senderId, sourceMessage, groupId are now accessible from MessageSource

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/message/MessageQQA.kt

@@ -274,12 +274,30 @@ internal class NotOnlineImageFromServer(
 
 @UseExperimental(ExperimentalUnsignedTypes::class, MiraiInternalAPI::class)
 internal fun MsgComm.Msg.toMessageChain(): MessageChain {
-    val elems = this.msgBody.richText.elems
+    val elements = this.msgBody.richText.elems
 
-    val message = MessageChain(initialCapacity = elems.size + 1)
+    val message = MessageChain(initialCapacity = elements.size + 1)
     message.add(MessageSourceFromMsg(delegate = this))
+    elements.joinToMessageChain(message)
+    return message
+}
 
-    elems.forEach {
+// These two functions are not the same.
+
+@UseExperimental(ExperimentalUnsignedTypes::class, MiraiInternalAPI::class)
+internal fun ImMsgBody.SourceMsg.toMessageChain(): MessageChain {
+    val elements = this.elems!!
+
+    val message = MessageChain(initialCapacity = elements.size + 1)
+    message.add(MessageSourceFromServer(delegate = this))
+    elements.joinToMessageChain(message)
+    return message
+}
+
+
+@UseExperimental(MiraiInternalAPI::class)
+internal fun List<ImMsgBody.Elem>.joinToMessageChain(message: MessageChain) {
+    this.forEach {
         when {
             it.srcMsg != null -> message.add(QuoteReply(MessageSourceFromServer(it.srcMsg)))
             it.notOnlineImage != null -> message.add(NotOnlineImageFromServer(it.notOnlineImage))
@@ -296,5 +314,4 @@ internal fun MsgComm.Msg.toMessageChain(): MessageChain {
         }
     }
 
-    return message
 }

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/message/MessageSourceFromMsg.kt

@@ -10,6 +10,7 @@
 package net.mamoe.mirai.qqandroid.message
 
 import net.mamoe.mirai.contact.Group
+import net.mamoe.mirai.message.data.MessageChain
 import net.mamoe.mirai.message.data.MessageSource
 import net.mamoe.mirai.qqandroid.io.serialization.loadAs
 import net.mamoe.mirai.qqandroid.io.serialization.toByteArray
@@ -20,8 +21,10 @@ import net.mamoe.mirai.qqandroid.network.protocol.data.proto.SourceMsg
 internal inline class MessageSourceFromServer(
     val delegate: ImMsgBody.SourceMsg
 ) : MessageSource {
-    override val messageUid: Long
-        get() = delegate.pbReserve.loadAs(SourceMsg.ResvAttr.serializer()).origUids!!
+    override val messageUid: Long get() = delegate.pbReserve.loadAs(SourceMsg.ResvAttr.serializer()).origUids!!
+    override val sourceMessage: MessageChain get() = delegate.toMessageChain()
+    override val senderId: Long get() = delegate.senderUin
+    override val groupId: Long get() = Group.calculateGroupCodeByGroupUin(delegate.toUin)
 
     override fun toString(): String = ""
 }
@@ -29,12 +32,14 @@ internal inline class MessageSourceFromServer(
 internal inline class MessageSourceFromMsg(
     val delegate: MsgComm.Msg
 ) : MessageSource {
-    override val messageUid: Long
-        get() = delegate.msgBody.richText.attr!!.random.toLong()
+    override val messageUid: Long get() = delegate.msgBody.richText.attr!!.random.toLong()
+    override val sourceMessage: MessageChain get() = delegate.toMessageChain()
+    override val senderId: Long get() = delegate.msgHead.fromUin
+    override val groupId: Long get() = delegate.msgHead.groupInfo!!.groupCode
 
     fun toJceData(): ImMsgBody.SourceMsg {
 
-        val groupUin = Group.calculateGroupIdByGroupCode(delegate.msgHead.groupInfo!!.groupCode)
+        val groupUin = Group.calculateGroupUinByGroupCode(delegate.msgHead.groupInfo!!.groupCode)
 
         return ImMsgBody.SourceMsg(
             origSeqs = listOf(delegate.msgHead.msgSeq),

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/contact/Group.kt

@@ -111,21 +111,37 @@ interface Group : Contact, CoroutineScope {
         /**
          * by @kar98k
          */
-        fun calculateGroupIdByGroupCode(groupCode: Long): Long {
+        fun calculateGroupUinByGroupCode(groupCode: Long): Long {
             var left: Long = groupCode / 1000000L
 
-            when {
-                left <= 10 -> left += 202
-                left <= 19 -> left += 480 - 11
-                left <= 66 -> left += 2100 - 20
-                left <= 156 -> left += 2010 - 67
-                left <= 209 -> left += 2147 - 157
-                left <= 309 -> left += 4100 - 210
-                left <= 499 -> left += 3800 - 310
+            when (left) {
+                in 0..10 -> left += 202
+                in 11..19 -> left += 480 - 11
+                in 20..66 -> left += 2100 - 20
+                in 67..156 -> left += 2010 - 67
+                in 157..209 -> left += 2147 - 157
+                in 210..309 -> left += 4100 - 210
+                in 310..499 -> left += 3800 - 310
             }
 
             return left * 1000000L + groupCode % 1000000L
         }
+
+        fun calculateGroupCodeByGroupUin(groupUin: Long): Long {
+            var left: Long = groupUin / 1000000L
+
+            when (left) {
+                in 0 + 202..10 + 202 -> left -= 202
+                in 11 + 480 - 11..19 + 480 - 11 -> left -= 480 - 11
+                in 20 + 2100 - 20..66 + 2100 - 20 -> left -= 2100 - 20
+                in 67 + 2010 - 67..156 + 2010 - 67 -> left -= 2010 - 67
+                in 157 + 2147 - 157..209 + 2147 - 157 -> left -= 2147 - 157
+                in 210 + 4100 - 210..309 + 4100 - 210 -> left -= 4100 - 210
+                in 310 + 3800 - 310..499 + 3800 - 310 -> left -= 3800 - 310
+            }
+
+            return left * 1000000L + groupUin % 1000000L
+        }
     }
 
     @MiraiExperimentalAPI

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/MessageSource.kt

@@ -23,6 +23,21 @@ interface MessageSource : Message {
      */
     val messageUid: Long
 
+    /**
+     * 发送人号码
+     */
+    val senderId: Long
+
+    /**
+     * 群号码
+     */
+    val groupId: Long
+
+    /**
+     * 原消息内容
+     */
+    val sourceMessage: MessageChain
+
     /**
      * 固定返回空字符串 ("")
      */