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/*
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* Copyright 2019-2022 Mamoe Technologies and contributors.
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*
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* 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
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* Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
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*
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* https://github.com/mamoe/mirai/blob/dev/LICENSE
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*/
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package net.mamoe.mirai.internal.message.protocol.encode
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import net.mamoe.mirai.contact.Contact
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import net.mamoe.mirai.contact.Group
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import net.mamoe.mirai.contact.getMember
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import net.mamoe.mirai.contact.nameCardOrNick
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import net.mamoe.mirai.message.data.*
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import net.mamoe.mirai.message.data.visitor.MessageVisitor
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import net.mamoe.mirai.message.data.visitor.RecursiveMessageVisitor
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import net.mamoe.mirai.message.data.visitor.accept
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import net.mamoe.mirai.utils.toLongUnsigned
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import kotlin.jvm.JvmStatic
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import kotlin.math.log10
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/**
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* An object that stores these length properties.
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* @see MessageLengthVerifier
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*/
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internal interface MessageLengthTokens {
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val uiChars: Long
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val uiImages: Long
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val uiForwardNodes: Long
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// val protocolTotal: Long
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companion object {
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val comparator: Comparator<MessageLengthTokens> =
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compareBy<MessageLengthTokens> { it.uiChars }
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.then(compareBy { it.uiImages })
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.then(compareBy { it.uiForwardNodes })
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// .then(compareBy { it.protocolTotal })
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}
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}
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/**
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* A [MessageVisitor] that calculates and verifies length of a message.
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*
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* Can be applied to any [Message] by calling[Message.accept] passing this visitor.
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*
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* Applying to [ForwardMessage] verifies the [ForwardMessage] itself and its nodes recursively.
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*
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* Use properties from [MessageLengthTokens] to retrieve calculation results.
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* @since 2.14
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*/
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internal interface MessageLengthVerifier : MessageVisitor<Unit, Unit>, MessageLengthTokens {
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val nestedVerifiers: List<MessageLengthVerifier>
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fun isLengthValid(): Boolean
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}
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/**
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* Gets an [MessageLengthVerifier] with specified configuration [lengthTokens] and [context].
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*/
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internal fun MessageLengthVerifier(
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context: Contact?,
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lengthTokens: MessageLengthLimits,
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failfast: Boolean,
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): MessageLengthVerifier {
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return MessageLengthVerifierImpl(context, lengthTokens, failfast)
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}
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/**
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* Specifies length limits for [MessageLengthVerifier]
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* @sample net.mamoe.mirai.internal.message.protocol.encode.MessageLengthVerifierTest
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*/
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internal class MessageLengthLimits(
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override val uiChars: Long = 5000,// 5000 chars
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override val uiImages: Long = 50,
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override val uiForwardNodes: Long = 200, // 200 nodes for each forward message
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// override val protocolTotal: Long = 1 * 1000 * 1000, // 1 MB
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) : MessageLengthTokens {
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companion object {
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@JvmStatic
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val DEFAULT = MessageLengthLimits()
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}
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}
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///////////////////////////////////////////////////////////////////////////
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// IMPLEMENTATION
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///////////////////////////////////////////////////////////////////////////
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private inline operator fun MessageLengthTokens.compareTo(other: MessageLengthTokens): Int =
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MessageLengthTokens.comparator.compare(this, other)
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internal class MessageLengthVerifierImpl constructor(
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private val context: Contact?,
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private val limits: MessageLengthLimits,
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private val failfast: Boolean,
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) : RecursiveMessageVisitor<Unit>(), MessageLengthVerifier {
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override val nestedVerifiers: MutableList<MessageLengthVerifierImpl> = mutableListOf()
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private var hasInvalidNested: Boolean = false
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/**
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* 展示在 UI 的字符长度.
