public Role AddRole(string roleName)
{
Role role = new Role()
{
Name = roleName
};
return AddRole(role);
}
public Role AddRole(Role role)
{
if (RoleExists(role))
throw new ArgumentException(TooManyRole);
return entities.Roles.Add(role);
}
public IQueryable<User> GetUsersForRole(Role role)
{
if (!RoleExists(role))
throw new ArgumentException(MissingRole);
return from user in entities.Users
where user.RoleId == role.RoleId
orderby user.UserName
select user;
}
public bool RoleExists(Role role)
{
if (role == null) return false;
return (entities.Roles.SingleOrDefault(r => r.RoleId == role.RoleId || r.Name == role.Name) != null);
}
public Role DeleteRole(Role role)
{
if (!RoleExists(role))
throw new ArgumentException(MissingRole);
if (GetUsersForRole(role).Count() > 0)
throw new ArgumentException(AssignedRole);
return entities.Roles.Remove(role);
}