Change sendMessage(MessageChain) to sendMessage(Message)

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

@@ -9,19 +9,9 @@
 
 package net.mamoe.mirai.qqandroid
 
-import io.ktor.client.HttpClient
-import io.ktor.client.request.*
-import io.ktor.client.request.forms.MultiPartFormDataContent
-import io.ktor.client.request.forms.formData
-import kotlinx.coroutines.async
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withTimeoutOrNull
 import kotlinx.io.core.Closeable
-import kotlinx.serialization.MissingFieldException
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
-import kotlinx.serialization.json.int
-import kotlinx.serialization.json.long
 import net.mamoe.mirai.LowLevelAPI
 import net.mamoe.mirai.contact.*
 import net.mamoe.mirai.data.*
@@ -30,10 +20,7 @@ import net.mamoe.mirai.event.events.*
 import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
 import net.mamoe.mirai.message.MessageReceipt
-import net.mamoe.mirai.message.data.MessageChain
-import net.mamoe.mirai.message.data.MessageSource
-import net.mamoe.mirai.message.data.OfflineFriendImage
-import net.mamoe.mirai.message.data.OfflineGroupImage
+import net.mamoe.mirai.message.data.*
 import net.mamoe.mirai.qqandroid.message.MessageSourceFromSendGroup
 import net.mamoe.mirai.qqandroid.network.highway.HighwayHelper
 import net.mamoe.mirai.qqandroid.network.highway.postImage
@@ -45,7 +32,6 @@ import net.mamoe.mirai.qqandroid.network.protocol.packet.chat.image.LongConn
 import net.mamoe.mirai.qqandroid.network.protocol.packet.chat.receive.MessageSvc
 import net.mamoe.mirai.qqandroid.utils.toIpV4AddressString
 import net.mamoe.mirai.utils.*
-import net.mamoe.mirai.utils.io.encodeToString
 import net.mamoe.mirai.utils.io.toUHexString
 import kotlin.contracts.ExperimentalContracts
 import kotlin.contracts.contract
@@ -69,8 +55,9 @@ internal class QQImpl(
     override val nick: String
         get() = friendInfo.nick
 
-    override suspend fun sendMessage(message: MessageChain): MessageReceipt<QQ> {
-        val event = FriendMessageSendEvent(this, message).broadcast()
+    @Suppress("DuplicatedCode")
+    override suspend fun sendMessage(message: Message): MessageReceipt<QQ> {
+        val event = FriendMessageSendEvent(this, message.asMessageChain()).broadcast()
         if (event.isCancelled) {
             throw EventCancelledException("cancelled by FriendMessageSendEvent")
         }
@@ -89,6 +76,11 @@ internal class QQImpl(
         return MessageReceipt(source, this, null)
     }
 
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
+    override suspend fun sendMessage(message: MessageChain): MessageReceipt<QQ> {
+        return this.sendMessage(message as Message)
+    }
+
     @OptIn(MiraiInternalAPI::class)
     override suspend fun uploadImage(image: ExternalImage): OfflineFriendImage = try {
         if (BeforeImageUploadEvent(this, image).broadcast().isCancelled) {
@@ -220,7 +212,32 @@ internal class MemberImpl(
     @MiraiExperimentalAPI
     override suspend fun queryRemark(): FriendNameRemark = qq.queryRemark()
 
-    override suspend fun sendMessage(message: MessageChain): MessageReceipt<QQ> = qq.sendMessage(message)
+    @Suppress("DuplicatedCode")
+    override suspend fun sendMessage(message: Message): MessageReceipt<Member> {
+        val event = FriendMessageSendEvent(this, message.asMessageChain()).broadcast()
+        if (event.isCancelled) {
+            throw EventCancelledException("cancelled by FriendMessageSendEvent")
+        }
+        lateinit var source: MessageSource
+        bot.network.run {
+            check(
+                MessageSvc.PbSendMsg.ToFriend(
+                    bot.client,
+                    id,
+                    event.message
+                ) {
+                    source = it
+                }.sendAndExpect<MessageSvc.PbSendMsg.Response>() is MessageSvc.PbSendMsg.Response.SUCCESS
+            ) { "send message failed" }
+        }
+        return MessageReceipt(source, this, null)
+    }
+
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
+    override suspend fun sendMessage(message: MessageChain): MessageReceipt<out QQ> {
+        return this.sendMessage(message as Message)
+    }
+
     override suspend fun uploadImage(image: ExternalImage): OfflineFriendImage = qq.uploadImage(image)
     // endregion
 