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* @see MessageLengthLimits.uiChars
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*/
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override var uiChars: Long = 0
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private set
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override var uiImages: Long = 0
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private set
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override var uiForwardNodes: Long = 0
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private set
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override fun isFinished(): Boolean {
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if (!failfast) return false
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return !isLengthValid()
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}
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override fun isLengthValid(): Boolean = this <= limits && !hasInvalidNested
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override fun visitPlainText(message: PlainText, data: Unit) {
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uiChars += message.content.length
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}
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override fun visitAt(message: At, data: Unit) {
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val length = message.displayInGroup()
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?: message.target.numberOfDigitsInDecimal
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uiChars += length + 1 // + `@`
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}
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private fun At.displayInGroup(): Long? {
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return if (context is Group) {
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context.getMember(target)?.nameCardOrNick?.length?.toLongUnsigned()
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} else {
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null
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}
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}
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override fun visitAtAll(message: AtAll, data: Unit) {
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uiChars += message.content.length
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}
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override fun visitFace(message: Face, data: Unit) {
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uiChars += 4
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}
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override fun visitImage(message: Image, data: Unit) {
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uiImages++
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// protocolTotal = TypicalMessageSize.image
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}
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override fun visitFlashImage(message: FlashImage, data: Unit) {
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visitImage(message.image, data)
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}
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override fun visitQuoteReply(message: QuoteReply, data: Unit) {
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message.source.originalMessage.accept(this)
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}
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override fun visitForwardMessage(message: ForwardMessage, data: Unit) {
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val nested = MessageLengthVerifierImpl(context, limits, failfast)
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nestedVerifiers.add(nested)
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for (node in message.nodeList) {
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if (nested.isFinished()) break
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nested.visitForwardMessageNode(node)
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}
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if (!nested.isLengthValid()) {
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hasInvalidNested = true
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}
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}
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fun visitForwardMessageNode(node: ForwardMessage.INode) {
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uiForwardNodes++
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node.messageChain.accept(this)
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}
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companion object {
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val Long.numberOfDigitsInDecimal: Long
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get() = if (this == 0L) 1 else 1 + log10(this.toDouble()).toLong()
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}
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}
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//private object TypicalMessageSize {
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// @Serializable
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// private class Elements(
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// @ProtoNumber(1) val elements: List<ImMsgBody.Elem>
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// )
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//
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// val image: Long = kotlin.run {
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// val elems = MessageProtocolFacade.encode(
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// chain = Image("{01E9451B-70ED-EAE3-B37C-101F1EEBF5B5}.jpg").toMessageChain(),
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// messageTarget = null,
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// withGeneralFlags = false,
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// isForward = false
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// )
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// ProtoBuf.encodeToByteArray(Elements.serializer(), Elements(elems)).size.toLongUnsigned()
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// }
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//}
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@ -63,7 +63,7 @@ internal class ForwardMessageProtocol : MessageProtocol() {
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forward: ForwardMessage,
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contact: AbstractContact
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) {
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check(forward.nodeList.size <= 200) {
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check(forward.nodeList.size <= MAX_NODES) {
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throw MessageTooLargeException(
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contact, forward, forward,
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"ForwardMessage allows up to 200 nodes, but found ${forward.nodeList.size}"
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@ -71,4 +71,8 @@ internal class ForwardMessageProtocol : MessageProtocol() {
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}
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}
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}
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companion object {
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const val MAX_NODES : Int = 200
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}
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}
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@ -0,0 +1,258 @@
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/*
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* Copyright 2019-2022 Mamoe Technologies and contributors.
