void _OnRawCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
// If an item got added, was it something we care to see?
Assert.AreEqual(1, e.NewItems.Count);
var newPost = (ActivityPost)e.NewItems[0];
if (_IsInteresting(newPost.Actor))
{
_filteredCollection.Add(newPost);
_interestMap[newPost.Actor] = true;
}
break;
case NotifyCollectionChangedAction.Move:
_filteredCollection.RefreshSort();
break;
case NotifyCollectionChangedAction.Remove:
// If an item got removed, was it one we were really showing?
Assert.AreEqual(1, e.OldItems.Count);
var oldPost = (ActivityPost)e.OldItems[0];
if (_IsInteresting(oldPost.Actor))
{
if (_filteredCollection.Remove(oldPost))
{
if (!_filteredCollection.Any(post => post.Actor.UserId == oldPost.Actor.UserId))
{
oldPost.Actor.PropertyChanged -= _OnContactPropertyChanged;
_interestMap.Remove(oldPost.Actor);
}
}
}
break;
case NotifyCollectionChangedAction.Replace:
// Unsupported
Assert.Fail();
break;
case NotifyCollectionChangedAction.Reset:
foreach (var contact in _interestMap.Keys)
{
contact.PropertyChanged -= _OnContactPropertyChanged;
}
_interestMap.Clear();
_filteredCollection.Clear();
break;
}
}
void IMergeable <FacebookObjectId, ActivityPost> .Merge(ActivityPost other)
{
Verify.IsNotNull(other, "other");
Verify.AreEqual(PostId, other.PostId, "other", "Can't merge two ActivityPosts with different Ids.");
if (object.ReferenceEquals(this, other))
{
return;
}
Assert.AreEqual(ActorUserId, other.ActorUserId);
//ActorUserId = other.ActorUserId;
Assert.AreEqual(TargetUserId, other.TargetUserId);
//TargetUserId = other.TargetUserId;
Attachment = other.Attachment;
CanComment = other.CanComment;
CanLike = other.CanLike;
CanRemoveComments = other.CanRemoveComments;
CommentCount = other.CommentCount;
Created = other.Created;
HasLiked = other.HasLiked;
LikedCount = other.LikedCount;
LikeUri = other.LikeUri;
Message = other.Message;
RawComments.Merge(other.RawComments, false);
if (_hasGottenMoreComments)
{
GetMoreComments();
}
else
{
_NotifyPropertyChanged("HasMoreComments");
}
if (other._mergeableLikers != null && other._mergeableLikers.Count != 0)
{
if (this._mergeableLikers == null)
{
_mergeableLikers = new FBMergeableCollection <FacebookContact>(false);
}
_mergeableLikers.Merge(other._mergeableLikers, false);
}
else if (_mergeableLikers != null)
{
_mergeableLikers.Clear();
}
Updated = other.Updated;
}