266 lines
10 KiB
C#
266 lines
10 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Globalization;
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using System.Text;
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namespace DatabaseExport
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{
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/// <summary>
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/// this class encapsulates a single user
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/// </summary>
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public class User : TagAwareBase
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{
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public enum DefaultRoles
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{
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Administrator = 0,
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PowerUser = 1,
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User = 2,
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Guest = 3
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}
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public enum UserPermissionLevels
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{
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Deny = 0,
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Read = 1,
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ReadAndExecute = 2,
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Edit = 3,
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Admin = 4
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}
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public enum Tags
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{
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User,
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Role,
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Version,
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LastModified,
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LastModifiedBy,
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Name,
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UserName,
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Password,
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LocalOnly,
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Permissions,
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Visibility,
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Id
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}
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public enum XmlFields
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{
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ID,
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UserName,
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DisplayName,
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Password,
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// ReSharper disable once InconsistentNaming
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IUIItemPermissions,
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// ReSharper disable once InconsistentNaming
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IUIItemVisibility,
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Role,
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LastModified,
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LastModifiedBy,
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Version,
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LocalOnly,
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UserTags
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}
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private const string DEFAULT_LAST_MODIFIED_BY = "---";
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private const string DEFAULT_ADMIN_USERNAME = "Admin";
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private const string DEFAULT_GUEST_USERNAME = "Guest";
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private const string DEFAULT_POWERUSER_USERNAME = "PowerUser";
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private const string DEFAULT_USER_USERNAME = "User";
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private const int INVALID_ID = -1;
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/// <summary>
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/// a default user is a user with one of the default roles and names, like Admin or Guest
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/// return true if is a default user
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/// </summary>
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public bool IsADefaultUser => UserName == GetDefaultUserName(Role);
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/// <summary>
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/// hash of password is seeded and stored in xml
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/// hash is seeded with computable information known about the user
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/// hash is base64encoding for xml niceness
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/// xml is encrypted prior to writing to file
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/// </summary>
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private string _password = "";
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/// <summary>
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/// the user friendly name for a user, a display name
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/// </summary>
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private string _name;
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public string Name
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{
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get => _name;
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set => SetProperty(ref _name, value, Tags.Name.ToString());
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}
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/// <summary>
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/// the user name for the user, a short unique name for the user
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/// </summary>
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private string _userName = string.Empty;
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public string UserName
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{
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get => _userName;
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set => SetProperty(ref _userName, value, Tags.UserName.ToString());
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}
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private int _id = INVALID_ID;
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public int Id
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{
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get => _id;
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set => SetProperty(ref _id, value, Tags.Id.ToString());
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}
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/// <summary>
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/// the default role for the user, if a permission is not explicitly set for the user
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/// it will use this default role to determine the effect permission
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/// </summary>
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private DefaultRoles _myRole = DefaultRoles.Guest;
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public DefaultRoles Role
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{
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get => _myRole;
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set
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{
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if (IsADefaultUser && _myRole != value) { throw new NotSupportedException(); }
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SetProperty(ref _myRole, value, Tags.Role.ToString());
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}
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}
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/// <summary>
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/// right now the version field is updated whenever the user is updated, so it keeps
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/// track of how many times it has been modified
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/// </summary>
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private int _version;
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public int Version
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{
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get => _version;
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set => SetProperty(ref _version, value, Tags.Version.ToString());
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}
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/// <summary>
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/// the time the user was last modified or commited to the db
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/// </summary>
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private DateTime _lastModified = DateTime.MinValue;
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public DateTime LastModified
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{
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get => _lastModified;
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set => SetProperty(ref _lastModified, value, Tags.LastModified.ToString());
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}
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/// <summary>
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/// the user that last modified the user
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/// </summary>
