#############################################################################
# Copyright (c) 2018 Balabit
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 as published
# by the Free Software Foundation, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#
# As an additional exemption you are allowed to compile & link against the
# OpenSSL libraries as published by the OpenSSL project. See the file
# COPYING for details.
#
#############################################################################

# Throttle: https://core.telegram.org/bots/faq#my-bot-is-hitting-limits-how-do-i-avoid-this
# max-size: message size maximum is 4096. Other fields than message do not count.
block destination telegram(
      bot-id()
      chat-id()
      template("${MSG}")
      parse-mode("none")
      throttle(1)
      disable-web-page-preview("true")
      disable-notification("false")
      extra-parameters("")
      use-system-cert-store(yes)
      max-size(4096)
      ...)
{

@requires http "The telegram() driver depends on the syslog-ng http module, please install the syslog-ng-mod-http (Debian & derivatives) or the syslog-ng-http (RHEL & co) package"

    http(
        url("https://api.telegram.org/bot`bot-id`/sendMessage")
        method("POST")
        body("disable_web_page_preview=`disable-web-page-preview`&disable_notification=`disable-notification`&parse_mode=`parse-mode`&chat_id=`chat-id`&`extra-parameters`&text=$(url-encode $(substr \"`template`\" 0 `max-size`))\n")
        throttle(`throttle`)
        use-system-cert-store(`use-system-cert-store`)
        `__VARARGS__`
    );
};
