/// <summary>
/// Sends a message to the given target (user or group chat)
/// </summary>
/// <param name="target">A User or GroupChat</param>
/// <param name="messageText">The text of the message</param>
/// <param name="disableLinkPreview">Whether or not to disable link previews</param>
/// <param name="replyTarget">The message to reply to</param>
/// <param name="forceReplyOptions">Specifies that the message must be replied to, and what users must reply</param>
/// <returns>The message that was sent.</returns>
public Message SendMessage(MessageTarget target, string messageText, bool disableLinkPreview = false, Message replyTarget = null, ForceReplyOptions forceReplyOptions = null)
{
var request = new RestRequest("sendMessage", Method.POST)
{
RootElement = "result"
};
request.AddParameter("chat_id", target.Id);
request.AddParameter("text", messageText);
request.AddParameter("disable_web_page_preview", disableLinkPreview);
if (replyTarget != null)
{
request.AddParameter("reply_to_message_id", replyTarget.MessageId);
}
if (forceReplyOptions != null)
{
request.AddParameter("reply_markup", SimpleJson.SerializeObject(forceReplyOptions));
}
var result = _client.Execute<Message>(request);
return result.Data;
}
/// <summary>
/// Forward a message from one chat to another.
/// </summary>
/// <param name="message">The message to forward.</param>
/// <param name="target">The user/group to send to.</param>
/// <returns>The message that was forwarded</returns>
public Message ForwardMessage(Message message, MessageTarget target)
{
var request = new RestRequest("forwardMessage", Method.POST)
{
RootElement = "result"
};
request.AddParameter("chat_id", target.Id);
request.AddParameter("from_chat_id", (message.Chat == null ? message.From.Id : message.Chat.Id));
request.AddParameter("message_id", message.MessageId);
var result = _client.Execute<Message>(request);
return result.Data;
}
/// <summary>
/// Sends a photo to the given target (user or group chat)
/// </summary>
/// <param name="target">A User or GroupChat</param>
/// <param name="imageStream">A stream containing the data for the image</param>
/// <param name="caption">A caption for the image</param>
/// <param name="filename">The filename to report to Telegram</param>
/// <returns>The message that was sent.</returns>
public Message SendPhoto(MessageTarget target, Stream imageStream, string caption = null, string filename = "picture.jpg")
{
if (filename == null) { throw new ArgumentNullException("filename", "Lectern requires a filename with proper extension."); }
if (!filename.Contains(".")) { throw new ArgumentException("Lectern requires a filename with proper extension.", "filename"); }
var request = new RestRequest("sendPhoto", Method.POST)
{
RootElement = "result"
};
request.AddParameter("chat_id", target.Id);
request.AddFile("photo", imageStream.CopyTo, filename);
request.AddParameter("caption", caption);
request.AddHeader("Content-Type", "multipart/form-data");
var result = _client.Execute<Message>(request);
imageStream.Close();
return result.Data;
}
/// <summary>
/// Indicates that the bot is doing a specified action
/// </summary>
/// <param name="target">The target to indicate towards</param>
/// <param name="action">The action the bot is doing (from the ChatAction class)</param>
public void SendChatAction(MessageTarget target, string action)
{
var request = new RestRequest("sendChatAction", Method.POST);
request.AddParameter("chat_id", target.Id);
request.AddParameter("action", action);
_client.Execute(request);
}
