#85: Login as guest

docs-web-common/src/main/java/com/sismics/security/AnonymousPrincipal.java

@@ -59,4 +59,9 @@ public class AnonymousPrincipal implements IPrincipal {
     public Set<String> getGroupIdSet() {
         return Sets.newHashSet();
     }
+
+    @Override
+    public boolean isGuest() {
+        return false;
+    }
 }

docs-web-common/src/main/java/com/sismics/security/IPrincipal.java

@@ -18,6 +18,13 @@ public interface IPrincipal extends Principal {
      */
     boolean isAnonymous();
 
+    /**
+     * Checks if the principal is a guest.
+     *
+     * @return True if the principal is a guest
+     */
+    boolean isGuest();
+
     /**
      * Returns the ID of the connected user, or null if the user is anonymous
      * 

docs-web-common/src/main/java/com/sismics/security/UserPrincipal.java

@@ -2,6 +2,7 @@ package com.sismics.security;
 
 import java.util.Set;
 
+import com.sismics.docs.core.constant.Constants;
 import org.joda.time.DateTimeZone;
 
 /**
@@ -108,4 +109,9 @@ public class UserPrincipal implements IPrincipal {
     public void setGroupIdSet(Set<String> groupIdSet) {
         this.groupIdSet = groupIdSet;
     }
+
+    @Override
+    public boolean isGuest() {
+        return Constants.GUEST_USER_ID.equals(id);
+    }
 }