# We're replacing the original method with one that doesn't always override the :raise option.
# This bug was introduced in Rails here (4.0.10.rc1, 4.1.0.rc1 and 4.2.0.beta1): https://github.com/rails/rails/pull/13832
# and fixed here (4.1.10.rc1 and 4.2.1.rc1): https://github.com/rails/rails/pull/17676 (thus, this is simply a backport of the bugfix)

module Localeapp::TranslationHelperRails41MonkeyPatch
  # Delegates to <tt>I18n#translate</tt> but also performs three additional functions.
  #
  # First, it will ensure that any thrown +MissingTranslation+ messages will be turned
  # into inline spans that:
  #
  #   * have a "translation-missing" class set,
  #   * contain the missing key as a title attribute and
  #   * a titleized version of the last key segment as a text.
  #
  # E.g. the value returned for a missing translation key :"blog.post.title" will be
  # <span class="translation_missing" title="translation missing: en.blog.post.title">Title</span>.
  # This way your views will display rather reasonable strings but it will still
  # be easy to spot missing translations.
  #
  # Second, it'll scope the key by the current partial if the key starts
  # with a period. So if you call <tt>translate(".foo")</tt> from the
  # <tt>people/index.html.erb</tt> template, you'll actually be calling
  # <tt>I18n.translate("people.index.foo")</tt>. This makes it less repetitive
  # to translate many keys within the same partials and gives you a simple framework
  # for scoping them consistently. If you don't prepend the key with a period,
  # nothing is converted.
  #
  # Third, it'll mark the translation as safe HTML if the key has the suffix
  # "_html" or the last element of the key is the word "html". For example,
  # calling translate("footer_html") or translate("footer.html") will return
  # a safe HTML string that won't be escaped by other HTML helper methods. This
  # naming convention helps to identify translations that include HTML tags so that
  # you know what kind of output to expect when you call translate in a template.
  def translate(key, options = {})
    options = options.dup
    remaining_defaults = Array(options.delete(:default))
    options[:default] = remaining_defaults.shift if remaining_defaults.first.kind_of? String

    # If the user has explicitly decided to NOT raise errors, pass that option to I18n.
    # Otherwise, tell I18n to raise an exception, which we rescue further in this method.
    # Note: `raise_error` refers to us re-raising the error in this method. I18n is forced to raise by default.
    if options[:raise] == false || (options.key?(:rescue_format) && options[:rescue_format].nil?)
      raise_error = false
      options[:raise] = false
    else
      raise_error = options[:raise] || options[:rescue_format] || ActionView::Base.raise_on_missing_translations
      options[:raise] = true
    end

    if html_safe_translation_key?(key)
      html_safe_options = options.dup
      options.each do |name, value|
        next if I18n::RESERVED_KEYS.include?(name)
        unless name == :count && value.is_a?(Numeric)
          html_safe_options[name] = ERB::Util.html_escape(value.to_s)
        end
      end
      translation = I18n.translate(scope_key_by_partial(key), html_safe_options)

      translation.respond_to?(:html_safe) ? translation.html_safe : translation
    else
      I18n.translate(scope_key_by_partial(key), options)
    end
  rescue I18n::MissingTranslationData => e
    if remaining_defaults.present?
      translate remaining_defaults.shift, options.merge(default: remaining_defaults)
    else
      raise e if raise_error

      keys = I18n.normalize_keys(e.locale, e.key, e.options[:scope])
      content_tag('span', keys.last.to_s.titleize, :class => 'translation_missing', :title => "translation missing: #{keys.join('.')}")
    end
  end
  alias :t :translate
end

ActionView::Base.send(:include, ::Localeapp::TranslationHelperRails41MonkeyPatch)
