Updated rubocop and fixed issues (#490)

Gemfile

@@ -76,7 +76,7 @@ group :production do
 end
 
 # Ruby linting.
-gem 'rubocop', '0.57.1'
+gem 'rubocop'
 
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console

Gemfile.lock

@@ -179,7 +179,6 @@ GEM
       ast (~> 2.4.0)
     pg (0.21.0)
     popper_js (1.14.5)
-    powerpack (0.1.2)
     public_suffix (3.0.3)
     puma (3.11.4)
     pyu-ruby-sasl (0.0.3.3)
@@ -244,14 +243,13 @@ GEM
       rspec-mocks (~> 3.7.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.1)
-    rubocop (0.57.1)
+    rubocop (0.68.1)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
-      parser (>= 2.5)
-      powerpack (~> 0.1)
+      parser (>= 2.5, != 2.5.1.1)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.0, >= 1.0.1)
+      unicode-display_width (>= 1.4.0, < 1.6)
     ruby-progressbar (1.10.0)
     rubyntlm (0.6.2)
     safe_yaml (1.0.4)
@@ -364,7 +362,7 @@ DEPENDENCIES
   redis (~> 3.0)
   remote_syslog_logger
   rspec-rails (~> 3.7)
-  rubocop (= 0.57.1)
+  rubocop
   sass-rails (~> 5.0)
   shoulda-matchers (~> 3.1)
   spring

app/controllers/password_resets_controller.rb

@@ -75,9 +75,7 @@ class PasswordResetsController < ApplicationController
 
   # Checks expiration of reset token.
   def check_expiration
-    if current_user.password_reset_expired?
-      redirect_to new_password_reset_url, alert: I18n.t("expired_reset_token")
-    end
+    redirect_to new_password_reset_url, alert: I18n.t("expired_reset_token") if current_user.password_reset_expired?
   end
 
   def reset_link

app/controllers/rooms_controller.rb

@@ -144,8 +144,8 @@ class RoomsController < ApplicationController
 
     begin
       redirect_to @room.join_path(current_user.name, opts, current_user.uid)
-    rescue BigBlueButton::BigBlueButtonException => exc
-      redirect_to room_path, alert: I18n.t(exc.key.to_s.underscore, default: I18n.t("bigbluebutton_exception"))
+    rescue BigBlueButton::BigBlueButtonException => e
+      redirect_to room_path, alert: I18n.t(e.key.to_s.underscore, default: I18n.t("bigbluebutton_exception"))
     end
 
     # Notify users that the room has started.
@@ -192,7 +192,7 @@ class RoomsController < ApplicationController
 
   def create_room_settings_string(mute_res, client_res)
     room_settings = {}
-    room_settings["muteOnStart"] = mute_res == "1" ? true : false
+    room_settings["muteOnStart"] = mute_res == "1"
 
     if client_res.eql? "html5"
       room_settings["joinViaHtml5"] = true

app/helpers/application_helper.rb

@@ -84,8 +84,8 @@ module ApplicationHelper
     begin
       provider_info = retrieve_provider_info(@user_domain, 'api2', 'getUserGreenlightCredentials')
       provider_info['provider'] == 'greenlight'
-    rescue => ex
-      logger.info ex
+    rescue => e
+      logger.info e
       false
     end
   end

app/helpers/recordings_helper.rb

@@ -31,7 +31,7 @@ module RecordingsHelper
     len = valid_playbacks.first[:length]
     if len > 60
       "#{(len / 60).to_i} hrs #{len % 60} mins"
-    elsif len == 0
+    elsif len.zero?
       "< 1 min"
     else
       "#{len} min"

app/helpers/sessions_helper.rb

@@ -60,22 +60,20 @@ module SessionsHelper
 
   def generate_checksum(user_domain, redirect_url, secret)
     string = user_domain + redirect_url + secret
-    OpenSSL::Digest.digest('sha1', string).unpack("H*").first
+    OpenSSL::Digest.digest('sha1', string).unpack1("H*")
   end
 
   def parse_user_domain(hostname)
     return hostname.split('.').first if Rails.configuration.url_host.empty?
     Rails.configuration.url_host.split(',').each do |url_host|
-      if hostname.include?(url_host)
-        return hostname.chomp(url_host).chomp('.')
-      end
+      return hostname.chomp(url_host).chomp('.') if hostname.include?(url_host)
     end
     ''
   end
 
   def omniauth_options(env)
     gl_redirect_url = (Rails.env.production? ? "https" : env["rack.url_scheme"]) + "://" + env["SERVER_NAME"] + ":" +
-        env["SERVER_PORT"]
+                      env["SERVER_PORT"]
     user_domain = parse_user_domain(env["SERVER_NAME"])
     env['omniauth.strategy'].options[:customer] = user_domain
     env['omniauth.strategy'].options[:gl_redirect_url] = gl_redirect_url

