packets: Add packet listener

libraries/packets/packets-api/src/main/java/de/oliver/fancysitula/api/packets/FS_ServerboundCustomClickActionPacket.java

@@ -0,0 +1,30 @@
+package de.oliver.fancysitula.api.packets;
+
+import net.kyori.adventure.key.Key;
+
+import java.util.Optional;
+
+public class FS_ServerboundCustomClickActionPacket extends FS_ServerboundPacket {
+
+    private final Key id;
+    private final Optional<String> payload;
+
+    public FS_ServerboundCustomClickActionPacket(Type type, Key id, Optional<String> payload) {
+        super(type);
+        this.id = id;
+        this.payload = payload;
+    }
+
+    public Key getId() {
+        return id;
+    }
+
+    public Optional<String> getPayload() {
+        return payload;
+    }
+
+    @Override
+    public Type getType() {
+        return super.getType();
+    }
+}

libraries/packets/packets-api/src/main/java/de/oliver/fancysitula/api/packets/FS_ServerboundPacket.java

@@ -0,0 +1,30 @@
+package de.oliver.fancysitula.api.packets;
+
+public abstract class FS_ServerboundPacket {
+
+    protected final Type type;
+
+    public FS_ServerboundPacket(Type type) {
+        this.type = type;
+    }
+
+    public Type getType() {
+        return type;
+    }
+
+    public enum Type {
+        ALL("*"),
+        CUSTOM_CLICK_ACTION("ServerboundCustomClickActionPacket"),
+        ;
+
+        private String packetClassName;
+
+        Type(String packetClassName) {
+            this.packetClassName = packetClassName;
+        }
+
+        public String getPacketClassName() {
+            return packetClassName;
+        }
+    }
+}

libraries/packets/packets-api/src/main/java/de/oliver/fancysitula/api/utils/FS_PacketListener.java

@@ -0,0 +1,35 @@
+package de.oliver.fancysitula.api.utils;
+
+import de.oliver.fancysitula.api.packets.FS_ServerboundPacket;
+import org.bukkit.entity.Player;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Consumer;
+
+public abstract class FS_PacketListener {
+
+    protected final FS_ServerboundPacket.Type packet;
+    protected final List<Consumer<PacketReceivedEvent>> listeners;
+
+    public FS_PacketListener(FS_ServerboundPacket.Type packet) {
+        this.packet = packet;
+        this.listeners = new ArrayList<>();
+    }
+
+    public abstract void inject(Player player);
+
+    public void addListener(Consumer<PacketReceivedEvent> listener) {
+        listeners.add(listener);
+    }
+
+    public FS_ServerboundPacket.Type getPacket() {
+        return packet;
+    }
+
+    public record PacketReceivedEvent(
+            FS_ServerboundPacket packet,
+            Player player
+    ) {
+    }
+}