openrs2/game/src/main/kotlin/org/openrs2/game/net/jaggrab/JaggrabChannelHandler.kt

package org.openrs2.game.net.jaggrab

import io.netty.channel.ChannelFutureListener
import io.netty.channel.ChannelHandler
import io.netty.channel.ChannelHandlerContext
import io.netty.channel.SimpleChannelInboundHandler
import org.openrs2.game.net.FileProvider
import org.openrs2.protocol.jaggrab.JaggrabRequest
import javax.inject.Inject
import javax.inject.Singleton

@Singleton
@ChannelHandler.Sharable
public class JaggrabChannelHandler @Inject constructor(
    private val fileProvider: FileProvider
) : SimpleChannelInboundHandler<JaggrabRequest>() {
    override fun handlerAdded(ctx: ChannelHandlerContext) {
        ctx.read()
    }

    override fun channelRead0(ctx: ChannelHandlerContext, msg: JaggrabRequest) {
        val file = fileProvider.get(msg.path)
        if (file == null) {
            ctx.close()
            return
        }

        ctx.write(file).addListener(ChannelFutureListener.CLOSE)
    }

    override fun channelReadComplete(ctx: ChannelHandlerContext) {
        ctx.flush()
    }
}