@@ -386,10 +403,7 @@ internal class GroupImpl(
     groupInfo: GroupInfo,
     members: Sequence<MemberInfo>
 ) : Group() {
-    @Suppress("\"RemoveEmptyClassBody\"") // things will go wrong after removal, don't try
-    companion object {
-
-    }
+    companion object;
 
     override val bot: QQAndroidBot by bot.unsafeWeakRef()
     val uin: Long = groupInfo.uin
@@ -595,9 +609,9 @@ internal class GroupImpl(
         return members.delegate.filteringGetOrNull { it.id == id }
     }
 
-    override suspend fun sendMessage(message: MessageChain): MessageReceipt<Group> {
+    override suspend fun sendMessage(message: Message): MessageReceipt<Group> {
         check(!isBotMuted) { "bot is muted. Remaining seconds=$botMuteRemaining" }
-        val event = GroupMessageSendEvent(this, message).broadcast()
+        val event = GroupMessageSendEvent(this, message.asMessageChain()).broadcast()
         if (event.isCancelled) {
             throw EventCancelledException("cancelled by FriendMessageSendEvent")
         }
@@ -619,6 +633,12 @@ internal class GroupImpl(
         return MessageReceipt(source, this, botAsMember)
     }
 
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
+    override suspend fun sendMessage(message: MessageChain): MessageReceipt<Group> {
+        return this.sendMessage(message as Message)
+    }
+
+
     override suspend fun uploadImage(image: ExternalImage): OfflineGroupImage = try {
         if (BeforeImageUploadEvent(this, image).broadcast().isCancelled) {
             throw EventCancelledException("cancelled by BeforeImageUploadEvent.ToGroup")

mirai-core/src/androidMain/kotlin/net/mamoe/mirai/contact/Contact.kt

@@ -18,6 +18,7 @@ import net.mamoe.mirai.event.events.ImageUploadEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
 import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.message.data.MessageChain
 import net.mamoe.mirai.message.data.OfflineImage
 import net.mamoe.mirai.message.data.id
@@ -64,6 +65,10 @@ actual abstract class Contact : CoroutineScope, ContactJavaHappyAPI() {
      */
     @JvmName("sendMessageSuspend")
     @JvmSynthetic
+    actual abstract suspend fun sendMessage(message: Message): MessageReceipt<out Contact>
+
+    @JvmSynthetic
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
     actual abstract suspend fun sendMessage(message: MessageChain): MessageReceipt<out Contact>
 
     /**

mirai-core/src/androidMain/kotlin/net/mamoe/mirai/contact/ContactJavaHappyAPI.kt

@@ -58,12 +58,14 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(EventCancelledException::class, IllegalStateException::class)
     @JvmName("sendMessage")
-    open fun __sendMessageBlockingForJava__(message: Message): MessageReceipt<Contact> {
-        return runBlocking { sendMessage(message) }
+    open fun __sendMessageBlockingForJava__(message: Message): MessageReceipt<out Contact> {
+        return runBlocking {
+            sendMessage(message)
+        }
     }
 
     @JvmName("sendMessage")
-    open fun __sendMessageBlockingForJava__(message: String): MessageReceipt<Contact> {
+    open fun __sendMessageBlockingForJava__(message: String): MessageReceipt<out Contact> {
         return runBlocking { sendMessage(message) }
     }
 
