/// <summary>
/// Try to find the next age for a given age. Return false if there is no next age
/// (in which case, the Hybrasyl year simply increments without end)
/// </summary>
/// <param name="age"></param>
/// <param name="nextAge"></param>
/// <returns></returns>
public bool TryGetNextAge(HybrasylAge age, out HybrasylAge nextAge)
{
nextAge = null;
if (Ages.Count == 1)
{
return(false);
}
// Find the age of the day after the start date. This (again) assumes the
// user hasn't done something doltish like having non-contiguous ages
var after = age.StartDate + new TimeSpan(1, 0, 0, 0);
nextAge = Ages.FirstOrDefault(a => a.DateInAge(after));
return(nextAge != null);
}
/// <summary>
/// Try to find the previous age for a given age. Return false if there is no previous age
/// (in which case, a Hybrasyl date before the beginning of the age is simply a negative year)
/// </summary>
/// <param name="age"></param>
/// <param name="previousAge"></param>
/// <returns></returns>
public bool TryGetPreviousAge(HybrasylAge age, out HybrasylAge previousAge)
{
previousAge = null;
if (Ages.Count == 1)
{
return(false);
}
// Find the age of the day before the start date. This assumes the
// user hasn't done something doltish like having non-contiguous ages
var before = age.StartDate - new TimeSpan(1, 0, 0, 0);
previousAge = Ages.FirstOrDefault(a => a.DateInAge(before));
return(previousAge != null);
}