demarches-normaliennes/app/models/prefill_params.rb

class PrefillParams
  def initialize(dossier, params)
    @dossier = dossier
    @params = params
  end

  def to_a
    build_prefill_values.filter(&:prefillable?).map(&:to_h)
  end

  private

  def build_prefill_values
    # Builds: [{ stable_id: 1, value: "a value" }, { stable_id: 2, value: "another value"}]
    stable_ids_and_values =
      @params
        .to_unsafe_hash
        .map { |typed_id, value| { stable_id: stable_id_from_typed_id(typed_id), value: value } }
        .filter { _1[:stable_id].present? && _1[:value].present? }

    @dossier
      .find_champs_by_stable_ids(stable_ids_and_values.map { _1[:stable_id] })
      .map do |champ|
        value = stable_ids_and_values.find { _1[:stable_id] == champ.stable_id }[:value]

        PrefillValue.new(champ: champ, value: value)
      end
  end

  def stable_id_from_typed_id(typed_id)
    Champ.id_from_typed_id(typed_id).to_i
  rescue
    nil
  end

  class PrefillValue
    AUTHORIZED_TYPES_DE_CHAMPS = [
      TypeDeChamp.type_champs.fetch(:text),
      TypeDeChamp.type_champs.fetch(:textarea),
      TypeDeChamp.type_champs.fetch(:decimal_number),
      TypeDeChamp.type_champs.fetch(:integer_number),
      TypeDeChamp.type_champs.fetch(:email),
      TypeDeChamp.type_champs.fetch(:phone),
      TypeDeChamp.type_champs.fetch(:address),
      TypeDeChamp.type_champs.fetch(:pays),
      TypeDeChamp.type_champs.fetch(:regions),
      TypeDeChamp.type_champs.fetch(:departements),
      TypeDeChamp.type_champs.fetch(:siret),
      TypeDeChamp.type_champs.fetch(:rna),
      TypeDeChamp.type_champs.fetch(:iban),
      TypeDeChamp.type_champs.fetch(:annuaire_education)
    ]

    NEED_VALIDATION_TYPES_DE_CHAMPS = [
      TypeDeChamp.type_champs.fetch(:decimal_number),
      TypeDeChamp.type_champs.fetch(:integer_number)
    ]

    attr_reader :champ, :value

    def initialize(champ:, value:)
      @champ = champ
      @value = value
    end

    def prefillable?
      exists? && authorized? && valid?
    end

    def to_h
      {
        id: champ.id,
        value: value
      }
    end

    private

    def exists?
      champ.present?
    end

    def authorized?
      AUTHORIZED_TYPES_DE_CHAMPS.include?(champ.type_champ)
    end

    def valid?
      return true unless NEED_VALIDATION_TYPES_DE_CHAMPS.include?(champ.type_champ)

      champ.value = value
      champ.valid?
    end
  end
end