Fixes

Author: KCodeYT

src/main/java/de/kcodeyt/headsdb/database/Database.java

@@ -20,6 +20,7 @@
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.util.*;
+import java.util.stream.Collectors;
 
 @Getter
 public class Database {
@@ -53,7 +54,8 @@ public boolean load() {
                 if(connection.getResponseCode() == 200) {
                     try(final InputStream inputStream = connection.getInputStream();
                         final Reader reader = new InputStreamReader(inputStream)) {
-                        final List<HeadEntry> headEntries = GSON.<List<HeadEntry>>fromJson(reader, List.class);
+                        final List<Map<String, String>> values = GSON.<List<Map<String, String>>>fromJson(reader, List.class);
+                        final List<HeadEntry> headEntries = values.stream().map(map -> new HeadEntry(map.get("name"), map.get("uuid"), map.get("value"))).collect(Collectors.toList());
                         this.headEntries.addAll(headEntries);
                         this.categories.add(new Category(category, category.getDisplayName(), Iterables.getLast(headEntries).getTexture(), Collections.unmodifiableList(headEntries)));
                     }

src/main/java/de/kcodeyt/headsdb/database/HeadEntry.java

@@ -1,16 +1,16 @@
 package de.kcodeyt.headsdb.database;
 
 import lombok.Getter;
-import lombok.NoArgsConstructor;
+import lombok.RequiredArgsConstructor;
 import lombok.ToString;
 
 @Getter
 @ToString
-@NoArgsConstructor
+@RequiredArgsConstructor
 public class HeadEntry {
 
-    private final String name = null;
-    private final String id = null;
-    private final String texture = null;
+    private final String name;
+    private final String id;
+    private final String texture;
 
 }

src/main/java/de/kcodeyt/headsdb/util/FormAPI.java

@@ -1,16 +1,20 @@
 package de.kcodeyt.headsdb.util;
 
 import cn.nukkit.Player;
+import cn.nukkit.Server;
 import cn.nukkit.event.EventHandler;
 import cn.nukkit.event.Listener;
 import cn.nukkit.event.player.PlayerFormRespondedEvent;
 import cn.nukkit.event.player.PlayerQuitEvent;
 import cn.nukkit.form.window.FormWindow;
+import cn.nukkit.plugin.PluginManager;
 import cn.nukkit.scheduler.TaskHandler;
+import de.kcodeyt.headsdb.HeadsDB;
 
 import java.lang.reflect.Field;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 public class FormAPI {
 
@@ -22,6 +26,8 @@ public static void create(Player player, FormWindow formWindow, Runnable onRespo
 
     public static class FormListener implements Listener {
 
+        private static final AtomicBoolean INITIATED = new AtomicBoolean(false);
+
         @EventHandler
         public void onForm(PlayerFormRespondedEvent event) {
             this.handle(event.getWindow(), false);
@@ -54,10 +60,21 @@ private static class Handler {
         private final TaskHandler taskHandler;
 
         private Handler(Player player, FormWindow formWindow, Runnable runnable) {
+            final Server server = player.getServer();
             this.runnable = runnable;
+            this.taskHandler = server.getScheduler().scheduleDelayedRepeatingTask(null, player::sendExperience, 3, 3);
+
             player.showFormWindow(formWindow);
-            this.taskHandler = player.getServer().getScheduler().scheduleDelayedRepeatingTask(null, player::sendExperience, 3, 3);
             HANDLERS.put(formWindow, this);
+            if(!FormListener.INITIATED.get()) {
+                FormListener.INITIATED.set(true);
+                final PluginManager pluginManager = server.getPluginManager();
+                pluginManager.registerEvents(new FormListener(),
+                        pluginManager.getPlugins().values().stream().
+                                filter(plugin -> plugin instanceof HeadsDB).
+                                findAny().
+                                orElseThrow(RuntimeException::new));
+            }
         }
 
         private void handle(boolean isQuit) {

src/main/java/de/kcodeyt/headsdb/util/HeadRender.java

@@ -7,10 +7,9 @@
 public class HeadRender {
 
     private static final String URL = "https://mc-heads.net/head/";
-    private static final int SIZE = 256;
 
     private static String createUrl(String texture) {
-        return URL + SkinAPI.fromBase64(texture).substring(Mojang.TEXTURES.length()) + "/" + SIZE;
+        return URL + SkinAPI.fromBase64(texture).substring(Mojang.TEXTURES.length()) + ".png";
     }
 
     public static ElementButtonImageData createButtonImage(String texture) {