public async Task <ExchangeSyncResult> ExecuteFirstSyncAsync(ExchangeConnectionInfo connectionInfo, ExchangeChangeSet changeSet)
{
ExchangeSyncResult loginResult = await this.EnsureLoginAsync(this.taskFolderId, connectionInfo);
if (loginResult != null)
{
return(loginResult);
}
ActiveSyncServer server = CreateExchangeServer(connectionInfo);
// Start sync with sync state = 0
// In this case we only obtain a non ero syncKey to use with future queries
SyncCommandResult syncCommandResult = await server.Sync(InitialSyncKey, this.taskFolderId, new ExchangeChangeSet());
connectionInfo.PolicyKey = server.PolicyKey;
if (syncCommandResult.Status != StatusOk)
{
var result = new ExchangeSyncResult
{
AuthorizationResult = this.GetFailedAuthResult("ExecuteFirstSync", syncCommandResult)
};
return(result);
}
// As it is first sync, we have just picked a new SyncId
// We have to re-sync with this new SyncId
return(await this.ExecuteSyncAsync(connectionInfo, changeSet, syncCommandResult.SyncKey, this.taskFolderId, true));
}
private async Task <ExchangeSyncResult> ExecuteSyncAsync(ExchangeConnectionInfo connectionInfo, ExchangeChangeSet changeSet, string syncState, string folderId, bool isFirstSync)
{
if (connectionInfo == null)
{
throw new ArgumentNullException("connectionInfo");
}
if (changeSet == null)
{
throw new ArgumentNullException("changeSet");
}
if (string.IsNullOrEmpty(syncState))
{
throw new ArgumentNullException("syncState");
}
if (string.IsNullOrEmpty(folderId) || connectionInfo.ServerUri == null || string.IsNullOrWhiteSpace(connectionInfo.ServerUri.ToString()))
{
ExchangeSyncResult loginResult = await this.EnsureLoginAsync(folderId, connectionInfo);
if (loginResult != null)
{
return(loginResult);
}
}
else
{
this.taskFolderId = folderId;
}
ActiveSyncServer server = CreateExchangeServer(connectionInfo);
ExchangeSyncResult returnValue = new ExchangeSyncResult
{
SyncState = syncState,
ChangeSet = new ExchangeChangeSet()
};
bool mustSync = true;
while (mustSync)
{
SyncCommandResult result = await server.Sync(returnValue.SyncState, this.taskFolderId, changeSet);
if (result.Status != StatusOk)
{
returnValue.AuthorizationResult = this.GetFailedAuthResult("Sync", result);
mustSync = false;
}
else
{
returnValue.AuthorizationResult = new ExchangeAuthorizationResult
{
AuthorizationStatus = ExchangeAuthorizationStatus.OK,
IsOperationSuccess = true,
ServerUri = connectionInfo.ServerUri
};
if (result.SyncKey != null)
{
returnValue.SyncState = result.SyncKey;
}
connectionInfo.PolicyKey = server.PolicyKey;
// If we don't have any syncstate (nothing has changed) we return the old one
returnValue.OperationResult.IsOperationSuccess = true;
returnValue.ChangeSet.AddedTasks.AddRange(result.AddedTasks);
returnValue.ChangeSet.ModifiedTasks.AddRange(result.ModifiedTasks);
returnValue.ChangeSet.DeletedTasks.AddRange(result.DeletedTasks);
returnValue.TaskAddedCount += result.ServerAddedTasks;
returnValue.TaskEditedCount += result.ServerModifiedTasks;
foreach (var map in result.ClientServerMapIds)
{
returnValue.AddMap(map.Key, map.Value);
}
returnValue.TaskDeletedCount += changeSet.DeletedTasks.Count;
mustSync = result.MoreAvailable;
changeSet = new ExchangeChangeSet(); // changeSet has been pushed to server, reset it !
}
}
return(returnValue);
}