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*
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* 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
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* Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
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*
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* https://github.com/mamoe/mirai/blob/dev/LICENSE
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*/
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package net.mamoe.mirai.internal.message.protocol.encode
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import net.mamoe.mirai.contact.MemberPermission
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import net.mamoe.mirai.internal.MockBot
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import net.mamoe.mirai.internal.message.protocol.encode.MessageLengthVerifierImpl.Companion.numberOfDigitsInDecimal
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import net.mamoe.mirai.internal.notice.processors.GroupExtensions
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import net.mamoe.mirai.internal.test.AbstractTest
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import net.mamoe.mirai.message.data.*
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import net.mamoe.mirai.message.data.visitor.accept
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import kotlin.test.Test
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import kotlin.test.assertEquals
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import kotlin.test.assertFalse
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import kotlin.test.assertTrue
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/**
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* @see MessageLengthVerifier
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*/
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internal class MessageLengthVerifierTest : AbstractTest(), GroupExtensions {
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private val bot = MockBot { }
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private val group = bot.addGroup(123L, 1111L).apply {
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addMember(1111L, permission = MemberPermission.OWNER)
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}
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private companion object {
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private val fiveThousandChars = PlainText("a".repeat(5000))
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private val anImage =
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// [mirai:image:{9D97AF44-0007-5F86-6567-C0BD3F6A5C5C}.gif, width=211, height=243, size=108292, type=GIF, isEmoji=true]
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Image("{9D97AF44-0007-5F86-6567-C0BD3F6A5C5C}.gif") { // guess what it is?
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width = 211
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height = 243
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size = 108292
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type = ImageType.GIF
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isEmoji = true
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}
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}
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@Test
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fun numberOfDigitsInDecimal() {
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assertEquals(1, 0L.numberOfDigitsInDecimal)
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assertEquals(2, 10L.numberOfDigitsInDecimal)
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assertEquals(2, 11L.numberOfDigitsInDecimal)
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assertEquals(4, 1000L.numberOfDigitsInDecimal)
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assertEquals(4, 1001L.numberOfDigitsInDecimal)
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assertEquals(4, 1999L.numberOfDigitsInDecimal)
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}
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@Test
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fun `initial values`() {
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val limits = MessageLengthLimits(
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uiChars = 5000,
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uiImages = 50,
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uiForwardNodes = 200,
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)
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val verifier = MessageLengthVerifier(null, limits, failfast = false)
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assertEquals(0, verifier.uiChars)
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assertEquals(0, verifier.uiImages)
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assertEquals(0, verifier.uiForwardNodes)
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assertTrue(verifier.isLengthValid())
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}
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@Test
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fun `count PlainTexts`() {
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val limits = MessageLengthLimits(
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uiChars = 5000,
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uiImages = 50,
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uiForwardNodes = 200,
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)
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val verifier = MessageLengthVerifier(null, limits, failfast = false)
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val chain = messageChainOf(fiveThousandChars)
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chain.accept(verifier)
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assertEquals(5000, verifier.uiChars)
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assertEquals(0, verifier.uiImages)
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assertEquals(0, verifier.uiForwardNodes)
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}
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@Test
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fun `count Images`() {
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val limits = MessageLengthLimits(
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uiChars = 5000,
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uiImages = 50,
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uiForwardNodes = 200,
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)
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val verifier = MessageLengthVerifier(null, limits, failfast = false)
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val chain = messageChainOf(anImage, anImage)
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chain.accept(verifier)
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assertEquals(0, verifier.uiChars)
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assertEquals(2, verifier.uiImages)
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assertEquals(0, verifier.uiForwardNodes)
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}
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@Test
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fun `count Images and PlainTexts`() {
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val limits = MessageLengthLimits(
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uiChars = 5000,
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uiImages = 50,
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uiForwardNodes = 200,
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)
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val verifier = MessageLengthVerifier(null, limits, failfast = false)
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val chain = messageChainOf(fiveThousandChars, anImage)
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chain.accept(verifier)
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assertEquals(5000, verifier.uiChars)
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assertEquals(1, verifier.uiImages)
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assertEquals(0, verifier.uiForwardNodes)
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}
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@Test
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fun failfast() {
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val limits = MessageLengthLimits(
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uiChars = 5000,
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uiImages = 50,
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uiForwardNodes = 200,
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)
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val verifier = MessageLengthVerifier(null, limits, failfast = true)
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val chain = messageChainOf(fiveThousandChars, anImage, fiveThousandChars, fiveThousandChars, anImage)
