Add lecterns

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

@@ -0,0 +1,73 @@
+package electroblob.wizardry.packet;
+
+import electroblob.wizardry.Wizardry;
+import electroblob.wizardry.spell.Spell;
+import electroblob.wizardry.tileentity.TileEntityLectern;
+import io.netty.buffer.ByteBuf;
+import net.minecraft.entity.player.EntityPlayerMP;
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.math.BlockPos;
+import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
+import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
+import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
+
+/** <b>[Client -> Server]</b> This packet is sent when a player closes the lectern GUI to send the last-viewed spell to
+ * the server. */
+public class PacketLectern implements IMessageHandler<PacketLectern.Message, IMessage> {
+
+	@Override
+	public IMessage onMessage(Message message, MessageContext ctx){
+
+		// Just to make sure that the side is correct
+		if(ctx.side.isServer()){
+
+			final EntityPlayerMP player = ctx.getServerHandler().player;
+
+			player.getServerWorld().addScheduledTask(() -> {
+
+				TileEntity tileentity = player.world.getTileEntity(message.pos);
+
+				if(tileentity instanceof TileEntityLectern){
+
+					((TileEntityLectern)tileentity).currentSpell = message.spell;
+					((TileEntityLectern)tileentity).sync(); // Update other clients with the new state
+
+				}else{
+					Wizardry.logger.warn("Received a PacketLectern, but no lectern existed at the position specified!");
+				}
+
+			});
+		}
+
+		return null;
+	}
+
+	public static class Message implements IMessage {
+
+		private BlockPos pos;
+		private Spell spell;
+
+		// This constructor is required otherwise you'll get errors (used somewhere in fml through reflection)
+		public Message(){}
+
+		public Message(BlockPos pos, Spell spell){
+			this.pos = pos;
+			this.spell = spell;
+		}
+
+		@Override
+		public void fromBytes(ByteBuf buf){
+			// The order is important
+			pos = new BlockPos(buf.readInt(), buf.readInt(), buf.readInt());
+			spell = Spell.byNetworkID(buf.readInt());
+		}
+
+		@Override
+		public void toBytes(ByteBuf buf){
+			buf.writeInt(pos.getX());
+			buf.writeInt(pos.getY());
+			buf.writeInt(pos.getZ());
+			buf.writeInt(spell.networkID());
+		}
+	}
+}

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

@@ -31,6 +31,7 @@ public class WizardryPacketHandler {
 		registerMessage(PacketEmitterData.class, PacketEmitterData.Message.class);
 		registerMessage(PacketPossession.class, PacketPossession.Message.class);
 		registerMessage(PacketConquerShrine.class, PacketConquerShrine.Message.class);
+		registerMessage(PacketLectern.class, PacketLectern.Message.class);
 	}
 
 	private static int nextPacketId = 0;