javascript中的多维对象过滤

我有一个JSON响应，我想根据每个用户ID对synced值进行归档，以获得synced为false的用户数和synced为true的用户数。如果任何用户在任何活动下同步了值false，则结果应为false，否则为true。也没有必要在每个活动下都有所有用户

JSON对象如下所示：

[
{
“活动ID”：“302ce18c-d856-4c6a-b61c-69d5ff058c3d”，
“lmsActivityIdentifier”：“2729821”，
“名称”：“测试”，
“总积分”：6.0，
“lmsUserGrades”：[
{
“用户ID”：“1cee27a4-91e3-4975-a1d8-b31ece79db10”，
“LMSUSERIDIFIER”：“9991865”，
“总积分”：2.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“4ed71a4f-6ae1-4218-b122-f4e9eeefc03f”，
“LMSUSERIDIFIER”：“999111”，
“总积分”：3.0，
“同步”：正确，
“版本”：1
},
{
“用户ID”：“a8fcb57a-0f59-4104-a18d-d185eb003c0c”，
“LMSUSERIDIFIER”：“9991862”，
“总积分”：4.0，
“同步”：正确，
“版本”：1
},
{
“用户ID”：“54400abe-b25d-45fe-b77c-e1a0b90f0c86”，
“LMSUSERIDIFIER”：“9991864”，
“总积分”：1.0，
“同步”：正确，
“版本”：1
},
{
“用户ID”：“05afc973-37fe-4b6c-84ac-26b8c8255988”，
“LMSUSERIDIFIER”：“9991861”，
“总积分”：3.0，
“同步”：正确，
“版本”：1
}
],
“版本”：1
},
{
“活动ID”：“46aa19a1-5e0f-4dbf-a0bc-e7bcef46a703”，
“lmsActivityIdentifier”：“27292852”，
“名称”：“会话1”，
“总积分”：1.0，
“lmsUserGrades”：[
{
“用户ID”：“4ed71a4f-6ae1-4218-b122-f4e9eeefc03f”，
“LMSUSERIDIFIER”：“9991863”，
“总积分”：1.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“1cee27a4-91e3-4975-a1d8-b31ece79db10”，
“LMSUSERIDIFIER”：“9991865”，
“总积分”：0.0，
“同步”：正确，
“版本”：1
},
{
“用户ID”：“a8fcb57a-0f59-4104-a18d-d185eb003c0c”，
“LMSUSERIDIFIER”：“9991862”，
“总积分”：1.0，
“同步”：正确，
“版本”：1
},
{
“用户ID”：“54400abe-b25d-45fe-b77c-e1a0b90f0c86”，
“LMSUSERIDIFIER”：“9991864”，
“总积分”：0.5，
“同步”：正确，
“版本”：1
},
{
“用户ID”：“05afc973-37fe-4b6c-84ac-26b8c8255988”，
“LMSUSERIDIFIER”：“9991861”，
“总积分”：0.0，
“同步”：正确，
“版本”：1
}
],
“版本”：1
},
{
“活动ID”：“1f5b78b6-14df-4734-a57a-bcb84a774abf”，
“lmsActivityIdentifier”：“27292849”，
“名称”：“会话2”，
“总积分”：2.0，
“lmsUserGrades”：[
{
“用户ID”：“4ed71a4f-6ae1-4218-b122-f4e9eeefc03f”，
“LMSUSERIDIFIER”：“9991863”，
“总积分”：0.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“1cee27a4-91e3-4975-a1d8-b31ece79db10”，
“LMSUSERIDIFIER”：“9991865”，
“总积分”：2.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“05afc973-37fe-4b6c-84ac-26b8c8255988”，
“LMSUSERIDIFIER”：“9991861”，
“总积分”：35.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“a8fcb57a-0f59-4104-a18d-d185eb003c0c”，
“LMSUSERIDIFIER”：“9991862”，
“总积分”：0.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“54400abe-b25d-45fe-b77c-e1a0b90f0c86”，
“LMSUSERIDIFIER”：“9991864”，
“总积分”：1.0，
“已同步”：错误，
“版本”：1
}
],
“版本”：1
},
{
“活动ID”：“e5d541e6-d373-44c3-a665-15337026bd0e”，
“lmsActivityIdentifier”：“27292850”，
“名称”：“会话3”，
“总积分”：10.0，
“lmsUserGrades”：[
{
“用户ID”：“4ed71a4f-6ae1-4218-b122-f4e9eeefc03f”，
“LMSUSERIDIFIER”：“9991863”，
“总积分”：8.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“1cee27a4-91e3-4975-a1d8-b31ece79db10”，
“LMSUSERIDIFIER”：“9991865”，
“总积分”：8.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“a8fcb57a-0f59-4104-a18d-d185eb003c0c”，
“LMSUSERIDIFIER”：“9991862”，
“总积分”：5.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“54400abe-b25d-45fe-b77c-e1a0b90f0c86”，
“LMSUSERIDIFIER”：“9991864”，
“总积分”：4.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“05afc973-37fe-4b6c-84ac-26b8c8255988”，
“LMSUSERIDIFIER”：“9991861”，
“总积分”：8.0，
“已同步”：错误，
“版本”：1
}
],
“版本”：1
},
{
“活动ID”：“a9d09f86-d74c-4868-a2cf-ec80584cfba7”，
“lmsActivityIdentifier”：“27292848”，
“名称”：“会话4”，
“总积分”：3.0，
“lmsUserGrades”：[
{
“用户ID”：“4ed71a4f-6ae1-4218-b122-f4e9eeefc03f”，
“LMSUSERIDIFIER”：“9991863”，
“总积分”：1.0，
“已同步”：错误，
“版本”：1
},
{
“用户ID”：“1cee27a4-91e3-4975-a1d8-b31ece79db10”，
“LMSUSERIDIFIER”：“9991865”，
const countSynced = (activities) => {
  let res = {
    synced: 0,
    nonSynced: 0,
  };
  for (const activity of activities){
    for (const user of activity.lmsUserGrades){
      if (user.synced) res.synced++
      else res.nonSynced++;

