Simple tracking number class in ruby

gistfile1.rb

# Simple tracking number class just to streamline scraped numbers and user created tracking
class Tracking
  include ActiveModel::Model

  validates :carrier, presence: true
  validates :tracking_number, presence: true
  validates :ship_date, presence: true

  attr_accessor :carrier
  attr_accessor :tracking_number
  attr_accessor :ship_date

  # @param carrier [String]
  # @param tracking_number [String]
  # @param ship_date [Date]
  def initialize(carrier, tracking_number, ship_date)
    @carrier = carrier
    @tracking_number = tracking_number
    @ship_date = ship_date
  end
  
  # Create a Tracking obj from a tracking number
  # @param tracking_number [String]
  def self.create_from_tn(tracking_number)
    carrier = self.get_carrier_from_tn(tracking_number)
    
    # Could scrape the ship date here and set it, that would be ideal
    if carrier
      return Tracking.new(carrier, tracking_number, Time.now)
    else
      return Err.new("Invalid tracking number entered")
    end
  end

  #Some regex to figure out the main carriers people use
  # @param tracking_number [String]
  def self.get_carrier_from_tn(tracking_number)
    # UPS regex
    return "UPS" if tracking_number[/\b(1Z ?[0-9A-Z]{3} ?[0-9A-Z]{3} ?[0-9A-Z]{2} ?[0-9A-Z]{4} ?[0-9A-Z]{3} ?[0-9A-Z]|[\dT]\d\d\d ?\d\d\d\d ?\d\d\d)\b/]
    
    # USPS regex
    return "USPS" if tracking_number[/\b([A-Z]{2}\d{9}[A-Z]{2}|(420\d{9}(9[2345])?)?\d{20}|(420\d{5})?(9[12345])?(\d{24}|\d{20})|82\d{8})\b/]

    # Fedex regex
    return "FedEx" if tracking_number[/(\b96\d{20}\b)|(\b\d{15}\b)|(\b\d{12}\b)/]
    return "FedEx" if tracking_number[/\b((98\d\d\d\d\d?\d\d\d\d|98\d\d) ?\d\d\d\d ?\d\d\d\d( ?\d\d\d)?)\b/]
    return "FedEx" if tracking_number[/^[0-9]{15}$/]
  end

end