Unified Image types: Online/Offline Image, Group/Friend Image

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

@@ -20,7 +20,10 @@ 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.*
+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.qqandroid.message.MessageSourceFromSendGroup
 import net.mamoe.mirai.qqandroid.network.highway.HighwayHelper
 import net.mamoe.mirai.qqandroid.network.highway.postImage
@@ -73,7 +76,7 @@ internal class QQImpl(
         return MessageReceipt(source, this, null)
     }
 
-    override suspend fun uploadImage(image: ExternalImage): Image = try {
+    override suspend fun uploadImage(image: ExternalImage): OfflineFriendImage = try {
         if (BeforeImageUploadEvent(this, image).broadcast().isCancelled) {
             throw EventCancelledException("cancelled by BeforeImageUploadEvent.ToGroup")
         }
@@ -93,8 +96,9 @@ internal class QQImpl(
                 )
             ).sendAndExpect<LongConn.OffPicUp.Response>()
 
+            @Suppress("UNCHECKED_CAST") // bug
             return when (response) {
-                is LongConn.OffPicUp.Response.FileExists -> NotOnlineImageFromFile(
+                is LongConn.OffPicUp.Response.FileExists -> OfflineFriendImage(
                     filepath = response.resourceId,
                     md5 = response.imageInfo.fileMd5,
                     fileLength = response.imageInfo.fileSize.toInt(),
@@ -125,7 +129,7 @@ internal class QQImpl(
                     //)
                     // 为什么不能 ??
 
-                    return NotOnlineImageFromFile(
+                    return OfflineFriendImage(
                         filepath = response.resourceId,
                         md5 = image.md5,
                         fileLength = image.inputSize.toInt(),
@@ -192,6 +196,7 @@ internal class MemberImpl(
     // region QQ delegate
     override val id: Long = qq.id
     override val nick: String = qq.nick
+
     @MiraiExperimentalAPI
     override suspend fun queryProfile(): Profile = qq.queryProfile()
 
@@ -202,12 +207,14 @@ internal class MemberImpl(
     override suspend fun queryRemark(): FriendNameRemark = qq.queryRemark()
 
     override suspend fun sendMessage(message: MessageChain): MessageReceipt<QQ> = qq.sendMessage(message)
-    override suspend fun uploadImage(image: ExternalImage): Image = qq.uploadImage(image)
+    override suspend fun uploadImage(image: ExternalImage): OfflineFriendImage = qq.uploadImage(image)
     // endregion
 
     override var permission: MemberPermission = memberInfo.permission
+
     @Suppress("PropertyName")
     internal var _nameCard: String = memberInfo.nameCard
+
     @Suppress("PropertyName")
     internal var _specialTitle: String = memberInfo.specialTitle
 
@@ -589,7 +596,7 @@ internal class GroupImpl(
         return MessageReceipt(source, this, botAsMember)
     }
 
-    override suspend fun uploadImage(image: ExternalImage): Image = try {
+    override suspend fun uploadImage(image: ExternalImage): OfflineGroupImage = try {
         if (BeforeImageUploadEvent(this, image).broadcast().isCancelled) {
             throw EventCancelledException("cancelled by BeforeImageUploadEvent.ToGroup")
         }
@@ -606,6 +613,7 @@ internal class GroupImpl(
                 filename = image.filename
             ).sendAndExpect()
 
+            @Suppress("UNCHECKED_CAST") // bug
             when (response) {
                 is ImgStore.GroupPicUp.Response.Failed -> {
                     ImageUploadEvent.Failed(this@GroupImpl, image, response.resultCode, response.message).broadcast()
@@ -625,7 +633,7 @@ internal class GroupImpl(
 //                        fileId = response.fileId.toInt()
 //                    )
                     //  println("NMSL")
-                    return CustomFaceFromFile(
+                    return OfflineGroupImage(
                         md5 = image.md5,
                         filepath = resourceId
                     ).also { ImageUploadEvent.Succeed(this@GroupImpl, image, it).broadcast() }
@@ -655,7 +663,7 @@ internal class GroupImpl(
                     //     imageType = image.imageType,
                     //     fileId = response.fileId.toInt()
                     // )
-                    return CustomFaceFromFile(
+                    return OfflineGroupImage(
                         md5 = image.md5,
                         filepath = resourceId
                     ).also { ImageUploadEvent.Succeed(this@GroupImpl, image, it).broadcast() }

