Rename module name and add dm-codec module to serialization/deserialization dm message

bl-dm-codec/README.md

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+dm codec
+
+WIP

bl-dm-codec/build.gradle.kts

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+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
+plugins {
+    kotlin("multiplatform")
+    kotlin("plugin.serialization")
+}
+
+kotlin {
+    explicitApi()
+
+    linuxX64()
+    linuxArm64()
+    macosArm64()
+    mingwX64()
+    jvm { compilerOptions.jvmTarget = JvmTarget.JVM_11 }
+
+    sourceSets {
+        commonMain.dependencies {
+            api(project(":bl-codec"))
+            api("org.jetbrains.kotlinx:kotlinx-serialization-protobuf:1.11.0")
+        }
+
+        commonTest.dependencies {
+            implementation(kotlin("test"))
+            implementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.11.0")
+        }
+    }
+}

bl-dm-codec/src/commonMain/kotlin/cn/rtast/bldm/dm/codec/InteractWordV2.kt

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+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/8/30
+ */
+
+
+package cn.rtast.bldm.dm.codec
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+public data class InteractWordV2(
+    override val origin: String,
+    @ReverseEnginedProtobuf override val reversed: InteractWordPbPayload,
+    val dmScore: Int,
+) : _ReversedProtobufClass<InteractWordV2.InteractWordPbPayload> {
+    @Serializable
+    public data class InteractWordPbPayload(
+        val uid: Long,
+        val unameBytes: Map<String, Int>,
+        val actionType: Int,
+        val roomId: Long,
+        val timestampSec: Long,
+        val timestampMs: Long,
+        val identityType: Int,
+        val unameColor: String,
+        val sourceBytes: Map<String, Int>,
+        val msgId: ULong,
+        val userInfo: UserInfo,
+    )
+
+    @Serializable
+    public data class UserInfo(
+        val uid: Long,
+        val userDetail: UserDetail,
+    )
+
+    @Serializable
+    public data class UserDetail(
+        val faceUrl: String,
+    )
+}

bl-dm-codec/src/commonMain/kotlin/cn/rtast/bldm/dm/codec/OnlineRankCount.kt

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+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/8/30
+ */
+
+
+package cn.rtast.bldm.dm.codec
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+public data class OnlineRankCount(
+    val count: Int,
+    val countText: String,
+    val onlineCount: Int,
+    val onlineCountText: String,
+)

bl-dm-codec/src/commonMain/kotlin/cn/rtast/bldm/dm/codec/OnlineRankV3.kt

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+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/8/30
+ */
+
+
+package cn.rtast.bldm.dm.codec
+
+import kotlinx.serialization.Serializable
+
+/**
+ * this data class defined
+ */
+@Serializable
+public data class OnlineRankV3(
+    override val origin: String,
+    @ReverseEnginedProtobuf override val reversed: ReversedProtobuf,
+) : _ReversedProtobufClass<OnlineRankV3.ReversedProtobuf> {
+    @Serializable
+    public data class ReversedProtobuf(
+        /**
+         * rank type
+         * `online_rank`
+         */
+        val rankType: String,
+        val userRankInfo: List<UserRankInfo>,
+    )
+
+    @Serializable
+    public data class UserRankInfo(
+        val uid: Long,
+        val avatarUrl: String,
+        val scoreInfo: UserScore,
+        val nickname: String,
+        val rank: Int,
+        val accountDetail: AccountDetail,
+    )
+
+    @Serializable
+    public data class UserScore(
+        val score: Int,
+    )
+
+    @Serializable
+    public data class AccountDetail(
+        val uid: Long,
+        val profile: ProfileCard,
+    )
+
+    @Serializable
+    public data class ProfileCard(
+        val nickname: String,
+        val faceUrl: String,
+        val avatarMedia: MediaInfo,
+        val iconMedia: MediaInfo,
+        val extraFlags: ExtraFlags,
+    )
+
+    @Serializable
+    public data class MediaInfo(
+        val nickname: String,
+        val avatarUrl: String,
+    )
+
+    @Serializable
+    public data class ExtraFlags(
+        val flagValue: Long,
+    )
+}

