using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace LB_SmartVisionCommon
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{
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public class UserManager
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{
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private Dictionary<string, RecordUserData> _users;
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private readonly string _dataFilePath;
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private RecordUserData _currentUser;
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private static UserManager _instance;
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/// <summary>
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/// 线程锁
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/// </summary>
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private static readonly object _lock = new object();
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private UserManager(string dataFilePath = "users.json")
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{
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_dataFilePath = dataFilePath;
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_users = new Dictionary<string, RecordUserData>();
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_currentUser = null;
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LoadUsers();
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}
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public static UserManager Instance
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{
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get
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{
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// 双重检查锁定确保线程安全
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if (_instance == null)
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{
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lock (_lock)
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{
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if (_instance == null)
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{
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_instance = new UserManager();
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}
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}
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}
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return _instance;
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}
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}
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/// <summary>
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/// 当前登录用户
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/// </summary>
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public RecordUserData CurrentUser => _currentUser;
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/// <summary>
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/// 用户列表（只读）
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/// </summary>
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public Dictionary<string, RecordUserData> Users
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{
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get { return _users; }
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}
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/// <summary>
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/// 用户数量
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/// </summary>
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public int UserCount => _users.Count;
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/// <summary>
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/// 用户登录
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/// </summary>
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/// <param name="account">账户</param>
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/// <param name="password">密码</param>
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/// <returns></returns>
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public bool Login(string account, string password)
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{
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var user = _users.FirstOrDefault(u =>
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u.Value.EmployeeAccount == account && AESHelper.Decrypt(u.Value.EmployeePassword) == password);
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if (user.Value != null && user.Value != null)
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{
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_currentUser = user.Value;
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return true;
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}
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return false;
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}
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/// <summary>
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/// 用户登出
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/// </summary>
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public void Logout()
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{
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_currentUser = null;
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}
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/// <summary>
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/// 检查当前用户权限
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/// </summary>
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/// <param name="requireAdmin">是否是管理员？</param>
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/// <returns>返回权限</returns>
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private bool CheckPermission(bool requireAdmin = false)
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{
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if (_currentUser == null) return false;
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if (requireAdmin)
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return _currentUser.EmployeePermission == UserPermission.Administrator;
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return true;
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}
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/// <summary>
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/// 添加用户（需要管理员权限）
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/// </summary>
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/// <param name="user">RecordUserData user</param>
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/// <returns>是否添加成功！</returns>
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public bool AddUser(RecordUserData user)
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{
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if (_currentUser == null)
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{
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_currentUser = user;
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}
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if (!CheckPermission(true))
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{
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MessageBox.Show("需要管理员权限才能添加用户！", "权限不足", MessageBoxButtons.OK, MessageBoxIcon.Warning);
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return false;
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}
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if (_users.Any(u => u.Value.EmployeeNumber == user.EmployeeNumber ||
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u.Value.EmployeeAccount == user.EmployeeAccount))
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{
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MessageBox.Show("员工号或账号已存在！", "添加失败", MessageBoxButtons.OK, MessageBoxIcon.Warning);
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return false;
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}
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RecordUserData recordUserData = new RecordUserData();
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recordUserData.EmployeeNumber = user.EmployeeNumber;
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recordUserData.EmployeeAccount = user.EmployeeAccount;
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recordUserData.EmployeePassword = AESHelper.Encrypt(user.EmployeePassword);
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recordUserData.EmployeeName = user.EmployeeName;
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recordUserData.EmployeePermission = user.EmployeePermission;
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_users.Add(recordUserData.EmployeeNumber, recordUserData);
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SaveUsers();
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return true;
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}
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/// <summary>
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/// 删除用户（需要管理员权限）
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/// </summary>
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/// <param name="employeeNumber">string employeeNumber</param>
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/// <returns>是否删除成功</returns>
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public bool DeleteUser(string employeeNumber)
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{
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if (!CheckPermission(true))
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{
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MessageBox.Show("需要管理员权限才能删除用户！", "权限不足", MessageBoxButtons.OK, MessageBoxIcon.Warning);
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return false;
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}
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// 管理员不能删除自己
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if (_currentUser.EmployeeNumber == employeeNumber)
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{
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MessageBox.Show("不能删除当前登录的用户！", "删除失败", MessageBoxButtons.OK, MessageBoxIcon.Warning);
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return false;
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}
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var user = _users.FirstOrDefault(u => u.Value.EmployeeNumber == employeeNumber);
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if (user.Value != null)
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{
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_users.Remove(user.Key);
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SaveUsers();
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return true;
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}