@@ -137,7 +139,7 @@ actual abstract class ContactJavaHappyAPI {
      * @see Contact.sendMessage
      */
     @JvmName("sendMessageAsync")
-    open fun __sendMessageAsyncForJava__(message: Message): Future<MessageReceipt<Contact>> {
+    open fun __sendMessageAsyncForJava__(message: Message): Future<MessageReceipt<out Contact>> {
         return future { sendMessage(message) }
     }
 
@@ -146,7 +148,7 @@ actual abstract class ContactJavaHappyAPI {
      * @see Contact.sendMessage
      */
     @JvmName("sendMessageAsync")
-    open fun __sendMessageAsyncForJava__(message: String): Future<MessageReceipt<Contact>> {
+    open fun __sendMessageAsyncForJava__(message: String): Future<MessageReceipt<out Contact>> {
         return future { sendMessage(message) }
     }
 

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

@@ -16,6 +16,7 @@ import net.mamoe.mirai.event.events.*
 import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
 import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.message.data.MessageChain
 import net.mamoe.mirai.message.data.OfflineGroupImage
 import net.mamoe.mirai.utils.ExternalImage
@@ -179,6 +180,10 @@ actual abstract class Group : Contact(), CoroutineScope {
      */
     @JvmName("sendMessageSuspend")
     @JvmSynthetic
+    actual abstract override suspend fun sendMessage(message: Message): MessageReceipt<Group>
+
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
+    @JvmSynthetic
     actual abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<Group>
 
     /**

mirai-core/src/androidMain/kotlin/net/mamoe/mirai/contact/Member.kt

@@ -14,6 +14,10 @@ package net.mamoe.mirai.contact
 import net.mamoe.mirai.Bot
 import net.mamoe.mirai.JavaHappyAPI
 import net.mamoe.mirai.event.events.*
+import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
+import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
+import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.utils.MiraiInternalAPI
 import net.mamoe.mirai.utils.WeakRefProperty
 
@@ -101,6 +105,21 @@ actual abstract class Member : MemberJavaHappyAPI() {
     @JvmSynthetic
     actual abstract suspend fun unmute()
 
+    /**
+     * 向这个对象发送消息.
+     *
+     * @see FriendMessageSendEvent 发送好友信息事件, cancellable
+     * @see GroupMessageSendEvent  发送群消息事件. cancellable
+     *
+     * @throws EventCancelledException 当发送消息事件被取消
+     * @throws IllegalStateException 发送群消息时若 [Bot] 被禁言抛出
+     *
+     * @return 消息回执. 可进行撤回 ([MessageReceipt.recall])
+     */
+    @JvmName("sendMessageSuspend")
+    @JvmSynthetic
+    actual abstract override suspend fun sendMessage(message: Message): MessageReceipt<Member>
+
     /**
      * 踢出该成员.
      *

mirai-core/src/androidMain/kotlin/net/mamoe/mirai/contact/QQ.kt

@@ -13,6 +13,7 @@ import net.mamoe.mirai.event.events.ImageUploadEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
 import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.message.data.MessageChain
 import net.mamoe.mirai.message.data.OfflineFriendImage
 import net.mamoe.mirai.utils.ExternalImage
@@ -88,7 +89,11 @@ actual abstract class QQ : Contact(), CoroutineScope {
      */
     @JvmName("sendMessageSuspend")
     @JvmSynthetic
-    actual abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<QQ>
+    actual abstract override suspend fun sendMessage(message: Message): MessageReceipt<out QQ>
+
+    @JvmSynthetic
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
+    actual abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<out QQ>
 
     /**
      * 上传一个图片以备发送.

