Change sendMessage to extension

gradle.properties

 # style guide
 kotlin.code.style=official
 # config
-mirai_version=0.6.1
+mirai_version=0.7.0
 kotlin.incremental.multiplatform=true
 kotlin.parallel.tasks.in.project=true
 # kotlin

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

@@ -7,10 +7,7 @@ import net.mamoe.mirai.Bot
 import net.mamoe.mirai.contact.*
 import net.mamoe.mirai.contact.data.Profile
 import net.mamoe.mirai.event.subscribeAlways
-import net.mamoe.mirai.message.Message
 import net.mamoe.mirai.message.MessageChain
-import net.mamoe.mirai.message.chain
-import net.mamoe.mirai.message.singleChain
 import net.mamoe.mirai.network.protocol.tim.packet.action.*
 import net.mamoe.mirai.network.protocol.tim.packet.event.MemberJoinEventPacket
 import net.mamoe.mirai.network.protocol.tim.packet.event.MemberQuitEvent
@@ -26,11 +23,6 @@ import kotlin.coroutines.CoroutineContext
 internal sealed class ContactImpl : Contact {
     abstract override suspend fun sendMessage(message: MessageChain)
 
-    //这两个方法应写为扩展函数, 但为方便 import 还是写在这里
-    override suspend fun sendMessage(plain: String) = sendMessage(plain.singleChain())
-
-    override suspend fun sendMessage(message: Message) = sendMessage(message.chain())
-
     /**
      * 开始监听事件, 以同步更新资料
      */

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/network/protocol/tim/packet/action/AddContact.kt

@@ -9,6 +9,7 @@ import net.mamoe.mirai.network.protocol.tim.TIMProtocol
 import net.mamoe.mirai.network.protocol.tim.packet.*
 import net.mamoe.mirai.network.protocol.tim.packet.event.EventPacket
 import net.mamoe.mirai.utils.io.*
+import net.mamoe.mirai.withSession
 
 
 /**
@@ -87,7 +88,8 @@ object CanAddFriendPacket : SessionPacketFactory<CanAddFriendResponse>() {
         writeQQ(qq)
     }
 
-    override suspend fun ByteReadPacket.decode(id: PacketId, sequenceId: UShort, handler: BotNetworkHandler<*>): CanAddFriendResponse = with(handler.bot) {
+    override suspend fun ByteReadPacket.decode(id: PacketId, sequenceId: UShort, handler: BotNetworkHandler<*>): CanAddFriendResponse =
+        handler.bot.withSession {
             if (remaining > 20) {//todo check
                 return CanAddFriendResponse.AlreadyAdded(readUInt().qq())
             }