Readded the notice feature

src/main/java/de/kwantux/networks/Main.java

@@ -2,6 +2,7 @@
 
 import de.kwantux.networks.commands.NetworksCommandManager;
 import de.kwantux.networks.component.util.FilterTranslator;
+import de.kwantux.networks.event.NoticeListener;
 import de.kwantux.networks.utils.DoubleChestUtils;
 import de.kwantux.networks.utils.FoliaUtils;
 import de.kwantux.networks.utils.Metrics;
@@ -127,6 +128,7 @@ public void onEnable() {
         new BlockBreakListener(this);
         new WandListener(this);
         new PlayerJoinListener(this);
+        new NoticeListener(this);
 
         if (FoliaUtils.folia) {
             logger.warning("Folia support on Networks is still in beta, please report any bugs.");

src/main/java/de/kwantux/networks/config/Config.java

@@ -67,7 +67,10 @@ public Config(Main main) throws SerializationException {
     }
 
     public static boolean blastProofComponents; // TODO: Blast proof components
-    public static boolean noticeEnabled; // TODO: Notice message
+    /**
+     * Whether players that don't have a network should get a notification when opening a full chest
+     */
+    public static boolean noticeEnabled;
     public static boolean humanReadableJson;
     public static boolean archiveNetworksOnDelete;
     public static boolean requestOwnershipTransfers;

src/main/java/de/kwantux/networks/event/NoticeListener.java

@@ -0,0 +1,32 @@
+package de.kwantux.networks.event;
+
+import de.kwantux.networks.Main;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.InventoryCloseEvent;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+import static de.kwantux.networks.Main.mgr;
+import static de.kwantux.networks.Main.lang;
+
+public class NoticeListener implements Listener {
+
+    private List<UUID> notices = new ArrayList<>();
+
+    public NoticeListener(Main plugin) {
+        plugin.getServer().getPluginManager().registerEvents(this, plugin);
+    }
+
+    @EventHandler
+    public void onInventoryOpen(InventoryCloseEvent event) {
+        if (event.getInventory().firstEmpty() != -1) return;
+        if (notices.contains(event.getPlayer().getUniqueId())) return;
+        if (mgr.withUser(event.getPlayer().getUniqueId()).isEmpty()) {
+            notices.add(event.getPlayer().getUniqueId());
+            lang.message(event.getPlayer(), "notice");
+        }
+    }
+}