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/Bot.kt

@@ -266,7 +266,7 @@ suspend inline fun Bot.recall(message: MessageChain) = this.recall(message[Messa
  * @param coroutineContext 额外的 [CoroutineContext]
  * @see recall
  */
-fun Bot.recallIn(
+inline fun Bot.recallIn(
     source: MessageSource,
     millis: Long,
     coroutineContext: CoroutineContext = EmptyCoroutineContext
@@ -282,7 +282,7 @@ fun Bot.recallIn(
  * @param coroutineContext 额外的 [CoroutineContext]
  * @see recall
  */
-fun Bot.recallIn(
+inline fun Bot.recallIn(
     message: MessageChain,
     millis: Long,
     coroutineContext: CoroutineContext = EmptyCoroutineContext

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

@@ -7,7 +7,7 @@
  * https://github.com/mamoe/mirai/blob/master/LICENSE
  */
 
-@file:Suppress("EXPERIMENTAL_API_USAGE")
+@file:Suppress("EXPERIMENTAL_API_USAGE", "NOTHING_TO_INLINE")
 
 package net.mamoe.mirai.contact
 
@@ -69,6 +69,10 @@ expect abstract class Contact() : CoroutineScope, ContactJavaHappyAPI {
      */
     @JvmName("sendMessageSuspend")
     @JvmSynthetic
+    abstract suspend fun sendMessage(message: Message): MessageReceipt<out Contact>
+
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
+    @JvmSynthetic
     abstract suspend fun sendMessage(message: MessageChain): MessageReceipt<out Contact>
 
     /**
@@ -120,7 +124,7 @@ suspend inline fun Contact.recall(source: MessageSource) = this.bot.recall(sourc
  * @see Bot.recallIn
  */
 @MiraiExperimentalAPI
-fun Contact.recallIn(
+inline fun Contact.recallIn(
     message: MessageChain,
     millis: Long,
     coroutineContext: CoroutineContext = EmptyCoroutineContext
@@ -129,7 +133,7 @@ fun Contact.recallIn(
 /**
  * @see Bot.recallIn
  */
-fun Contact.recallIn(
+inline fun Contact.recallIn(
     source: MessageSource,
     millis: Long,
     coroutineContext: CoroutineContext = EmptyCoroutineContext
@@ -139,11 +143,5 @@ fun Contact.recallIn(
  * @see Contact.sendMessage
  */
 @Suppress("UNCHECKED_CAST")
-suspend inline fun <C : Contact> C.sendMessage(message: Message): MessageReceipt<C> =
-    sendMessage(message.asMessageChain()) as? MessageReceipt<C> ?: error("Internal class cast mistake")
-
-/**
- * @see Contact.sendMessage
- */
-@Suppress("UNCHECKED_CAST")
-suspend inline fun <C : Contact> C.sendMessage(plain: String): MessageReceipt<C> = sendMessage(plain.toMessage())
+suspend inline fun <C : Contact> C.sendMessage(plain: String): MessageReceipt<C> =
+    sendMessage(plain.toMessage()) as? MessageReceipt<C> ?: error("Internal class cast mistake")

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

@@ -12,17 +12,13 @@
 package net.mamoe.mirai.contact
 
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.serialization.SerialInfo
-import kotlinx.serialization.SerialName
-import kotlinx.serialization.Serializable
 import net.mamoe.mirai.Bot
-import net.mamoe.mirai.data.GroupAnnouncement
-import net.mamoe.mirai.data.GroupAnnouncementList
 import net.mamoe.mirai.data.MemberInfo
 import net.mamoe.mirai.event.events.*
 import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
 import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.message.data.MessageChain
 import net.mamoe.mirai.message.data.OfflineGroupImage
 import net.mamoe.mirai.utils.ExternalImage
@@ -185,6 +181,10 @@ expect abstract class Group() : Contact, CoroutineScope {
      */
     @JvmName("sendMessageSuspend")
     @JvmSynthetic
+    abstract override suspend fun sendMessage(message: Message): MessageReceipt<Group>
+
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
+    @JvmSynthetic
     abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<Group>
 
