Auto correct rubocop errors

.rubocop.yml

@@ -1 +1,47 @@
-inherit_from: .rubocop_todo.yml
+require:
+  - rubocop-rails
+  - ./lib/rubocop/init_autoloader
+
+AllCops:
+  TargetRubyVersion: 3.3.0
+  Exclude:
+    - "spec/**/*.rb"
+    - "db/**/*"
+    - "config/**/*"
+    - "bin/**/*"
+###################
+#   Custom Cops   #
+###################
+Custom/PrivateMethodStyle:
+  Enabled: true
+###################
+# End Custom Cops #
+###################
+Layout/IndentationWidth:
+  Enabled: true
+  Width: 2
+Lint/UnusedMethodArgument:
+  AutoCorrect: false
+Metrics/AbcSize:
+  Exclude:
+    - "lib/mixins/**/*"
+Metrics/CyclomaticComplexity:
+  Exclude:
+    - "lib/rubocop/cop/custom/*.rb"
+Metrics/MethodLength:
+  Exclude:
+    - "lib/rubocop/cop/custom/*.rb"
+    - "lib/mixins/**/*"
+Metrics/PerceivedComplexity:
+  Exclude:
+    - "lib/rubocop/cop/custom/*.rb"
+Style/AccessModifierDeclarations:
+  EnforcedStyle: inline
+Style/Documentation:
+  Enabled: false
+Style/Lambda:
+  EnforcedStyle: literal
+Style/RedundantArgument:
+  AutoCorrect: false
+Style/StringLiterals:
+  EnforcedStyle: double_quotes

Gemfile

@@ -1,15 +1,17 @@
-source 'https://rubygems.org'
+# frozen_string_literal: true
 
-ruby '3.3.0'
+source "https://rubygems.org"
+
+ruby "3.3.0"
 
 # Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
-gem 'rails', '~> 7.1.3', '>= 7.1.3.4'
+gem "rails", "~> 7.1.3", ">= 7.1.3.4"
 
 # Use postgresql as the database for Active Record
-gem 'pg', '~> 1.1'
+gem "pg", "~> 1.1"
 
 # Use the Puma web server [https://github.com/puma/puma]
-gem 'puma', '>= 5.0'
+gem "puma", ">= 5.0"
 
 # Build JSON APIs with ease [https://github.com/rails/jbuilder]
 # gem "jbuilder"
@@ -24,14 +26,15 @@ gem 'puma', '>= 5.0'
 # gem "bcrypt", "~> 3.1.7"
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-gem 'rubocop', require: false
-gem 'tzinfo-data', platforms: %i[windows jruby]
+gem "rubocop", require: false
+gem "rubocop-rails", require: false
+gem "tzinfo-data", platforms: %i[windows jruby]
 
 # Reduces boot times through caching; required in config/boot.rb
-gem 'bootsnap', require: false
-gem 'database_cleaner'
-gem 'faraday'
-gem 'figaro'
+gem "bootsnap", require: false
+gem "database_cleaner"
+gem "faraday"
+gem "figaro"
 # Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
 # gem "image_processing", "~> 1.2"
 
@@ -40,13 +43,13 @@ gem 'figaro'
 
 group :development, :test do
   # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
-  gem 'debug', platforms: %i[mri windows]
-  gem 'factory_bot_rails', '~> 4.0'
-  gem 'pry-rails'
-  gem 'rspec-rails'
-  gem 'shoulda-matchers'
-  gem 'vcr'
-  gem 'webmock'
+  gem "debug", platforms: %i[mri windows]
+  gem "factory_bot_rails", "~> 4.0"
+  gem "pry-rails"
+  gem "rspec-rails"
+  gem "shoulda-matchers"
+  gem "vcr"
+  gem "webmock"
 end
 
 group :development do

Gemfile.lock

@@ -255,6 +255,11 @@ GEM
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.31.3)
       parser (>= 3.3.1.0)
+    rubocop-rails (2.24.1)
+      activesupport (>= 4.2.0)
+      rack (>= 1.1)
+      rubocop (>= 1.33.0, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
     ruby-progressbar (1.13.0)
     shoulda-matchers (6.2.0)
       activesupport (>= 5.2.0)
@@ -298,6 +303,7 @@ DEPENDENCIES
   rails (~> 7.1.3, >= 7.1.3.4)
   rspec-rails
   rubocop
+  rubocop-rails
   shoulda-matchers
   tzinfo-data
   vcr

Rakefile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 

app/channels/application_cable/channel.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationCable
   class Channel < ActionCable::Channel::Base
   end

app/channels/application_cable/connection.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationCable
   class Connection < ActionCable::Connection::Base
   end

app/controllers/application_controller.rb

@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 class ApplicationController < ActionController::API
 end

app/jobs/application_job.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationJob < ActiveJob::Base
   # Automatically retry jobs that encountered a deadlock
   # retry_on ActiveRecord::Deadlocked

app/mailers/application_mailer.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationMailer < ActionMailer::Base
   default from: "from@example.com"
   layout "mailer"

app/models/application_record.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationRecord < ActiveRecord::Base
   primary_abstract_class
 end

config.ru

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file is used by Rack-based servers to start the application.
 
 require_relative "config/environment"

config/environments/development.rb

@@ -68,4 +68,12 @@
 
   # Raise error when a before_action's only/except options reference missing actions
   config.action_controller.raise_on_missing_callback_actions = true
+
+  config.generators.after_generate do |files|
+    parsable_files = files.filter { |file| file.end_with?('.rb') }
+    unless parsable_files.empty?
+      system("bundle exec rubocop -A --fail-level=E #{parsable_files.shelljoin}", exception: true)
+    end
+  end
+
 end

lib/rubocop/cop/custom/private_method_style.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+# typed: false
+
+require "rubocop"
+
+module RuboCop
+  module Cop
+    module Custom
+      # This cop enforces that private methods are defined using
+      # `private def` for instance methods or
+      # `private_class_method def self` for class methods.
+      class PrivateMethodStyle < Base
+        MSG_INSTANCE = "Use `private def` for instance methods."
+        MSG_CLASS = "Use `private_class_method def self` for class methods."
+
+        def on_def(node)
+          method_name = node.children[0]&.to_s
+
+          return unless class_method_definition?(node)
+
+          Rails.logger.debug "Checking method: #{method_name}"
+          add_offense(node, message: MSG_CLASS)
+        end
+
+        private def class_method_definition?(node)
+          node.defs_type? && node.children[0]&.to_s == "self.use_collection"
+        end
+
+        private def instance_method?(node)
+          return false unless node.def_type?
+
+          method_name, _args, _body = *node
+          method_name.to_s.start_with?("def") && !node.singleton_method?
+        end
+
+        private def class_method?(node)
+          return false unless node.defs_type?
+
+          _scope, method_name, _args, _body = *node
+          method_name.to_s.start_with?("self.") && !node.arguments? && !node.singleton_method?
+        end
+      end
+    end
+  end
+end

lib/rubocop/init_autoloader.rb

@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+
+# Load all Ruby files in the custom directory
+Dir[File.join(__dir__, "**/*.rb")].each { |file| require file }

lib/tasks/rubcop_require.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+require "rubocop/rake_task"
+
+RuboCop::RakeTask.new do |task|
+  task.requires << "rubocop-rails"
+end