Added support for UUID-based player lookups in 1.7.5+

You could argue that ShadowRanger's conversion of everything to UUID is better, but that would result in us having to contact Mojang's servers simply to fetch a player by UUID for versions < 1.7.5. It seems excessive (not to mention that uncached contact can result in rate limiting) when the server itself will not remember who they are across name changes. If they can re-obtain everything in their inventory, they can re-run /ac.

v1_7_R3/src/main/java/com/lishid/openinv/internal/v1_7_R3/PlayerDataManager.java

@@ -16,6 +16,8 @@
 
 package com.lishid.openinv.internal.v1_7_R3;
 
+import java.util.UUID;
+
 import com.lishid.openinv.internal.IPlayerDataManager;
 
 import org.bukkit.Bukkit;
@@ -60,4 +62,20 @@ public class PlayerDataManager implements IPlayerDataManager {
         return player.getUniqueId().toString();
     }
 
+    @Override
+    public OfflinePlayer getPlayerByID(String identifier) {
+        try {
+            UUID uuid = UUID.fromString(identifier);
+            OfflinePlayer player = Bukkit.getOfflinePlayer(uuid);
+            // Ensure player is a real player, otherwise return null
+            if (player == null || !player.hasPlayedBefore() && !player.isOnline()) {
+                return null;
+            }
+            return player;
+        } catch (IllegalArgumentException e) {
+            // Not a UUID
+            return null;
+        }
+    }
+
 }