     /**

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

@@ -14,6 +14,8 @@ package net.mamoe.mirai.contact
 import net.mamoe.mirai.Bot
 import net.mamoe.mirai.JavaHappyAPI
 import net.mamoe.mirai.event.events.*
+import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.utils.MiraiInternalAPI
 import net.mamoe.mirai.utils.WeakRefProperty
 import kotlin.jvm.JvmName
@@ -130,6 +132,21 @@ expect abstract class Member() : MemberJavaHappyAPI {
      * @return `bot.hashCode() * 31 + id.hashCode()`
      */
     abstract override fun hashCode(): Int
+
+    /**
+     * 向这个对象发送消息.
+     *
+     * @see MessageSendEvent.FriendMessageSendEvent 发送好友信息事件, cancellable
+     * @see MessageSendEvent.GroupMessageSendEvent  发送群消息事件. cancellable
+     *
+     * @throws EventCancelledException 当发送消息事件被取消
+     * @throws IllegalStateException 发送群消息时若 [Bot] 被禁言抛出
+     *
+     * @return 消息回执. 可进行撤回 ([MessageReceipt.recall])
+     */
+    @JvmSynthetic
+    @JvmName("sendMessageSuspend")
+    abstract override suspend fun sendMessage(message: Message): MessageReceipt<Member>
 }
 
 /**

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

@@ -7,6 +7,8 @@
  * https://github.com/mamoe/mirai/blob/master/LICENSE
  */
 
+@file:Suppress("NOTHING_TO_INLINE")
+
 package net.mamoe.mirai.contact
 
 import net.mamoe.mirai.Bot
@@ -34,38 +36,32 @@ enum class MemberPermission {
 /**
  * 是群主
  */
-@Suppress("NOTHING_TO_INLINE")
 inline fun MemberPermission.isOwner(): Boolean = this == MemberPermission.OWNER
 
 /**
  * 是管理员
  */
-@Suppress("NOTHING_TO_INLINE")
 inline fun MemberPermission.isAdministrator(): Boolean = this == MemberPermission.ADMINISTRATOR
 
 /**
  * 是管理员或群主
  */
-@Suppress("NOTHING_TO_INLINE")
 inline fun MemberPermission.isOperator(): Boolean = isAdministrator() || isOwner()
 
 
 /**
  * 是群主
  */
-@Suppress("NOTHING_TO_INLINE")
 inline fun Member.isOwner(): Boolean = this.permission.isOwner()
 
 /**
  * 是管理员
  */
-@Suppress("NOTHING_TO_INLINE")
 inline fun Member.isAdministrator(): Boolean = this.permission.isAdministrator()
 
 /**
  * 是管理员或群主
  */
-@Suppress("NOTHING_TO_INLINE")
 inline fun Member.isOperator(): Boolean = this.permission.isOperator()
 
 

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

@@ -22,6 +22,7 @@ import net.mamoe.mirai.event.events.ImageUploadEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
 import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.message.data.MessageChain
 import net.mamoe.mirai.message.data.OfflineFriendImage
 import net.mamoe.mirai.utils.ExternalImage
@@ -98,7 +99,11 @@ expect abstract class QQ() : Contact, CoroutineScope {
      */
     @JvmSynthetic
     @JvmName("sendMessageSuspend")
-    abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<QQ>
+    abstract override suspend fun sendMessage(message: Message): MessageReceipt<out QQ>
+
+    @JvmSynthetic
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
+    abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<out QQ>
 
     /**
      * 上传一个图片以备发送.

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

@@ -84,9 +84,6 @@ abstract class MessagePacketBase<TSender : QQ, TSubject : Contact> : Packet, Bot
      * 对于好友消息事件, 这个方法将会给好友 ([subject]) 发送消息
      * 对于群消息事件, 这个方法将会给群 ([subject]) 发送消息
      */
-    suspend inline fun reply(message: MessageChain): MessageReceipt<TSubject> =
-        subject.sendMessage(message) as MessageReceipt<TSubject>
-
     suspend inline fun reply(message: Message): MessageReceipt<TSubject> =
         subject.sendMessage(message.asMessageChain()) as MessageReceipt<TSubject>
 
@@ -98,9 +95,6 @@ abstract class MessagePacketBase<TSender : QQ, TSubject : Contact> : Packet, Bot
 
