added rubocop linting section with output for reports and clean up

rubocop config

.rubocop.yml

@@ -0,0 +1,6 @@
+AllCops:
+  NewCops: enable
+  SuggestExtensions: false
+
+Metrics/BlockLength:
+    AllowedMethods: ['describe', 'context', 'route', 'r.on', 'r.post']

Gemfile

@@ -1,32 +1,31 @@
 # frozen_string_literal: true
 
-source "https://rubygems.org"
+source 'https://rubygems.org'
 
+gem 'roda', '~> 3.72'
 
-gem "roda", "~> 3.72"
+gem 'sequel', '~> 5.72'
 
-gem "sequel", "~> 5.72"
+gem 'tilt', '~> 2.2'
 
-gem "tilt", "~> 2.2"
+gem 'sqlite3', '~> 1.6'
 
-gem "sqlite3", "~> 1.6"
+gem 'erubi', '~> 1.12'
-
-gem "erubi", "~> 1.12"
 
 group :test do
+  gem 'cucumber', '~> 9.0'
 
-  gem "cucumber", "~> 9.0"
+  gem 'capybara', '~> 3.39'
 
-  gem "capybara", "~> 3.39"
+  gem 'rspec', '~> 3.12'
 
-  gem "rspec", "~> 3.12"
+  gem 'selenium-webdriver', '~> 4.13'
 
-  gem "selenium-webdriver", "~> 4.13"
+  gem 'simplecov'
-
-  gem "simplecov"
 
+  gem 'rubocop', require: false
 end
 
-gem "puma", "~> 6.4"
+gem 'puma', '~> 6.4'
 
-gem "rackup", "~> 2.1"
+gem 'rackup', '~> 2.1'

Gemfile.lock

@@ -3,6 +3,8 @@ GEM
   specs:
     addressable (2.8.5)
       public_suffix (>= 2.0.2, < 6.0)
+    ast (2.4.2)
+    base64 (0.1.1)
     bigdecimal (3.1.4)
     builder (3.2.4)
     capybara (3.39.2)
@@ -42,6 +44,8 @@ GEM
     docile (1.4.0)
     erubi (1.12.0)
     ffi (1.16.2)
+    json (2.6.3)
+    language_server-protocol (3.17.0.3)
     matrix (0.4.2)
     mini_mime (1.1.5)
     mini_portile2 (2.8.4)
@@ -50,6 +54,10 @@ GEM
     nokogiri (1.15.4)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
+    parallel (1.23.0)
+    parser (3.2.2.4)
+      ast (~> 2.4.1)
+      racc
     public_suffix (5.0.3)
     puma (6.4.0)
       nio4r (~> 2.0)
@@ -60,6 +68,7 @@ GEM
     rackup (2.1.0)
       rack (>= 3)
       webrick (~> 1.8)
+    rainbow (3.1.1)
     regexp_parser (2.8.1)
     rexml (3.2.6)
     roda (3.72.0)
@@ -77,6 +86,21 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.1)
+    rubocop (1.57.1)
+      base64 (~> 0.1.1)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.2.2.4)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.28.1, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    ruby-progressbar (1.13.0)
     rubyzip (2.3.2)
     selenium-webdriver (4.13.1)
       rexml (~> 3.2, >= 3.2.5)
@@ -95,6 +119,7 @@ GEM
     sys-uname (1.2.3)
       ffi (~> 1.1)
     tilt (2.3.0)
+    unicode-display_width (2.5.0)
     webrick (1.8.1)
     websocket (1.2.10)
     xpath (3.2.0)
@@ -111,6 +136,7 @@ DEPENDENCIES
   rackup (~> 2.1)
   roda (~> 3.72)
   rspec (~> 3.12)
+  rubocop
   selenium-webdriver (~> 4.13)
   sequel (~> 5.72)
   simplecov

