added checks for name difference from a PlayerReference and the datab…

…ase, address CanaryModTeam/CanaryMod#206

src/main/java/net/canarymod/backbone/BackboneUsers.java

@@ -187,7 +187,7 @@ public void updatePlayer(PlayerReference player) {
         try {
             HashMap<String, Object> filter = new HashMap<String, Object>();
             filter.put("uuid", player.getUUIDString());
-            filter.put("name", player.getName());
+            // filter.put("name", player.getName()); // Can't update a name if its filtered in...
             Database.get().update(data, filter);
         }
         catch (DatabaseWriteException e) {

src/main/java/net/canarymod/user/UserAndGroupsProvider.java

@@ -4,11 +4,16 @@
 import net.canarymod.Canary;
 import net.canarymod.ToolBox;
 import net.canarymod.api.OfflinePlayer;
+import net.canarymod.api.PlayerReference;
 import net.canarymod.api.entity.living.humanoid.Player;
 import net.canarymod.backbone.BackboneGroups;
 import net.canarymod.backbone.BackboneUsers;
+import net.canarymod.backbone.PlayerDataAccess;
+import net.canarymod.database.Database;
+import net.canarymod.database.exceptions.DatabaseWriteException;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -173,6 +178,29 @@ public boolean playerExists(String uuid) {
         return playerData.containsKey(uuid);
     }
 
+    /**
+     * Checks if a {@link net.canarymod.api.PlayerReference} has changed names compared to the database
+     *
+     * @param reference
+     *         the {@link net.canarymod.api.PlayerReference} to check
+     *
+     * @return {@code true} if the name is different in the database; {@code false} if not
+     */
+    public boolean nameChanged(PlayerReference reference) {
+        PlayerDataAccess data = new PlayerDataAccess();
+        try {
+            HashMap<String, Object> filter = new HashMap<String, Object>();
+            filter.put("uuid", reference.getUUIDString());
+            Database.get().update(data, filter);
+        }
+        catch (DatabaseWriteException e) {
+            log.error(e.getMessage(), e);
+            return false; // It either broke, or they don't exist
+        }
+        return !reference.getName().equals(data.name);
+    }
+
+
     /**
      * Return array of all existent groups
      *