TelegramBot.own

class TelegramBot {
  def TelegramBot(token) {
    this.token = token
  }

  def getUpdatesSync() = this.invokeJsonSync("getUpdates").result
  def getFileSync(fileId) = this.invokeJsonSync("getFile", {"file_id": fileId}).result

  def sendPhoto(chatId, photo, callback = 0) {
    return this.invokeJson("sendPhoto", {
      "chat_id": chatId,
      "photo": photo
    }, default(callback, def(r) {}))
  }
  def sendPhotoSync(chatId, photo) {
    return this.invokeJsonSync("sendPhoto", {
      "chat_id": chatId,
      "photo": photo
    })
  }

  def sendMediaGroup(chatId, media, callback = 0) {
    return this.invokeJson("sendMediaGroup", {
      "chat_id": chatId,
      "media": jsonencode(media)
    }, default(callback, def(r) {}))
  }
  def sendMediaGroupSync(chatId, photo) {
    return this.invokeJsonSync("sendMediaGroup", {
      "chat_id": chatId,
      "media": jsonencode(media)
    })
  }

  def createUrl(method, params) {
    str = "https://api.telegram.org/bot" + this.token + "/" + method + "?"
    params["access_token"] = this.token
    for k, v : params
      str += k + "=" + urlencode(v) + "&"
    return str
  }
  
  def invokeJsonSync(method, params = {}) {
    return sync(def(ret) = http(this.createUrl(method, params), combine(::jsondecode, ret)))
  }

  def toFileUrl(filePath) = "https://api.telegram.org/file/bot" + this.token + "/" + filePath

  def invokeJson(method, params, callback) {
    return http(this.createUrl(method, params), combine(::jsondecode, callback))
  }

  def invoke(method, params, callback) {
    return http(this.createUrl(method, params), callback)
  }
}