Jenkinsfile

@@ -20,6 +20,9 @@ pipeline {
         sh 'sequel -m db/migrations sqlite://db/${DB_NAME}'
       }
     }
+    stage('Code Linting') {
+      sh 'bundle exec rubocop --format html --out rubocop.html'
+    }
     stage('Run tests') {
       steps {
         catchError(buildResult: 'UNSTABLE', stageResult: 'FAILURE') {
@@ -37,9 +40,9 @@ pipeline {
           alwaysLinkToLastBuild: false,
           keepAll: true,
           reportDir: '.',
-          reportFiles: 'cucumber.html, spec.html, coverage/index.html',
+          reportFiles: 'rubocop.html, cucumber.html, spec.html, coverage/index.html',
           reportName: 'Test Results',
-          reportTitles: 'Cucumber Results, RSpec Results, Test Coverage'])
+          reportTitles: 'Rubocop Results, Cucumber Results, RSpec Results, Test Coverage'])
       }
     }
     stage('Build production deliverable') {
@@ -53,7 +56,7 @@ pipeline {
             cp .env.rb /tmp/url-shortener/
             cp .ruby-version /tmp/url-shortener/
             cd /tmp/url-shortener
-            rm -rf features spec coverage db/*.db .git* Jenkinsfile *.html
+            rm -rf features spec coverage db/*.db .git* Jenkinsfile *.html .rubocop.yml
             cd /tmp
             tar -czvf $ZIP_FILE url-shortener/
             mv /tmp/$ZIP_FILE $CUR_DIR/

app.rb

@@ -1,9 +1,12 @@
+# frozen_string_literal: true
+
 require 'roda'
 require 'securerandom'
 require 'json'
 require 'sequel'
 require 'open-uri'
 
+# URL Shortener App class
 class App < Roda
   plugin :sessions, secret: ENV.delete('APP_SESSION_SECRET')
   plugin :render, escape: true
@@ -11,92 +14,92 @@ class App < Roda
   plugin :json_parser
   plugin :request_headers
 
-  DB = Sequel.sqlite("db/#{ENV['DB_NAME']}")
+  DB = Sequel.sqlite("db/#{ENV.fetch('DB_NAME', nil)}")
   links = DB[:links]
 
   route do |r|
     r.root do
-      @message = flash['message'] || "Enter a URL"
+      @message = flash['message'] || 'Enter a URL'
       view :home
     end
 
     r.get String do |url_code|
-      link = links.filter(:code => url_code)
+      link = links.filter(code: url_code)
       r.redirect link.first[:url] unless link.first.nil?
       @message = "Link #{url_code} doesn't exist"
       response.status = 404
       view :home
     end
 
-    r.post "create" do
+    r.post 'create' do
       url = r.params['url']
-      if url.nil? or url.empty? 
+      if url.nil? || url.empty?
-        flash['message'] = "Please enter a valid URL";
+        flash['message'] = 'Please enter a valid URL'
         r.redirect '/'
       end
 
       begin
         OpenURI.open_uri(url)
       rescue URI::BadURIError
-        flash['message'] = "Invalid URL"
+        flash['message'] = 'Invalid URL'
         r.redirect '/'
       rescue OpenURI::HTTPError
-        flash['message'] = "URL not found"
+        flash['message'] = 'URL not found'
         r.redirect '/'
-      rescue SocketError => e
+      rescue SocketError
-        flash['message'] = "URL does not resolve"
+        flash['message'] = 'URL does not resolve'
         r.redirect '/'
       end
 
-      if links.filter(:url => url).first.nil?
+      if links.filter(url:).first.nil?
         code = SecureRandom.urlsafe_base64 4
-        links.insert(url: url, code: code) 
+        links.insert(url:, code:)
-        @message = "Link created"
+        @message = 'Link created'
       end
-      code = links.filter(:url => url).first[:code]
+      code = links.filter(url:).first[:code]
-      @message ||= "Link exists"
+      @message ||= 'Link exists'
-      @new_link = 'http://' + request.env['HTTP_HOST'] + '/' + code
+      @new_link = "http://#{request.env['HTTP_HOST']}/#{code}"
       view :create
     end
-    r.on "links" do
+    r.on 'links' do
       r.post do
-        if 'application/json' != r.headers['CONTENT_TYPE']
+        if r.headers['CONTENT_TYPE'] != 'application/json'
           response.status = 400
-          return {message: "not a valid json request"}.to_json
+          return { message: 'not a valid json request' }.to_json
         end
 
