Add donor perks and tweak generalise rendering of healing totem

src/main/java/electroblob/wizardry/packet/PacketSyncDonationPerks.java

@@ -0,0 +1,55 @@
+package electroblob.wizardry.packet;
+
+import electroblob.wizardry.constants.Element;
+import electroblob.wizardry.misc.DonationPerksHandler;
+import io.netty.buffer.ByteBuf;
+import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
+import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
+import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * <b>[Server -> Client]</b> This packet is sent to update the donation perks map for each player that logs in, and for
+ * all players whenever the map changes.
+ */
+public class PacketSyncDonationPerks implements IMessageHandler<PacketSyncDonationPerks.Message, IMessage> {
+
+	@Override
+	public IMessage onMessage(Message message, MessageContext ctx){
+
+		// Just to make sure that the side is correct
+		if(ctx.side.isClient()){
+			// Using a fully qualified name is a good course of action here; we don't really want to clutter the proxy
+			// methods any more than necessary.
+			net.minecraft.client.Minecraft.getMinecraft().addScheduledTask(() -> DonationPerksHandler.setElements(message.elements));
+		}
+
+		return null;
+	}
+
+	public static class Message implements IMessage {
+
+		public List<Element> elements;
+
+		// This constructor is required otherwise you'll get errors (used somewhere in fml through reflection)
+		public Message(){}
+
+		public Message(List<Element> elements){
+			this.elements = elements;
+		}
+
+		@Override
+		public void fromBytes(ByteBuf buf){
+			// The order is important
+			this.elements = new ArrayList<>();
+			while(buf.isReadable()) elements.add(Element.values()[buf.readShort()]);
+		}
+
+		@Override
+		public void toBytes(ByteBuf buf){
+			for(Element element : elements) buf.writeShort(element.ordinal());
+		}
+	}
+}