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private string _lastModifiedBy = DEFAULT_LAST_MODIFIED_BY;
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public string LastModifiedBy
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{
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get => _lastModifiedBy;
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set => SetProperty(ref _lastModifiedBy, value, Tags.LastModifiedBy.ToString());
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}
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/// <summary>
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/// a remnant of the multiple database era, this was to mark a user as being local to this db and should never
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/// be pushed to the central db
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/// </summary>
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private bool _bLocalOnly;
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public bool LocalOnly
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{
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get => _bLocalOnly;
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set => SetProperty(ref _bLocalOnly, value, Tags.LocalOnly.ToString());
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}
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/// <summary>
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/// lookup of permissions by UI item
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/// </summary>
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private readonly Dictionary<IUIItems, UserPermissionLevels> _tabPermissions = new Dictionary<IUIItems, UserPermissionLevels>();
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/// <summary>
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/// lookup of visibility by UI item
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/// </summary>
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private readonly Dictionary<IUIItems, bool> _showTabs = new Dictionary<IUIItems, bool>();
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/// <summary>
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/// lock for accessing tab permissions or visibility
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/// </summary>
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private static readonly object TabPermissionsLock = new object();
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// #endregion properties
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public override ConstraintHelper[] GetConstraints()
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{
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return new[]
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{
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new ConstraintHelper
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{
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ColumnName = DbOperations.Users.UserFields.UserName.ToString(),
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DbType = SqlDbType.NVarChar,
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DbValue = UserName
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}
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};
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}
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public override string LookupTable => DbOperations.Users.USERS_TABLE;
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public User(DataRow row)
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{
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Id = Convert.ToInt32(row[DbOperations.Users.UserFields.ID.ToString()]);
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UserName = (string)row[DbOperations.Users.UserFields.UserName.ToString()];
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Name = (string)row[DbOperations.Users.UserFields.DisplayName.ToString()];
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_password = (string)row[DbOperations.Users.UserFields.Password.ToString()];
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_myRole = (DefaultRoles)Convert.ToInt32(row[DbOperations.Users.UserFields.Role.ToString()]);
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LastModified = (DateTime)row[DbOperations.Users.UserFields.LastModified.ToString()];
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LastModifiedBy = (string)row[DbOperations.Users.UserFields.LastModifiedBy.ToString()];
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LocalOnly = Convert.ToBoolean(row[DbOperations.Users.UserFields.LocalOnly.ToString()]);
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}
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public string GetPermissionSerialized()
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{
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var sb = new StringBuilder();
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lock (TabPermissionsLock)
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{
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var i = _tabPermissions.GetEnumerator();
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while (i.MoveNext())
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{
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if (sb.Length > 0) { sb.Append(","); }
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sb.Append(i.Current.Key.GetName());
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sb.Append("=");
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sb.Append(((int)i.Current.Value).ToString());
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}
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}
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return sb.ToString();
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}
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public static string GetDefaultUserName(DefaultRoles role)
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{
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switch (role)
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{
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case DefaultRoles.Administrator:
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return DEFAULT_ADMIN_USERNAME;
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case DefaultRoles.Guest:
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return DEFAULT_GUEST_USERNAME;
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case DefaultRoles.PowerUser:
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return DEFAULT_POWERUSER_USERNAME;
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case DefaultRoles.User:
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return DEFAULT_USER_USERNAME;
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default:
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throw new NotSupportedException("Unknown role " + role);
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}
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}
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public string GetVisibilitySerialized()
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{
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var sb = new StringBuilder();
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var i2 = _showTabs.GetEnumerator();
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while (i2.MoveNext())
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{
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if (sb.Length > 0) { sb.Append(","); }
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sb.Append(i2.Current.Key.GetName());
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sb.Append("=");
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sb.Append(i2.Current.Value ? "1" : "0");
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}
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return sb.ToString();
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}
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public Dictionary<string, string> GetValues()
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{
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var elementNameValuePairs = new Dictionary<string, string>();
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elementNameValuePairs[XmlFields.ID.ToString()] = Id.ToString();
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elementNameValuePairs[XmlFields.UserName.ToString()] = UserName;
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elementNameValuePairs[XmlFields.DisplayName.ToString()] = Name;
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elementNameValuePairs[XmlFields.Password.ToString()] = _password;
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elementNameValuePairs[XmlFields.IUIItemPermissions.ToString()] = GetPermissionSerialized();
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elementNameValuePairs[XmlFields.IUIItemVisibility.ToString()] = GetVisibilitySerialized();
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elementNameValuePairs[XmlFields.Role.ToString()] = Role.ToString();
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elementNameValuePairs[XmlFields.LastModified.ToString()] = LastModified.ToString(CultureInfo.InvariantCulture);
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elementNameValuePairs[XmlFields.LastModifiedBy.ToString()] = LastModifiedBy;
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elementNameValuePairs[XmlFields.Version.ToString()] = Version.ToString(CultureInfo.InvariantCulture);
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elementNameValuePairs[XmlFields.LocalOnly.ToString()] = LocalOnly.ToString(CultureInfo.InvariantCulture);
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elementNameValuePairs[XmlFields.UserTags.ToString()] = GetTagsCommaSeperatedString();
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return elementNameValuePairs;
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}
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}
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}
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