Implemented server.getOfflinePlayers

src/main/java/net/minecraft/server/WorldNBTStorage.java

@@ -253,5 +253,9 @@ public class WorldNBTStorage implements PlayerFileData, IDataManager {
             return null;
         }
     }
+
+    public File getPlayerDir() {
+        return playerDir;
+    }
     // CraftBukkit end
 }

src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -51,6 +51,7 @@ import net.minecraft.server.Item;
 import net.minecraft.server.ItemStack;
 import net.minecraft.server.WorldMap;
 import net.minecraft.server.WorldMapCollection;
+import net.minecraft.server.WorldNBTStorage;
 import net.minecraft.server.WorldSettings;
 import org.bukkit.*;
 import org.bukkit.configuration.ConfigurationSection;
@@ -71,6 +72,7 @@ import org.bukkit.craftbukkit.inventory.CraftShapelessRecipe;
 import org.bukkit.craftbukkit.map.CraftMapView;
 import org.bukkit.scheduler.BukkitWorker;
 import org.bukkit.craftbukkit.scheduler.CraftScheduler;
+import org.bukkit.craftbukkit.util.DatFileFilter;
 import org.bukkit.craftbukkit.util.Versioning;
 import org.bukkit.util.permissions.DefaultPermissions;
 import org.bukkit.event.world.WorldInitEvent;
@@ -918,4 +920,16 @@ public final class CraftServer implements Server {
     public File getWorldContainer() {
         return new File(configuration.getString("settings.world-container", "."));
     }
+
+    public OfflinePlayer[] getOfflinePlayers() {
+        WorldNBTStorage storage = (WorldNBTStorage)console.worlds.get(0).getDataManager();
+        String[] files = storage.getPlayerDir().list(new DatFileFilter());
+        OfflinePlayer[] players = new OfflinePlayer[files.length];
+
+        for (int i = 0; i < files.length; i++) {
+            players[i] = getOfflinePlayer(files[i].substring(0, files[i].length() - 4));
+        }
+
+        return players;
+    }
 }

src/main/java/org/bukkit/craftbukkit/util/DatFileFilter.java

@@ -0,0 +1,10 @@
+package org.bukkit.craftbukkit.util;
+
+import java.io.File;
+import java.io.FilenameFilter;
+
+public class DatFileFilter implements FilenameFilter {
+    public boolean accept(File dir, String name) {
+        return name.endsWith(".dat");
+    }
+}