module BodyTrackersHelper
  def format_value(value, precision=2, mfu_unit=nil)
    amount, unit = value
    case
    when amount.nil?
      '-'
    when amount.nan?
      '?'
    else
      unit_desc = unit != mfu_unit ? unit && " [#{unit.shortname}]" || ' [-]' : ''
      "%.#{precision}f%s" % [amount, unit_desc]
    end
  end

  def format_time(t)
    t.strftime("%R") if t
  end

  def toggle_exposure_options(enabled, domain)
    disabled = []
    enabled = enabled.to_a
    options = nested_set_options(@project.quantities.send(domain)) do |q|
      disabled << q.id if enabled.include?(q)
      raw("#{'&ensp;' * q.level}#{q.name}")
    end
    options_for_select(options, disabled: disabled)
  end

  def unit_options
    @project.units.map do |u|
      [u.shortname, u.id]
    end
  end
end