bl-dm-codec/src/commonMain/kotlin/cn/rtast/bldm/dm/codec/RawDanmuMessage.kt

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+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/8/30
+ */
+
+
+package cn.rtast.bldm.dm.codec
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+
+@Serializable
+public sealed class RawDanmuMessage {
+    @Serializable
+    @SerialName("STOP_LIVE_ROOM_LIST")
+    public data class RawStopLiveRoomListMsg(val data: Data) : RawDanmuMessage() {
+        @Serializable
+        public data class Data(
+            @SerialName("room_id_list")
+            val roomIdList: List<Long>,
+        )
+    }
+
+    @Serializable
+    @SerialName("INTERACT_WORD_V2")
+    public data class RawInteractWordV2(val data: Data) : RawDanmuMessage() {
+        @Serializable
+        public data class Data(
+            @SerialName("dmscore")
+            val dmScore: Int,
+            /**
+             * base64 encoded protobuf content
+             */
+            val pb: String,
+        )
+    }
+
+    @Serializable
+    @SerialName("LIKE_INFO_V3_CLICK")
+    public data class RawLikeInfoV3ClickMsg(val data: Data) : RawDanmuMessage() {
+
+        @Serializable
+        public data class Data(
+            @SerialName("contribution_info")
+            val contributionInfo: ContributionInfo,
+            val dmscore: Int,
+            @SerialName("fans_medal")
+            val fansMedal: FansMedal,
+            @SerialName("group_medal")
+            val groupMedal: String?,
+            val identities: List<Int>,
+            @SerialName("is_mystery")
+            val isMystery: Boolean,
+            @SerialName("like_icon")
+            val likeIcon: String,
+            @SerialName("like_text")
+            val likeText: String,
+            @SerialName("msg_type")
+            val msgType: Int,
+            @SerialName("show_area")
+            val showArea: Int,
+            val uid: Long,
+            val uinfo: UInfo,
+            val uname: String,
+            @SerialName("uname_color")
+            val unameColor: String,
+        )
+
+        @Serializable
+        public data class ContributionInfo(
+            val grade: Int,
+        )
+
+        @Serializable
+        public data class FansMedal(
+            @SerialName("anchor_roomid")
+            val anchorRoomid: Long,
+            @SerialName("guard_level")
+            val guardLevel: Int,
+            @SerialName("icon_id")
+            val iconId: Int,
+            @SerialName("is_lighted")
+            val isLighted: Int,
+            @SerialName("medal_color")
+            val medalColor: Long,
+            @SerialName("medal_color_border")
+            val medalColorBorder: Long,
+            @SerialName("medal_color_end")
+            val medalColorEnd: Long,
+            @SerialName("medal_color_start")
+            val medalColorStart: Long,
+            @SerialName("medal_level")
+            val medalLevel: Int,
+            @SerialName("medal_name")
+            val medalName: String,
+            val score: Long,
+            val special: String,
+            @SerialName("target_id")
+            val targetId: Long,
+        )
+
+        @Serializable
+        public data class UInfo(
+            val anon: String?,
+            val base: BaseInfo?,
+            val guard: String?,
+            @SerialName("guard_leader")
+            val guardLeader: String?,
+            val medal: String?,
+            val title: String?,
+            @SerialName("uhead_frame")
+            val uheadFrame: String?,
+            val uid: Long,
+            val wealth: String?,
+        )
+
+        @Serializable
+        public data class BaseInfo(
+            val face: String,
+            @SerialName("is_mystery")
+            val isMystery: Boolean,
+            val name: String,
+            @SerialName("name_color")
+            val nameColor: Int,
+            @SerialName("name_color_str")
+            val nameColorStr: String,
+            @SerialName("official_info")
+            val officialInfo: OfficialInfo,
+            @SerialName("origin_info")
