最简实例演示asp.net5中用户认证和授权(2)

上接最简实例演示asp.net5中用户认证和授权(1)

基础类建立好后，下一步就要创建对基础类进行操作的类了，也就是实现基础类的增删改查（听起来不太高大上），当然，为了使用asp.net5的认证机制，这些都是通过特定的接口来实现的。

比如，对于角色来说，角色管理要实现的接口如下：

    public interface IQueryableRoleStore<TRole> : IRoleStore<TRole>, IDisposable where TRole : class
    {

        IQueryable<TRole> Roles { get; }
    }

    public interface IRoleStore<TRole> : IDisposable where TRole : class
    {

        Task<IdentityResult> CreateAsync(TRole role, CancellationToken cancellationToken);
        Task<IdentityResult> DeleteAsync(TRole role, CancellationToken cancellationToken);
        Task<TRole> FindByIdAsync(string roleId, CancellationToken cancellationToken);
        Task<TRole> FindByNameAsync(string normalizedRoleName, CancellationToken cancellationToken);
        Task<string> GetNormalizedRoleNameAsync(TRole role, CancellationToken cancellationToken);
        Task<string> GetRoleIdAsync(TRole role, CancellationToken cancellationToken);
        Task<string> GetRoleNameAsync(TRole role, CancellationToken cancellationToken);
        Task SetNormalizedRoleNameAsync(TRole role, string normalizedName, CancellationToken cancellationToken);
        Task SetRoleNameAsync(TRole role, string roleName, CancellationToken cancellationToken);
       Task<IdentityResult> UpdateAsync(TRole role, CancellationToken cancellationToken);
    }

其实，也没什么复杂，一个是获得所有预定义角色的列表，另一个是关于角色的增删改查而已,代码如下：

public class HDRoleStore<TRole> : IQueryableRoleStore<TRole>
        where TRole : HDRole, new()
    {
        /// <summary>
        /// 存储所有预定义的角色
        /// </summary>
        private readonly Dictionary<string, TRole> _roles = new Dictionary<string, TRole>();

        /// <summary>
        /// 所有角色
        /// </summary>
        public IQueryable<TRole> Roles
        {
            get
            {
                if (_roles.Count == 0)
                {
                    TRole role = new TRole();
                    role.Id = "admin";
                    role.Name = "管理员";
                    _roles.Add(role.Id, role);

                    role = new TRole();
                    role.Id = "user";
                    role.Name = "用户";
                    _roles.Add(role.Id, role);

                    role = new TRole();
                    role.Id = "power";
                    role.Name = "大虾";
                    _roles.Add(role.Id, role);
                }
                return _roles.Values.AsQueryable();
            }
        }

        public Task<IdentityResult> CreateAsync(TRole role, CancellationToken cancellationToken)
        {
            _roles[role.Id] = role;
            return Task.FromResult(IdentityResult.Success);
        }

        public Task<IdentityResult> DeleteAsync(TRole role, CancellationToken cancellationToken)
        {
            if (role == null || !_roles.ContainsKey(role.Id))
            {
                throw new InvalidOperationException("Unknown role");
            }
            _roles.Remove(role.Id);
            return Task.FromResult(IdentityResult.Success);
        }

        public void Dispose()
        {
           
        }

        public Task<TRole> FindByIdAsync(string roleId, CancellationToken cancellationToken)
        {
            if (_roles.ContainsKey(roleId))
            {
                return Task.FromResult(_roles[roleId]);
            }
            return Task.FromResult<TRole>(null);
        }

        public Task<TRole> FindByNameAsync(string normalizedRoleName, CancellationToken cancellationToken)
        {
            return
                 Task.FromResult(
                     Roles.SingleOrDefault(r => String.Equals(r.Name, normalizedRoleName, StringComparison.OrdinalIgnoreCase)));
        }

        public Task<string> GetNormalizedRoleNameAsync(TRole role, CancellationToken cancellationToken)
        {
            return Task.FromResult(role.Name);
        }

        public Task<string> GetRoleIdAsync(TRole role, CancellationToken cancellationToken)
        {
            return Task.FromResult(role.Id);
        }

        public Task<string> GetRoleNameAsync(TRole role, CancellationToken cancellationToken)
        {
            return Task.FromResult(role.Name);
        }

        public Task SetNormalizedRoleNameAsync(TRole role, string normalizedName, CancellationToken cancellationToken)
        {
            role.Name = normalizedName;
            return Task.FromResult(0);
        }

        public Task SetRoleNameAsync(TRole role, string roleName, CancellationToken cancellationToken)
        {
            role.Name = roleName;
            return Task.FromResult(0);
        }

        public Task<IdentityResult> UpdateAsync(TRole role, CancellationToken cancellationToken)
        {
            _roles[role.Id] = role;
            return Task.FromResult(IdentityResult.Success);
        }
    }

可以看到，在第12行，我们的方法里直接写死了角色列表，如果相结合具体的项目的话，我相信叶良辰有一百种方法从各种数据库、配置文件等取得角色列表，而其他程序代码却基本不用更改。

当然，asp.net5自带的默认实现实现了很多其他接口，这里为了最简单起见，只实现了最基本的。

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最简实例演示asp.net5中用户认证和授权(3)