Fix Spigot Components serializer on legacy servers

Author: Rothes

src/main/java/me/rothes/protocolstringreplacer/utils/SpigotUtils.java

@@ -1,9 +1,27 @@
 package me.rothes.protocolstringreplacer.utils;
 
 import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import me.rothes.protocolstringreplacer.ProtocolStringReplacer;
 import net.md_5.bungee.api.chat.BaseComponent;
+import net.md_5.bungee.api.chat.ItemTag;
+import net.md_5.bungee.api.chat.KeybindComponent;
+import net.md_5.bungee.api.chat.ScoreComponent;
+import net.md_5.bungee.api.chat.SelectorComponent;
 import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.chat.TranslatableComponent;
+import net.md_5.bungee.api.chat.hover.content.Entity;
+import net.md_5.bungee.api.chat.hover.content.EntitySerializer;
+import net.md_5.bungee.api.chat.hover.content.Item;
+import net.md_5.bungee.api.chat.hover.content.ItemSerializer;
+import net.md_5.bungee.api.chat.hover.content.Text;
+import net.md_5.bungee.api.chat.hover.content.TextSerializer;
 import net.md_5.bungee.chat.ComponentSerializer;
+import net.md_5.bungee.chat.KeybindComponentSerializer;
+import net.md_5.bungee.chat.ScoreComponentSerializer;
+import net.md_5.bungee.chat.SelectorComponentSerializer;
+import net.md_5.bungee.chat.TextComponentSerializer;
+import net.md_5.bungee.chat.TranslatableComponentSerializer;
 
 import java.lang.reflect.Field;
 
@@ -17,22 +35,41 @@ public class SpigotUtils {
             for (Field declaredField : ComponentSerializer.class.getDeclaredFields()) {
                 if (declaredField.getType() == Gson.class) {
                     declaredField.setAccessible(true);
-                    Gson gson = (Gson) declaredField.get(null);
-                    temp = gson.newBuilder().disableHtmlEscaping().create();
+                    temp = (Gson) declaredField.get(null);
+                    try {
+                        temp = temp.newBuilder().disableHtmlEscaping().create();
+                    } catch (NoSuchMethodError e) {
+                        GsonBuilder gsonBuilder = new GsonBuilder().disableHtmlEscaping();
+                        try {
+                            gsonBuilder.registerTypeAdapter(BaseComponent.class, new ComponentSerializer()).
+                                    registerTypeAdapter(TextComponent.class, new TextComponentSerializer()).
+                                    registerTypeAdapter(TranslatableComponent.class, new TranslatableComponentSerializer()).
+                                    registerTypeAdapter(KeybindComponent.class, new KeybindComponentSerializer()).
+                                    registerTypeAdapter(ScoreComponent.class, new ScoreComponentSerializer()).
+                                    registerTypeAdapter(SelectorComponent.class, new SelectorComponentSerializer()).
+                                    registerTypeAdapter(Entity.class, new EntitySerializer()).
+                                    registerTypeAdapter(Text.class, new TextSerializer()).
+                                    registerTypeAdapter(Item.class, new ItemSerializer()).
+                                    registerTypeAdapter(ItemTag.class, new ItemTag.Serializer());
+                        } catch (NoClassDefFoundError ignored) {
+                            // Some types are not available on legacy servers.
+                        }
+                        temp = gsonBuilder.create();
+                    }
                     break;
                 }
             }
-        } catch (IllegalAccessException e) {
-            throw new RuntimeException(e);
+        } catch (Throwable e) {
+            ProtocolStringReplacer.error("Unable to disableHtmlEscaping for SpigotComponentSerializer:", e);
         }
         psrSerializer = temp;
     }
 
     public static String serializeComponents(BaseComponent... components) {
         if ( components.length == 1 ) {
-            return psrSerializer.toJson( components[0] );
+            return psrSerializer.toJson(components[0]);
         } else {
-            return psrSerializer.toJson( new TextComponent( components ) );
+            return psrSerializer.toJson(new TextComponent(components));
         }
     }