use csv parser in log creator

app/services/bulk_upload/lettings/log_creator.rb

@@ -23,46 +23,35 @@ class BulkUpload::Lettings::LogCreator
 
 private
 
+  def csv_parser
+    @csv_parser ||= BulkUpload::Lettings::CsvParser.new(path:)
+  end
+
   def row_offset
-    5
+    csv_parser.row_offset
   end
 
   def col_offset
-    1
+    csv_parser.col_offset
   end
 
   def row_parsers
-    @row_parsers ||= body_rows.map do |row|
-      stripped_row = row[col_offset..]
-      headers = ("field_1".."field_134").to_a
-      hash = Hash[headers.zip(stripped_row)]
-      hash[:bulk_upload] = bulk_upload
+    return @row_parsers if @row_parsers
+
+    @row_parsers = csv_parser.row_parsers
 
-      BulkUpload::Lettings::RowParser.new(hash)
+    @row_parsers.each do |row_parser|
+      row_parser.bulk_upload = bulk_upload
     end
+
+    @row_parsers
   end
 
   def body_rows
-    rows[row_offset..]
+    csv_parser.body_rows
   end
 
   def rows
-    @rows ||= CSV.read(path, row_sep:)
-  end
-
-  # determine the row seperator from CSV
-  # Windows will use \r\n
-  def row_sep
-    contents = ""
-
-    File.open(path, "r") do |f|
-      contents = f.read
-    end
-
-    if contents[-2..] == "\r\n"
-      "\r\n"
-    else
-      "\n"
-    end
+    csv_parser.rows
   end
 end