<?php

abstract class MessageHandler
{
    abstract public function TryHandle($room_id, $msgid, $message, $room_lang): bool;

    protected $token = 'CHANGEME';
    public $PrintToScreen = false;

    protected function sendMessage($chat, $content, $reply = null, $keyboard = null) {
        return $this->makeRequest('sendMessage', array(
            'chat_id' => $chat,
            'text' => $content,
            'reply_to_message_id' => $reply,
            'reply_markup' => $keyboard
        ));
    }

    protected function sendSticker($chat, $sticker_id, $reply = null) {
        return $this->makeRequest('sendSticker', array(
            'chat_id' => $chat,
            'sticker' => $sticker_id,
            'reply_to_message_id' => $reply
        ));
    }

    protected function sendPhoto($chat, $file_id, $reply = null) {
        return $this->makeRequest('sendSticker', array(
            'chat_id' => $chat,
            'photo' => $file_id,
            'reply_to_message_id' => $reply
        ));
    }

    private function makeRequest($method, $data, $post = true) {
        if($this->PrintToScreen){
            echo get_class($this), ' ', $method, ' ', json_encode($data, JSON_PRETTY_PRINT), "\n";
            return ;
        }

        $url = 'https://api.telegram.org/bot' . $this->token . '/' . $method;

        $options = array(
            'http' => array(
                'header' => "Content-type: application/x-www-form-urlencoded\r\n",
                'method' => ($post)? 'GET':'POST'
            )
        );
        if ($post) { // POST request
            $options['http']['content'] = http_build_query($data);
        } else { // GET Request
            $url .= '?' . http_build_query($data);
        }
        $context = stream_context_create($options);

        return file_get_contents($url, false, $context);
    }
}