app/models/room.rb

@@ -67,9 +67,9 @@ class Room < ApplicationRecord
       unless meeting[:messageKey] == 'duplicateWarning'
         update_attributes(sessions: sessions + 1, last_session: DateTime.now)
       end
-    rescue BigBlueButton::BigBlueButtonException => exc
-      puts "BigBlueButton failed on create: #{exc.key}: #{exc.message}"
-      raise exc
+    rescue BigBlueButton::BigBlueButtonException => e
+      puts "BigBlueButton failed on create: #{e.key}: #{e.message}"
+      raise e
     end
   end
 

app/models/user.rb

@@ -225,7 +225,7 @@ class User < ApplicationRecord
 
   # Initializes a room for the user and assign a BigBlueButton user id.
   def initialize_main_room
-    self.uid = "gl-#{(0...12).map { (65 + rand(26)).chr }.join.downcase}"
+    self.uid = "gl-#{(0...12).map { rand(65..90).chr }.join.downcase}"
     self.main_room = Room.create!(owner: self, name: I18n.t("home_room"))
     save
   end

config/application.rb

@@ -101,6 +101,6 @@ module Greenlight
     config.room_features = ENV['ROOM_FEATURES'] || ""
 
     # The maximum number of rooms included in one bbbapi call
-    config.pagination_number = ENV['PAGINATION_NUMBER'].to_i == 0 ? 25 : ENV['PAGINATION_NUMBER'].to_i
+    config.pagination_number = ENV['PAGINATION_NUMBER'].to_i.zero? ? 25 : ENV['PAGINATION_NUMBER'].to_i
   end
 end

config/environments/production.rb

@@ -113,7 +113,5 @@ Rails.application.configure do
   config.active_record.dump_schema_after_migration = false
 
   # Set the relative url root for deployment to a subdirectory.
-  if ENV['RELATIVE_URL_ROOT'] != "/"
-    config.relative_url_root = ENV['RELATIVE_URL_ROOT'] || "/b"
-  end
+  config.relative_url_root = ENV['RELATIVE_URL_ROOT'] || "/b" if ENV['RELATIVE_URL_ROOT'] != "/"
 end

lib/bbb_api.rb

@@ -64,7 +64,7 @@ module BbbApi
   def encode_bbb_url(base_url, secret, params, route = 'getUser')
     encoded_params = params.to_param
     string = route + encoded_params + secret
-    checksum = OpenSSL::Digest.digest('sha1', string).unpack('H*').first
+    checksum = OpenSSL::Digest.digest('sha1', string).unpack1('H*')
 
     URI.parse("#{base_url}#{route}?#{encoded_params}&checksum=#{checksum}")
   end

lib/tasks/configuration.rake

@@ -12,9 +12,7 @@ namespace :conf do
     # Initial check that variables are set
     print "\nChecking environment"
     ENV_VARIABLES.each do |var|
-      if ENV[var].blank?
-        failed("#{var} not set correctly")
-      end
+      failed("#{var} not set correctly") if ENV[var].blank?
     end
     passed
 
@@ -48,8 +46,8 @@ def test_smtp
     ENV['SMTP_AUTH']) do |s|
     s.sendmail('test', ENV['SMTP_USERNAME'], 'notifications@example.com')
   end
-rescue => exc
-  failed("Error connecting to SMTP - #{exc}")
+rescue => e
+  failed("Error connecting to SMTP - #{e}")
 end
 
 # Takes the full URL including the protocol
@@ -58,11 +56,9 @@ def test_request(url)
   res = Net::HTTP.get(uri)
 
   doc = Nokogiri::XML(res)
-  if doc.css("returncode").text != "SUCCESS"
-    failed("Could not get a valid response from BigBlueButton server - #{res}")
-  end
-rescue => exc
-  failed("Error connecting to BigBlueButton server - #{exc}")
+  failed("Could not get a valid response from BigBlueButton server - #{res}") if doc.css("returncode").text != "SUCCESS"
+rescue => e
+  failed("Error connecting to BigBlueButton server - #{e}")
 end
 
 def failed(msg)

spec/models/room_spec.rb

@@ -102,7 +102,7 @@ describe Room, type: :model do
       query = fullname + meeting_id + password
       checksum_string = "join#{query + secret}"
 
-      checksum = OpenSSL::Digest.digest('sha1', checksum_string).unpack("H*").first
+      checksum = OpenSSL::Digest.digest('sha1', checksum_string).unpack1("H*")
       expect(@room.join_path("Example")).to eql("#{endpoint}join?#{query}&checksum=#{checksum}")
     end
   end