public RiskTuple TryFindRemovableRisk(Risk risk, DateTime validTill)
{
return(_InsuredRisks
.Where(it => !it.Item2.HasValue)
.Where(it => it.Item1 <= validTill)
.FirstOrDefault());
}
private ImmutablePolicy CheckIfPolicyExistsFor(string nameOfInsuredObject, Risk risk,
DateTime dateTime, bool endAllowed)
{
if (!_AvailableRisks.Contains(risk))
{
throw new RiskNotFoundException($"The risk '{risk.Name}' is not available");
}
if (dateTime < _DateTimeProvider())
{
throw new PolicyDateException("Cannot add/remove a risk that starts/ends in the past");
}
var policy = GetImmutablePolicy(nameOfInsuredObject, dateTime, endAllowed);
if (policy == null)
{
throw new PolicyNotFoundException();
}
if (dateTime < policy.ValidFrom ||
((endAllowed && dateTime > policy.ValidTill) || (!endAllowed && dateTime > policy.ValidTill)))
{
throw new PolicyDateException("The provided date does not fall into policies' duration time range.");
}
return(policy);
}
public void RemoveRisk(string nameOfInsuredObject, Risk risk, DateTime validTill)
{
var policy = CheckIfPolicyExistsFor(nameOfInsuredObject, risk, validTill, true);
var openRisk = policy.TryFindRemovableRisk(risk, validTill);
if (openRisk == null)
{
throw new RiskNotFoundException($"Can't find a risk that is open and starts before {validTill}");
}
var newPolicy = policy.Clone(risks => risks.Select(oldRisk => (oldRisk == openRisk)
? Tuple.Create(oldRisk.Item1, new DateTime?(validTill), oldRisk.Item3) : oldRisk).ToList());
_Policies.Remove(policy);
_Policies.Add(newPolicy);
}
public void AddRisk(string nameOfInsuredObject, Risk risk, DateTime validFrom)
{
var policy = CheckIfPolicyExistsFor(nameOfInsuredObject, risk, validFrom, false);
if (policy.HasRiskLaterThan(risk, validFrom))
{
throw new PolicyDateException("Cannot add this risk - policy has another unclosed risk or " +
"this risk comes before the latest risk in the policy.");
}
var newPolicy = policy.Clone(risks =>
{
var newRisks = new List <RiskTuple>(risks);
newRisks.Add(Tuple.Create(validFrom, new DateTime?(), risk));
return(newRisks);
});
_Policies.Remove(policy);
_Policies.Add(newPolicy);
}
public bool HasRiskLaterThan(Risk risk, DateTime validFrom)
{
return(_InsuredRisks.Any(it => it.Item3.Equals(risk) &&
(!it.Item2.HasValue || it.Item1 > validFrom || it.Item2 > validFrom)));
}