     @JvmName("reply1")
     suspend inline fun Message.reply(): MessageReceipt<TSubject> = reply(this)
-
-    @JvmName("reply1")
-    suspend inline fun MessageChain.reply(): MessageReceipt<TSubject> = reply(this)
     // endregion
 
     // region 撤回

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

@@ -12,7 +12,6 @@
 package net.mamoe.mirai.message.data
 
 import net.mamoe.mirai.contact.Contact
-import net.mamoe.mirai.contact.sendMessage
 import net.mamoe.mirai.message.MessageReceipt
 import kotlin.jvm.JvmSynthetic
 
@@ -109,8 +108,9 @@ interface Message {
     operator fun plus(another: CharSequence): CombinedMessage = this.followedBy(another.toString().toMessage())
 }
 
+@Suppress("UNCHECKED_CAST")
 suspend inline fun <C : Contact> Message.sendTo(contact: C): MessageReceipt<C> {
-    return contact.sendMessage(this)
+    return contact.sendMessage(this) as MessageReceipt<C>
 }
 
 fun Message.repeat(count: Int): MessageChain {

mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/contact/Contact.kt

@@ -18,6 +18,7 @@ import net.mamoe.mirai.event.events.ImageUploadEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
 import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.message.data.MessageChain
 import net.mamoe.mirai.message.data.OfflineImage
 import net.mamoe.mirai.message.data.id
@@ -63,6 +64,10 @@ actual abstract class Contact : CoroutineScope, ContactJavaHappyAPI() {
      */
     @JvmName("sendMessageSuspend")
     @JvmSynthetic
+    actual abstract suspend fun sendMessage(message: Message): MessageReceipt<out Contact>
+
+    @JvmSynthetic
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
     actual abstract suspend fun sendMessage(message: MessageChain): MessageReceipt<out Contact>
 
     /**

mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/contact/ContactJavaHappyAPI.kt

@@ -58,12 +58,12 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(EventCancelledException::class, IllegalStateException::class)
     @JvmName("sendMessage")
-    open fun __sendMessageBlockingForJava__(message: Message): MessageReceipt<Contact> {
+    open fun __sendMessageBlockingForJava__(message: Message): MessageReceipt<out Contact> {
         return runBlocking { sendMessage(message) }
     }
 
     @JvmName("sendMessage")
-    open fun __sendMessageBlockingForJava__(message: String): MessageReceipt<Contact> {
+    open fun __sendMessageBlockingForJava__(message: String): MessageReceipt<out Contact> {
         return runBlocking { sendMessage(message) }
     }
 
@@ -137,7 +137,7 @@ actual abstract class ContactJavaHappyAPI {
      * @see Contact.sendMessage
      */
     @JvmName("sendMessageAsync")
-    open fun __sendMessageAsyncForJava__(message: Message): Future<MessageReceipt<Contact>> {
+    open fun __sendMessageAsyncForJava__(message: Message): Future<MessageReceipt<out Contact>> {
         return future { sendMessage(message) }
     }
 
@@ -146,7 +146,7 @@ actual abstract class ContactJavaHappyAPI {
      * @see Contact.sendMessage
      */
     @JvmName("sendMessageAsync")
-    open fun __sendMessageAsyncForJava__(message: String): Future<MessageReceipt<Contact>> {
+    open fun __sendMessageAsyncForJava__(message: String): Future<MessageReceipt<out Contact>> {
         return future { sendMessage(message) }
     }
 
