diff --git a/lib/sf/reg_event.rb b/lib/sf/reg_event.rb
index 544ea9f..1a274bc 100644
--- a/lib/sf/reg_event.rb
+++ b/lib/sf/reg_event.rb
@@ -1,110 +1,110 @@
-class Sf::RegEvent
-  include Sf::Base
-  attr_accessor :reg_event
+# frozen_string_literal: true
 
-  FIELDS = ['Id', 'code__c', 'start_date__c', 'end_date__c', 'max_attendees__c',
-            'early_rate_deadline__c', 'regular_rate_deadline__c', 
-	    'cancellation_deadline__c', 'status__c', 'title__c']
+module Sf
+  class RegEvent
+    include Sf::Base
+    attr_accessor :reg_event
 
-  FIELDS_SELECT_STR = FIELDS.join(', ')
-  def initialize(reg_event=nil)
-    @reg_event = reg_event.nil? ? Restforce::SObject.new(sobject_type: 'RegEvent__c') : reg_event
-  end
-
-  def method_missing(method_name, *args, &block)
-    @reg_event.send(method_name, *args, &block)
-  end
-
-  def respond_to_missing?(method_name, include_private = false)
-    @reg_event.respond_to?(method_name, include_private) || super
-  end
-
-  def update(attrs = {})
-    attrs['Id'] = self.Id
-    Sf.client.update("RegEvent__c", attrs)  
-  end
+    FIELDS = %w[Id code__c start_date__c end_date__c max_attendees__c
+                early_rate_deadline__c regular_rate_deadline__c
+                cancellation_deadline__c status__c title__c].freeze
 
-  def self.find(id)
-    new Sf.client.find("RegEvent__c", id)  
-  end
+    FIELDS_SELECT_STR = FIELDS.join(', ')
+    def initialize(reg_event = nil)
+      @reg_event = reg_event.nil? ? Restforce::SObject.new(sobject_type: 'RegEvent__c') : reg_event
+    end
 
-  def self.find_by_code(code)
-    found_event = where({code__c: code}).first
-    new Sf.client.find("RegEvent__c", found_event.Id) unless found_event.nil?
-  end
+    def method_missing(method_name, *args, &block)
+      @reg_event.send(method_name, *args, &block)
+    end
 
-  def self.where(args = {})
-    where = args.map {|k,v| "#{k} = \'#{v}\'"}.join(" and ")
-    sobjects = Sf.client.query("select #{FIELDS_SELECT_STR} from RegEvent__c where #{where}")
-    build_collection sobjects unless sobjects.blank?
-  end
+    def respond_to_missing?(method_name, include_private = false)
+      @reg_event.respond_to?(method_name, include_private) || super
+    end
 
-  def self.by_codes(codes=[])
-    where = codes.map{|code| "code__c = \'#{code}\'"}.join(" or ")
-    sobjects = Sf.client.query("select #{FIELDS_SELECT_STR} from RegEvent__c where #{where}")
-    build_collection sobjects unless sobjects.blank?
-  end
+    def update(attrs = {})
+      attrs['Id'] = self.Id
+      Sf.client.update('RegEvent__c', attrs)
+    end
 
-  def self.create_from_event(event)
-    return if event.nil? or event.id.nil? or !event.class.eql?(Event)
+    def self.find(id)
+      new Sf.client.find('RegEvent__c', id)
+    end
 
-    # aborts if it is already in SF
-    if !!event.sf_event_id and sf_event = self.find(event.sf_event_id)
-      event.errors.add(:base, "RegEvent with ID #{sf_event.Id} already exists.")
-      return 
+    def self.find_by_code(code)
+      found_event = where({ code__c: code }).first
+      new Sf.client.find('RegEvent__c', found_event.Id) unless found_event.nil?
     end
-    if !!event.code and sf_event = self.find_by_code(event.code) 
-      event.errors.add(:base, "RegEvent with ID #{sf_event.Id} already exists.")
-      return 
+
+    def self.where(args = {})
+      where = args.map { |k, v| "#{k} = \'#{v}\'" }.join(' and ')
+      sobjects = Sf.client.query("select #{FIELDS_SELECT_STR} from RegEvent__c where #{where}")
+      build_collection sobjects unless sobjects.blank?
     end
 