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

@@ -24,8 +24,8 @@ import net.mamoe.mirai.data.MemberInfo
 import net.mamoe.mirai.event.broadcast
 import net.mamoe.mirai.event.events.MessageRecallEvent
 import net.mamoe.mirai.message.data.*
-import net.mamoe.mirai.qqandroid.message.CustomFaceFromServer
-import net.mamoe.mirai.qqandroid.message.NotOnlineImageFromServer
+import net.mamoe.mirai.qqandroid.message.OnlineFriendImageImpl
+import net.mamoe.mirai.qqandroid.message.OnlineGroupImageImpl
 import net.mamoe.mirai.qqandroid.network.QQAndroidBotNetworkHandler
 import net.mamoe.mirai.qqandroid.network.QQAndroidClient
 import net.mamoe.mirai.qqandroid.network.protocol.packet.chat.GroupInfoImpl
@@ -58,6 +58,7 @@ internal abstract class QQAndroidBotBase constructor(
         )
     internal var firstLoginSucceed: Boolean = false
     override val uin: Long get() = client.uin
+
     @Deprecated(
         "use friends instead",
         level = DeprecationLevel.ERROR,
@@ -208,14 +209,14 @@ internal abstract class QQAndroidBotBase constructor(
         }
     }
 
-    override suspend fun queryImageUrl(image: Image): String = "http://gchat.qpic.cn" + when (image) {
-        is NotOnlineImageFromServer -> image.delegate.origUrl
-        is CustomFaceFromServer -> image.delegate.origUrl
-        is CustomFaceFromFile -> {
-            TODO()
+    override suspend fun queryImageUrl(image: Image): String = when (image) {
+        is OnlineFriendImageImpl -> image.originUrl
+        is OnlineGroupImageImpl -> image.originUrl
+        is OfflineGroupImage -> {
+            TODO("暂不支持获取离线图片链接")
         }
-        is NotOnlineImageFromFile -> {
-            TODO()
+        is OfflineFriendImage -> {
+            TODO("暂不支持获取离线图片链接")
         }
         else -> error("unsupported image class: ${image::class.simpleName}")
     }

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

@@ -38,7 +38,7 @@ internal fun At.toJceData(): ImMsgBody.Text {
     )
 }
 
-internal fun NotOnlineImageFromFile.toJceData(): ImMsgBody.NotOnlineImage {
+internal fun OfflineFriendImage.toJceData(): ImMsgBody.NotOnlineImage {
     return ImMsgBody.NotOnlineImage(
         filePath = this.filepath,
         resId = this.resourceId,
@@ -104,7 +104,7 @@ internal fun Face.toJceData(): ImMsgBody.Face {
     )
 }
 
-internal fun CustomFaceFromFile.toJceData(): ImMsgBody.CustomFace {
+internal fun OfflineGroupImage.toJceData(): ImMsgBody.CustomFace {
     return ImMsgBody.CustomFace(
         filePath = this.filepath,
         fileId = this.fileId,
@@ -240,10 +240,10 @@ internal fun MessageChain.toRichTextElems(forGroup: Boolean): MutableList<ImMsgB
                 elements.add(ImMsgBody.Elem(text = it.toJceData()))
                 elements.add(ImMsgBody.Elem(text = ImMsgBody.Text(str = " ")))
             }
-            is CustomFaceFromFile -> elements.add(ImMsgBody.Elem(customFace = it.toJceData()))
-            is CustomFaceFromServer -> elements.add(ImMsgBody.Elem(customFace = it.delegate))
-            is NotOnlineImageFromServer -> elements.add(ImMsgBody.Elem(notOnlineImage = it.delegate))
-            is NotOnlineImageFromFile -> elements.add(ImMsgBody.Elem(notOnlineImage = it.toJceData()))
+            is OfflineGroupImage -> elements.add(ImMsgBody.Elem(customFace = it.toJceData()))
+            is OnlineGroupImageImpl -> elements.add(ImMsgBody.Elem(customFace = it.delegate))
+            is OnlineFriendImageImpl -> elements.add(ImMsgBody.Elem(notOnlineImage = it.delegate))
+            is OfflineFriendImage -> elements.add(ImMsgBody.Elem(notOnlineImage = it.toJceData()))
             is AtAll -> elements.add(atAllData)
             is Face -> elements.add(ImMsgBody.Elem(face = it.toJceData()))
             is QuoteReplyToSend -> {
@@ -273,9 +273,9 @@ internal fun MessageChain.toRichTextElems(forGroup: Boolean): MutableList<ImMsgB
     return elements
 }
 
