62 lines
1.8 KiB
Kotlin
62 lines
1.8 KiB
Kotlin
/*
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* Copyright © 2026 RTAkland
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* Author: RTAkland
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* Date: 2026/9/7
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*/
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package test
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import cn.rtast.libmc.primitives.FixedBitSet20
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import cn.rtast.libmc.primitives.createFixedBitSet20
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import cn.rtast.libmc.stream.BytesBuffer
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import kotlin.uuid.Uuid
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class ClientChatTracker {
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private val lastSeenQueue = ArrayDeque<ByteArray>(20)
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var pendingMessageCount: Int = 0
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private set
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fun onReceivePlayerChat(signature: ByteArray?) {
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if (signature == null || signature.size != 256) return
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if (lastSeenQueue.size >= 20) lastSeenQueue.removeFirst()
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lastSeenQueue.addLast(signature)
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pendingMessageCount++
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}
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fun prepareForOutgoingMessage(): ChatStateSnapshot {
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val signatures = lastSeenQueue.toList()
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val count = pendingMessageCount
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pendingMessageCount = 0
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return ChatStateSnapshot(signatures, count)
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}
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}
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data class ChatStateSnapshot(val lastSeenSignatures: List<ByteArray>, val messageCount: Int)
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fun createAcknowledgedBitSet(lastSeenSignatures: List<ByteArray>): FixedBitSet20 {
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val bitSet = createFixedBitSet20()
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for (i in lastSeenSignatures.indices) {
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if (i >= 20) break
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bitSet[i] = true
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}
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return bitSet
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}
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object ChatPacketUtils {
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fun computeByteArrayHashCode(bytes: ByteArray): Int {
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var result = 1
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for (element in bytes) result = 31 * result + element.toInt()
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return result
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}
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fun computePacketChecksum(lastSeenSignatures: List<ByteArray>): Byte {
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var combinedHash = 1
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for (sig in lastSeenSignatures) {
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val sigHash = computeByteArrayHashCode(sig)
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combinedHash = 31 * combinedHash + sigHash
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}
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val resultByte = combinedHash.toByte()
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return if (resultByte == 0.toByte()) 1.toByte() else resultByte
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}
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} |