TeamMsgAckInfo.java

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package com.netease.nimlib.sdk.msg.model;

import com.netease.nimlib.util.CollectionUtil;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * 群已读回执信息
 * 此类有两种状态，一种是存储已读未读用户账号列表的状态，一种是存储已读未读人数的状态
 * 第一种状态下，ackCount和unAckCount为0
 * 第二种状态下ackAccountList和unAckAccountList都为null
 */
public class TeamMsgAckInfo {
    private String teamId;
    private String msgId;
    /** 新已读用户的账号 */
    private String newReaderAccount;
    private int ackCount;
    private int unAckCount;
    private List<String> ackAccountList;
    private List<String> unAckAccountList;

    public TeamMsgAckInfo(String teamId, String msgId, int ackCount, int unAckCount) {
        this(teamId, msgId, ackCount, unAckCount, null);
    }

    public TeamMsgAckInfo(String teamId, String msgId, int ackCount, int unAckCount, String newReaderAccount) {
        this.teamId = teamId;
        this.msgId = msgId;
        this.ackCount = ackCount;
        this.unAckCount = unAckCount;
        this.newReaderAccount = newReaderAccount;
    }

    public TeamMsgAckInfo(String teamId, String msgId, List<String> ackAccountList, List<String> unAckAccountList) {
        this.teamId = teamId;
        this.msgId = msgId;
        this.ackAccountList = ackAccountList;
        this.unAckAccountList = unAckAccountList;
    }

    public String getTeamId() {
        return teamId;
    }

    public String getMsgId() {
        return msgId;
    }

    public int getAckCount() {
        if (ackAccountList != null) {
            return ackAccountList.size();
        }

        return ackCount;
    }

    public int getUnAckCount() {
        if (unAckAccountList != null) {
            return unAckAccountList.size();
        }

        return unAckCount;
    }

    public String getNewReaderAccount() {
        return newReaderAccount;
    }

    public List<String> getAckAccountList() {
        return ackAccountList;
    }

    public List<String> getUnAckAccountList() {
        return unAckAccountList;
    }

    /**
     * 生成一个新的实例，里面只包含指定用户的已读未读情况
     * 如果当前实例中不含用户列表，直接返回null
     *
     * @param accountSet 指定用户的账号列表
     * @return 新实例，如果当前实例中不含用户列表，直接返回null
     */
    public TeamMsgAckInfo newInstanceFromPartOfAccount(Set<String> accountSet) {
        // 不含有用户ID列表，直接返回null
        if (CollectionUtil.isEmpty(ackAccountList) && CollectionUtil.isEmpty(unAckAccountList)) {
            return null;
        }

        // 指定用户集为空，返回带空列表的示例
        if (CollectionUtil.isEmpty(accountSet)) {
            return new TeamMsgAckInfo(teamId, msgId, new ArrayList<>(0), new ArrayList<>(0));
        }

        List<String> chosenAckList = CollectionUtil.findAll(this.ackAccountList, accountSet::contains);
        List<String> chosenUnAckList = CollectionUtil.findAll(this.unAckAccountList, accountSet::contains);
        return new TeamMsgAckInfo(teamId, msgId, chosenAckList, chosenUnAckList);
    }
}