-internal class CustomFaceFromServer(
+internal class OnlineGroupImageImpl(
     internal val delegate: ImMsgBody.CustomFace
-) : CustomFace() {
+) : OnlineGroupImage() {
     override val filepath: String = delegate.filePath
     override val fileId: Int get() = delegate.fileId
     override val serverIp: Int get() = delegate.serverIp
@@ -293,9 +293,11 @@ internal class CustomFaceFromServer(
     override val original: Int get() = delegate.origin
     override val pbReserve: ByteArray get() = delegate.pbReserve
     override val imageId: String = ExternalImage.generateImageId(delegate.md5, imageType)
+    override val originUrl: String
+        get() = "http://gchat.qpic.cn" + delegate.origUrl
 
     override fun equals(other: Any?): Boolean {
-        return other is CustomFaceFromServer && other.filepath == this.filepath && other.md5.contentEquals(this.md5)
+        return other is OnlineGroupImageImpl && other.filepath == this.filepath && other.md5.contentEquals(this.md5)
     }
 
     override fun hashCode(): Int {
@@ -303,9 +305,9 @@ internal class CustomFaceFromServer(
     }
 }
 
-internal class NotOnlineImageFromServer(
+internal class OnlineFriendImageImpl(
     internal val delegate: ImMsgBody.NotOnlineImage
-) : NotOnlineImage() {
+) : OnlineFriendImage() {
     override val resourceId: String get() = delegate.resId
     override val md5: ByteArray get() = delegate.picMd5
     override val filepath: String get() = delegate.filePath
@@ -317,9 +319,12 @@ internal class NotOnlineImageFromServer(
     override val downloadPath: String get() = delegate.downloadPath
     override val fileId: Int get() = delegate.fileId
     override val original: Int get() = delegate.original
+    override val originUrl: String
+        get() = "http://c2cpicdw.qpic.cn" + this.delegate.origUrl
 
     override fun equals(other: Any?): Boolean {
-        return other is NotOnlineImageFromServer && other.resourceId == this.resourceId && other.md5.contentEquals(this.md5)
+        return other is OnlineFriendImageImpl && other.resourceId == this.resourceId && other.md5
+            .contentEquals(this.md5)
     }
 
     override fun hashCode(): Int {
@@ -368,8 +373,8 @@ internal fun List<ImMsgBody.Elem>.joinToMessageChain(message: MessageChainBuilde
     this.forEach {
         when {
             it.srcMsg != null -> message.add(QuoteReply(MessageSourceFromServer(it.srcMsg)))
-            it.notOnlineImage != null -> message.add(NotOnlineImageFromServer(it.notOnlineImage))
-            it.customFace != null -> message.add(CustomFaceFromServer(it.customFace))
+            it.notOnlineImage != null -> message.add(OnlineFriendImageImpl(it.notOnlineImage))
+            it.customFace != null -> message.add(OnlineGroupImageImpl(it.customFace))
             it.face != null -> message.add(Face(it.face.index))
             it.text != null -> {
                 if (it.text.attr6Buf.isEmpty()) {

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

@@ -18,8 +18,8 @@ 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.Image
 import net.mamoe.mirai.message.data.MessageChain
+import net.mamoe.mirai.message.data.OfflineImage
 import net.mamoe.mirai.message.data.id
 import net.mamoe.mirai.utils.ExternalImage
 import net.mamoe.mirai.utils.MiraiInternalAPI
@@ -32,6 +32,7 @@ import net.mamoe.mirai.utils.WeakRefProperty
  *
  * @author Him188moe
  */
+@Suppress("INAPPLICABLE_JVM_NAME")
 @UseExperimental(MiraiInternalAPI::class, JavaHappyAPI::class)
 actual abstract class Contact : CoroutineScope, ContactJavaHappyAPI() {
     /**
@@ -61,6 +62,8 @@ actual abstract class Contact : CoroutineScope, ContactJavaHappyAPI() {
      *
      * @return 消息回执. 可 [引用回复][MessageReceipt.quote]（仅群聊）或 [撤回][MessageReceipt.recall] 这条消息.
      */
+    @JvmName("sendMessgaeSuspend")
+    @JvmSynthetic
     actual abstract suspend fun sendMessage(message: MessageChain): MessageReceipt<out Contact>
 
     /**
@@ -72,7 +75,9 @@ actual abstract class Contact : CoroutineScope, ContactJavaHappyAPI() {
      * @throws EventCancelledException 当发送消息事件被取消
      * @throws OverFileSizeMaxException 当图片文件过大而被服务器拒绝上传时. (最大大小约为 20 MB)
      */
-    actual abstract suspend fun uploadImage(image: ExternalImage): Image
+    @JvmName("uploadImageSuspend")
+    @JvmSynthetic
+    actual abstract suspend fun uploadImage(image: ExternalImage): OfflineImage
 
     /**
      * 判断 `this` 和 [other] 是否是相同的类型, 并且 [id] 相同.

