// Get ids of items that changed for a given type ID
public IAsyncOperation <IList <string> > GetIDsOfChangedItemsForTypeAsync(string typeID)
{
if (string.IsNullOrEmpty(typeID))
{
throw new ArgumentException("typeID");
}
return(AsyncInfo.Run(async cancelToken =>
{
List <string> ids = new List <string>();
using (await CrossThreadLockScope.Enter(m_lock))
{
await this.EnsureIndexAsync();
foreach (string itemID in m_itemIDIndex)
{
RecordItemChange change = await this.GetChangeAsync(itemID);
if (change != null && change.IsChangeForType(typeID))
{
ids.Add(itemID);
}
}
return (IList <string>)ids;
}
}));
}
// Are there any changes for the given type ID?
public IAsyncOperation <bool> HasChangesForTypeAsync(string typeID)
{
if (string.IsNullOrEmpty(typeID))
{
throw new ArgumentException("typeID");
}
return(AsyncInfo.Run(async cancelToken =>
{
using (await CrossThreadLockScope.Enter(m_lock))
{
await this.EnsureIndexAsync();
foreach (string itemID in m_itemIDIndex)
{
RecordItemChange change = await this.GetChangeAsync(itemID);
if (change != null && change.IsChangeForType(typeID))
{
return true;
}
}
return false;
}
}));
}
// Remove all pending changes for a given type ID
public IAsyncAction RemoveAllChangesForTypeAsync(string typeID)
{
if (string.IsNullOrEmpty(typeID))
{
throw new ArgumentException("typeID");
}
return(AsyncInfo.Run(async cancelToken =>
{
using (await CrossThreadLockScope.Enter(m_lock))
{
await this.EnsureIndexAsync();
string[] allIDs = m_itemIDIndex.ToArray();
foreach (string itemID in allIDs)
{
RecordItemChange change = await this.GetChangeAsync(itemID);
if (change != null && change.IsChangeForType(typeID))
{
await this.DeleteChangeAsync(itemID);
}
}
}
}));
}