@@ -225,7 +225,7 @@ actual abstract class MemberJavaHappyAPI : QQ() {
      *
      * 管理员可禁言成员, 群主可禁言管理员和群员.
      *
-     * @param durationSeconds 持续时间. 精确到秒. 范围区间表示为 `(0s, 30days]`. 超过范围则会抛出异常.
+     * @param seconds 持续时间. 精确到秒. 范围区间表示为 `(0s, 30days]`. 超过范围则会抛出异常.
      * @return 机器人无权限时返回 `false`
      *
      * @see Int.minutesToSeconds
@@ -286,7 +286,7 @@ actual abstract class MemberJavaHappyAPI : QQ() {
      *
      * 管理员可禁言成员, 群主可禁言管理员和群员.
      *
-     * @param durationSeconds 持续时间. 精确到秒. 范围区间表示为 `(0s, 30days]`. 超过范围则会抛出异常.
+     * @param seconds 持续时间. 精确到秒. 范围区间表示为 `(0s, 30days]`. 超过范围则会抛出异常.
      * @return 机器人无权限时返回 `false`
      *
      * @see Int.minutesToSeconds

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

@@ -11,13 +11,12 @@ package net.mamoe.mirai.contact
 
 import kotlinx.coroutines.CoroutineScope
 import net.mamoe.mirai.Bot
-import net.mamoe.mirai.data.GroupAnnouncement
-import net.mamoe.mirai.data.GroupAnnouncementList
 import net.mamoe.mirai.data.MemberInfo
 import net.mamoe.mirai.event.events.*
 import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
 import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.message.data.MessageChain
 import net.mamoe.mirai.message.data.OfflineGroupImage
 import net.mamoe.mirai.utils.ExternalImage
@@ -182,6 +181,10 @@ actual abstract class Group : Contact(), CoroutineScope {
      */
     @JvmName("sendMessageSuspend")
     @JvmSynthetic
+    actual abstract override suspend fun sendMessage(message: Message): MessageReceipt<Group>
+
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
+    @JvmSynthetic
     actual abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<Group>
 
     /**

mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/contact/Member.kt

@@ -14,6 +14,10 @@ package net.mamoe.mirai.contact
 import net.mamoe.mirai.Bot
 import net.mamoe.mirai.JavaHappyAPI
 import net.mamoe.mirai.event.events.*
+import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
+import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
+import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.utils.MiraiInternalAPI
 import net.mamoe.mirai.utils.WeakRefProperty
 
@@ -113,6 +117,21 @@ actual abstract class Member : MemberJavaHappyAPI() {
     @JvmSynthetic
     actual abstract suspend fun kick(message: String)
 
+    /**
+     * 向这个对象发送消息.
+     *
+     * @see FriendMessageSendEvent 发送好友信息事件, cancellable
+     * @see GroupMessageSendEvent  发送群消息事件. cancellable
+     *
+     * @throws EventCancelledException 当发送消息事件被取消
+     * @throws IllegalStateException 发送群消息时若 [Bot] 被禁言抛出
+     *
+     * @return 消息回执. 可进行撤回 ([MessageReceipt.recall])
+     */
+    @JvmName("sendMessageSuspend")
+    @JvmSynthetic
+    actual abstract override suspend fun sendMessage(message: Message): MessageReceipt<Member>
+
     /**
      * 当且仅当 `[other] is [Member] && [other].id == this.id && [other].group == this.group` 时为 true
      */

mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/contact/QQ.kt

@@ -13,6 +13,7 @@ import net.mamoe.mirai.event.events.ImageUploadEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.FriendMessageSendEvent
 import net.mamoe.mirai.event.events.MessageSendEvent.GroupMessageSendEvent
 import net.mamoe.mirai.message.MessageReceipt
+import net.mamoe.mirai.message.data.Message
 import net.mamoe.mirai.message.data.MessageChain
 import net.mamoe.mirai.message.data.OfflineFriendImage
 import net.mamoe.mirai.utils.ExternalImage
@@ -88,7 +89,11 @@ actual abstract class QQ : Contact(), CoroutineScope {
      */
     @JvmName("sendMessageSuspend")
     @JvmSynthetic
-    actual abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<QQ>
+    actual abstract override suspend fun sendMessage(message: Message): MessageReceipt<out QQ>
+
+    @JvmSynthetic
+    @Deprecated("for binary compatibility", level = DeprecationLevel.HIDDEN)
+    actual abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<out QQ>
 
     /**
      * 上传一个图片以备发送.