module ApplicationHelper
  def truncate_html(html, length, &block)
    truncate html.nil? ? '' : sanitize(html, tags: {}).squish , length: length, separator: ' ', &block
  end

  def is_administrator?
    current_account.present? && current_account.administrator.present?
  end

  def show_amount(amount)
    "#{((amount || 0) * Bank::SATOSHI_COEFF).round} <strong>SATOSHI</strong>".html_safe
  end

  def to_d digits_after_dot, value
    if value.present?
      "%.#{digits_after_dot}f" % value
    else
      value
    end
  end

  def localize_datetime(date)
    "#{l date.to_date} #{date.strftime('%H:%M:%S')}" if date.present?
  end

  def timer_timeslot(seconds)
    [60, 60, 1000].map { |count| seconds, n = seconds.divmod(count); n.to_s.rjust(2, '0') }.reverse.join(':')
  end

  def humanize_timeslot(seconds)
    [[60, 'second'], [60, 'minute'], [24, 'hour'], [1000, 'day']].map { |count, name|
      if seconds > 0
        seconds, n = seconds.divmod(count)
        n > 0 ? pluralize(n.to_i, name) : nil
      end
    }.compact.reverse.join(', ')
  end
end