         url = r.params['url']
         if url.nil?
           response.status = 400
-          return {message: "missing url parameter"}.to_json
+          return { message: 'missing url parameter' }.to_json
         end
 
         if url.empty?
           response.status = 400
-          return {message: "invalid url parameter"}.to_json
+          return { message: 'invalid url parameter' }.to_json
         end
 
         begin
           OpenURI.open_uri(url)
         rescue URI::BadURIError
           response.status = 400
-          return {message: "invalid url parameter"}.to_json
+          return { message: 'invalid url parameter' }.to_json
         rescue OpenURI::HTTPError
           response.status = 400
-          return {message: "url not found"}.to_json
+          return { message: 'url not found' }.to_json
-        rescue SocketError => e
+        rescue SocketError
           response.status = 400
-          return {message: "url does not resolve"}.to_json
+          return { message: 'url does not resolve' }.to_json
         end
 
-        if links.filter(:url => url).first.nil?
+        if links.filter(url:).first.nil?
           code = SecureRandom.urlsafe_base64 4
-          links.insert(url: url, code: code) 
+          links.insert(url:, code:)
         end
 
-        code = links.filter(:url => url).first[:code]
+        code = links.filter(url:).first[:code]
-        @new_link = 'http://' + request.env['HTTP_HOST'] + '/' + code
+        @new_link = "http://#{request.env['HTTP_HOST']}/#{code}"
-        return {url: url, code: code, link: @new_link}.to_json
+        return { url:, code:, link: @new_link }.to_json
       end
     end
   end

config.ru

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require './.env'
 require './app'
 

db/migrations/001_create_links_table.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Sequel.migration do
   change do
     create_table :links do

features/step_definitions/steps.rb

@@ -1,9 +1,10 @@
+# frozen_string_literal: true
+
 # BEFORE
 Before('@db-test') do
-  @links = Sequel.sqlite("db/#{ENV['DB_NAME']}")[:links]
+  @links = Sequel.sqlite("db/#{ENV.fetch('DB_NAME', nil)}")[:links]
 end
 
-
 # GIVEN
 
 Given('I visit the {string} page') do |string|
@@ -11,14 +12,13 @@ Given('I visit the {string} page') do |string|
 end
 
 Given('A link already exists with the url {string}') do |string|
-  @links.insert(url: string, code: "aaaaaa")
+  @links.insert(url: string, code: 'aaaaaa')
 end
 
 Given('A link already exists with the url {string} and code {string}') do |url, code|
-  @links.insert(url: url, code: code)
+  @links.insert(url:, code:)
 end
 
-
 # WHEN
 
 When('I click the {string} button') do |string|
@@ -33,7 +33,6 @@ When('I visit the {string} location') do |string|
   visit string
 end
 
-
 # THEN
 
 Then('I should see text {string}') do |string|
@@ -66,7 +65,6 @@ Then('The status code should be {int}') do |code|
   page.status_code.should eq(code)
 end
 
-
 # AFTER
 
 After('@db-test') do

features/support/env.rb

@@ -1,25 +1,27 @@
+# frozen_string_literal: true
+
 require 'simplecov'
 SimpleCov.start
 
 require_relative '../../.env'
-ENV["DB_NAME"] = "test_#{ENV["DB_NAME"]}"
+ENV['DB_NAME'] = "test_#{ENV.fetch('DB_NAME', nil)}"
 require_relative '../../app'
 require 'rubygems'
 require 'roda'
 require 'sequel'
 require 'capybara'
 require 'capybara/dsl'
+require 'capybara/cucumber'
 require 'rspec'
+###
+require 'rspec/expectations'
+require 'rspec/matchers'
 
 # DB initialization
 Sequel.extension :migration
-Sequel.sqlite("db/#{ENV['DB_NAME']}") do |db|
+Sequel.sqlite("db/#{ENV.fetch('DB_NAME', nil)}") do |db|
-  Sequel::Migrator.apply(db, "db/migrations")
+  Sequel::Migrator.apply(db, 'db/migrations')
 end
 
