Розбір CSV з Монобанку

monocsv.rb

require 'csv'

def parse_monocsv(csv_string)
  columns = %i[
    date
    hour
    debit_or_credit
    details
    counteragent
    edrpou
    iban
    amount_in_account_currency
    amount_in_operation_currency
    operation_currency
    exchange_rate
    uah_equivalent_amount
    comission_in_account_currency
    remainder_in_account_currency
  ]

  monocsv = CSV.parse(csv_string)

  if monocsv.length < 2 || monocsv[1].length != columns.length
    raise 'sanity check - format wrong'
  end

  monocsv[2..].map do |row|
    Hash[columns.zip(row)].tap do |operation|
      operation[:date_and_hour] = "#{operation[:date]} #{operation[:hour]}"
      operation[:datetime] = DateTime.strptime(operation[:date_and_hour], '%d.%m.%Y %H:%M:%S')
    end
  end
end