def find_issues(args = {})
@@ -33,6 +24,16 @@ module API
       end
       # rubocop: enable CodeReuse/ActiveRecord
 
+      if Gitlab.ee?
+        params :issues_params_ee do
+          optional :weight, types: [Integer, String], integer_none_any: true, desc: 'The weight of the issue'
+        end
+
+        params :issue_params_ee do
+          optional :weight, type: Integer, desc: 'The weight of the issue'
+        end
+      end
+
       params :issues_params do
         optional :labels, type: Array[String], coerce_with: Validations::Types::LabelsList.coerce, desc: 'Comma-separated list of label names'
         optional :milestone, type: String, desc: 'Milestone title'
@@ -57,7 +58,7 @@ module API
         optional :confidential, type: Boolean, desc: 'Filter confidential or public issues'
         use :pagination
 
-        use :issues_params_ee
+        use :issues_params_ee if Gitlab.ee?
       end
 
       params :issue_params do
@@ -70,7 +71,7 @@ module API
         optional :confidential, type: Boolean, desc: 'Boolean parameter if the issue should be confidential'
         optional :discussion_locked, type: Boolean, desc: " Boolean parameter indicating if the issue's discussion is locked"
 
-        use :issue_params_ee
+        use :issue_params_ee if Gitlab.ee?
       end
     end
 
@@ -219,8 +220,8 @@ module API
                               desc: 'Date time when the issue was updated. Available only for admins and project owners.'
         optional :state_event, type: String, values: %w[reopen close], desc: 'State of the issue'
         use :issue_params
-        at_least_one_of :title, :description, :assignee_ids, :assignee_id, :milestone_id, :discussion_locked,
-                        :labels, :created_at, :due_date, :confidential, :state_event
+
+        at_least_one_of(*Helpers::IssuesHelpers.update_params_at_least_one_of)
       end
       # rubocop: disable CodeReuse/ActiveRecord
       put ':id/issues/:issue_iid' do