find_localization.rb

# An example of how to find a component page. That matches a particular path.
# Used after the initial call using the full path fails.
Gluttonberg::PageLocalization.first(
  :dialect_id => 1, 
  :locale_id  => 1,
  :behaviour  => :component,
  :conditions => ["? LIKE (path || '%')", "about_us/action/id"], 
  :order      => [:path.asc]
)

gluttonberg_rewriter.rb

match(path << "(/:full_path)", :full_path => /\S+/).defer_to do |request, params|
  locale        = Gluttonberg::Locale.first(:slug => params[:locale])
  dialect       = Gluttonberg::Dialect.first(:code => params[:dialect])
  localization  = Gluttonberg::PageLocalization.first(
    :path.like    => params[:full_path] + "%",
    :locale_id    => locale.id,
    :dialect_id   => dialect.id
  )
  if localization
    page = localization.page
    page.current_localization = localization
  else
    raise Merb::Exceptions::NotFound
  end
  # Additional stuff that'll be handy on the other end
  additional_params = {:locale => locale, :dialect => dialect, :original_path => params[:full_path], :page => page}
  # Check to see if this is a page to dispatch to directly, or if we
  # need to reroute it.
  if page.behaviour == :component
    # Rewrite and reroute the request
    new_path = params[:full_path].gsub(%r{\w+/}, page.component)
    request.env["REQUEST_PATH"] = new_path
    # Then mix in our own bits and pass it back to the dispatcher
    results = Merb::Router.match(request)[1]
    results.merge!(additional_params)
  elsif localization.path == params[:full_path]
    {:controller => "gluttonberg/content/public", :action => "show"}.merge!(additional_params)
  else
    params
  end
end

TODO

* Raise a 404 if the dialect, locale, localization or page is missing
* Check the modes correctly — including falling back to a default
* Account for requests to the root
* Move a bunch of this logic out into it's own module
* Investigate a way to find the localization without repeated finds
* Finesse the path rewriting a LOT more, since this won't work properly
* Consider having forcing public controllers to be namespaced to prevent collisions with the page slugs
* Remember to note that this call has to go at the bottom of the router, or shit will blow up