fix: refresh meme prompt on reload

src/main/kotlin/command/PluginCommands.kt

@@ -18,6 +18,7 @@ import top.jie65535.mirai.JChatGPT.reload
 import top.jie65535.mirai.config.PluginConfig
 import top.jie65535.mirai.config.ModelConfig
 import top.jie65535.mirai.config.ModelConfigMigration
+import top.jie65535.mirai.conversation.ConversationContext
 import top.jie65535.mirai.data.PluginData
 import top.jie65535.mirai.data.SkillStore
 import top.jie65535.mirai.data.TokenUsageStore
@@ -58,6 +59,7 @@ object PluginCommands : CompositeCommand(
             ProfileAutoMaintenance.clear()
         }
         SkillStore.reload()
+        ConversationContext.invalidateMemePromptCache()
         sendMessage("OK")
     }
 

src/main/kotlin/conversation/ConversationContext.kt

@@ -72,6 +72,39 @@ internal class ReplyIndex {
     fun indexOfIds(ids: String): Int? = indexByIds[ids]
 }
 
+internal class MemePromptCache {
+    private var prompt: String? = null
+
+    fun get(directoryPath: String): String = synchronized(this) {
+        prompt ?: buildPrompt(directoryPath).also { prompt = it }
+    }
+
+    fun clear() {
+        synchronized(this) { prompt = null }
+    }
+
+    private fun buildPrompt(directoryPath: String): String {
+        if (directoryPath.isEmpty()) return ""
+        return buildString {
+            val directory = File(directoryPath)
+            if (!directory.isDirectory) {
+                append("配置的meme路径不存在！")
+                return@buildString
+            }
+            append("memes文件夹地址为：").appendLine(directoryPath)
+            val memes = directory.list().orEmpty()
+            if (memes.isEmpty()) {
+                append("暂无表情包~")
+            } else {
+                memes.forEach { append("- ").appendLine(it) }
+                appendLine()
+                append("表情包示例：![").append(memes[0]).append("](")
+                    .append(File(directory, memes[0]).absoluteFile).appendLine(")")
+            }
+        }
+    }
+}
+
 internal object ConversationContext {
     private val chronologicalRecordOrder = compareBy<ChatMessageRecord> { it.time }
         .thenBy { if (it.id == 0L) Long.MAX_VALUE else it.id }
@@ -81,16 +114,21 @@ internal object ConversationContext {
     private val dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy年MM月dd E HH:mm:ss")
     private val shortTimeFormatter = DateTimeFormatter.ofPattern("HH:mm")
         .withZone(ZoneOffset.systemDefault())
-    private var memePrompt: String? = null
+    private val memePromptCache = MemePromptCache()
 
     fun clearCache() {
         synchronized(contextCache) { contextCache.clear() }
     }
 
+    fun invalidateMemePromptCache() {
+        memePromptCache.clear()
+    }
+
     fun clearAll() {
         synchronized(contextCache) { contextCache.clear() }
         synchronized(replyIndexes) { replyIndexes.clear() }
         synchronized(imageIndexes) { imageIndexes.clear() }
+        memePromptCache.clear()
     }
 
     fun cache(subjectId: Long): ConversationCache? = synchronized(contextCache) {
@@ -150,7 +188,7 @@ internal object ConversationContext {
         replace("{skills}") {
             if (PluginConfig.skillsEnabled) SkillStore.buildIndexPrompt() else "暂无技能"
         }
-        replace("{meme}") { buildMemePrompt() }
+        replace("{meme}") { memePromptCache.get(PluginConfig.memeDir) }
         return prompt.toString()
     }
 
@@ -258,28 +296,6 @@ internal object ConversationContext {
         imageIndexes.getOrPut(subjectId) { ImageIndex() }
     }
 
-    private fun buildMemePrompt(): String {
-        memePrompt?.let { return it }
-        if (PluginConfig.memeDir.isEmpty()) return ""
-        return buildString {
-            val directory = File(PluginConfig.memeDir)
-            if (!directory.isDirectory) {
-                append("配置的meme路径不存在！")
-                return@buildString
-            }
-            append("memes文件夹地址为：").appendLine(PluginConfig.memeDir)
-            val memes = directory.list().orEmpty()
-            if (memes.isEmpty()) {
-                append("暂无表情包~")
-            } else {
-                memes.forEach { append("- ").appendLine(it) }
-                appendLine()
-                append("表情包示例：![").append(memes[0]).append("](")
-                    .append(File(directory, memes[0]).absoluteFile).appendLine(")")
-            }
-        }.also { memePrompt = it }
-    }
-
     private fun appendUserProfileContext(
         target: StringBuilder,
         history: List<ChatMessageRecord>,

src/test/kotlin/conversation/ConversationContextTest.kt

@@ -1,9 +1,12 @@
 package top.jie65535.mirai.conversation
 
+import java.nio.file.Files
 import net.mamoe.mirai.message.data.MessageSourceKind
 import top.jie65535.mirai.data.ChatMessageRecord
 import kotlin.test.Test
+import kotlin.test.assertContains
 import kotlin.test.assertEquals
+import kotlin.test.assertFalse
 import kotlin.test.assertNull
 
 class ConversationContextTest {
@@ -22,6 +25,25 @@ class ConversationContextTest {
         assertNull(index.indexOfIds("missing"))
     }
 
+    @Test
+    fun memePromptCacheRefreshesDirectoryListingAfterClear() {
+        val directory = Files.createTempDirectory("jchatgpt-meme-prompt-test-")
+        try {
+            Files.createFile(directory.resolve("before.png"))
+            val cache = MemePromptCache()
+
+            assertContains(cache.get(directory.toString()), "before.png")
+
+            Files.createFile(directory.resolve("after.png"))
+            assertFalse(cache.get(directory.toString()).contains("after.png"))
+
+            cache.clear()
+            assertContains(cache.get(directory.toString()), "after.png")
+        } finally {
+            directory.toFile().deleteRecursively()
+        }
+    }
+
     private fun record(ids: String?, time: Int) = ChatMessageRecord(
         botId = 1,
         fromId = 2,