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

@@ -17,11 +17,15 @@ 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.OfflineGroupImage
+import net.mamoe.mirai.utils.ExternalImage
 import net.mamoe.mirai.utils.MiraiExperimentalAPI
+import net.mamoe.mirai.utils.OverFileSizeMaxException
 
 /**
  * 群. 在 QQ Android 中叫做 "Troop"
  */
+@Suppress("INAPPLICABLE_JVM_NAME")
 actual abstract class Group : Contact(), CoroutineScope {
     /**
      * 群名称.
@@ -33,6 +37,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @throws PermissionDeniedException 无权限修改时将会抛出异常
      */
     actual abstract var name: String
+
     /**
      * 入群公告, 没有时为空字符串.
      *
@@ -42,6 +47,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @throws PermissionDeniedException 无权限修改时将会抛出异常
      */
     actual abstract var entranceAnnouncement: String
+
     /**
      * 全体禁言状态. `true` 为开启.
      *
@@ -51,6 +57,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @throws PermissionDeniedException 无权限修改时将会抛出异常
      */
     actual abstract var isMuteAll: Boolean
+
     /**
      * 坦白说状态. `true` 为允许.
      *
@@ -60,6 +67,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @throws PermissionDeniedException 无权限修改时将会抛出异常
      */
     actual abstract var isConfessTalkEnabled: Boolean
+
     /**
      * 允许群员邀请好友入群的状态. `true` 为允许
      *
@@ -69,29 +77,35 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @throws PermissionDeniedException 无权限修改时将会抛出异常
      */
     actual abstract var isAllowMemberInvite: Boolean
+
     /**
      * 自动加群审批
      */
     actual abstract val isAutoApproveEnabled: Boolean
+
     /**
      * 匿名聊天
      */
     actual abstract val isAnonymousChatEnabled: Boolean
+
     /**
      * 同为 groupCode, 用户看到的群号码.
      */
     actual abstract override val id: Long
+
     /**
      * 群主.
      *
      * @return 若机器人是群主, 返回 [botAsMember]. 否则返回相应的成员
      */
     actual abstract val owner: Member
+
     /**
      * [Bot] 在群内的 [Member] 实例
      */
     @MiraiExperimentalAPI
     actual abstract val botAsMember: Member
+
     /**
      * 机器人被禁言还剩余多少秒
      *
@@ -99,6 +113,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @see isBotMuted 判断机器人是否正在被禁言
      */
     actual abstract val botMuteRemaining: Int
+
     /**
      * 机器人在这个群里的权限
      *
@@ -108,6 +123,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @see BotGroupPermissionChangeEvent 机器人群员修改
      */
     actual abstract val botPermission: MemberPermission
+
     /**
      * 群头像下载链接.
      */
@@ -161,8 +177,23 @@ actual abstract class Group : Contact(), CoroutineScope {
      *
      * @return 消息回执. 可进行撤回 ([MessageReceipt.recall])
      */
+    @JvmName("sendMessageSuspend")
+    @JvmSynthetic
     actual abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<Group>
 
+    /**
+     * 上传一个图片以备发送.
+     *
+     * @see BeforeImageUploadEvent 图片发送前事件, cancellable
+     * @see ImageUploadEvent 图片发送完成事件
+     *
+     * @throws EventCancelledException 当发送消息事件被取消
+     * @throws OverFileSizeMaxException 当图片文件过大而被服务器拒绝上传时. (最大大小约为 20 MB)
+     */
+    @JvmName("uploadImageSuspend")
+    @JvmSynthetic
+    actual abstract override suspend fun uploadImage(image: ExternalImage): OfflineGroupImage
+
     actual companion object {
         /**
          * by @kar98k

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

@@ -7,12 +7,17 @@ import net.mamoe.mirai.Bot
 import net.mamoe.mirai.data.FriendNameRemark
 import net.mamoe.mirai.data.PreviousNameList
 import net.mamoe.mirai.data.Profile
+import net.mamoe.mirai.event.events.BeforeImageUploadEvent
 import net.mamoe.mirai.event.events.EventCancelledException
+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.MessageChain
+import net.mamoe.mirai.message.data.OfflineFriendImage
+import net.mamoe.mirai.utils.ExternalImage
 import net.mamoe.mirai.utils.MiraiExperimentalAPI
+import net.mamoe.mirai.utils.OverFileSizeMaxException
 
 /**
  * QQ 对象.
@@ -84,4 +89,17 @@ actual abstract class QQ : Contact(), CoroutineScope {
     @JvmName("sendMessageSuspend")
     @JvmSynthetic
     actual abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<QQ>
+
+    /**
+     * 上传一个图片以备发送.
+     *
+     * @see BeforeImageUploadEvent 图片发送前事件, cancellable
+     * @see ImageUploadEvent 图片发送完成事件
+     *
+     * @throws EventCancelledException 当发送消息事件被取消
+     * @throws OverFileSizeMaxException 当图片文件过大而被服务器拒绝上传时. (最大大小约为 20 MB)
+     */
+    @JvmName("uploadImageSuspend")
+    @JvmSynthetic
+    actual abstract override suspend fun uploadImage(image: ExternalImage): OfflineFriendImage
 }

