feat: support generate ascii art with reply

src/main/kotlin/cn/rtast/fancybot/FancyBot.kt

@@ -76,19 +76,26 @@ class FancyBot : OneBotListener {
             calculateResult?.let { message.reply(calculateResult) }
         }
 
-        if (message.message.any { it.type == ArrayMessageType.reply }) {  // Image url parse
+        if (message.message.any { it.type == ArrayMessageType.reply }) {
             val command = message.message.reversed().find { it.type == ArrayMessageType.text }!!.data.text!!
             val replyId = message.message.find { it.type == ArrayMessageType.reply }!!.data.id!!
-            if (command.contains("图来") || command.contains("图链")) {
             val getMsg = this.getMessage(replyId.toString().toLong())
+            if (command.contains("/ascii") || command.contains("/asc")) {
+                // 使用回复消息的方式直接对一个图片进行生成Ascii art的操作
+                val url = AsciiArtCommand.getImageUrl(getMsg)
+                val image = AsciiArtCommand.generateAsciiArt(url)
+                message.reply(image)
+            }
+            if (command.contains("图来") || command.contains("图链")) {
+                // 获取一个或多个图片的链接, 并且生成一个或多个短链接
                 ImageURLCommand.callback(message, getMsg)
             }
             if (command.contains("reaction")) {
-                val getMsg = this.getMessage(replyId.toString().toLong())
+                // 使用reaction刷屏回应一条消息
                 ReactionCommand.reaction(this, message, getMsg.messageId)
             }
             if (command.contains("图床")) {
-                val getMsg = this.getMessage(replyId.toString().toLong())
+                // 将一个图片上传到图床
                 val imagesUrl = ImageURLCommand.getImageUrl(getMsg)
                 if (imagesUrl.isEmpty()) {
                     message.reply("这个消息里没有图片呢!")

src/main/kotlin/cn/rtast/fancybot/commands/parse/AsciiArtCommand.kt

@@ -15,11 +15,13 @@ import cn.rtast.fancybot.util.misc.ImageBed
 import cn.rtast.fancybot.util.misc.makeGif
 import cn.rtast.fancybot.util.str.encodeToBase64
 import cn.rtast.fancybot.util.misc.toByteArray
+import cn.rtast.rob.entity.GetMessage
 import cn.rtast.rob.entity.GroupMessage
 import cn.rtast.rob.enums.ArrayMessageType
 import cn.rtast.rob.util.BaseCommand
 import cn.rtast.rob.util.ob.MessageChain
 import cn.rtast.rob.util.ob.OneBotListener
+import cn.rtast.rob.util.ob.asMessageChain
 import com.madgag.gif.fmsware.GifDecoder
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
@@ -91,14 +93,7 @@ class AsciiArtCommand : BaseCommand() {
             return img
         }
 
-        suspend fun callback(message: GroupMessage) {
+        suspend fun generateAsciiArt(url: String): MessageChain {
-            if (message.sender.userId !in waitingList) return
-            waitingList.removeIf { it == message.sender.userId }
-            if (message.message.any { it.type == ArrayMessageType.image }
-                || message.message.any { it.type == ArrayMessageType.mface }) {
-                val url = if (message.message.any { it.type == ArrayMessageType.image })
-                    message.message.find { it.type == ArrayMessageType.image }!!.data.file!!
-                else message.message.find { it.type == ArrayMessageType.mface }!!.data.url!!
             val gifStream = withContext(Dispatchers.IO) { URI(url).toURL().openStream() }
             val decoder = GifDecoder()
             try {
@@ -113,7 +108,7 @@ class AsciiArtCommand : BaseCommand() {
                         .addImage(imageBytes.encodeToBase64(), true)
                         .addText(imageBedUrl)
                         .build()
-                        message.reply(msg)
+                    return msg
                 } else {
                     logger.info("制作GIF Ascii art中, 总帧数: ${decoder.frameCount}")
                     val frames = (0 until decoder.frameCount).map { decoder.getFrame(it) }
@@ -134,19 +129,53 @@ class AsciiArtCommand : BaseCommand() {
                         .addImage(gifBase64, true)
                         .addText(imageBedUrl)
                         .build()
-                        message.reply(msg)
+                    return msg
                 }
             } catch (_: OutOfMemoryError) {
-                    message.reply("GIF处理失败: 内存溢出")
+                return listOf("GIF处理失败: 内存溢出").asMessageChain()
                 logger.info("GIF处理失败: 内存溢出")
             } catch (e: Exception) {
-                    message.reply("处理GIF失败: ${e.message}")
+                return listOf("处理GIF失败: ${e.message}").asMessageChain()
                 logger.info("gif处理失败: ${e.message}")
             }
+        }
+
+        suspend fun callback(message: GroupMessage) {
+            if (message.sender.userId !in waitingList) return
+            waitingList.removeIf { it == message.sender.userId }
+            if (message.message.any { it.type == ArrayMessageType.image }
+                || message.message.any { it.type == ArrayMessageType.mface }) {
+                val url = this.getImageUrl(message)
+                val msg = this.generateAsciiArt(url)
+                message.reply(msg)
             } else {
                 message.reply("回复错误已取消本次操作")
             }
         }
+
+        fun getImageUrl(groupMessage: GroupMessage): String {
+            return getImageUrlFromUnified(toUnifiedMessage(groupMessage))
+        }
+
+        fun getImageUrl(getMessageData: GetMessage.Data): String {
+            return getImageUrlFromUnified(toUnifiedMessage(getMessageData))
+        }
+
+        private fun getImageUrlFromUnified(messages: List<UnifiedMessage>): String {
+            return if (messages.any { it.type == ArrayMessageType.image })
+                messages.find { it.type == ArrayMessageType.image }!!.file!!
+            else messages.find { it.type == ArrayMessageType.mface }!!.url!!
+        }
+
+        private fun toUnifiedMessage(groupMessage: GroupMessage): List<UnifiedMessage> {
+            return groupMessage.message.map { UnifiedMessage(it.type, it.data.file, it.data.url) }
+        }
+
+        private fun toUnifiedMessage(getMessageData: GetMessage.Data): List<UnifiedMessage> {
+            return getMessageData.message.map { UnifiedMessage(it.type, it.data.file, it.data.url) }
+        }
+
+        private data class UnifiedMessage(val type: ArrayMessageType, val file: String?, val url: String?)
     }
 
     override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {