remove_invoice_items_2.rb

def lines(invoice)
  (invoice.lines.count / 100.0).ceil.times.map do |page|
    offset = page * 100
    invoice.lines.all(count: 100, offset: offset).map do |line|
      Stripe::InvoiceItem.construct_from line
    end
  end.flatten
end

def del_iis(iis)
  pb = ProgressBar.new("die", iis.size)
  iis.each do |ii|
    ii.delete
    pb.inc
  end
  pb.finish
end

def delete_invoice_items_for_customer(cust_id)
  invoice = Stripe::Invoice.upcoming(customer: cust_id)
  lis = lines(invoice)
  iis = lis.select { |line| line.metadata.present? && line.metadata[:invoice_line] == 'cash_issued'}
  del_iis(iis)
end