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

@@ -82,7 +82,7 @@ expect abstract class Contact() : CoroutineScope, ContactJavaHappyAPI {
      */
     @JvmName("uploadImageSuspend")
     @JvmSynthetic
-    abstract suspend fun uploadImage(image: ExternalImage): Image
+    abstract suspend fun uploadImage(image: ExternalImage): OfflineImage
 
     /**
      * 判断 `this` 和 [other] 是否是相同的类型, 并且 [id] 相同.

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

@@ -19,7 +19,10 @@ 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.OfflineGroupImage
+import net.mamoe.mirai.utils.ExternalImage
 import net.mamoe.mirai.utils.MiraiExperimentalAPI
+import net.mamoe.mirai.utils.OverFileSizeMaxException
 import kotlin.jvm.JvmName
 import kotlin.jvm.JvmSynthetic
 
@@ -177,6 +180,19 @@ expect abstract class Group() : Contact, CoroutineScope {
     @JvmSynthetic
     abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<Group>
 
+    /**
+     * 上传一个图片以备发送.
+     *
+     * @see BeforeImageUploadEvent 图片发送前事件, cancellable
+     * @see ImageUploadEvent 图片发送完成事件
+     *
+     * @throws EventCancelledException 当发送消息事件被取消
+     * @throws OverFileSizeMaxException 当图片文件过大而被服务器拒绝上传时. (最大大小约为 20 MB)
+     */
+    @JvmName("uploadImageSuspend")
+    @JvmSynthetic
+    abstract override suspend fun uploadImage(image: ExternalImage): OfflineGroupImage
+
     companion object {
         // don't @JvmStatic: JDK 1.8 required
         fun calculateGroupUinByGroupCode(groupCode: Long): Long

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

@@ -16,12 +16,17 @@ import net.mamoe.mirai.Bot
 import net.mamoe.mirai.data.FriendNameRemark
 import net.mamoe.mirai.data.PreviousNameList
 import net.mamoe.mirai.data.Profile
+import net.mamoe.mirai.event.events.BeforeImageUploadEvent
 import net.mamoe.mirai.event.events.EventCancelledException
+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.MessageChain
+import net.mamoe.mirai.message.data.OfflineFriendImage
+import net.mamoe.mirai.utils.ExternalImage
 import net.mamoe.mirai.utils.MiraiExperimentalAPI
+import net.mamoe.mirai.utils.OverFileSizeMaxException
 import kotlin.jvm.JvmName
 import kotlin.jvm.JvmSynthetic
 
@@ -95,5 +100,16 @@ expect abstract class QQ() : Contact, CoroutineScope {
     @JvmName("sendMessageSuspend")
     abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<QQ>
 
-
+    /**
+     * 上传一个图片以备发送.
+     *
+     * @see BeforeImageUploadEvent 图片发送前事件, cancellable
+     * @see ImageUploadEvent 图片发送完成事件
+     *
+     * @throws EventCancelledException 当发送消息事件被取消
+     * @throws OverFileSizeMaxException 当图片文件过大而被服务器拒绝上传时. (最大大小约为 20 MB)
+     */
+    @JvmName("uploadImageSuspend")
+    @JvmSynthetic
+    abstract override suspend fun uploadImage(image: ExternalImage): OfflineFriendImage
 }

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

@@ -16,26 +16,21 @@ package net.mamoe.mirai.message.data
 
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.Transient
+import net.mamoe.mirai.Bot
+import net.mamoe.mirai.BotImpl
+import net.mamoe.mirai.contact.Contact
+import net.mamoe.mirai.contact.Group
+import net.mamoe.mirai.utils.MiraiInternalAPI
 import net.mamoe.mirai.utils.io.chunkedHexToBytes
 import kotlin.js.JsName
 import kotlin.jvm.JvmMultifileClass
 import kotlin.jvm.JvmName
-import kotlin.jvm.JvmStatic
 
