FriendImage

sealed class FriendImage : AbstractImage

好友图片

imageId 形如 /f8f1ab55-bf8e-4236-b55e-955848d7069f (37 长度) 或 /000000000-3814297509-BFB7027B9354B8F899A062061D74E206 (54 长度)

Key	`companion object Key : Key<FriendImage>`

此 Key 指代的 Message 类型名. 一般为 class.simpleName, 如 "QuoteReply", "PlainText"

val typeName: String

md5	`val Image.md5: ByteArray`

flash	`fun FriendImage.flash(): FriendFlashImage`
flash2	`fun FriendImage.flash2(): FriendFlashImage`
flatten	扁平化 Message `fun Message.flatten(): Sequence<SingleMessage>`
isContentEmpty	判断消息内容是否为空. `fun Message.isContentEmpty(): Boolean`
isContentNotEmpty	`fun Message.isContentNotEmpty(): Boolean`
isNotPlain	`fun Message.isNotPlain(): Boolean`
isNotPlain2	`fun Message.isNotPlain2(): Boolean`
isPlain	`fun Message.isPlain(): Boolean`
isPlain2	`fun Message.isPlain2(): Boolean`
queryUrl	查询原图下载链接. `suspend fun Image.queryUrl(): String`
repeat	`fun Message.repeat(count: Int): MessageChain`
repeat2	`fun Message.repeat2(count: Int): MessageChain`
sendTo	`suspend fun <C : Contact> Message.sendTo(contact: C): MessageReceipt<C>`
times	`operator fun Message.times(count: Int): MessageChain`
toForwardMessage	转换为 ForwardMessage `fun Message.toForwardMessage(sender: User, time: Int = currentTimeSeconds.toInt(), displayStrategy: DisplayStrategy = DisplayStrategy): ForwardMessage` `fun Message.toForwardMessage(senderId: Long, senderName: String, time: Int = currentTimeSeconds.toInt(), displayStrategy: DisplayStrategy = DisplayStrategy): ForwardMessage`

OfflineFriendImage	通过 Group.uploadImage 上传得到的 GroupImage. 它的链接需要查询 Bot.queryImageUrl `data class OfflineFriendImage : FriendImage, OfflineImage`
OnlineFriendImage	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`