feat: update 2022 csv parser to have col flexibility like 2023

app/services/bulk_upload/lettings/year2022/csv_parser.rb

@@ -11,7 +11,11 @@ class BulkUpload::Lettings::Year2022::CsvParser
   end
 
   def row_offset
-    with_headers? ? 5 : 0
+    if with_headers?
+      rows.find_index { |row| row[0].match(/field number/i) } + 1
+    else
+      0
+    end
   end
 
   def col_offset
@@ -25,7 +29,7 @@ class BulkUpload::Lettings::Year2022::CsvParser
   def row_parsers
     @row_parsers ||= body_rows.map do |row|
       stripped_row = row[col_offset..]
-      hash = Hash[headers.zip(stripped_row)]
+      hash = Hash[field_numbers.zip(stripped_row)]
 
       BulkUpload::Lettings::Year2022::RowParser.new(hash)
     end
@@ -40,21 +44,29 @@ class BulkUpload::Lettings::Year2022::CsvParser
   end
 
   def column_for_field(field)
-    cols[headers.find_index(field) + col_offset]
+    cols[field_numbers.find_index(field) + col_offset]
   end
 
   def valid_field_numbers_count
-    FIELDS
+    field_numbers.count { |f| f != "field_blank" }
   end
 
   def with_headers?
-    rows[0][0]&.match?(/\D+/)
+    rows.map { |r| r[0] }.any? { |cell| cell&.match?(/field number/i) }
   end
 
   private
 
-  def headers
-    @headers ||= ("field_1".."field_#{FIELDS}").to_a
+  def default_field_numbers
+    ("field_1".."field_#{FIELDS}").to_a
+  end
+
+  def field_numbers
+    @field_numbers ||= if with_headers?
+                         rows[row_offset - 1][col_offset..].map { |h| h.present? && h.match?(/^[0-9]+$/) ? "field_#{h}" : "field_blank" }
+                       else
+                         default_field_numbers
+                       end
   end
 
   def row_sep

app/services/bulk_upload/lettings/year2022/row_parser.rb

@@ -142,6 +142,8 @@ class BulkUpload::Lettings::Year2022::RowParser
   attribute :bulk_upload
   attribute :block_log_creation, :boolean, default: -> { false }
 
+  attribute :field_blank
+
   attribute :field_1, :integer
   attribute :field_2
   attribute :field_3
@@ -366,7 +368,7 @@ class BulkUpload::Lettings::Year2022::RowParser
   def blank_row?
     attribute_set
       .to_hash
-      .reject { |k, _| %w[bulk_upload block_log_creation].include?(k) }
+      .reject { |k, _| %w[bulk_upload block_log_creation field_blank].include?(k) }
       .values
       .reject(&:blank?)
       .compact