public static async Task<StatusModel> Get(TwitterStatus status)
{
status = await StatusStore.Get(status.Id)
.DefaultIfEmpty(status)
.FirstAsync();
var rto = status.RetweetedOriginal == null
? null
: await Get(status.RetweetedOriginal);
var lockerobj = _generateLock.GetOrAdd(status.Id, new object());
try
{
lock (lockerobj)
{
StatusModel model;
WeakReference wr;
lock (_staticCacheLock)
{
_staticCache.TryGetValue(status.Id, out wr);
}
if (wr != null)
{
model = (StatusModel)wr.Target;
if (model != null)
{
return model;
}
}
// cache is dead/not cached yet
model = new StatusModel(status, rto);
wr = new WeakReference(model);
lock (_staticCacheLock)
{
_staticCache[status.Id] = wr;
}
return model;
}
}
finally
{
_generateLock.TryRemove(status.Id, out lockerobj);
// ReSharper disable InvertIf
#pragma warning disable 4014
if (Interlocked.Increment(ref _cleanupCount) == CleanupInterval)
{
Interlocked.Exchange(ref _cleanupCount, 0);
Task.Run((Action)CollectGarbages);
}
#pragma warning restore 4014
// ReSharper restore InvertIf
}
}
private StatusModel(TwitterStatus status, StatusModel retweetedOriginal)
: this(status)
{
this.RetweetedOriginal = retweetedOriginal;
}
protected StatusViewModel GenerateStatusViewModel(StatusModel status)
{
return new StatusViewModel(this, status, CurrentAccounts);
}
public static StatusModel Get(TwitterStatus status)
{
object lockerobj = _generateLock.GetOrAdd(status.Id, new object());
try
{
lock (lockerobj)
{
StatusModel model;
WeakReference wr;
lock (_staticCacheLock)
{
_staticCache.TryGetValue(status.Id, out wr);
}
if (wr != null)
{
model = (StatusModel)wr.Target;
if (model != null)
return model;
}
// cache is dead/not cached yet
model = new StatusModel(status);
wr = new WeakReference(model);
lock (_staticCacheLock)
{
_staticCache[status.Id] = wr;
}
return model;
}
}
finally
{
_generateLock.TryRemove(status.Id, out lockerobj);
var cc = Interlocked.Increment(ref _cleanupCount);
if (cc == CleanupInterval)
{
Interlocked.Exchange(ref _cleanupCount, 0);
Task.Run((Action)CollectGarbages);
}
}
}
public StatusViewModel(TimelineViewModelBase parent, StatusModel status,
IEnumerable<long> initialBoundAccounts)
{
_parent = parent;
// get status model
Model = status;
RetweetedOriginalModel = status.RetweetedOriginal;
// bind accounts
_bindingAccounts = initialBoundAccounts.Guard().ToArray();
// initialize users information
_favoritedUsers = ViewModelHelperRx.CreateReadOnlyDispatcherCollectionRx(
Model.FavoritedUsers, user => new UserViewModel(user), DispatcherHelper.UIDispatcher);
CompositeDisposable.Add(_favoritedUsers);
CompositeDisposable.Add(
_favoritedUsers.ListenCollectionChanged()
.Subscribe(_ =>
{
RaisePropertyChanged(() => IsFavorited);
RaisePropertyChanged(() => IsFavoritedUserExists);
RaisePropertyChanged(() => FavoriteCount);
}));
_retweetedUsers = ViewModelHelperRx.CreateReadOnlyDispatcherCollectionRx(
Model.RetweetedUsers, user => new UserViewModel(user), DispatcherHelper.UIDispatcher);
CompositeDisposable.Add(_retweetedUsers);
CompositeDisposable.Add(
_retweetedUsers.ListenCollectionChanged()
.Subscribe(_ =>
{
RaisePropertyChanged(() => IsRetweeted);
RaisePropertyChanged(() => IsRetweetedUserExists);
RaisePropertyChanged(() => RetweetCount);
}));
if (RetweetedOriginalModel != null)
{
CompositeDisposable.Add(
