schrodingersbox/status_cat

module StatusCat

  class Status

    # Returns an array of instances of StatusCat::Checkers::Base subclasses
    def self.all
      StatusCat::Config.instance.enabled.map { |name| factory(name) }
    end

    # By default, returns all checkers
    # If given a list of checker names, returns an array of those checkers
    # If given a single checker name, just returns that checker
    def self.check(which = :all)
      return all if which == :all
      return factory(which) unless which.is_a?(Array)
      return which.map { |name| factory(name) }
    end

    # Emails ::failed list if it is not empty
    def self.cron
      checkers = failed
      StatusCat::StatusMailer.failure(checkers).deliver_now unless checkers.empty?
    end

    # Constructs a checker instance given it's name
    def self.factory(name)
      ('StatusCat::Checkers::' + name.to_s.classify).constantize.new
    end

    # Returns an array of failed instances of ::all
    def self.failed
      all.map { |checker| checker.status.nil? ? nil : checker }.compact
    end
  end
end