custom_form_helpers.rb

module CustomFormHelpers
  delegate :params, :hidden_field_tag, to: :template

  attr_reader :template

  def continue_button(continue: :continue)
    submit_button(continue)
  end

  # Used to customise captions above the page heading
  def i18n_caption
    I18n.t(
      object.conviction_subtype, scope: scope_for_locale(:caption)
    )
  end

  # Used to customise legends when reusing the same view
  def i18n_legend
    I18n.t(
      object.i18n_attribute, scope: scope_for_locale(:legend), default: :default
    )
  end

  def i18n_date_hint(lead_text = i18n_lead_text)
    safe_join([
      content_tag(:p, lead_text),
      I18n.t("helpers/dictionary.date_hint_text").html_safe,
    ])
  end

  # Used to customise hints when reusing the same view
  # Hints support markup so ensure locale keys ends with `_html`
  def i18n_hint
    I18n.t(
      "#{object.i18n_attribute}_html", scope: scope_for_locale(:hint), default: :default_html
    ).html_safe
  end

  # Used to customise lead text when reusing the same view
  def i18n_lead_text
    I18n.t(
      object.i18n_attribute, scope: scope_for_locale(:lead_text), default: :default
    )
  end

private

  def submit_button(i18n_key, opts = {}, &block)
    safe_join(
      [
        next_step_if_present,
        govuk_submit(I18n.t("helpers.buttons.#{i18n_key}"), **opts, &block),
      ],
    )
  end

  # Do not blindly trust the param, always check
  def next_step_if_present
    next_step = case params[:next_step]
                when "cya"
                  "/steps/check/check_your_answers"
                end

    hidden_field_tag(:next_step, next_step) if next_step
  end

  def scope_for_locale(context)
    [:helpers, context, object_name]
  end
end