    }
  }
  return res;
}

const data = [
   {
      "activityId":"302ce18c-d856-4c6a-b61c-69d5ff058c3d",
      "lmsActivityIdentifier":"27292821",
      "name":"test",
      "totalPoints":6.0,
      "lmsUserGrades":[
         {
            "userId":"1cee27a4-91e3-4975-a1d8-b31ece79db10",
            "lmsUserIdentifier":"9991865",
            "totalPoints":2.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"4ed71a4f-6ae1-4218-b122-f4e9eeefc03f",
            "lmsUserIdentifier":"9991111",
            "totalPoints":3.0,
            "synced":true,
            "version":1
         },
         {
            "userId":"a8fcb57a-0f59-4104-a18d-d185eb003c0c",
            "lmsUserIdentifier":"9991862",
            "totalPoints":4.0,
            "synced":true,
            "version":1
         },
         {
            "userId":"54400abe-b25d-45fe-b77c-e1a0b90f0c86",
            "lmsUserIdentifier":"9991864",
            "totalPoints":1.0,
            "synced":true,
            "version":1
         },
         {
            "userId":"05afc973-37fe-4b6c-84ac-26b8c8255988",
            "lmsUserIdentifier":"9991861",
            "totalPoints":3.0,
            "synced":true,
            "version":1
         }
      ],
      "version":1
   },
   {
      "activityId":"46aa19a1-5e0f-4dbf-a0bc-e7bcef46a703",
      "lmsActivityIdentifier":"27292852",
      "name":"Session1",
      "totalPoints":1.0,
      "lmsUserGrades":[
         {
            "userId":"4ed71a4f-6ae1-4218-b122-f4e9eeefc03f",
            "lmsUserIdentifier":"9991863",
            "totalPoints":1.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"1cee27a4-91e3-4975-a1d8-b31ece79db10",
            "lmsUserIdentifier":"9991865",
            "totalPoints":0.0,
            "synced":true,
            "version":1
         },
         {
            "userId":"a8fcb57a-0f59-4104-a18d-d185eb003c0c",
            "lmsUserIdentifier":"9991862",
            "totalPoints":1.0,
            "synced":true,
            "version":1
         },
         {
            "userId":"54400abe-b25d-45fe-b77c-e1a0b90f0c86",
            "lmsUserIdentifier":"9991864",
            "totalPoints":0.5,
            "synced":true,
            "version":1
         },
         {
            "userId":"05afc973-37fe-4b6c-84ac-26b8c8255988",
            "lmsUserIdentifier":"9991861",
            "totalPoints":0.0,
            "synced":true,
            "version":1
         }
      ],
      "version":1
   },
   {
      "activityId":"1f5b78b6-14df-4734-a57a-bcb84a774abf",
      "lmsActivityIdentifier":"27292849",
      "name":"Session2",
      "totalPoints":2.0,
      "lmsUserGrades":[
         {
            "userId":"4ed71a4f-6ae1-4218-b122-f4e9eeefc03f",
            "lmsUserIdentifier":"9991863",
            "totalPoints":0.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"1cee27a4-91e3-4975-a1d8-b31ece79db10",
            "lmsUserIdentifier":"9991865",
            "totalPoints":2.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"05afc973-37fe-4b6c-84ac-26b8c8255988",
            "lmsUserIdentifier":"9991861",
            "totalPoints":35.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"a8fcb57a-0f59-4104-a18d-d185eb003c0c",
