优化

client/shared/redux/hooks/useUnread.ts

@@ -0,0 +1,32 @@
+import { useAppSelector } from './useAppSelector';
+import { useAckInfoChecker } from './useAckInfo';
+import { useEffect } from 'react';
+
+/**
+ * 返回某些会话是否有未读信息
+ */
+export function useUnread(converseIds: string[]) {
+  const ack = useAppSelector((state) => state.chat.ack);
+  const lastMessageMap = useAppSelector((state) => state.chat.lastMessageMap);
+  const { ensureAckInfo } = useAckInfoChecker();
+
+  useEffect(() => {
+    converseIds.forEach((converseId) => ensureAckInfo(converseId));
+  }, [converseIds]);
+
+  const unreadList = converseIds.map((converseId) => {
+    if (
+      ack[converseId] === undefined &&
+      lastMessageMap[converseId] !== undefined
+    ) {
+      // 远程没有已读记录且获取到了最后一条消息
+      return true;
+    }
+
+    // 当远端最后一条消息的id > 本地已读状态的最后一条消息id,
+    // 则返回true(有未读消息)
+    return lastMessageMap[converseId] > ack[converseId];
+  });
+
+  return unreadList;
+}