package net.md_5.bungee.forge;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import com.google.common.base.Charsets;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import net.md_5.bungee.protocol.DefinedPacket;
import net.md_5.bungee.protocol.packet.PluginMessage;
public class ForgeUtils
{
/**
* Gets the registered FML channels from the packet.
*
* @param pluginMessage The packet representing FMLProxyPacket.
* @return The registered channels.
*/
public static Set<String> readRegisteredChannels(PluginMessage pluginMessage)
{
String channels = new String( pluginMessage.getData(), Charsets.UTF_8 );
String[] split = channels.split( "\0" );
Set<String> channelSet = ImmutableSet.copyOf( split );
return channelSet;
}
/**
* Gets the modlist from the packet.
*
* @param pluginMessage The packet representing FMLProxyPacket.
* @return The modlist.
*/
public static Map<String, String> readModList(PluginMessage pluginMessage)
{
Map<String, String> modTags = Maps.newHashMap();
ByteBuf payload = Unpooled.wrappedBuffer( pluginMessage.getData() );
byte discriminator = payload.readByte();
if ( discriminator == 2 ) // ModList
{
ByteBuf buffer = payload.slice();
int modCount = DefinedPacket.readVarInt( buffer, 2 );
for ( int i = 0; i < modCount; i++ )
{
modTags.put( DefinedPacket.readString( buffer ), DefinedPacket.readString( buffer ) );
}
}
return modTags;
}
/**
* Get the build number of FML from the packet.
*
* @param modList The modlist, as a Map.
* @return The build number, or 0 if it failed.
*/
public static int getFmlBuildNumber(Map<String, String> modList)
{
if ( modList.containsKey( "FML" ) )
{
Matcher matcher = ForgeConstants.FML_HANDSHAKE_VERSION_REGEX.matcher( modList.get( "FML" ) );
if ( matcher.find() )
{
// We know from the regex that we have an int.
return Integer.parseInt( matcher.group( 4 ) );
}
}
return 0;
}
}