 /**
  * 自定义表情 (收藏的表情), 图片
  */
-sealed class Image : Message, MessageContent {
-    companion object Key : Message.Key<Image> {
-        @JvmStatic
-        @JsName("fromId")
-        @JvmName("fromId")
-        operator fun invoke(imageId: String): Image = when (imageId.length) {
-            37 -> NotOnlineImageFromFile(imageId) // /f8f1ab55-bf8e-4236-b55e-955848d7069f
-            42 -> CustomFaceFromFile(imageId) // {01E9451B-70ED-EAE3-B37C-101F1EEBF5B5}.png
-            else -> throw IllegalArgumentException("Bad imageId, expecting length=37 or 42, got ${imageId.length}")
-        }
-    }
+interface Image : Message, MessageContent {
+    companion object Key : Message.Key<Image>
 
     /**
      * 图片的 id. 只需要有这个 id 即可发送图片.
@@ -44,14 +39,84 @@ sealed class Image : Message, MessageContent {
      * 好友图片的 id: `/f8f1ab55-bf8e-4236-b55e-955848d7069f`
      * 群图片的 id: `{01E9451B-70ED-EAE3-B37C-101F1EEBF5B5}.png`
      */
-    abstract val imageId: String
+    val imageId: String
+}
 
+@Suppress("FunctionName")
+@JsName("newImage")
+@JvmName("newImage")
+fun Image(imageId: String): Image = when (imageId.length) {
+    37 -> OfflineFriendImage(imageId) // /f8f1ab55-bf8e-4236-b55e-955848d7069f
+    42 -> OfflineGroupImage(imageId) // {01E9451B-70ED-EAE3-B37C-101F1EEBF5B5}.png
+    else -> throw IllegalArgumentException("Bad imageId, expecting length=37 or 42, got ${imageId.length}")
+}
+
+@MiraiInternalAPI("使用 Image")
+abstract class AbstractImage internal constructor() : Image {
     final override fun toString(): String {
         return "[mirai:$imageId]"
     }
 }
 
-abstract class CustomFace : Image() {
+// region 在线图片
+
+/**
+ * 在服务器上的图片. 它可以直接获取下载链接.
+ *
+ * 一般由 [Contact.uploadImage] 得到
+ */
+interface OnlineImage : Image {
+    /**
+     * 原图下载链接. 包含域名
+     */
+    val originUrl: String
+}
+
+/**
+ * 查询原图下载链接.
+ */
+suspend fun Image.queryUrl(): String {
+    @UseExperimental(MiraiInternalAPI::class)
+    return when (this) {
+        is OnlineImage -> this.originUrl
+        else -> BotImpl.instances.peekFirst().get()?.queryImageUrl(this)
+            ?: error("No Bot available to query image url")
+    }
+}
+
+// endregion 在线图片
+
+
+// region 离线图片
+
+/**
+ * 离线的图片, 即为客户端主动上传到服务器而获得的 [Image] 实例.
+ * 不能直接获取它在服务器上的链接. 需要通过 [Bot.queryImageUrl] 查询
+ *
+ * 一般由 [Contact.uploadImage] 得到
+ * @see queryOriginUrl
+ */
+interface OfflineImage : Image
+
+/**
+ * 原图下载链接. 包含域名
+ */
+suspend fun OfflineImage.queryOriginUrl(): String {
+    @UseExperimental(MiraiInternalAPI::class)
+    return BotImpl.instances.peekFirst().get()?.queryImageUrl(this) ?: error("No Bot available to query image url")
+}
+
+// endregion 离线图片
+
+// region 群图片
+
+
+/**
+ * 群图片
+ */
+// CustomFace
+@UseExperimental(MiraiInternalAPI::class)
+sealed class GroupImage : AbstractImage() {
     abstract val filepath: String
     abstract val fileId: Int
     abstract val serverIp: Int
@@ -70,30 +135,14 @@ abstract class CustomFace : Image() {
     abstract val original: Int
 }
 
-private val EMPTY_BYTE_ARRAY = ByteArray(0)
-
-private fun calculateImageMd5ByImageId(imageId: String): ByteArray {
-    return if (imageId.startsWith('/')) {
-        imageId
-            .drop(1)
-            .replace("-", "")
-            .take(16 * 2)
-            .chunkedHexToBytes()
-    } else {
-        imageId
-            .substringAfter('{')
-            .substringBefore('}')
-            .replace("-", "")
-            .take(16 * 2)
-            .chunkedHexToBytes()
-    }
-}
-
+/**
+ * 通过 [Group.uploadImage] 上传得到的 [GroupImage]. 它的链接需要查询 [Bot.queryImageUrl]
+ */
 @Serializable
-data class CustomFaceFromFile(
+data class OfflineGroupImage(
     override val filepath: String, // {01E9451B-70ED-EAE3-B37C-101F1EEBF5B5}.png
     override val md5: ByteArray
-) : CustomFace() {
+) : GroupImage(), OfflineImage {
     constructor(imageId: String) : this(filepath = imageId, md5 = calculateImageMd5ByImageId(imageId))
 
     override val fileId: Int get() = 0
@@ -117,14 +166,26 @@ data class CustomFaceFromFile(
     }
 
     override fun equals(other: Any?): Boolean {
-        return other is CustomFaceFromFile && other.md5.contentEquals(this.md5) && other.filepath == this.filepath
+        return other is OfflineGroupImage && other.md5.contentEquals(this.md5) && other.filepath == this.filepath
     }
 }
 
