jwood/auroraalarm

class SolarEvent < ActiveRecord::Base

  validates :message_code, presence: true, length: { maximum: 15 }
  validates :serial_number, presence: true, uniqueness: true, length: { maximum: 15 }
  validates :issue_time, presence: true
  validates :expected_storm_strength, presence: true, length: { maximum: 3 }

  validate :ensure_only_one_solar_event_per_day

  def self.occurred_on(date)
    where(issue_time: [date.beginning_of_day..date.end_of_day]).first
  end

  private

  def ensure_only_one_solar_event_per_day
    if self.issue_time && SolarEvent.occurred_on(self.issue_time.to_date)
      errors.add(:issue_time, "^A solar event has already been recorded for this date")
    end
  end

end