demarches-normaliennes/app/models/champs/date_champ.rb

# == Schema Information
#
# Table name: champs
#
#  id                             :integer          not null, primary key
#  data                           :jsonb
#  fetch_external_data_exceptions :string           is an Array
#  prefilled                      :boolean          default(FALSE)
#  private                        :boolean          default(FALSE), not null
#  rebased_at                     :datetime
#  type                           :string
#  value                          :string
#  value_json                     :jsonb
#  created_at                     :datetime
#  updated_at                     :datetime
#  dossier_id                     :integer
#  etablissement_id               :integer
#  external_id                    :string
#  parent_id                      :bigint
#  row_id                         :string
#  type_de_champ_id               :integer
#
class Champs::DateChamp < Champ
  before_validation :convert_to_iso8601, unless: -> { validation_context == :prefill }
  validate :iso_8601

  def search_terms
    # Text search is pretty useless for dates so we’re not including these champs
  end

  def to_s
    value.present? ? I18n.l(Time.zone.parse(value), format: '%d %B %Y') : ""
  end

  def for_tag
    value.present? ? I18n.l(Time.zone.parse(value), format: '%d %B %Y') : ""
  end

  private

  def convert_to_iso8601
    return if likely_iso8601_format? && parsable_iso8601?

    self.value = if /^\d{2}\/\d{2}\/\d{4}$/.match?(value)
      Date.parse(value).iso8601
    else
      nil
    end
  end

  def iso_8601
    return if parsable_iso8601? || value.blank?
    # i18n-tasks-use t('errors.messages.not_a_date')
    errors.add :date, errors.generate_message(:value, :not_a_date)
  end

  def likely_iso8601_format?
    /^\d{4}-\d{2}-\d{2}$/.match?(value)
  end

  def parsable_iso8601?
    Date.parse(value)
    true
  rescue ArgumentError, # case 2023-27-02, out of range
         TypeError # nil
    false
  end
end