module Jekyll::Algolia::Indexer

def self.update_records(index_name, old_records_ids, new_records)
  # Stop if nothing to change
  if old_records_ids.empty? && new_records.empty?
    Logger.log('I:Nothing to index. Your content is already up to date.')
    return
  end
  Logger.log("I:Updating records in index #{index_name}...")
  Logger.log("I:Records to delete: #{old_records_ids.length}")
  Logger.log("I:Records to add:    #{new_records.length}")
  return if Configurator.dry_run?
  operations = new_records.map do |new_record|
    { action: 'addObject', indexName: index_name, body: new_record }
  end
  old_records_ids.each do |object_id|
    operations << {
      action: 'deleteObject', indexName: index_name,
      body: { objectID: object_id }
    }
  end
  # Run the batches in slices if they are too large
  batch_size = Configurator.algolia('indexing_batch_size')
  operations.each_slice(batch_size) do |slice|
    begin
      ::Algolia.batch!(slice)
    rescue StandardError => error
      records = slice.map do |record|
        record[:body]
      end
      ErrorHandler.stop(error, records: records)
    end
  end
end