Implemented a way to close forms from floodgate

api/src/main/java/org/geysermc/floodgate/api/FloodgateApi.java

@@ -97,6 +97,8 @@ static FloodgateApi getInstance() {
 
     boolean sendForm(UUID uuid, FormBuilder<?, ?, ?> formBuilder);
 
+    boolean closeForm(UUID uuid);
+
     /**
      * @deprecated since Cumulus 1.1 and will be removed when Cumulus 2.0 releases. Please use the
      * new form classes instead.

core/src/main/java/org/geysermc/floodgate/api/SimpleFloodgateApi.java

@@ -125,6 +125,11 @@ public boolean sendForm(UUID uuid, FormBuilder<?, ?, ?> formBuilder) {
         return sendForm(uuid, formBuilder.build());
     }
 
+    @Override
+    public boolean closeForm(UUID uuid) {
+        return pluginMessageManager.getChannel(FormChannel.class).closeForm(uuid);
+    }
+
     @Override
     public boolean sendForm(UUID uuid, org.geysermc.cumulus.Form<?> form) {
         return sendForm(uuid, form.newForm());

core/src/main/java/org/geysermc/floodgate/pluginmessage/channel/FormChannel.java

@@ -93,6 +93,10 @@ public Result handleServerCall(byte[] data, UUID playerUuid, String playerUserna
         return Result.handled();
     }
 
+    public boolean closeForm(UUID player) {
+        return pluginMessageUtils.sendMessage(player, getIdentifier(), new byte[0]);
+    }
+
     public boolean sendForm(UUID player, Form form) {
         byte[] formData = createFormData(form);
         return pluginMessageUtils.sendMessage(player, getIdentifier(), formData);