 # attach app to Capybara
 Capybara.app = App
-
-include Capybara::DSL
-include RSpec::Expectations
-include RSpec::Matchers

spec/create_spec.rb

@@ -1,8 +1,10 @@
+# frozen_string_literal: true
+
 require 'simplecov'
 SimpleCov.start
 
 require_relative '../.env'
-ENV["DB_NAME"] = "test_#{ENV["DB_NAME"]}"
+ENV['DB_NAME'] = "test_#{ENV.fetch('DB_NAME', nil)}"
 require_relative '../app'
 require 'rubygems'
 require 'roda'
@@ -12,27 +14,27 @@ require 'rack/test'
 
 # DB initialization
 Sequel.extension :migration
-Sequel.sqlite("db/#{ENV['DB_NAME']}") do |db|
+Sequel.sqlite("db/#{ENV.fetch('DB_NAME', nil)}") do |db|
-  Sequel::Migrator.apply(db, "db/migrations")
+  Sequel::Migrator.apply(db, 'db/migrations')
 end
 
 def app
   App
 end
 
-describe "Submit API request to create new link" do
+describe 'Submit API request to create new link' do
   include Rack::Test::Methods
   before :each do
-    @links = Sequel.sqlite("db/#{ENV['DB_NAME']}")[:links]
+    @links = Sequel.sqlite("db/#{ENV.fetch('DB_NAME', nil)}")[:links]
   end
   after :each do
     @links.delete
   end
-  it "should return link data in json format when a valid url is submitted" do
+  it 'should return link data in json format when a valid url is submitted' do
     data = {
       url: 'http://google.com'
     }
-    post('/links', data.to_json, "CONTENT_TYPE" => "application/json")
+    post('/links', data.to_json, 'CONTENT_TYPE' => 'application/json')
     expect(last_response).to be_ok
     response_json = JSON.parse(last_response.body)
     expect(response_json['url']).to eq(data[:url])
@@ -44,16 +46,15 @@ describe "Submit API request to create new link" do
     data = {
       url: ''
     }
-    post('/links', data.to_json, "CONTENT_TYPE" => "application/json")
+    post('/links', data.to_json, 'CONTENT_TYPE' => 'application/json')
     expect(last_response.status).to eq(400)
     response_json = JSON.parse(last_response.body)
     expect(response_json['message']).to eq('invalid url parameter')
   end
 
   it "should return with a 400 status and 'missing url parameter' message when an empty url is submitted" do
-    data = {
+    data = {}
-    }
+    post('/links', data.to_json, 'CONTENT_TYPE' => 'application/json')
-    post('/links', data.to_json, "CONTENT_TYPE" => "application/json")
     expect(last_response.status).to eq(400)
     response_json = JSON.parse(last_response.body)
     expect(response_json['message']).to eq('missing url parameter')
@@ -63,7 +64,7 @@ describe "Submit API request to create new link" do
     data = {
       url: 'not-an-url'
     }
-    post('/links', data.to_json, "CONTENT_TYPE" => "application/json")
+    post('/links', data.to_json, 'CONTENT_TYPE' => 'application/json')
     expect(last_response.status).to eq(400)
     response_json = JSON.parse(last_response.body)
     expect(response_json['message']).to eq('invalid url parameter')
@@ -73,7 +74,7 @@ describe "Submit API request to create new link" do
     data = {
       url: 'http://google.com/example'
     }
-    post('/links', data.to_json, "CONTENT_TYPE" => "application/json")
+    post('/links', data.to_json, 'CONTENT_TYPE' => 'application/json')
     expect(last_response.status).to eq(400)
     response_json = JSON.parse(last_response.body)
     expect(response_json['message']).to eq('url not found')
@@ -83,13 +84,14 @@ describe "Submit API request to create new link" do
     data = {
       url: 'http://bad.tld'
     }
-    post('/links', data.to_json, "CONTENT_TYPE" => "application/json")
+    post('/links', data.to_json, 'CONTENT_TYPE' => 'application/json')
     expect(last_response.status).to eq(400)
     response_json = JSON.parse(last_response.body)
     expect(response_json['message']).to eq('url does not resolve')
   end
 
-  it "should return with a 400 status and 'not a valid json request' message when a request is made with the wrong content type header" do
+  it "should return with a 400 status and 'not a valid json request'
+      message when a request is made with the wrong content type header" do
     data = {
       url: 'http://google.com'
     }