[#1421] Move type specific for_export code to typed champs

app/models/champ.rb

@@ -75,16 +75,7 @@ class Champ < ApplicationRecord
 
   def for_export
     if value.present?
-      case type_champ
-      when 'textarea'
-        ActionView::Base.full_sanitizer.sanitize(value)
-      when 'yes_no'
-        value == 'true' ? 'oui' : 'non'
-      when 'multiple_drop_down_list'
-        drop_down_list.selected_options_without_decorator(self).join(', ')
-      else
-        value
-      end
+      value_for_export
     else
       nil
     end
@@ -117,4 +108,8 @@ class Champ < ApplicationRecord
   def string_value
     value.to_s
   end
+
+  def value_for_export
+    value
+  end
 end

app/models/champs/multiple_drop_down_list_champ.rb

@@ -18,4 +18,8 @@ class Champs::MultipleDropDownListChamp < Champ
   def string_value
     drop_down_list.selected_options_without_decorator(self).join(', ')
   end
+
+  def value_for_export
+    drop_down_list.selected_options_without_decorator(self).join(', ')
+  end
 end

app/models/champs/textarea_champ.rb

@@ -1,2 +1,7 @@
 class Champs::TextareaChamp < Champs::TextChamp
+  private
+
+  def value_for_export
+    ActionView::Base.full_sanitizer.sanitize(value)
+  end
 end

app/models/champs/yes_no_champ.rb

@@ -1,2 +1,7 @@
 class Champs::YesNoChamp < Champs::CheckboxChamp
+  private
+
+  def value_for_export
+    value == 'true' ? 'oui' : 'non'
+  end
 end