Migrate ToCsv module to CsvGenerator service

app/controllers/admin/account_activities_controller.rb

@@ -35,7 +35,7 @@ module Admin
       respond_to do |format|
         format.html
         format.csv do
-          send_data @q.result.to_csv, filename: "account_activities_#{Time.zone.now.to_formatted_s(:number)}.csv"
+          send_data CsvGenerator.generate_csv(@q.result), filename: "account_activities_#{Time.zone.now.to_formatted_s(:number)}.csv"
         end
       end
 

app/controllers/registrar/account_activities_controller.rb

@@ -20,7 +20,7 @@ class Registrar
       respond_to do |format|
         format.html { @account_activities = @q.result.page(params[:page]) }
         format.csv do
-          send_data @q.result.to_csv, filename: "account_activities_#{Time.zone.now.to_formatted_s(:number)}.csv"
+          send_data CsvGenerator.generate_csv(@q.result), filename: "account_activities_#{Time.zone.now.to_formatted_s(:number)}.csv"
         end
       end
 

app/controllers/registrar/contacts_controller.rb

@@ -40,7 +40,7 @@ class Registrar
           @contacts = @contacts.per(contacts_per_page) if contacts_per_page.positive?
         end
         format.csv do
-          raw_csv = contacts.to_csv
+          raw_csv = CsvGenerator.generate_csv(contacts)
           send_data raw_csv, filename: 'contacts.csv', type: "#{Mime[:csv]}; charset=utf-8"
         end
         format.pdf do

app/lib/to_csv.rb

@@ -1,10 +0,0 @@
-module ToCsv
-  def to_csv
-    CSV.generate do |csv|
-      csv << column_names
-      all.find_each do |item|
-        csv << item.attributes.values_at(*column_names)
-      end
-    end
-  end
-end

app/models/account.rb

@@ -1,5 +1,4 @@
 class Account < ApplicationRecord
-  extend ToCsv
   include Versions
 
   belongs_to :registrar, required: true

app/models/api_log/epp_log.rb

@@ -1,5 +1,3 @@
 module ApiLog
-  class EppLog < Db
-    extend ToCsv
-  end
+  class EppLog < Db; end
 end

app/models/api_log/repp_log.rb

@@ -1,5 +1,3 @@
 module ApiLog
-  class ReppLog < Db
-    extend ToCsv
-  end
+  class ReppLog < Db; end
 end

app/models/blocked_domain.rb

@@ -1,6 +1,5 @@
 class BlockedDomain < ApplicationRecord
   include Versions
-  extend ToCsv
   before_save   :generate_data
   after_destroy :remove_data
 

app/models/contact.rb

@@ -188,15 +188,6 @@ class Contact < ApplicationRecord
       ]
     end
 
-    def to_csv
-      CSV.generate do |csv|
-        csv << column_names
-        all.each do |contact|
-        csv << contact.attributes.values_at(*column_names)
-        end
-      end
-    end
-
     def pdf(html)
       kit = PDFKit.new(html)
       kit.to_pdf

app/models/dispute.rb

@@ -1,5 +1,4 @@
 class Dispute < ApplicationRecord
-  extend ToCsv
   include WhoisStatusPopulate
   validates :domain_name, :password, :starts_at, :expires_at, presence: true
   before_validation :fill_empty_passwords, :set_expiry_date

app/models/domain.rb

@@ -289,21 +289,6 @@ class Domain < ApplicationRecord
       )
     end
 
-    def to_csv
-      CSV.generate do |csv|
-        headers = column_names.dup
-        swap_elements(headers, [[0, 1], [1, 5]])
-        headers[0] = 'Domain'
-        headers[1] = headers[1].humanize
-        csv << headers
-        all.find_each do |item|
-          row = item.attributes.values_at(*column_names)
-          swap_elements(row, [[0, 1], [1, 5]])
-          csv << row
-        end
-      end
-    end
-
     private
 
     def registrant_user_domains_by_registrant(registrant_user)

app/models/invoice.rb

@@ -3,7 +3,6 @@ class Invoice < ApplicationRecord
   include Invoice::Cancellable
   include Invoice::Payable
   include Invoice::BookKeeping
-  extend ToCsv
 
   belongs_to :buyer, class_name: 'Registrar'
   has_one  :account_activity

app/models/reserved_domain.rb

@@ -1,5 +1,4 @@
 class ReservedDomain < ApplicationRecord
-  extend ToCsv
   include Versions # version/reserved_domain_version.rb
   include WhoisStatusPopulate
   before_save :fill_empty_passwords

app/models/version/contact_version.rb

@@ -1,5 +1,4 @@
 class Version::ContactVersion < PaperTrail::Version
-  extend ToCsv
   include VersionSession
 
   self.table_name    = :log_contacts

app/models/version/domain_version.rb

@@ -1,5 +1,4 @@
 class Version::DomainVersion < PaperTrail::Version
-  extend ToCsv
   include VersionSession
 
   self.table_name    = :log_domains

app/services/csv_generator.rb

@@ -1,15 +1,34 @@
 class CsvGenerator
-  def self.generate_csv(objects)
-    class_name = objects.first.class
-    return objects.to_csv unless custom_csv?(class_name)
+  class << self
+    def generate_csv(objects)
+      @class_name = objects.first.class
+      return default_generation(objects) unless custom_csv?
 
       CSV.generate do |csv|
-      csv << class_name.csv_header
+        csv << @class_name.csv_header
         objects.each { |object| csv << object.as_csv_row }
       end
     end
 
-  def self.custom_csv?(class_name)
-    [Version::DomainVersion, Version::ContactVersion, Domain, Contact, Invoice, Account, AccountActivity].include?(class_name)
+    private
+
+    def default_generation(objects)
+      CSV.generate do |csv|
+        csv << @class_name.column_names
+        objects.each { |object| csv << object.attributes.values_at(*@class_name.column_names) }
+      end
+    end
+
+    def custom_csv?
+      [
+        Version::DomainVersion,
+        Version::ContactVersion,
+        Domain,
+        Contact,
+        Invoice,
+        Account,
+        AccountActivity
+      ].include?(@class_name)
+    end
   end
 end