Implemented new ban and unban methods

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-server/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java

@@ -25,16 +25,28 @@ public class CraftOfflinePlayer implements OfflinePlayer {
     }
 
     public boolean isOp() {
-        return server.getHandle().isOp(getName());
+        return server.getHandle().isOp(getName().toLowerCase());
     }
 
     public void setOp(boolean value) {
         if (value == isOp()) return;
 
         if (value) {
-            server.getHandle().e(getName());
+            server.getHandle().e(getName().toLowerCase());
         } else {
-            server.getHandle().f(getName());
+            server.getHandle().f(getName().toLowerCase());
+        }
+    }
+
+    public boolean isBanned() {
+        return server.getHandle().banByName.contains(name.toLowerCase());
+    }
+
+    public void setBanned(boolean value) {
+        if (value) {
+            server.getHandle().a(name.toLowerCase());
+        } else {
+            server.getHandle().b(name.toLowerCase());
         }
     }
 }

paper-server/src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -829,4 +829,14 @@ public final class CraftServer implements Server {
     public void unbanIP(String address) {
         server.d(address);
     }
+
+    public Set<OfflinePlayer> getBannedPlayers() {
+        Set<OfflinePlayer> result = new HashSet<OfflinePlayer>();
+
+        for (Object name : server.banByName) {
+            result.add(getOfflinePlayer((String)name));
+        }
+
+        return result;
+    }
 }

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -354,4 +354,16 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     public void resetPlayerTime() {
         setPlayerTime(0, true);
     }
+
+    public boolean isBanned() {
+        return server.getHandle().banByName.contains(getName().toLowerCase());
+    }
+
+    public void setBanned(boolean value) {
+        if (value) {
+            server.getHandle().a(getName().toLowerCase());
+        } else {
+            server.getHandle().b(getName().toLowerCase());
+        }
+    }
 }