Add csv export button do domain list in registrar area

#248

app/controllers/registrar/domains_controller.rb

@@ -14,7 +14,7 @@ class Registrar::DomainsController < Registrar::DeppController # EPP controller
     if params[:q].length == 1 && params[:q][:name_matches].present?
       @domain = Domain.find_by(name: params[:q][:name_matches])
       if @domain
-        redirect_to info_registrar_domains_path(domain_name: @domain.name) and return
+        redirect_to info_registrar_domains_url(domain_name: @domain.name) and return
       end
     end
 
@@ -40,6 +40,20 @@ class Registrar::DomainsController < Registrar::DeppController # EPP controller
     end
 
     @domains = @domains.per(params[:results_per_page]) if params[:results_per_page].to_i > 0
+
+    respond_to do |format|
+      format.html
+      format.csv do
+        domain_presenters = []
+
+        @domains.find_each do |domain|
+          domain_presenters << ::DomainPresenter.new(domain: domain, view: view_context)
+        end
+
+        csv = Registrar::DomainListCSVPresenter.new(domains: domain_presenters, view: view_context).to_s
+        send_data(csv)
+      end
+    end
   end
   # rubocop: enable Metrics/PerceivedComplexity
   # rubocop: enable Metrics/CyclomaticComplexity

app/presenters/domain_presenter.rb

@@ -1,5 +1,5 @@
 class DomainPresenter
-  delegate :name, :registrant_name, :registrant_id, to: :domain
+  delegate :name, :registrant_name, :registrant_id, :registrant_code, to: :domain
 
   def initialize(domain:, view:)
     @domain = domain

app/presenters/registrar/domain_list_csv_presenter.rb

@@ -0,0 +1,45 @@
+class Registrar::DomainListCSVPresenter
+  def initialize(domains:, view:)
+    @domains = domains
+    @view = view
+  end
+
+  def to_s
+    table = CSV::Table.new([header])
+
+    domains.each do |domain|
+      table << domain_to_row(domain: domain)
+    end
+
+    table.to_s
+  end
+
+  private
+
+  def header
+    columns = %w(
+      domain_name
+      registrant_name
+      registrant_code
+      expire_time
+    )
+
+    columns.map! { |column| view.t("registrar.domains.index.csv.#{column}") }
+
+    CSV::Row.new(columns, [], true)
+  end
+
+  def domain_to_row(domain:)
+    row = []
+    row[0] = domain.name
+    row[1] = domain.registrant_name
+    row[2] = domain.registrant_code
+    row[3] = domain.expire_date
+    row
+
+    CSV::Row.new([], row)
+  end
+
+  attr_reader :domains
+  attr_reader :view
+end

app/views/registrar/domains/index.haml

@@ -52,6 +52,10 @@
              
           %button.btn.btn-default.js-reset-form
             = t(:clear_fields)
+      .row
+        .col-md-2
+          = button_tag t('.export_csv_btn'), class: 'btn btn-primary export-domains-csv-btn',
+          formaction: registrar_domains_path(format: 'csv')
 %hr
 
 .row