First steps for an own wiki.

* Scaffold for Page Objekt
* Using textile for rendering html
* Easy wiki-links with [[wikipage]]

app/helpers/pages_helper.rb

@@ -0,0 +1,18 @@
+module PagesHelper
+
+  def wikified_body(body)
+    r = RedCloth.new(body)
+    r.gsub!(/\[\[(.*?)(\|(.*?))?\]\]/) { wiki_link($1, $3) }
+    sanitize r.to_html
+    r.to_html
+  end
+
+  def wiki_link(wiki_words, link_text = nil)
+    permalink = wiki_words.downcase.gsub(' ', '-')
+    if Page.exists?(:permalink => permalink)
+      link_to((link_text || wiki_words), wiki_page_url(permalink))
+    else
+      link_to((link_text || wiki_words), wiki_page_url(permalink), :class => "new_wiki_link")
+    end
+  end
+end