1 files changed, 37 insertions, 6 deletions
diff --git a/app/models/admin/import.rb b/app/models/admin/import.rb
index 79c0722d5..fecde4878 100644
--- a/app/models/admin/import.rb
+++ b/app/models/admin/import.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'csv'
+
 # A non-activerecord helper class for csv upload
 class Admin::Import
   include ActiveModel::Model
@@ -15,17 +17,46 @@ class Admin::Import
     data.original_filename
   end
 
+  def csv_rows
+    csv_data.rewind
+
+    csv_data.take(ROWS_PROCESSING_LIMIT + 1)
+  end
+
   private
 
-  def validate_data
-    return if data.blank?
+  def csv_data
+    return @csv_data if defined?(@csv_data)
+
+    csv_converter = lambda do |field, field_info|
+      case field_info.header
+      when '#domain', '#public_comment'
+        field&.strip
+      when '#severity'
+        field&.strip&.to_sym
+      when '#reject_media', '#reject_reports', '#obfuscate'
+        ActiveModel::Type::Boolean.new.cast(field)
+      else
+        field
+      end
+    end
+
+    @csv_data = CSV.open(data.path, encoding: 'UTF-8', skip_blanks: true, headers: true, converters: csv_converter)
+    @csv_data.take(1) # Ensure the headers are read
+    @csv_data = CSV.open(data.path, encoding: 'UTF-8', skip_blanks: true, headers: ['#domain'], converters: csv_converter) unless @csv_data.headers&.first == '#domain'
+    @csv_data
+  end
 
-    csv_data = CSV.read(data.path, encoding: 'UTF-8')
+  def csv_row_count
+    return @csv_row_count if defined?(@csv_row_count)
 
-    row_count  = csv_data.size
-    row_count -= 1 if csv_data.first&.first == '#domain'
+    csv_data.rewind
+    @csv_row_count = csv_data.take(ROWS_PROCESSING_LIMIT + 2).count
+  end
 
-    errors.add(:data, I18n.t('imports.errors.over_rows_processing_limit', count: ROWS_PROCESSING_LIMIT)) if row_count > ROWS_PROCESSING_LIMIT
+  def validate_data
+    return if data.nil?
+    errors.add(:data, I18n.t('imports.errors.over_rows_processing_limit', count: ROWS_PROCESSING_LIMIT)) if csv_row_count > ROWS_PROCESSING_LIMIT
   rescue CSV::MalformedCSVError => e
     errors.add(:data, I18n.t('imports.errors.invalid_csv_file', error: e.message))
   end