Implement atom feeds

src/main/scala/app/ControllerBase.scala

@@ -143,6 +143,9 @@ case class Context(settings: SystemSettingsService.SystemSettings, loginAccount:
 
   lazy val currentPath = request.getRequestURI.substring(request.getContextPath.length)
 
+  lazy val baseURL = request.getRequestURL.substring(0, request.getRequestURL.length - request.getRequestURI.length) + path
+  lazy val host = request.getServerName
+
   /**
    * Get object from cache.
    *

src/main/scala/app/IndexController.scala

@@ -46,6 +46,11 @@ trait IndexControllerBase extends ControllerBase {
     redirect("/")
   }
 
+  get("/activities.atom"){
+    contentType = "application/atom+xml; type=feed"
+    xml.feed(getRecentActivities())
+  }
+
   /**
    * Set account information into HttpSession and redirect.
    */

src/main/scala/view/helpers.scala

@@ -15,6 +15,11 @@ object helpers extends AvatarImageProvider with LinkConverter with RequestCache
    */
   def datetime(date: Date): String = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date)
 
+  /**
+   * Format java.util.Date to "yyyy-MM-dd'T'hh:mm:ss'Z'".
+   */
+  def datetimeRFC3339(date: Date): String = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ss'Z'").format(date).replaceAll("(\\d\\d)(\\d\\d)$","$1:$2")
+
   /**
    * Format java.util.Date to "yyyy-MM-dd".
    */

src/main/twirl/feed.scala.xml

@@ -0,0 +1,30 @@
+@(activities: List[model.Activity])(implicit context: app.Context)<?xml version="1.0" encoding="UTF-8"?>
+@import context._
+@import view.helpers._
+<feed xmlns="http://www.w3.org/2005/Atom" xmlns:media="http://search.yahoo.com/mrss/" xml:lang="en-US">
+  @header(activities)
+  @activities.map { activity => @item(activity) }
+</feed>
+
+@header(activities: List[model.Activity]) = {<id>tag:@context.host,2013:gitbucket</id>
+  <title>Gitbucket's activities</title>
+  <link type="application/atom+xml" rel="self" href="@context.baseURL/activities.atom"/>
+  <author>
+    <name>Gitbucket</name>
+    <uri>@context.baseURL</uri>
+  </author>
+  <updated>@datetimeRFC3339(activities.map(_.activityDate).max)</updated>}
+
+@item(activity: model.Activity) = {
+  <entry>
+    <id>tag:@context.host,@date(activity.activityDate):activity:@activity.activityId</id>
+    <published>@datetimeRFC3339(activity.activityDate)</published>
+    <updated>@datetimeRFC3339(activity.activityDate)</updated>
+    <link type="text/html" rel="alternate" href="@context.baseURL/@activity.userName/@activity.repositoryName" />
+    <title type="html">@activity.activityType</title>
+    <author>
+      <name>@activity.activityUserName</name>
+      <uri>@url(activity.activityUserName)</uri>
+    </author>
+    <content type="html">@activityMessage(activity.message)</content>
+  </entry>}

src/main/twirl/helper/activities.scala.html

@@ -5,6 +5,9 @@
 @if(activities.isEmpty){
   No activity
 } else {
+  <div style="text-align:right;">
+    <a href="@path/activities.atom"><img src="@assets/common/images/feed.png" alt="activities"></a>
+  </div>
   @activities.map { activity =>
     <div class="block">
       @(activity.activityType match {