private void Notify(List <ChangeDetails> changes)
{
// Inspect the changes and push update notifications to generated groups
foreach (var change in changes)
{
var notificationGroups = _notificationGroupManager.GetGroupsForEntity(change.Entity.GetType());
foreach (var group in notificationGroups)
{
var groupProperties = change.Properties.Where(c => group.PropertyNames.Contains(c.PropertyName));
if (change.EntityState == EntityState.Added ||
change.EntityState == EntityState.Modified && groupProperties.Any(p => p.IsChanged))
{
// Notify the group for the current set this entity was added to
var groupName = group.GetGroupName(groupProperties.Select(p => p.CurrentValue));
var notification = ChangeNotification.Create(
ChangeType.Added,
change);
Debug.WriteLine("Change notification: A {0} with key {1} was added to notification group {2}", change.Entity.GetType().Name, String.Join(",", change.EntityKey.EntityKeyValues.Select(k => k.Value)), groupName);
OnChange(groupName, notification);
if (change.EntityState == EntityState.Modified)
{
// Notify the group for the original set this entity was removed from
groupName = group.GetGroupName(groupProperties.Select(p => p.OriginalValue));
notification = ChangeNotification.Create(
ChangeType.Deleted,
change);
Debug.WriteLine("Change notification: A {0} with key {1} was removed from notification group {2}", change.Entity.GetType().Name, String.Join(",", change.EntityKey.EntityKeyValues.Select(k => k.Value)), groupName);
OnChange(groupName, notification);
}
}
else
{
// No notication group properties changed or the entity was deleted so just tell the current set group that an entity changed
var groupName = group.GetGroupName(groupProperties.Select(p => p.CurrentValue));
var notification = ChangeNotification.Create(
change.EntityState,
change);
Debug.WriteLine("Change notification: A {0} with key {1} was changed in notification group {2}", change.Entity.GetType().Name, String.Join(",", change.EntityKey.EntityKeyValues.Select(k => k.Value)), groupName);
OnChange(groupName, notification);
}
}
}
}
protected abstract void OnChange(string groupName, ChangeNotification change);