-    attrs = {}
-    self.event_mapping.each do |event_attr, sf_event_attr|
-      reg_event_value = event.send(event_attr)
-      reg_event_value = reg_event_value.iso8601 if reg_event_value.class.eql?(ActiveSupport::TimeWithZone)
-      attrs[sf_event_attr] = reg_event_value unless reg_event_value.nil?
+    def self.by_codes(codes = [])
+      where = codes.map { |code| "code__c = \'#{code}\'" }.join(' or ')
+      sobjects = Sf.client.query("select #{FIELDS_SELECT_STR} from RegEvent__c where #{where}")
+      build_collection sobjects unless sobjects.blank?
     end
-    attrs['Name'] = event.title
-    sf_reg_event_id = Sf.client.create("RegEvent__c", attrs)
-    event.sf_event_id = sf_reg_event_id
-    event.save
-    sf_reg_event = self.find(sf_reg_event_id)
-    self.new sf_reg_event 
-  end
 
-  # updating contact id on all reg_items in the reg event
-  def update_contact_id_in_reg_items
-    rr = 'reg_registration_id__r'
-    sf_reg_items = Sf.client.query("select Id, Contact__c, #{rr}.Id, #{rr}.contact_id__c from RegItem__c where #{rr}.event_code__c = \'#{self.code__c}\'")
-    sf_reg_items.each do |item|
-      next unless item.Contact__c.nil?
-      attrs = {'Id' => item.Id, 'Contact__c' => item.reg_registration_id__r.contact_id__c}
-      Sf.client.update!("RegItem__c", attrs)
+    def self.create_from_event(event)
+      return if event.nil? || event.id.nil? || !event.instance_of?(Event)
+
+      # aborts if it is already in SF
+      if !event.sf_event_id.nil? && (sf_event = find(event.sf_event_id))
+        event.errors.add(:base, "RegEvent with ID #{sf_event.Id} already exists.")
+        return
+      end
+      if !event.code.nil? && (sf_event = find_by_code(event.code))
+        event.errors.add(:base, "RegEvent with ID #{sf_event.Id} already exists.")
+        return
+      end
+
+      attrs = {}
+      event_mapping.each do |event_attr, sf_event_attr|
+        reg_event_value = event.send(event_attr)
+        reg_event_value = reg_event_value.iso8601 if reg_event_value.instance_of?(ActiveSupport::TimeWithZone)
+        attrs[sf_event_attr] = reg_event_value unless reg_event_value.nil?
+      end
+      attrs['Name'] = event.title
+      sf_reg_event_id = Sf.client.create('RegEvent__c', attrs)
+      event.sf_event_id = sf_reg_event_id
+      event.save
+      sf_reg_event = find(sf_reg_event_id)
+      new sf_reg_event
     end
-  end
 
+    # updating contact id on all reg_items in the reg event
+    def update_contact_id_in_reg_items
+      rr = 'reg_registration_id__r'
+      sf_reg_items = Sf.client.query("select Id, Contact__c, #{rr}.Id, #{rr}.contact_id__c from RegItem__c where #{rr}.event_code__c = \'#{code__c}\'")
+      sf_reg_items.each do |item|
+        next unless item.Contact__c.nil?
 
-  private
-
-  def self.event_mapping
-    {
-      'code' => 'code__c',
-      'start_date' => 'start_date__c',
-      'end_date' => 'end_date__c',
-      'early_rate_deadline' => 'early_rate_deadline__c',
-      'regular_rate_deadline' => 'regular_rate_deadline__c',
-      'cancellation_deadline' => 'cancellation_deadline__c',
-      'registration_closes_at' => 'registration_closes_at__c',
-      'registration_opens_at' => 'registration_opens_at__c',
-      'title' => 'title__c',
-      'description' => 'description__c',
-      'max_attendees' => 'max_attendees__c',
-      'event_home_url' => 'event_home_url__c',
-      'status' => 'status__c',
-      'updated_at' => 'updated_at__c',
-      'id' => 'reg_event_id__c'
-    }
-  end
+        attrs = { 'Id' => item.Id, 'Contact__c' => item.reg_registration_id__r.contact_id__c }
+        Sf.client.update!('RegItem__c', attrs)
+      end
+    end
 
+    def self.event_mapping
+      {
+        'code' => 'code__c',
+        'start_date' => 'start_date__c',
+        'end_date' => 'end_date__c',
+        'early_rate_deadline' => 'early_rate_deadline__c',
+        'regular_rate_deadline' => 'regular_rate_deadline__c',
+        'cancellation_deadline' => 'cancellation_deadline__c',
+        'registration_closes_at' => 'registration_closes_at__c',
+        'registration_opens_at' => 'registration_opens_at__c',
+        'title' => 'title__c',
+        'description' => 'description__c',
+        'max_attendees' => 'max_attendees__c',
+        'event_home_url' => 'event_home_url__c',
+        'status' => 'status__c',
+        'updated_at' => 'updated_at__c',
+        'id' => 'reg_event_id__c'
+      }
+    end
+  end
 end
-