/// <summary>
/// Determines whether a level is unlocked for a user by evaluating the level preconditions against that user.
/// </summary>
/// <param name="level">The level.</param>
/// <param name="userId">The user.</param>
/// <returns><c>true</c> if [is level unlocked for user] [the specified level]; otherwise, <c>false</c>.</returns>
public bool IsLevelUnlockedForUser(IPreconditionXml level, string userId)
{
try
{
var preconditionXml = level.Precondition ?? string.Empty;
var specification = new SingleUserWithBadges(userId);
var maybeUser = unitOfWork.Users.GetMaybe(specification);
if (maybeUser.None)
{
return(false);
}
if (string.IsNullOrWhiteSpace(preconditionXml))
{
return(true); // No rules = unlocked
}
var parser = new LevelPreconditionParser();
var rules = parser.ParsePreconditionXml(preconditionXml);
return(rules.Evaluate(maybeUser.Single()));
}
catch (Exception e)
{
Log.Error(e, $"Error while evaluating level access for user {userId}", level);
return(false);
}
}
