Add FormUtils for advanced bedrock experience

src/main/java/fr/xephi/authme/util/FormUtils.java

@@ -0,0 +1,26 @@
+package fr.xephi.authme.util;
+
+import fr.xephi.authme.api.v3.AuthMeApi;
+import org.bukkit.entity.Player;
+import org.geysermc.cumulus.form.CustomForm;
+import org.geysermc.floodgate.api.FloodgateApi;
+
+import java.util.UUID;
+
+public class FormUtils {
+    private static final FloodgateApi floodgateApi = FloodgateApi.getInstance();
+    private static final AuthMeApi authMeApi = AuthMeApi.getInstance();
+
+    public static void openRegisterForm(Player player, String title, String text, String textBar) {
+        String name = player.getName();
+        UUID uuid = player.getUniqueId();
+        CustomForm.Builder regForm = CustomForm.builder()
+            .title(title)
+            .input(text, textBar)
+            .validResultHandler(((customForm1, customFormResponse) -> {
+                authMeApi.registerPlayer(name, customFormResponse.asInput(0));
+            }));
+        floodgateApi.sendForm(uuid, regForm);
+    }
+
+}