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return false;
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}
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/// <summary>
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/// 更新用户信息
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/// </summary>
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/// <param name="updatedUser">RecordUserData updatedUser</param>
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/// <returns>是否更新成功</returns>
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public bool UpdateUser(RecordUserData updatedUser)
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{
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// 普通用户只能修改自己的信息，管理员可以修改所有用户信息
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bool canModify = _currentUser.EmployeePermission == UserPermission.Administrator ||
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_currentUser.EmployeeNumber == updatedUser.EmployeeNumber;
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if (!canModify)
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{
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MessageBox.Show("没有权限修改此用户信息！", "权限不足", MessageBoxButtons.OK, MessageBoxIcon.Warning);
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return false;
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}
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var existingUser = _users.FirstOrDefault(u => u.Value.EmployeeNumber == updatedUser.EmployeeNumber);
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if (existingUser.Value != null)
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{
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// 检查账号是否重复（排除自己）
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if (_users.Any(u => u.Value.EmployeeAccount == updatedUser.EmployeeAccount &&
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u.Value.EmployeeNumber != updatedUser.EmployeeNumber))
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{
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MessageBox.Show("账号已存在！", "更新失败", MessageBoxButtons.OK, MessageBoxIcon.Warning);
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return false;
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}
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// 更新用户信息
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existingUser.Value.EmployeeName = updatedUser.EmployeeName;
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existingUser.Value.EmployeeAccount = updatedUser.EmployeeAccount;
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existingUser.Value.EmployeePassword = AESHelper.Encrypt(updatedUser.EmployeePassword);
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// 只有管理员可以修改权限
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if (_currentUser.EmployeePermission == UserPermission.Administrator)
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{
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existingUser.Value.EmployeePermission = updatedUser.EmployeePermission;
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}
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SaveUsers();
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return true;
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}
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return false;
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}
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/// <summary>
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/// 根据员工号查询用户
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/// </summary>
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/// <param name="employeeNumber">string employeeNumber</param>
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/// <returns>RecordUserData</returns>
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public RecordUserData GetUserByNumber(string employeeNumber)
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{
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return _users.FirstOrDefault(u => u.Value.EmployeeNumber == employeeNumber).Value.Clone();
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}
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/// <summary>
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/// 根据账号查询用户
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/// </summary>
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/// <param name="account">string account</param>
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/// <returns>RecordUserData</returns>
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public RecordUserData GetUserByAccount(string account)
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{
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return _users.FirstOrDefault(u => u.Value.EmployeeAccount == account).Value.Clone();
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}
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/// <summary>
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/// 获取所有用户列表
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/// </summary>
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/// <returns>List<RecordUserData></returns>
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public List<RecordUserData> GetAllUsers()
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{
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return _users.Select(u => u.Value.Clone()).ToList();
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}
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/// <summary>
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/// 根据权限筛选用户
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/// </summary>
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/// <param name="permission">UserPermission permission</param>
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/// <returns>List<RecordUserData></returns>
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public List<RecordUserData> GetUsersByPermission(UserPermission permission)
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{
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return _users.Where(u => u.Value.EmployeePermission == permission)
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.Select(u => u.Value.Clone()).ToList();
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}
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/// <summary>
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/// 保存用户数据到JSON文件
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/// </summary>
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private void SaveUsers()
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{
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try
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{
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ConfigManager<Dictionary<string, RecordUserData>>.SaveConfig<Dictionary<string, RecordUserData>>(_users, _dataFilePath);
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}
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catch (Exception ex)
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{
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MessageBox.Show($"保存用户数据失败：{ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
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}
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}
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/// <summary>
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/// 从JSON文件加载用户数据
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/// </summary>
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private void LoadUsers()
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{
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try
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{
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if (File.Exists(_dataFilePath))
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{
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_users = ConfigManager<Dictionary<string, RecordUserData>>.LoadConfig<Dictionary<string, RecordUserData>>(_dataFilePath) ?? new Dictionary<string, RecordUserData>();
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}
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}
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catch (Exception ex)
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{
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MessageBox.Show($"加载用户数据失败：{ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
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_users = new Dictionary<string, RecordUserData>();
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}
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}
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/// <summary>
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/// 验证员工号是否唯一
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/// </summary>
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/// <param name="employeeNumber">string employeeNumber</param>
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/// <param name="excludeEmployeeNumber">string excludeEmployeeNumber = null</param>
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/// <returns>员工号是否唯一？</returns>
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public bool IsEmployeeNumberUnique(string employeeNumber, string excludeEmployeeNumber = null)
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{
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return !_users.Any(u => u.Value.EmployeeNumber == employeeNumber &&
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u.Value.EmployeeNumber != excludeEmployeeNumber);
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}
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/// <summary>
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/// 验证账号是否唯一
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/// </summary>
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/// <param name="account">string account</param>
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/// <param name="excludeEmployeeNumber">string excludeEmployeeNumber = null</param>
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/// <returns>账号是否唯一？</returns>
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public bool IsAccountUnique(string account, string excludeEmployeeNumber = null)
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{
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return !_users.Any(u => u.Value.EmployeeAccount == account &&
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u.Value.EmployeeNumber != excludeEmployeeNumber);
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}
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}
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}
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