ln.http/ln.http/HttpPrincipal.cs

using System.Collections.Generic;
using System.Text;
using ln.http.router;

namespace ln.http
{
    public class HttpPrincipal
    {
        public string UniqueId { get; set; }
        public string Username { get; set; }
        
        public HttpPrincipal AuthenticatedPrincipal { get; set; }

        private Dictionary<string, HttpAccessRights> permissions = new Dictionary<string, HttpAccessRights>();
        public IEnumerable<KeyValuePair<string, HttpAccessRights>> Permissions => permissions;

        public void AddPermission(string roleName, HttpAccessRights accessRights)
        {
            if (permissions.TryGetValue(roleName, out HttpAccessRights roleAccessFlags))
            {
                roleAccessFlags |= accessRights;
                permissions[roleName] = roleAccessFlags;
            }
            else
            {
                permissions.Add(roleName, accessRights);
            }
        }
        public void RemovePermission(string roleName, HttpAccessRights accessRights)
        {
            if (permissions.TryGetValue(roleName, out HttpAccessRights roleAccessFlags))
            {
                roleAccessFlags &= ~accessRights;
                permissions[roleName] = roleAccessFlags;
            }
        }
        public bool HasPermission(string roleName, HttpAccessRights accessRights) =>
            permissions.TryGetValue(roleName, out HttpAccessRights roleAccessFlags) &&
            ((roleAccessFlags & accessRights) == accessRights);

        public override string ToString()
        {
            if (AuthenticatedPrincipal is null)
                return string.Format("{0}[{1}]", Username, UniqueId);
            else
                return string.Format("{2}=>{0}[{1}]", Username, UniqueId, AuthenticatedPrincipal.ToString());
        }
    }
}