Support Wiki links.

src/main/scala/view/helpers.scala

@@ -2,6 +2,10 @@ package view
 import java.util.Date
 import java.text.SimpleDateFormat
 
+import org.pegdown._
+import org.pegdown.LinkRenderer.Rendering
+import org.pegdown.ast.WikiLinkNode
+
 object helpers {
   
   /**
@@ -18,9 +22,38 @@ object helpers {
   def format(value: String): twirl.api.Html = twirl.api.Html(
     value.replaceAll(" ", "&nbsp;").replaceAll("\t", "&nbsp;&nbsp;&nbsp;&nbsp;").replaceAll("\n", "<br>"))
 
-  def markdown(value: String): twirl.api.Html = {
+  /**
+   * Converts Markdown of Wiki pages to HTML. This method supports Wiki links.
+   */
+  def markdown(value: String, repository: app.RepositoryInfo)(implicit context: app.Context): twirl.api.Html = {
     import org.pegdown._
-    val html = new PegDownProcessor().markdownToHtml(value)
+    val html = new PegDownProcessor(Extensions.AUTOLINKS|Extensions.WIKILINKS)
+      .markdownToHtml(value, new LinkRenderer(){
+        override def render(node: WikiLinkNode): Rendering = {
+          try {
+            val text = node.getText
+            val (label, page) = if(text.contains('|')){
+              val i = text.indexOf('|')
+              (text.substring(0, i), text.substring(i + 1))
+            } else {
+              (text, text)
+            }
+            val url = "%s/%s/%s/wiki/%s".format(context.path, repository.owner, repository.name, 
+              java.net.URLEncoder.encode(page.replace(' ', '-'), "UTF-8"))
+            new Rendering(url, label);
+          } catch {
+            case e: java.io.UnsupportedEncodingException => throw new IllegalStateException();
+          }
+        }      
+      })
+    twirl.api.Html(html)
+  }
+  
+  /**
+   * Converts Markdown to HTML. This method does not support Wiki links.
+   */
+  def markdown(value: String): twirl.api.Html = {
+    val html = new PegDownProcessor().markdownToHtml(value, new LinkRenderer())
     twirl.api.Html(html)
   }