1 files changed, 29 insertions, 0 deletions
diff --git a/rubocop/routes_under_scope.rb b/rubocop/routes_under_scope.rb
new file mode 100644
index 00000000000..3f049bb09fa
--- /dev/null
+++ b/rubocop/routes_under_scope.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module RuboCop
+  # Common code used to implement cops checking routes outside of /-/ scope.
+  #
+  # Examples:
+  # * RuboCop::Cop::PutProjectRoutesUnderScope
+  # * RuboCop::Cop::PutGroupRoutesUnderScope
+  module RoutesUnderScope
+    ROUTE_METHODS = Set.new(%i[resource resources get post put patch delete]).freeze
+
+    def on_send(node)
+      return unless route_method?(node)
+      return unless outside_scope?(node)
+
+      add_offense(node)
+    end
+
+    def outside_scope?(node)
+      node.each_ancestor(:block).none? do |parent|
+        dash_scope?(parent.to_a.first)
+      end
+    end
+
+    def route_method?(node)
+      ROUTE_METHODS.include?(node.method_name)
+    end
+  end
+end