 /**
- * 电脑可能看不到这个消息.
+ * 接收消息时获取到的 [GroupImage]. 它可以直接获取下载链接 [originUrl]
  */
-abstract class NotOnlineImage : Image() {
+abstract class OnlineGroupImage : GroupImage(), OnlineImage
+
+
+// endregion 群图片
+
+// region 好友图片
+
+
+/**
+ * 好友图片
+ */ // NotOnlineImage
+@UseExperimental(MiraiInternalAPI::class)
+sealed class FriendImage : AbstractImage() {
     abstract val resourceId: String
     abstract val md5: ByteArray
     abstract val filepath: String
@@ -140,7 +201,10 @@ abstract class NotOnlineImage : Image() {
     override val imageId: String get() = resourceId
 }
 
-data class NotOnlineImageFromFile(
+/**
+ * 通过 [Group.uploadImage] 上传得到的 [GroupImage]. 它的链接需要查询 [Bot.queryImageUrl]
+ */
+data class OfflineFriendImage(
     override val resourceId: String,
     override val md5: ByteArray,
     @Transient override val filepath: String = resourceId,
@@ -151,7 +215,7 @@ data class NotOnlineImageFromFile(
     @Transient override val imageType: Int = 1000,
     @Transient override val downloadPath: String = resourceId,
     @Transient override val fileId: Int = 0
-) : NotOnlineImage() {
+) : FriendImage(), OfflineImage {
     constructor(imageId: String) : this(resourceId = imageId, md5 = calculateImageMd5ByImageId(imageId))
 
     override fun hashCode(): Int {
@@ -159,6 +223,39 @@ data class NotOnlineImageFromFile(
     }
 
     override fun equals(other: Any?): Boolean {
-        return other is NotOnlineImageFromFile && other.md5.contentEquals(this.md5) && other.resourceId == this.resourceId
+        return other is OfflineFriendImage && other.md5
+            .contentEquals(this.md5) && other.resourceId == this.resourceId
     }
-}
+}
+
+/**
+ * 接收消息时获取到的 [FriendImage]. 它可以直接获取下载链接 [originUrl]
+ */
+abstract class OnlineFriendImage : FriendImage(), OnlineImage
+
+
+// endregion
+
+
+// region internal
+
+private val EMPTY_BYTE_ARRAY = ByteArray(0)
+
+private fun calculateImageMd5ByImageId(imageId: String): ByteArray {
+    return if (imageId.startsWith('/')) {
+        imageId
+            .drop(1)
+            .replace("-", "")
+            .take(16 * 2)
+            .chunkedHexToBytes()
+    } else {
+        imageId
+            .substringAfter('{')
+            .substringBefore('}')
+            .replace("-", "")
+            .take(16 * 2)
+            .chunkedHexToBytes()
+    }
+}
+
+// endregion

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

@@ -18,8 +18,8 @@ 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.Image
 import net.mamoe.mirai.message.data.MessageChain
+import net.mamoe.mirai.message.data.OfflineImage
 import net.mamoe.mirai.message.data.id
 import net.mamoe.mirai.utils.ExternalImage
 import net.mamoe.mirai.utils.MiraiInternalAPI
@@ -76,7 +76,7 @@ actual abstract class Contact : CoroutineScope, ContactJavaHappyAPI() {
      */
     @JvmName("uploadImageSuspend")
     @JvmSynthetic
-    actual abstract suspend fun uploadImage(image: ExternalImage): Image
+    actual abstract suspend fun uploadImage(image: ExternalImage): OfflineImage
 
     /**
      * 判断 `this` 和 [other] 是否是相同的类型, 并且 [id] 相同.

