Initial impl of Authenticator and jsp files

src/zall/manager/AuthenticationManager.java

@@ -0,0 +1,30 @@
+package zall.manager;
+
+import zall.bean.Folder;
+import zall.bean.Media;
+import zall.bean.User;
+
+/**
+ *
+ */
+public class AuthenticationManager {
+
+    /**
+     * @return true if the specified user can edit the media
+     */
+    public static boolean canEdit(User user, Media target) {
+        return target != null && (user.isSuperUser() || target.getUser().equals(user));
+    }
+    /**
+     * @return true if the specified user can edit the media
+     */
+    public static boolean canEdit(User user, Folder target) {
+        return target != null && (user.isSuperUser() || user.equals( target.getUser() ));
+    }
+    /**
+     * @return true if the specified user can edit the profile of the other user
+     */
+    public static boolean canEdit(User user, User target){
+        return user.equals( target ) || user.isSuperUser();
+    }
+}