public void EnqueueMessage(TelegramOutboundMessage message)
{
if (message == null) throw new ArgumentNullException(nameof(message));
if (!Settings.IsEnabled)
{
return;
}
_pendingMessages.Add(message);
}
private async Task SendMessageAsync(TelegramOutboundMessage message)
{
if (message == null) throw new ArgumentNullException(nameof(message));
using (var httpClient = new HttpClient())
{
string uri = $"{BaseUri}{Settings.AuthenticationToken}/sendMessage";
StringContent body = ConvertOutboundMessageToJsonMessage(message);
HttpResponseMessage response = await httpClient.PostAsync(uri, body);
if (!response.IsSuccessStatusCode)
{
Log.Warning(
$"Sending Telegram message failed (Message='${message.Text}' StatusCode={response.StatusCode}).");
}
else
{
Log.Info($"Sent Telegram message '{message.Text}' to chat {message.ChatId}.");
}
}
}
private StringContent ConvertOutboundMessageToJsonMessage(TelegramOutboundMessage message)
{
if (message.Text.Length > 4096)
{
throw new InvalidOperationException("The Telegram outbound message is too long.");
}
var json = new JObject
{
["chat_id"] = message.ChatId,
["text"] = message.Text
};
if (message.Format == TelegramMessageFormat.HTML)
{
json["parse_mode"] = "HTML";
}
return new StringContent(json.ToString(), Encoding.UTF8, "application/json");
}
