Implement loadHistoryMessages

src/main/kotlin/ai/devchat/devchat/ActionHandlerFactory.kt

@@ -13,6 +13,7 @@ class ActionHandlerFactory {
                 put(DevChatActions.SET_OR_UPDATE_KEY_REQUEST, SetOrUpdateKeyRequestHandler::class)
                 put(DevChatActions.LIST_COMMANDS_REQUEST, ListCommandsRequestHandler::class)
                 put(DevChatActions.LOAD_CONVERSATIONS_REQUEST, LoadConversationRequestHandler::class)
+                put(DevChatActions.LOAD_HISTORY_MESSAGES_REQUEST, LoadHistoryMessagesRequestHandler::class)
                 put(DevChatActions.LIST_TOPICS_REQUEST, ListTopicsRequestHandler::class)
                 put(DevChatActions.INSERT_CODE_REQUEST, InsertCodeRequestHandler::class)
                 put(DevChatActions.REPLACE_FILE_CONTENT_REQUEST, ReplaceFileContentHandler::class)

src/main/kotlin/ai/devchat/devchat/DevChatActions.kt

@@ -14,7 +14,6 @@ object DevChatActions {
     const val LOAD_CONVERSATIONS_RESPONSE = "loadConversations/response"
     const val LOAD_HISTORY_MESSAGES_REQUEST = "loadHistoryMessages/request"
     const val LOAD_HISTORY_MESSAGES_RESPONSE = "loadHistoryMessages/response"
-    const val LIST_CONVERSATIONS_RESPONSE = "listConversations/response"
     const val LIST_TOPICS_REQUEST = "listTopics/request"
     const val LIST_TOPICS_RESPONSE = "listTopics/response"
     const val INSERT_CODE_REQUEST = "insertCode/request"

src/main/kotlin/ai/devchat/devchat/handler/LoadHistoryMessagesRequestHandler.kt

@@ -0,0 +1,36 @@
+package ai.devchat.devchat.handler
+
+import ai.devchat.common.Log
+import ai.devchat.devchat.ActionHandler
+import ai.devchat.devchat.DevChatActionHandler
+import ai.devchat.devchat.DevChatActions
+import ai.devchat.idea.setting.DevChatSettingsState
+import ai.devchat.idea.storage.ActiveConversation
+import com.alibaba.fastjson.JSONObject
+
+class LoadHistoryMessagesRequestHandler(private val handler: DevChatActionHandler) : ActionHandler {
+    private var metadata: JSONObject? = null
+    private var payload: JSONObject? = null
+
+    private fun action(res: JSONObject) {
+        val pageSize = DevChatSettingsState.instance.maxLogCount
+        val pageIndex = metadata!!.getInteger("pageIndex") ?: 1
+        res["messages"] = ActiveConversation.getMessages(pageIndex, pageSize)
+    }
+
+    override fun executeAction() {
+        handler.handle(
+            DevChatActions.LOAD_HISTORY_MESSAGES_RESPONSE,
+            metadata!!.getString("callback"),
+            ::action
+        )
+    }
+
+    override fun setMetadata(metadata: JSONObject) {
+        this.metadata = metadata
+    }
+
+    override fun setPayload(payload: JSONObject) {
+        this.payload = payload
+    }
+}