+            val originInfo: OriginInfo,
+            @SerialName("risk_ctrl_info")
+            val riskCtrlInfo: String?,
+        )
+
+        @Serializable
+        public data class OfficialInfo(
+            val desc: String,
+            val role: Int,
+            val title: String,
+            val type: Int,
+        )
+
+        @Serializable
+        public data class OriginInfo(
+            val face: String,
+            val name: String,
+        )
+    }
+
+    @Serializable
+    @SerialName("RECALL_DANMU_MSG")
+    public data class RawRecallDanmuMsg(
+        val data: Data,
+    ) : RawDanmuMessage() {
+        @Serializable
+        public data class Data(
+            @SerialName("recall_type")
+            val recallType: Int,
+            @SerialName("target_id")
+            val targetId: Long,
+            val uinfo: UInfo,
+        )
+
+        @Serializable
+        public data class UInfo(
+            val uid: Long,
+            val base: String?,
+            val medal: String?,
+            val wealth: String?,
+            val title: String?,
+            val guard: String?,
+            @SerialName("uhead_frame")
+            val uheadFrame: String?,
+            @SerialName("guard_leader")
+            val guardLeader: String?,
+            val anon: String?,
+            @SerialName("bubble_box")
+            val bubbleBox: String?,
+            @SerialName("dm_config")
+            val dmConfig: String?,
+            @SerialName("name_color")
+            val nameColor: String?,
+        )
+    }
+
+    @Serializable
+    @SerialName("ONLINE_RANK_COUNT")
+    public data class RawOnlineRankCount(
+        val data: Data,
+    ) : RawDanmuMessage() {
+        @Serializable
+        public data class Data(
+            val count: Int,
+            @SerialName("count_text")
+            val countText: String,
+            @SerialName("online_count")
+            val onlineCount: Int,
+            @SerialName("online_count_text")
+            val onlineCountText: String,
+        )
+    }
+
+    @Serializable
+    @SerialName("SEND_GIFT_V2")
+    public data class RawSendGiftV2(
+        val danmu: Danmu,
+        val data: Data,
+    ) : RawDanmuMessage() {
+        @Serializable
+        public data class Danmu(
+            /**
+             * live room area id
+             */
+            val area: Int,
+        )
+
+        @Serializable
+        public data class Data(
+            /**
+             * maybe means `高能积分`
+             * depends on gift values
+             */
+            @SerialName("dmscore")
+            val dmScore: Int,
+            /**
+             * base64 encoded protobuf content
+             */
+            val pb: String,
+        )
+    }
+
+    @Serializable
+    @SerialName("LIKE_INFO_V3_UPDATE")
+    public data class RawLikeInfoV3Update(val data: Data) : RawDanmuMessage() {
+        @Serializable
+        public data class Data(
+            /**
+             * total like count
+             */
+            @SerialName("click_count")
+            val clickCount: Int,
+        )
+    }
+
+    @Serializable
+    @SerialName("ONLINE_RANK_V3")
+    public data class RawOnlineRankV3(val data: Data) : RawDanmuMessage() {
+        @Serializable
+        public data class Data(
+            /**
+             * base64 encoded protobuf content
+             */
+            val pb: String,
+        )
+    }
+
+    @Serializable
+    @SerialName("WATCHED_CHANGE")
+    public data class RawWatchedChange(
+        val data: Data,
+    ) : RawDanmuMessage() {
+        @Serializable
+        public data class Data(
+            /**
+             * example `305251371`
+             */
+            val num: Long,
+            /**
+             * example `30525.1万`
+             */
+            @SerialName("text_small")
+            val textSmall: String,
+            /**
+             * example `30525.1万人看过`
+             */
+            @SerialName("text_large")
+            val textLarge: String,
+        )
+    }
+}

bl-dm-codec/src/commonMain/kotlin/cn/rtast/bldm/dm/codec/ReverseEnginedProtobuf.kt