RetweetedOriginalModel.FavoritedUsers.ListenCollectionChanged()
.Subscribe(_ => this.RaisePropertyChanged(() => IsFavorited)));
CompositeDisposable.Add(
RetweetedOriginalModel.RetweetedUsers.ListenCollectionChanged()
.Subscribe(_ => this.RaisePropertyChanged(() => IsRetweeted)));
}
// resolve images
var imgsubj = Model.ImagesSubject;
if (imgsubj != null)
{
lock (imgsubj)
{
var subscribe = imgsubj
.Finally(() =>
{
RaisePropertyChanged(() => Images);
RaisePropertyChanged(() => FirstImage);
RaisePropertyChanged(() => IsImageAvailable);
})
.Subscribe();
CompositeDisposable.Add(subscribe);
}
}
// look-up in-reply-to
if (!status.Status.InReplyToStatusId.HasValue) return;
var inReplyTo = StoreHelper.GetTweet(status.Status.InReplyToStatusId.Value)
.Subscribe(replyTo =>
{
this._inReplyTo = replyTo;
this.RaisePropertyChanged(() => this.IsInReplyToExists);
this.RaisePropertyChanged(() => this.InReplyToUserImage);
this.RaisePropertyChanged(() => this.InReplyToUserName);
this.RaisePropertyChanged(() => this.InReplyToUserScreenName);
this.RaisePropertyChanged(() => this.InReplyToBody);
});
this.CompositeDisposable.Add(inReplyTo);
}
public StatusViewModel(StatusModel status)
: this(null, status, null)
{
}
public StatusViewModel(TimelineViewModelBase parent, StatusModel status,
IEnumerable<long> initialBoundAccounts)
{
Interlocked.Increment(ref _instanceCount);
CompositeDisposable.Add(() => Interlocked.Decrement(ref _instanceCount));
_parent = parent;
// get status model
Model = status;
RetweetedOriginalModel = status.RetweetedOriginal;
// bind accounts
_bindingAccounts = initialBoundAccounts.Guard().ToArray();
// initialize users information
_favoritedUsers = ViewModelHelperRx.CreateReadOnlyDispatcherCollectionRx(
Model.FavoritedUsers, user => new UserViewModel(user),
DispatcherHelper.UIDispatcher, DispatcherPriority.Background);
CompositeDisposable.Add(_favoritedUsers);
CompositeDisposable.Add(
_favoritedUsers.ListenCollectionChanged()
.Subscribe(_ =>
{
RaisePropertyChanged(() => IsFavorited);
RaisePropertyChanged(() => IsFavoritedUserExists);
RaisePropertyChanged(() => FavoriteCount);
}));
_retweetedUsers = ViewModelHelperRx.CreateReadOnlyDispatcherCollectionRx(
Model.RetweetedUsers, user => new UserViewModel(user),
DispatcherHelper.UIDispatcher, DispatcherPriority.Background);
CompositeDisposable.Add(_retweetedUsers);
CompositeDisposable.Add(
_retweetedUsers.ListenCollectionChanged()
.Subscribe(_ =>
{
RaisePropertyChanged(() => IsRetweeted);
RaisePropertyChanged(() => IsRetweetedUserExists);
RaisePropertyChanged(() => RetweetCount);
}));
if (RetweetedOriginalModel != null)
{
CompositeDisposable.Add(
RetweetedOriginalModel.FavoritedUsers.ListenCollectionChanged()
.Subscribe(_ => this.RaisePropertyChanged(() => IsFavorited)));
CompositeDisposable.Add(
RetweetedOriginalModel.RetweetedUsers.ListenCollectionChanged()
.Subscribe(_ => this.RaisePropertyChanged(() => IsRetweeted)));
}
// resolve images
var imgsubj = Model.ImagesSubject;
if (imgsubj != null)
{
lock (imgsubj)
{
var subscribe = imgsubj
.Finally(() =>
{
RaisePropertyChanged(() => Images);
RaisePropertyChanged(() => FirstImage);
RaisePropertyChanged(() => IsImageAvailable);
})
.Subscribe();
CompositeDisposable.Add(subscribe);
}
}
// look-up in-reply-to
_isInReplyToExists = status.Status.InReplyToStatusId.HasValue;
}
