1 files changed, 56 insertions, 0 deletions
diff --git a/rubocop/cop/code_reuse/worker.rb b/rubocop/cop/code_reuse/worker.rb
new file mode 100644
index 00000000000..e38d2783d0f
--- /dev/null
+++ b/rubocop/cop/code_reuse/worker.rb
@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+require_relative '../../code_reuse_helpers.rb'
+
+module RuboCop
+  module Cop
+    module CodeReuse
+      # Cop that enforces various code reuse rules for workers.
+      class Worker < RuboCop::Cop::Cop
+        include CodeReuseHelpers
+
+        IN_CONTROLLER = 'Workers can not be used in a controller.'
+        IN_API = 'Workers can not be used in a Grape API.'
+        IN_FINDER = 'Workers can not be used in a Finder.'
+        IN_PRESENTER = 'Workers can not be used in a Presenter.'
+        IN_SERIALIZER = 'Workers can not be used in a Serializer.'
+
+        IN_MODEL_CLASS_METHOD =
+          'Workers can not be used in model class methods.'
+
+        SUFFIX = 'Worker'
+
+        def on_class(node)
+          if in_model?(node)
+            check_model_class_methods(node)
+          else
+            check_all_send_nodes(node)
+          end
+        end
+
+        def check_all_send_nodes(node)
+          message =
+            if in_controller?(node)
+              IN_CONTROLLER
+            elsif in_api?(node)
+              IN_API
+            elsif in_finder?(node)
+              IN_FINDER
+            elsif in_presenter?(node)
+              IN_PRESENTER
+            elsif in_serializer?(node)
+              IN_SERIALIZER
+            end
+
+          disallow_send_to(node, SUFFIX, message) if message
+        end
+
+        def check_model_class_methods(node)
+          each_class_method(node) do |def_node|
+            disallow_send_to(def_node, SUFFIX, IN_MODEL_CLASS_METHOD)
+          end
+        end
+      end
+    end
+  end
+end