Add forge server mod for ReplayRestrictions (fixes #102)

src/main/java/com/replaymod/restrictions/ReplayModRestrictions.java

@@ -0,0 +1,95 @@
+package com.replaymod.restrictions;
+
+import com.replaymod.core.SettingsRegistry;
+import com.replaymod.core.utils.Restrictions;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.ChannelDuplexHandler;
+import io.netty.channel.ChannelFutureListener;
+import io.netty.channel.ChannelHandler;
+import net.minecraft.network.PacketBuffer;
+import net.minecraftforge.common.config.Configuration;
+import net.minecraftforge.fml.common.FMLCommonHandler;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.common.event.FMLInitializationEvent;
+import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
+import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
+import net.minecraftforge.fml.common.eventhandler.EventBus;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.common.gameevent.PlayerEvent;
+import net.minecraftforge.fml.common.network.FMLEmbeddedChannel;
+import net.minecraftforge.fml.common.network.FMLOutboundHandler;
+import net.minecraftforge.fml.common.network.NetworkRegistry;
+import net.minecraftforge.fml.common.network.internal.FMLProxyPacket;
+import net.minecraftforge.fml.relauncher.Side;
+import org.apache.logging.log4j.Logger;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+@Mod(modid = ReplayModRestrictions.MOD_ID,
+        version = "@MOD_VERSION@",
+        acceptedMinecraftVersions = "@MC_VERSION@",
+        acceptableRemoteVersions = "*",
+        serverSideOnly = true,
+        useMetadata = true)
+public class ReplayModRestrictions {
+    public static final String MOD_ID = "replaymod-restrictions";
+
+    public static Logger LOGGER;
+
+    private final SettingsRegistry settingsRegistry = new SettingsRegistry();
+    private FMLEmbeddedChannel channel;
+
+    @Mod.EventHandler
+    public void preInit(FMLPreInitializationEvent event) {
+        LOGGER = event.getModLog();
+
+        Configuration config = new Configuration(event.getSuggestedConfigurationFile());
+        config.load();
+        settingsRegistry.setConfiguration(config);
+
+        settingsRegistry.register(Setting.class);
+    }
+
+    @Mod.EventHandler
+    public void init(FMLInitializationEvent event) {
+        EventBus bus = FMLCommonHandler.instance().bus();
+        bus.register(this);
+
+        channel = NetworkRegistry.INSTANCE.newChannel(Restrictions.PLUGIN_CHANNEL, new RestrictionsChannelHandler()).get(Side.SERVER);
+    }
+
+    @Mod.EventHandler
+    public void postInit(FMLPostInitializationEvent event) throws IOException {
+        settingsRegistry.save(); // Save default values to disk
+    }
+
+    @ChannelHandler.Sharable
+    private static class RestrictionsChannelHandler extends ChannelDuplexHandler {}
+
+    @SubscribeEvent
+    public void onUserJoin(PlayerEvent.PlayerLoggedInEvent event) {
+        Map<String, byte[]> restrictions = new HashMap<>();
+        if (settingsRegistry.get(Setting.NO_XRAY)) restrictions.put("no_xray", new byte[0]);
+        if (settingsRegistry.get(Setting.NO_NOCLIP)) restrictions.put("no_noclip", new byte[0]);
+        if (settingsRegistry.get(Setting.ONLY_FIRST_PERSON)) restrictions.put("only_first_person", new byte[0]);
+        if (settingsRegistry.get(Setting.ONLY_RECORDING_PLAYER)) restrictions.put("only_recording_player", new byte[0]);
+        if (settingsRegistry.get(Setting.HIDE_COORDINATES)) restrictions.put("hide_coordinates", new byte[0]);
+
+        PacketBuffer buf = new PacketBuffer(Unpooled.buffer());
+        for (Map.Entry<String, byte[]> e : restrictions.entrySet()) {
+            byte[] bytes = e.getKey().getBytes();
+            buf.writeByte(bytes.length);
+            buf.writeBytes(bytes);
+            buf.writeByte(1);
+            buf.writeBytes(e.getValue());
+        }
+
+        FMLProxyPacket packet = new FMLProxyPacket(buf, Restrictions.PLUGIN_CHANNEL);
+
+        channel.attr(FMLOutboundHandler.FML_MESSAGETARGET).set(FMLOutboundHandler.OutboundTarget.PLAYER);
+        channel.attr(FMLOutboundHandler.FML_MESSAGETARGETARGS).set(event.player);
+        channel.writeAndFlush(packet).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+    }
+}