private async Task <List <AzureADUser> > GetUsersForEachGroup(IEnumerable <AzureADGroup> groups, Guid runId)
{
if (!groups.Any())
{
return(null);
}
var toReturn = new List <AzureADUser>();
foreach (var group in groups)
{
if (await _graphGroupRepository.GroupExists(group.ObjectId))
{
await _log.LogMessageAsync(new LogMessage { RunId = runId, Message = $"Reading users from the group with ID {group.ObjectId}." });
var users = await _graphGroupRepository.GetUsersInGroupTransitively(group.ObjectId);
var newUsers = users.Except(toReturn).ToArray();
await _log.LogMessageAsync(new LogMessage { RunId = runId, Message = $"Got {users.Count} users from the group with ID {group.ObjectId}. " +
$"The group contains {users.Count - newUsers.Length} users who have already been read from earlier groups." });
toReturn.AddRange(newUsers);
}
else
{
await _log.LogMessageAsync(new LogMessage { RunId = runId, Message = $"Group with ID {group.ObjectId} doesn't exist. Stopping sync and marking as error." });
return(null);
}
}
return(toReturn);
}
public async Task <PolicyResult <bool> > GroupExistsAsync(Guid objectId, Guid runId)
{
// make this fresh every time because the lambda has to capture the run ID
_graphRetryPolicy = Policy.Handle <SocketException>().WaitAndRetryAsync(NumberOfGraphRetries, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)),
onRetry: async(ex, count) =>
{
await _log.LogMessageAsync(new LogMessage
{
Message = $"Got a transient SocketException. Retrying. This was try {count} out of {NumberOfGraphRetries}.\n" + ex.ToString(),
RunId = runId
});
});
return(await _graphRetryPolicy.ExecuteAndCaptureAsync(() => _graphGroupRepository.GroupExists(objectId)));
}