            "lmsUserIdentifier":"9991862",
            "totalPoints":0.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"54400abe-b25d-45fe-b77c-e1a0b90f0c86",
            "lmsUserIdentifier":"9991864",
            "totalPoints":1.0,
            "synced":false,
            "version":1
         }
      ],
      "version":1
   },
   {
      "activityId":"e5d541e6-d373-44c3-a665-15337026bd0e",
      "lmsActivityIdentifier":"27292850",
      "name":"Session3",
      "totalPoints":10.0,
      "lmsUserGrades":[
         {
            "userId":"4ed71a4f-6ae1-4218-b122-f4e9eeefc03f",
            "lmsUserIdentifier":"9991863",
            "totalPoints":8.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"1cee27a4-91e3-4975-a1d8-b31ece79db10",
            "lmsUserIdentifier":"9991865",
            "totalPoints":8.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"a8fcb57a-0f59-4104-a18d-d185eb003c0c",
            "lmsUserIdentifier":"9991862",
            "totalPoints":5.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"54400abe-b25d-45fe-b77c-e1a0b90f0c86",
            "lmsUserIdentifier":"9991864",
            "totalPoints":4.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"05afc973-37fe-4b6c-84ac-26b8c8255988",
            "lmsUserIdentifier":"9991861",
            "totalPoints":8.0,
            "synced":false,
            "version":1
         }
      ],
      "version":1
   },
   {
      "activityId":"a9d09f86-d74c-4868-a2cf-ec80584cfba7",
      "lmsActivityIdentifier":"27292848",
      "name":"Session4",
      "totalPoints":3.0,
      "lmsUserGrades":[
         {
            "userId":"4ed71a4f-6ae1-4218-b122-f4e9eeefc03f",
            "lmsUserIdentifier":"9991863",
            "totalPoints":1.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"1cee27a4-91e3-4975-a1d8-b31ece79db10",
            "lmsUserIdentifier":"9991865",
            "totalPoints":2.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"a8fcb57a-0f59-4104-a18d-d185eb003c0c",
            "lmsUserIdentifier":"9991862",
            "totalPoints":1.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"54400abe-b25d-45fe-b77c-e1a0b90f0c86",
            "lmsUserIdentifier":"9991864",
            "totalPoints":2.0,
            "synced":false,
            "version":1
         },
         {
            "userId":"05afc973-37fe-4b6c-84ac-26b8c8255988",
            "lmsUserIdentifier":"9991861",
            "totalPoints":2.0,
            "synced":false,
            "version":1
         }
      ],
      "version":1
   }
];

console.log(countSynced(data));

    let users = new Map()
    
    for (const activity in activities) {
      for (const grades in activity.lmsUserGrades) {
         // You mentioned false should overwrite for users with true values
      if (users.has(grade.userId) && grade.synced === false) {
        users.set(grade.userId, false)
      } else { 
            users.set(grade.userId, grade.synced)
     }
    }
    
    let syncedUsers = 0
    let unSyncedUsers = 0
    for (let synced of users.values()){
    synced ? syncedUsers++ : unSyncedUsers++
}