<?php
include_once __DIR__.'/prefs.php';

class Post_To_Telegram extends Plugin {
	private $host;

	function about() {
		return array(1.0,
			"Filter action to send articles to Telegram",
			"Oreolek");
	}

	function init($host) {
		$this->host = $host;

		$this->pdo = Db::pdo();

		$host->add_hook($host::HOOK_ARTICLE_FILTER_ACTION, $this);
		$host->add_hook($host::HOOK_FILTER_TRIGGERED, $this);

		$host->add_filter_action($this, "action_telegram", "Send to Telegram");
	}

	function flags() {
		return array("needs_curl" => true);
	}

	function hook_filter_triggered($feed_id, $owner_uid, $article, $matched_filters, $matched_rules, $article_filters) {
		# Don't apply to articles that have been deleted by a previous filter
		$delete = false;
		foreach($article_filters as $action_key => $action) {
			if ($action["type"] === "filter") {
				$delete = true;
			}
			if ($delete && $action["param"] === "Post_To_Telegram:action_telegram") {
				unset($article_filters[$action_key]);
			}
		}
	}

	function hook_article_filter_action($article, $action) {
		if ($action == "action_telegram") {
			if (!function_exists("curl_init"))
				return $article;

			# Ignore articles that are already in the database so we only trigger the webhook once
			$csth = $this->pdo->prepare("SELECT id FROM ttrss_entries
				WHERE guid = ? OR guid = ?");
			$csth->execute([$article['guid'], $article['guid_hashed']]);
			if ($row = $csth->fetch()) {
				Debug::log("Article already in database, not triggering telegram..", Debug::$LOG_VERBOSE);
				return $article;
			}

			$content = '### '.$article["title"] . "\n" . $article["link"] . "\n" . $article['content'];

      $telegram = new Longman\TelegramBot\Telegram(
        TELEGRAM_API_KEY,
        TELEGRAM_BOT_NAME
      );
      \Longman\TelegramBot\Request::sendMessage([
        'chat_id' => TELEGRAM_CHAT_ID,
        'text' => $content,
        'parse_mode' => 'Markdown'
      ]);
    }

    return $article;
  }

  function api_version() {
    return 2;
  }

}
?>