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

@@ -17,11 +17,15 @@ 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.OfflineGroupImage
+import net.mamoe.mirai.utils.ExternalImage
 import net.mamoe.mirai.utils.MiraiExperimentalAPI
+import net.mamoe.mirai.utils.OverFileSizeMaxException
 
 /**
  * 群. 在 QQ Android 中叫做 "Troop"
  */
+@Suppress("INAPPLICABLE_JVM_NAME")
 actual abstract class Group : Contact(), CoroutineScope {
     /**
      * 群名称.
@@ -33,6 +37,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @throws PermissionDeniedException 无权限修改时将会抛出异常
      */
     actual abstract var name: String
+
     /**
      * 入群公告, 没有时为空字符串.
      *
@@ -42,6 +47,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @throws PermissionDeniedException 无权限修改时将会抛出异常
      */
     actual abstract var entranceAnnouncement: String
+
     /**
      * 全体禁言状态. `true` 为开启.
      *
@@ -51,6 +57,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @throws PermissionDeniedException 无权限修改时将会抛出异常
      */
     actual abstract var isMuteAll: Boolean
+
     /**
      * 坦白说状态. `true` 为允许.
      *
@@ -60,6 +67,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @throws PermissionDeniedException 无权限修改时将会抛出异常
      */
     actual abstract var isConfessTalkEnabled: Boolean
+
     /**
      * 允许群员邀请好友入群的状态. `true` 为允许
      *
@@ -69,29 +77,35 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @throws PermissionDeniedException 无权限修改时将会抛出异常
      */
     actual abstract var isAllowMemberInvite: Boolean
+
     /**
      * 自动加群审批
      */
     actual abstract val isAutoApproveEnabled: Boolean
+
     /**
      * 匿名聊天
      */
     actual abstract val isAnonymousChatEnabled: Boolean
+
     /**
      * 同为 groupCode, 用户看到的群号码.
      */
     actual abstract override val id: Long
+
     /**
      * 群主.
      *
      * @return 若机器人是群主, 返回 [botAsMember]. 否则返回相应的成员
      */
     actual abstract val owner: Member
+
     /**
      * [Bot] 在群内的 [Member] 实例
      */
     @MiraiExperimentalAPI
     actual abstract val botAsMember: Member
+
     /**
      * 机器人被禁言还剩余多少秒
      *
@@ -99,6 +113,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @see isBotMuted 判断机器人是否正在被禁言
      */
     actual abstract val botMuteRemaining: Int
+
     /**
      * 机器人在这个群里的权限
      *
@@ -108,6 +123,7 @@ actual abstract class Group : Contact(), CoroutineScope {
      * @see BotGroupPermissionChangeEvent 机器人群员修改
      */
     actual abstract val botPermission: MemberPermission
+
     /**
      * 群头像下载链接.
      */
@@ -161,9 +177,23 @@ actual abstract class Group : Contact(), CoroutineScope {
      *
      * @return 消息回执. 可进行撤回 ([MessageReceipt.recall])
      */
+    @JvmName("sendMessageSuspend")
     @JvmSynthetic
     actual abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<Group>
 
+    /**
+     * 上传一个图片以备发送.
+     *
+     * @see BeforeImageUploadEvent 图片发送前事件, cancellable
+     * @see ImageUploadEvent 图片发送完成事件
+     *
+     * @throws EventCancelledException 当发送消息事件被取消
+     * @throws OverFileSizeMaxException 当图片文件过大而被服务器拒绝上传时. (最大大小约为 20 MB)
+     */
+    @JvmName("uploadImageSuspend")
+    @JvmSynthetic
+    actual abstract override suspend fun uploadImage(image: ExternalImage): OfflineGroupImage
+
     actual companion object {
         /**
          * by @kar98k

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

@@ -7,12 +7,17 @@ import net.mamoe.mirai.Bot
 import net.mamoe.mirai.data.FriendNameRemark
 import net.mamoe.mirai.data.PreviousNameList
 import net.mamoe.mirai.data.Profile
+import net.mamoe.mirai.event.events.BeforeImageUploadEvent
 import net.mamoe.mirai.event.events.EventCancelledException
+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.MessageChain
+import net.mamoe.mirai.message.data.OfflineFriendImage
+import net.mamoe.mirai.utils.ExternalImage
 import net.mamoe.mirai.utils.MiraiExperimentalAPI
+import net.mamoe.mirai.utils.OverFileSizeMaxException
 
 /**
  * QQ 对象.
@@ -85,4 +90,16 @@ actual abstract class QQ : Contact(), CoroutineScope {
     @JvmSynthetic
     actual abstract override suspend fun sendMessage(message: MessageChain): MessageReceipt<QQ>
 
+    /**
+     * 上传一个图片以备发送.
+     *
+     * @see BeforeImageUploadEvent 图片发送前事件, cancellable
+     * @see ImageUploadEvent 图片发送完成事件
+     *
+     * @throws EventCancelledException 当发送消息事件被取消
+     * @throws OverFileSizeMaxException 当图片文件过大而被服务器拒绝上传时. (最大大小约为 20 MB)
+     */
+    @JvmSynthetic
+    @JvmName("uploadImageSuspend")
+    actual abstract override suspend fun uploadImage(image: ExternalImage): OfflineFriendImage
 }