Module: RailsI18nOnair::LiveUi::TranslationHelper

Defined in:
lib/rails_i18n_onair/live_ui/translation_helper.rb

Overview

Prepended to ActionView::Helpers::TranslationHelper so that every t() call wraps its output in a carrying data-attributes when Live UI is active.

When Live UI is OFF or no translator is signed in the call falls straight through to the original helper — zero overhead.

Instance Method Summary collapse

Instance Method Details

#t(key, **options) ⇒ Object

Re-alias so that both t() and translate() go through the override.



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# File 'lib/rails_i18n_onair/live_ui/translation_helper.rb', line 87

def t(key, **options)
  translate(key, **options)
end

#translate(key, **options) ⇒ Object 



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# File 'lib/rails_i18n_onair/live_ui/translation_helper.rb', line 11

def translate(key, **options)
  # Fast path: skip wrapping unless the middleware flagged this request
  unless _i18n_onair_live_ui_active?
    return super
  end

  # Allow callers to opt-out: t("key", i18n_onair: false)
  if options.delete(:i18n_onair) == false
    return super
  end

  # Interpolation values may themselves be wrapped translations
  # (t("greeting", name: t("app_name"))) — strip the inner wrapping so
  # the outer text interpolates plain strings, not span markup.
  Unwrapper.unwrap_options!(options)

  # Resolve lazy keys (.title → controller.action.title)
  resolved_key = scope_key_by_partial(key)
  # Include :scope so the editor saves to the correct full key path
  if options[:scope]
    resolved_key = (Array(options[:scope]).map(&:to_s) + [resolved_key.to_s]).join(".")
  end
  # Strip region/variant: "en_FRA" → "en", "pt-BR" → "pt"
  # Locale files use language-only keys (en.yml, fr.yml, etc.)
  locale = (options[:locale] || I18n.locale).to_s.split(/[-_]/).first

  result = super(key, **options)

  # Only wrap plain text (t() may return a Hash subtree or an Array)
  return result unless result.is_a?(String)

  # Fetch the raw template (with %{vars} intact) for the editor.
  # Only needed when interpolation variables are present in options.
  i18n_reserved = [:scope, :default, :separator, :resolve, :object, :fallback, :format, :cascade, :throw, :raise, :locale, :exception_handler]
  has_interpolation = (options.keys - i18n_reserved).any?
  raw_template = nil

  if has_interpolation
    begin
      raw_template = I18n.backend.translate(locale, resolved_key, {})
      if raw_template.is_a?(Hash) && options.key?(:count)
        # Pluralized entry — point the editor at the plural subkey that
        # produced this text, so saving edits that form instead of
        # overwriting the whole {one:, other:} hash.
        plural_key = _i18n_onair_plural_key(raw_template, options[:count], result, options.except(*i18n_reserved))
        if plural_key
          resolved_key = "#{resolved_key}.#{plural_key}"
          raw_template = raw_template[plural_key.to_sym] || raw_template[plural_key.to_s]
        end
      end
    rescue StandardError
      raw_template = nil
    end
  end

  attrs = {
    i18n_onair: "true",
    i18n_key: resolved_key.to_s,
    i18n_locale: locale.to_s
  }

  if raw_template.is_a?(String) && raw_template.include?("%{")
    attrs[:i18n_raw] = raw_template
    interp_vars = options.except(*i18n_reserved)
    attrs[:i18n_vars] = interp_vars.to_json if interp_vars.any?
  end

  content_tag(
    :span,
    result,
    data: attrs,
    style: "display:contents"
  )
end