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chain.accept(verifier)
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assertEquals(fiveThousandChars.content.length * 2L, verifier.uiChars)
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assertEquals(1, verifier.uiImages)
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assertEquals(0, verifier.uiForwardNodes)
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assertFalse(verifier.isLengthValid())
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}
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@Test
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fun `disable failfast`() {
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val limits = MessageLengthLimits(
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uiChars = 5000,
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uiImages = 50,
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uiForwardNodes = 200,
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)
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val verifier = MessageLengthVerifier(null, limits, failfast = false)
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val chain = messageChainOf(fiveThousandChars, anImage, fiveThousandChars, fiveThousandChars, anImage)
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chain.accept(verifier)
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assertEquals(fiveThousandChars.content.length * 3L, verifier.uiChars)
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assertEquals(2, verifier.uiImages)
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assertEquals(0, verifier.uiForwardNodes)
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assertFalse(verifier.isLengthValid())
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}
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@Test
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fun `limits are inclusive`() {
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val limits = MessageLengthLimits(
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uiChars = 5000,
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uiImages = 50,
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uiForwardNodes = 200,
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)
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val verifier = MessageLengthVerifier(null, limits, failfast = true)
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val chain = messageChainOf(fiveThousandChars, anImage)
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chain.accept(verifier)
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assertEquals(5000, verifier.uiChars)
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assertEquals(1, verifier.uiImages)
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assertEquals(0, verifier.uiForwardNodes)
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assertTrue(verifier.isLengthValid())
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}
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@Test
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fun `count recursively ForwardMessage nodes`() {
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val limits = MessageLengthLimits(
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uiChars = 5000,
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uiImages = 50,
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uiForwardNodes = 200,
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)
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val verifier = MessageLengthVerifier(null, limits, failfast = false)
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val chain = messageChainOf(buildForwardMessage(group) {
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1111 says fiveThousandChars
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1111 says anImage
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1111 says fiveThousandChars
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1111 says fiveThousandChars
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1111 says anImage
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})
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chain.accept(verifier)
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assertEquals(fiveThousandChars.content.length * 3L, verifier.uiChars)
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assertEquals(2, verifier.uiImages)
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assertEquals(5, verifier.uiForwardNodes)
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assertFalse(verifier.isLengthValid())
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}
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@Test
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fun `count deeply recursively ForwardMessage nodes`() {
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val limits = MessageLengthLimits(
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uiChars = 5000,
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uiImages = 50,
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uiForwardNodes = 200,
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)
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val verifier = MessageLengthVerifier(null, limits, failfast = false)
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val chain = messageChainOf(buildForwardMessage(group) {
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1111 says fiveThousandChars
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1111 says anImage
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1111 says fiveThousandChars
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1111 says fiveThousandChars
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1111 says anImage
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1111 says buildForwardMessage(group) {
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1111 says fiveThousandChars
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1111 says anImage
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1111 says fiveThousandChars
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1111 says fiveThousandChars
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1111 says anImage
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}
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})
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chain.accept(verifier)
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assertEquals(fiveThousandChars.content.length * 3L * 2, verifier.uiChars)
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assertEquals(2 * 2, verifier.uiImages)
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assertEquals(6 + 5, verifier.uiForwardNodes)
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assertFalse(verifier.isLengthValid())
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}
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@Test
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fun `count deeply recursively ForwardMessage nodes failfast`() {
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val limits = MessageLengthLimits(
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uiChars = 5000,
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uiImages = 50,
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uiForwardNodes = 200,
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)
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val verifier = MessageLengthVerifier(null, limits, failfast = true)
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val chain = messageChainOf(buildForwardMessage(group) {
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1111 says fiveThousandChars
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1111 says anImage
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1111 says fiveThousandChars
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1111 says fiveThousandChars
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1111 says anImage
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1111 says buildForwardMessage(group) {
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1111 says fiveThousandChars
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1111 says anImage
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1111 says fiveThousandChars
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1111 says fiveThousandChars
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1111 says anImage
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}
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})
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chain.accept(verifier)
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assertEquals(fiveThousandChars.content.length * 1L, verifier.uiChars)
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assertEquals(1, verifier.uiImages)
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assertEquals(2, verifier.uiForwardNodes)
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assertFalse(verifier.isLengthValid())
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}
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}
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