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+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/8/30
+ */
+
+
+package cn.rtast.bldm.dm.codec
+
+/**
+ * mark a class or property as derived through protobuf reverse engineering
+ */
+@Target(AnnotationTarget.CLASS, AnnotationTarget.PROPERTY)
+@Retention(AnnotationRetention.BINARY)
+@RequiresOptIn(level = RequiresOptIn.Level.ERROR)
+public annotation class ReverseEnginedProtobuf

bl-dm-codec/src/commonMain/kotlin/cn/rtast/bldm/dm/codec/SendGiftV2.kt

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+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/8/30
+ */
+
+
+package cn.rtast.bldm.dm.codec
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+public data class SendGiftV2(
+    override val origin: String,
+    @ReverseEnginedProtobuf override val reversed: ReversedProtobuf,
+    val area: Int,
+    val dmScore: Int,
+) : _ReversedProtobufClass<SendGiftV2.ReversedProtobuf> {
+    @Serializable
+    public data class ReversedProtobuf(
+        val comboId: Long,
+        val senderNameBytes: Map<String, Int>,
+        val senderFace: String,
+        val giftDetail: GiftDetail,
+        val status: Int,
+        val senderInfo: SenderInfo,
+    )
+
+    @Serializable
+    public data class GiftDetail(
+        val giftId: Int,
+        val giftNameBytes: Map<String, Int>,
+        val price: Int,
+        val coinType: String,
+        val timestamp: Long,
+        val comboCount: Int,
+        val batchComboId: String,
+        val batchNum: Int,
+        val totalCoin: Int,
+        val actionBytes: Map<String, Int>,
+        val anchorInfo: AnchorInfo,
+        val giftAssets: GiftAssets,
+    )
+
+    @Serializable
+    public data class AnchorInfo(
+        val anchorUid: Long,
+    )
+
+    @Serializable
+    public data class GiftAssets(
+        val icon: String,
+        val webp: String,
+        val gif: String,
+    )
+
+    @Serializable
+    public data class SenderInfo(
+        val comboId: Long,
+    )
+}

bl-dm-codec/src/commonMain/kotlin/cn/rtast/bldm/dm/codec/WatchedChange.kt

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+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/8/30
+ */
+
+
+package cn.rtast.bldm.dm.codec
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+public data class WatchedChange(
+    /**
+     * number of watched
+     */
+    val num: Long,
+    /**
+     * short formatted number
+     */
+    @SerialName("text_small")
+    val textSmall: String,
+    /**
+     * long formatted number
+     */
+    @SerialName("text_large")
+    val textLarge: String,
+)

bl-dm-codec/src/commonMain/kotlin/cn/rtast/bldm/dm/codec/_ReversedProtobufClass.kt

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+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/8/30
+ */
+
+package cn.rtast.bldm.dm.codec
+
+@Suppress("ClassName")
+public interface _ReversedProtobufClass<T> {
+    public val origin: String
+    public val reversed: T
+}

bl-dm-codec/src/commonMain/kotlin/cn/rtast/bldm/dm/codec/util/_base64.kt

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+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/8/30
+ */
+
+
+package cn.rtast.bldm.dm.codec.util
+
+import kotlin.io.encoding.Base64
+
+internal fun String.decodeBase64ToByteArray(): ByteArray = Base64.decode(this.encodeToByteArray())
+internal fun String.decodeBase64ToString(): String = Base64.decode(this.encodeToByteArray()).decodeToString()

bl-dm-codec/src/commonMain/kotlin/cn/rtast/bldm/dm/codec/util/_protobuf.kt

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+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/8/30
+ */
+
+
+@file:OptIn(ExperimentalSerializationApi::class)
+
+package cn.rtast.bldm.dm.codec.util
+
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.decodeFromByteArray
+import kotlinx.serialization.protobuf.ProtoBuf
+
+internal inline fun <reified T> ByteArray.fromProtobuf(): T =
+    ProtoBuf.decodeFromByteArray(this)