public async Task ApplyTo(DataCollection collection, bool final = false)
{
foreach (var item in _removed.ToArray())
{
collection.RemoveFile(item.Model.Name);
}
foreach (var item in _added.ToArray())
{
var fs = _streams[item].Item2;
if (final)
{
using (fs)
{
await collection.AddFile(item.Model.Name, fs);
}
}
else
{
await collection.AddFile(item.Model.Name, fs);
fs.Position = 0;
}
}
foreach (var item in _renamed.ToArray())
{
await collection.RenameFile(item.Item1, item.Item2);
}
if (final)
{
_added.Clear();
_removed.Clear();
_renamed.Clear();
}
}
private static async Task InheritContent(SIDocument doc, SIDocument doc2, Question question)
{
foreach (var atom in question.Scenario)
{
if (atom.Type == AtomTypes.Text || atom.Type == AtomTypes.Oral)
{
continue;
}
var link = doc2.GetLink(atom);
if (link.GetStream != null)
{
DataCollection collection = null;
switch (atom.Type)
{
case AtomTypes.Video:
collection = doc.Video;
break;
case AtomTypes.Audio:
collection = doc.Audio;
break;
case AtomTypes.Image:
collection = doc.Images;
break;
}
if (collection != null)
{
using (var stream = link.GetStream().Stream)
{
await collection.AddFile(link.Uri, stream);
}
}
}
}
}
public async Task Commit(DataCollection collection)
{
foreach (var item in _removed.ToArray())
{
collection.RemoveFile(item.Model.Name);
item.PropertyChanged -= Named_PropertyChanged;
_removed.Remove(item);
}
foreach (var item in _added.ToArray())
{
try
{
using (var fs = _streams[item].Item2)
{
await collection.AddFile(item.Model.Name, fs);
}
}
catch (Exception exc)
{
OnError(exc);
}
_added.Remove(item);
_streams.Remove(item);
}
foreach (var item in _renamed.ToArray())
{
await collection.RenameFile(item.Item1, item.Item2);
_renamed.Remove(item);
}
HasPendingChanges = false;
}
