module Inspec::Impact

def self.impact_from_string(value)
  # return if its a number
  return value if is_number?(value)
  raise Inspec::ImpactError, "'#{value}' is not a valid impact name. Valid impact names: none, low, medium, high, critical." unless IMPACT_SCORES.key?(value.downcase)
  IMPACT_SCORES[value]
end

def self.is_number?(value)
  Float(value)
  true
rescue
  false
end

def self.string_from_impact(value)
  value = value.to_f
  raise Inspec::ImpactError, "'#{value}' is not a valid impact score. Valid impact scores: [0.0 - 1.0]." if value < 0 || value > 1
  IMPACT_SCORES.reverse_each do |name, impact|
    return name if value >= impact
  end
end