better naming for client/server only handlers

src/main/java/ru/bclib/api/dataexchange/BaseDataHandler.java

@@ -0,0 +1,98 @@
+package ru.bclib.api.dataexchange;
+
+import net.fabricmc.api.EnvType;
+import net.fabricmc.api.Environment;
+import net.fabricmc.fabric.api.networking.v1.PacketSender;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.multiplayer.ClientPacketListener;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.network.ServerGamePacketListenerImpl;
+import org.jetbrains.annotations.NotNull;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+
+public abstract class BaseDataHandler {
+	private final boolean originatesOnServer;
+	@NotNull
+	private final ResourceLocation identifier;
+	
+	protected BaseDataHandler(ResourceLocation identifier, boolean originatesOnServer) {
+		this.originatesOnServer = originatesOnServer;
+		this.identifier = identifier;
+	}
+	
+	final public boolean getOriginatesOnServer() {
+		return originatesOnServer;
+	}
+	
+	final public ResourceLocation getIdentifier() {
+		return identifier;
+	}
+	
+	@Environment(EnvType.CLIENT)
+	abstract void receiveFromServer(Minecraft client, ClientPacketListener handler, FriendlyByteBuf buf, PacketSender responseSender);
+	
+	private ServerPlayer lastMessageSender;
+	
+	void receiveFromClient(MinecraftServer server, ServerPlayer player, ServerGamePacketListenerImpl handler, FriendlyByteBuf buf, PacketSender responseSender) {
+		lastMessageSender = player;
+	}
+	
+	final protected boolean reply(BaseDataHandler message, MinecraftServer server) {
+		if (lastMessageSender == null) return false;
+		message.sendToClient(server, lastMessageSender);
+		return true;
+	}
+	
+	abstract void sendToClient(MinecraftServer server);
+	
+	abstract void sendToClient(MinecraftServer server, ServerPlayer player);
+	
+	@Environment(EnvType.CLIENT)
+	abstract void sendToServer(Minecraft client);
+	
+	
+	@Override
+	public String toString() {
+		return "BasDataHandler{" + "originatesOnServer=" + originatesOnServer + ", identifier=" + identifier + '}';
+	}
+	
+	/**
+	 * Write a String to a buffer (Convenience Method)
+	 *
+	 * @param buf The buffer to write to
+	 * @param s   The String you want to write
+	 */
+	public static void writeString(FriendlyByteBuf buf, String s) {
+		buf.writeByteArray(s.getBytes(StandardCharsets.UTF_8));
+	}
+	
+	/**
+	 * Read a string from a buffer (Convenience Method)
+	 *
+	 * @param buf Thea buffer to read from
+	 * @return The received String
+	 */
+	public static String readString(FriendlyByteBuf buf) {
+		byte[] data = buf.readByteArray();
+		return new String(data, StandardCharsets.UTF_8);
+	}
+	
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) return true;
+		if (!(o instanceof BaseDataHandler)) return false;
+		BaseDataHandler that = (BaseDataHandler) o;
+		return originatesOnServer == that.originatesOnServer && identifier.equals(that.identifier);
+	}
+	
+	@Override
+	public int hashCode() {
+		return Objects.hash(originatesOnServer, identifier);
+	}
+}
+