ISSUE 282 keep history messages in sync with storage

__tests__/services/ChatHistoryService.test.ts

@@ -61,13 +61,30 @@ describe("ChatHistoryService", () => {
 			setHistoryStorageValues(settings);
 			await saveChatHistory([mockMessage]);
 			expect(storage.setItem).not.toHaveBeenCalled();
+
+			const historyMessages = getHistoryMessages();
+			expect(historyMessages).toEqual([]);
 		});
 
 		it("should save history if not disabled", async () => {
 			setHistoryStorageValues(mockSettings(storageType));
 			await saveChatHistory([mockMessage]);
-			
+
 			expect(storage.setItem).toHaveBeenCalled();
+
+			const historyMessages = getHistoryMessages();
+			expect(historyMessages).toEqual([mockMessage]);
+		});
+
+		it("should retain previous history if not disabled and empty message array is passed", async () => {
+			setHistoryStorageValues(mockSettings(storageType));
+			await saveChatHistory([mockMessage]);
+			await saveChatHistory([]);
+
+			expect(storage.setItem).toHaveBeenCalledTimes(2);
+
+			const historyMessages = getHistoryMessages();
+			expect(historyMessages).toEqual([mockMessage]);
 		});
 
 		it("should handle empty message array without errors", async () => {

src/services/ChatHistoryService.tsx

@@ -51,6 +51,7 @@ const saveChatHistory = async (messages: Message[]) => {
 		parsedMessages = [...historyMessages.slice(-difference), ...parsedMessages]
 	}
 
+	historyMessages = parsedMessages;
 	setHistoryMessages(parsedMessages);
 }