/// <summary>
/// Create an ContactCollectionChangedEventArgs object.
/// </summary>
/// <param name="change">The type of change being signaled by the event (must be Added or Removed).</param>
/// <param name="contactId">The id of the contact being added or removed.</param>
/// <exception cref="System.ArgumentException">
/// An invalid ContactCollectionChangeType was provided.
/// This constructor can only be used with the Added and Removed types.
/// </exception>
public ContactCollectionChangedEventArgs(ContactCollectionChangeType change, string contactId)
{
if (change != ContactCollectionChangeType.Added
&& change != ContactCollectionChangeType.Removed)
{
throw new ArgumentException("This constructor can only be used for the ChangeTypes 'Added' and 'Removed'.");
}
Verify.IsNeitherNullNorEmpty(contactId, "contactId");
_oldId = null;
_newId = null;
switch (change)
{
case ContactCollectionChangeType.Added:
_newId = contactId;
break;
case ContactCollectionChangeType.Removed:
_oldId = contactId;
break;
}
_change = change;
}
private void _TryGetContactInfo(string path, string key, out ContactInfo newInfo, ref ContactCollectionChangeType action)
{
newInfo = new ContactInfo();
Assert.IsTrue(_dispatcher.CheckAccess());
bool failedMissingFile = false;
bool failedBadData = false;
bool failedManagerIsGone = false;
try
{
// We just have a file with this extension, it's not necessarily valid.
// If we can't get a contact from it then don't raise a notification.
using (Contact contact = _loader.GetByFilePath(path))
{
newInfo.Id = contact.Id;
newInfo.LastWrite = File.GetLastWriteTime(path);
}
_knownContacts[key] = newInfo;
}
// Couldn't load the file. Whatever...
catch (FileNotFoundException) { failedMissingFile = true; }
catch (DirectoryNotFoundException) { failedMissingFile = true; }
catch (InvalidDataException) { failedBadData = true; }
catch (ObjectDisposedException) { failedManagerIsGone = true; }
// Let these propagate to the caller.
catch (IOException)
{
throw;
}
catch (UnauthorizedAccessException)
{
throw;
}
catch (Exception e)
{
// Not expecting other exceptions here, but if we hit them then throw away the cached object.
Assert.Fail(e.ToString());
failedBadData = true;
}
// Only care about failures if we're still processing.
if (_stopProcessing)
{
action = ContactCollectionChangeType.NoChange;
return;
}
if (failedBadData)
{
// If we couldn't load the file and this was going to be treated as an add, then just do nothing.
action = (ContactCollectionChangeType.Added == action)
? ContactCollectionChangeType.NoChange
: ContactCollectionChangeType.Removed;
_knownContacts.Remove(key);
}
else if (failedMissingFile)
{
// If we couldn't load the file and this was going to be treated as an add, then just do nothing.
switch (action)
{
case ContactCollectionChangeType.Added:
action = ContactCollectionChangeType.NoChange;
break;
case ContactCollectionChangeType.Updated:
_SetPendingFile(path);
_timer.Start();
action = ContactCollectionChangeType.NoChange;
break;
default:
action = ContactCollectionChangeType.Removed;
_knownContacts.Remove(key);
break;
}
}
else if (failedManagerIsGone)
{
// We should stop processing these...
action = ContactCollectionChangeType.NoChange;
}
}
/// <summary>
/// Create an ContactCollectionChangedEventArgs object.
/// </summary>
/// <param name="change">The type of change being signaled by the event (must be Moved or Updated).</param>
/// <param name="oldContactId">The original id of the affected contact before the change.</param>
/// <param name="newContactId">The id of the contact after the change. This may be the same as the old id.</param>
/// <exception cref="System.ArgumentException">
/// An invalid ContactCollectionChangeType was provided.
/// This constructor can only be used with the Moved and Updated types.
/// </exception>
public ContactCollectionChangedEventArgs(ContactCollectionChangeType change, string oldContactId, string newContactId)
{
if (change != ContactCollectionChangeType.Moved
&& change != ContactCollectionChangeType.Updated)
{
throw new ArgumentException("This constructor can only be used for the ChangeType 'Moved' and 'Updated'.");
}
Verify.IsNeitherNullNorEmpty(newContactId, "newContactId");
Verify.IsNeitherNullNorEmpty(oldContactId, "oldContactId");
_oldId = oldContactId;
_newId = newContactId;
_change = change;
}
