private static async Task <int> AsyncMain(Config config)
{
var exitToken = new CancellationTokenSource();
Console.CancelKeyPress += (sender, cancelArgs) => { exitToken.Cancel(); };
var service = new Gmail(
config.GoogleCredentials.Secrets,
config.StoredGoogleCredentialsPath,
Scopes,
ApplicationName, exitToken.Token);
var bot = new Broadcaster(
config.TelegramApiToken,
config.TelegramChatGroupIds,
cancellationToken: exitToken.Token
);
var periodicTimespan = TimeSpan.FromSeconds(config.PollInterval);
while (!exitToken.IsCancellationRequested)
{
try
{
Console.WriteLine($"[{DateTime.Now.ToLongDateString()} {DateTime.Now.ToLongTimeString()}] Polling");
await FetchUnread(service, bot, config.Label, exitToken.Token, config.MinimumImageSize)
.ConfigureAwait(false);
await Task.Delay(periodicTimespan, exitToken.Token).ConfigureAwait(false);
}
catch (TaskCanceledException)
{
}
}
return(0);
}
private static async Task FetchUnread(Gmail service, Broadcaster bot,
string label, CancellationToken cancellationToken, int minimumImageSize)
{
var messages = await service.GetUnreadMessage(label).ConfigureAwait(false);
var rawMessages = service.FetchMessages(messages, UsersResource.MessagesResource.GetRequest.FormatEnum.Raw);
foreach (var rawLazy in rawMessages)
{
var raw = await rawLazy.ConfigureAwait(false);
if (cancellationToken.IsCancellationRequested)
{
return;
}
try
{
Console.WriteLine($"ID: {raw.Id}");
var message = raw.ToMimeMessage();
Console.WriteLine(message.TextBody);
await Task.WhenAll(bot.SendMailToTelegram(message)).ConfigureAwait(false);
var images = message.BodyParts.InlineParts().ImageParts()
.Where(image => image.ContentDisposition?.Size > minimumImageSize);
foreach (var imagePart in images)
{
Console.WriteLine($"Content ID: {imagePart.ContentId} Content Location: {imagePart.ContentLocation}");
using (var imageStream = imagePart.ContentObject.Open())
{
await Task.WhenAll(bot.SendPhotoToTelegram(imageStream, imagePart.FileName,
$"{imagePart.ContentId}\n{imagePart.FileName}"));
}
}
var attachments = message.BodyParts.AttachmentParts().ToList();
var imageAttachments = attachments.ImageParts().ToList();
foreach (var imageAttachment in imageAttachments)
{
Console.WriteLine(
$"Content ID: {imageAttachment.ContentId} Content Location: {imageAttachment.ContentLocation}"
);
using (var imageStream = imageAttachment.ContentObject.Open())
{
await Task.WhenAll(bot.SendPhotoToTelegram(imageStream, imageAttachment.FileName,
$"{imageAttachment.ContentId}\n{imageAttachment.FileName}"));
}
}
var fileAttachments = attachments.Except(imageAttachments);
foreach (var fileAttachment in fileAttachments)
{
Console.WriteLine(
$"Content ID: {fileAttachment.ContentId} Content Location: {fileAttachment.ContentLocation}"
);
using (var fileStream = fileAttachment.ContentObject.Open())
{
await Task.WhenAll(bot.SendFileToTelegram(fileStream, fileAttachment.FileName,
$"{fileAttachment.ContentId}\n{fileAttachment.FileName}"));
}
}
}
catch (FormatException e)
{
Console.WriteLine(e);
}
}
await Task.WhenAll(service.MarkRead(messages)).ConfigureAwait(false);
}