protected override void BeforeSave()
{
DateTime timestamp = DateTime.UtcNow;
//find all changed enities
var modifiedEntities = Context.ChangeTracker.Entries<CurveDetail>()
.Where(p => p.State == EntityState.Modified)
.Select(p => p.Entity);
foreach (CurveDetail detail in modifiedEntities)
{
//main entity, for which we keep versioning
var mainEntity = detail.Curve;
ICollection<CurveDetail> mainEntityDetails = mainEntity.CurveDetails;
if (detail.Status == EntityStatus.ExpiredInSession)
{
foreach (CurveDetail item in mainEntityDetails)
{
if (detail.CurveDetailID != item.CurveDetailID)
{
item.EndTime = detail.EndTime;
item.ModifiedBy = detail.ModifiedBy;
item.ModifiedAt = detail.ModifiedAt;
}
}
mainEntity.EndTime = detail.EndTime;
mainEntity.ModifiedBy = detail.ModifiedBy;
mainEntity.ModifiedAt = detail.ModifiedAt;
}
if (detail.Status == EntityStatus.ApprovedInSession)
{
//entity has been approved
//mark existing details as expired
foreach (CurveDetail item in mainEntityDetails)
{
if (detail.CurveDetailID != item.CurveDetailID)
{
item.Latest = false;
item.EndTime = (DateTime)detail.ApprovedAt;
detail.StartTime = (DateTime)detail.ApprovedAt;
}
}
//check if main entity is approved - if not copy details
if (mainEntity.Status != EntityStatus.Approved)
{
mainEntity.ApprovedAt = detail.ApprovedAt;
mainEntity.ApprovedBy = detail.ApprovedBy;
mainEntity.StartTime = detail.StartTime;
}
// approve all consituents
foreach (var dim in mainEntity.CurveDimensions)
{
foreach (var item in dim.CurveConstituents)
{
if (item.Status != EntityStatus.Unapproved || item.Status != EntityStatus.UnapprovedInSession)
{
item.ApprovedAt = detail.ApprovedAt;
item.ApprovedBy = detail.ApprovedBy;
item.StartTime = detail.StartTime;
}
}
}
}
else if (detail.Status == EntityStatus.UnapprovedInSession)
{
//new version of the entity
//we are creating a copy of currently edited entity
//and add it back to context
var copy = new CurveDetail();
mainEntity.CurveDetails.Add(copy);
//copy values from original
Context.Entry(copy).CurrentValues.SetValues(detail);
//reset auditing
copy.ResetCopy();
//revert the changes - done implicitly
Context.Entry(detail).State = EntityState.Unchanged;
//remove latest flag
detail.Latest = false;
}
}
}
