(refs #32)First impression of the plugin system

src/main/scala/plugin/PluginSystem.scala

@@ -0,0 +1,35 @@
+package plugin
+
+import app.Context
+
+/**
+ * Provides extension points to plug-ins.
+ */
+object PluginSystem {
+
+  private val repositoryMenuList = scala.collection.mutable.ListBuffer[Menu]()
+  private val globalMenuList = scala.collection.mutable.ListBuffer[Menu]()
+
+  case class Menu(label: String, url: String, icon: String, condition: Context => Boolean)
+
+  def addRepositoryMenu(label: String, url: String, icon: String = "")(condition: Context => Boolean): Unit = {
+    repositoryMenuList += Menu(label, url, icon, condition)
+  }
+
+  def addGlobalMenu(label: String, url: String, icon: String = "")(condition: Context => Boolean): Unit = {
+    globalMenuList += Menu(label, url, icon, condition)
+  }
+
+  def addAction(path: String): Unit = {
+    // TODO
+  }
+
+  def repositoryMenus: List[Menu] = repositoryMenuList.toList
+  def globalMenus: List[Menu] = globalMenuList.toList
+
+  // TODO This is a test
+  addGlobalMenu("Google", "http://www.google.co.jp/"){ context => context.loginAccount.isDefined }
+
+}
+
+

src/main/twirl/main.scala.html

@@ -60,11 +60,21 @@
                   <li><a href="@path/groups/new">New group</a></li>
                 </ul>
                 <a href="@url(loginAccount.get.userName)/_edit" class="menu" data-toggle="tooltip" data-placement="bottom" title="Account settings"><i class="icon-user"></i></a>
+                @plugin.PluginSystem.globalMenus.map { menu =>
+                  @if(menu.condition(context)){
+                    <a href="@menu.url" class="menu" data-toggle="tooltip" data-placement="bottom" title="@menu.label">@menu.label</a>
+                  }
+                }
                 @if(loginAccount.get.isAdmin){
                   <a href="@path/admin/users" class="menu" data-toggle="tooltip" data-placement="bottom" title="Administration"><i class="icon-wrench"></i></a>
                 }
                 <a href="@path/signout" class="menu-last" data-toggle="tooltip" data-placement="bottom" title="Sign out"><i class="icon-share-alt"></i></a>
               } else {
+                @plugin.PluginSystem.globalMenus.map { menu =>
+                  @if(menu.condition(context)){
+                    <a href="@menu.url" class="menu" data-toggle="tooltip" data-placement="bottom" title="@menu.label">@menu.label</a>
+                  }
+                }
                 <a href="@path/signin?redirect=@urlEncode(currentPath)" class="btn btn-last" id="signin">Sign in</a>
               }
             </div><!--/.nav-collapse -->